Annotation of loncom/interface/lonnavmaps.pm, revision 1.524
1.481 foxr 1: # The LearningOnline Network with CAPA
1.2 www 2: # Navigate Maps Handler
1.1 www 3: #
1.524 ! damieng 4: # $Id: lonnavmaps.pm,v 1.523 2016/09/01 19:31:05 damieng Exp $
1.20 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.245 www 28: ###
1.2 www 29:
1.416 jms 30: =pod
31:
32: =head1 NAME
33:
1.435 raeburn 34: Apache::lonnavmaps - Subroutines to handle and render the navigation
1.416 jms 35:
36: =head1 SYNOPSIS
37:
38: Handles navigational maps.
39:
40: The main handler generates the navigational listing for the course,
41: the other objects export this information in a usable fashion for
42: other modules.
43:
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48:
49: =head1 OVERVIEW
50:
1.439 wenzelju 51: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
1.416 jms 52: course structure and caches it in what is often referred to as the
53: "big hash" X<big hash>. You can see it if you are logged into
54: LON-CAPA, in a course, by going to /adm/test. (You may need to
55: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
56: content of the hash will be under the heading "Big Hash".
57:
58: Big Hash contains, among other things, how resources are related
59: to each other (next/previous), what resources are maps, which
60: resources are being chosen to not show to the student (for random
61: selection), and a lot of other things that can take a lot of time
62: to compute due to the amount of data that needs to be collected and
63: processed.
64:
65: Apache::lonnavmaps provides an object model for manipulating this
66: information in a higher-level fashion than directly manipulating
67: the hash. It also provides access to several auxilary functions
68: that aren't necessarily stored in the Big Hash, but are a per-
69: resource sort of value, like whether there is any feedback on
70: a given resource.
71:
72: Apache::lonnavmaps also abstracts away branching, and someday,
73: conditions, for the times where you don't really care about those
74: things.
75:
76: Apache::lonnavmaps also provides fairly powerful routines for
77: rendering navmaps, and last but not least, provides the navmaps
78: view for when the user clicks the NAV button.
79:
80: B<Note>: Apache::lonnavmaps I<only> works for the "currently
81: logged in user"; if you want things like "due dates for another
82: student" lonnavmaps can not directly retrieve information like
83: that. You need the EXT function. This module can still help,
84: because many things, such as the course structure, are constant
85: between users, and Apache::lonnavmaps can help by providing
86: symbs for the EXT call.
87:
88: The rest of this file will cover the provided rendering routines,
89: which can often be used without fiddling with the navmap object at
90: all, then documents the Apache::lonnavmaps::navmap object, which
91: is the key to accessing the Big Hash information, covers the use
92: of the Iterator (which provides the logic for traversing the
93: somewhat-complicated Big Hash data structure), documents the
94: Apache::lonnavmaps::Resource objects that are returned by
95:
96: =head1 Subroutine: render
97:
98: The navmap renderer package provides a sophisticated rendering of the
99: standard navigation maps interface into HTML. The provided nav map
100: handler is actually just a glorified call to this.
101:
102: Because of the large number of parameters this function accepts,
103: instead of passing it arguments as is normal, pass it in an anonymous
104: hash with the desired options.
105:
106: The package provides a function called 'render', called as
107: Apache::lonnavmaps::render({}).
108:
109: =head2 Overview of Columns
110:
111: The renderer will build an HTML table for the navmap and return
112: it. The table consists of several columns, and a row for each
113: resource (or possibly each part). You tell the renderer how many
114: columns to create and what to place in each column, optionally using
115: one or more of the prepared columns, and the renderer will assemble
116: the table.
117:
118: Any additional generally useful column types should be placed in the
119: renderer code here, so anybody can use it anywhere else. Any code
120: specific to the current application (such as the addition of <input>
121: elements in a column) should be placed in the code of the thing using
122: the renderer.
123:
124: At the core of the renderer is the array reference COLS (see Example
125: section below for how to pass this correctly). The COLS array will
126: consist of entries of one of two types of things: Either an integer
127: representing one of the pre-packaged column types, or a sub reference
128: that takes a resource reference, a part number, and a reference to the
129: argument hash passed to the renderer, and returns a string that will
130: be inserted into the HTML representation as it.
131:
132: All other parameters are ways of either changing how the columns
133: are printing, or which rows are shown.
134:
135: The pre-packaged column names are refered to by constants in the
136: Apache::lonnavmaps namespace. The following currently exist:
137:
138: =over 4
139:
140: =item * B<Apache::lonnavmaps::resource>:
141:
142: The general info about the resource: Link, icon for the type, etc. The
143: first column in the standard nav map display. This column provides the
144: indentation effect seen in the B<NAV> screen. This column also accepts
145: the following parameters in the renderer hash:
146:
147: =over 4
148:
149: =item * B<resource_nolink>: default false
150:
151: If true, the resource will not be linked. By default, all non-folder
152: resources are linked.
153:
154: =item * B<resource_part_count>: default true
155:
156: If true, the resource will show a part count B<if> the full
157: part list is not displayed. (See "condense_parts" later.) If false,
158: the resource will never show a part count.
159:
160: =item * B<resource_no_folder_link>:
161:
162: If true, the resource's folder will not be clickable to open or close
163: it. Default is false. True implies printCloseAll is false, since you
164: can't close or open folders when this is on anyhow.
165:
1.493 raeburn 166: =item * B<map_no_edit_link>:
167:
168: If true, the title of the folder or page will not be followed by an
169: icon/link to direct editing of a folder or composite page, originally
170: added via the Course Editor.
171:
1.416 jms 172: =back
173:
174: =item * B<Apache::lonnavmaps::communication_status>:
175:
176: Whether there is discussion on the resource, email for the user, or
177: (lumped in here) perl errors in the execution of the problem. This is
178: the second column in the main nav map.
179:
180: =item * B<Apache::lonnavmaps::quick_status>:
181:
182: An icon for the status of a problem, with five possible states:
183: Correct, incorrect, open, awaiting grading (for a problem where the
184: computer's grade is suppressed, or the computer can't grade, like
185: essay problem), or none (not open yet, not a problem). The
186: third column of the standard navmap.
187:
188: =item * B<Apache::lonnavmaps::long_status>:
189:
190: A text readout of the details of the current status of the problem,
191: such as "Due in 22 hours". The fourth column of the standard navmap.
192:
193: =item * B<Apache::lonnavmaps::part_status_summary>:
194:
195: A text readout summarizing the status of the problem. If it is a
196: single part problem, will display "Correct", "Incorrect",
197: "Not yet open", "Open", "Attempted", or "Error". If there are
198: multiple parts, this will output a string that in HTML will show a
199: status of how many parts are in each status, in color coding, trying
200: to match the colors of the icons within reason.
1.1 www 201:
1.416 jms 202: Note this only makes sense if you are I<not> showing parts. If
203: C<showParts> is true (see below), this column will not output
204: anything.
1.2 www 205:
1.416 jms 206: =back
1.133 bowersj2 207:
1.416 jms 208: If you add any others please be sure to document them here.
1.133 bowersj2 209:
1.416 jms 210: An example of a column renderer that will show the ID number of a
211: resource, along with the part name if any:
1.140 bowersj2 212:
1.416 jms 213: sub {
214: my ($resource, $part, $params) = @_;
215: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
216: return '<td>' . $resource->{ID} . '</td>';
217: }
1.135 bowersj2 218:
1.416 jms 219: Note these functions are responsible for the TD tags, which allow them
220: to override vertical and horizontal alignment, etc.
1.133 bowersj2 221:
1.416 jms 222: =head2 Parameters
1.130 www 223:
1.416 jms 224: Minimally, you should be
225: able to get away with just using 'cols' (to specify the columns
226: shown), 'url' (necessary for the folders to link to the current screen
227: correctly), and possibly 'queryString' if your app calls for it. In
228: that case, maintaining the state of the folders will be done
229: automatically.
1.268 albertel 230:
1.416 jms 231: =over 4
1.268 albertel 232:
1.483 raeburn 233: =item * B<iterator>: default: constructs one from %env
1.51 bowersj2 234:
1.416 jms 235: A reference to a fresh ::iterator to use from the navmaps. The
236: rendering will reflect the options passed to the iterator, so you can
237: use that to just render a certain part of the course, if you like. If
238: one is not passed, the renderer will attempt to construct one from
239: env{'form.filter'} and env{'form.condition'} information, plus the
240: 'iterator_map' parameter if any.
1.51 bowersj2 241:
1.416 jms 242: =item * B<iterator_map>: default: not used
1.51 bowersj2 243:
1.416 jms 244: If you are letting the renderer do the iterator handling, you can
245: instruct the renderer to render only a particular map by passing it
246: the source of the map you want to process, like
247: '/res/103/jerf/navmap.course.sequence'.
1.51 bowersj2 248:
1.416 jms 249: =item * B<include_top_level_map>: default: false
1.51 bowersj2 250:
1.416 jms 251: If you need to include the top level map (meaning the course) in the
252: rendered output set this to true
1.51 bowersj2 253:
1.416 jms 254: =item * B<navmap>: default: constructs one from %env
1.51 bowersj2 255:
1.416 jms 256: A reference to a navmap, used only if an iterator is not passed in. If
257: this is necessary to make an iterator but it is not passed in, a new
258: one will be constructed based on env info. This is useful to do basic
259: error checking before passing it off to render.
1.51 bowersj2 260:
1.416 jms 261: =item * B<r>: default: must be passed in
1.53 bowersj2 262:
1.416 jms 263: The standard Apache response object. This must be passed to the
264: renderer or the course hash will be locked.
1.53 bowersj2 265:
1.416 jms 266: =item * B<cols>: default: empty (useless)
1.407 raeburn 267:
1.416 jms 268: An array reference
1.53 bowersj2 269:
1.416 jms 270: =item * B<showParts>:default true
1.115 bowersj2 271:
1.416 jms 272: A flag. If true, a line for the resource itself, and a line
273: for each part will be displayed. If not, only one line for each
274: resource will be displayed.
1.115 bowersj2 275:
1.416 jms 276: =item * B<condenseParts>: default true
1.115 bowersj2 277:
1.416 jms 278: A flag. If true, if all parts of the problem have the same
279: status and that status is Nothing Set, Correct, or Network Failure,
280: then only one line will be displayed for that resource anyhow. If no,
281: all parts will always be displayed. If showParts is 0, this is
282: ignored.
1.115 bowersj2 283:
1.416 jms 284: =item * B<jumpCount>: default: determined from %env
1.115 bowersj2 285:
1.416 jms 286: A string identifying the URL to place the anchor 'curloc' at.
287: It is the responsibility of the renderer user to
288: ensure that the #curloc is in the URL. By default, determined through
289: the use of the env{} 'jump' information, and should normally "just
290: work" correctly.
1.177 www 291:
1.416 jms 292: =item * B<here>: default: empty string
1.68 bowersj2 293:
1.416 jms 294: A Symb identifying where to place the 'here' marker. The empty
295: string means no marker.
1.73 bowersj2 296:
1.416 jms 297: =item * B<indentString>: default: 25 pixel whitespace image
1.347 www 298:
1.416 jms 299: A string identifying the indentation string to use.
1.347 www 300:
1.416 jms 301: =item * B<queryString>: default: empty
1.346 foxr 302:
1.416 jms 303: A string which will be prepended to the query string used when the
304: folders are opened or closed. You can use this to pass
305: application-specific values.
1.73 bowersj2 306:
1.416 jms 307: =item * B<url>: default: none
1.73 bowersj2 308:
1.416 jms 309: The url the folders will link to, which should be the current
310: page. Required if the resource info column is shown, and you
311: are allowing the user to open and close folders.
1.73 bowersj2 312:
1.416 jms 313: =item * B<currentJumpIndex>: default: no jumping
1.73 bowersj2 314:
1.416 jms 315: Describes the currently-open row number to cause the browser to jump
316: to, because the user just opened that folder. By default, pulled from
317: the Jump information in the env{'form.*'}.
1.73 bowersj2 318:
1.416 jms 319: =item * B<printKey>: default: false
1.101 bowersj2 320:
1.416 jms 321: If true, print the key that appears on the top of the standard
322: navmaps.
1.73 bowersj2 323:
1.416 jms 324: =item * B<printCloseAll>: default: true
1.73 bowersj2 325:
1.416 jms 326: If true, print the "Close all folders" or "open all folders"
327: links.
1.403 albertel 328:
1.416 jms 329: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.346 foxr 330:
1.416 jms 331: A function that takes the resource object as its only parameter and
332: returns a true or false value. If true, the resource is displayed. If
333: false, it is simply skipped in the display.
1.346 foxr 334:
1.416 jms 335: =item * B<suppressEmptySequences>: default: false
1.346 foxr 336:
1.416 jms 337: If you're using a filter function, and displaying sequences to orient
338: the user, then frequently some sequences will be empty. Setting this to
339: true will cause those sequences not to display, so as not to confuse the
340: user into thinking that if the sequence is there there should be things
341: under it; for example, see the "Show Uncompleted Homework" view on the
342: B<NAV> screen.
1.73 bowersj2 343:
1.416 jms 344: =item * B<suppressNavmaps>: default: false
1.53 bowersj2 345:
1.416 jms 346: If true, will not display Navigate Content resources.
1.51 bowersj2 347:
1.416 jms 348: =back
1.133 bowersj2 349:
1.416 jms 350: =head2 Additional Info
1.174 albertel 351:
1.416 jms 352: In addition to the parameters you can pass to the renderer, which will
353: be passed through unchange to the column renderers, the renderer will
354: generate the following information which your renderer may find
355: useful:
1.174 albertel 356:
1.416 jms 357: =over 4
1.174 albertel 358:
1.416 jms 359: =item * B<counter>:
1.133 bowersj2 360:
1.416 jms 361: Contains the number of rows printed. Useful after calling the render
362: function, as you can detect whether anything was printed at all.
1.216 bowersj2 363:
1.416 jms 364: =item * B<isNewBranch>:
1.216 bowersj2 365:
1.416 jms 366: Useful for renderers: If this resource is currently the first resource
367: of a new branch, this will be true. The Resource column (leftmost in the
368: navmaps screen) uses this to display the "new branch" icon
1.216 bowersj2 369:
1.416 jms 370: =back
1.216 bowersj2 371:
1.416 jms 372: =cut
1.216 bowersj2 373:
374:
1.416 jms 375: =head1 SUBROUTINES
1.216 bowersj2 376:
1.416 jms 377: =over
1.216 bowersj2 378:
1.416 jms 379: =item update()
1.133 bowersj2 380:
1.416 jms 381: =item addToFilter()
1.133 bowersj2 382:
1.416 jms 383: Convenience functions: Returns a string that adds or subtracts
384: the second argument from the first hash, appropriate for the
385: query string that determines which folders to recurse on
1.174 albertel 386:
1.416 jms 387: =item removeFromFilter()
1.51 bowersj2 388:
1.416 jms 389: =item getLinkForResource()
1.51 bowersj2 390:
1.416 jms 391: Convenience function: Given a stack returned from getStack on the iterator,
392: return the correct src() value.
1.174 albertel 393:
1.416 jms 394: =item getDescription()
1.174 albertel 395:
1.416 jms 396: Convenience function: This separates the logic of how to create
397: the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
398: etc.) into a separate function. It takes a resource object as the
399: first parameter, and the part number of the resource as the second.
400: It's basically a big switch statement on the status of the resource.
1.174 albertel 401:
1.416 jms 402: =item dueInLessThan24Hours()
1.216 bowersj2 403:
1.416 jms 404: Convenience function, so others can use it: Is the problem due in less than 24 hours, and still can be done?
1.51 bowersj2 405:
1.416 jms 406: =item lastTry()
1.51 bowersj2 407:
1.416 jms 408: Convenience function, so others can use it: Is there only one try remaining for the
409: part, with more than one try to begin with, not due yet and still can be done?
1.51 bowersj2 410:
1.416 jms 411: =item advancedUser()
1.51 bowersj2 412:
1.416 jms 413: This puts a human-readable name on the env variable.
1.51 bowersj2 414:
1.416 jms 415: =item timeToHumanString()
1.51 bowersj2 416:
1.416 jms 417: timeToHumanString takes a time number and converts it to a
418: human-readable representation, meant to be used in the following
419: manner:
1.174 albertel 420:
1.416 jms 421: =over 4
1.51 bowersj2 422:
1.416 jms 423: =item * print "Due $timestring"
1.133 bowersj2 424:
1.416 jms 425: =item * print "Open $timestring"
1.133 bowersj2 426:
1.416 jms 427: =item * print "Answer available $timestring"
1.144 bowersj2 428:
1.133 bowersj2 429: =back
1.51 bowersj2 430:
1.416 jms 431: Very, very, very, VERY English-only... goodness help a localizer on
432: this func...
1.174 albertel 433:
1.417 jms 434: =item resource()
1.174 albertel 435:
1.417 jms 436: returns 0
1.51 bowersj2 437:
1.417 jms 438: =item communication_status()
1.51 bowersj2 439:
1.417 jms 440: returns 1
1.174 albertel 441:
1.417 jms 442: =item quick_status()
1.51 bowersj2 443:
1.417 jms 444: returns 2
1.225 bowersj2 445:
1.417 jms 446: =item long_status()
1.225 bowersj2 447:
1.417 jms 448: returns 3
1.225 bowersj2 449:
1.417 jms 450: =item part_status_summary()
1.51 bowersj2 451:
1.417 jms 452: returns 4
1.51 bowersj2 453:
1.417 jms 454: =item render_resource()
1.51 bowersj2 455:
1.417 jms 456: =item render_communication_status()
1.51 bowersj2 457:
1.417 jms 458: =item render_quick_status()
459:
460: =item render_long_status()
461:
462: =item render_parts_summary_status()
463:
464: =item setDefault()
465:
466: =item cmp_title()
467:
468: =item render()
469:
470: =item add_linkitem()
471:
1.476 raeburn 472: =item show_linkitems_toolbar()
1.130 www 473:
1.416 jms 474: =back
1.115 bowersj2 475:
1.416 jms 476: =cut
1.140 bowersj2 477:
1.416 jms 478: package Apache::lonnavmaps;
1.51 bowersj2 479:
1.416 jms 480: use strict;
481: use GDBM_File;
482: use Apache::loncommon();
483: use Apache::lonenc();
484: use Apache::lonlocal;
485: use Apache::lonnet;
1.465 foxr 486: use Apache::lonmap;
1.443 foxr 487:
1.416 jms 488: use POSIX qw (floor strftime);
489: use Time::HiRes qw( gettimeofday tv_interval );
490: use LONCAPA;
491: use DateTime();
1.486 raeburn 492: use HTML::Entities;
1.465 foxr 493:
494: # For debugging
495:
1.499 raeburn 496: #use Data::Dumper;
1.465 foxr 497:
498:
1.416 jms 499: # symbolic constants
500: sub SYMB { return 1; }
501: sub URL { return 2; }
502: sub NOTHING { return 3; }
1.174 albertel 503:
1.416 jms 504: # Some data
1.174 albertel 505:
1.416 jms 506: my $resObj = "Apache::lonnavmaps::resource";
1.174 albertel 507:
1.443 foxr 508: # Keep these mappings in sync with lonquickgrades, which usesthe colors
1.416 jms 509: # instead of the icons.
510: my %statusIconMap =
511: (
512: $resObj->CLOSED => '',
513: $resObj->OPEN => 'navmap.open.gif',
514: $resObj->CORRECT => 'navmap.correct.gif',
515: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
516: $resObj->INCORRECT => 'navmap.wrong.gif',
517: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
518: $resObj->ERROR => ''
519: );
1.401 albertel 520:
1.438 wenzelju 521: my %iconAltTags = #texthash does not work here
1.439 wenzelju 522: ( 'navmap.correct.gif' => 'Correct',
523: 'navmap.wrong.gif' => 'Incorrect',
1.462 christia 524: 'navmap.open.gif' => 'Is Open',
1.439 wenzelju 525: 'navmap.partial.gif' => 'Partially Correct',
526: 'navmap.ellipsis.gif' => 'Attempted',
527: );
1.401 albertel 528:
1.416 jms 529: # Defines a status->color mapping, null string means don't color
530: my %colormap =
531: ( $resObj->NETWORK_FAILURE => '',
532: $resObj->CORRECT => '',
533: $resObj->EXCUSED => '#3333FF',
534: $resObj->PAST_DUE_ANSWER_LATER => '',
535: $resObj->PAST_DUE_NO_ANSWER => '',
536: $resObj->ANSWER_OPEN => '#006600',
537: $resObj->OPEN_LATER => '',
538: $resObj->TRIES_LEFT => '',
539: $resObj->INCORRECT => '',
540: $resObj->OPEN => '',
541: $resObj->NOTHING_SET => '',
542: $resObj->ATTEMPTED => '',
1.450 raeburn 543: $resObj->CREDIT_ATTEMPTED => '',
1.416 jms 544: $resObj->ANSWER_SUBMITTED => '',
545: $resObj->PARTIALLY_CORRECT => '#006600'
546: );
547: # And a special case in the nav map; what to do when the assignment
548: # is not yet done and due in less than 24 hours
549: my $hurryUpColor = "#FF0000";
1.174 albertel 550:
1.416 jms 551: sub addToFilter {
552: my $hashIn = shift;
553: my $addition = shift;
554: my %hash = %$hashIn;
555: $hash{$addition} = 1;
1.174 albertel 556:
1.416 jms 557: return join (",", keys(%hash));
558: }
1.174 albertel 559:
1.416 jms 560: sub removeFromFilter {
561: my $hashIn = shift;
562: my $subtraction = shift;
563: my %hash = %$hashIn;
1.174 albertel 564:
1.416 jms 565: delete $hash{$subtraction};
566: return join(",", keys(%hash));
567: }
1.174 albertel 568:
1.416 jms 569: sub getLinkForResource {
570: my $stack = shift;
571: my $res;
1.174 albertel 572:
1.416 jms 573: # Check to see if there are any pages in the stack
574: foreach $res (@$stack) {
575: if (defined($res)) {
576: my $anchor;
577: if ($res->is_page()) {
578: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
579: $anchor=&escape($anchor->shown_symb());
580: return ($res->link(),$res->shown_symb(),$anchor);
581: }
582: # in case folder was skipped over as "only sequence"
583: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
584: if ($map=~/\.page$/) {
585: my $url=&Apache::lonnet::clutter($map);
1.437 foxr 586: $anchor=&escape($res->shown_symb());
1.416 jms 587: return ($url,$res->shown_symb(),$anchor);
588: }
589: }
590: }
1.174 albertel 591:
1.416 jms 592: # Failing that, return the src of the last resource that is defined
593: # (when we first recurse on a map, it puts an undefined resource
594: # on the bottom because $self->{HERE} isn't defined yet, and we
595: # want the src for the map anyhow)
596: foreach my $item (@$stack) {
597: if (defined($item)) { $res = $item; }
598: }
1.174 albertel 599:
1.416 jms 600: if ($res) {
601: return ($res->link(),$res->shown_symb());
602: }
603: return;
604: }
1.174 albertel 605:
1.417 jms 606:
1.140 bowersj2 607:
1.416 jms 608: sub getDescription {
609: my $res = shift;
610: my $part = shift;
611: my $status = $res->status($part);
1.92 bowersj2 612:
1.416 jms 613: my $open = $res->opendate($part);
614: my $due = $res->duedate($part);
615: my $answer = $res->answerdate($part);
1.164 bowersj2 616:
1.416 jms 617: if ($status == $res->NETWORK_FAILURE) {
618: return &mt("Having technical difficulties; please check status later");
619: }
620: if ($status == $res->NOTHING_SET) {
1.494 raeburn 621: return &Apache::lonhtmlcommon::direct_parm_link(&mt('Not currently assigned'),$res->symb(),'opendate',$part);
1.416 jms 622: }
623: if ($status == $res->OPEN_LATER) {
1.467 www 624: return &mt("Open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($open,'start'),$res->symb(),'opendate',$part));
1.416 jms 625: }
1.509 raeburn 626: my $slotinfo;
1.432 raeburn 627: if ($res->simpleStatus($part) == $res->OPEN) {
628: unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
629: my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
1.509 raeburn 630: my $slotmsg;
1.432 raeburn 631: if ($slot_status == $res->UNKNOWN) {
1.509 raeburn 632: $slotmsg = &mt('Reservation status unknown');
1.432 raeburn 633: } elsif ($slot_status == $res->RESERVED) {
1.509 raeburn 634: $slotmsg = &mt('Reserved - ends [_1]',
1.433 bisitz 635: timeToHumanString($slot_time,'end'));
1.432 raeburn 636: } elsif ($slot_status == $res->RESERVED_LOCATION) {
1.509 raeburn 637: $slotmsg = &mt('Reserved - specific location(s) - ends [_1]',
1.433 bisitz 638: timeToHumanString($slot_time,'end'));
1.432 raeburn 639: } elsif ($slot_status == $res->RESERVED_LATER) {
1.509 raeburn 640: $slotmsg = &mt('Reserved - next open [_1]',
1.433 bisitz 641: timeToHumanString($slot_time,'start'));
1.432 raeburn 642: } elsif ($slot_status == $res->RESERVABLE) {
1.509 raeburn 643: $slotmsg = &mt('Reservable, reservations close [_1]',
1.433 bisitz 644: timeToHumanString($slot_time,'end'));
1.432 raeburn 645: } elsif ($slot_status == $res->RESERVABLE_LATER) {
1.509 raeburn 646: $slotmsg = &mt('Reservable, reservations open [_1]',
1.433 bisitz 647: timeToHumanString($slot_time,'start'));
1.432 raeburn 648: } elsif ($slot_status == $res->NOT_IN_A_SLOT) {
1.509 raeburn 649: $slotmsg = &mt('Reserve a time/place to work');
1.432 raeburn 650: } elsif ($slot_status == $res->NOTRESERVABLE) {
1.509 raeburn 651: $slotmsg = &mt('Reservation not available');
1.432 raeburn 652: } elsif ($slot_status == $res->WAITING_FOR_GRADE) {
1.509 raeburn 653: $slotmsg = &mt('Submission in grading queue');
654: }
655: if ($slotmsg) {
656: if ($res->is_task() || !$due) {
657: return $slotmsg;
658: }
659: $slotinfo = (' ' x 2).'('.$slotmsg.')';
1.432 raeburn 660: }
661: }
662: }
1.416 jms 663: if ($status == $res->OPEN) {
664: if ($due) {
665: if ($res->is_practice()) {
1.509 raeburn 666: return &mt("Closes [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'duedate',$part)).$slotinfo;
1.416 jms 667: } else {
1.509 raeburn 668: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)).$slotinfo;
1.416 jms 669: }
670: } else {
1.509 raeburn 671: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Open, no due date"),$res->symb(),'duedate',$part).$slotinfo;
1.416 jms 672: }
673: }
674: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.467 www 675: return &mt("Answer open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($answer,'start'),$res->symb(),'answerdate',$part));
1.416 jms 676: }
677: if ($status == $res->PAST_DUE_NO_ANSWER) {
678: if ($res->is_practice()) {
1.467 www 679: return &mt("Closed [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'answerdate,duedate',$part));
1.416 jms 680: } else {
1.467 www 681: return &mt("Was due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'answerdate,duedate',$part));
1.416 jms 682: }
683: }
684: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
685: && $res->handgrade($part) ne 'yes') {
1.455 www 686: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Answer available"),$res->symb(),'answerdate,duedate',$part);
1.416 jms 687: }
688: if ($status == $res->EXCUSED) {
689: return &mt("Excused by instructor");
690: }
691: if ($status == $res->ATTEMPTED) {
1.444 raeburn 692: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
693: return &mt("Survey submission recorded");
694: } else {
695: return &mt("Answer submitted, not yet graded");
696: }
1.416 jms 697: }
1.450 raeburn 698: if ($status == $res->CREDIT_ATTEMPTED) {
699: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
700: return &mt("Credit for survey submission");
701: }
702: }
1.416 jms 703: if ($status == $res->TRIES_LEFT) {
704: my $tries = $res->tries($part);
705: my $maxtries = $res->maxtries($part);
706: my $triesString = "";
707: if ($tries && $maxtries) {
1.488 bisitz 708: $triesString = '<span class="LC_fontsize_medium"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></span>';
1.416 jms 709: if ($maxtries > 1 && $maxtries - $tries == 1) {
710: $triesString = "<b>$triesString</b>";
711: }
712: }
713: if ($due) {
1.467 www 714: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)) .
1.416 jms 715: " $triesString";
716: } else {
1.455 www 717: return &Apache::lonhtmlcommon::direct_parm_link(&mt("No due date"),$res->symb(),'duedate',$part)." $triesString";
1.416 jms 718: }
719: }
720: if ($status == $res->ANSWER_SUBMITTED) {
721: return &mt('Answer submitted');
722: }
723: }
1.92 bowersj2 724:
1.51 bowersj2 725:
1.416 jms 726: sub dueInLessThan24Hours {
727: my $res = shift;
728: my $part = shift;
729: my $status = $res->status($part);
1.55 bowersj2 730:
1.416 jms 731: return ($status == $res->OPEN() ||
732: $status == $res->TRIES_LEFT()) &&
733: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
734: $res->duedate($part) > time();
735: }
1.84 bowersj2 736:
1.417 jms 737:
1.416 jms 738: sub lastTry {
739: my $res = shift;
740: my $part = shift;
1.115 bowersj2 741:
1.416 jms 742: my $tries = $res->tries($part);
743: my $maxtries = $res->maxtries($part);
744: return $tries && $maxtries && $maxtries > 1 &&
745: $maxtries - $tries == 1 && $res->duedate($part) &&
746: $res->duedate($part) > time();
747: }
1.55 bowersj2 748:
1.51 bowersj2 749:
1.416 jms 750: sub advancedUser {
751: return $env{'request.role.adv'};
752: }
1.51 bowersj2 753:
1.416 jms 754: sub timeToHumanString {
755: my ($time,$type,$format) = @_;
1.153 bowersj2 756:
1.416 jms 757: # zero, '0' and blank are bad times
758: if (!$time) {
759: return &mt('never');
760: }
761: unless (&Apache::lonlocal::current_language()=~/^en/) {
762: return &Apache::lonlocal::locallocaltime($time);
763: }
764: my $now = time();
1.174 albertel 765:
1.416 jms 766: # Positive = future
767: my $delta = $time - $now;
1.190 bowersj2 768:
1.416 jms 769: my $minute = 60;
770: my $hour = 60 * $minute;
771: my $day = 24 * $hour;
772: my $week = 7 * $day;
773: my $inPast = 0;
1.190 bowersj2 774:
1.416 jms 775: # Logic in comments:
776: # Is it now? (extremely unlikely)
777: if ( $delta == 0 ) {
778: return "this instant";
779: }
1.174 albertel 780:
1.416 jms 781: if ($delta < 0) {
782: $inPast = 1;
783: $delta = -$delta;
784: }
1.143 bowersj2 785:
1.416 jms 786: if ( $delta > 0 ) {
1.51 bowersj2 787:
1.416 jms 788: my $tense = $inPast ? " ago" : "";
789: my $prefix = $inPast ? "" : "in ";
790:
791: # Less than a minute
792: if ( $delta < $minute ) {
793: if ($delta == 1) { return "${prefix}1 second$tense"; }
794: return "$prefix$delta seconds$tense";
795: }
1.51 bowersj2 796:
1.416 jms 797: # Less than an hour
798: if ( $delta < $hour ) {
1.464 raeburn 799: # If so, use minutes; or minutes, seconds (if format requires)
1.416 jms 800: my $minutes = floor($delta / 60);
1.464 raeburn 801: if (($format ne '') && ($format =~ /\%(T|S)/)) {
802: my $display;
803: if ($minutes == 1) {
804: $display = "${prefix}1 minute";
805: } else {
806: $display = "$prefix$minutes minutes";
807: }
808: my $seconds = $delta % $minute;
809: if ($seconds == 0) {
810: $display .= $tense;
811: } elsif ($seconds == 1) {
812: $display .= ", 1 second$tense";
813: } else {
814: $display .= ", $seconds seconds$tense";
815: }
816: return $display;
817: }
1.416 jms 818: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
819: return "$prefix$minutes minutes$tense";
820: }
821:
822: # Is it less than 24 hours away? If so,
1.464 raeburn 823: # display hours + minutes, (and + seconds, if format specified it)
1.416 jms 824: if ( $delta < $hour * 24) {
825: my $hours = floor($delta / $hour);
826: my $minutes = floor(($delta % $hour) / $minute);
827: my $hourString = "$hours hours";
828: my $minuteString = ", $minutes minutes";
829: if ($hours == 1) {
830: $hourString = "1 hour";
831: }
832: if ($minutes == 1) {
833: $minuteString = ", 1 minute";
834: }
835: if ($minutes == 0) {
836: $minuteString = "";
837: }
1.464 raeburn 838: if (($format ne '') && ($format =~ /\%(T|S)/)) {
839: my $display = "$prefix$hourString$minuteString";
840: my $seconds = $delta-(($hours * $hour)+($minutes * $minute));
841: if ($seconds == 0) {
842: $display .= $tense;
843: } elsif ($seconds == 1) {
844: $display .= ", 1 second$tense";
845: } else {
846: $display .= ", $seconds seconds$tense";
847: }
848: return $display;
849: }
1.416 jms 850: return "$prefix$hourString$minuteString$tense";
851: }
1.174 albertel 852:
1.464 raeburn 853: # Date/time is more than 24 hours away
854:
1.416 jms 855: my $dt = DateTime->from_epoch(epoch => $time)
856: ->set_time_zone(&Apache::lonlocal::gettimezone());
1.216 bowersj2 857:
1.464 raeburn 858: # If there's a caller supplied format, use it, unless it only displays
859: # H:M:S or H:M.
1.145 bowersj2 860:
1.464 raeburn 861: if (($format ne '') && ($format ne '%T') && ($format ne '%R')) {
1.416 jms 862: my $timeStr = $dt->strftime($format);
863: return $timeStr.' ('.$dt->time_zone_short_name().')';
864: }
1.216 bowersj2 865:
1.416 jms 866: # Less than 5 days away, display day of the week and
867: # HH:MM
1.216 bowersj2 868:
1.416 jms 869: if ( $delta < $day * 5 ) {
870: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
871: $timeStr =~ s/12:00 am/00:00/;
872: $timeStr =~ s/12:00 pm/noon/;
873: return ($inPast ? "last " : "this ") .
874: $timeStr;
875: }
876:
877: my $conjunction='on';
878: if ($type eq 'start') {
879: $conjunction='at';
880: } elsif ($type eq 'end') {
881: $conjunction='by';
882: }
883: # Is it this year?
884: my $dt_now = DateTime->from_epoch(epoch => $now)
885: ->set_time_zone(&Apache::lonlocal::gettimezone());
886: if ( $dt->year() == $dt_now->year()) {
887: # Return on Month Day, HH:MM meridian
888: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
889: $timeStr =~ s/12:00 am/00:00/;
890: $timeStr =~ s/12:00 pm/noon/;
891: return $timeStr;
892: }
1.59 bowersj2 893:
1.416 jms 894: # Not this year, so show the year
895: my $timeStr =
896: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
897: $timeStr =~ s/12:00 am/00:00/;
898: $timeStr =~ s/12:00 pm/noon/;
899: return $timeStr;
900: }
901: }
1.59 bowersj2 902:
903:
1.133 bowersj2 904: sub resource { return 0; }
905: sub communication_status { return 1; }
906: sub quick_status { return 2; }
907: sub long_status { return 3; }
1.225 bowersj2 908: sub part_status_summary { return 4; }
1.51 bowersj2 909:
1.133 bowersj2 910: sub render_resource {
911: my ($resource, $part, $params) = @_;
1.51 bowersj2 912:
1.477 raeburn 913: my $editmapLink;
1.133 bowersj2 914: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 915:
1.134 bowersj2 916: my $link = $params->{"resourceLink"};
1.512 raeburn 917: if ($resource->ext()) {
918: $link =~ s/\#.+(\?)/$1/g;
919: }
1.306 foxr 920:
921: # The URL part is not escaped at this point, but the symb is...
922:
1.134 bowersj2 923: my $src = $resource->src();
924: my $it = $params->{"iterator"};
1.133 bowersj2 925: my $filter = $it->{FILTER};
926:
927: my $title = $resource->compTitle();
1.258 albertel 928:
1.133 bowersj2 929: my $partLabel = "";
930: my $newBranchText = "";
1.298 albertel 931: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
1.133 bowersj2 932: # If this is a new branch, label it so
933: if ($params->{'isNewBranch'}) {
1.429 droeschl 934: $newBranchText = "<img src='$location/branch.gif' alt=".mt('Branch')." />";
1.51 bowersj2 935: }
936:
1.133 bowersj2 937: # links to open and close the folder
1.306 foxr 938:
1.427 droeschl 939: my $whitespace = $location.'/whitespace_21.gif';
940: my $linkopen = "<img src='$whitespace' alt='' />"."<a href=\"$link\">";
1.133 bowersj2 941: my $linkclose = "</a>";
1.51 bowersj2 942:
1.204 albertel 943: # Default icon: unknown page
1.426 droeschl 944: my $icon = "<img class=\"LC_contentImage\" src='$location/unknown.gif' alt='' />";
1.133 bowersj2 945:
946: if ($resource->is_problem()) {
1.192 bowersj2 947: if ($part eq '0' || $params->{'condensed'}) {
1.426 droeschl 948: $icon = '<img class="LC_contentImage" src="'.$location.'/';
1.389 albertel 949: if ($resource->is_task()) {
950: $icon .= 'task.gif" alt="'.&mt('Task');
951: } else {
952: $icon .= 'problem.gif" alt="'.&mt('Problem');
953: }
1.426 droeschl 954: $icon .='" />';
1.133 bowersj2 955: } else {
956: $icon = $params->{'indentString'};
957: }
1.204 albertel 958: } else {
1.426 droeschl 959: $icon = "<img class=\"LC_contentImage\" src='".&Apache::loncommon::icon($resource->src)."' alt='' />";
1.133 bowersj2 960: }
1.51 bowersj2 961:
1.133 bowersj2 962: # Display the correct map icon to open or shut map
963: if ($resource->is_map()) {
964: my $mapId = $resource->map_pc();
965: my $nowOpen = !defined($filter->{$mapId});
966: if ($it->{CONDITION}) {
967: $nowOpen = !$nowOpen;
968: }
1.426 droeschl 969:
1.205 bowersj2 970: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1.362 www 971: my $title=$resource->title;
1.426 droeschl 972: $title=~s/\"/\&qout;/g;
1.144 bowersj2 973: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 974: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.426 droeschl 975: $icon = "<img src='$location/arrow." . ($nowOpen ? 'closed' : 'open') . ".gif' alt='' />"
976: ."<img class=\"LC_contentImage\" src='$location/$icon' alt=\""
977: .($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1.349 foxr 978: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1.392 albertel 979: $params->{'queryString'} . '&filter=';
1.144 bowersj2 980: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
981: addToFilter($filter, $mapId) :
982: removeFromFilter($filter, $mapId);
1.392 albertel 983: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
984: . $params->{'hereType'} . '&here=' .
1.384 www 985: &escape($params->{'here'}) .
1.392 albertel 986: '&jump=' .
1.384 www 987: &escape($resource->symb()) .
1.392 albertel 988: "&folderManip=1\">";
1.306 foxr 989:
1.144 bowersj2 990: } else {
991: # Don't allow users to manipulate folder
1.426 droeschl 992: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.427 droeschl 993: $icon = "<img class=\"LC_space\" src='$whitespace' alt='' />"."<img class=\"LC_contentImage\" src='$location/$icon' alt=\"".($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1.144 bowersj2 994:
995: $linkopen = "";
996: $linkclose = "";
997: }
1.477 raeburn 998: if ((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
999: ($resource->symb=~/\_\_\_[^\_]+\_\_\_uploaded/)) {
1.493 raeburn 1000: if (!$params->{'map_no_edit_link'}) {
1001: my $icon = &Apache::loncommon::lonhttpdurl('/res/adm/pages').'/editmap.png';
1002: $editmapLink=' '.
1.495 raeburn 1003: '<a href="/adm/coursedocs?command=directnav&symb='.&escape($resource->symb()).'">'.
1.477 raeburn 1004: '<img src="'.$icon.'" alt="'.&mt('Edit Content').'" title="'.&mt('Edit Content').'" />'.
1005: '</a>';
1.493 raeburn 1006: }
1.477 raeburn 1007: }
1.518 raeburn 1008: if ($params->{'mapHidden'} || $resource->randomout()) {
1009: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1010: }
1011: } else {
1012: if ($resource->randomout()) {
1013: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1014: }
1.133 bowersj2 1015: }
1.342 albertel 1016: if (!$resource->condval()) {
1.458 bisitz 1017: $nonLinkedText .= ' <span class="LC_info">('.&mt('conditionally hidden').')</span> ';
1.342 albertel 1018: }
1.413 www 1019: if (($resource->is_practice()) && ($resource->is_raw_problem())) {
1.488 bisitz 1020: $nonLinkedText .=' <span class="LC_info"><b>'.&mt('not graded').'</b></span>';
1.412 www 1021: }
1.426 droeschl 1022:
1.133 bowersj2 1023: # We're done preparing and finally ready to start the rendering
1.426 droeschl 1024: my $result = '<td class="LC_middle">';
1025: my $newfolderType = $resource->is_sequence() ? 'folder' : 'page';
1026:
1.140 bowersj2 1027: my $indentLevel = $params->{'indentLevel'};
1028: if ($newBranchText) { $indentLevel--; }
1029:
1.133 bowersj2 1030: # print indentation
1.140 bowersj2 1031: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 1032: $result .= $params->{'indentString'};
1.84 bowersj2 1033: }
1034:
1.133 bowersj2 1035: # Decide what to display
1036: $result .= "$newBranchText$linkopen$icon$linkclose";
1037:
1038: my $curMarkerBegin = '';
1039: my $curMarkerEnd = '';
1.51 bowersj2 1040:
1.133 bowersj2 1041: # Is this the current resource?
1.158 bowersj2 1042: if (!$params->{'displayedHereMarker'} &&
1043: $resource->symb() eq $params->{'here'} ) {
1.477 raeburn 1044: unless ($resource->is_map()) {
1045: $curMarkerBegin = '<span class="LC_current_nav_location">';
1046: $curMarkerEnd = '</span>';
1047: }
1.424 schulted 1048: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 1049: }
1050:
1.192 bowersj2 1051: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 1052: !$params->{'condensed'}) {
1.274 matthew 1053: my $displaypart=$resource->part_display($part);
1.363 albertel 1054: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1.384 www 1055: if ($link!~/\#/) { $link.='#'.&escape($part); }
1.133 bowersj2 1056: $title = "";
1.51 bowersj2 1057: }
1058:
1.163 bowersj2 1059: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.363 albertel 1060: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1.51 bowersj2 1061: }
1062:
1.266 raeburn 1063: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.490 raeburn 1064: $result .= "$curMarkerBegin<a href=\"$link\">$title$partLabel</a>$curMarkerEnd$editmapLink$nonLinkedText</td>";
1.144 bowersj2 1065: } else {
1.477 raeburn 1066: $result .= "$curMarkerBegin$linkopen$title$partLabel</a>$curMarkerEnd$editmapLink$nonLinkedText</td>";
1.144 bowersj2 1067: }
1.51 bowersj2 1068:
1.133 bowersj2 1069: return $result;
1070: }
1.51 bowersj2 1071:
1.133 bowersj2 1072: sub render_communication_status {
1073: my ($resource, $part, $params) = @_;
1.134 bowersj2 1074: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1075:
1076: my $link = $params->{"resourceLink"};
1.445 droeschl 1077: my $linkopen = "<a href=\"$link\">";
1.134 bowersj2 1078: my $linkclose = "</a>";
1.298 albertel 1079: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.477 raeburn 1080:
1.134 bowersj2 1081: if ($resource->hasDiscussion()) {
1082: $discussionHTML = $linkopen .
1.442 wenzelju 1083: '<img alt="'.&mt('New Discussion').'" src="'.$location.'/chat.gif" title="'.&mt('New Discussion').'"/>' .
1.134 bowersj2 1084: $linkclose;
1085: }
1086:
1087: if ($resource->getFeedback()) {
1088: my $feedback = $resource->getFeedback();
1.394 raeburn 1089: foreach my $msgid (split(/\,/, $feedback)) {
1090: if ($msgid) {
1.445 droeschl 1091: $feedbackHTML .= ' <a href="/adm/email?display='
1.394 raeburn 1092: . &escape($msgid) . '">'
1.442 wenzelju 1093: . '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" title="'.&mt('New E-mail').'"/></a>';
1.134 bowersj2 1094: }
1095: }
1096: }
1097:
1098: if ($resource->getErrors()) {
1099: my $errors = $resource->getErrors();
1.254 matthew 1100: my $errorcount = 0;
1.394 raeburn 1101: foreach my $msgid (split(/,/, $errors)) {
1.254 matthew 1102: last if ($errorcount>=10); # Only output 10 bombs maximum
1.394 raeburn 1103: if ($msgid) {
1.254 matthew 1104: $errorcount++;
1.445 droeschl 1105: $errorHTML .= ' <a href="/adm/email?display='
1.394 raeburn 1106: . &escape($msgid) . '">'
1.442 wenzelju 1107: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" title="'.&mt('New Error').'"/></a>';
1.134 bowersj2 1108: }
1109: }
1.197 bowersj2 1110: }
1111:
1112: if ($params->{'multipart'} && $part != '0') {
1113: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 1114: }
1.426 droeschl 1115: return "<td class=\"LC_middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1.134 bowersj2 1116:
1.133 bowersj2 1117: }
1118: sub render_quick_status {
1119: my ($resource, $part, $params) = @_;
1.135 bowersj2 1120: my $result = "";
1121: my $firstDisplayed = !$params->{'condensed'} &&
1122: $params->{'multipart'} && $part eq "0";
1123:
1124: my $link = $params->{"resourceLink"};
1.445 droeschl 1125: my $linkopen = "<a href=\"$link\">";
1.135 bowersj2 1126: my $linkclose = "</a>";
1.426 droeschl 1127:
1128: $result .= '<td class="LC_middle">';
1.135 bowersj2 1129: if ($resource->is_problem() &&
1130: !$firstDisplayed) {
1.224 bowersj2 1131: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 1132: my $alt = $iconAltTags{$icon};
1133: if ($icon) {
1.298 albertel 1134: my $location=
1135: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1.438 wenzelju 1136: $result .= $linkopen.'<img src="'.$location.'" alt="'.&mt($alt).'" title="'.&mt($alt).'" />'.$linkclose;
1.135 bowersj2 1137: } else {
1.426 droeschl 1138: $result .= " ";
1.135 bowersj2 1139: }
1140: } else { # not problem, no icon
1.426 droeschl 1141: $result .= " ";
1.135 bowersj2 1142: }
1.426 droeschl 1143: $result .= "</td>\n";
1.135 bowersj2 1144: return $result;
1.133 bowersj2 1145: }
1146: sub render_long_status {
1147: my ($resource, $part, $params) = @_;
1.426 droeschl 1148: my $result = '<td class="LC_middle LC_right">';
1.136 bowersj2 1149: my $firstDisplayed = !$params->{'condensed'} &&
1150: $params->{'multipart'} && $part eq "0";
1151:
1152: my $color;
1.488 bisitz 1153: my $info = '';
1.402 albertel 1154: if ($resource->is_problem() || $resource->is_practice()) {
1.136 bowersj2 1155: $color = $colormap{$resource->status};
1.502 raeburn 1156:
1157: if (dueInLessThan24Hours($resource, $part)) {
1.136 bowersj2 1158: $color = $hurryUpColor;
1.488 bisitz 1159: $info = ' title="'.&mt('Due in less than 24 hours!').'"';
1.502 raeburn 1160: } elsif (lastTry($resource, $part)) {
1161: unless (($resource->problemstatus($part) eq 'no') ||
1162: ($resource->problemstatus($part) eq 'no_feedback_ever')) {
1163: $color = $hurryUpColor;
1164: $info = ' title="'.&mt('One try remaining!').'"';
1165: }
1166: }
1.136 bowersj2 1167: }
1168:
1.463 raeburn 1169: if ($resource->kind() eq "res" &&
1170: $resource->is_raw_problem() &&
1171: !$firstDisplayed) {
1.488 bisitz 1172: if ($color) {$result .= '<span style="color:'.$color.'"'.$info.'><b>'; }
1.136 bowersj2 1173: $result .= getDescription($resource, $part);
1.488 bisitz 1174: if ($color) {$result .= "</b></span>"; }
1.136 bowersj2 1175: }
1.402 albertel 1176: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1.400 albertel 1177: $result .= &mt('(randomly select [_1])', $resource->randompick());
1178: }
1179: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1180: $result .= &mt('(randomly ordered)');
1.136 bowersj2 1181: }
1.210 bowersj2 1182:
1.213 bowersj2 1183: # Debugging code
1184: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1185: # ' - Part: ' . $part;
1186:
1.210 bowersj2 1187: $result .= "</td>\n";
1.136 bowersj2 1188:
1189: return $result;
1.51 bowersj2 1190: }
1191:
1.227 bowersj2 1192: # Colors obtained by taking the icons, matching the colors, and
1193: # possibly reducing the Value (HSV) of the color, if it's too bright
1194: # for text, generally by one third or so.
1.225 bowersj2 1195: my %statusColors =
1196: (
1197: $resObj->CLOSED => '#000000',
1.227 bowersj2 1198: $resObj->OPEN => '#998b13',
1199: $resObj->CORRECT => '#26933f',
1200: $resObj->INCORRECT => '#c48207',
1201: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1202: $resObj->ERROR => '#000000'
1203: );
1204: my %statusStrings =
1205: (
1206: $resObj->CLOSED => 'Not yet open',
1207: $resObj->OPEN => 'Open',
1208: $resObj->CORRECT => 'Correct',
1209: $resObj->INCORRECT => 'Incorrect',
1210: $resObj->ATTEMPTED => 'Attempted',
1211: $resObj->ERROR => 'Network Error'
1212: );
1213: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1214:
1215: sub render_parts_summary_status {
1216: my ($resource, $part, $params) = @_;
1.256 albertel 1217: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1218: if ($params->{showParts}) {
1219: return '<td></td>';
1220: }
1221:
1222: my $td = "<td align='right'>\n";
1223: my $endtd = "</td>\n";
1.256 albertel 1224: my @probs;
1.225 bowersj2 1225:
1.256 albertel 1226: if ($resource->contains_problem) {
1227: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1228: } else {
1229: @probs=($resource);
1230: }
1231: my $return;
1232: my %overallstatus;
1233: my $totalParts;
1234: foreach my $resource (@probs) {
1235: # If there is a single part, just show the simple status
1236: if ($resource->singlepart()) {
1237: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1238: $overallstatus{$status}++;
1239: $totalParts++;
1240: next;
1241: }
1242: # Now we can be sure the $part doesn't really matter.
1243: my $statusCount = $resource->simpleStatusCount();
1244: my @counts;
1245: foreach my $status (@statuses) {
1246: # decouple display order from the simpleStatusCount order
1247: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1248: if ($statusCount->[$slot]) {
1249: $overallstatus{$status}+=$statusCount->[$slot];
1250: $totalParts+=$statusCount->[$slot];
1251: }
1252: }
1253: }
1254: $return.= $td . $totalParts . ' parts: ';
1255: foreach my $status (@statuses) {
1.488 bisitz 1256: if ($overallstatus{$status}) {
1257: $return.='<span style="color:' . $statusColors{$status}
1258: . '">' . $overallstatus{$status} . ' '
1259: . $statusStrings{$status} . '</span>';
1260: }
1.225 bowersj2 1261: }
1.256 albertel 1262: $return.= $endtd;
1263: return $return;
1.225 bowersj2 1264: }
1265:
1.133 bowersj2 1266: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1267: \&render_quick_status, \&render_long_status,
1268: \&render_parts_summary_status);
1.132 bowersj2 1269:
1270: sub setDefault {
1271: my ($val, $default) = @_;
1272: if (!defined($val)) { return $default; }
1273: return $val;
1274: }
1275:
1.296 albertel 1276: sub cmp_title {
1277: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1278: $atitle=~s/^\s*//;
1279: $btitle=~s/^\s*//;
1280: return $atitle cmp $btitle;
1281: }
1282:
1.132 bowersj2 1283: sub render {
1284: my $args = shift;
1.140 bowersj2 1285: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1286: my $result = '';
1.132 bowersj2 1287: # Configure the renderer.
1288: my $cols = $args->{'cols'};
1289: if (!defined($cols)) {
1290: # no columns, no nav maps.
1291: return '';
1292: }
1.140 bowersj2 1293: my $navmap;
1294: if (defined($args->{'navmap'})) {
1295: $navmap = $args->{'navmap'};
1296: }
1297:
1.158 bowersj2 1298: my $r = $args->{'r'};
1.140 bowersj2 1299: my $queryString = $args->{'queryString'};
1.159 bowersj2 1300: my $jump = $args->{'jump'};
1.158 bowersj2 1301: my $here = $args->{'here'};
1.153 bowersj2 1302: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1303: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1304: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1305: # before the current resource when using #current
1306:
1307: # If we were passed 'here' information, we are not rendering
1308: # after a folder manipulation, and we were not passed an
1309: # iterator, make sure we open the folders to show the "here"
1310: # marker
1311: my $filterHash = {};
1312: # Figure out what we're not displaying
1.394 raeburn 1313: foreach my $item (split(/\,/, $env{"form.filter"})) {
1314: if ($item) {
1315: $filterHash->{$item} = "1";
1.140 bowersj2 1316: }
1317: }
1318:
1.191 bowersj2 1319: # Filter: Remember filter function and add our own filter: Refuse
1320: # to show hidden resources unless the user can see them.
1321: my $userCanSeeHidden = advancedUser();
1322: my $filterFunc = setDefault($args->{'filterFunc'},
1323: sub {return 1;});
1324: if (!$userCanSeeHidden) {
1325: # Without renaming the filterfunc, the server seems to go into
1326: # an infinite loop
1327: my $oldFilterFunc = $filterFunc;
1328: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1329: &$oldFilterFunc($res);};
1330: }
1331:
1.140 bowersj2 1332: my $condition = 0;
1.320 albertel 1333: if ($env{'form.condition'}) {
1.140 bowersj2 1334: $condition = 1;
1335: }
1336:
1.320 albertel 1337: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1.140 bowersj2 1338: # Step 1: Check to see if we have a navmap
1339: if (!defined($navmap)) {
1.221 bowersj2 1340: $navmap = Apache::lonnavmaps::navmap->new();
1.340 albertel 1341: if (!defined($navmap)) {
1.423 raeburn 1342: # no longer in course
1.388 albertel 1343: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1.362 www 1344: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1.340 albertel 1345: }
1346: }
1.140 bowersj2 1347:
1348: # Step two: Locate what kind of here marker is necessary
1349: # Determine where the "here" marker is and where the screen jumps to.
1350:
1.332 albertel 1351: if ($env{'form.postsymb'} ne '') {
1.320 albertel 1352: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1.332 albertel 1353: } elsif ($env{'form.postdata'} ne '') {
1.140 bowersj2 1354: # couldn't find a symb, is there a URL?
1.320 albertel 1355: my $currenturl = $env{'form.postdata'};
1.158 bowersj2 1356: #$currenturl=~s/^http\:\/\///;
1357: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1358:
1.158 bowersj2 1359: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.331 albertel 1360: }
1361: if ($here eq '') {
1.317 albertel 1362: my $last;
1.320 albertel 1363: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1.317 albertel 1364: &GDBM_READER(),0640)) {
1365: $last=$hash{'last_known'};
1366: untie(%hash);
1367: }
1368: if ($last) { $here = $jump = $last; }
1369: }
1.158 bowersj2 1370:
1.140 bowersj2 1371: # Step three: Ensure the folders are open
1372: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1373: my $curRes;
1.140 bowersj2 1374: my $found = 0;
1375:
1376: # We only need to do this if we need to open the maps to show the
1377: # current position. This will change the counter so we can't count
1378: # for the jump marker with this loop.
1.294 albertel 1379: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1380: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1381: my $mapStack = $mapIterator->getStack();
1382:
1383: # Ensure the parent maps are open
1384: for my $map (@{$mapStack}) {
1385: if ($condition) {
1386: undef $filterHash->{$map->map_pc()};
1387: } else {
1388: $filterHash->{$map->map_pc()} = 1;
1389: }
1390: }
1391: $found = 1;
1392: }
1393: }
1.159 bowersj2 1394: }
1.140 bowersj2 1395:
1.320 albertel 1396: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1.140 bowersj2 1397: # If this is a click on a folder or something, we want to preserve the "here"
1398: # from the querystring, and get the new "jump" marker
1.320 albertel 1399: $here = $env{'form.here'};
1400: $jump = $env{'form.jump'};
1.140 bowersj2 1401: }
1402:
1.132 bowersj2 1403: my $it = $args->{'iterator'};
1404: if (!defined($it)) {
1.320 albertel 1405: # Construct a default iterator based on $env{'form.'} information
1.140 bowersj2 1406:
1407: # Step 1: Check to see if we have a navmap
1408: if (!defined($navmap)) {
1.221 bowersj2 1409: $navmap = Apache::lonnavmaps::navmap->new();
1.423 raeburn 1410: if (!defined($navmap)) {
1411: # no longer in course
1412: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1413: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1414: }
1.140 bowersj2 1415: }
1416:
1.144 bowersj2 1417: # See if we're being passed a specific map
1418: if ($args->{'iterator_map'}) {
1419: my $map = $args->{'iterator_map'};
1.145 bowersj2 1420: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1421: my $firstResource = $map->map_start();
1422: my $finishResource = $map->map_finish();
1423:
1424: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1425: } else {
1.401 albertel 1426: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1.144 bowersj2 1427: }
1.132 bowersj2 1428: }
1.256 albertel 1429:
1.159 bowersj2 1430: # (re-)Locate the jump point, if any
1.191 bowersj2 1431: # Note this does not take filtering or hidden into account... need
1432: # to be fixed?
1.159 bowersj2 1433: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1434: my $curRes;
1.159 bowersj2 1435: my $foundJump = 0;
1436: my $counter = 0;
1437:
1.222 bowersj2 1438: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1439: if (ref($curRes)) { $counter++; }
1440:
1441: if (ref($curRes) && $jump eq $curRes->symb()) {
1442:
1443: # This is why we have to use the main iterator instead of the
1444: # potentially faster DFS: The count has to be the same, so
1445: # the order has to be the same, which DFS won't give us.
1446: $args->{'currentJumpIndex'} = $counter;
1447: $foundJump = 1;
1448: }
1449: }
1450:
1.132 bowersj2 1451: my $showParts = setDefault($args->{'showParts'}, 1);
1452: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1453: # keeps track of when the current resource is found,
1454: # so we can back up a few and put the anchor above the
1455: # current resource
1.140 bowersj2 1456: my $printKey = $args->{'printKey'};
1457: my $printCloseAll = $args->{'printCloseAll'};
1458: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.425 schulted 1459:
1.140 bowersj2 1460: # Print key?
1461: if ($printKey) {
1462: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1463: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1.298 albertel 1464: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.140 bowersj2 1465: if ($navmap->{LAST_CHECK}) {
1466: $result .=
1.434 bisitz 1467: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('New discussion since').' '.
1.140 bowersj2 1468: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1469: '</td><td align="center" valign="bottom"> '.
1.434 bisitz 1470: '<img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1471: '</td>';
1472: } else {
1473: $result .= '<td align="center" valign="bottom"> '.
1.434 bisitz 1474: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1475: ' <img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').
1.140 bowersj2 1476: '</td>';
1477: }
1478:
1479: $result .= '</tr></table>';
1480: }
1481:
1.172 bowersj2 1482: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1483: my ($link,$text);
1.140 bowersj2 1484: if ($condition) {
1.446 raeburn 1485: $link='navmaps?condition=0&filter=&'.$queryString.
1.449 bisitz 1486: '&here='.&escape($here);
1.377 www 1487: $text='Close all folders';
1.140 bowersj2 1488: } else {
1.446 raeburn 1489: $link='navmaps?condition=1&filter=&'.$queryString.
1.449 bisitz 1490: '&here='.&escape($here);
1.377 www 1491: $text='Open all folders';
1.281 albertel 1492: }
1.446 raeburn 1493: if ($env{'form.register'}) {
1494: $link .= '&register='.$env{'form.register'};
1495: }
1.281 albertel 1496: if ($args->{'caller'} eq 'navmapsdisplay') {
1.478 raeburn 1497: unless ($args->{'notools'}) {
1498: &add_linkitem($args->{'linkitems'},'changefolder',
1499: "location.href='$link'",$text);
1500: }
1.281 albertel 1501: } else {
1.446 raeburn 1502: $result.= '<a href="'.$link.'">'.&mt($text).'</a>';
1.281 albertel 1503: }
1.266 raeburn 1504: $result .= "\n";
1505: }
1.140 bowersj2 1506:
1.266 raeburn 1507: # Check for any unread discussions in all resources.
1.478 raeburn 1508: if (($args->{'caller'} eq 'navmapsdisplay') && (!$args->{'notools'})) {
1.296 albertel 1509: &add_linkitem($args->{'linkitems'},'clearbubbles',
1510: 'document.clearbubbles.submit()',
1511: 'Mark all posts read');
1.297 albertel 1512: my $time=time;
1.486 raeburn 1513: my $querystr = &HTML::Entities::encode($ENV{'QUERY_STRING'},'<>&"');
1.296 albertel 1514: $result .= (<<END);
1515: <form name="clearbubbles" method="post" action="/adm/feedback">
1.486 raeburn 1516: <input type="hidden" name="navurl" value="$querystr" />
1.297 albertel 1517: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1518: END
1.446 raeburn 1519: if ($env{'form.register'}) {
1520: $result .= '<input type="hidden" name="register" value="'.$env{'form.register'}.'" />';
1521: }
1.296 albertel 1522: if ($args->{'sort'} eq 'discussion') {
1523: my $totdisc = 0;
1524: my $haveDisc = '';
1525: my @allres=$navmap->retrieveResources();
1526: foreach my $resource (@allres) {
1527: if ($resource->hasDiscussion()) {
1.323 albertel 1528: $haveDisc .= $resource->wrap_symb().':';
1.296 albertel 1529: $totdisc ++;
1.267 albertel 1530: }
1531: }
1.296 albertel 1532: if ($totdisc > 0) {
1533: $haveDisc =~ s/:$//;
1534: $result .= (<<END);
1535: <input type="hidden" name="navmaps" value="$haveDisc" />
1536: </form>
1537: END
1538: }
1.297 albertel 1539: }
1540: $result.='</form>';
1.478 raeburn 1541: }
1542: if (($args->{'caller'} eq 'navmapsdisplay') &&
1543: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1544: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1545: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1546: if ($env{'course.'.$env{'request.course.id'}.'.url'} eq
1547: "uploaded/$cdom/$cnum/default.sequence") {
1548: &add_linkitem($args->{'linkitems'},'edittoplevel',
1549: "javascript:gocmd('/adm/coursedocs','editdocs');",
1550: 'Content Editor');
1.475 raeburn 1551: }
1.266 raeburn 1552: }
1.276 albertel 1553:
1.281 albertel 1554: if ($args->{'caller'} eq 'navmapsdisplay') {
1.476 raeburn 1555: $result .= &show_linkitems_toolbar($args,$condition);
1.281 albertel 1556: } elsif ($args->{'sort_html'}) {
1557: $result.=$args->{'sort_html'};
1558: }
1.276 albertel 1559:
1.425 schulted 1560: #$result .= "<br />\n";
1.140 bowersj2 1561: if ($r) {
1562: $r->print($result);
1563: $r->rflush();
1564: $result = "";
1565: }
1.132 bowersj2 1566: # End parameter setting
1.425 schulted 1567:
1568: $result .= "<br />\n";
1569:
1.132 bowersj2 1570: # Data
1.431 schulted 1571: $result.=&Apache::loncommon::start_data_table("LC_tableOfContent");
1.426 droeschl 1572:
1.132 bowersj2 1573: my $res = "Apache::lonnavmaps::resource";
1574: my %condenseStatuses =
1575: ( $res->NETWORK_FAILURE => 1,
1576: $res->NOTHING_SET => 1,
1577: $res->CORRECT => 1 );
1.133 bowersj2 1578:
1579: # Shared variables
1580: $args->{'counter'} = 0; # counts the rows
1581: $args->{'indentLevel'} = 0;
1582: $args->{'isNewBranch'} = 0;
1.426 droeschl 1583: $args->{'condensed'} = 0;
1584:
1.428 droeschl 1585: my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
1.426 droeschl 1586: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' alt='' />");
1.133 bowersj2 1587: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1588:
1.518 raeburn 1589: # If we're suppressing empty sequences, look for them here.
1590: # We also do this even if $args->{'suppressEmptySequences'}
1591: # is not true, so we can hide empty sequences for which the
1592: # hiddenresource parameter is set to yes (at map level), or
1593: # mark as hidden for users who have $userCanSeeHidden.
1594: # Use DFS for speed, since structure actually doesn't matter,
1595: # except what map has what resources.
1596:
1597: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1598: $it->{FIRST_RESOURCE},
1599: $it->{FINISH_RESOURCE},
1600: {}, undef, 1);
1601: my $depth = 0;
1602: $dfsit->next();
1603: my $curRes = $dfsit->next();
1604: while ($depth > -1) {
1605: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1606: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1607:
1608: if (ref($curRes)) {
1609: # Parallel pre-processing: Do sequences have non-filtered-out children?
1610: if ($curRes->is_map()) {
1611: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1612: # Sequences themselves do not count as visible children,
1613: # unless those sequences also have visible children.
1614: # This means if a sequence appears, there's a "promise"
1615: # that there's something under it if you open it, somewhere.
1616: } elsif ($curRes->src()) {
1617: # Not a sequence: if it's filtered, ignore it, otherwise
1618: # rise up the stack and mark the sequences as having children
1619: if (&$filterFunc($curRes)) {
1620: for my $sequence (@{$dfsit->getStack()}) {
1621: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1.190 bowersj2 1622: }
1623: }
1624: }
1625: }
1.518 raeburn 1626: } continue {
1627: $curRes = $dfsit->next();
1.190 bowersj2 1628: }
1629:
1.133 bowersj2 1630: my $displayedJumpMarker = 0;
1.132 bowersj2 1631: # Set up iteration.
1632: my $now = time();
1633: my $in24Hours = $now + 24 * 60 * 60;
1634: my $rownum = 0;
1635:
1.141 bowersj2 1636: # export "here" marker information
1637: $args->{'here'} = $here;
1638:
1.222 bowersj2 1639: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1640: my @resources;
1641: my $code='';# sub { !(shift->is_map();) };
1642: if ($args->{'sort'} eq 'title') {
1.276 albertel 1643: my $oldFilterFunc = $filterFunc;
1644: my $filterFunc=
1645: sub {
1646: my ($res)=@_;
1647: if ($res->is_map()) { return 0;}
1648: return &$oldFilterFunc($res);
1649: };
1650: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1651: @resources= sort { &cmp_title($a,$b) } @resources;
1652: } elsif ($args->{'sort'} eq 'duedate') {
1653: my $oldFilterFunc = $filterFunc;
1654: my $filterFunc=
1655: sub {
1656: my ($res)=@_;
1657: if (!$res->is_problem()) { return 0;}
1658: return &$oldFilterFunc($res);
1659: };
1660: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1661: @resources= sort {
1.270 albertel 1662: if ($a->duedate ne $b->duedate) {
1663: return $a->duedate cmp $b->duedate;
1664: }
1.296 albertel 1665: my $value=&cmp_title($a,$b);
1666: return $value;
1.270 albertel 1667: } @resources;
1.296 albertel 1668: } elsif ($args->{'sort'} eq 'discussion') {
1669: my $oldFilterFunc = $filterFunc;
1670: my $filterFunc=
1671: sub {
1672: my ($res)=@_;
1673: if (!$res->hasDiscussion() &&
1674: !$res->getFeedback() &&
1675: !$res->getErrors()) { return 0;}
1676: return &$oldFilterFunc($res);
1677: };
1678: @resources=$navmap->retrieveResources(undef,$filterFunc);
1679: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1680: } else {
1681: #unknow sort mechanism or default
1682: undef($args->{'sort'});
1.270 albertel 1683: }
1684:
1.276 albertel 1685:
1.270 albertel 1686: while (1) {
1687: if ($args->{'sort'}) {
1688: $curRes = shift(@resources);
1689: } else {
1690: $curRes = $it->next($closeAllPages);
1691: }
1692: if (!$curRes) { last; }
1693:
1.132 bowersj2 1694: # Maintain indentation level.
1695: if ($curRes == $it->BEGIN_MAP() ||
1696: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1697: $args->{'indentLevel'}++;
1.132 bowersj2 1698: }
1699: if ($curRes == $it->END_MAP() ||
1700: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1701: $args->{'indentLevel'}--;
1.132 bowersj2 1702: }
1703: # Notice new branches
1704: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1705: $args->{'isNewBranch'} = 1;
1706: }
1707:
1708: # If this isn't an actual resource, continue on
1709: if (!ref($curRes)) {
1710: next;
1.132 bowersj2 1711: }
1.133 bowersj2 1712:
1.143 bowersj2 1713: # If this has been filtered out, continue on
1714: if (!(&$filterFunc($curRes))) {
1715: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1716: next;
1717: }
1.132 bowersj2 1718:
1.190 bowersj2 1719: # If this is an empty sequence and we're filtering them, continue on
1.518 raeburn 1720: $args->{'mapHidden'} = 0;
1721: if (($curRes->is_map()) && (!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN})) {
1722: if ($args->{'suppressEmptySequences'}) {
1723: next;
1724: } else {
1725: my $mapname = &Apache::lonnet::declutter($curRes->src());
1726: $mapname = &Apache::lonnet::deversion($mapname);
1727: if (lc($navmap->get_mapparam(undef,$mapname,"0.hiddenresource")) eq 'yes') {
1728: if ($userCanSeeHidden) {
1729: $args->{'mapHidden'} = 1;
1730: } else {
1731: next;
1732: }
1733: }
1734: }
1.190 bowersj2 1735: }
1736:
1.153 bowersj2 1737: # If we're suppressing navmaps and this is a navmap, continue on
1738: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1739: next;
1740: }
1741:
1.191 bowersj2 1742: $args->{'counter'}++;
1743:
1.132 bowersj2 1744: # Does it have multiple parts?
1.133 bowersj2 1745: $args->{'multipart'} = 0;
1746: $args->{'condensed'} = 0;
1.132 bowersj2 1747: my @parts;
1748:
1749: # Decide what parts to show.
1.133 bowersj2 1750: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1751: @parts = @{$curRes->parts()};
1.192 bowersj2 1752: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1753:
1754: if ($condenseParts) { # do the condensation
1.133 bowersj2 1755: if (!$args->{'condensed'}) {
1.132 bowersj2 1756: # Decide whether to condense based on similarity
1.192 bowersj2 1757: my $status = $curRes->status($parts[0]);
1758: my $due = $curRes->duedate($parts[0]);
1759: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1760: my $statusAllSame = 1;
1761: my $dueAllSame = 1;
1762: my $openAllSame = 1;
1.192 bowersj2 1763: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1764: if ($curRes->status($parts[$i]) != $status){
1765: $statusAllSame = 0;
1766: }
1767: if ($curRes->duedate($parts[$i]) != $due ) {
1768: $dueAllSame = 0;
1769: }
1770: if ($curRes->opendate($parts[$i]) != $open) {
1771: $openAllSame = 0;
1772: }
1773: }
1774: # $*allSame is true if all the statuses were
1775: # the same. Now, if they are all the same and
1776: # match one of the statuses to condense, or they
1777: # are all open with the same due date, or they are
1778: # all OPEN_LATER with the same open date, display the
1779: # status of the first non-zero part (to get the 'correct'
1780: # status right, since 0 is never 'correct' or 'open').
1781: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1782: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1783: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1784: @parts = ($parts[0]);
1.133 bowersj2 1785: $args->{'condensed'} = 1;
1.132 bowersj2 1786: }
1787: }
1.198 bowersj2 1788: # Multipart problem with one part: always "condense" (happens
1789: # to match the desirable behavior)
1790: if ($curRes->countParts() == 1) {
1791: @parts = ($parts[0]);
1792: $args->{'condensed'} = 1;
1793: }
1.132 bowersj2 1794: }
1.157 bowersj2 1795: }
1.132 bowersj2 1796:
1797: # If the multipart problem was condensed, "forget" it was multipart
1798: if (scalar(@parts) == 1) {
1.133 bowersj2 1799: $args->{'multipart'} = 0;
1.192 bowersj2 1800: } else {
1801: # Add part 0 so we display it correctly.
1802: unshift @parts, '0';
1.132 bowersj2 1803: }
1.310 albertel 1804:
1805: {
1806: my ($src,$symb,$anchor,$stack);
1807: if ($args->{'sort'}) {
1808: my $it = $navmap->getIterator(undef, undef, undef, 1);
1809: while ( my $res=$it->next()) {
1810: if (ref($res) &&
1811: $res->symb() eq $curRes->symb()) { last; }
1812: }
1813: $stack=$it->getStack();
1814: } else {
1815: $stack=$it->getStack();
1816: }
1817: ($src,$symb,$anchor)=getLinkForResource($stack);
1818: if (defined($anchor)) { $anchor='#'.$anchor; }
1819: my $srcHasQuestion = $src =~ /\?/;
1820: $args->{"resourceLink"} = $src.
1.449 bisitz 1821: ($srcHasQuestion?'&':'?') .
1.384 www 1822: 'symb=' . &escape($symb).$anchor;
1.310 albertel 1823: }
1.132 bowersj2 1824: # Now, we've decided what parts to show. Loop through them and
1825: # show them.
1.192 bowersj2 1826: foreach my $part (@parts) {
1.132 bowersj2 1827: $rownum ++;
1828:
1.431 schulted 1829: $result .= &Apache::loncommon::start_data_table_row();
1.134 bowersj2 1830:
1831: # Set up some data about the parts that the cols might want
1832: my $filter = $it->{FILTER};
1.270 albertel 1833:
1.132 bowersj2 1834: # Now, display each column.
1835: foreach my $col (@$cols) {
1.139 bowersj2 1836: my $colHTML = '';
1837: if (ref($col)) {
1838: $colHTML .= &$col($curRes, $part, $args);
1839: } else {
1840: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1841: }
1.132 bowersj2 1842:
1.133 bowersj2 1843: # If this is the first column and it's time to print
1844: # the anchor, do so
1845: if ($col == $cols->[0] &&
1846: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1847: $currentJumpDelta) {
1848: # Jam the anchor after the <td> tag;
1849: # necessary for valid HTML (which Mozilla requires)
1850: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1851: $displayedJumpMarker = 1;
1852: }
1.139 bowersj2 1853: $result .= $colHTML . "\n";
1.132 bowersj2 1854: }
1.431 schulted 1855: $result .= &Apache::loncommon::end_data_table_row();
1.140 bowersj2 1856: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1857: }
1.153 bowersj2 1858:
1.139 bowersj2 1859: if ($r && $rownum % 20 == 0) {
1860: $r->print($result);
1861: $result = "";
1862: $r->rflush();
1.132 bowersj2 1863: }
1.156 bowersj2 1864: } continue {
1.208 bowersj2 1865: if ($r) {
1866: # If we have the connection, make sure the user is still connected
1867: my $c = $r->connection;
1868: if ($c->aborted()) {
1869: # Who cares what we do, nobody will see it anyhow.
1870: return '';
1871: }
1872: }
1.132 bowersj2 1873: }
1.486 raeburn 1874:
1875: $result.=&Apache::loncommon::end_data_table();
1.132 bowersj2 1876:
1.134 bowersj2 1877: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1878: # delay needed because the browser is processing the jump before
1879: # it finishes rendering, so it goes to the wrong place!
1880: # onload might be better, but this routine has no access to that.
1881: # On mozilla, the 0-millisecond timeout seems to prevent this;
1882: # it's quite likely this might fix other browsers, too, and
1883: # certainly won't hurt anything.
1.139 bowersj2 1884: if ($displayedJumpMarker) {
1.449 bisitz 1885: $result .= &Apache::lonhtmlcommon::scripttag("
1.247 albertel 1886: if (location.href.indexOf('#curloc')==-1) {
1887: setTimeout(\"location += '#curloc';\", 0)
1888: }
1.449 bisitz 1889: ");
1.134 bowersj2 1890: }
1891:
1.140 bowersj2 1892: if ($r) {
1893: $r->print($result);
1894: $result = "";
1895: $r->rflush();
1896: }
1897:
1.132 bowersj2 1898: return $result;
1899: }
1900:
1.281 albertel 1901: sub add_linkitem {
1902: my ($linkitems,$name,$cmd,$text)=@_;
1903: $$linkitems{$name}{'cmd'}=$cmd;
1904: $$linkitems{$name}{'text'}=&mt($text);
1905: }
1906:
1.430 schulted 1907: sub show_linkitems_toolbar {
1.476 raeburn 1908: my ($args,$condition) = @_;
1.478 raeburn 1909: my $result;
1.476 raeburn 1910: if (ref($args) eq 'HASH') {
1911: if (ref($args->{'linkitems'}) eq 'HASH') {
1.478 raeburn 1912: my $numlinks = scalar(keys(%{$args->{'linkitems'}}));
1913: if ($numlinks > 1) {
1914: $result = '<td>'.
1915: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',
1916: undef,'RAT').
1917: '</td>'.
1918: '<td> </td>'.
1919: '<td class="LC_middle">'.&mt('Tools:').'</td>';
1920: }
1921: $result .= '<td align="left">'."\n".
1922: '<ul id="LC_toolbar">';
1.476 raeburn 1923: my @linkorder = ('firsthomework','everything','uncompleted',
1924: 'changefolder','clearbubbles','edittoplevel');
1925: foreach my $link (@linkorder) {
1926: if (ref($args->{'linkitems'}{$link}) eq 'HASH') {
1927: if ($args->{'linkitems'}{$link}{'text'} ne '') {
1928: $args->{'linkitems'}{$link}{'cmd'}=~s/"/'/g;
1929: if ($args->{'linkitems'}{$link}{'cmd'}) {
1.478 raeburn 1930: my $link_id = 'LC_content_toolbar_'.$link;
1.476 raeburn 1931: if ($link eq 'changefolder') {
1932: if ($condition) {
1933: $link_id='LC_content_toolbar_changefolder_toggled';
1934: } else {
1935: $link_id='LC_content_toolbar_changefolder';
1936: }
1937: }
1938: $result .= '<li><a href="#" '.
1939: 'onclick="'.$args->{'linkitems'}{$link}{'cmd'}.'" '.
1940: 'id="'.$link_id.'" '.
1941: 'class="LC_toolbarItem" '.
1942: 'title="'.$args->{'linkitems'}{$link}{'text'}.'">'.
1943: '</a></li>'."\n";
1.446 raeburn 1944: }
1945: }
1946: }
1947: }
1.476 raeburn 1948: $result .= '</ul>'.
1.486 raeburn 1949: '</td>';
1.478 raeburn 1950: if (($numlinks==1) && (exists($args->{'linkitems'}{'edittoplevel'}))) {
1951: $result .= '<td><a href="'.$args->{'linkitems'}{'edittoplevel'}{'cmd'}.'">'.
1952: &mt('Content Editor').'</a></td>';
1953: }
1.476 raeburn 1954: }
1955: if ($args->{'sort_html'}) {
1956: $result .= '<td> </td><td> </td><td> </td>'.
1957: '<td align="right">'.$args->{'sort_html'}.'</td>';
1.446 raeburn 1958: }
1.430 schulted 1959: }
1.478 raeburn 1960: if ($result) {
1961: $result = "<table><tr>$result</tr></table>";
1962: }
1.430 schulted 1963: return $result;
1964: }
1965:
1.133 bowersj2 1966: 1;
1967:
1.418 jms 1968:
1969:
1970:
1971:
1972:
1973:
1974:
1975:
1.133 bowersj2 1976: package Apache::lonnavmaps::navmap;
1977:
1978: =pod
1979:
1.216 bowersj2 1980: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 1981:
1.217 bowersj2 1982: =head2 Overview
1.133 bowersj2 1983:
1.217 bowersj2 1984: The navmap object's job is to provide access to the resources
1985: in the course as Apache::lonnavmaps::resource objects, and to
1986: query and manage the relationship between those resource objects.
1987:
1988: Generally, you'll use the navmap object in one of three basic ways.
1989: In order of increasing complexity and power:
1990:
1991: =over 4
1992:
1.358 albertel 1993: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
1.217 bowersj2 1994: various ways to obtain resource objects, based on various identifiers.
1995: Use this when you want to request information about one object or
1996: a handful of resources you already know the identities of, from some
1997: other source. For more about Ids, Symbs, and MapPcs, see the
1998: Resource documentation. Note that Url should be a B<last resort>,
1.358 albertel 1999: not your first choice; it only really works when there is only one
1.217 bowersj2 2000: instance of the resource in the course, which only applies to
1.358 albertel 2001: maps, and even that may change in the future (see the B<getResourceByUrl>
2002: documentation for more details.)
1.217 bowersj2 2003:
2004: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
2005: retrieves resources matching some criterion and returns them
2006: in a flat array, with no structure information. Use this when
2007: you are manipulating a series of resources, based on what map
2008: the are in, but do not care about branching, or exactly how
2009: the maps and resources are related. This is the most common case.
2010:
2011: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
2012: the course's navmap in various ways without writing the traversal
2013: code yourself. See iterator documentation below. Use this when
2014: you need to know absolutely everything about the course, including
2015: branches and the precise relationship between maps and resources.
2016:
2017: =back
2018:
2019: =head2 Creation And Destruction
2020:
2021: To create a navmap object, use the following function:
1.133 bowersj2 2022:
2023: =over 4
2024:
1.221 bowersj2 2025: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 2026:
1.221 bowersj2 2027: Creates a new navmap object. Returns the navmap object if this is
2028: successful, or B<undef> if not.
1.174 albertel 2029:
1.216 bowersj2 2030: =back
2031:
2032: =head2 Methods
2033:
2034: =over 4
2035:
1.174 albertel 2036: =item * B<getIterator>(first, finish, filter, condition):
2037:
2038: See iterator documentation below.
1.133 bowersj2 2039:
2040: =cut
2041:
2042: use strict;
2043: use GDBM_File;
1.320 albertel 2044: use Apache::lonnet;
1.397 albertel 2045: use LONCAPA;
1.133 bowersj2 2046:
2047: sub new {
2048: # magic invocation to create a class instance
2049: my $proto = shift;
2050: my $class = ref($proto) || $proto;
2051: my $self = {};
1.501 raeburn 2052: bless($self); # So we can call change_user if necessary
1.133 bowersj2 2053:
1.453 www 2054: $self->{USERNAME} = shift || $env{'user.name'};
2055: $self->{DOMAIN} = shift || $env{'user.domain'};
1.491 raeburn 2056: $self->{CODE} = shift;
1.496 raeburn 2057: $self->{NOHIDE} = shift;
1.453 www 2058:
1.465 foxr 2059:
2060:
1.133 bowersj2 2061: # Resource cache stores navmap resources as we reference them. We generate
2062: # them on-demand so we don't pay for creating resources unless we use them.
2063: $self->{RESOURCE_CACHE} = {};
2064:
2065: # Network failure flag, if we accessed the course or user opt and
2066: # failed
2067: $self->{NETWORK_FAILURE} = 0;
2068:
1.465 foxr 2069: # We can only tie the nav hash as done below if the username/domain
2070: # match the env one. Otherwise change_user does everything we need...since we can't
1.501 raeburn 2071: # assume there are course hashes for the specific requested user:domain
2072: # Note: change_user is also called if we need the nav hash when printing CODEd
2073: # assignments or printing an exam, in which the enclosing folder for the items in
2074: # the exam has hidden set.
1.465 foxr 2075: #
1.133 bowersj2 2076:
1.501 raeburn 2077: if (($self->{USERNAME} eq $env{'user.name'}) && ($self->{DOMAIN} eq $env{'user.domain'}) &&
2078: !$self->{CODE} && !$self->{NOHIDE}) {
1.465 foxr 2079:
2080: # tie the nav hash
2081:
2082: my %navmaphash;
2083: my %parmhash;
2084: my $courseFn = $env{"request.course.fn"};
2085: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
2086: &GDBM_READER(), 0640))) {
2087: return undef;
2088: }
2089:
2090: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
2091: &GDBM_READER(), 0640)))
2092: {
2093: untie %{$self->{PARM_HASH}};
2094: return undef;
2095: }
2096:
2097: $self->{NAV_HASH} = \%navmaphash;
2098: $self->{PARM_HASH} = \%parmhash;
2099: $self->{PARM_CACHE} = {};
2100: } else {
1.496 raeburn 2101: $self->change_user($self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE});
1.133 bowersj2 2102: }
1.470 foxr 2103:
1.465 foxr 2104: return $self;
2105: }
2106:
2107: #
2108: # In some instances it is useful to be able to dynamically change the
2109: # username/domain associated with a navmap (e.g. to navigate for someone
2110: # else besides the current user...if sufficiently privileged.
2111: # Parameters:
2112: # user - New user.
2113: # domain- Domain the user belongs to.
1.491 raeburn 2114: # code - Anonymous CODE in use.
1.465 foxr 2115: # Implicit inputs:
2116: #
2117: sub change_user {
2118: my $self = shift;
2119: $self->{USERNAME} = shift;
2120: $self->{DOMAIN} = shift;
1.491 raeburn 2121: $self->{CODE} = shift;
1.496 raeburn 2122: $self->{NOHIDE} = shift;
1.465 foxr 2123:
2124: # If the hashes are already tied make sure to break that bond:
2125:
2126: untie %{$self->{NAV_HASH}};
2127: untie %{$self->{PARM_HASH}};
2128:
2129: # The assumption is that we have to
2130: # use lonmap here to re-read the hash and from it reconstruct
2131: # new big and parameter hashes. An implicit assumption at this time
2132: # is that the course file is probably not created locally yet
2133: # an that we will therefore just read without tying.
2134:
2135: my ($cdom, $cnum) = split(/\_/, $env{'request.course.id'});
2136:
2137: my %big_hash;
1.496 raeburn 2138: &Apache::lonmap::loadmap($cnum, $cdom, $self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE}, \%big_hash);
1.465 foxr 2139: $self->{NAV_HASH} = \%big_hash;
2140:
1.470 foxr 2141:
2142:
1.514 raeburn 2143: # Now clear the parm cache and reconstruct the parm hash from the big_hash
1.465 foxr 2144: # param.xxxx keys.
2145:
2146: $self->{PARM_CACHE} = {};
1.133 bowersj2 2147:
1.465 foxr 2148: my %parm_hash = {};
1.504 raeburn 2149: foreach my $key (keys(%big_hash)) {
1.465 foxr 2150: if ($key =~ /^param\./) {
2151: my $param_key = $key;
2152: $param_key =~ s/^param\.//;
2153: $parm_hash{$param_key} = $big_hash{$key};
2154: }
1.133 bowersj2 2155: }
2156:
1.465 foxr 2157: $self->{PARM_HASH} = \%parm_hash;
2158:
1.500 raeburn 2159: }
1.133 bowersj2 2160:
1.221 bowersj2 2161: sub generate_course_user_opt {
1.133 bowersj2 2162: my $self = shift;
1.221 bowersj2 2163: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 2164:
1.453 www 2165: my $uname=$self->{USERNAME};
2166: my $udom=$self->{DOMAIN};
2167:
1.320 albertel 2168: my $cid=$env{'request.course.id'};
1.326 albertel 2169: my $cdom=$env{'course.'.$cid.'.domain'};
2170: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2171:
1.133 bowersj2 2172: # ------------------------------------------------- Get coursedata (if present)
1.326 albertel 2173: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2174: # Check for network failure
2175: if (!ref($courseopt)) {
2176: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
1.324 albertel 2177: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2178: }
1.326 albertel 2179: undef($courseopt);
2180: }
1.325 albertel 2181:
1.133 bowersj2 2182: # --------------------------------------------------- Get userdata (if present)
1.325 albertel 2183:
1.326 albertel 2184: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2185: # Check for network failure
2186: if (!ref($useropt)) {
2187: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
1.324 albertel 2188: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2189: }
1.326 albertel 2190: undef($useropt);
1.221 bowersj2 2191: }
2192:
1.326 albertel 2193: $self->{COURSE_OPT} = $courseopt;
2194: $self->{USER_OPT} = $useropt;
2195:
1.221 bowersj2 2196: $self->{COURSE_USER_OPT_GENERATED} = 1;
2197:
2198: return;
2199: }
2200:
1.485 foxr 2201:
2202:
1.221 bowersj2 2203: sub generate_email_discuss_status {
2204: my $self = shift;
1.259 raeburn 2205: my $symb = shift;
1.221 bowersj2 2206: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 2207:
1.320 albertel 2208: my $cid=$env{'request.course.id'};
1.326 albertel 2209: my $cdom=$env{'course.'.$cid.'.domain'};
2210: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2211:
1.454 www 2212: my %emailstatus = &Apache::lonnet::dump('email_status',$self->{DOMAIN},$self->{USERNAME});
1.221 bowersj2 2213: my $logoutTime = $emailstatus{'logout'};
1.320 albertel 2214: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
1.221 bowersj2 2215: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2216: $courseLeaveTime : $logoutTime);
2217: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2218: $cdom, $cnum);
1.259 raeburn 2219: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
1.453 www 2220: $self->{DOMAIN},$self->{USERNAME},'lastread');
1.259 raeburn 2221: my %lastreadtime = ();
1.504 raeburn 2222: foreach my $key (keys(%lastread)) {
1.394 raeburn 2223: my $shortkey = $key;
2224: $shortkey =~ s/_lastread$//;
2225: $lastreadtime{$shortkey} = $lastread{$key};
1.259 raeburn 2226: }
2227:
1.221 bowersj2 2228: my %feedback=();
2229: my %error=();
1.453 www 2230: my @keys = &Apache::lonnet::getkeys('nohist_email',$self->{DOMAIN},
2231: $self->{USERNAME});
1.221 bowersj2 2232:
1.325 albertel 2233: foreach my $msgid (@keys) {
1.295 albertel 2234: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
1.395 raeburn 2235: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
2236: $symb,$error) = &Apache::lonmsg::unpackmsgid($msgid);
1.396 raeburn 2237: &Apache::lonenc::check_decrypt(\$symb);
2238: if (($fromcid ne '') && ($fromcid ne $cid)) {
2239: next;
2240: }
1.395 raeburn 2241: if (defined($symb)) {
2242: if (defined($error) && $error == 1) {
2243: $error{$symb}.=','.$msgid;
2244: } else {
2245: $feedback{$symb}.=','.$msgid;
2246: }
2247: } else {
2248: my $plain=
2249: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
2250: if ($plain=~/ \[([^\]]+)\]\:/) {
2251: my $url=$1;
2252: if ($plain=~/\:Error \[/) {
2253: $error{$url}.=','.$msgid;
2254: } else {
2255: $feedback{$url}.=','.$msgid;
2256: }
2257: }
2258: }
1.221 bowersj2 2259: }
1.211 bowersj2 2260: }
1.221 bowersj2 2261:
1.395 raeburn 2262: #symbs of resources that have feedbacks (will be urls pre-2.3)
1.221 bowersj2 2263: $self->{FEEDBACK} = \%feedback;
1.395 raeburn 2264: #or errors (will be urls pre 2.3)
1.295 albertel 2265: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 2266: $self->{DISCUSSION_TIME} = \%discussiontime;
2267: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 2268: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 2269:
2270: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2271: }
2272:
2273: sub get_user_data {
2274: my $self = shift;
2275: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 2276:
1.221 bowersj2 2277: # Retrieve performance data on problems
1.320 albertel 2278: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
1.453 www 2279: $self->{DOMAIN},
2280: $self->{USERNAME});
1.221 bowersj2 2281: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 2282:
1.221 bowersj2 2283: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 2284: }
2285:
1.354 raeburn 2286: sub get_discussion_data {
2287: my $self = shift;
2288: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
1.366 albertel 2289: return $self->{DISCUSSION_DATA};
1.354 raeburn 2290: }
1.366 albertel 2291:
2292: $self->generate_email_discuss_status();
2293:
1.354 raeburn 2294: my $cid=$env{'request.course.id'};
2295: my $cdom=$env{'course.'.$cid.'.domain'};
2296: my $cnum=$env{'course.'.$cid.'.num'};
2297: # Retrieve discussion data for resources in course
1.367 albertel 2298: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
1.366 albertel 2299:
2300:
1.354 raeburn 2301: $self->{DISCUSSION_DATA} = \%discussion_data;
2302: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2303: return $self->{DISCUSSION_DATA};
2304: }
2305:
2306:
1.133 bowersj2 2307: # Internal function: Takes a key to look up in the nav hash and implements internal
2308: # memory caching of that key.
2309: sub navhash {
2310: my $self = shift; my $key = shift;
2311: return $self->{NAV_HASH}->{$key};
2312: }
2313:
1.217 bowersj2 2314: =pod
2315:
2316: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2317: false otherwise. Undefined course maps indicate an error somewhere in
2318: LON-CAPA, and you will not be able to proceed with using the navmap.
2319: See the B<NAV> screen for an example of using this.
2320:
2321: =cut
2322:
1.133 bowersj2 2323: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2324: sub courseMapDefined {
2325: my $self = shift;
1.320 albertel 2326: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
1.133 bowersj2 2327:
2328: my $firstres = $self->navhash("map_start_$uri");
2329: my $lastres = $self->navhash("map_finish_$uri");
2330: return $firstres && $lastres;
2331: }
2332:
2333: sub getIterator {
2334: my $self = shift;
2335: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.314 albertel 2336: shift, undef, shift,
2337: shift, shift);
1.133 bowersj2 2338: return $iterator;
2339: }
2340:
2341: # Private method: Does the given resource (as a symb string) have
2342: # current discussion? Returns 0 if chat/mail data not extracted.
2343: sub hasDiscussion {
2344: my $self = shift;
2345: my $symb = shift;
1.221 bowersj2 2346: $self->generate_email_discuss_status();
2347:
1.133 bowersj2 2348: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2349:
2350: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2351:
1.323 albertel 2352: # backward compatibility (bulletin boards used to be 'wrapped')
2353: my $ressymb = $self->wrap_symb($symb);
1.259 raeburn 2354: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2355: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2356: } else {
1.266 raeburn 2357: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2358: return $self->{DISCUSSION_TIME}->{$ressymb} > 0; # in 1.2 will display speech bubble icons for all items with posts until marked as read (even if read in v 1.1).
1.259 raeburn 2359: }
1.133 bowersj2 2360: }
2361:
1.366 albertel 2362: sub last_post_time {
2363: my $self = shift;
2364: my $symb = shift;
2365: my $ressymb = $self->wrap_symb($symb);
2366: return $self->{DISCUSSION_TIME}->{$ressymb};
2367: }
2368:
1.393 raeburn 2369: sub discussion_info {
1.366 albertel 2370: my $self = shift;
2371: my $symb = shift;
1.393 raeburn 2372: my $filter = shift;
1.366 albertel 2373:
2374: $self->get_discussion_data();
1.372 raeburn 2375:
1.366 albertel 2376: my $ressymb = $self->wrap_symb($symb);
1.372 raeburn 2377: # keys used to store bulletinboard postings use 'unwrapped' symb.
1.397 albertel 2378: my $discsymb = &escape($self->unwrap_symb($ressymb));
1.372 raeburn 2379: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
1.366 albertel 2380: if (!$version) { return; }
2381:
2382: my $prevread = $self->{LAST_READ}{$ressymb};
2383:
1.393 raeburn 2384: my $count = 0;
1.366 albertel 2385: my $hiddenflag = 0;
2386: my $deletedflag = 0;
1.393 raeburn 2387: my ($hidden,$deleted,%info);
1.366 albertel 2388:
2389: for (my $id=$version; $id>0; $id--) {
1.372 raeburn 2390: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
1.366 albertel 2391: my @keys=split(/:/,$vkeys);
2392: if (grep(/^hidden$/ ,@keys)) {
2393: if (!$hiddenflag) {
1.372 raeburn 2394: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
1.366 albertel 2395: $hiddenflag = 1;
2396: }
2397: } elsif (grep(/^deleted$/,@keys)) {
2398: if (!$deletedflag) {
1.372 raeburn 2399: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
1.366 albertel 2400: $deletedflag = 1;
2401: }
2402: } else {
1.393 raeburn 2403: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2404: if ($filter eq 'unread') {
2405: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2406: next;
2407: }
2408: }
2409: $count++;
2410: $info{$count}{'subject'} =
2411: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2412: $info{$count}{'id'} = $id;
2413: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2414: }
1.366 albertel 2415: }
2416: }
2417: if (wantarray) {
1.393 raeburn 2418: return ($count,%info);
1.366 albertel 2419: }
1.393 raeburn 2420: return $count;
1.366 albertel 2421: }
2422:
1.321 raeburn 2423: sub wrap_symb {
1.322 albertel 2424: my $self = shift;
1.321 raeburn 2425: my $symb = shift;
1.373 albertel 2426: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
1.322 albertel 2427: unless ($symb =~ m|adm/wrapper/adm|) {
2428: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
1.321 raeburn 2429: }
2430: }
1.322 albertel 2431: return $symb;
1.321 raeburn 2432: }
2433:
1.372 raeburn 2434: sub unwrap_symb {
2435: my $self = shift;
2436: my $ressymb = shift;
2437: my $discsymb = $ressymb;
1.373 albertel 2438: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
1.372 raeburn 2439: $discsymb = $1.$2;
2440: }
2441: return $discsymb;
2442: }
2443:
1.322 albertel 2444: # Private method: Does the given resource (as a symb string) have
2445: # current feedback? Returns the string in the feedback hash, which
2446: # will be false if it does not exist.
2447:
1.133 bowersj2 2448: sub getFeedback {
2449: my $self = shift;
2450: my $symb = shift;
1.395 raeburn 2451: my $source = shift;
1.133 bowersj2 2452:
1.221 bowersj2 2453: $self->generate_email_discuss_status();
2454:
1.133 bowersj2 2455: if (!defined($self->{FEEDBACK})) { return ""; }
2456:
1.395 raeburn 2457: my $feedback;
2458: if ($self->{FEEDBACK}->{$symb}) {
2459: $feedback = $self->{FEEDBACK}->{$symb};
2460: if ($self->{FEEDBACK}->{$source}) {
2461: $feedback .= ','.$self->{FEEDBACK}->{$source};
2462: }
2463: } else {
2464: if ($self->{FEEDBACK}->{$source}) {
2465: $feedback = $self->{FEEDBACK}->{$source};
2466: }
2467: }
2468: return $feedback;
1.133 bowersj2 2469: }
2470:
2471: # Private method: Get the errors for that resource (by source).
2472: sub getErrors {
2473: my $self = shift;
1.395 raeburn 2474: my $symb = shift;
1.133 bowersj2 2475: my $src = shift;
1.221 bowersj2 2476:
2477: $self->generate_email_discuss_status();
2478:
1.133 bowersj2 2479: if (!defined($self->{ERROR_MSG})) { return ""; }
1.395 raeburn 2480:
2481: my $errors;
2482: if ($self->{ERROR_MSG}->{$symb}) {
2483: $errors = $self->{ERROR_MSG}->{$symb};
2484: if ($self->{ERROR_MSG}->{$src}) {
2485: $errors .= ','.$self->{ERROR_MSG}->{$src};
2486: }
2487: } else {
2488: if ($self->{ERROR_MSG}->{$src}) {
2489: $errors = $self->{ERROR_MSG}->{$src};
2490: }
2491: }
2492: return $errors;
1.133 bowersj2 2493: }
2494:
2495: =pod
2496:
1.174 albertel 2497: =item * B<getById>(id):
2498:
2499: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2500: object for that resource. This method, or other methods that use it
2501: (as in the resource object) is the only proper way to obtain a
2502: resource object.
1.133 bowersj2 2503:
1.194 bowersj2 2504: =item * B<getBySymb>(symb):
2505:
2506: Based on the symb of the resource, get a resource object for that
2507: resource. This is one of the proper ways to get a resource object.
2508:
1.448 raeburn 2509: =item * B<getByMapPc>(map_pc):
1.194 bowersj2 2510:
2511: Based on the map_pc of the resource, get a resource object for
2512: the given map. This is one of the proper ways to get a resource object.
2513:
1.133 bowersj2 2514: =cut
2515:
2516: # The strategy here is to cache the resource objects, and only construct them
2517: # as we use them. The real point is to prevent reading any more from the tied
1.398 banghart 2518: # hash than we have to, which should hopefully alleviate speed problems.
1.133 bowersj2 2519:
2520: sub getById {
2521: my $self = shift;
2522: my $id = shift;
2523:
2524: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2525: {
2526: return $self->{RESOURCE_CACHE}->{$id};
2527: }
2528:
2529: # resource handles inserting itself into cache.
2530: # Not clear why the quotes are necessary, but as of this
2531: # writing it doesn't work without them.
2532: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2533: }
1.133 bowersj2 2534:
1.172 bowersj2 2535: sub getBySymb {
2536: my $self = shift;
2537: my $symb = shift;
1.277 matthew 2538:
1.228 albertel 2539: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2540: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2541: my $returnvalue = undef;
2542: if (ref($map)) {
2543: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2544: }
2545: return $returnvalue;
1.194 bowersj2 2546: }
2547:
2548: sub getByMapPc {
2549: my $self = shift;
2550: my $map_pc = shift;
2551: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2552: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2553: return $self->getById($map_id);
1.172 bowersj2 2554: }
2555:
1.133 bowersj2 2556: =pod
2557:
1.174 albertel 2558: =item * B<firstResource>():
2559:
2560: Returns a resource object reference corresponding to the first
2561: resource in the navmap.
1.133 bowersj2 2562:
2563: =cut
2564:
2565: sub firstResource {
2566: my $self = shift;
2567: my $firstResource = $self->navhash('map_start_' .
1.320 albertel 2568: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2569: return $self->getById($firstResource);
1.132 bowersj2 2570: }
1.133 bowersj2 2571:
2572: =pod
2573:
1.174 albertel 2574: =item * B<finishResource>():
2575:
2576: Returns a resource object reference corresponding to the last resource
2577: in the navmap.
1.133 bowersj2 2578:
2579: =cut
2580:
2581: sub finishResource {
2582: my $self = shift;
2583: my $firstResource = $self->navhash('map_finish_' .
1.320 albertel 2584: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2585: return $self->getById($firstResource);
1.132 bowersj2 2586: }
1.133 bowersj2 2587:
2588: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2589: # the actual lookup; parmval caches the results.
2590: sub parmval {
2591: my $self = shift;
1.399 albertel 2592: my ($what,$symb,$recurse)=@_;
1.133 bowersj2 2593: my $hashkey = $what."|||".$symb;
1.459 foxr 2594: my $cache = $self->{PARM_CACHE};
1.133 bowersj2 2595: if (defined($self->{PARM_CACHE}->{$hashkey})) {
1.411 raeburn 2596: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
2597: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
2598: if (wantarray) {
2599: return @{$self->{PARM_CACHE}->{$hashkey}};
2600: } else {
2601: return $self->{PARM_CACHE}->{$hashkey}->[0];
2602: }
2603: }
2604: } else {
2605: return $self->{PARM_CACHE}->{$hashkey};
2606: }
1.133 bowersj2 2607: }
1.515 raeburn 2608:
1.399 albertel 2609: my $result = $self->parmval_real($what, $symb, $recurse);
1.133 bowersj2 2610: $self->{PARM_CACHE}->{$hashkey} = $result;
1.405 albertel 2611: if (wantarray) {
1.411 raeburn 2612: return @{$result};
1.405 albertel 2613: }
2614: return $result->[0];
1.132 bowersj2 2615: }
2616:
1.485 foxr 2617:
1.133 bowersj2 2618: sub parmval_real {
2619: my $self = shift;
1.219 albertel 2620: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2621:
1.485 foxr 2622:
1.221 bowersj2 2623: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2624: $self->generate_course_user_opt();
2625:
1.320 albertel 2626: my $cid=$env{'request.course.id'};
2627: my $csec=$env{'request.course.sec'};
1.350 raeburn 2628: my $cgroup='';
2629: my @cgrps=split(/:/,$env{'request.course.groups'});
2630: if (@cgrps > 0) {
2631: @cgrps = sort(@cgrps);
2632: $cgroup = $cgrps[0];
2633: }
1.453 www 2634: my $uname=$self->{USERNAME};
2635: my $udom=$self->{DOMAIN};
1.133 bowersj2 2636:
1.405 albertel 2637: unless ($symb) { return ['']; }
1.133 bowersj2 2638: my $result='';
2639:
1.226 www 2640: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.383 albertel 2641: $mapname = &Apache::lonnet::deversion($mapname);
1.515 raeburn 2642: my ($recursed,@recurseup);
2643:
1.133 bowersj2 2644: # ----------------------------------------------------- Cascading lookup scheme
2645: my $rwhat=$what;
2646: $what=~s/^parameter\_//;
2647: $what=~s/\_/\./;
2648:
2649: my $symbparm=$symb.'.'.$what;
1.515 raeburn 2650: my $recurseparm=$mapname.'___(rec).'.$what;
1.133 bowersj2 2651: my $mapparm=$mapname.'___(all).'.$what;
1.325 albertel 2652: my $usercourseprefix=$cid;
1.515 raeburn 2653:
1.485 foxr 2654:
2655:
1.350 raeburn 2656: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2657: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
1.515 raeburn 2658: my $grpleveli=$usercourseprefix.'.['.$cgroup.'].'.$recurseparm;
1.350 raeburn 2659: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2660:
1.485 foxr 2661:
1.133 bowersj2 2662: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2663: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
1.515 raeburn 2664: my $secleveli=$usercourseprefix.'.['.$csec.'].'.$recurseparm;
1.133 bowersj2 2665: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2666:
1.485 foxr 2667:
1.133 bowersj2 2668: my $courselevel= $usercourseprefix.'.'.$what;
2669: my $courselevelr=$usercourseprefix.'.'.$symbparm;
1.515 raeburn 2670: my $courseleveli=$usercourseprefix.'.'.$recurseparm;
1.133 bowersj2 2671: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2672:
1.485 foxr 2673:
1.133 bowersj2 2674: my $useropt = $self->{USER_OPT};
2675: my $courseopt = $self->{COURSE_OPT};
2676: my $parmhash = $self->{PARM_HASH};
2677:
2678: # ---------------------------------------------------------- first, check user
2679: if ($uname and defined($useropt)) {
1.405 albertel 2680: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2681: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
1.515 raeburn 2682: if (defined($$useropt{$courseleveli})) { return [$$useropt{$courseleveli},'map']; }
2683: unless ($recursed) {
2684: @recurseup = $self->recurseup_maps($mapname);
2685: $recursed = 1;
2686: }
2687: foreach my $item (@recurseup) {
2688: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2689: last if (defined($$useropt{$norecursechk}));
2690: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2691: if (defined($$useropt{$recursechk})) { return [$$useropt{$recursechk},'map']; }
2692: }
1.405 albertel 2693: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
1.133 bowersj2 2694: }
2695:
2696: # ------------------------------------------------------- second, check course
1.350 raeburn 2697: if ($cgroup ne '' and defined($courseopt)) {
1.405 albertel 2698: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2699: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
1.515 raeburn 2700: if (defined($$courseopt{$grpleveli})) { return [$$courseopt{$grpleveli},'map']; }
2701: unless ($recursed) {
2702: @recurseup = $self->recurseup_maps($mapname);
2703: $recursed = 1;
2704: }
2705: foreach my $item (@recurseup) {
2706: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
2707: last if (defined($$courseopt{$norecursechk}));
2708: my $recursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(rec).'.$what;
2709: if (defined($$courseopt{$recursechk})) { return [$$courseopt{$recursechk},'map']; }
2710: }
1.405 albertel 2711: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
1.350 raeburn 2712: }
2713:
1.515 raeburn 2714: if ($csec ne '' and defined($courseopt)) {
1.405 albertel 2715: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2716: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
1.515 raeburn 2717: if (defined($$courseopt{$secleveli})) { return [$$courseopt{$secleveli},'map']; }
2718: unless ($recursed) {
2719: @recurseup = $self->recurseup_maps($mapname);
2720: $recursed = 1;
2721: }
2722: foreach my $item (@recurseup) {
2723: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
2724: last if (defined($$courseopt{$norecursechk}));
2725: my $recursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(rec).'.$what;
2726: if (defined($$courseopt{$recursechk})) { return [$$courseopt{$recursechk},'map']; }
2727: }
1.405 albertel 2728: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
1.133 bowersj2 2729: }
2730:
2731: if (defined($courseopt)) {
1.405 albertel 2732: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
1.133 bowersj2 2733: }
2734:
2735: # ----------------------------------------------------- third, check map parms
2736:
2737: my $thisparm=$$parmhash{$symbparm};
1.405 albertel 2738: if (defined($thisparm)) { return [$thisparm,'map']; }
1.133 bowersj2 2739:
2740: # ----------------------------------------------------- fourth , check default
2741:
1.246 albertel 2742: my $meta_rwhat=$rwhat;
2743: $meta_rwhat=~s/\./_/g;
2744: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
1.405 albertel 2745: if (defined($default)) { return [$default,'resource']}
1.246 albertel 2746: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.405 albertel 2747: if (defined($default)) { return [$default,'resource']}
1.315 albertel 2748: # --------------------------------------------------- fifth, check more course
2749: if (defined($courseopt)) {
1.405 albertel 2750: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
1.515 raeburn 2751: if (defined($$courseopt{$courseleveli})) { return [$$courseopt{$courseleveli},'map']; }
2752: unless ($recursed) {
2753: @recurseup = $self->recurseup_maps($mapname);
2754: $recursed = 1;
2755: }
2756: foreach my $item (@recurseup) {
2757: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2758: last if (defined($$courseopt{$norecursechk}));
2759: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2760: if (defined($$courseopt{$recursechk})) {
2761: return [$$courseopt{$recursechk},'map'];
2762: }
2763: }
1.405 albertel 2764: if (defined($$courseopt{$courselevel})) {
2765: my $ret = [$$courseopt{$courselevel},'course'];
2766: return $ret;
2767: }
1.315 albertel 2768: }
2769: # --------------------------------------------------- sixth , cascade up parts
1.133 bowersj2 2770:
2771: my ($space,@qualifier)=split(/\./,$rwhat);
2772: my $qualifier=join('.',@qualifier);
2773: unless ($space eq '0') {
1.160 albertel 2774: my @parts=split(/_/,$space);
2775: my $id=pop(@parts);
2776: my $part=join('_',@parts);
2777: if ($part eq '') { $part='0'; }
1.405 albertel 2778: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2779: if (defined($partgeneral[0])) { return \@partgeneral; }
1.133 bowersj2 2780: }
1.405 albertel 2781: if ($recurse) { return []; }
1.399 albertel 2782: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
1.405 albertel 2783: if (defined($pack_def)) { return [$pack_def,'resource']; }
2784: return [''];
1.145 bowersj2 2785: }
1.515 raeburn 2786:
2787: sub recurseup_maps {
2788: my ($self,$mapname) = @_;
2789: my @recurseup;
1.517 raeburn 2790: if ($mapname) {
1.519 raeburn 2791: my $res = $self->getResourceByUrl($mapname);
2792: if (ref($res)) {
2793: my @pcs = split(/,/,$res->map_hierarchy());
2794: shift(@pcs);
2795: if (@pcs) {
2796: @recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
2797: }
1.517 raeburn 2798: }
1.515 raeburn 2799: }
2800: return @recurseup;
2801: }
2802:
1.485 foxr 2803: #
2804: # Determines the open/close dates for printing a map that
2805: # encloses a resource.
2806: #
2807: sub map_printdates {
2808: my ($self, $res, $part) = @_;
2809:
2810:
2811:
2812:
2813:
1.518 raeburn 2814: my $opendate = $self->get_mapparam($res->symb(),'',"$part.printstartdate");
2815: my $closedate= $self->get_mapparam($res->symb(),'',"$part.printenddate");
1.485 foxr 2816:
2817:
2818: return ($opendate, $closedate);
2819: }
2820:
2821: sub get_mapparam {
1.518 raeburn 2822: my ($self, $symb, $mapname, $what) = @_;
1.485 foxr 2823:
2824: # Ensure the course option hash is populated:
2825:
2826: $self->generate_course_user_opt();
2827:
2828: # Get the course id and section if there is one.
2829:
2830: my $cid=$env{'request.course.id'};
2831: my $csec=$env{'request.course.sec'};
2832: my $cgroup='';
2833: my @cgrps=split(/:/,$env{'request.course.groups'});
2834: if (@cgrps > 0) {
2835: @cgrps = sort(@cgrps);
2836: $cgroup = $cgrps[0];
2837: }
2838: my $uname=$self->{USERNAME};
2839: my $udom=$self->{DOMAIN};
2840:
1.518 raeburn 2841: unless ($symb || $mapname) { return; }
1.485 foxr 2842: my $result='';
1.516 raeburn 2843: my ($recursed,@recurseup);
1.485 foxr 2844:
2845:
2846: # Figure out which map we are in.
2847:
1.518 raeburn 2848: if ($symb && !$mapname) {
2849: my ($id,$fn);
2850: ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
2851: $mapname = &Apache::lonnet::deversion($mapname);
2852: }
1.485 foxr 2853:
2854:
2855: my $rwhat=$what;
2856: $what=~s/^parameter\_//;
2857: $what=~s/\_/\./;
2858:
2859: # Build the hash keys for the lookup:
2860:
2861: my $mapparm=$mapname.'___(all).'.$what;
1.515 raeburn 2862: my $recurseparm=$mapname.'___(rec).'.$what;
1.485 foxr 2863: my $usercourseprefix=$cid;
2864:
2865:
1.515 raeburn 2866: my $grplevelm = "$usercourseprefix.[$cgroup].$mapparm";
2867: my $seclevelm = "$usercourseprefix.[$csec].$mapparm";
2868: my $courselevelm = "$usercourseprefix.$mapparm";
2869:
2870: my $grpleveli = "$usercourseprefix.[$cgroup].$recurseparm";
2871: my $secleveli = "$usercourseprefix.[$csec].$recurseparm";
2872: my $courseleveli = "$usercourseprefix.$recurseparm";
1.485 foxr 2873:
2874: # Get handy references to the hashes we need in $self:
2875:
2876: my $useropt = $self->{USER_OPT};
2877: my $courseopt = $self->{COURSE_OPT};
2878: my $parmhash = $self->{PARM_HASH};
2879:
2880: # Check per user
2881:
2882:
2883:
2884: if ($uname and defined($useropt)) {
1.515 raeburn 2885: if (defined($$useropt{$courselevelm})) {
2886: return $$useropt{$courselevelm};
1.485 foxr 2887: }
1.515 raeburn 2888: if (defined($$useropt{$courseleveli})) {
2889: return $$useropt{$courseleveli};
2890: }
1.516 raeburn 2891: unless ($recursed) {
2892: @recurseup = $self->recurseup_maps($mapname);
2893: $recursed = 1;
2894: }
2895: foreach my $item (@recurseup) {
2896: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2897: last if (defined($$useropt{$norecursechk}));
2898: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2899: if (defined($$useropt{$recursechk})) {
2900: return $$useropt{$recursechk};
2901: }
2902: }
1.485 foxr 2903: }
2904:
2905: # Check course -- group
2906:
2907:
2908:
2909: if ($cgroup ne '' and defined ($courseopt)) {
1.515 raeburn 2910: if (defined($$courseopt{$grplevelm})) {
2911: return $$courseopt{$grplevelm};
1.485 foxr 2912: }
1.515 raeburn 2913: if (defined($$courseopt{$grpleveli})) {
2914: return $$courseopt{$grpleveli};
2915: }
1.516 raeburn 2916: unless ($recursed) {
2917: @recurseup = $self->recurseup_maps($mapname);
2918: $recursed = 1;
2919: }
2920: foreach my $item (@recurseup) {
2921: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
2922: last if (defined($$courseopt{$norecursechk}));
2923: my $recursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(rec).'.$what;
2924: if (defined($$courseopt{$recursechk})) {
2925: return $$courseopt{$recursechk};
2926: }
2927: }
1.485 foxr 2928: }
2929:
2930: # Check course -- section
2931:
2932:
1.516 raeburn 2933: if ($csec ne '' and defined($courseopt)) {
1.515 raeburn 2934: if (defined($$courseopt{$seclevelm})) {
2935: return $$courseopt{$seclevelm};
1.485 foxr 2936: }
1.515 raeburn 2937: if (defined($$courseopt{$secleveli})) {
2938: return $$courseopt{$secleveli};
2939: }
1.516 raeburn 2940: unless ($recursed) {
2941: @recurseup = $self->recurseup_maps($mapname);
2942: $recursed = 1;
2943: }
2944: foreach my $item (@recurseup) {
2945: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
2946: last if (defined($$courseopt{$norecursechk}));
2947: my $recursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(rec).'.$what;
2948: if (defined($$courseopt{$recursechk})) {
2949: return $$courseopt{$recursechk};
2950: }
2951: }
1.485 foxr 2952: }
2953: # Check the map parameters themselves:
2954:
1.518 raeburn 2955: if ($symb) {
2956: my $symbparm=$symb.'.'.$what;
2957: my $thisparm = $$parmhash{$symbparm};
2958: if (defined($thisparm)) {
2959: return $thisparm;
2960: }
1.485 foxr 2961: }
2962:
2963:
2964: # Additional course parameters:
2965:
2966: if (defined($courseopt)) {
1.515 raeburn 2967: if (defined($$courseopt{$courselevelm})) {
2968: return $$courseopt{$courselevelm};
1.485 foxr 2969: }
1.516 raeburn 2970: unless ($recursed) {
2971: @recurseup = $self->recurseup_maps($mapname);
2972: $recursed = 1;
2973: }
2974: if (@recurseup) {
2975: foreach my $item (@recurseup) {
2976: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2977: last if (defined($$courseopt{$norecursechk}));
2978: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2979: if (defined($$courseopt{$recursechk})) {
2980: return $$courseopt{$recursechk};
2981: }
2982: }
2983: }
1.485 foxr 2984: }
1.516 raeburn 2985: return undef; # Undefined if we got here.
1.485 foxr 2986: }
2987:
2988: sub course_printdates {
2989: my ($self, $symb, $part) = @_;
2990:
2991:
2992: my $opendate = $self->getcourseparam($symb, $part . '.printstartdate');
2993: my $closedate = $self->getcourseparam($symb, $part . '.printenddate');
2994: return ($opendate, $closedate);
2995:
2996: }
2997:
2998: sub getcourseparam {
2999: my ($self, $symb, $what) = @_;
3000:
3001: $self->generate_course_user_opt(); # If necessary populate the hashes.
3002:
3003: my $uname = $self->{USERNAME};
3004: my $udom = $self->{DOMAIN};
3005:
3006: # Course, section, group ids come from the env:
3007:
3008: my $cid = $env{'request.course.id'};
3009: my $csec = $env{'request.course.sec'};
3010: my $cgroup = ''; # Assume no group
3011:
3012: my @cgroups = split(/:/, $env{'request.course.groups'});
3013: if(@cgroups > 0) {
3014: @cgroups = sort(@cgroups);
3015: $cgroup = $cgroups[0]; # There is a course group.
3016: }
3017: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
3018: $mapname = &Apache::lonnet::deversion($mapname);
3019:
3020: #
3021: # Make the various lookup keys:
3022: #
3023:
3024: $what=~s/^parameter\_//;
3025: $what=~s/\_/\./;
3026:
3027: # Local refs to the hashes we're going to look at:
3028:
3029: my $useropt = $self->{USER_OPT};
3030: my $courseopt = $self->{COURSE_OPT};
3031:
3032: #
3033: # We want the course level stuff from the way
3034: # parmval_real operates
1.513 raeburn 3035: # TODO: Factor some of this stuff out of
1.485 foxr 3036: # both parmval_real and here
3037: #
3038: my $courselevel = $cid . '.' . $what;
3039: my $grplevel = $cid . '.[' . $cgroup . ']' . $what;
3040: my $seclevel = $cid . '.[' . $csec . ']' . $what;
3041:
3042:
3043: # Try for the user's course level option:
3044:
3045: if ($uname and defined($useropt)) {
3046: if (defined($$useropt{$courselevel})) {
3047: return $$useropt{$courselevel};
3048: }
3049: }
3050: # Try for the group's course level option:
3051:
1.513 raeburn 3052: if ($cgroup ne '' and defined($courseopt)) {
1.485 foxr 3053: if (defined($$courseopt{$grplevel})) {
3054: return $$courseopt{$grplevel};
3055: }
3056: }
3057:
3058: # Try for section level parameters:
3059:
1.513 raeburn 3060: if ($csec ne '' and defined($courseopt)) {
1.485 foxr 3061: if (defined($$courseopt{$seclevel})) {
3062: return $$courseopt{$seclevel};
3063: }
3064: }
1.513 raeburn 3065: # Try for 'additional' course parameters:
1.485 foxr 3066:
3067: if (defined($courseopt)) {
3068: if (defined($$courseopt{$courselevel})) {
3069: return $$courseopt{$courselevel};
3070: }
3071: }
3072: return undef;
3073:
3074: }
3075:
1.145 bowersj2 3076:
1.174 albertel 3077: =pod
1.145 bowersj2 3078:
1.352 raeburn 3079: =item * B<getResourceByUrl>(url,multiple):
1.145 bowersj2 3080:
1.352 raeburn 3081: Retrieves a resource object by URL of the resource, unless the optional
1.398 banghart 3082: multiple parameter is included in which case an array of resource
1.352 raeburn 3083: objects is returned. If passed a resource object, it will simply return
3084: it, so it is safe to use this method in code like
3085: "$res = $navmap->getResourceByUrl($res)"
3086: if you're not sure if $res is already an object, or just a URL. If the
3087: resource appears multiple times in the course, only the first instance
3088: will be returned (useful for maps), unless the multiple parameter has
3089: been included, in which case all instances are returned in an array.
1.174 albertel 3090:
1.505 raeburn 3091: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall, noblockcheck):
1.174 albertel 3092:
3093: The map is a specification of a map to retreive the resources from,
3094: either as a url or as an object. The filterFunc is a reference to a
3095: function that takes a resource object as its one argument and returns
3096: true if the resource should be included, or false if it should not
3097: be. If recursive is true, the map will be recursively examined,
3098: otherwise it will not be. If bailout is true, the function will return
1.314 albertel 3099: as soon as it finds a resource, if false it will finish. If showall is
1.505 raeburn 3100: true it will not hide maps that contain nothing but one other map. The
3101: noblockcheck arg is propagated to become the sixth arg in the call to
3102: lonnet::allowed when checking a resource's availability during collection
3103: of resources using the iterator. noblockcheck needs to be true if
3104: retrieveResources() was called by a routine that itself was called by
3105: lonnet::allowed, in order to avoid recursion. By default the map
3106: is the top-level map of the course, filterFunc is a function that
3107: always returns 1, recursive is true, bailout is false, showall is
3108: false. The resources will be returned in a list containing the
3109: resource objects for the corresponding resources, with B<no structure
3110: information> in the list; regardless of branching, recursion, etc.,
3111: it will be a flat list.
1.174 albertel 3112:
3113: Thus, this is suitable for cases where you don't want the structure,
3114: just a list of all resources. It is also suitable for finding out how
3115: many resources match a given description; for this use, if all you
3116: want to know is if I<any> resources match the description, the bailout
3117: parameter will allow you to avoid potentially expensive enumeration of
3118: all matching resources.
1.145 bowersj2 3119:
1.318 albertel 3120: =item * B<hasResource>(map, filterFunc, recursive, showall):
1.145 bowersj2 3121:
1.398 banghart 3122: Convenience method for
1.146 bowersj2 3123:
1.318 albertel 3124: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
1.146 bowersj2 3125:
1.174 albertel 3126: which will tell whether the map has resources matching the description
3127: in the filter function.
1.146 bowersj2 3128:
1.352 raeburn 3129: =item * B<usedVersion>(url):
3130:
3131: Retrieves version infomation for a url. Returns the version (a number, or
3132: the string "mostrecent") for resources which have version information in
3133: the big hash.
1.448 raeburn 3134:
1.145 bowersj2 3135: =cut
3136:
1.277 matthew 3137:
1.145 bowersj2 3138: sub getResourceByUrl {
3139: my $self = shift;
3140: my $resUrl = shift;
1.352 raeburn 3141: my $multiple = shift;
1.145 bowersj2 3142:
3143: if (ref($resUrl)) { return $resUrl; }
3144:
3145: $resUrl = &Apache::lonnet::clutter($resUrl);
3146: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
1.352 raeburn 3147: if (!$resId) { return ''; }
3148: if ($multiple) {
3149: my @resources = ();
3150: my @resIds = split (/,/, $resId);
3151: foreach my $id (@resIds) {
1.353 raeburn 3152: my $resourceId = $self->getById($id);
3153: if ($resourceId) {
3154: push(@resources,$resourceId);
1.352 raeburn 3155: }
3156: }
3157: return @resources;
3158: } else {
3159: if ($resId =~ /,/) {
3160: $resId = (split (/,/, $resId))[0];
3161: }
3162: return $self->getById($resId);
1.145 bowersj2 3163: }
3164: }
3165:
3166: sub retrieveResources {
3167: my $self = shift;
3168: my $map = shift;
3169: my $filterFunc = shift;
3170: if (!defined ($filterFunc)) {
3171: $filterFunc = sub {return 1;};
3172: }
3173: my $recursive = shift;
3174: if (!defined($recursive)) { $recursive = 1; }
3175: my $bailout = shift;
3176: if (!defined($bailout)) { $bailout = 0; }
1.314 albertel 3177: my $showall = shift;
1.506 raeburn 3178: my $noblockcheck = shift;
1.145 bowersj2 3179: # Create the necessary iterator.
3180: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 3181: $map = $self->getResourceByUrl($map);
1.145 bowersj2 3182: }
3183:
1.213 bowersj2 3184: # If nothing was passed, assume top-level map
3185: if (!$map) {
3186: $map = $self->getById('0.0');
3187: }
3188:
1.145 bowersj2 3189: # Check the map's validity.
1.213 bowersj2 3190: if (!$map->is_map()) {
1.145 bowersj2 3191: # Oh, to throw an exception.... how I'd love that!
3192: return ();
3193: }
3194:
1.146 bowersj2 3195: # Get an iterator.
3196: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.314 albertel 3197: undef, $recursive, $showall);
1.146 bowersj2 3198:
3199: my @resources = ();
3200:
1.400 albertel 3201: if (&$filterFunc($map)) {
3202: push(@resources, $map);
3203: }
3204:
1.146 bowersj2 3205: # Run down the iterator and collect the resources.
1.222 bowersj2 3206: my $curRes;
3207:
1.505 raeburn 3208: while ($curRes = $it->next(undef,$noblockcheck)) {
1.146 bowersj2 3209: if (ref($curRes)) {
3210: if (!&$filterFunc($curRes)) {
3211: next;
3212: }
3213:
1.400 albertel 3214: push(@resources, $curRes);
1.146 bowersj2 3215:
3216: if ($bailout) {
3217: return @resources;
3218: }
3219: }
3220:
3221: }
3222:
3223: return @resources;
3224: }
3225:
3226: sub hasResource {
3227: my $self = shift;
3228: my $map = shift;
3229: my $filterFunc = shift;
3230: my $recursive = shift;
1.318 albertel 3231: my $showall = shift;
1.146 bowersj2 3232:
1.318 albertel 3233: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
1.133 bowersj2 3234: }
1.51 bowersj2 3235:
1.352 raeburn 3236: sub usedVersion {
3237: my $self = shift;
3238: my $linkurl = shift;
3239: return $self->navhash("version_$linkurl");
3240: }
3241:
1.51 bowersj2 3242: 1;
3243:
3244: package Apache::lonnavmaps::iterator;
1.365 albertel 3245: use Scalar::Util qw(weaken);
1.320 albertel 3246: use Apache::lonnet;
3247:
1.51 bowersj2 3248: =pod
3249:
3250: =back
3251:
1.174 albertel 3252: =head1 Object: navmap Iterator
1.51 bowersj2 3253:
1.174 albertel 3254: An I<iterator> encapsulates the logic required to traverse a data
3255: structure. navmap uses an iterator to traverse the course map
3256: according to the criteria you wish to use.
3257:
3258: To obtain an iterator, call the B<getIterator>() function of a
3259: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
3260: directly.) This will return a reference to the iterator:
1.51 bowersj2 3261:
3262: C<my $resourceIterator = $navmap-E<gt>getIterator();>
3263:
3264: To get the next thing from the iterator, call B<next>:
3265:
3266: C<my $nextThing = $resourceIterator-E<gt>next()>
3267:
3268: getIterator behaves as follows:
3269:
3270: =over 4
3271:
1.174 albertel 3272: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
3273:
3274: All parameters are optional. firstResource is a resource reference
3275: corresponding to where the iterator should start. It defaults to
3276: navmap->firstResource() for the corresponding nav map. finishResource
3277: corresponds to where you want the iterator to end, defaulting to
3278: navmap->finishResource(). filterHash is a hash used as a set
3279: containing strings representing the resource IDs, defaulting to
3280: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 3281: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 3282: recursed on. If it is a 1, only resources NOT in the filterHash will
3283: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
3284: false (default), the iterator will only return the first level of map
3285: that is not just a single, 'redirecting' map. If true, the iterator
3286: will return all information, starting with the top-level map,
3287: regardless of content. returnTopMap, if true (default false), will
3288: cause the iterator to return the top-level map object (resource 0.0)
3289: before anything else.
3290:
3291: Thus, by default, only top-level resources will be shown. Change the
3292: condition to a 1 without changing the hash, and all resources will be
3293: shown. Changing the condition to 1 and including some values in the
3294: hash will allow you to selectively suppress parts of the navmap, while
3295: leaving it on 0 and adding things to the hash will allow you to
3296: selectively add parts of the nav map. See the handler code for
3297: examples.
3298:
3299: The iterator will return either a reference to a resource object, or a
3300: token representing something in the map, such as the beginning of a
3301: new branch. The possible tokens are:
3302:
3303: =over 4
1.51 bowersj2 3304:
1.222 bowersj2 3305: =item * B<END_ITERATOR>:
3306:
3307: The iterator has returned all that it's going to. Further calls to the
3308: iterator will just produce more of these. This is a "false" value, and
3309: is the only false value the iterator which will be returned, so it can
3310: be used as a loop sentinel.
3311:
1.217 bowersj2 3312: =item * B<BEGIN_MAP>:
1.51 bowersj2 3313:
1.174 albertel 3314: A new map is being recursed into. This is returned I<after> the map
3315: resource itself is returned.
1.51 bowersj2 3316:
1.217 bowersj2 3317: =item * B<END_MAP>:
1.174 albertel 3318:
3319: The map is now done.
1.51 bowersj2 3320:
1.217 bowersj2 3321: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 3322:
1.174 albertel 3323: A branch is now starting. The next resource returned will be the first
3324: in that branch.
1.70 bowersj2 3325:
1.217 bowersj2 3326: =item * B<END_BRANCH>:
1.70 bowersj2 3327:
1.174 albertel 3328: The branch is now done.
1.51 bowersj2 3329:
3330: =back
3331:
1.174 albertel 3332: The tokens are retreivable via methods on the iterator object, i.e.,
3333: $iterator->END_MAP.
1.70 bowersj2 3334:
1.174 albertel 3335: Maps can contain empty resources. The iterator will automatically skip
3336: over such resources, but will still treat the structure
3337: correctly. Thus, a complicated map with several branches, but
3338: consisting entirely of empty resources except for one beginning or
3339: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
3340: but only one resource will be returned.
1.116 bowersj2 3341:
1.242 matthew 3342: =back
3343:
1.222 bowersj2 3344: =head2 Normal Usage
3345:
3346: Normal usage of the iterator object is to do the following:
3347:
3348: my $it = $navmap->getIterator([your params here]);
3349: my $curRes;
3350: while ($curRes = $it->next()) {
3351: [your logic here]
3352: }
3353:
3354: Note that inside of the loop, it's frequently useful to check if
3355: "$curRes" is a reference or not with the reference function; only
3356: resource objects will be references, and any non-references will
3357: be the tokens described above.
3358:
1.505 raeburn 3359: The next() routine can take two (optional) arguments:
3360: closeAllPages - if true will not recurse down a .page
3361: noblockcheck - passed to browsePriv() for passing as sixth arg to
3362: call to lonnet::allowed. This needs to be set if retrieveResources
3363: was already called from another routine called within lonnet::allowed,
3364: so as to prevent recursion.
3365:
1.506 raeburn 3366: Also note there is some old code floating around that tries to track
1.222 bowersj2 3367: the depth of the iterator to see when it's done; do not copy that
1.398 banghart 3368: code. It is difficult to get right and harder to understand than
1.222 bowersj2 3369: this. They should be migrated to this new style.
1.51 bowersj2 3370:
3371: =cut
3372:
3373: # Here are the tokens for the iterator:
3374:
1.222 bowersj2 3375: sub END_ITERATOR { return 0; }
1.51 bowersj2 3376: sub BEGIN_MAP { return 1; } # begining of a new map
3377: sub END_MAP { return 2; } # end of the map
3378: sub BEGIN_BRANCH { return 3; } # beginning of a branch
3379: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 3380: sub FORWARD { return 1; } # go forward
3381: sub BACKWARD { return 2; }
1.51 bowersj2 3382:
1.96 bowersj2 3383: sub min {
3384: (my $a, my $b) = @_;
3385: if ($a < $b) { return $a; } else { return $b; }
3386: }
3387:
1.94 bowersj2 3388: sub new {
3389: # magic invocation to create a class instance
3390: my $proto = shift;
3391: my $class = ref($proto) || $proto;
3392: my $self = {};
3393:
1.300 albertel 3394: weaken($self->{NAV_MAP} = shift);
1.94 bowersj2 3395: return undef unless ($self->{NAV_MAP});
3396:
1.454 www 3397: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3398: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3399:
1.94 bowersj2 3400: # Handle the parameters
3401: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3402: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3403:
3404: # If the given resources are just the ID of the resource, get the
3405: # objects
3406: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3407: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3408: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3409: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3410:
3411: $self->{FILTER} = shift;
3412:
3413: # A hash, used as a set, of resource already seen
3414: $self->{ALREADY_SEEN} = shift;
3415: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
3416: $self->{CONDITION} = shift;
3417:
1.116 bowersj2 3418: # Do we want to automatically follow "redirection" maps?
3419: $self->{FORCE_TOP} = shift;
3420:
1.162 bowersj2 3421: # Do we want to return the top-level map object (resource 0.0)?
3422: $self->{RETURN_0} = shift;
3423: # have we done that yet?
3424: $self->{HAVE_RETURNED_0} = 0;
3425:
1.94 bowersj2 3426: # Now, we need to pre-process the map, by walking forward and backward
3427: # over the parts of the map we're going to look at.
1.96 bowersj2 3428:
1.97 bowersj2 3429: # The processing steps are exactly the same, except for a few small
3430: # changes, so I bundle those up in the following list of two elements:
3431: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
3432: # first_resource).
3433: # This prevents writing nearly-identical code twice.
3434: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
3435: 'FIRST_RESOURCE'],
3436: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
3437: 'FINISH_RESOURCE'] );
3438:
1.98 bowersj2 3439: my $maxDepth = 0; # tracks max depth
3440:
1.116 bowersj2 3441: # If there is only one resource in this map, and it's a map, we
3442: # want to remember that, so the user can ask for the first map
3443: # that isn't just a redirector.
3444: my $resource; my $resourceCount = 0;
3445:
1.209 bowersj2 3446: # Documentation on this algorithm can be found in the CVS repository at
3447: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
3448: # in that file.
1.107 bowersj2 3449: # **1**
3450:
1.97 bowersj2 3451: foreach my $pass (@iterations) {
3452: my $direction = $pass->[0];
3453: my $valName = $pass->[1];
3454: my $nextResourceMethod = $pass->[2];
3455: my $firstResourceName = $pass->[3];
3456:
3457: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
3458: $self->{FIRST_RESOURCE},
3459: $self->{FINISH_RESOURCE},
3460: {}, undef, 0, $direction);
1.96 bowersj2 3461:
1.97 bowersj2 3462: # prime the recursion
3463: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 3464: $iterator->next();
1.97 bowersj2 3465: my $curRes = $iterator->next();
1.222 bowersj2 3466: my $depth = 1;
3467: while ($depth > 0) {
3468: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
3469: if ($curRes == $iterator->END_MAP()) { $depth--; }
3470:
1.97 bowersj2 3471: if (ref($curRes)) {
1.116 bowersj2 3472: # If there's only one resource, this will save it
1.117 bowersj2 3473: # we have to filter empty resources from consideration here,
3474: # or even "empty", redirecting maps have two (start & finish)
3475: # or three (start, finish, plus redirector)
3476: if($direction == FORWARD && $curRes->src()) {
3477: $resource = $curRes; $resourceCount++;
3478: }
1.97 bowersj2 3479: my $resultingVal = $curRes->{DATA}->{$valName};
3480: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 3481: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 3482:
1.116 bowersj2 3483: if ($nextCount == 1) { # **3**
1.97 bowersj2 3484: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
3485: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
3486: }
3487:
1.116 bowersj2 3488: if ($nextCount > 1) { # **4**
1.97 bowersj2 3489: foreach my $res (@{$nextResources}) {
3490: my $current = $res->{DATA}->{$valName} || 999999999;
3491: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
3492: }
3493: }
3494: }
1.96 bowersj2 3495:
1.107 bowersj2 3496: # Assign the final val (**2**)
1.97 bowersj2 3497: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 3498: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
3499: $curRes->{DATA}->{BOT_UP_VAL});
3500:
3501: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
3502: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 3503: }
1.222 bowersj2 3504:
3505: $curRes = $iterator->next();
1.96 bowersj2 3506: }
3507: }
1.94 bowersj2 3508:
1.116 bowersj2 3509: # Check: Was this only one resource, a map?
1.255 albertel 3510: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 3511: my $firstResource = $resource->map_start();
3512: my $finishResource = $resource->map_finish();
1.500 raeburn 3513: return Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3514: $finishResource, $self->{FILTER},
3515: $self->{ALREADY_SEEN},
3516: $self->{CONDITION},
3517: $self->{FORCE_TOP});
1.116 bowersj2 3518: }
3519:
1.98 bowersj2 3520: # Set up some bookkeeping information.
3521: $self->{CURRENT_DEPTH} = 0;
3522: $self->{MAX_DEPTH} = $maxDepth;
3523: $self->{STACK} = [];
3524: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 3525: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 3526:
3527: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
3528: push @{$self->{STACK}}, [];
3529: }
3530:
1.107 bowersj2 3531: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 3532: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
3533: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
3534:
3535: bless ($self);
3536: return $self;
3537: }
3538:
3539: sub next {
3540: my $self = shift;
1.256 albertel 3541: my $closeAllPages=shift;
1.505 raeburn 3542: my $noblockcheck = shift;
1.222 bowersj2 3543: if ($self->{FINISHED}) {
3544: return END_ITERATOR();
3545: }
3546:
1.162 bowersj2 3547: # If we want to return the top-level map object, and haven't yet,
3548: # do so.
3549: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
3550: $self->{HAVE_RETURNED_0} = 1;
1.470 foxr 3551: my $nextTopLevel = $self->{NAV_MAP}->getById('0.0');
1.162 bowersj2 3552: return $self->{NAV_MAP}->getById('0.0');
3553: }
1.401 albertel 3554: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
3555: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
3556: return $self->BEGIN_MAP();
3557: }
1.98 bowersj2 3558:
3559: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3560: # grab the next from the recursive iterator
1.256 albertel 3561: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 3562:
3563: # is it a begin or end map? If so, update the depth
3564: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3565: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3566:
3567: # Are we back at depth 0? If so, stop recursing
3568: if ($self->{RECURSIVE_DEPTH} == 0) {
3569: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3570: }
3571: return $next;
3572: }
3573:
3574: if (defined($self->{FORCE_NEXT})) {
3575: my $tmp = $self->{FORCE_NEXT};
3576: $self->{FORCE_NEXT} = undef;
3577: return $tmp;
3578: }
3579:
3580: # Have we not yet begun? If not, return BEGIN_MAP and
3581: # remember we've started.
3582: if ( !$self->{STARTED} ) {
3583: $self->{STARTED} = 1;
3584: return $self->BEGIN_MAP();
3585: }
3586:
3587: # Here's the guts of the iterator.
3588:
3589: # Find the next resource, if any.
3590: my $found = 0;
3591: my $i = $self->{MAX_DEPTH};
3592: my $newDepth;
3593: my $here;
3594: while ( $i >= 0 && !$found ) {
1.107 bowersj2 3595: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3596: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 3597: $found = 1;
3598: $newDepth = $i;
3599: }
3600: $i--;
3601: }
3602:
3603: # If we still didn't find anything, we're done.
3604: if ( !$found ) {
3605: # We need to get back down to the correct branch depth
3606: if ( $self->{CURRENT_DEPTH} > 0 ) {
3607: $self->{CURRENT_DEPTH}--;
3608: return END_BRANCH();
3609: } else {
1.222 bowersj2 3610: $self->{FINISHED} = 1;
1.98 bowersj2 3611: return END_MAP();
3612: }
3613: }
3614:
1.104 bowersj2 3615: # If this is not a resource, it must be an END_BRANCH marker we want
3616: # to return directly.
1.107 bowersj2 3617: if (!ref($here)) { # **8**
1.104 bowersj2 3618: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3619: $self->{CURRENT_DEPTH}--;
3620: return $here;
3621: }
3622: }
3623:
3624: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3625: $self->{HERE} = $here;
3626:
1.98 bowersj2 3627: # Get to the right level
3628: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3629: push @{$self->{STACK}->[$newDepth]}, $here;
3630: $self->{CURRENT_DEPTH}--;
3631: return END_BRANCH();
3632: }
3633: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3634: push @{$self->{STACK}->[$newDepth]}, $here;
3635: $self->{CURRENT_DEPTH}++;
3636: return BEGIN_BRANCH();
3637: }
3638:
3639: # If we made it here, we have the next resource, and we're at the
3640: # right branch level. So let's examine the resource for where
3641: # we can get to from here.
3642:
3643: # So we need to look at all the resources we can get to from here,
3644: # categorize them if we haven't seen them, remember if we have a new
3645: my $nextUnfiltered = $here->getNext();
1.470 foxr 3646:
3647:
1.104 bowersj2 3648: my $maxDepthAdded = -1;
3649:
1.98 bowersj2 3650: for (@$nextUnfiltered) {
3651: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 3652: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3653: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 3654: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 3655: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 3656: }
3657: }
1.104 bowersj2 3658:
3659: # Is this the end of a branch? If so, all of the resources examined above
1.398 banghart 3660: # led to lower levels than the one we are currently at, so we push a END_BRANCH
1.104 bowersj2 3661: # marker onto the stack so we don't forget.
3662: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3663: # BC branch and gets to C, it will see F as the only next resource, but it's
3664: # one level lower. Thus, this is the end of the branch, since there are no
3665: # more resources added to this level or above.
1.111 bowersj2 3666: # We don't do this if the examined resource is the finish resource,
3667: # because the condition given above is true, but the "END_MAP" will
3668: # take care of things and we should already be at depth 0.
1.104 bowersj2 3669: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3670: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3671: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3672: }
3673:
1.98 bowersj2 3674: # That ends the main iterator logic. Now, do we want to recurse
3675: # down this map (if this resource is a map)?
1.256 albertel 3676: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3677: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3678: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3679: my $firstResource = $self->{HERE}->map_start();
3680: my $finishResource = $self->{HERE}->map_finish();
3681: $self->{RECURSIVE_ITERATOR} =
3682: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3683: $finishResource, $self->{FILTER},
1.314 albertel 3684: $self->{ALREADY_SEEN},
3685: $self->{CONDITION},
3686: $self->{FORCE_TOP});
1.98 bowersj2 3687: }
3688:
1.116 bowersj2 3689: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3690: # Should you ever find you need it, make sure to add an option to the code
3691: # that you can use; other things depend on this behavior.
1.505 raeburn 3692: my $browsePriv = $self->{HERE}->browsePriv($noblockcheck);
1.138 bowersj2 3693: if (!$self->{HERE}->src() ||
3694: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3695: return $self->next($closeAllPages);
1.116 bowersj2 3696: }
3697:
1.98 bowersj2 3698: return $self->{HERE};
3699:
3700: }
3701:
3702: =pod
3703:
1.174 albertel 3704: The other method available on the iterator is B<getStack>, which
3705: returns an array populated with the current 'stack' of maps, as
3706: references to the resource objects. Example: This is useful when
3707: making the navigation map, as we need to check whether we are under a
3708: page map to see if we need to link directly to the resource, or to the
3709: page. The first elements in the array will correspond to the top of
3710: the stack (most inclusive map).
1.98 bowersj2 3711:
3712: =cut
3713:
3714: sub getStack {
3715: my $self=shift;
3716:
3717: my @stack;
3718:
3719: $self->populateStack(\@stack);
3720:
3721: return \@stack;
3722: }
3723:
3724: # Private method: Calls the iterators recursively to populate the stack.
3725: sub populateStack {
3726: my $self=shift;
3727: my $stack = shift;
3728:
3729: push @$stack, $self->{HERE} if ($self->{HERE});
3730:
3731: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3732: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3733: }
1.94 bowersj2 3734: }
3735:
3736: 1;
3737:
3738: package Apache::lonnavmaps::DFSiterator;
1.365 albertel 3739: use Scalar::Util qw(weaken);
1.320 albertel 3740: use Apache::lonnet;
3741:
1.100 bowersj2 3742: # Not documented in the perldoc: This is a simple iterator that just walks
3743: # through the nav map and presents the resources in a depth-first search
3744: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3745: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3746: # useful for pre-processing of some kind, and is in fact used by the main
3747: # iterator that way, but that's about it.
3748: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3749: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3750: # use might be found for it. - Jeremy
1.94 bowersj2 3751:
1.117 bowersj2 3752: # Unlike the main iterator, this DOES return all resources, even blank ones.
3753: # The main iterator needs them to correctly preprocess the map.
3754:
1.94 bowersj2 3755: sub BEGIN_MAP { return 1; } # begining of a new map
3756: sub END_MAP { return 2; } # end of the map
3757: sub FORWARD { return 1; } # go forward
3758: sub BACKWARD { return 2; }
3759:
1.100 bowersj2 3760: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3761: # filter hash ref (or undef), already seen hash or undef, condition
3762: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3763: sub new {
3764: # magic invocation to create a class instance
3765: my $proto = shift;
3766: my $class = ref($proto) || $proto;
3767: my $self = {};
3768:
1.300 albertel 3769: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3770: return undef unless ($self->{NAV_MAP});
3771:
1.454 www 3772: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3773: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3774:
1.51 bowersj2 3775: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3776: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3777:
3778: # If the given resources are just the ID of the resource, get the
3779: # objects
3780: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3781: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3782: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3783: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3784:
3785: $self->{FILTER} = shift;
3786:
3787: # A hash, used as a set, of resource already seen
3788: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3789: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3790: $self->{CONDITION} = shift;
1.89 bowersj2 3791: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3792:
1.100 bowersj2 3793: # Flag: Have we started yet?
1.51 bowersj2 3794: $self->{STARTED} = 0;
3795:
3796: # Should we continue calling the recursive iterator, if any?
3797: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3798: # The recursive iterator, if any
3799: $self->{RECURSIVE_ITERATOR} = undef;
3800: # Are we recursing on a map, or a branch?
3801: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3802: # And the count of how deep it is, so that this iterator can keep track of
3803: # when to pick back up again.
3804: $self->{RECURSIVE_DEPTH} = 0;
3805:
3806: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3807: $self->{STACK} = [];
1.51 bowersj2 3808:
3809: # Start with the first resource
1.89 bowersj2 3810: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3811: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3812: } else {
1.100 bowersj2 3813: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3814: }
1.51 bowersj2 3815:
3816: bless($self);
3817: return $self;
3818: }
3819:
3820: sub next {
3821: my $self = shift;
3822:
3823: # Are we using a recursive iterator? If so, pull from that and
3824: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3825: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3826: # grab the next from the recursive iterator
3827: my $next = $self->{RECURSIVE_ITERATOR}->next();
3828:
3829: # is it a begin or end map? Update depth if so
3830: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3831: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3832:
3833: # Are we back at depth 0? If so, stop recursing.
3834: if ($self->{RECURSIVE_DEPTH} == 0) {
3835: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3836: }
3837:
3838: return $next;
3839: }
3840:
3841: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3842: # END_MAP, which will end the iterator.
3843: if (scalar(@{$self->{STACK}}) == 0) {
3844: return $self->END_MAP();
1.51 bowersj2 3845: }
3846:
3847: # Have we not yet begun? If not, return BEGIN_MAP and
3848: # remember that we've started.
3849: if ( !$self->{STARTED} ) {
3850: $self->{STARTED} = 1;
3851: return $self->BEGIN_MAP;
3852: }
3853:
3854: # Get the next resource in the branch
1.100 bowersj2 3855: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3856:
1.100 bowersj2 3857: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3858: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3859:
3860: # Get the next possible resources
1.90 bowersj2 3861: my $nextUnfiltered;
1.89 bowersj2 3862: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3863: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3864: } else {
1.90 bowersj2 3865: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3866: }
1.51 bowersj2 3867: my $next = [];
3868:
3869: # filter the next possibilities to remove things we've
1.100 bowersj2 3870: # already seen.
1.394 raeburn 3871: foreach my $item (@$nextUnfiltered) {
3872: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
3873: push @$next, $item;
1.52 bowersj2 3874: }
1.51 bowersj2 3875: }
3876:
3877: while (@$next) {
1.100 bowersj2 3878: # copy the next possibilities over to the stack
3879: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3880: }
3881:
3882: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3883: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3884: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3885: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3886: my $firstResource = $self->{HERE}->map_start();
3887: my $finishResource = $self->{HERE}->map_finish();
3888:
3889: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3890: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3891: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3892: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3893: }
3894:
3895: return $self->{HERE};
1.190 bowersj2 3896: }
3897:
3898: # Identical to the full iterator methods of the same name. Hate to copy/paste
3899: # but I also hate to "inherit" either iterator from the other.
3900:
3901: sub getStack {
3902: my $self=shift;
3903:
3904: my @stack;
3905:
3906: $self->populateStack(\@stack);
3907:
3908: return \@stack;
3909: }
3910:
3911: # Private method: Calls the iterators recursively to populate the stack.
3912: sub populateStack {
3913: my $self=shift;
3914: my $stack = shift;
3915:
3916: push @$stack, $self->{HERE} if ($self->{HERE});
3917:
3918: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3919: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3920: }
1.51 bowersj2 3921: }
3922:
1.1 www 3923: 1;
1.2 www 3924:
1.51 bowersj2 3925: package Apache::lonnavmaps::resource;
1.365 albertel 3926: use Scalar::Util qw(weaken);
1.51 bowersj2 3927: use Apache::lonnet;
3928:
3929: =pod
3930:
1.217 bowersj2 3931: =head1 Object: resource
1.51 bowersj2 3932:
1.217 bowersj2 3933: X<resource, navmap object>
1.174 albertel 3934: A resource object encapsulates a resource in a resource map, allowing
3935: easy manipulation of the resource, querying the properties of the
3936: resource (including user properties), and represents a reference that
3937: can be used as the canonical representation of the resource by
3938: lonnavmap clients like renderers.
3939:
3940: A resource only makes sense in the context of a navmap, as some of the
3941: data is stored in the navmap object.
3942:
3943: You will probably never need to instantiate this object directly. Use
3944: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3945: starting resource.
1.51 bowersj2 3946:
1.188 bowersj2 3947: Resource objects respect the parameter_hiddenparts, which suppresses
3948: various parts according to the wishes of the map author. As of this
3949: writing, there is no way to override this parameter, and suppressed
3950: parts will never be returned, nor will their response types or ids be
3951: stored.
3952:
1.217 bowersj2 3953: =head2 Overview
1.51 bowersj2 3954:
1.217 bowersj2 3955: A B<Resource> is the most granular type of object in LON-CAPA that can
3956: be included in a course. It can either be a particular resource, like
3957: an HTML page, external resource, problem, etc., or it can be a
3958: container sequence, such as a "page" or a "map".
3959:
3960: To see a sequence from the user's point of view, please see the
3961: B<Creating a Course: Maps and Sequences> chapter of the Author's
3962: Manual.
3963:
3964: A Resource Object, once obtained from a navmap object via a B<getBy*>
3965: method of the navmap, or from an iterator, allows you to query
3966: information about that resource.
3967:
3968: Generally, you do not ever want to create a resource object yourself,
3969: so creation has been left undocumented. Always retrieve resources
3970: from navmap objects.
3971:
3972: =head3 Identifying Resources
3973:
3974: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3975: unique to that resource for a given course. X<resource ID, in big hash>
3976: The Resource ID has the form #.#, where the first number is the same
3977: for every resource in a map, and the second is unique. For instance,
3978: for a course laid out like this:
3979:
3980: * Problem 1
3981: * Map
3982: * Resource 2
3983: * Resource 3
3984:
3985: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3986: C<Resource 3> will share a first number. The second number may end up
3987: re-used between the two groups.
3988:
3989: The resource ID is only used in the big hash, but can be used in the
3990: context of a course to identify a resource easily. (For instance, the
3991: printing system uses it to record which resources from a sequence you
3992: wish to print.)
3993:
3994: X<symb> X<resource, symb>
3995: All resources also have B<symb>s, which uniquely identify a resource
3996: in a course. Many internal LON-CAPA functions expect a symb. A symb
3997: carries along with it the URL of the resource, and the map it appears
1.398 banghart 3998: in. Symbs are much larger than resource IDs.
1.51 bowersj2 3999:
4000: =cut
4001:
4002: sub new {
4003: # magic invocation to create a class instance
4004: my $proto = shift;
4005: my $class = ref($proto) || $proto;
4006: my $self = {};
4007:
1.300 albertel 4008: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 4009: $self->{ID} = shift;
4010:
1.454 www 4011: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
4012: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
4013:
1.51 bowersj2 4014: # Store this new resource in the parent nav map's cache.
4015: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 4016: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 4017:
1.479 raeburn 4018: $self->{DUEDATE_CACHE} = undef;
4019:
1.51 bowersj2 4020: # A hash that can be used by two-pass algorithms to store data
4021: # about this resource in. Not used by the resource object
4022: # directly.
4023: $self->{DATA} = {};
1.508 damieng 4024:
1.51 bowersj2 4025: bless($self);
4026:
1.508 damieng 4027: # This is a speed optimization, to avoid calling symb() too often.
4028: $self->{SYMB} = $self->symb();
1.515 raeburn 4029:
1.51 bowersj2 4030: return $self;
4031: }
4032:
1.70 bowersj2 4033: # private function: simplify the NAV_HASH lookups we keep doing
4034: # pass the name, and to automatically append my ID, pass a true val on the
4035: # second param
4036: sub navHash {
4037: my $self = shift;
4038: my $param = shift;
4039: my $id = shift;
1.441 raeburn 4040: my $arg = $param . ($id?$self->{ID}:"");
1.451 raeburn 4041: if (ref($self) && ref($self->{NAV_MAP}) && defined($arg)) {
1.441 raeburn 4042: return $self->{NAV_MAP}->navhash($arg);
4043: }
4044: return;
1.70 bowersj2 4045: }
4046:
1.51 bowersj2 4047: =pod
4048:
1.217 bowersj2 4049: =head2 Methods
1.70 bowersj2 4050:
1.217 bowersj2 4051: Once you have a resource object, here's what you can do with it:
4052:
4053: =head3 Attribute Retrieval
4054:
4055: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 4056:
4057: =over 4
4058:
1.217 bowersj2 4059: =item * B<ID>: Every resource has an ID that is unique for that
4060: resource in the course it is in. The ID is actually in the hash
4061: representing the resource, so for a resource object $res, obtain
4062: it via C<$res->{ID}).
4063:
1.174 albertel 4064: =item * B<compTitle>:
4065:
4066: Returns a "composite title", that is equal to $res->title() if the
4067: resource has a title, and is otherwise the last part of the URL (e.g.,
4068: "problem.problem").
4069:
4070: =item * B<ext>:
4071:
4072: Returns true if the resource is external.
4073:
4074: =item * B<kind>:
4075:
4076: Returns the kind of the resource from the compiled nav map.
4077:
4078: =item * B<randomout>:
1.106 bowersj2 4079:
1.174 albertel 4080: Returns true if this resource was chosen to NOT be shown to the user
4081: by the random map selection feature. In other words, this is usually
4082: false.
1.70 bowersj2 4083:
1.174 albertel 4084: =item * B<randompick>:
1.70 bowersj2 4085:
1.400 albertel 4086: Returns the number of randomly picked items for a map if the randompick
4087: feature is being used on the map.
4088:
4089: =item * B<randomorder>:
4090:
4091: Returns true for a map if the randomorder feature is being used on the
4092: map.
1.70 bowersj2 4093:
1.174 albertel 4094: =item * B<src>:
1.51 bowersj2 4095:
1.174 albertel 4096: Returns the source for the resource.
1.70 bowersj2 4097:
1.174 albertel 4098: =item * B<symb>:
1.70 bowersj2 4099:
1.174 albertel 4100: Returns the symb for the resource.
1.70 bowersj2 4101:
1.174 albertel 4102: =item * B<title>:
1.70 bowersj2 4103:
1.174 albertel 4104: Returns the title of the resource.
4105:
1.51 bowersj2 4106: =back
4107:
4108: =cut
4109:
4110: # These info functions can be used directly, as they don't return
4111: # resource information.
1.85 bowersj2 4112: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.303 albertel 4113: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
1.70 bowersj2 4114: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 4115: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 4116: # considered private and undocumented
1.51 bowersj2 4117: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
4118: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 4119: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
4120: sub randompick {
4121: my $self = shift;
1.410 raeburn 4122: my $randompick = $self->parmval('randompick');
4123: return $randompick;
1.68 bowersj2 4124: }
1.400 albertel 4125: sub randomorder {
4126: my $self = shift;
1.410 raeburn 4127: my $randomorder = $self->parmval('randomorder');
4128: return ($randomorder =~ /^yes$/i);
1.400 albertel 4129: }
1.303 albertel 4130: sub link {
4131: my $self=shift;
4132: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
4133: return $self->src;
4134: }
1.51 bowersj2 4135: sub src {
4136: my $self=shift;
4137: return $self->navHash("src_", 1);
4138: }
1.303 albertel 4139: sub shown_symb {
4140: my $self=shift;
1.508 damieng 4141: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->{SYMB});}
4142: return $self->{SYMB};
1.303 albertel 4143: }
1.328 www 4144: sub id {
4145: my $self=shift;
4146: return $self->{ID};
4147: }
4148: sub enclosing_map_src {
4149: my $self=shift;
4150: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4151: return $self->navHash('map_id_'.$first);
4152: }
1.51 bowersj2 4153: sub symb {
4154: my $self=shift;
1.523 damieng 4155: if (defined $self->{SYMB}) { return $self->{SYMB}; }
1.51 bowersj2 4156: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4157: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 4158: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 4159: . '___' . $second . '___' . $symbSrc;
1.223 albertel 4160: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 4161: }
1.321 raeburn 4162: sub wrap_symb {
4163: my $self = shift;
1.508 damieng 4164: return $self->{NAV_MAP}->wrap_symb($self->{SYMB});
1.321 raeburn 4165: }
1.213 bowersj2 4166: sub title {
4167: my $self=shift;
4168: if ($self->{ID} eq '0.0') {
4169: # If this is the top-level map, return the title of the course
4170: # since this map can not be titled otherwise.
1.320 albertel 4171: return $env{'course.'.$env{'request.course.id'}.'.description'};
1.213 bowersj2 4172: }
4173: return $self->navHash("title_", 1); }
1.217 bowersj2 4174: # considered private and undocumented
1.70 bowersj2 4175: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.301 albertel 4176: sub condition {
4177: my $self=shift;
4178: my $undercond=$self->navHash("undercond_", 1);
4179: if (!defined($undercond)) { return 1; };
4180: my $condid=$self->navHash("condid_$undercond");
4181: if (!defined($condid)) { return 1; };
4182: my $condition=&Apache::lonnet::directcondval($condid);
4183: return $condition;
4184: }
1.342 albertel 4185: sub condval {
4186: my $self=shift;
1.359 albertel 4187: my ($pathname,$filename) =
4188: &Apache::lonnet::split_uri_for_cond($self->src());
1.342 albertel 4189:
4190: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4191: /\&\Q$filename\E\:([\d\|]+)\&/);
4192: if ($match) {
4193: return &Apache::lonnet::condval($1);
4194: }
4195: return 0;
4196: }
1.106 bowersj2 4197: sub compTitle {
4198: my $self = shift;
4199: my $title = $self->title();
1.176 www 4200: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 4201: if (!$title) {
4202: $title = $self->src();
4203: $title = substr($title, rindex($title, '/') + 1);
4204: }
4205: return $title;
4206: }
1.399 albertel 4207:
1.70 bowersj2 4208: =pod
4209:
4210: B<Predicate Testing the Resource>
4211:
4212: These methods are shortcuts to deciding if a given resource has a given property.
4213:
4214: =over 4
4215:
1.174 albertel 4216: =item * B<is_map>:
4217:
4218: Returns true if the resource is a map type.
4219:
4220: =item * B<is_problem>:
1.70 bowersj2 4221:
1.174 albertel 4222: Returns true if the resource is a problem type, false
4223: otherwise. (Looks at the extension on the src field; might need more
4224: to work correctly.)
1.70 bowersj2 4225:
1.174 albertel 4226: =item * B<is_page>:
1.70 bowersj2 4227:
1.174 albertel 4228: Returns true if the resource is a page.
4229:
4230: =item * B<is_sequence>:
4231:
4232: Returns true if the resource is a sequence.
1.70 bowersj2 4233:
4234: =back
4235:
4236: =cut
4237:
1.256 albertel 4238: sub hasResource {
4239: my $self = shift;
4240: return $self->{NAV_MAP}->hasResource(@_);
4241: }
4242:
4243: sub retrieveResources {
4244: my $self = shift;
4245: return $self->{NAV_MAP}->retrieveResources(@_);
4246: }
1.70 bowersj2 4247:
1.369 albertel 4248: sub is_exam {
4249: my ($self,$part) = @_;
1.410 raeburn 4250: my $type = $self->parmval('type',$part);
4251: if ($type eq 'exam') {
1.369 albertel 4252: return 1;
4253: }
4254: if ($self->src() =~ /\.(exam)$/) {
4255: return 1;
4256: }
4257: return 0;
4258: }
1.70 bowersj2 4259: sub is_html {
1.51 bowersj2 4260: my $self=shift;
4261: my $src = $self->src();
1.70 bowersj2 4262: return ($src =~ /html$/);
1.51 bowersj2 4263: }
1.70 bowersj2 4264: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
4265: sub is_page {
1.51 bowersj2 4266: my $self=shift;
4267: my $src = $self->src();
1.205 bowersj2 4268: return $self->navHash("is_map_", 1) &&
4269: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 4270: }
1.361 albertel 4271: sub is_practice {
4272: my $self=shift;
4273: my ($part) = @_;
1.410 raeburn 4274: my $type = $self->parmval('type',$part);
4275: if ($type eq 'practice') {
1.361 albertel 4276: return 1;
4277: }
4278: return 0;
4279: }
1.70 bowersj2 4280: sub is_problem {
1.51 bowersj2 4281: my $self=shift;
4282: my $src = $self->src();
1.466 www 4283: if ($src =~ /$LONCAPA::assess_re/) {
1.361 albertel 4284: return !($self->is_practice());
4285: }
4286: return 0;
1.256 albertel 4287: }
1.443 foxr 4288: #
4289: # The has below is the set of status that are considered 'incomplete'
4290: #
4291: my %incomplete_hash =
4292: (
4293: TRIES_LEFT() => 1,
4294: OPEN() => 1,
4295: ATTEMPTED() => 1
4296:
4297: );
4298: #
4299: # Return tru if a problem is incomplete... for now incomplete means that
4300: # any part of the problem is incomplete.
4301: # Note that if the resources is not a problem, 0 is returned.
4302: #
4303: sub is_incomplete {
4304: my $self = shift;
4305: if ($self->is_problem()) {
4306: foreach my $part (@{$self->parts()}) {
4307: if (exists($incomplete_hash{$self->status($part)})) {
4308: return 1;
4309: }
4310: }
4311: }
4312: return 0;
4313:
4314: }
1.413 www 4315: sub is_raw_problem {
4316: my $self=shift;
4317: my $src = $self->src();
1.466 www 4318: if ($src =~ /$LONCAPA::assess_re/) {
1.413 www 4319: return 1;
4320: }
4321: return 0;
4322: }
4323:
1.256 albertel 4324: sub contains_problem {
4325: my $self=shift;
4326: if ($self->is_page()) {
4327: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
4328: return $hasProblem;
4329: }
4330: return 0;
1.51 bowersj2 4331: }
1.401 albertel 4332: sub map_contains_problem {
4333: my $self=shift;
4334: if ($self->is_map()) {
4335: my $has_problem=
4336: $self->hasResource($self,sub { $_[0]->is_problem() },1);
4337: return $has_problem;
4338: }
4339: return 0;
4340: }
1.70 bowersj2 4341: sub is_sequence {
1.51 bowersj2 4342: my $self=shift;
1.205 bowersj2 4343: return $self->navHash("is_map_", 1) &&
1.426 droeschl 4344: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 4345: }
1.261 matthew 4346: sub is_survey {
4347: my $self = shift();
4348: my $part = shift();
1.410 raeburn 4349: my $type = $self->parmval('type',$part);
1.444 raeburn 4350: if (($type eq 'survey') || ($type eq 'surveycred')) {
1.261 matthew 4351: return 1;
4352: }
1.263 albertel 4353: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 4354: return 1;
4355: }
4356: return 0;
4357: }
1.444 raeburn 4358: sub is_anonsurvey {
4359: my $self = shift();
4360: my $part = shift();
4361: my $type = $self->parmval('type',$part);
4362: if (($type eq 'anonsurvey') || ($type eq 'anonsurveycred')) {
4363: return 1;
4364: }
4365: return 0;
4366: }
1.360 albertel 4367: sub is_task {
4368: my $self=shift;
4369: my $src = $self->src();
4370: return ($src =~ /\.(task)$/)
4371: }
1.51 bowersj2 4372:
1.266 raeburn 4373: sub is_empty_sequence {
4374: my $self=shift;
4375: my $src = $self->src();
4376: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
4377: }
4378:
1.101 bowersj2 4379: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 4380: sub parmval {
4381: my $self = shift;
4382: my $what = shift;
1.185 bowersj2 4383: my $part = shift;
4384: if (!defined($part)) {
4385: $part = '0';
4386: }
1.508 damieng 4387: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->{SYMB});
1.51 bowersj2 4388: }
4389:
1.70 bowersj2 4390: =pod
4391:
4392: B<Map Methods>
4393:
1.174 albertel 4394: These methods are useful for getting information about the map
4395: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 4396:
4397: =over 4
4398:
1.174 albertel 4399: =item * B<map_finish>:
4400:
4401: Returns a reference to a resource object corresponding to the finish
4402: resource of the map.
1.70 bowersj2 4403:
1.174 albertel 4404: =item * B<map_pc>:
1.70 bowersj2 4405:
1.174 albertel 4406: Returns the pc value of the map, which is the first number that
4407: appears in the resource ID of the resources in the map, and is the
4408: number that appears around the middle of the symbs of the resources in
4409: that map.
1.70 bowersj2 4410:
1.174 albertel 4411: =item * B<map_start>:
4412:
4413: Returns a reference to a resource object corresponding to the start
4414: resource of the map.
4415:
4416: =item * B<map_type>:
4417:
4418: Returns a string with the type of the map in it.
1.70 bowersj2 4419:
1.497 raeburn 4420: =item * B<map_hierarchy>:
1.448 raeburn 4421:
4422: Returns a string with a comma-separated ordered list of map_pc IDs
4423: for the hierarchy of maps containing a map, with the top level
4424: map first, then descending to deeper levels, with the enclosing map last.
4425:
1.70 bowersj2 4426: =back
1.51 bowersj2 4427:
1.70 bowersj2 4428: =cut
1.51 bowersj2 4429:
4430: sub map_finish {
4431: my $self = shift;
4432: my $src = $self->src();
1.381 albertel 4433: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 4434: my $res = $self->navHash("map_finish_$src", 0);
4435: $res = $self->{NAV_MAP}->getById($res);
4436: return $res;
4437: }
1.70 bowersj2 4438: sub map_pc {
4439: my $self = shift;
1.381 albertel 4440: my $src = $self->src();
1.70 bowersj2 4441: return $self->navHash("map_pc_$src", 0);
4442: }
1.51 bowersj2 4443: sub map_start {
4444: my $self = shift;
4445: my $src = $self->src();
1.381 albertel 4446: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 4447: my $res = $self->navHash("map_start_$src", 0);
4448: $res = $self->{NAV_MAP}->getById($res);
4449: return $res;
4450: }
4451: sub map_type {
4452: my $self = shift;
4453: my $pc = $self->map_pc();
4454: return $self->navHash("map_type_$pc", 0);
4455: }
1.448 raeburn 4456: sub map_hierarchy {
4457: my $self = shift;
4458: my $pc = $self->map_pc();
4459: return $self->navHash("map_hierarchy_$pc", 0);
4460: }
1.51 bowersj2 4461:
4462: #####
4463: # Property queries
4464: #####
4465:
4466: # These functions will be responsible for returning the CORRECT
4467: # VALUE for the parameter, no matter what. So while they may look
1.398 banghart 4468: # like direct calls to parmval, they can be more than that.
1.51 bowersj2 4469: # So, for instance, the duedate function should use the "duedatetype"
1.398 banghart 4470: # information, rather than the resource object user.
1.51 bowersj2 4471:
4472: =pod
4473:
4474: =head2 Resource Parameters
4475:
1.174 albertel 4476: In order to use the resource parameters correctly, the nav map must
4477: have been instantiated with genCourseAndUserOptions set to true, so
4478: the courseopt and useropt is read correctly. Then, you can call these
4479: functions to get the relevant parameters for the resource. Each
4480: function defaults to part "0", but can be directed to another part by
4481: passing the part as the parameter.
4482:
4483: These methods are responsible for getting the parameter correct, not
4484: merely reflecting the contents of the GDBM hashes. As we move towards
4485: dates relative to other dates, these methods should be updated to
4486: reflect that. (Then, anybody using these methods will not have to update
4487: their code.)
4488:
4489: =over 4
4490:
1.485 foxr 4491:
1.459 foxr 4492: =item * B<printable>
4493:
4494: returns true if the current date is such that the
4495: specified resource part is printable.
4496:
1.485 foxr 4497:
1.459 foxr 4498: =item * B<resprintable>
4499:
4500: Returns true if all parts in the resource are printable making the
4501: entire resource printable.
4502:
4503: =item * B<acc>
1.174 albertel 4504:
4505: Get the Client IP/Name Access Control information.
1.51 bowersj2 4506:
1.174 albertel 4507: =item * B<answerdate>:
1.51 bowersj2 4508:
1.174 albertel 4509: Get the answer-reveal date for the problem.
4510:
1.211 bowersj2 4511: =item * B<awarded>:
4512:
4513: Gets the awarded value for the problem part. Requires genUserData set to
4514: true when the navmap object was created.
4515:
1.174 albertel 4516: =item * B<duedate>:
4517:
4518: Get the due date for the problem.
4519:
4520: =item * B<tries>:
4521:
4522: Get the number of tries the student has used on the problem.
4523:
4524: =item * B<maxtries>:
4525:
4526: Get the number of max tries allowed.
4527:
4528: =item * B<opendate>:
1.51 bowersj2 4529:
1.174 albertel 4530: Get the open date for the problem.
1.51 bowersj2 4531:
1.174 albertel 4532: =item * B<sig>:
1.51 bowersj2 4533:
1.174 albertel 4534: Get the significant figures setting.
1.51 bowersj2 4535:
1.174 albertel 4536: =item * B<tol>:
1.51 bowersj2 4537:
1.174 albertel 4538: Get the tolerance for the problem.
1.51 bowersj2 4539:
1.174 albertel 4540: =item * B<tries>:
1.51 bowersj2 4541:
1.174 albertel 4542: Get the number of tries the user has already used on the problem.
1.51 bowersj2 4543:
1.174 albertel 4544: =item * B<type>:
1.51 bowersj2 4545:
1.174 albertel 4546: Get the question type for the problem.
1.70 bowersj2 4547:
1.174 albertel 4548: =item * B<weight>:
1.51 bowersj2 4549:
1.174 albertel 4550: Get the weight for the problem.
1.51 bowersj2 4551:
4552: =back
4553:
4554: =cut
4555:
1.485 foxr 4556:
4557:
4558:
1.459 foxr 4559: sub printable {
4560:
4561: my ($self, $part) = @_;
4562:
4563: # The following cases apply:
1.487 foxr 4564: # - If a start date is not set, it is replaced by the open date.
4565: # - Ditto for start/open replaced by content open.
4566: # - If neither start nor printdates are set the part is printable.
1.459 foxr 4567: # - Start date set but no end date: Printable if now >= start date.
4568: # - End date set but no start date: Printable if now <= end date.
4569: # - both defined: printable if start <= now <= end
4570: #
1.487 foxr 4571:
4572: # Get the print open/close dates for the resource.
4573:
4574: my $start = $self->parmval("printstartdate", $part);
4575: my $end = $self->parmval("printenddate", $part);
4576:
4577: if (!$start) {
4578: $start = $self->parmval("opendate", $part);
4579: }
4580: if (!$start) {
4581: $start = $self->parmval("contentopen", $part);
4582: }
4583:
4584:
1.459 foxr 4585: my $now = time();
4586:
1.487 foxr 4587:
1.459 foxr 4588: my $startok = 1;
4589: my $endok = 1;
4590:
1.460 foxr 4591: if ((defined $start) && ($start ne '')) {
1.459 foxr 4592: $startok = $start <= $now;
4593: }
1.460 foxr 4594: if ((defined $end) && ($end != '')) {
1.459 foxr 4595: $endok = $end >= $now;
4596: }
4597: return $startok && $endok;
4598: }
4599:
4600: sub resprintable {
4601: my $self = shift;
4602:
4603: # get parts...or realize there are no parts.
4604:
1.460 foxr 4605: my $partsref = $self->parts();
4606: my @parts = @$partsref;
4607:
1.489 raeburn 4608: if (!@parts) {
1.459 foxr 4609: return $self->printable(0);
4610: } else {
1.460 foxr 4611: foreach my $part (@parts) {
4612: if (!$self->printable($part)) {
4613: return 0;
4614: }
1.459 foxr 4615: }
4616: return 1;
4617: }
4618: }
4619:
1.51 bowersj2 4620: sub acc {
4621: (my $self, my $part) = @_;
1.410 raeburn 4622: my $acc = $self->parmval("acc", $part);
4623: return $acc;
1.51 bowersj2 4624: }
4625: sub answerdate {
4626: (my $self, my $part) = @_;
4627: # Handle intervals
1.410 raeburn 4628: my $answerdatetype = $self->parmval("answerdate.type", $part);
4629: my $answerdate = $self->parmval("answerdate", $part);
4630: my $duedate = $self->parmval("duedate", $part);
4631: if ($answerdatetype eq 'date_interval') {
4632: $answerdate = $duedate + $answerdate;
1.51 bowersj2 4633: }
1.410 raeburn 4634: return $answerdate;
1.106 bowersj2 4635: }
1.211 bowersj2 4636: sub awarded {
4637: my $self = shift; my $part = shift;
1.221 bowersj2 4638: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 4639: if (!defined($part)) { $part = '0'; }
1.508 damieng 4640: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.awarded'};
1.211 bowersj2 4641: }
1.432 raeburn 4642: sub taskversion {
4643: my $self = shift; my $part = shift;
4644: $self->{NAV_MAP}->get_user_data();
4645: if (!defined($part)) { $part = '0'; }
1.508 damieng 4646: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.version'};
1.432 raeburn 4647: }
4648: sub taskstatus {
4649: my $self = shift; my $part = shift;
4650: $self->{NAV_MAP}->get_user_data();
4651: if (!defined($part)) { $part = '0'; }
1.508 damieng 4652: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
1.432 raeburn 4653: }
4654: sub solved {
4655: my $self = shift; my $part = shift;
4656: $self->{NAV_MAP}->get_user_data();
4657: if (!defined($part)) { $part = '0'; }
1.508 damieng 4658: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.solved'};
1.432 raeburn 4659: }
4660: sub checkedin {
4661: my $self = shift; my $part = shift;
4662: $self->{NAV_MAP}->get_user_data();
4663: if (!defined($part)) { $part = '0'; }
4664: if ($self->is_task()) {
4665: my $version = $self->taskversion($part);
1.508 damieng 4666: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
1.432 raeburn 4667: } else {
1.508 damieng 4668: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin.slot'});
1.432 raeburn 4669: }
4670: }
1.382 albertel 4671: # this should work exactly like the copy in lonhomework.pm
1.459 foxr 4672: # Why is there a copy in lonhomework? Why not centralized?
4673: #
4674: # TODO: Centralize duedate.
4675: #
4676:
1.51 bowersj2 4677: sub duedate {
4678: (my $self, my $part) = @_;
1.479 raeburn 4679: if (defined ($self->{DUEDATE_CACHE}->{$part})) {
4680: return $self->{DUEDATE_CACHE}->{$part};
4681: }
1.382 albertel 4682: my $date;
1.406 albertel 4683: my @interval=$self->parmval("interval", $part);
1.382 albertel 4684: my $due_date=$self->parmval("duedate", $part);
1.520 raeburn 4685: if ($interval[0] =~ /^(\d+)/) {
4686: my $timelimit = $1;
4687: my $first_access=&Apache::lonnet::get_first_access($interval[1],
4688: $self->{SYMB});
1.382 albertel 4689: if (defined($first_access)) {
1.520 raeburn 4690: my $interval = $first_access+$timelimit;
1.404 albertel 4691: $date = (!$due_date || $interval < $due_date) ? $interval
4692: : $due_date;
1.382 albertel 4693: } else {
4694: $date = $due_date;
4695: }
4696: } else {
4697: $date = $due_date;
1.260 albertel 4698: }
1.479 raeburn 4699: $self->{DUEDATE_CACHE}->{$part} = $date;
1.382 albertel 4700: return $date;
1.51 bowersj2 4701: }
1.334 albertel 4702: sub handgrade {
4703: (my $self, my $part) = @_;
1.399 albertel 4704: my @response_ids = $self->responseIds($part);
4705: if (@response_ids) {
4706: foreach my $response_id (@response_ids) {
1.410 raeburn 4707: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
4708: if (lc($handgrade) eq 'yes') {
1.399 albertel 4709: return 'yes';
4710: }
4711: }
4712: }
1.410 raeburn 4713: my $handgrade = $self->parmval("handgrade", $part);
4714: return $handgrade;
1.334 albertel 4715: }
1.51 bowersj2 4716: sub maxtries {
4717: (my $self, my $part) = @_;
1.410 raeburn 4718: my $maxtries = $self->parmval("maxtries", $part);
4719: return $maxtries;
1.51 bowersj2 4720: }
4721: sub opendate {
4722: (my $self, my $part) = @_;
1.410 raeburn 4723: my $opendatetype = $self->parmval("opendate.type", $part);
4724: my $opendate = $self->parmval("opendate", $part);
4725: if ($opendatetype eq 'date_interval') {
4726: my $duedate = $self->duedate($part);
4727: $opendate = $duedate - $opendate;
1.51 bowersj2 4728: }
1.410 raeburn 4729: return $opendate;
1.51 bowersj2 4730: }
1.185 bowersj2 4731: sub problemstatus {
4732: (my $self, my $part) = @_;
1.410 raeburn 4733: my $problemstatus = $self->parmval("problemstatus", $part);
4734: return lc($problemstatus);
1.185 bowersj2 4735: }
1.51 bowersj2 4736: sub sig {
4737: (my $self, my $part) = @_;
1.410 raeburn 4738: my $sig = $self->parmval("sig", $part);
4739: return $sig;
1.51 bowersj2 4740: }
4741: sub tol {
4742: (my $self, my $part) = @_;
1.410 raeburn 4743: my $tol = $self->parmval("tol", $part);
4744: return $tol;
1.51 bowersj2 4745: }
1.410 raeburn 4746: sub tries {
1.108 bowersj2 4747: my $self = shift;
4748: my $tries = $self->queryRestoreHash('tries', shift);
4749: if (!defined($tries)) { return '0';}
1.51 bowersj2 4750: return $tries;
4751: }
1.70 bowersj2 4752: sub type {
4753: (my $self, my $part) = @_;
1.410 raeburn 4754: my $type = $self->parmval("type", $part);
4755: return $type;
1.70 bowersj2 4756: }
1.109 bowersj2 4757: sub weight {
4758: my $self = shift; my $part = shift;
1.211 bowersj2 4759: if (!defined($part)) { $part = '0'; }
1.409 raeburn 4760: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.508 damieng 4761: $self->{SYMB}, $self->{DOMAIN},
1.453 www 4762: $self->{USERNAME},
1.409 raeburn 4763: $env{'request.course.sec'});
4764: return $weight;
1.274 matthew 4765: }
4766: sub part_display {
4767: my $self= shift(); my $partID = shift();
4768: if (! defined($partID)) { $partID = '0'; }
4769: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
1.514 raeburn 4770: $self->{SYMB});
1.274 matthew 4771: if (! defined($display) || $display eq '') {
4772: $display = $partID;
4773: }
4774: return $display;
1.70 bowersj2 4775: }
1.432 raeburn 4776: sub slot_control {
4777: my $self=shift(); my $part = shift();
4778: if (!defined($part)) { $part = '0'; }
4779: my $useslots = $self->parmval("useslots", $part);
4780: my $availablestudent = $self->parmval("availablestudent", $part);
4781: my $available = $self->parmval("available", $part);
4782: return ($useslots,$availablestudent,$available);
4783: }
1.51 bowersj2 4784:
4785: # Multiple things need this
4786: sub getReturnHash {
4787: my $self = shift;
4788:
4789: if (!defined($self->{RETURN_HASH})) {
1.524 ! damieng 4790: #my %tmpHash = &Apache::lonnet::restore($self->{SYMB},undef,$self->{DOMAIN},$self->{USERNAME});
! 4791: #$self->{RETURN_HASH} = \%tmpHash;
! 4792: # When info is retrieved for several resources (as when rendering a directory),
! 4793: # it is much faster to use the user profile dump and avoid repeated lonnet requests
! 4794: # (especially since lonnet::currentdump is using Lond directly whenever possible,
! 4795: # and lonnet::restore is not at this point).
! 4796: $self->{NAV_MAP}->get_user_data();
! 4797: $self->{RETURN_HASH} = $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}};
1.51 bowersj2 4798: }
4799: }
4800:
4801: ######
4802: # Status queries
4803: ######
4804:
4805: # These methods query the status of problems.
4806:
4807: # If we need to count parts, this function determines the number of
4808: # parts from the metadata. When called, it returns a reference to a list
4809: # of strings corresponding to the parts. (Thus, using it in a scalar context
4810: # tells you how many parts you have in the problem:
4811: # $partcount = scalar($resource->countParts());
4812: # Don't use $self->{PARTS} directly because you don't know if it's been
4813: # computed yet.
4814:
4815: =pod
4816:
4817: =head2 Resource misc
4818:
4819: Misc. functions for the resource.
4820:
4821: =over 4
4822:
1.174 albertel 4823: =item * B<hasDiscussion>:
1.59 bowersj2 4824:
1.174 albertel 4825: Returns a false value if there has been discussion since the user last
4826: logged in, true if there has. Always returns false if the discussion
4827: data was not extracted when the nav map was constructed.
4828:
1.366 albertel 4829: =item * B<last_post_time>:
4830:
4831: Returns a false value if there hasn't been discussion otherwise returns
4832: unix timestamp of last time a discussion posting (or edit) was made.
4833:
1.393 raeburn 4834: =item * B<discussion_info>:
1.366 albertel 4835:
1.393 raeburn 4836: optional argument is a filter (currently can be 'unread');
4837: returns in scalar context the count of the number of discussion postings.
1.366 albertel 4838:
4839: returns in list context both the count of postings and a hash ref
1.393 raeburn 4840: containing information about the postings (subject, id, timestamp) in a hash.
4841:
4842: Default is to return counts for all postings. However if called with a second argument set to 'unread', will return information about only unread postings.
1.366 albertel 4843:
1.174 albertel 4844: =item * B<getFeedback>:
4845:
4846: Gets the feedback for the resource and returns the raw feedback string
4847: for the resource, or the null string if there is no feedback or the
4848: email data was not extracted when the nav map was constructed. Usually
4849: used like this:
1.59 bowersj2 4850:
1.394 raeburn 4851: for my $url (split(/\,/, $res->getFeedback())) {
4852: my $link = &escape($url);
1.59 bowersj2 4853: ...
4854:
4855: and use the link as appropriate.
4856:
4857: =cut
4858:
4859: sub hasDiscussion {
4860: my $self = shift;
1.508 damieng 4861: return $self->{NAV_MAP}->hasDiscussion($self->{SYMB});
1.59 bowersj2 4862: }
4863:
1.366 albertel 4864: sub last_post_time {
4865: my $self = shift;
1.508 damieng 4866: return $self->{NAV_MAP}->last_post_time($self->{SYMB});
1.366 albertel 4867: }
4868:
1.393 raeburn 4869: sub discussion_info {
4870: my ($self,$filter) = @_;
1.508 damieng 4871: return $self->{NAV_MAP}->discussion_info($self->{SYMB},$filter);
1.366 albertel 4872: }
4873:
1.59 bowersj2 4874: sub getFeedback {
4875: my $self = shift;
1.124 bowersj2 4876: my $source = $self->src();
1.508 damieng 4877: my $symb = $self->{SYMB};
1.125 bowersj2 4878: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4879: return $self->{NAV_MAP}->getFeedback($symb,$source);
1.124 bowersj2 4880: }
4881:
4882: sub getErrors {
4883: my $self = shift;
4884: my $source = $self->src();
1.508 damieng 4885: my $symb = $self->{SYMB};
1.124 bowersj2 4886: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4887: return $self->{NAV_MAP}->getErrors($symb,$source);
1.59 bowersj2 4888: }
4889:
4890: =pod
4891:
1.174 albertel 4892: =item * B<parts>():
1.51 bowersj2 4893:
1.174 albertel 4894: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 4895: each part of the problem. Single part problems have only a part '0'.
4896: Multipart problems do not return their part '0', since they typically
4897: do not really matter.
1.174 albertel 4898:
4899: =item * B<countParts>():
4900:
4901: Returns the number of parts of the problem a student can answer. Thus,
4902: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 4903: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 4904:
1.290 matthew 4905: =item * B<countResponses>():
4906:
4907: Returns the total number of responses in the problem a student can answer.
4908:
4909: =item * B<responseTypes>():
4910:
4911: Returns a hash whose keys are the response types. The values are the number
4912: of times each response type is used. This is for the I<entire> problem, not
4913: just a single part.
4914:
1.192 bowersj2 4915: =item * B<multipart>():
4916:
1.193 bowersj2 4917: Returns true if the problem is multipart, false otherwise. Use this instead
4918: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 4919:
1.187 bowersj2 4920: =item * B<responseType>($part):
4921:
4922: Returns the response type of the part, without the word "response" on the
4923: end. Example return values: 'string', 'essay', 'numeric', etc.
4924:
1.193 bowersj2 4925: =item * B<responseIds>($part):
1.187 bowersj2 4926:
1.193 bowersj2 4927: Retreives the response IDs for the given part as an array reference containing
4928: strings naming the response IDs. This may be empty.
1.187 bowersj2 4929:
1.51 bowersj2 4930: =back
4931:
4932: =cut
4933:
4934: sub parts {
4935: my $self = shift;
4936:
1.192 bowersj2 4937: if ($self->ext) { return []; }
1.67 bowersj2 4938:
1.51 bowersj2 4939: $self->extractParts();
4940: return $self->{PARTS};
4941: }
4942:
4943: sub countParts {
4944: my $self = shift;
4945:
4946: my $parts = $self->parts();
1.191 bowersj2 4947:
4948: # If I left this here, then it's not necessary.
4949: #my $delta = 0;
4950: #for my $part (@$parts) {
4951: # if ($part eq '0') { $delta--; }
4952: #}
1.66 bowersj2 4953:
4954: if ($self->{RESOURCE_ERROR}) {
4955: return 0;
4956: }
4957:
1.191 bowersj2 4958: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 4959: }
4960:
1.290 matthew 4961: sub countResponses {
4962: my $self = shift;
4963: my $count;
1.293 matthew 4964: foreach my $part (@{$self->parts()}) {
4965: $count+= scalar($self->responseIds($part));
1.290 matthew 4966: }
4967: return $count;
4968: }
4969:
4970: sub responseTypes {
4971: my $self = shift;
1.291 albertel 4972: my %responses;
1.368 raeburn 4973: foreach my $part (@{$self->parts()}) {
1.290 matthew 4974: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 4975: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 4976: }
4977: }
1.291 albertel 4978: return %responses;
1.290 matthew 4979: }
4980:
1.192 bowersj2 4981: sub multipart {
4982: my $self = shift;
4983: return $self->countParts() > 1;
1.51 bowersj2 4984: }
4985:
1.225 bowersj2 4986: sub singlepart {
4987: my $self = shift;
4988: return $self->countParts() == 1;
4989: }
4990:
1.187 bowersj2 4991: sub responseType {
1.184 bowersj2 4992: my $self = shift;
4993: my $part = shift;
4994:
4995: $self->extractParts();
1.235 albertel 4996: if (defined($self->{RESPONSE_TYPES}->{$part})) {
4997: return @{$self->{RESPONSE_TYPES}->{$part}};
4998: } else {
4999: return undef;
5000: }
1.187 bowersj2 5001: }
5002:
1.193 bowersj2 5003: sub responseIds {
1.187 bowersj2 5004: my $self = shift;
5005: my $part = shift;
5006:
5007: $self->extractParts();
1.235 albertel 5008: if (defined($self->{RESPONSE_IDS}->{$part})) {
5009: return @{$self->{RESPONSE_IDS}->{$part}};
5010: } else {
5011: return undef;
5012: }
1.184 bowersj2 5013: }
5014:
5015: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 5016: # part types, and saves it.
1.51 bowersj2 5017: sub extractParts {
5018: my $self = shift;
5019:
1.153 bowersj2 5020: return if (defined($self->{PARTS}));
1.67 bowersj2 5021: return if ($self->ext);
1.51 bowersj2 5022:
5023: $self->{PARTS} = [];
5024:
1.181 bowersj2 5025: my %parts;
5026:
1.82 bowersj2 5027: # Retrieve part count, if this is a problem
5028: if ($self->is_problem()) {
1.240 albertel 5029: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 5030: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 5031:
1.239 bowersj2 5032: if ($partorder) {
5033: my @parts;
5034: for my $part (split (/,/,$partorder)) {
1.508 damieng 5035: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
1.239 bowersj2 5036: push @parts, $part;
1.241 albertel 5037: $parts{$part} = 1;
1.239 bowersj2 5038: }
5039: }
5040: $self->{PARTS} = \@parts;
5041: } else {
5042: if (!$metadata) {
5043: $self->{RESOURCE_ERROR} = 1;
5044: $self->{PARTS} = [];
5045: $self->{PART_TYPE} = {};
5046: return;
5047: }
1.394 raeburn 5048: foreach my $entry (split(/\,/,$metadata)) {
5049: if ($entry =~ /^(?:part|Task)_(.*)$/) {
1.239 bowersj2 5050: my $part = $1;
5051: # This floods the logs if it blows up
5052: if (defined($parts{$part})) {
1.508 damieng 5053: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->{SYMB});
1.241 albertel 5054: }
1.239 bowersj2 5055:
5056: # check to see if part is turned off.
5057:
1.508 damieng 5058: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
1.239 bowersj2 5059: $parts{$part} = 1;
5060: }
5061: }
5062: }
1.504 raeburn 5063: my @sortedParts = sort(keys(%parts));
1.239 bowersj2 5064: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 5065: }
1.82 bowersj2 5066:
1.187 bowersj2 5067:
1.284 matthew 5068: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 5069: my %responseIdHash;
5070: my %responseTypeHash;
5071:
1.189 bowersj2 5072:
5073: # Init the responseIdHash
1.394 raeburn 5074: foreach my $part (@{$self->{PARTS}}) {
5075: $responseIdHash{$part} = [];
1.189 bowersj2 5076: }
5077:
1.187 bowersj2 5078: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 5079: # response id are delimited by underscores, but both the part
1.187 bowersj2 5080: # name and response id can themselves have underscores in them.
5081: # So we have to use our knowlege of part names to figure out
5082: # where the part names begin and end, and even then, it is possible
5083: # to construct ambiguous situations.
1.504 raeburn 5084: foreach my $data (split(/,/, $metadata)) {
1.379 albertel 5085: if ($data =~ /^([a-zA-Z]+)response_(.*)/
5086: || $data =~ /^(Task)_(.*)/) {
1.187 bowersj2 5087: my $responseType = $1;
5088: my $partStuff = $2;
5089: my $partIdSoFar = '';
1.504 raeburn 5090: my @partChunks = split(/_/, $partStuff);
1.187 bowersj2 5091: my $i = 0;
5092: for ($i = 0; $i < scalar(@partChunks); $i++) {
5093: if ($partIdSoFar) { $partIdSoFar .= '_'; }
5094: $partIdSoFar .= $partChunks[$i];
5095: if ($parts{$partIdSoFar}) {
5096: my @otherChunks = @partChunks[$i+1..$#partChunks];
5097: my $responseId = join('_', @otherChunks);
1.379 albertel 5098: if ($self->is_task()) {
5099: push(@{$responseIdHash{$partIdSoFar}},
5100: $partIdSoFar);
5101: } else {
5102: push(@{$responseIdHash{$partIdSoFar}},
5103: $responseId);
5104: }
5105: push(@{$responseTypeHash{$partIdSoFar}},
5106: $responseType);
1.187 bowersj2 5107: }
5108: }
5109: }
5110: }
1.264 albertel 5111: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 5112: #
5113: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 5114: if ($resorder) {
5115: my @resorder=split(/,/,$resorder);
5116: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 5117: my $i=0;
5118: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 5119: my @neworder;
5120: foreach my $possibleid (@resorder) {
5121: if (exists($resids{$possibleid})) {
1.286 albertel 5122: push(@neworder,$resids{$possibleid});
1.264 albertel 5123: }
5124: }
1.286 albertel 5125: my @ids;
5126: my @type;
5127: foreach my $element (@neworder) {
5128: push (@ids,$responseIdHash{$part}->[$element]);
5129: push (@type,$responseTypeHash{$part}->[$element]);
5130: }
5131: $responseIdHash{$part}=\@ids;
5132: $responseTypeHash{$part}=\@type;
1.264 albertel 5133: }
5134: }
1.187 bowersj2 5135: $self->{RESPONSE_IDS} = \%responseIdHash;
5136: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 5137: }
5138:
1.51 bowersj2 5139: return;
5140: }
5141:
5142: =pod
5143:
5144: =head2 Resource Status
5145:
1.174 albertel 5146: Problem resources have status information, reflecting their various
5147: dates and completion statuses.
1.51 bowersj2 5148:
1.174 albertel 5149: There are two aspects to the status: the date-related information and
5150: the completion information.
1.51 bowersj2 5151:
1.174 albertel 5152: Idiomatic usage of these two methods would probably look something
5153: like
1.51 bowersj2 5154:
1.394 raeburn 5155: foreach my $part ($resource->parts()) {
5156: my $dateStatus = $resource->getDateStatus($part);
5157: my $completionStatus = $resource->getCompletionStatus($part);
1.51 bowersj2 5158:
1.70 bowersj2 5159: or
5160:
1.394 raeburn 5161: my $status = $resource->status($part);
1.70 bowersj2 5162:
1.51 bowersj2 5163: ... use it here ...
5164: }
5165:
1.174 albertel 5166: Which you use depends on exactly what you are looking for. The
5167: status() function has been optimized for the nav maps display and may
5168: not precisely match what you need elsewhere.
1.101 bowersj2 5169:
1.174 albertel 5170: The symbolic constants shown below can be accessed through the
5171: resource object: C<$res->OPEN>.
1.101 bowersj2 5172:
1.51 bowersj2 5173: =over 4
5174:
1.174 albertel 5175: =item * B<getDateStatus>($part):
5176:
5177: ($part defaults to 0). A convenience function that returns a symbolic
5178: constant telling you about the date status of the part. The possible
5179: return values are:
1.51 bowersj2 5180:
5181: =back
5182:
5183: B<Date Codes>
5184:
5185: =over 4
5186:
1.174 albertel 5187: =item * B<OPEN_LATER>:
5188:
5189: The problem will be opened later.
5190:
5191: =item * B<OPEN>:
5192:
5193: Open and not yet due.
5194:
1.51 bowersj2 5195:
1.174 albertel 5196: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 5197:
1.174 albertel 5198: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 5199:
1.174 albertel 5200: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 5201:
1.174 albertel 5202: The due date has passed and there is no answer opening date set.
1.51 bowersj2 5203:
1.174 albertel 5204: =item * B<ANSWER_OPEN>:
1.51 bowersj2 5205:
1.174 albertel 5206: The answer date is here.
5207:
5208: =item * B<NETWORK_FAILURE>:
5209:
5210: The information is unknown due to network failure.
1.51 bowersj2 5211:
5212: =back
5213:
5214: =cut
5215:
5216: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 5217: sub OPEN_LATER { return 0; }
5218: sub OPEN { return 1; }
5219: sub PAST_DUE_NO_ANSWER { return 2; }
5220: sub PAST_DUE_ANSWER_LATER { return 3; }
5221: sub ANSWER_OPEN { return 4; }
1.432 raeburn 5222: sub NOTHING_SET { return 5; }
1.54 bowersj2 5223: sub NETWORK_FAILURE { return 100; }
5224:
5225: # getDateStatus gets the date status for a given problem part.
5226: # Because answer date, due date, and open date are fully independent
5227: # (i.e., it is perfectly possible to *only* have an answer date),
5228: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
5229: # (past, future, none given). This function handles this with a decision
5230: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 5231:
5232: sub getDateStatus {
5233: my $self = shift;
5234: my $part = shift;
5235: $part = "0" if (!defined($part));
1.54 bowersj2 5236:
5237: # Always return network failure if there was one.
1.51 bowersj2 5238: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5239:
5240: my $now = time();
5241:
1.53 bowersj2 5242: my $open = $self->opendate($part);
5243: my $due = $self->duedate($part);
5244: my $answer = $self->answerdate($part);
5245:
5246: if (!$open && !$due && !$answer) {
5247: # no data on the problem at all
5248: # should this be the same as "open later"? think multipart.
5249: return $self->NOTHING_SET;
5250: }
1.59 bowersj2 5251: if (!$open || $now < $open) {return $self->OPEN_LATER}
5252: if (!$due || $now < $due) {return $self->OPEN}
5253: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
5254: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 5255: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 5256: }
5257:
5258: =pod
5259:
5260: B<>
5261:
5262: =over 4
5263:
1.174 albertel 5264: =item * B<getCompletionStatus>($part):
1.51 bowersj2 5265:
1.174 albertel 5266: ($part defaults to 0.) A convenience function that returns a symbolic
5267: constant telling you about the completion status of the part, with the
5268: following possible results:
5269:
5270: =back
1.51 bowersj2 5271:
5272: B<Completion Codes>
5273:
5274: =over 4
5275:
1.174 albertel 5276: =item * B<NOT_ATTEMPTED>:
5277:
5278: Has not been attempted at all.
5279:
5280: =item * B<INCORRECT>:
5281:
5282: Attempted, but wrong by student.
1.51 bowersj2 5283:
1.174 albertel 5284: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 5285:
1.174 albertel 5286: Attempted, but wrong by instructor override.
1.51 bowersj2 5287:
1.174 albertel 5288: =item * B<CORRECT>:
1.51 bowersj2 5289:
1.174 albertel 5290: Correct or correct by instructor.
1.51 bowersj2 5291:
1.174 albertel 5292: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 5293:
1.174 albertel 5294: Correct by instructor override.
1.51 bowersj2 5295:
1.174 albertel 5296: =item * B<EXCUSED>:
5297:
5298: Excused. Not yet implemented.
5299:
5300: =item * B<NETWORK_FAILURE>:
5301:
5302: Information not available due to network failure.
5303:
5304: =item * B<ATTEMPTED>:
5305:
5306: Attempted, and not yet graded.
1.69 bowersj2 5307:
1.450 raeburn 5308: =item * B<CREDIT_ATTEMPTED>:
5309:
5310: Attempted, and credit received for attempt (survey and anonymous survey only).
5311:
1.51 bowersj2 5312: =back
5313:
5314: =cut
5315:
1.53 bowersj2 5316: sub NOT_ATTEMPTED { return 10; }
5317: sub INCORRECT { return 11; }
5318: sub INCORRECT_BY_OVERRIDE { return 12; }
5319: sub CORRECT { return 13; }
5320: sub CORRECT_BY_OVERRIDE { return 14; }
5321: sub EXCUSED { return 15; }
1.69 bowersj2 5322: sub ATTEMPTED { return 16; }
1.450 raeburn 5323: sub CREDIT_ATTEMPTED { return 17; }
1.51 bowersj2 5324:
5325: sub getCompletionStatus {
5326: my $self = shift;
1.332 albertel 5327: my $part = shift;
1.51 bowersj2 5328: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5329:
1.332 albertel 5330: my $status = $self->queryRestoreHash('solved', $part);
1.51 bowersj2 5331:
1.251 www 5332: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 5333: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 5334: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.332 albertel 5335: if ($status eq 'correct_by_override') {
5336: return $self->CORRECT_BY_OVERRIDE;
5337: }
1.51 bowersj2 5338: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
5339: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
5340: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 5341: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.450 raeburn 5342: if ($status eq 'credit_attempted') {
5343: if ($self->is_anonsurvey($part) || $self->is_survey($part)) {
5344: return $self->CREDIT_ATTEMPTED;
5345: } else {
5346: return $self->ATTEMPTED;
5347: }
5348: }
1.51 bowersj2 5349: return $self->NOT_ATTEMPTED;
1.108 bowersj2 5350: }
5351:
5352: sub queryRestoreHash {
5353: my $self = shift;
5354: my $hashentry = shift;
5355: my $part = shift;
1.185 bowersj2 5356: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 5357: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5358:
5359: $self->getReturnHash();
5360:
5361: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 5362: }
5363:
5364: =pod
5365:
5366: B<Composite Status>
5367:
1.174 albertel 5368: Along with directly returning the date or completion status, the
5369: resource object includes a convenience function B<status>() that will
5370: combine the two status tidbits into one composite status that can
1.191 bowersj2 5371: represent the status of the resource as a whole. This method represents
5372: the concept of the thing we want to display to the user on the nav maps
5373: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 5374: documented in the comments of the status method. The following results
5375: may be returned, all available as methods on the resource object
1.185 bowersj2 5376: ($res->NETWORK_FAILURE): In addition to the return values that match
5377: the date or completion status, this function can return "ANSWER_SUBMITTED"
5378: if that problemstatus parameter value is set to No, suppressing the
5379: incorrect/correct feedback.
1.51 bowersj2 5380:
5381: =over 4
5382:
1.174 albertel 5383: =item * B<NETWORK_FAILURE>:
5384:
5385: The network has failed and the information is not available.
1.51 bowersj2 5386:
1.174 albertel 5387: =item * B<NOTHING_SET>:
1.53 bowersj2 5388:
1.174 albertel 5389: No dates have been set for this problem (part) at all. (Because only
5390: certain parts of a multi-part problem may be assigned, this can not be
5391: collapsed into "open later", as we do not know a given part will EVER
5392: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 5393:
1.174 albertel 5394: =item * B<CORRECT>:
1.51 bowersj2 5395:
1.174 albertel 5396: For any reason at all, the part is considered correct.
1.54 bowersj2 5397:
1.174 albertel 5398: =item * B<EXCUSED>:
1.51 bowersj2 5399:
1.174 albertel 5400: For any reason at all, the problem is excused.
1.51 bowersj2 5401:
1.174 albertel 5402: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 5403:
1.174 albertel 5404: The problem is past due, not considered correct, and no answer date is
5405: set.
1.51 bowersj2 5406:
1.174 albertel 5407: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 5408:
1.174 albertel 5409: The problem is past due, not considered correct, and an answer date in
5410: the future is set.
1.51 bowersj2 5411:
1.174 albertel 5412: =item * B<ANSWER_OPEN>:
5413:
5414: The problem is past due, not correct, and the answer is now available.
5415:
5416: =item * B<OPEN_LATER>:
5417:
5418: The problem is not yet open.
5419:
5420: =item * B<TRIES_LEFT>:
5421:
5422: The problem is open, has been tried, is not correct, but there are
5423: tries left.
5424:
5425: =item * B<INCORRECT>:
5426:
5427: The problem is open, and all tries have been used without getting the
5428: correct answer.
5429:
5430: =item * B<OPEN>:
5431:
5432: The item is open and not yet tried.
5433:
5434: =item * B<ATTEMPTED>:
5435:
5436: The problem has been attempted.
1.69 bowersj2 5437:
1.450 raeburn 5438: =item * B<CREDIT_ATTEMPTED>:
5439:
5440: The problem has been attempted, and credit given for the attempt (survey and anonymous survey only).
5441:
1.185 bowersj2 5442: =item * B<ANSWER_SUBMITTED>:
5443:
5444: An answer has been submitted, but the student should not see it.
5445:
1.51 bowersj2 5446: =back
5447:
5448: =cut
5449:
1.432 raeburn 5450: sub TRIES_LEFT { return 20; }
5451: sub ANSWER_SUBMITTED { return 21; }
5452: sub PARTIALLY_CORRECT { return 22; }
5453:
5454: sub RESERVED_LATER { return 30; }
5455: sub RESERVED { return 31; }
5456: sub RESERVED_LOCATION { return 32; }
5457: sub RESERVABLE { return 33; }
5458: sub RESERVABLE_LATER { return 34; }
5459: sub NOTRESERVABLE { return 35; }
5460: sub NOT_IN_A_SLOT { return 36; }
5461: sub NEEDS_CHECKIN { return 37; }
5462: sub WAITING_FOR_GRADE { return 38; }
5463: sub UNKNOWN { return 39; }
1.51 bowersj2 5464:
5465: sub status {
5466: my $self = shift;
5467: my $part = shift;
5468: if (!defined($part)) { $part = "0"; }
5469: my $completionStatus = $self->getCompletionStatus($part);
5470: my $dateStatus = $self->getDateStatus($part);
5471:
5472: # What we have is a two-dimensional matrix with 4 entries on one
5473: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 5474: # plus network failure and "no date data at all".
1.51 bowersj2 5475:
1.222 bowersj2 5476: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 5477: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 5478:
1.408 raeburn 5479: my $suppressFeedback = 0;
5480: if (($self->problemstatus($part) eq 'no') ||
5481: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5482: $suppressFeedback = 1;
5483: }
1.236 bowersj2 5484: # If there's an answer date and we're past it, don't
5485: # suppress the feedback; student should know
1.330 albertel 5486: if ($self->duedate($part) && $self->duedate($part) < time() &&
5487: $self->answerdate($part) && $self->answerdate($part) < time()) {
1.236 bowersj2 5488: $suppressFeedback = 0;
5489: }
1.185 bowersj2 5490:
1.51 bowersj2 5491: # There are a few whole rows we can dispose of:
1.53 bowersj2 5492: if ($completionStatus == CORRECT ||
5493: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.332 albertel 5494: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
5495: my $awarded=$self->awarded($part);
5496: if ($awarded < 1 && $awarded > 0) {
5497: return PARTIALLY_CORRECT;
5498: } elsif ($awarded<1) {
5499: return INCORRECT;
5500: }
5501: return CORRECT;
1.69 bowersj2 5502: }
5503:
1.343 albertel 5504: # If it's WRONG... and not open
5505: if ( ($completionStatus == INCORRECT ||
5506: $completionStatus == INCORRECT_BY_OVERRIDE)
5507: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
5508: return INCORRECT;
5509: }
5510:
1.69 bowersj2 5511: if ($completionStatus == ATTEMPTED) {
5512: return ATTEMPTED;
1.53 bowersj2 5513: }
5514:
1.450 raeburn 5515: if ($completionStatus == CREDIT_ATTEMPTED) {
5516: return CREDIT_ATTEMPTED;
5517: }
5518:
1.53 bowersj2 5519: # If it's EXCUSED, then return that no matter what
5520: if ($completionStatus == EXCUSED) {
5521: return EXCUSED;
1.51 bowersj2 5522: }
5523:
1.53 bowersj2 5524: if ($dateStatus == NOTHING_SET) {
5525: return NOTHING_SET;
1.51 bowersj2 5526: }
5527:
1.69 bowersj2 5528: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
5529: # by 4 matrix (date statuses).
1.51 bowersj2 5530:
1.54 bowersj2 5531: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 5532: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 5533: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 5534: }
5535:
1.53 bowersj2 5536: if ($dateStatus == ANSWER_OPEN) {
5537: return ANSWER_OPEN;
1.51 bowersj2 5538: }
5539:
5540: # Now: (incorrect, incorrect_override, not_attempted) x
5541: # (open_later), (open)
5542:
1.53 bowersj2 5543: if ($dateStatus == OPEN_LATER) {
5544: return OPEN_LATER;
1.51 bowersj2 5545: }
5546:
5547: # If it's WRONG...
1.53 bowersj2 5548: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 5549: # and there are TRIES LEFT:
1.79 bowersj2 5550: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 5551: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 5552: }
1.185 bowersj2 5553: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 5554: }
5555:
5556: # Otherwise, it's untried and open
1.473 raeburn 5557: return OPEN;
1.224 bowersj2 5558: }
5559:
1.432 raeburn 5560: sub check_for_slot {
5561: my $self = shift;
5562: my $part = shift;
1.508 damieng 5563: my $symb = $self->{SYMB};
1.432 raeburn 5564: my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
5565: if (($use_slots ne '') && ($use_slots !~ /^\s*no\s*$/i)) {
5566: my @slots = (split(/:/,$availablestudent),split(/:/,$available));
5567: my $cid=$env{'request.course.id'};
5568: my $cdom=$env{'course.'.$cid.'.domain'};
5569: my $cnum=$env{'course.'.$cid.'.num'};
5570: my $now = time;
1.473 raeburn 5571: my $num_usable_slots = 0;
1.522 raeburn 5572: my ($checkedin,$checkedinslot,%consumed_uniq,%slots);
1.432 raeburn 5573: if (@slots > 0) {
1.522 raeburn 5574: %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
1.432 raeburn 5575: if (&Apache::lonnet::error(%slots)) {
5576: return (UNKNOWN);
5577: }
1.473 raeburn 5578: my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
1.432 raeburn 5579: foreach my $slot_name (@sorted_slots) {
1.473 raeburn 5580: next if (!defined($slots{$slot_name}) || !ref($slots{$slot_name}));
1.432 raeburn 5581: my $end = $slots{$slot_name}->{'endtime'};
5582: my $start = $slots{$slot_name}->{'starttime'};
5583: my $ip = $slots{$slot_name}->{'ip'};
5584: if ($self->simpleStatus() == OPEN) {
5585: if ($end > $now) {
1.473 raeburn 5586: if ($start > $now) {
5587: return (RESERVED_LATER,$start,$slot_name);
5588: } else {
5589: if ($ip ne '') {
5590: if (!&Apache::loncommon::check_ip_acc($ip)) {
1.503 raeburn 5591: return (RESERVED_LOCATION,$end,$slot_name);
1.432 raeburn 5592: }
5593: }
1.473 raeburn 5594: my @proctors;
5595: if ($slots{$slot_name}->{'proctor'} ne '') {
5596: @proctors = split(',',$slots{$slot_name}->{'proctor'});
5597: }
5598: if (@proctors > 0) {
5599: ($checkedin,$checkedinslot) = $self->checkedin();
5600: unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
5601: ($checkedinslot eq $slot_name)) {
5602: return (NEEDS_CHECKIN,undef,$slot_name);
1.472 raeburn 5603: }
1.432 raeburn 5604: }
1.473 raeburn 5605: return (RESERVED,$end,$slot_name);
1.432 raeburn 5606: }
5607: }
1.473 raeburn 5608: } elsif ($end > $now) {
5609: $num_usable_slots ++;
1.432 raeburn 5610: }
5611: }
1.522 raeburn 5612: my ($is_correct,$wait_for_grade);
1.432 raeburn 5613: if ($self->is_task()) {
5614: my $taskstatus = $self->taskstatus();
5615: $is_correct = (($taskstatus eq 'pass') ||
5616: ($self->solved() =~ /^correct_/));
1.522 raeburn 5617: unless ($taskstatus =~ /^(?:pass|fail)$/) {
5618: $wait_for_grade = 1;
5619: }
1.432 raeburn 5620: } else {
1.522 raeburn 5621: unless ($self->completable()) {
5622: $wait_for_grade = 1;
5623: }
5624: unless (($self->problemstatus($part) eq 'no') ||
5625: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5626: $is_correct = ($self->solved($part) =~ /^correct_/);
5627: $wait_for_grade = 0;
5628: }
1.432 raeburn 5629: }
5630: ($checkedin,$checkedinslot) = $self->checkedin();
5631: if ($checkedin) {
1.522 raeburn 5632: if (ref($slots{$checkedinslot}) eq 'HASH') {
5633: $consumed_uniq{$checkedinslot} = $slots{$checkedinslot}{'uniqueperiod'};
5634: }
5635: if ($wait_for_grade) {
1.432 raeburn 5636: return (WAITING_FOR_GRADE);
5637: } elsif ($is_correct) {
5638: return (CORRECT);
5639: }
5640: }
1.473 raeburn 5641: if ($num_usable_slots) {
5642: return(NOT_IN_A_SLOT);
5643: }
5644: }
5645: my $reservable = &Apache::lonnet::get_reservable_slots($cnum,$cdom,$env{'user.name'},
5646: $env{'user.domain'});
5647: if (ref($reservable) eq 'HASH') {
1.511 raeburn 5648: my ($map) = &Apache::lonnet::decode_symb($symb);
1.473 raeburn 5649: if ((ref($reservable->{'now_order'}) eq 'ARRAY') && (ref($reservable->{'now'}) eq 'HASH')) {
1.474 raeburn 5650: foreach my $slot (reverse (@{$reservable->{'now_order'}})) {
1.510 raeburn 5651: my $canuse;
5652: if ($reservable->{'now'}{$slot}{'symb'} eq '') {
5653: $canuse = 1;
5654: } else {
5655: my %oksymbs;
5656: my @slotsymbs = split(/\s*,\s*/,$reservable->{'now'}{$slot}{'symb'});
5657: map { $oksymbs{$_} = 1; } @slotsymbs;
5658: if ($oksymbs{$symb}) {
5659: $canuse = 1;
5660: } else {
5661: foreach my $item (@slotsymbs) {
5662: if ($item =~ /\.(page|sequence)$/) {
5663: (undef,undef, my $sloturl) = &Apache::lonnet::decode_symb($item);
5664: if (($map ne '') && ($map eq $sloturl)) {
5665: $canuse = 1;
5666: last;
5667: }
5668: }
5669: }
5670: }
5671: }
5672: if ($canuse) {
1.522 raeburn 5673: if ($checkedin) {
5674: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5675: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5676: if ($reservable->{'now'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5677: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5678: next if (!
5679: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5680: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5681: }
5682: }
5683: }
1.473 raeburn 5684: return(RESERVABLE,$reservable->{'now'}{$slot}{'endreserve'});
5685: }
5686: }
1.432 raeburn 5687: }
1.473 raeburn 5688: if ((ref($reservable->{'future_order'}) eq 'ARRAY') && (ref($reservable->{'future'}) eq 'HASH')) {
1.474 raeburn 5689: foreach my $slot (@{$reservable->{'future_order'}}) {
1.510 raeburn 5690: my $canuse;
5691: if ($reservable->{'future'}{$slot}{'symb'} eq '') {
5692: $canuse = 1;
5693: } elsif ($reservable->{'future'}{$slot}{'symb'} =~ /,/) {
5694: my %oksymbs;
5695: my @slotsymbs = split(/\s*,\s*/,$reservable->{'future'}{$slot}{'symb'});
5696: map { $oksymbs{$_} = 1; } @slotsymbs;
5697: if ($oksymbs{$symb}) {
5698: $canuse = 1;
5699: } else {
5700: foreach my $item (@slotsymbs) {
5701: if ($item =~ /\.(page|sequence)$/) {
5702: (undef,undef, my $sloturl) = &Apache::lonnet::decode_symb($item);
5703: if (($map ne '') && ($map eq $sloturl)) {
5704: $canuse = 1;
5705: last;
5706: }
5707: }
5708: }
5709: }
5710: } elsif ($reservable->{'future'}{$slot}{'symb'} eq $symb) {
5711: $canuse = 1;
5712: }
5713: if ($canuse) {
1.522 raeburn 5714: if ($checkedin) {
5715: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5716: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5717: if ($reservable->{'future'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5718: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5719: next if (!
5720: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5721: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5722: }
5723: }
5724: }
1.473 raeburn 5725: return(RESERVABLE_LATER,$reservable->{'future'}{$slot}{'startreserve'});
5726: }
5727: }
1.432 raeburn 5728: }
5729: }
1.473 raeburn 5730: return(NOTRESERVABLE);
1.432 raeburn 5731: }
5732: return;
5733: }
5734:
1.224 bowersj2 5735: sub CLOSED { return 23; }
5736: sub ERROR { return 24; }
5737:
5738: =pod
5739:
5740: B<Simple Status>
5741:
5742: Convenience method B<simpleStatus> provides a "simple status" for the resource.
5743: "Simple status" corresponds to "which icon is shown on the
5744: Navmaps". There are six "simple" statuses:
5745:
5746: =over 4
5747:
5748: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
5749:
5750: =item * B<OPEN>: The problem is open and unattempted.
5751:
5752: =item * B<CORRECT>: The problem is correct for any reason.
5753:
5754: =item * B<INCORRECT>: The problem is incorrect and can still be
5755: completed successfully.
5756:
5757: =item * B<ATTEMPTED>: The problem has been attempted, but the student
5758: does not know if they are correct. (The ellipsis icon.)
5759:
5760: =item * B<ERROR>: There is an error retrieving information about this
5761: problem.
5762:
5763: =back
5764:
5765: =cut
5766:
5767: # This hash maps the composite status to this simple status, and
5768: # can be used directly, if you like
5769: my %compositeToSimple =
5770: (
5771: NETWORK_FAILURE() => ERROR,
5772: NOTHING_SET() => CLOSED,
5773: CORRECT() => CORRECT,
1.332 albertel 5774: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
1.224 bowersj2 5775: EXCUSED() => CORRECT,
5776: PAST_DUE_NO_ANSWER() => INCORRECT,
5777: PAST_DUE_ANSWER_LATER() => INCORRECT,
5778: ANSWER_OPEN() => INCORRECT,
5779: OPEN_LATER() => CLOSED,
5780: TRIES_LEFT() => OPEN,
5781: INCORRECT() => INCORRECT,
5782: OPEN() => OPEN,
5783: ATTEMPTED() => ATTEMPTED,
1.450 raeburn 5784: CREDIT_ATTEMPTED() => CORRECT,
1.224 bowersj2 5785: ANSWER_SUBMITTED() => ATTEMPTED
5786: );
5787:
5788: sub simpleStatus {
5789: my $self = shift;
5790: my $part = shift;
5791: my $status = $self->status($part);
5792: return $compositeToSimple{$status};
1.225 bowersj2 5793: }
5794:
5795: =pod
5796:
5797: B<simpleStatusCount> will return an array reference containing, in
5798: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
5799: and ERROR parts the given problem has.
5800:
5801: =cut
5802:
5803: # This maps the status to the slot we want to increment
5804: my %statusToSlotMap =
5805: (
5806: OPEN() => 0,
5807: CLOSED() => 1,
5808: CORRECT() => 2,
5809: INCORRECT() => 3,
5810: ATTEMPTED() => 4,
5811: ERROR() => 5
5812: );
5813:
5814: sub statusToSlot { return $statusToSlotMap{shift()}; }
5815:
5816: sub simpleStatusCount {
5817: my $self = shift;
5818:
5819: my @counts = (0, 0, 0, 0, 0, 0, 0);
5820: foreach my $part (@{$self->parts()}) {
5821: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
5822: }
5823:
5824: return \@counts;
1.191 bowersj2 5825: }
5826:
5827: =pod
5828:
5829: B<Completable>
5830:
5831: The completable method represents the concept of I<whether the student can
5832: currently do the problem>. If the student can do the problem, which means
5833: that it is open, there are tries left, and if the problem is manually graded
5834: or the grade is suppressed via problemstatus, the student has not tried it
5835: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
5836: either the student has tried it and there is no feedback, or that for
5837: some reason it is no longer completable (not open yet, successfully completed,
5838: out of tries, etc.). As an example, this is used as the filter for the
5839: "Uncompleted Homework" option for the nav maps.
5840:
5841: If this does not quite meet your needs, do not fiddle with it (unless you are
5842: fixing it to better match the student's conception of "completable" because
5843: it's broken somehow)... make a new method.
5844:
5845: =cut
5846:
5847: sub completable {
5848: my $self = shift;
5849: if (!$self->is_problem()) { return 0; }
5850: my $partCount = $self->countParts();
5851:
5852: foreach my $part (@{$self->parts()}) {
5853: if ($part eq '0' && $partCount != 1) { next; }
5854: my $status = $self->status($part);
5855: # "If any of the parts are open, or have tries left (implies open),
5856: # and it is not "attempted" (manually graded problem), it is
5857: # not "complete"
1.216 bowersj2 5858: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
1.450 raeburn 5859: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
1.216 bowersj2 5860: $status == ANSWER_SUBMITTED() ) {
5861: # did this part already, as well as we can
5862: next;
5863: }
5864: if ($status == OPEN() || $status == TRIES_LEFT()) {
5865: return 1;
5866: }
1.191 bowersj2 5867: }
5868:
5869: # If all the parts were complete, so was this problem.
1.216 bowersj2 5870: return 0;
1.51 bowersj2 5871: }
5872:
5873: =pod
5874:
1.507 raeburn 5875: B<Answerable>
5876:
5877: The answerable method differs from the completable method in its handling of problem parts
5878: for which feedback on correctness is suppressed, but the student still has tries left, and
5879: the problem part is not past due, (i.e., the student could submit a different answer if
5880: he/she so chose). For that case completable will return 0, whereas answerable will return 1.
5881:
5882: =cut
5883:
5884: sub answerable {
5885: my $self = shift;
5886: if (!$self->is_problem()) { return 0; }
5887: my $partCount = $self->countParts();
5888: foreach my $part (@{$self->parts()}) {
5889: if ($part eq '0' && $partCount != 1) { next; }
5890: my $status = $self->status($part);
5891: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
5892: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
5893: $status == ANSWER_SUBMITTED() ) {
5894: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
5895: return 1;
5896: }
5897: }
5898: if ($status == OPEN() || $status == TRIES_LEFT() || $status == NETWORK_FAILURE()) {
5899: return 1;
5900: }
5901: }
5902: # None of the parts were answerable, so neither is this problem.
5903: return 0;
5904: }
5905:
5906: =pod
5907:
1.51 bowersj2 5908: =head2 Resource/Nav Map Navigation
5909:
5910: =over 4
5911:
1.174 albertel 5912: =item * B<getNext>():
5913:
5914: Retreive an array of the possible next resources after this
5915: one. Always returns an array, even in the one- or zero-element case.
5916:
5917: =item * B<getPrevious>():
1.85 bowersj2 5918:
1.174 albertel 5919: Retreive an array of the possible previous resources from this
5920: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 5921:
5922: =cut
5923:
5924: sub getNext {
5925: my $self = shift;
5926: my @branches;
5927: my $to = $self->to();
1.85 bowersj2 5928: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 5929: my $choice = $self->{NAV_MAP}->getById($branch);
1.342 albertel 5930: #if (!$choice->condition()) { next; }
1.51 bowersj2 5931: my $next = $choice->goesto();
5932: $next = $self->{NAV_MAP}->getById($next);
5933:
1.131 bowersj2 5934: push @branches, $next;
1.85 bowersj2 5935: }
5936: return \@branches;
5937: }
5938:
5939: sub getPrevious {
5940: my $self = shift;
5941: my @branches;
5942: my $from = $self->from();
1.504 raeburn 5943: foreach my $branch ( split(/,/, $from)) {
1.85 bowersj2 5944: my $choice = $self->{NAV_MAP}->getById($branch);
5945: my $prev = $choice->comesfrom();
5946: $prev = $self->{NAV_MAP}->getById($prev);
5947:
1.131 bowersj2 5948: push @branches, $prev;
1.51 bowersj2 5949: }
5950: return \@branches;
1.131 bowersj2 5951: }
5952:
5953: sub browsePriv {
5954: my $self = shift;
1.505 raeburn 5955: my $noblockcheck = shift;
1.131 bowersj2 5956: if (defined($self->{BROWSE_PRIV})) {
5957: return $self->{BROWSE_PRIV};
5958: }
5959:
1.311 albertel 5960: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
1.508 damieng 5961: $self->{SYMB},undef,
1.505 raeburn 5962: undef,$noblockcheck);
1.51 bowersj2 5963: }
5964:
5965: =pod
1.2 www 5966:
1.51 bowersj2 5967: =back
1.2 www 5968:
1.51 bowersj2 5969: =cut
1.2 www 5970:
1.51 bowersj2 5971: 1;
1.2 www 5972:
1.51 bowersj2 5973: __END__
1.2 www 5974:
5975:
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