Annotation of loncom/interface/lonnavmaps.pm, revision 1.446
1.2 www 1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
1.1 www 3: #
1.446 ! raeburn 4: # $Id: lonnavmaps.pm,v 1.445 2010/03/16 19:55:49 droeschl Exp $
1.437 foxr 5:
1.20 albertel 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
1.245 www 29: ###
1.2 www 30:
1.416 jms 31: =pod
32:
33: =head1 NAME
34:
1.435 raeburn 35: Apache::lonnavmaps - Subroutines to handle and render the navigation
1.416 jms 36:
37: =head1 SYNOPSIS
38:
39: Handles navigational maps.
40:
41: The main handler generates the navigational listing for the course,
42: the other objects export this information in a usable fashion for
43: other modules.
44:
45:
46: This is part of the LearningOnline Network with CAPA project
47: described at http://www.lon-capa.org.
48:
49:
50: =head1 OVERVIEW
51:
1.439 wenzelju 52: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
1.416 jms 53: course structure and caches it in what is often referred to as the
54: "big hash" X<big hash>. You can see it if you are logged into
55: LON-CAPA, in a course, by going to /adm/test. (You may need to
56: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
57: content of the hash will be under the heading "Big Hash".
58:
59: Big Hash contains, among other things, how resources are related
60: to each other (next/previous), what resources are maps, which
61: resources are being chosen to not show to the student (for random
62: selection), and a lot of other things that can take a lot of time
63: to compute due to the amount of data that needs to be collected and
64: processed.
65:
66: Apache::lonnavmaps provides an object model for manipulating this
67: information in a higher-level fashion than directly manipulating
68: the hash. It also provides access to several auxilary functions
69: that aren't necessarily stored in the Big Hash, but are a per-
70: resource sort of value, like whether there is any feedback on
71: a given resource.
72:
73: Apache::lonnavmaps also abstracts away branching, and someday,
74: conditions, for the times where you don't really care about those
75: things.
76:
77: Apache::lonnavmaps also provides fairly powerful routines for
78: rendering navmaps, and last but not least, provides the navmaps
79: view for when the user clicks the NAV button.
80:
81: B<Note>: Apache::lonnavmaps I<only> works for the "currently
82: logged in user"; if you want things like "due dates for another
83: student" lonnavmaps can not directly retrieve information like
84: that. You need the EXT function. This module can still help,
85: because many things, such as the course structure, are constant
86: between users, and Apache::lonnavmaps can help by providing
87: symbs for the EXT call.
88:
89: The rest of this file will cover the provided rendering routines,
90: which can often be used without fiddling with the navmap object at
91: all, then documents the Apache::lonnavmaps::navmap object, which
92: is the key to accessing the Big Hash information, covers the use
93: of the Iterator (which provides the logic for traversing the
94: somewhat-complicated Big Hash data structure), documents the
95: Apache::lonnavmaps::Resource objects that are returned by
96:
97: =head1 Subroutine: render
98:
99: The navmap renderer package provides a sophisticated rendering of the
100: standard navigation maps interface into HTML. The provided nav map
101: handler is actually just a glorified call to this.
102:
103: Because of the large number of parameters this function accepts,
104: instead of passing it arguments as is normal, pass it in an anonymous
105: hash with the desired options.
106:
107: The package provides a function called 'render', called as
108: Apache::lonnavmaps::render({}).
109:
110: =head2 Overview of Columns
111:
112: The renderer will build an HTML table for the navmap and return
113: it. The table consists of several columns, and a row for each
114: resource (or possibly each part). You tell the renderer how many
115: columns to create and what to place in each column, optionally using
116: one or more of the prepared columns, and the renderer will assemble
117: the table.
118:
119: Any additional generally useful column types should be placed in the
120: renderer code here, so anybody can use it anywhere else. Any code
121: specific to the current application (such as the addition of <input>
122: elements in a column) should be placed in the code of the thing using
123: the renderer.
124:
125: At the core of the renderer is the array reference COLS (see Example
126: section below for how to pass this correctly). The COLS array will
127: consist of entries of one of two types of things: Either an integer
128: representing one of the pre-packaged column types, or a sub reference
129: that takes a resource reference, a part number, and a reference to the
130: argument hash passed to the renderer, and returns a string that will
131: be inserted into the HTML representation as it.
132:
133: All other parameters are ways of either changing how the columns
134: are printing, or which rows are shown.
135:
136: The pre-packaged column names are refered to by constants in the
137: Apache::lonnavmaps namespace. The following currently exist:
138:
139: =over 4
140:
141: =item * B<Apache::lonnavmaps::resource>:
142:
143: The general info about the resource: Link, icon for the type, etc. The
144: first column in the standard nav map display. This column provides the
145: indentation effect seen in the B<NAV> screen. This column also accepts
146: the following parameters in the renderer hash:
147:
148: =over 4
149:
150: =item * B<resource_nolink>: default false
151:
152: If true, the resource will not be linked. By default, all non-folder
153: resources are linked.
154:
155: =item * B<resource_part_count>: default true
156:
157: If true, the resource will show a part count B<if> the full
158: part list is not displayed. (See "condense_parts" later.) If false,
159: the resource will never show a part count.
160:
161: =item * B<resource_no_folder_link>:
162:
163: If true, the resource's folder will not be clickable to open or close
164: it. Default is false. True implies printCloseAll is false, since you
165: can't close or open folders when this is on anyhow.
166:
167: =back
168:
169: =item * B<Apache::lonnavmaps::communication_status>:
170:
171: Whether there is discussion on the resource, email for the user, or
172: (lumped in here) perl errors in the execution of the problem. This is
173: the second column in the main nav map.
174:
175: =item * B<Apache::lonnavmaps::quick_status>:
176:
177: An icon for the status of a problem, with five possible states:
178: Correct, incorrect, open, awaiting grading (for a problem where the
179: computer's grade is suppressed, or the computer can't grade, like
180: essay problem), or none (not open yet, not a problem). The
181: third column of the standard navmap.
182:
183: =item * B<Apache::lonnavmaps::long_status>:
184:
185: A text readout of the details of the current status of the problem,
186: such as "Due in 22 hours". The fourth column of the standard navmap.
187:
188: =item * B<Apache::lonnavmaps::part_status_summary>:
189:
190: A text readout summarizing the status of the problem. If it is a
191: single part problem, will display "Correct", "Incorrect",
192: "Not yet open", "Open", "Attempted", or "Error". If there are
193: multiple parts, this will output a string that in HTML will show a
194: status of how many parts are in each status, in color coding, trying
195: to match the colors of the icons within reason.
1.1 www 196:
1.416 jms 197: Note this only makes sense if you are I<not> showing parts. If
198: C<showParts> is true (see below), this column will not output
199: anything.
1.2 www 200:
1.416 jms 201: =back
1.133 bowersj2 202:
1.416 jms 203: If you add any others please be sure to document them here.
1.133 bowersj2 204:
1.416 jms 205: An example of a column renderer that will show the ID number of a
206: resource, along with the part name if any:
1.140 bowersj2 207:
1.416 jms 208: sub {
209: my ($resource, $part, $params) = @_;
210: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
211: return '<td>' . $resource->{ID} . '</td>';
212: }
1.135 bowersj2 213:
1.416 jms 214: Note these functions are responsible for the TD tags, which allow them
215: to override vertical and horizontal alignment, etc.
1.133 bowersj2 216:
1.416 jms 217: =head2 Parameters
1.130 www 218:
1.416 jms 219: Minimally, you should be
220: able to get away with just using 'cols' (to specify the columns
221: shown), 'url' (necessary for the folders to link to the current screen
222: correctly), and possibly 'queryString' if your app calls for it. In
223: that case, maintaining the state of the folders will be done
224: automatically.
1.268 albertel 225:
1.416 jms 226: =over 4
1.268 albertel 227:
1.416 jms 228: =item * B<iterator>: default: constructs one from %env
1.51 bowersj2 229:
1.416 jms 230: A reference to a fresh ::iterator to use from the navmaps. The
231: rendering will reflect the options passed to the iterator, so you can
232: use that to just render a certain part of the course, if you like. If
233: one is not passed, the renderer will attempt to construct one from
234: env{'form.filter'} and env{'form.condition'} information, plus the
235: 'iterator_map' parameter if any.
1.51 bowersj2 236:
1.416 jms 237: =item * B<iterator_map>: default: not used
1.51 bowersj2 238:
1.416 jms 239: If you are letting the renderer do the iterator handling, you can
240: instruct the renderer to render only a particular map by passing it
241: the source of the map you want to process, like
242: '/res/103/jerf/navmap.course.sequence'.
1.51 bowersj2 243:
1.416 jms 244: =item * B<include_top_level_map>: default: false
1.51 bowersj2 245:
1.416 jms 246: If you need to include the top level map (meaning the course) in the
247: rendered output set this to true
1.51 bowersj2 248:
1.416 jms 249: =item * B<navmap>: default: constructs one from %env
1.51 bowersj2 250:
1.416 jms 251: A reference to a navmap, used only if an iterator is not passed in. If
252: this is necessary to make an iterator but it is not passed in, a new
253: one will be constructed based on env info. This is useful to do basic
254: error checking before passing it off to render.
1.51 bowersj2 255:
1.416 jms 256: =item * B<r>: default: must be passed in
1.53 bowersj2 257:
1.416 jms 258: The standard Apache response object. This must be passed to the
259: renderer or the course hash will be locked.
1.53 bowersj2 260:
1.416 jms 261: =item * B<cols>: default: empty (useless)
1.407 raeburn 262:
1.416 jms 263: An array reference
1.53 bowersj2 264:
1.416 jms 265: =item * B<showParts>:default true
1.115 bowersj2 266:
1.416 jms 267: A flag. If true, a line for the resource itself, and a line
268: for each part will be displayed. If not, only one line for each
269: resource will be displayed.
1.115 bowersj2 270:
1.416 jms 271: =item * B<condenseParts>: default true
1.115 bowersj2 272:
1.416 jms 273: A flag. If true, if all parts of the problem have the same
274: status and that status is Nothing Set, Correct, or Network Failure,
275: then only one line will be displayed for that resource anyhow. If no,
276: all parts will always be displayed. If showParts is 0, this is
277: ignored.
1.115 bowersj2 278:
1.416 jms 279: =item * B<jumpCount>: default: determined from %env
1.115 bowersj2 280:
1.416 jms 281: A string identifying the URL to place the anchor 'curloc' at.
282: It is the responsibility of the renderer user to
283: ensure that the #curloc is in the URL. By default, determined through
284: the use of the env{} 'jump' information, and should normally "just
285: work" correctly.
1.177 www 286:
1.416 jms 287: =item * B<here>: default: empty string
1.68 bowersj2 288:
1.416 jms 289: A Symb identifying where to place the 'here' marker. The empty
290: string means no marker.
1.73 bowersj2 291:
1.416 jms 292: =item * B<indentString>: default: 25 pixel whitespace image
1.347 www 293:
1.416 jms 294: A string identifying the indentation string to use.
1.347 www 295:
1.416 jms 296: =item * B<queryString>: default: empty
1.346 foxr 297:
1.416 jms 298: A string which will be prepended to the query string used when the
299: folders are opened or closed. You can use this to pass
300: application-specific values.
1.73 bowersj2 301:
1.416 jms 302: =item * B<url>: default: none
1.73 bowersj2 303:
1.416 jms 304: The url the folders will link to, which should be the current
305: page. Required if the resource info column is shown, and you
306: are allowing the user to open and close folders.
1.73 bowersj2 307:
1.416 jms 308: =item * B<currentJumpIndex>: default: no jumping
1.73 bowersj2 309:
1.416 jms 310: Describes the currently-open row number to cause the browser to jump
311: to, because the user just opened that folder. By default, pulled from
312: the Jump information in the env{'form.*'}.
1.73 bowersj2 313:
1.416 jms 314: =item * B<printKey>: default: false
1.101 bowersj2 315:
1.416 jms 316: If true, print the key that appears on the top of the standard
317: navmaps.
1.73 bowersj2 318:
1.416 jms 319: =item * B<printCloseAll>: default: true
1.73 bowersj2 320:
1.416 jms 321: If true, print the "Close all folders" or "open all folders"
322: links.
1.403 albertel 323:
1.416 jms 324: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.346 foxr 325:
1.416 jms 326: A function that takes the resource object as its only parameter and
327: returns a true or false value. If true, the resource is displayed. If
328: false, it is simply skipped in the display.
1.346 foxr 329:
1.416 jms 330: =item * B<suppressEmptySequences>: default: false
1.346 foxr 331:
1.416 jms 332: If you're using a filter function, and displaying sequences to orient
333: the user, then frequently some sequences will be empty. Setting this to
334: true will cause those sequences not to display, so as not to confuse the
335: user into thinking that if the sequence is there there should be things
336: under it; for example, see the "Show Uncompleted Homework" view on the
337: B<NAV> screen.
1.73 bowersj2 338:
1.416 jms 339: =item * B<suppressNavmaps>: default: false
1.53 bowersj2 340:
1.416 jms 341: If true, will not display Navigate Content resources.
1.51 bowersj2 342:
1.416 jms 343: =back
1.133 bowersj2 344:
1.416 jms 345: =head2 Additional Info
1.174 albertel 346:
1.416 jms 347: In addition to the parameters you can pass to the renderer, which will
348: be passed through unchange to the column renderers, the renderer will
349: generate the following information which your renderer may find
350: useful:
1.174 albertel 351:
1.416 jms 352: =over 4
1.174 albertel 353:
1.416 jms 354: =item * B<counter>:
1.133 bowersj2 355:
1.416 jms 356: Contains the number of rows printed. Useful after calling the render
357: function, as you can detect whether anything was printed at all.
1.216 bowersj2 358:
1.416 jms 359: =item * B<isNewBranch>:
1.216 bowersj2 360:
1.416 jms 361: Useful for renderers: If this resource is currently the first resource
362: of a new branch, this will be true. The Resource column (leftmost in the
363: navmaps screen) uses this to display the "new branch" icon
1.216 bowersj2 364:
1.416 jms 365: =back
1.216 bowersj2 366:
1.416 jms 367: =cut
1.216 bowersj2 368:
369:
1.416 jms 370: =head1 SUBROUTINES
1.216 bowersj2 371:
1.416 jms 372: =over
1.216 bowersj2 373:
1.416 jms 374: =item update()
1.133 bowersj2 375:
1.416 jms 376: =item addToFilter()
1.133 bowersj2 377:
1.416 jms 378: Convenience functions: Returns a string that adds or subtracts
379: the second argument from the first hash, appropriate for the
380: query string that determines which folders to recurse on
1.174 albertel 381:
1.416 jms 382: =item removeFromFilter()
1.51 bowersj2 383:
1.416 jms 384: =item getLinkForResource()
1.51 bowersj2 385:
1.416 jms 386: Convenience function: Given a stack returned from getStack on the iterator,
387: return the correct src() value.
1.174 albertel 388:
1.416 jms 389: =item getDescription()
1.174 albertel 390:
1.416 jms 391: Convenience function: This separates the logic of how to create
392: the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
393: etc.) into a separate function. It takes a resource object as the
394: first parameter, and the part number of the resource as the second.
395: It's basically a big switch statement on the status of the resource.
1.174 albertel 396:
1.416 jms 397: =item dueInLessThan24Hours()
1.216 bowersj2 398:
1.416 jms 399: Convenience function, so others can use it: Is the problem due in less than 24 hours, and still can be done?
1.51 bowersj2 400:
1.416 jms 401: =item lastTry()
1.51 bowersj2 402:
1.416 jms 403: Convenience function, so others can use it: Is there only one try remaining for the
404: part, with more than one try to begin with, not due yet and still can be done?
1.51 bowersj2 405:
1.416 jms 406: =item advancedUser()
1.51 bowersj2 407:
1.416 jms 408: This puts a human-readable name on the env variable.
1.51 bowersj2 409:
1.416 jms 410: =item timeToHumanString()
1.51 bowersj2 411:
1.416 jms 412: timeToHumanString takes a time number and converts it to a
413: human-readable representation, meant to be used in the following
414: manner:
1.174 albertel 415:
1.416 jms 416: =over 4
1.51 bowersj2 417:
1.416 jms 418: =item * print "Due $timestring"
1.133 bowersj2 419:
1.416 jms 420: =item * print "Open $timestring"
1.133 bowersj2 421:
1.416 jms 422: =item * print "Answer available $timestring"
1.144 bowersj2 423:
1.133 bowersj2 424: =back
1.51 bowersj2 425:
1.416 jms 426: Very, very, very, VERY English-only... goodness help a localizer on
427: this func...
1.174 albertel 428:
1.417 jms 429: =item resource()
1.174 albertel 430:
1.417 jms 431: returns 0
1.51 bowersj2 432:
1.417 jms 433: =item communication_status()
1.51 bowersj2 434:
1.417 jms 435: returns 1
1.174 albertel 436:
1.417 jms 437: =item quick_status()
1.51 bowersj2 438:
1.417 jms 439: returns 2
1.225 bowersj2 440:
1.417 jms 441: =item long_status()
1.225 bowersj2 442:
1.417 jms 443: returns 3
1.225 bowersj2 444:
1.417 jms 445: =item part_status_summary()
1.51 bowersj2 446:
1.417 jms 447: returns 4
1.51 bowersj2 448:
1.417 jms 449: =item render_resource()
1.51 bowersj2 450:
1.417 jms 451: =item render_communication_status()
1.51 bowersj2 452:
1.417 jms 453: =item render_quick_status()
454:
455: =item render_long_status()
456:
457: =item render_parts_summary_status()
458:
459: =item setDefault()
460:
461: =item cmp_title()
462:
463: =item render()
464:
465: =item add_linkitem()
466:
467: =item show_linkitems()
1.130 www 468:
1.416 jms 469: =back
1.115 bowersj2 470:
1.416 jms 471: =cut
1.140 bowersj2 472:
1.416 jms 473: package Apache::lonnavmaps;
1.51 bowersj2 474:
1.416 jms 475: use strict;
476: use GDBM_File;
477: use Apache::loncommon();
478: use Apache::lonenc();
479: use Apache::lonlocal;
480: use Apache::lonnet;
1.443 foxr 481:
1.416 jms 482: use POSIX qw (floor strftime);
483: use Time::HiRes qw( gettimeofday tv_interval );
484: use LONCAPA;
485: use DateTime();
1.174 albertel 486:
1.416 jms 487: # symbolic constants
488: sub SYMB { return 1; }
489: sub URL { return 2; }
490: sub NOTHING { return 3; }
1.174 albertel 491:
1.416 jms 492: # Some data
1.174 albertel 493:
1.416 jms 494: my $resObj = "Apache::lonnavmaps::resource";
1.174 albertel 495:
1.443 foxr 496: # Keep these mappings in sync with lonquickgrades, which usesthe colors
1.416 jms 497: # instead of the icons.
498: my %statusIconMap =
499: (
500: $resObj->CLOSED => '',
501: $resObj->OPEN => 'navmap.open.gif',
502: $resObj->CORRECT => 'navmap.correct.gif',
503: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
504: $resObj->INCORRECT => 'navmap.wrong.gif',
505: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
506: $resObj->ERROR => ''
507: );
1.401 albertel 508:
1.438 wenzelju 509: my %iconAltTags = #texthash does not work here
1.439 wenzelju 510: ( 'navmap.correct.gif' => 'Correct',
511: 'navmap.wrong.gif' => 'Incorrect',
512: 'navmap.open.gif' => 'Open',
513: 'navmap.partial.gif' => 'Partially Correct',
514: 'navmap.ellipsis.gif' => 'Attempted',
515: );
1.401 albertel 516:
1.416 jms 517: # Defines a status->color mapping, null string means don't color
518: my %colormap =
519: ( $resObj->NETWORK_FAILURE => '',
520: $resObj->CORRECT => '',
521: $resObj->EXCUSED => '#3333FF',
522: $resObj->PAST_DUE_ANSWER_LATER => '',
523: $resObj->PAST_DUE_NO_ANSWER => '',
524: $resObj->ANSWER_OPEN => '#006600',
525: $resObj->OPEN_LATER => '',
526: $resObj->TRIES_LEFT => '',
527: $resObj->INCORRECT => '',
528: $resObj->OPEN => '',
529: $resObj->NOTHING_SET => '',
530: $resObj->ATTEMPTED => '',
531: $resObj->ANSWER_SUBMITTED => '',
532: $resObj->PARTIALLY_CORRECT => '#006600'
533: );
534: # And a special case in the nav map; what to do when the assignment
535: # is not yet done and due in less than 24 hours
536: my $hurryUpColor = "#FF0000";
1.174 albertel 537:
1.432 raeburn 538: my $future_slots_checked = 0;
539: my $future_slots = 0;
540:
1.416 jms 541: sub addToFilter {
542: my $hashIn = shift;
543: my $addition = shift;
544: my %hash = %$hashIn;
545: $hash{$addition} = 1;
1.174 albertel 546:
1.416 jms 547: return join (",", keys(%hash));
548: }
1.174 albertel 549:
1.416 jms 550: sub removeFromFilter {
551: my $hashIn = shift;
552: my $subtraction = shift;
553: my %hash = %$hashIn;
1.174 albertel 554:
1.416 jms 555: delete $hash{$subtraction};
556: return join(",", keys(%hash));
557: }
1.174 albertel 558:
1.416 jms 559: sub getLinkForResource {
560: my $stack = shift;
561: my $res;
1.174 albertel 562:
1.416 jms 563: # Check to see if there are any pages in the stack
564: foreach $res (@$stack) {
565: if (defined($res)) {
566: my $anchor;
567: if ($res->is_page()) {
568: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
569: $anchor=&escape($anchor->shown_symb());
570: return ($res->link(),$res->shown_symb(),$anchor);
571: }
572: # in case folder was skipped over as "only sequence"
573: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
574: if ($map=~/\.page$/) {
575: my $url=&Apache::lonnet::clutter($map);
1.437 foxr 576: $anchor=&escape($res->shown_symb());
1.416 jms 577: return ($url,$res->shown_symb(),$anchor);
578: }
579: }
580: }
1.174 albertel 581:
1.416 jms 582: # Failing that, return the src of the last resource that is defined
583: # (when we first recurse on a map, it puts an undefined resource
584: # on the bottom because $self->{HERE} isn't defined yet, and we
585: # want the src for the map anyhow)
586: foreach my $item (@$stack) {
587: if (defined($item)) { $res = $item; }
588: }
1.174 albertel 589:
1.416 jms 590: if ($res) {
591: return ($res->link(),$res->shown_symb());
592: }
593: return;
594: }
1.174 albertel 595:
1.417 jms 596:
1.140 bowersj2 597:
1.416 jms 598: sub getDescription {
599: my $res = shift;
600: my $part = shift;
601: my $status = $res->status($part);
1.92 bowersj2 602:
1.416 jms 603: my $open = $res->opendate($part);
604: my $due = $res->duedate($part);
605: my $answer = $res->answerdate($part);
1.164 bowersj2 606:
1.416 jms 607: if ($status == $res->NETWORK_FAILURE) {
608: return &mt("Having technical difficulties; please check status later");
609: }
610: if ($status == $res->NOTHING_SET) {
611: return &mt("Not currently assigned.");
612: }
613: if ($status == $res->OPEN_LATER) {
614: return &mt("Open ") .timeToHumanString($open,'start');
615: }
1.432 raeburn 616: if ($res->simpleStatus($part) == $res->OPEN) {
617: unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
618: my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
619: if ($slot_status == $res->UNKNOWN) {
620: return &mt('Reservation status unknown');
621: } elsif ($slot_status == $res->RESERVED) {
1.433 bisitz 622: return &mt('Reserved - ends [_1]',
623: timeToHumanString($slot_time,'end'));
1.432 raeburn 624: } elsif ($slot_status == $res->RESERVED_LOCATION) {
1.433 bisitz 625: return &mt('Reserved - specific location(s) - ends [_1]',
626: timeToHumanString($slot_time,'end'));
1.432 raeburn 627: } elsif ($slot_status == $res->RESERVED_LATER) {
1.433 bisitz 628: return &mt('Reserved - next open [_1]',
629: timeToHumanString($slot_time,'start'));
1.432 raeburn 630: } elsif ($slot_status == $res->RESERVABLE) {
1.433 bisitz 631: return &mt('Reservable ending [_1]',
632: timeToHumanString($slot_time,'end'));
1.432 raeburn 633: } elsif ($slot_status == $res->RESERVABLE_LATER) {
1.433 bisitz 634: return &mt('Reservable starting [_1]',
635: timeToHumanString($slot_time,'start'));
1.432 raeburn 636: } elsif ($slot_status == $res->NOT_IN_A_SLOT) {
637: return &mt('Reserve a time/place to work');
638: } elsif ($slot_status == $res->NOTRESERVABLE) {
639: return &mt('Reservation not available');
640: } elsif ($slot_status == $res->WAITING_FOR_GRADE) {
641: return &mt('Submission in grading queue');
642: }
643: }
644: }
1.416 jms 645: if ($status == $res->OPEN) {
646: if ($due) {
647: if ($res->is_practice()) {
648: return &mt("Closes ")." " .timeToHumanString($due,'start');
649: } else {
650: return &mt("Due")." " .timeToHumanString($due,'end');
651: }
652: } else {
653: return &mt("Open, no due date");
654: }
655: }
656: if ($status == $res->PAST_DUE_ANSWER_LATER) {
657: return &mt("Answer open")." " .timeToHumanString($answer,'start');
658: }
659: if ($status == $res->PAST_DUE_NO_ANSWER) {
660: if ($res->is_practice()) {
661: return &mt("Closed")." " . timeToHumanString($due,'start');
662: } else {
663: return &mt("Was due")." " . timeToHumanString($due,'end');
664: }
665: }
666: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
667: && $res->handgrade($part) ne 'yes') {
668: return &mt("Answer available");
669: }
670: if ($status == $res->EXCUSED) {
671: return &mt("Excused by instructor");
672: }
673: if ($status == $res->ATTEMPTED) {
1.444 raeburn 674: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
675: return &mt("Survey submission recorded");
676: } else {
677: return &mt("Answer submitted, not yet graded");
678: }
1.416 jms 679: }
680: if ($status == $res->TRIES_LEFT) {
681: my $tries = $res->tries($part);
682: my $maxtries = $res->maxtries($part);
683: my $triesString = "";
684: if ($tries && $maxtries) {
1.422 raeburn 685: $triesString = '<font size="-1"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></font>';
1.416 jms 686: if ($maxtries > 1 && $maxtries - $tries == 1) {
687: $triesString = "<b>$triesString</b>";
688: }
689: }
690: if ($due) {
691: return &mt("Due")." " . timeToHumanString($due,'end') .
692: " $triesString";
693: } else {
694: return &mt("No due date")." $triesString";
695: }
696: }
697: if ($status == $res->ANSWER_SUBMITTED) {
698: return &mt('Answer submitted');
699: }
700: }
1.92 bowersj2 701:
1.51 bowersj2 702:
1.416 jms 703: sub dueInLessThan24Hours {
704: my $res = shift;
705: my $part = shift;
706: my $status = $res->status($part);
1.55 bowersj2 707:
1.416 jms 708: return ($status == $res->OPEN() ||
709: $status == $res->TRIES_LEFT()) &&
710: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
711: $res->duedate($part) > time();
712: }
1.84 bowersj2 713:
1.417 jms 714:
1.416 jms 715: sub lastTry {
716: my $res = shift;
717: my $part = shift;
1.115 bowersj2 718:
1.416 jms 719: my $tries = $res->tries($part);
720: my $maxtries = $res->maxtries($part);
721: return $tries && $maxtries && $maxtries > 1 &&
722: $maxtries - $tries == 1 && $res->duedate($part) &&
723: $res->duedate($part) > time();
724: }
1.55 bowersj2 725:
1.51 bowersj2 726:
1.416 jms 727: sub advancedUser {
728: return $env{'request.role.adv'};
729: }
1.51 bowersj2 730:
1.416 jms 731: sub timeToHumanString {
732: my ($time,$type,$format) = @_;
1.153 bowersj2 733:
1.416 jms 734: # zero, '0' and blank are bad times
735: if (!$time) {
736: return &mt('never');
737: }
738: unless (&Apache::lonlocal::current_language()=~/^en/) {
739: return &Apache::lonlocal::locallocaltime($time);
740: }
741: my $now = time();
1.174 albertel 742:
1.416 jms 743: # Positive = future
744: my $delta = $time - $now;
1.190 bowersj2 745:
1.416 jms 746: my $minute = 60;
747: my $hour = 60 * $minute;
748: my $day = 24 * $hour;
749: my $week = 7 * $day;
750: my $inPast = 0;
1.190 bowersj2 751:
1.416 jms 752: # Logic in comments:
753: # Is it now? (extremely unlikely)
754: if ( $delta == 0 ) {
755: return "this instant";
756: }
1.174 albertel 757:
1.416 jms 758: if ($delta < 0) {
759: $inPast = 1;
760: $delta = -$delta;
761: }
1.143 bowersj2 762:
1.416 jms 763: if ( $delta > 0 ) {
1.51 bowersj2 764:
1.416 jms 765: my $tense = $inPast ? " ago" : "";
766: my $prefix = $inPast ? "" : "in ";
767:
768: # Less than a minute
769: if ( $delta < $minute ) {
770: if ($delta == 1) { return "${prefix}1 second$tense"; }
771: return "$prefix$delta seconds$tense";
772: }
1.51 bowersj2 773:
1.416 jms 774: # Less than an hour
775: if ( $delta < $hour ) {
776: # If so, use minutes
777: my $minutes = floor($delta / 60);
778: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
779: return "$prefix$minutes minutes$tense";
780: }
781:
782: # Is it less than 24 hours away? If so,
783: # display hours + minutes
784: if ( $delta < $hour * 24) {
785: my $hours = floor($delta / $hour);
786: my $minutes = floor(($delta % $hour) / $minute);
787: my $hourString = "$hours hours";
788: my $minuteString = ", $minutes minutes";
789: if ($hours == 1) {
790: $hourString = "1 hour";
791: }
792: if ($minutes == 1) {
793: $minuteString = ", 1 minute";
794: }
795: if ($minutes == 0) {
796: $minuteString = "";
797: }
798: return "$prefix$hourString$minuteString$tense";
799: }
1.174 albertel 800:
1.416 jms 801: my $dt = DateTime->from_epoch(epoch => $time)
802: ->set_time_zone(&Apache::lonlocal::gettimezone());
1.216 bowersj2 803:
1.416 jms 804: # If there's a caller supplied format, use it.
1.145 bowersj2 805:
1.416 jms 806: if ($format ne '') {
807: my $timeStr = $dt->strftime($format);
808: return $timeStr.' ('.$dt->time_zone_short_name().')';
809: }
1.216 bowersj2 810:
1.416 jms 811: # Less than 5 days away, display day of the week and
812: # HH:MM
1.216 bowersj2 813:
1.416 jms 814: if ( $delta < $day * 5 ) {
815: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
816: $timeStr =~ s/12:00 am/00:00/;
817: $timeStr =~ s/12:00 pm/noon/;
818: return ($inPast ? "last " : "this ") .
819: $timeStr;
820: }
821:
822: my $conjunction='on';
823: if ($type eq 'start') {
824: $conjunction='at';
825: } elsif ($type eq 'end') {
826: $conjunction='by';
827: }
828: # Is it this year?
829: my $dt_now = DateTime->from_epoch(epoch => $now)
830: ->set_time_zone(&Apache::lonlocal::gettimezone());
831: if ( $dt->year() == $dt_now->year()) {
832: # Return on Month Day, HH:MM meridian
833: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
834: $timeStr =~ s/12:00 am/00:00/;
835: $timeStr =~ s/12:00 pm/noon/;
836: return $timeStr;
837: }
1.59 bowersj2 838:
1.416 jms 839: # Not this year, so show the year
840: my $timeStr =
841: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
842: $timeStr =~ s/12:00 am/00:00/;
843: $timeStr =~ s/12:00 pm/noon/;
844: return $timeStr;
845: }
846: }
1.59 bowersj2 847:
848:
1.133 bowersj2 849: sub resource { return 0; }
850: sub communication_status { return 1; }
851: sub quick_status { return 2; }
852: sub long_status { return 3; }
1.225 bowersj2 853: sub part_status_summary { return 4; }
1.51 bowersj2 854:
1.133 bowersj2 855: sub render_resource {
856: my ($resource, $part, $params) = @_;
1.51 bowersj2 857:
1.133 bowersj2 858: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 859:
1.134 bowersj2 860: my $link = $params->{"resourceLink"};
1.306 foxr 861:
862: # The URL part is not escaped at this point, but the symb is...
863:
1.134 bowersj2 864: my $src = $resource->src();
865: my $it = $params->{"iterator"};
1.133 bowersj2 866: my $filter = $it->{FILTER};
867:
868: my $title = $resource->compTitle();
1.258 albertel 869:
1.133 bowersj2 870: my $partLabel = "";
871: my $newBranchText = "";
1.298 albertel 872: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
1.133 bowersj2 873: # If this is a new branch, label it so
874: if ($params->{'isNewBranch'}) {
1.429 droeschl 875: $newBranchText = "<img src='$location/branch.gif' alt=".mt('Branch')." />";
1.51 bowersj2 876: }
877:
1.133 bowersj2 878: # links to open and close the folder
1.306 foxr 879:
1.427 droeschl 880: my $whitespace = $location.'/whitespace_21.gif';
881: my $linkopen = "<img src='$whitespace' alt='' />"."<a href=\"$link\">";
1.133 bowersj2 882: my $linkclose = "</a>";
1.51 bowersj2 883:
1.204 albertel 884: # Default icon: unknown page
1.426 droeschl 885: my $icon = "<img class=\"LC_contentImage\" src='$location/unknown.gif' alt='' />";
1.133 bowersj2 886:
887: if ($resource->is_problem()) {
1.192 bowersj2 888: if ($part eq '0' || $params->{'condensed'}) {
1.426 droeschl 889: $icon = '<img class="LC_contentImage" src="'.$location.'/';
1.389 albertel 890: if ($resource->is_task()) {
891: $icon .= 'task.gif" alt="'.&mt('Task');
892: } else {
893: $icon .= 'problem.gif" alt="'.&mt('Problem');
894: }
1.426 droeschl 895: $icon .='" />';
1.133 bowersj2 896: } else {
897: $icon = $params->{'indentString'};
898: }
1.204 albertel 899: } else {
1.426 droeschl 900: $icon = "<img class=\"LC_contentImage\" src='".&Apache::loncommon::icon($resource->src)."' alt='' />";
1.133 bowersj2 901: }
1.51 bowersj2 902:
1.133 bowersj2 903: # Display the correct map icon to open or shut map
904: if ($resource->is_map()) {
905: my $mapId = $resource->map_pc();
906: my $nowOpen = !defined($filter->{$mapId});
907: if ($it->{CONDITION}) {
908: $nowOpen = !$nowOpen;
909: }
1.426 droeschl 910:
1.205 bowersj2 911: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1.362 www 912: my $title=$resource->title;
1.426 droeschl 913: $title=~s/\"/\&qout;/g;
1.144 bowersj2 914: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 915: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.426 droeschl 916: $icon = "<img src='$location/arrow." . ($nowOpen ? 'closed' : 'open') . ".gif' alt='' />"
917: ."<img class=\"LC_contentImage\" src='$location/$icon' alt=\""
918: .($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1.349 foxr 919: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1.392 albertel 920: $params->{'queryString'} . '&filter=';
1.144 bowersj2 921: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
922: addToFilter($filter, $mapId) :
923: removeFromFilter($filter, $mapId);
1.392 albertel 924: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
925: . $params->{'hereType'} . '&here=' .
1.384 www 926: &escape($params->{'here'}) .
1.392 albertel 927: '&jump=' .
1.384 www 928: &escape($resource->symb()) .
1.392 albertel 929: "&folderManip=1\">";
1.306 foxr 930:
1.144 bowersj2 931: } else {
932: # Don't allow users to manipulate folder
1.426 droeschl 933: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.427 droeschl 934: $icon = "<img class=\"LC_space\" src='$whitespace' alt='' />"."<img class=\"LC_contentImage\" src='$location/$icon' alt=\"".($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1.144 bowersj2 935:
936: $linkopen = "";
937: $linkclose = "";
938: }
1.133 bowersj2 939: }
1.51 bowersj2 940:
1.133 bowersj2 941: if ($resource->randomout()) {
1.362 www 942: $nonLinkedText .= ' <i>('.&mt('hidden').')</i> ';
1.133 bowersj2 943: }
1.342 albertel 944: if (!$resource->condval()) {
1.362 www 945: $nonLinkedText .= ' <i>('.&mt('conditionally hidden').')</i> ';
1.342 albertel 946: }
1.413 www 947: if (($resource->is_practice()) && ($resource->is_raw_problem())) {
1.412 www 948: $nonLinkedText .=' <font color="green"><b>'.&mt('not graded').'</b></font>';
949: }
1.426 droeschl 950:
1.133 bowersj2 951: # We're done preparing and finally ready to start the rendering
1.426 droeschl 952: my $result = '<td class="LC_middle">';
953: my $newfolderType = $resource->is_sequence() ? 'folder' : 'page';
954:
1.140 bowersj2 955: my $indentLevel = $params->{'indentLevel'};
956: if ($newBranchText) { $indentLevel--; }
957:
1.133 bowersj2 958: # print indentation
1.140 bowersj2 959: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 960: $result .= $params->{'indentString'};
1.84 bowersj2 961: }
962:
1.133 bowersj2 963: # Decide what to display
964: $result .= "$newBranchText$linkopen$icon$linkclose";
965:
966: my $curMarkerBegin = '';
967: my $curMarkerEnd = '';
1.51 bowersj2 968:
1.133 bowersj2 969: # Is this the current resource?
1.158 bowersj2 970: if (!$params->{'displayedHereMarker'} &&
971: $resource->symb() eq $params->{'here'} ) {
1.430 schulted 972: $curMarkerBegin = '<em>';
1.424 schulted 973: $curMarkerEnd = '</em>';
974: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 975: }
976:
1.192 bowersj2 977: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 978: !$params->{'condensed'}) {
1.274 matthew 979: my $displaypart=$resource->part_display($part);
1.363 albertel 980: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1.384 www 981: if ($link!~/\#/) { $link.='#'.&escape($part); }
1.133 bowersj2 982: $title = "";
1.51 bowersj2 983: }
984:
1.163 bowersj2 985: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.363 albertel 986: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1.51 bowersj2 987: }
988:
1.266 raeburn 989: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.445 droeschl 990: $result .= "$curMarkerBegin<a href=\"$link\">$title$partLabel</a>$curMarkerEnd$nonLinkedText</td>";
1.144 bowersj2 991: } else {
1.426 droeschl 992: $result .= "$curMarkerBegin$linkopen$title$partLabel</a>$curMarkerEnd$nonLinkedText</td>";
1.144 bowersj2 993: }
1.51 bowersj2 994:
1.133 bowersj2 995: return $result;
996: }
1.51 bowersj2 997:
1.133 bowersj2 998: sub render_communication_status {
999: my ($resource, $part, $params) = @_;
1.134 bowersj2 1000: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1001:
1002: my $link = $params->{"resourceLink"};
1.445 droeschl 1003: my $linkopen = "<a href=\"$link\">";
1.134 bowersj2 1004: my $linkclose = "</a>";
1.298 albertel 1005: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.134 bowersj2 1006: if ($resource->hasDiscussion()) {
1007: $discussionHTML = $linkopen .
1.442 wenzelju 1008: '<img alt="'.&mt('New Discussion').'" src="'.$location.'/chat.gif" title="'.&mt('New Discussion').'"/>' .
1.134 bowersj2 1009: $linkclose;
1010: }
1011:
1012: if ($resource->getFeedback()) {
1013: my $feedback = $resource->getFeedback();
1.394 raeburn 1014: foreach my $msgid (split(/\,/, $feedback)) {
1015: if ($msgid) {
1.445 droeschl 1016: $feedbackHTML .= ' <a href="/adm/email?display='
1.394 raeburn 1017: . &escape($msgid) . '">'
1.442 wenzelju 1018: . '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" title="'.&mt('New E-mail').'"/></a>';
1.134 bowersj2 1019: }
1020: }
1021: }
1022:
1023: if ($resource->getErrors()) {
1024: my $errors = $resource->getErrors();
1.254 matthew 1025: my $errorcount = 0;
1.394 raeburn 1026: foreach my $msgid (split(/,/, $errors)) {
1.254 matthew 1027: last if ($errorcount>=10); # Only output 10 bombs maximum
1.394 raeburn 1028: if ($msgid) {
1.254 matthew 1029: $errorcount++;
1.445 droeschl 1030: $errorHTML .= ' <a href="/adm/email?display='
1.394 raeburn 1031: . &escape($msgid) . '">'
1.442 wenzelju 1032: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" title="'.&mt('New Error').'"/></a>';
1.134 bowersj2 1033: }
1034: }
1.197 bowersj2 1035: }
1036:
1037: if ($params->{'multipart'} && $part != '0') {
1038: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 1039: }
1.426 droeschl 1040: return "<td class=\"LC_middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1.134 bowersj2 1041:
1.133 bowersj2 1042: }
1043: sub render_quick_status {
1044: my ($resource, $part, $params) = @_;
1.135 bowersj2 1045: my $result = "";
1046: my $firstDisplayed = !$params->{'condensed'} &&
1047: $params->{'multipart'} && $part eq "0";
1048:
1049: my $link = $params->{"resourceLink"};
1.445 droeschl 1050: my $linkopen = "<a href=\"$link\">";
1.135 bowersj2 1051: my $linkclose = "</a>";
1.426 droeschl 1052:
1053: $result .= '<td class="LC_middle">';
1.135 bowersj2 1054: if ($resource->is_problem() &&
1055: !$firstDisplayed) {
1.224 bowersj2 1056: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 1057: my $alt = $iconAltTags{$icon};
1058: if ($icon) {
1.298 albertel 1059: my $location=
1060: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1.438 wenzelju 1061: $result .= $linkopen.'<img src="'.$location.'" alt="'.&mt($alt).'" title="'.&mt($alt).'" />'.$linkclose;
1.135 bowersj2 1062: } else {
1.426 droeschl 1063: $result .= " ";
1.135 bowersj2 1064: }
1065: } else { # not problem, no icon
1.426 droeschl 1066: $result .= " ";
1.135 bowersj2 1067: }
1.426 droeschl 1068: $result .= "</td>\n";
1.135 bowersj2 1069: return $result;
1.133 bowersj2 1070: }
1071: sub render_long_status {
1072: my ($resource, $part, $params) = @_;
1.426 droeschl 1073: my $result = '<td class="LC_middle LC_right">';
1.136 bowersj2 1074: my $firstDisplayed = !$params->{'condensed'} &&
1075: $params->{'multipart'} && $part eq "0";
1076:
1077: my $color;
1.402 albertel 1078: if ($resource->is_problem() || $resource->is_practice()) {
1.136 bowersj2 1079: $color = $colormap{$resource->status};
1080:
1.252 matthew 1081: if (dueInLessThan24Hours($resource, $part) ||
1.136 bowersj2 1082: lastTry($resource, $part)) {
1083: $color = $hurryUpColor;
1084: }
1085: }
1086:
1087: if ($resource->kind() eq "res" &&
1.402 albertel 1088: ($resource->is_problem() || $resource->is_practice()) &&
1.136 bowersj2 1089: !$firstDisplayed) {
1090: if ($color) {$result .= "<font color=\"$color\"><b>"; }
1091: $result .= getDescription($resource, $part);
1092: if ($color) {$result .= "</b></font>"; }
1093: }
1.402 albertel 1094: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1.400 albertel 1095: $result .= &mt('(randomly select [_1])', $resource->randompick());
1096: }
1097: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1098: $result .= &mt('(randomly ordered)');
1.136 bowersj2 1099: }
1.210 bowersj2 1100:
1.213 bowersj2 1101: # Debugging code
1102: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1103: # ' - Part: ' . $part;
1104:
1.210 bowersj2 1105: $result .= "</td>\n";
1.136 bowersj2 1106:
1107: return $result;
1.51 bowersj2 1108: }
1109:
1.227 bowersj2 1110: # Colors obtained by taking the icons, matching the colors, and
1111: # possibly reducing the Value (HSV) of the color, if it's too bright
1112: # for text, generally by one third or so.
1.225 bowersj2 1113: my %statusColors =
1114: (
1115: $resObj->CLOSED => '#000000',
1.227 bowersj2 1116: $resObj->OPEN => '#998b13',
1117: $resObj->CORRECT => '#26933f',
1118: $resObj->INCORRECT => '#c48207',
1119: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1120: $resObj->ERROR => '#000000'
1121: );
1122: my %statusStrings =
1123: (
1124: $resObj->CLOSED => 'Not yet open',
1125: $resObj->OPEN => 'Open',
1126: $resObj->CORRECT => 'Correct',
1127: $resObj->INCORRECT => 'Incorrect',
1128: $resObj->ATTEMPTED => 'Attempted',
1129: $resObj->ERROR => 'Network Error'
1130: );
1131: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1132:
1133: sub render_parts_summary_status {
1134: my ($resource, $part, $params) = @_;
1.256 albertel 1135: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1136: if ($params->{showParts}) {
1137: return '<td></td>';
1138: }
1139:
1140: my $td = "<td align='right'>\n";
1141: my $endtd = "</td>\n";
1.256 albertel 1142: my @probs;
1.225 bowersj2 1143:
1.256 albertel 1144: if ($resource->contains_problem) {
1145: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1146: } else {
1147: @probs=($resource);
1148: }
1149: my $return;
1150: my %overallstatus;
1151: my $totalParts;
1152: foreach my $resource (@probs) {
1153: # If there is a single part, just show the simple status
1154: if ($resource->singlepart()) {
1155: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1156: $overallstatus{$status}++;
1157: $totalParts++;
1158: next;
1159: }
1160: # Now we can be sure the $part doesn't really matter.
1161: my $statusCount = $resource->simpleStatusCount();
1162: my @counts;
1163: foreach my $status (@statuses) {
1164: # decouple display order from the simpleStatusCount order
1165: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1166: if ($statusCount->[$slot]) {
1167: $overallstatus{$status}+=$statusCount->[$slot];
1168: $totalParts+=$statusCount->[$slot];
1169: }
1170: }
1171: }
1172: $return.= $td . $totalParts . ' parts: ';
1173: foreach my $status (@statuses) {
1174: if ($overallstatus{$status}) {
1175: $return.="<font color='" . $statusColors{$status} .
1176: "'>" . $overallstatus{$status} . ' '
1.225 bowersj2 1177: . $statusStrings{$status} . "</font>";
1178: }
1179: }
1.256 albertel 1180: $return.= $endtd;
1181: return $return;
1.225 bowersj2 1182: }
1183:
1.133 bowersj2 1184: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1185: \&render_quick_status, \&render_long_status,
1186: \&render_parts_summary_status);
1.132 bowersj2 1187:
1188: sub setDefault {
1189: my ($val, $default) = @_;
1190: if (!defined($val)) { return $default; }
1191: return $val;
1192: }
1193:
1.296 albertel 1194: sub cmp_title {
1195: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1196: $atitle=~s/^\s*//;
1197: $btitle=~s/^\s*//;
1198: return $atitle cmp $btitle;
1199: }
1200:
1.132 bowersj2 1201: sub render {
1202: my $args = shift;
1.140 bowersj2 1203: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1204: my $result = '';
1.132 bowersj2 1205: # Configure the renderer.
1206: my $cols = $args->{'cols'};
1207: if (!defined($cols)) {
1208: # no columns, no nav maps.
1209: return '';
1210: }
1.140 bowersj2 1211: my $navmap;
1212: if (defined($args->{'navmap'})) {
1213: $navmap = $args->{'navmap'};
1214: }
1215:
1.158 bowersj2 1216: my $r = $args->{'r'};
1.140 bowersj2 1217: my $queryString = $args->{'queryString'};
1.159 bowersj2 1218: my $jump = $args->{'jump'};
1.158 bowersj2 1219: my $here = $args->{'here'};
1.153 bowersj2 1220: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1221: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1222: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1223: # before the current resource when using #current
1224:
1225: # If we were passed 'here' information, we are not rendering
1226: # after a folder manipulation, and we were not passed an
1227: # iterator, make sure we open the folders to show the "here"
1228: # marker
1229: my $filterHash = {};
1230: # Figure out what we're not displaying
1.394 raeburn 1231: foreach my $item (split(/\,/, $env{"form.filter"})) {
1232: if ($item) {
1233: $filterHash->{$item} = "1";
1.140 bowersj2 1234: }
1235: }
1236:
1.191 bowersj2 1237: # Filter: Remember filter function and add our own filter: Refuse
1238: # to show hidden resources unless the user can see them.
1239: my $userCanSeeHidden = advancedUser();
1240: my $filterFunc = setDefault($args->{'filterFunc'},
1241: sub {return 1;});
1242: if (!$userCanSeeHidden) {
1243: # Without renaming the filterfunc, the server seems to go into
1244: # an infinite loop
1245: my $oldFilterFunc = $filterFunc;
1246: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1247: &$oldFilterFunc($res);};
1248: }
1249:
1.140 bowersj2 1250: my $condition = 0;
1.320 albertel 1251: if ($env{'form.condition'}) {
1.140 bowersj2 1252: $condition = 1;
1253: }
1254:
1.320 albertel 1255: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1.140 bowersj2 1256: # Step 1: Check to see if we have a navmap
1257: if (!defined($navmap)) {
1.221 bowersj2 1258: $navmap = Apache::lonnavmaps::navmap->new();
1.340 albertel 1259: if (!defined($navmap)) {
1.423 raeburn 1260: # no longer in course
1.388 albertel 1261: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1.362 www 1262: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1.340 albertel 1263: }
1264: }
1.140 bowersj2 1265:
1266: # Step two: Locate what kind of here marker is necessary
1267: # Determine where the "here" marker is and where the screen jumps to.
1268:
1.332 albertel 1269: if ($env{'form.postsymb'} ne '') {
1.320 albertel 1270: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1.332 albertel 1271: } elsif ($env{'form.postdata'} ne '') {
1.140 bowersj2 1272: # couldn't find a symb, is there a URL?
1.320 albertel 1273: my $currenturl = $env{'form.postdata'};
1.158 bowersj2 1274: #$currenturl=~s/^http\:\/\///;
1275: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1276:
1.158 bowersj2 1277: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.331 albertel 1278: }
1279: if ($here eq '') {
1.317 albertel 1280: my $last;
1.320 albertel 1281: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1.317 albertel 1282: &GDBM_READER(),0640)) {
1283: $last=$hash{'last_known'};
1284: untie(%hash);
1285: }
1286: if ($last) { $here = $jump = $last; }
1287: }
1.158 bowersj2 1288:
1.140 bowersj2 1289: # Step three: Ensure the folders are open
1290: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1291: my $curRes;
1.140 bowersj2 1292: my $found = 0;
1293:
1294: # We only need to do this if we need to open the maps to show the
1295: # current position. This will change the counter so we can't count
1296: # for the jump marker with this loop.
1.294 albertel 1297: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1298: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1299: my $mapStack = $mapIterator->getStack();
1300:
1301: # Ensure the parent maps are open
1302: for my $map (@{$mapStack}) {
1303: if ($condition) {
1304: undef $filterHash->{$map->map_pc()};
1305: } else {
1306: $filterHash->{$map->map_pc()} = 1;
1307: }
1308: }
1309: $found = 1;
1310: }
1311: }
1.159 bowersj2 1312: }
1.140 bowersj2 1313:
1.320 albertel 1314: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1.140 bowersj2 1315: # If this is a click on a folder or something, we want to preserve the "here"
1316: # from the querystring, and get the new "jump" marker
1.320 albertel 1317: $here = $env{'form.here'};
1318: $jump = $env{'form.jump'};
1.140 bowersj2 1319: }
1320:
1.132 bowersj2 1321: my $it = $args->{'iterator'};
1322: if (!defined($it)) {
1.320 albertel 1323: # Construct a default iterator based on $env{'form.'} information
1.140 bowersj2 1324:
1325: # Step 1: Check to see if we have a navmap
1326: if (!defined($navmap)) {
1.221 bowersj2 1327: $navmap = Apache::lonnavmaps::navmap->new();
1.423 raeburn 1328: if (!defined($navmap)) {
1329: # no longer in course
1330: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1331: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1332: }
1.140 bowersj2 1333: }
1334:
1.144 bowersj2 1335: # See if we're being passed a specific map
1336: if ($args->{'iterator_map'}) {
1337: my $map = $args->{'iterator_map'};
1.145 bowersj2 1338: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1339: my $firstResource = $map->map_start();
1340: my $finishResource = $map->map_finish();
1341:
1342: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1343: } else {
1.401 albertel 1344: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1.144 bowersj2 1345: }
1.132 bowersj2 1346: }
1.256 albertel 1347:
1.159 bowersj2 1348: # (re-)Locate the jump point, if any
1.191 bowersj2 1349: # Note this does not take filtering or hidden into account... need
1350: # to be fixed?
1.159 bowersj2 1351: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1352: my $curRes;
1.159 bowersj2 1353: my $foundJump = 0;
1354: my $counter = 0;
1355:
1.222 bowersj2 1356: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1357: if (ref($curRes)) { $counter++; }
1358:
1359: if (ref($curRes) && $jump eq $curRes->symb()) {
1360:
1361: # This is why we have to use the main iterator instead of the
1362: # potentially faster DFS: The count has to be the same, so
1363: # the order has to be the same, which DFS won't give us.
1364: $args->{'currentJumpIndex'} = $counter;
1365: $foundJump = 1;
1366: }
1367: }
1368:
1.132 bowersj2 1369: my $showParts = setDefault($args->{'showParts'}, 1);
1370: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1371: # keeps track of when the current resource is found,
1372: # so we can back up a few and put the anchor above the
1373: # current resource
1.140 bowersj2 1374: my $printKey = $args->{'printKey'};
1375: my $printCloseAll = $args->{'printCloseAll'};
1376: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.425 schulted 1377:
1.140 bowersj2 1378: # Print key?
1379: if ($printKey) {
1380: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1381: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1.298 albertel 1382: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.140 bowersj2 1383: if ($navmap->{LAST_CHECK}) {
1384: $result .=
1.434 bisitz 1385: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('New discussion since').' '.
1.140 bowersj2 1386: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1387: '</td><td align="center" valign="bottom"> '.
1.434 bisitz 1388: '<img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1389: '</td>';
1390: } else {
1391: $result .= '<td align="center" valign="bottom"> '.
1.434 bisitz 1392: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1393: ' <img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').
1.140 bowersj2 1394: '</td>';
1395: }
1396:
1397: $result .= '</tr></table>';
1398: }
1399:
1.172 bowersj2 1400: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1401: my ($link,$text);
1.140 bowersj2 1402: if ($condition) {
1.446 ! raeburn 1403: $link='navmaps?condition=0&filter=&'.$queryString.
! 1404: '&here='.&escape($here);
1.377 www 1405: $text='Close all folders';
1.140 bowersj2 1406: } else {
1.446 ! raeburn 1407: $link='navmaps?condition=1&filter=&'.$queryString.
! 1408: '&here='.&escape($here);
1.377 www 1409: $text='Open all folders';
1.281 albertel 1410: }
1.446 ! raeburn 1411: if ($env{'form.register'}) {
! 1412: $link .= '&register='.$env{'form.register'};
! 1413: }
1.281 albertel 1414: if ($args->{'caller'} eq 'navmapsdisplay') {
1415: &add_linkitem($args->{'linkitems'},'changefolder',
1.446 ! raeburn 1416: "location.href='$link'",$text);
1.281 albertel 1417: } else {
1.446 ! raeburn 1418: $result.= '<a href="'.$link.'">'.&mt($text).'</a>';
1.281 albertel 1419: }
1.266 raeburn 1420: $result .= "\n";
1421: }
1.140 bowersj2 1422:
1.266 raeburn 1423: # Check for any unread discussions in all resources.
1.281 albertel 1424: if ($args->{'caller'} eq 'navmapsdisplay') {
1.296 albertel 1425: &add_linkitem($args->{'linkitems'},'clearbubbles',
1426: 'document.clearbubbles.submit()',
1427: 'Mark all posts read');
1.297 albertel 1428: my $time=time;
1.296 albertel 1429: $result .= (<<END);
1430: <form name="clearbubbles" method="post" action="/adm/feedback">
1431: <input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
1.297 albertel 1432: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1433: END
1.446 ! raeburn 1434: if ($env{'form.register'}) {
! 1435: $result .= '<input type="hidden" name="register" value="'.$env{'form.register'}.'" />';
! 1436: }
1.296 albertel 1437: if ($args->{'sort'} eq 'discussion') {
1438: my $totdisc = 0;
1439: my $haveDisc = '';
1440: my @allres=$navmap->retrieveResources();
1441: foreach my $resource (@allres) {
1442: if ($resource->hasDiscussion()) {
1.323 albertel 1443: $haveDisc .= $resource->wrap_symb().':';
1.296 albertel 1444: $totdisc ++;
1.267 albertel 1445: }
1446: }
1.296 albertel 1447: if ($totdisc > 0) {
1448: $haveDisc =~ s/:$//;
1449: $result .= (<<END);
1450: <input type="hidden" name="navmaps" value="$haveDisc" />
1451: </form>
1452: END
1453: }
1.297 albertel 1454: }
1455: $result.='</form>';
1.266 raeburn 1456: }
1.276 albertel 1457:
1.281 albertel 1458: if ($args->{'caller'} eq 'navmapsdisplay') {
1.283 raeburn 1459: $result .= '<table><tr><td>'.
1.388 albertel 1460: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',undef,'RAT').'</td>';
1.283 raeburn 1461: $result .= '<td> </td>';
1.446 ! raeburn 1462: $result.='<td class="LC_middle">'.&mt('Tools:').'</td>';
1.430 schulted 1463: $result.=&show_linkitems_toolbar($args->{'linkitems'});
1.281 albertel 1464: if ($args->{'sort_html'}) {
1.445 droeschl 1465: $result.='<td> </td><td> </td><td> </td>'.
1466: '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
1467: }
1.281 albertel 1468: $result .= '</table>';
1469: } elsif ($args->{'sort_html'}) {
1470: $result.=$args->{'sort_html'};
1471: }
1.276 albertel 1472:
1.425 schulted 1473: #$result .= "<br />\n";
1.140 bowersj2 1474: if ($r) {
1475: $r->print($result);
1476: $r->rflush();
1477: $result = "";
1478: }
1.132 bowersj2 1479: # End parameter setting
1.425 schulted 1480:
1481: $result .= "<br />\n";
1482:
1.132 bowersj2 1483: # Data
1.431 schulted 1484: $result.=&Apache::loncommon::start_data_table("LC_tableOfContent");
1.426 droeschl 1485:
1.132 bowersj2 1486: my $res = "Apache::lonnavmaps::resource";
1487: my %condenseStatuses =
1488: ( $res->NETWORK_FAILURE => 1,
1489: $res->NOTHING_SET => 1,
1490: $res->CORRECT => 1 );
1.133 bowersj2 1491:
1492: # Shared variables
1493: $args->{'counter'} = 0; # counts the rows
1494: $args->{'indentLevel'} = 0;
1495: $args->{'isNewBranch'} = 0;
1.426 droeschl 1496: $args->{'condensed'} = 0;
1497:
1.428 droeschl 1498: my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
1.426 droeschl 1499: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' alt='' />");
1.133 bowersj2 1500: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1501:
1.190 bowersj2 1502: # If we're suppressing empty sequences, look for them here. Use DFS for speed,
1503: # since structure actually doesn't matter, except what map has what resources.
1504: if ($args->{'suppressEmptySequences'}) {
1505: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1506: $it->{FIRST_RESOURCE},
1507: $it->{FINISH_RESOURCE},
1508: {}, undef, 1);
1.222 bowersj2 1509: my $depth = 0;
1.190 bowersj2 1510: $dfsit->next();
1511: my $curRes = $dfsit->next();
1512: while ($depth > -1) {
1513: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1514: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1515:
1516: if (ref($curRes)) {
1517: # Parallel pre-processing: Do sequences have non-filtered-out children?
1.201 bowersj2 1518: if ($curRes->is_map()) {
1.190 bowersj2 1519: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1520: # Sequences themselves do not count as visible children,
1521: # unless those sequences also have visible children.
1522: # This means if a sequence appears, there's a "promise"
1523: # that there's something under it if you open it, somewhere.
1524: } else {
1525: # Not a sequence: if it's filtered, ignore it, otherwise
1526: # rise up the stack and mark the sequences as having children
1527: if (&$filterFunc($curRes)) {
1528: for my $sequence (@{$dfsit->getStack()}) {
1529: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1530: }
1531: }
1532: }
1533: }
1534: } continue {
1535: $curRes = $dfsit->next();
1536: }
1537: }
1538:
1.133 bowersj2 1539: my $displayedJumpMarker = 0;
1.132 bowersj2 1540: # Set up iteration.
1541: my $now = time();
1542: my $in24Hours = $now + 24 * 60 * 60;
1543: my $rownum = 0;
1544:
1.141 bowersj2 1545: # export "here" marker information
1546: $args->{'here'} = $here;
1547:
1.222 bowersj2 1548: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1549: my @resources;
1550: my $code='';# sub { !(shift->is_map();) };
1551: if ($args->{'sort'} eq 'title') {
1.276 albertel 1552: my $oldFilterFunc = $filterFunc;
1553: my $filterFunc=
1554: sub {
1555: my ($res)=@_;
1556: if ($res->is_map()) { return 0;}
1557: return &$oldFilterFunc($res);
1558: };
1559: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1560: @resources= sort { &cmp_title($a,$b) } @resources;
1561: } elsif ($args->{'sort'} eq 'duedate') {
1562: my $oldFilterFunc = $filterFunc;
1563: my $filterFunc=
1564: sub {
1565: my ($res)=@_;
1566: if (!$res->is_problem()) { return 0;}
1567: return &$oldFilterFunc($res);
1568: };
1569: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1570: @resources= sort {
1.270 albertel 1571: if ($a->duedate ne $b->duedate) {
1572: return $a->duedate cmp $b->duedate;
1573: }
1.296 albertel 1574: my $value=&cmp_title($a,$b);
1575: return $value;
1.270 albertel 1576: } @resources;
1.296 albertel 1577: } elsif ($args->{'sort'} eq 'discussion') {
1578: my $oldFilterFunc = $filterFunc;
1579: my $filterFunc=
1580: sub {
1581: my ($res)=@_;
1582: if (!$res->hasDiscussion() &&
1583: !$res->getFeedback() &&
1584: !$res->getErrors()) { return 0;}
1585: return &$oldFilterFunc($res);
1586: };
1587: @resources=$navmap->retrieveResources(undef,$filterFunc);
1588: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1589: } else {
1590: #unknow sort mechanism or default
1591: undef($args->{'sort'});
1.270 albertel 1592: }
1593:
1.276 albertel 1594:
1.270 albertel 1595: while (1) {
1596: if ($args->{'sort'}) {
1597: $curRes = shift(@resources);
1598: } else {
1599: $curRes = $it->next($closeAllPages);
1600: }
1601: if (!$curRes) { last; }
1602:
1.132 bowersj2 1603: # Maintain indentation level.
1604: if ($curRes == $it->BEGIN_MAP() ||
1605: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1606: $args->{'indentLevel'}++;
1.132 bowersj2 1607: }
1608: if ($curRes == $it->END_MAP() ||
1609: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1610: $args->{'indentLevel'}--;
1.132 bowersj2 1611: }
1612: # Notice new branches
1613: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1614: $args->{'isNewBranch'} = 1;
1615: }
1616:
1617: # If this isn't an actual resource, continue on
1618: if (!ref($curRes)) {
1619: next;
1.132 bowersj2 1620: }
1.133 bowersj2 1621:
1.143 bowersj2 1622: # If this has been filtered out, continue on
1623: if (!(&$filterFunc($curRes))) {
1624: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1625: next;
1626: }
1.132 bowersj2 1627:
1.190 bowersj2 1628: # If this is an empty sequence and we're filtering them, continue on
1.201 bowersj2 1629: if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&
1.190 bowersj2 1630: !$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {
1631: next;
1632: }
1633:
1.153 bowersj2 1634: # If we're suppressing navmaps and this is a navmap, continue on
1635: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1636: next;
1637: }
1638:
1.191 bowersj2 1639: $args->{'counter'}++;
1640:
1.132 bowersj2 1641: # Does it have multiple parts?
1.133 bowersj2 1642: $args->{'multipart'} = 0;
1643: $args->{'condensed'} = 0;
1.132 bowersj2 1644: my @parts;
1645:
1646: # Decide what parts to show.
1.133 bowersj2 1647: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1648: @parts = @{$curRes->parts()};
1.192 bowersj2 1649: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1650:
1651: if ($condenseParts) { # do the condensation
1.133 bowersj2 1652: if (!$args->{'condensed'}) {
1.132 bowersj2 1653: # Decide whether to condense based on similarity
1.192 bowersj2 1654: my $status = $curRes->status($parts[0]);
1655: my $due = $curRes->duedate($parts[0]);
1656: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1657: my $statusAllSame = 1;
1658: my $dueAllSame = 1;
1659: my $openAllSame = 1;
1.192 bowersj2 1660: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1661: if ($curRes->status($parts[$i]) != $status){
1662: $statusAllSame = 0;
1663: }
1664: if ($curRes->duedate($parts[$i]) != $due ) {
1665: $dueAllSame = 0;
1666: }
1667: if ($curRes->opendate($parts[$i]) != $open) {
1668: $openAllSame = 0;
1669: }
1670: }
1671: # $*allSame is true if all the statuses were
1672: # the same. Now, if they are all the same and
1673: # match one of the statuses to condense, or they
1674: # are all open with the same due date, or they are
1675: # all OPEN_LATER with the same open date, display the
1676: # status of the first non-zero part (to get the 'correct'
1677: # status right, since 0 is never 'correct' or 'open').
1678: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1679: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1680: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1681: @parts = ($parts[0]);
1.133 bowersj2 1682: $args->{'condensed'} = 1;
1.132 bowersj2 1683: }
1684: }
1.198 bowersj2 1685: # Multipart problem with one part: always "condense" (happens
1686: # to match the desirable behavior)
1687: if ($curRes->countParts() == 1) {
1688: @parts = ($parts[0]);
1689: $args->{'condensed'} = 1;
1690: }
1.132 bowersj2 1691: }
1.157 bowersj2 1692: }
1.132 bowersj2 1693:
1694: # If the multipart problem was condensed, "forget" it was multipart
1695: if (scalar(@parts) == 1) {
1.133 bowersj2 1696: $args->{'multipart'} = 0;
1.192 bowersj2 1697: } else {
1698: # Add part 0 so we display it correctly.
1699: unshift @parts, '0';
1.132 bowersj2 1700: }
1.310 albertel 1701:
1702: {
1703: my ($src,$symb,$anchor,$stack);
1704: if ($args->{'sort'}) {
1705: my $it = $navmap->getIterator(undef, undef, undef, 1);
1706: while ( my $res=$it->next()) {
1707: if (ref($res) &&
1708: $res->symb() eq $curRes->symb()) { last; }
1709: }
1710: $stack=$it->getStack();
1711: } else {
1712: $stack=$it->getStack();
1713: }
1714: ($src,$symb,$anchor)=getLinkForResource($stack);
1715: if (defined($anchor)) { $anchor='#'.$anchor; }
1716: my $srcHasQuestion = $src =~ /\?/;
1717: $args->{"resourceLink"} = $src.
1718: ($srcHasQuestion?'&':'?') .
1.384 www 1719: 'symb=' . &escape($symb).$anchor;
1.310 albertel 1720: }
1.132 bowersj2 1721: # Now, we've decided what parts to show. Loop through them and
1722: # show them.
1.192 bowersj2 1723: foreach my $part (@parts) {
1.132 bowersj2 1724: $rownum ++;
1725:
1.431 schulted 1726: $result .= &Apache::loncommon::start_data_table_row();
1.134 bowersj2 1727:
1728: # Set up some data about the parts that the cols might want
1729: my $filter = $it->{FILTER};
1.270 albertel 1730:
1.132 bowersj2 1731: # Now, display each column.
1732: foreach my $col (@$cols) {
1.139 bowersj2 1733: my $colHTML = '';
1734: if (ref($col)) {
1735: $colHTML .= &$col($curRes, $part, $args);
1736: } else {
1737: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1738: }
1.132 bowersj2 1739:
1.133 bowersj2 1740: # If this is the first column and it's time to print
1741: # the anchor, do so
1742: if ($col == $cols->[0] &&
1743: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1744: $currentJumpDelta) {
1745: # Jam the anchor after the <td> tag;
1746: # necessary for valid HTML (which Mozilla requires)
1747: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1748: $displayedJumpMarker = 1;
1749: }
1.139 bowersj2 1750: $result .= $colHTML . "\n";
1.132 bowersj2 1751: }
1.431 schulted 1752: $result .= &Apache::loncommon::end_data_table_row();
1.140 bowersj2 1753: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1754: }
1.153 bowersj2 1755:
1.139 bowersj2 1756: if ($r && $rownum % 20 == 0) {
1757: $r->print($result);
1758: $result = "";
1759: $r->rflush();
1.132 bowersj2 1760: }
1.156 bowersj2 1761: } continue {
1.208 bowersj2 1762: if ($r) {
1763: # If we have the connection, make sure the user is still connected
1764: my $c = $r->connection;
1765: if ($c->aborted()) {
1766: # Who cares what we do, nobody will see it anyhow.
1767: return '';
1768: }
1769: }
1.132 bowersj2 1770: }
1771:
1.134 bowersj2 1772: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1773: # delay needed because the browser is processing the jump before
1774: # it finishes rendering, so it goes to the wrong place!
1775: # onload might be better, but this routine has no access to that.
1776: # On mozilla, the 0-millisecond timeout seems to prevent this;
1777: # it's quite likely this might fix other browsers, too, and
1778: # certainly won't hurt anything.
1.139 bowersj2 1779: if ($displayedJumpMarker) {
1.247 albertel 1780: $result .= "
1781: <script>
1782: if (location.href.indexOf('#curloc')==-1) {
1783: setTimeout(\"location += '#curloc';\", 0)
1784: }
1785: </script>";
1.134 bowersj2 1786: }
1787:
1.431 schulted 1788: $result.=&Apache::loncommon::end_data_table();
1789:
1.140 bowersj2 1790: if ($r) {
1791: $r->print($result);
1792: $result = "";
1793: $r->rflush();
1794: }
1795:
1.132 bowersj2 1796: return $result;
1797: }
1798:
1.281 albertel 1799: sub add_linkitem {
1800: my ($linkitems,$name,$cmd,$text)=@_;
1801: $$linkitems{$name}{'cmd'}=$cmd;
1802: $$linkitems{$name}{'text'}=&mt($text);
1803: }
1804:
1805: sub show_linkitems {
1806: my ($linkitems)=@_;
1.312 albertel 1807: my @linkorder = ("blank","launchnav","closenav","firsthomework",
1808: "everything","uncompleted","changefolder","clearbubbles");
1.281 albertel 1809:
1810: my $result .= (<<ENDBLOCK);
1.283 raeburn 1811: <td align="left">
1.281 albertel 1812: <script type="text/javascript">
1813: function changeNavDisplay () {
1814: var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
1815: ENDBLOCK
1816: foreach my $link (@linkorder) {
1817: $result.= "if (navchoice == '$link') {".
1818: $linkitems->{$link}{'cmd'}."}\n";
1819: }
1820: $result.='}
1821: </script>
1822: <form name="linkitems" method="post">
1.421 bisitz 1823: <span class="LC_nobreak"><select name="toplink">'."\n";
1.281 albertel 1824: foreach my $link (@linkorder) {
1825: if (defined($linkitems->{$link})) {
1826: if ($linkitems->{$link}{'text'} ne '') {
1827: $result .= ' <option value="'.$link.'">'.
1828: $linkitems->{$link}{'text'}."</option>\n";
1829: }
1830: }
1831: }
1832: $result .= '</select> <input type="button" name="chgnav"
1.446 ! raeburn 1833: value="Go" onclick="javascript:changeNavDisplay()" />
1.421 bisitz 1834: </span></form></td>'."\n";
1.298 albertel 1835:
1.281 albertel 1836: return $result;
1837: }
1838:
1.430 schulted 1839: sub show_linkitems_toolbar {
1840: my ($linkitems,$condition)=@_;
1.446 ! raeburn 1841: my @linkorder = ('firsthomework','everything','uncompleted',
! 1842: 'changefolder','clearbubbles');
! 1843: my $result .='<td align="left">'."\n".
! 1844: '<span class="LC_nobreak">'."\n".
! 1845: '<ul id="LC_toolbar">';
! 1846: foreach my $link (@linkorder) {
! 1847: my $link_id = 'LC_content_toolbar_'.$link;
! 1848: if (defined($linkitems->{$link})) {
! 1849: if ($linkitems->{$link}{'text'} ne '') {
! 1850: $linkitems->{$link}{'cmd'}=~s/"/'/g;
! 1851: if ($linkitems->{$link}{'cmd'}) {
! 1852: if ($link eq 'changefolder') {
! 1853: if ($condition) {
! 1854: $link_id='LC_content_toolbar_changefolder_toggled';
! 1855: } else {
! 1856: $link_id='LC_content_toolbar_changefolder';
! 1857: }
! 1858: }
! 1859: $result .= '<li><a href="#" '.
! 1860: 'onclick="'.$linkitems->{$link}{'cmd'}.'" '.
! 1861: 'id="'.$link_id.'" '.
! 1862: 'class="LC_toolbarItem" '.
! 1863: 'title="'.$linkitems->{$link}{'text'}.'">'.
! 1864: '</a></li>'."\n";
! 1865: }
! 1866: }
! 1867: }
1.430 schulted 1868: }
1.446 ! raeburn 1869: $result .= '</ul>'.
! 1870: '</span></td>'."\n";
1.430 schulted 1871: return $result;
1872: }
1873:
1874:
1.133 bowersj2 1875: 1;
1876:
1.418 jms 1877:
1878:
1879:
1880:
1881:
1882:
1883:
1884:
1.133 bowersj2 1885: package Apache::lonnavmaps::navmap;
1886:
1887: =pod
1888:
1.216 bowersj2 1889: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 1890:
1.217 bowersj2 1891: =head2 Overview
1.133 bowersj2 1892:
1.217 bowersj2 1893: The navmap object's job is to provide access to the resources
1894: in the course as Apache::lonnavmaps::resource objects, and to
1895: query and manage the relationship between those resource objects.
1896:
1897: Generally, you'll use the navmap object in one of three basic ways.
1898: In order of increasing complexity and power:
1899:
1900: =over 4
1901:
1.358 albertel 1902: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
1.217 bowersj2 1903: various ways to obtain resource objects, based on various identifiers.
1904: Use this when you want to request information about one object or
1905: a handful of resources you already know the identities of, from some
1906: other source. For more about Ids, Symbs, and MapPcs, see the
1907: Resource documentation. Note that Url should be a B<last resort>,
1.358 albertel 1908: not your first choice; it only really works when there is only one
1.217 bowersj2 1909: instance of the resource in the course, which only applies to
1.358 albertel 1910: maps, and even that may change in the future (see the B<getResourceByUrl>
1911: documentation for more details.)
1.217 bowersj2 1912:
1913: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
1914: retrieves resources matching some criterion and returns them
1915: in a flat array, with no structure information. Use this when
1916: you are manipulating a series of resources, based on what map
1917: the are in, but do not care about branching, or exactly how
1918: the maps and resources are related. This is the most common case.
1919:
1920: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
1921: the course's navmap in various ways without writing the traversal
1922: code yourself. See iterator documentation below. Use this when
1923: you need to know absolutely everything about the course, including
1924: branches and the precise relationship between maps and resources.
1925:
1926: =back
1927:
1928: =head2 Creation And Destruction
1929:
1930: To create a navmap object, use the following function:
1.133 bowersj2 1931:
1932: =over 4
1933:
1.221 bowersj2 1934: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 1935:
1.221 bowersj2 1936: Creates a new navmap object. Returns the navmap object if this is
1937: successful, or B<undef> if not.
1.174 albertel 1938:
1.216 bowersj2 1939: =back
1940:
1941: =head2 Methods
1942:
1943: =over 4
1944:
1.174 albertel 1945: =item * B<getIterator>(first, finish, filter, condition):
1946:
1947: See iterator documentation below.
1.133 bowersj2 1948:
1949: =cut
1950:
1951: use strict;
1952: use GDBM_File;
1.320 albertel 1953: use Apache::lonnet;
1.397 albertel 1954: use LONCAPA;
1.133 bowersj2 1955:
1956: sub new {
1957: # magic invocation to create a class instance
1958: my $proto = shift;
1959: my $class = ref($proto) || $proto;
1960: my $self = {};
1961:
1962: # Resource cache stores navmap resources as we reference them. We generate
1963: # them on-demand so we don't pay for creating resources unless we use them.
1964: $self->{RESOURCE_CACHE} = {};
1965:
1966: # Network failure flag, if we accessed the course or user opt and
1967: # failed
1968: $self->{NETWORK_FAILURE} = 0;
1969:
1970: # tie the nav hash
1971:
1.168 bowersj2 1972: my %navmaphash;
1973: my %parmhash;
1.320 albertel 1974: my $courseFn = $env{"request.course.fn"};
1.220 bowersj2 1975: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
1.133 bowersj2 1976: &GDBM_READER(), 0640))) {
1977: return undef;
1978: }
1979:
1.220 bowersj2 1980: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
1.133 bowersj2 1981: &GDBM_READER(), 0640)))
1982: {
1.170 matthew 1983: untie %{$self->{PARM_HASH}};
1.133 bowersj2 1984: return undef;
1985: }
1986:
1.199 bowersj2 1987: $self->{NAV_HASH} = \%navmaphash;
1.168 bowersj2 1988: $self->{PARM_HASH} = \%parmhash;
1.221 bowersj2 1989: $self->{PARM_CACHE} = {};
1.133 bowersj2 1990:
1991: bless($self);
1992:
1993: return $self;
1994: }
1995:
1.221 bowersj2 1996: sub generate_course_user_opt {
1.133 bowersj2 1997: my $self = shift;
1.221 bowersj2 1998: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 1999:
1.320 albertel 2000: my $uname=$env{'user.name'};
2001: my $udom=$env{'user.domain'};
2002: my $cid=$env{'request.course.id'};
1.326 albertel 2003: my $cdom=$env{'course.'.$cid.'.domain'};
2004: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2005:
1.133 bowersj2 2006: # ------------------------------------------------- Get coursedata (if present)
1.326 albertel 2007: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2008: # Check for network failure
2009: if (!ref($courseopt)) {
2010: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
1.324 albertel 2011: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2012: }
1.326 albertel 2013: undef($courseopt);
2014: }
1.325 albertel 2015:
1.133 bowersj2 2016: # --------------------------------------------------- Get userdata (if present)
1.325 albertel 2017:
1.326 albertel 2018: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2019: # Check for network failure
2020: if (!ref($useropt)) {
2021: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
1.324 albertel 2022: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2023: }
1.326 albertel 2024: undef($useropt);
1.221 bowersj2 2025: }
2026:
1.326 albertel 2027: $self->{COURSE_OPT} = $courseopt;
2028: $self->{USER_OPT} = $useropt;
2029:
1.221 bowersj2 2030: $self->{COURSE_USER_OPT_GENERATED} = 1;
2031:
2032: return;
2033: }
2034:
2035: sub generate_email_discuss_status {
2036: my $self = shift;
1.259 raeburn 2037: my $symb = shift;
1.221 bowersj2 2038: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 2039:
1.320 albertel 2040: my $cid=$env{'request.course.id'};
1.326 albertel 2041: my $cdom=$env{'course.'.$cid.'.domain'};
2042: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2043:
2044: my %emailstatus = &Apache::lonnet::dump('email_status');
2045: my $logoutTime = $emailstatus{'logout'};
1.320 albertel 2046: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
1.221 bowersj2 2047: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2048: $courseLeaveTime : $logoutTime);
2049: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2050: $cdom, $cnum);
1.259 raeburn 2051: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
1.320 albertel 2052: $env{'user.domain'},$env{'user.name'},'lastread');
1.259 raeburn 2053: my %lastreadtime = ();
1.394 raeburn 2054: foreach my $key (keys %lastread) {
2055: my $shortkey = $key;
2056: $shortkey =~ s/_lastread$//;
2057: $lastreadtime{$shortkey} = $lastread{$key};
1.259 raeburn 2058: }
2059:
1.221 bowersj2 2060: my %feedback=();
2061: my %error=();
1.325 albertel 2062: my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},
2063: $env{'user.name'});
1.221 bowersj2 2064:
1.325 albertel 2065: foreach my $msgid (@keys) {
1.295 albertel 2066: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
1.395 raeburn 2067: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
2068: $symb,$error) = &Apache::lonmsg::unpackmsgid($msgid);
1.396 raeburn 2069: &Apache::lonenc::check_decrypt(\$symb);
2070: if (($fromcid ne '') && ($fromcid ne $cid)) {
2071: next;
2072: }
1.395 raeburn 2073: if (defined($symb)) {
2074: if (defined($error) && $error == 1) {
2075: $error{$symb}.=','.$msgid;
2076: } else {
2077: $feedback{$symb}.=','.$msgid;
2078: }
2079: } else {
2080: my $plain=
2081: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
2082: if ($plain=~/ \[([^\]]+)\]\:/) {
2083: my $url=$1;
2084: if ($plain=~/\:Error \[/) {
2085: $error{$url}.=','.$msgid;
2086: } else {
2087: $feedback{$url}.=','.$msgid;
2088: }
2089: }
2090: }
1.221 bowersj2 2091: }
1.211 bowersj2 2092: }
1.221 bowersj2 2093:
1.395 raeburn 2094: #symbs of resources that have feedbacks (will be urls pre-2.3)
1.221 bowersj2 2095: $self->{FEEDBACK} = \%feedback;
1.395 raeburn 2096: #or errors (will be urls pre 2.3)
1.295 albertel 2097: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 2098: $self->{DISCUSSION_TIME} = \%discussiontime;
2099: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 2100: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 2101:
2102: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2103: }
2104:
2105: sub get_user_data {
2106: my $self = shift;
2107: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 2108:
1.221 bowersj2 2109: # Retrieve performance data on problems
1.320 albertel 2110: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
2111: $env{'user.domain'},
2112: $env{'user.name'});
1.221 bowersj2 2113: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 2114:
1.221 bowersj2 2115: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 2116: }
2117:
1.354 raeburn 2118: sub get_discussion_data {
2119: my $self = shift;
2120: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
1.366 albertel 2121: return $self->{DISCUSSION_DATA};
1.354 raeburn 2122: }
1.366 albertel 2123:
2124: $self->generate_email_discuss_status();
2125:
1.354 raeburn 2126: my $cid=$env{'request.course.id'};
2127: my $cdom=$env{'course.'.$cid.'.domain'};
2128: my $cnum=$env{'course.'.$cid.'.num'};
2129: # Retrieve discussion data for resources in course
1.367 albertel 2130: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
1.366 albertel 2131:
2132:
1.354 raeburn 2133: $self->{DISCUSSION_DATA} = \%discussion_data;
2134: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2135: return $self->{DISCUSSION_DATA};
2136: }
2137:
2138:
1.133 bowersj2 2139: # Internal function: Takes a key to look up in the nav hash and implements internal
2140: # memory caching of that key.
2141: sub navhash {
2142: my $self = shift; my $key = shift;
2143: return $self->{NAV_HASH}->{$key};
2144: }
2145:
1.217 bowersj2 2146: =pod
2147:
2148: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2149: false otherwise. Undefined course maps indicate an error somewhere in
2150: LON-CAPA, and you will not be able to proceed with using the navmap.
2151: See the B<NAV> screen for an example of using this.
2152:
2153: =cut
2154:
1.133 bowersj2 2155: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2156: sub courseMapDefined {
2157: my $self = shift;
1.320 albertel 2158: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
1.133 bowersj2 2159:
2160: my $firstres = $self->navhash("map_start_$uri");
2161: my $lastres = $self->navhash("map_finish_$uri");
2162: return $firstres && $lastres;
2163: }
2164:
2165: sub getIterator {
2166: my $self = shift;
2167: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.314 albertel 2168: shift, undef, shift,
2169: shift, shift);
1.133 bowersj2 2170: return $iterator;
2171: }
2172:
2173: # Private method: Does the given resource (as a symb string) have
2174: # current discussion? Returns 0 if chat/mail data not extracted.
2175: sub hasDiscussion {
2176: my $self = shift;
2177: my $symb = shift;
1.221 bowersj2 2178: $self->generate_email_discuss_status();
2179:
1.133 bowersj2 2180: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2181:
2182: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2183:
1.323 albertel 2184: # backward compatibility (bulletin boards used to be 'wrapped')
2185: my $ressymb = $self->wrap_symb($symb);
1.259 raeburn 2186: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2187: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2188: } else {
1.266 raeburn 2189: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2190: 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 2191: }
1.133 bowersj2 2192: }
2193:
1.366 albertel 2194: sub last_post_time {
2195: my $self = shift;
2196: my $symb = shift;
2197: my $ressymb = $self->wrap_symb($symb);
2198: return $self->{DISCUSSION_TIME}->{$ressymb};
2199: }
2200:
1.393 raeburn 2201: sub discussion_info {
1.366 albertel 2202: my $self = shift;
2203: my $symb = shift;
1.393 raeburn 2204: my $filter = shift;
1.366 albertel 2205:
2206: $self->get_discussion_data();
1.372 raeburn 2207:
1.366 albertel 2208: my $ressymb = $self->wrap_symb($symb);
1.372 raeburn 2209: # keys used to store bulletinboard postings use 'unwrapped' symb.
1.397 albertel 2210: my $discsymb = &escape($self->unwrap_symb($ressymb));
1.372 raeburn 2211: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
1.366 albertel 2212: if (!$version) { return; }
2213:
2214: my $prevread = $self->{LAST_READ}{$ressymb};
2215:
1.393 raeburn 2216: my $count = 0;
1.366 albertel 2217: my $hiddenflag = 0;
2218: my $deletedflag = 0;
1.393 raeburn 2219: my ($hidden,$deleted,%info);
1.366 albertel 2220:
2221: for (my $id=$version; $id>0; $id--) {
1.372 raeburn 2222: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
1.366 albertel 2223: my @keys=split(/:/,$vkeys);
2224: if (grep(/^hidden$/ ,@keys)) {
2225: if (!$hiddenflag) {
1.372 raeburn 2226: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
1.366 albertel 2227: $hiddenflag = 1;
2228: }
2229: } elsif (grep(/^deleted$/,@keys)) {
2230: if (!$deletedflag) {
1.372 raeburn 2231: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
1.366 albertel 2232: $deletedflag = 1;
2233: }
2234: } else {
1.393 raeburn 2235: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2236: if ($filter eq 'unread') {
2237: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2238: next;
2239: }
2240: }
2241: $count++;
2242: $info{$count}{'subject'} =
2243: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2244: $info{$count}{'id'} = $id;
2245: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2246: }
1.366 albertel 2247: }
2248: }
2249: if (wantarray) {
1.393 raeburn 2250: return ($count,%info);
1.366 albertel 2251: }
1.393 raeburn 2252: return $count;
1.366 albertel 2253: }
2254:
1.321 raeburn 2255: sub wrap_symb {
1.322 albertel 2256: my $self = shift;
1.321 raeburn 2257: my $symb = shift;
1.373 albertel 2258: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
1.322 albertel 2259: unless ($symb =~ m|adm/wrapper/adm|) {
2260: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
1.321 raeburn 2261: }
2262: }
1.322 albertel 2263: return $symb;
1.321 raeburn 2264: }
2265:
1.372 raeburn 2266: sub unwrap_symb {
2267: my $self = shift;
2268: my $ressymb = shift;
2269: my $discsymb = $ressymb;
1.373 albertel 2270: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
1.372 raeburn 2271: $discsymb = $1.$2;
2272: }
2273: return $discsymb;
2274: }
2275:
1.322 albertel 2276: # Private method: Does the given resource (as a symb string) have
2277: # current feedback? Returns the string in the feedback hash, which
2278: # will be false if it does not exist.
2279:
1.133 bowersj2 2280: sub getFeedback {
2281: my $self = shift;
2282: my $symb = shift;
1.395 raeburn 2283: my $source = shift;
1.133 bowersj2 2284:
1.221 bowersj2 2285: $self->generate_email_discuss_status();
2286:
1.133 bowersj2 2287: if (!defined($self->{FEEDBACK})) { return ""; }
2288:
1.395 raeburn 2289: my $feedback;
2290: if ($self->{FEEDBACK}->{$symb}) {
2291: $feedback = $self->{FEEDBACK}->{$symb};
2292: if ($self->{FEEDBACK}->{$source}) {
2293: $feedback .= ','.$self->{FEEDBACK}->{$source};
2294: }
2295: } else {
2296: if ($self->{FEEDBACK}->{$source}) {
2297: $feedback = $self->{FEEDBACK}->{$source};
2298: }
2299: }
2300: return $feedback;
1.133 bowersj2 2301: }
2302:
2303: # Private method: Get the errors for that resource (by source).
2304: sub getErrors {
2305: my $self = shift;
1.395 raeburn 2306: my $symb = shift;
1.133 bowersj2 2307: my $src = shift;
1.221 bowersj2 2308:
2309: $self->generate_email_discuss_status();
2310:
1.133 bowersj2 2311: if (!defined($self->{ERROR_MSG})) { return ""; }
1.395 raeburn 2312:
2313: my $errors;
2314: if ($self->{ERROR_MSG}->{$symb}) {
2315: $errors = $self->{ERROR_MSG}->{$symb};
2316: if ($self->{ERROR_MSG}->{$src}) {
2317: $errors .= ','.$self->{ERROR_MSG}->{$src};
2318: }
2319: } else {
2320: if ($self->{ERROR_MSG}->{$src}) {
2321: $errors = $self->{ERROR_MSG}->{$src};
2322: }
2323: }
2324: return $errors;
1.133 bowersj2 2325: }
2326:
2327: =pod
2328:
1.174 albertel 2329: =item * B<getById>(id):
2330:
2331: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2332: object for that resource. This method, or other methods that use it
2333: (as in the resource object) is the only proper way to obtain a
2334: resource object.
1.133 bowersj2 2335:
1.194 bowersj2 2336: =item * B<getBySymb>(symb):
2337:
2338: Based on the symb of the resource, get a resource object for that
2339: resource. This is one of the proper ways to get a resource object.
2340:
2341: =item * B<getMapByMapPc>(map_pc):
2342:
2343: Based on the map_pc of the resource, get a resource object for
2344: the given map. This is one of the proper ways to get a resource object.
2345:
1.133 bowersj2 2346: =cut
2347:
2348: # The strategy here is to cache the resource objects, and only construct them
2349: # as we use them. The real point is to prevent reading any more from the tied
1.398 banghart 2350: # hash than we have to, which should hopefully alleviate speed problems.
1.133 bowersj2 2351:
2352: sub getById {
2353: my $self = shift;
2354: my $id = shift;
2355:
2356: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2357: {
2358: return $self->{RESOURCE_CACHE}->{$id};
2359: }
2360:
2361: # resource handles inserting itself into cache.
2362: # Not clear why the quotes are necessary, but as of this
2363: # writing it doesn't work without them.
2364: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2365: }
1.133 bowersj2 2366:
1.172 bowersj2 2367: sub getBySymb {
2368: my $self = shift;
2369: my $symb = shift;
1.277 matthew 2370:
1.228 albertel 2371: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2372: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2373: my $returnvalue = undef;
2374: if (ref($map)) {
2375: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2376: }
2377: return $returnvalue;
1.194 bowersj2 2378: }
2379:
2380: sub getByMapPc {
2381: my $self = shift;
2382: my $map_pc = shift;
2383: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2384: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2385: return $self->getById($map_id);
1.172 bowersj2 2386: }
2387:
1.133 bowersj2 2388: =pod
2389:
1.174 albertel 2390: =item * B<firstResource>():
2391:
2392: Returns a resource object reference corresponding to the first
2393: resource in the navmap.
1.133 bowersj2 2394:
2395: =cut
2396:
2397: sub firstResource {
2398: my $self = shift;
2399: my $firstResource = $self->navhash('map_start_' .
1.320 albertel 2400: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2401: return $self->getById($firstResource);
1.132 bowersj2 2402: }
1.133 bowersj2 2403:
2404: =pod
2405:
1.174 albertel 2406: =item * B<finishResource>():
2407:
2408: Returns a resource object reference corresponding to the last resource
2409: in the navmap.
1.133 bowersj2 2410:
2411: =cut
2412:
2413: sub finishResource {
2414: my $self = shift;
2415: my $firstResource = $self->navhash('map_finish_' .
1.320 albertel 2416: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2417: return $self->getById($firstResource);
1.132 bowersj2 2418: }
1.133 bowersj2 2419:
2420: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2421: # the actual lookup; parmval caches the results.
2422: sub parmval {
2423: my $self = shift;
1.399 albertel 2424: my ($what,$symb,$recurse)=@_;
1.133 bowersj2 2425: my $hashkey = $what."|||".$symb;
2426:
2427: if (defined($self->{PARM_CACHE}->{$hashkey})) {
1.411 raeburn 2428: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
2429: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
2430: if (wantarray) {
2431: return @{$self->{PARM_CACHE}->{$hashkey}};
2432: } else {
2433: return $self->{PARM_CACHE}->{$hashkey}->[0];
2434: }
2435: }
2436: } else {
2437: return $self->{PARM_CACHE}->{$hashkey};
2438: }
1.133 bowersj2 2439: }
1.399 albertel 2440: my $result = $self->parmval_real($what, $symb, $recurse);
1.133 bowersj2 2441: $self->{PARM_CACHE}->{$hashkey} = $result;
1.405 albertel 2442: if (wantarray) {
1.411 raeburn 2443: return @{$result};
1.405 albertel 2444: }
2445: return $result->[0];
1.132 bowersj2 2446: }
2447:
1.133 bowersj2 2448: sub parmval_real {
2449: my $self = shift;
1.219 albertel 2450: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2451:
1.221 bowersj2 2452: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2453: $self->generate_course_user_opt();
2454:
1.320 albertel 2455: my $cid=$env{'request.course.id'};
2456: my $csec=$env{'request.course.sec'};
1.350 raeburn 2457: my $cgroup='';
2458: my @cgrps=split(/:/,$env{'request.course.groups'});
2459: if (@cgrps > 0) {
2460: @cgrps = sort(@cgrps);
2461: $cgroup = $cgrps[0];
2462: }
1.320 albertel 2463: my $uname=$env{'user.name'};
2464: my $udom=$env{'user.domain'};
1.133 bowersj2 2465:
1.405 albertel 2466: unless ($symb) { return ['']; }
1.133 bowersj2 2467: my $result='';
2468:
1.226 www 2469: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.383 albertel 2470: $mapname = &Apache::lonnet::deversion($mapname);
1.133 bowersj2 2471: # ----------------------------------------------------- Cascading lookup scheme
2472: my $rwhat=$what;
2473: $what=~s/^parameter\_//;
2474: $what=~s/\_/\./;
2475:
2476: my $symbparm=$symb.'.'.$what;
2477: my $mapparm=$mapname.'___(all).'.$what;
1.325 albertel 2478: my $usercourseprefix=$cid;
1.133 bowersj2 2479:
1.350 raeburn 2480: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2481: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
2482: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2483:
1.133 bowersj2 2484: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2485: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2486: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2487:
2488: my $courselevel= $usercourseprefix.'.'.$what;
2489: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2490: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2491:
2492: my $useropt = $self->{USER_OPT};
2493: my $courseopt = $self->{COURSE_OPT};
2494: my $parmhash = $self->{PARM_HASH};
2495:
2496: # ---------------------------------------------------------- first, check user
2497: if ($uname and defined($useropt)) {
1.405 albertel 2498: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2499: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
2500: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
1.133 bowersj2 2501: }
2502:
2503: # ------------------------------------------------------- second, check course
1.350 raeburn 2504: if ($cgroup ne '' and defined($courseopt)) {
1.405 albertel 2505: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2506: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
2507: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
1.350 raeburn 2508: }
2509:
1.133 bowersj2 2510: if ($csec and defined($courseopt)) {
1.405 albertel 2511: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2512: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
2513: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
1.133 bowersj2 2514: }
2515:
2516: if (defined($courseopt)) {
1.405 albertel 2517: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
1.133 bowersj2 2518: }
2519:
2520: # ----------------------------------------------------- third, check map parms
2521:
2522: my $thisparm=$$parmhash{$symbparm};
1.405 albertel 2523: if (defined($thisparm)) { return [$thisparm,'map']; }
1.133 bowersj2 2524:
2525: # ----------------------------------------------------- fourth , check default
2526:
1.246 albertel 2527: my $meta_rwhat=$rwhat;
2528: $meta_rwhat=~s/\./_/g;
2529: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
1.405 albertel 2530: if (defined($default)) { return [$default,'resource']}
1.246 albertel 2531: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.405 albertel 2532: if (defined($default)) { return [$default,'resource']}
1.315 albertel 2533: # --------------------------------------------------- fifth, check more course
2534: if (defined($courseopt)) {
1.405 albertel 2535: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
2536: if (defined($$courseopt{$courselevel})) {
2537: my $ret = [$$courseopt{$courselevel},'course'];
2538: return $ret;
2539: }
1.315 albertel 2540: }
2541: # --------------------------------------------------- sixth , cascade up parts
1.133 bowersj2 2542:
2543: my ($space,@qualifier)=split(/\./,$rwhat);
2544: my $qualifier=join('.',@qualifier);
2545: unless ($space eq '0') {
1.160 albertel 2546: my @parts=split(/_/,$space);
2547: my $id=pop(@parts);
2548: my $part=join('_',@parts);
2549: if ($part eq '') { $part='0'; }
1.405 albertel 2550: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2551: if (defined($partgeneral[0])) { return \@partgeneral; }
1.133 bowersj2 2552: }
1.405 albertel 2553: if ($recurse) { return []; }
1.399 albertel 2554: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
1.405 albertel 2555: if (defined($pack_def)) { return [$pack_def,'resource']; }
2556: return [''];
1.145 bowersj2 2557: }
2558:
1.174 albertel 2559: =pod
1.145 bowersj2 2560:
1.352 raeburn 2561: =item * B<getResourceByUrl>(url,multiple):
1.145 bowersj2 2562:
1.352 raeburn 2563: Retrieves a resource object by URL of the resource, unless the optional
1.398 banghart 2564: multiple parameter is included in which case an array of resource
1.352 raeburn 2565: objects is returned. If passed a resource object, it will simply return
2566: it, so it is safe to use this method in code like
2567: "$res = $navmap->getResourceByUrl($res)"
2568: if you're not sure if $res is already an object, or just a URL. If the
2569: resource appears multiple times in the course, only the first instance
2570: will be returned (useful for maps), unless the multiple parameter has
2571: been included, in which case all instances are returned in an array.
1.174 albertel 2572:
1.314 albertel 2573: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall):
1.174 albertel 2574:
2575: The map is a specification of a map to retreive the resources from,
2576: either as a url or as an object. The filterFunc is a reference to a
2577: function that takes a resource object as its one argument and returns
2578: true if the resource should be included, or false if it should not
2579: be. If recursive is true, the map will be recursively examined,
2580: otherwise it will not be. If bailout is true, the function will return
1.314 albertel 2581: as soon as it finds a resource, if false it will finish. If showall is
2582: true it will not hide maps that contain nothing but one other map. By
2583: default, the map is the top-level map of the course, filterFunc is a
2584: function that always returns 1, recursive is true, bailout is false,
2585: showall is false. The resources will be returned in a list containing
2586: the resource objects for the corresponding resources, with B<no
2587: structure information> in the list; regardless of branching,
2588: recursion, etc., it will be a flat list.
1.174 albertel 2589:
2590: Thus, this is suitable for cases where you don't want the structure,
2591: just a list of all resources. It is also suitable for finding out how
2592: many resources match a given description; for this use, if all you
2593: want to know is if I<any> resources match the description, the bailout
2594: parameter will allow you to avoid potentially expensive enumeration of
2595: all matching resources.
1.145 bowersj2 2596:
1.318 albertel 2597: =item * B<hasResource>(map, filterFunc, recursive, showall):
1.145 bowersj2 2598:
1.398 banghart 2599: Convenience method for
1.146 bowersj2 2600:
1.318 albertel 2601: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
1.146 bowersj2 2602:
1.174 albertel 2603: which will tell whether the map has resources matching the description
2604: in the filter function.
1.146 bowersj2 2605:
1.352 raeburn 2606: =item * B<usedVersion>(url):
2607:
2608: Retrieves version infomation for a url. Returns the version (a number, or
2609: the string "mostrecent") for resources which have version information in
2610: the big hash.
2611:
1.145 bowersj2 2612: =cut
2613:
1.277 matthew 2614:
1.145 bowersj2 2615: sub getResourceByUrl {
2616: my $self = shift;
2617: my $resUrl = shift;
1.352 raeburn 2618: my $multiple = shift;
1.145 bowersj2 2619:
2620: if (ref($resUrl)) { return $resUrl; }
2621:
2622: $resUrl = &Apache::lonnet::clutter($resUrl);
2623: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
1.352 raeburn 2624: if (!$resId) { return ''; }
2625: if ($multiple) {
2626: my @resources = ();
2627: my @resIds = split (/,/, $resId);
2628: foreach my $id (@resIds) {
1.353 raeburn 2629: my $resourceId = $self->getById($id);
2630: if ($resourceId) {
2631: push(@resources,$resourceId);
1.352 raeburn 2632: }
2633: }
2634: return @resources;
2635: } else {
2636: if ($resId =~ /,/) {
2637: $resId = (split (/,/, $resId))[0];
2638: }
2639: return $self->getById($resId);
1.145 bowersj2 2640: }
2641: }
2642:
2643: sub retrieveResources {
2644: my $self = shift;
2645: my $map = shift;
2646: my $filterFunc = shift;
2647: if (!defined ($filterFunc)) {
2648: $filterFunc = sub {return 1;};
2649: }
2650: my $recursive = shift;
2651: if (!defined($recursive)) { $recursive = 1; }
2652: my $bailout = shift;
2653: if (!defined($bailout)) { $bailout = 0; }
1.314 albertel 2654: my $showall = shift;
1.145 bowersj2 2655: # Create the necessary iterator.
2656: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 2657: $map = $self->getResourceByUrl($map);
1.145 bowersj2 2658: }
2659:
1.213 bowersj2 2660: # If nothing was passed, assume top-level map
2661: if (!$map) {
2662: $map = $self->getById('0.0');
2663: }
2664:
1.145 bowersj2 2665: # Check the map's validity.
1.213 bowersj2 2666: if (!$map->is_map()) {
1.145 bowersj2 2667: # Oh, to throw an exception.... how I'd love that!
2668: return ();
2669: }
2670:
1.146 bowersj2 2671: # Get an iterator.
2672: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.314 albertel 2673: undef, $recursive, $showall);
1.146 bowersj2 2674:
2675: my @resources = ();
2676:
1.400 albertel 2677: if (&$filterFunc($map)) {
2678: push(@resources, $map);
2679: }
2680:
1.146 bowersj2 2681: # Run down the iterator and collect the resources.
1.222 bowersj2 2682: my $curRes;
2683:
2684: while ($curRes = $it->next()) {
1.146 bowersj2 2685: if (ref($curRes)) {
2686: if (!&$filterFunc($curRes)) {
2687: next;
2688: }
2689:
1.400 albertel 2690: push(@resources, $curRes);
1.146 bowersj2 2691:
2692: if ($bailout) {
2693: return @resources;
2694: }
2695: }
2696:
2697: }
2698:
2699: return @resources;
2700: }
2701:
2702: sub hasResource {
2703: my $self = shift;
2704: my $map = shift;
2705: my $filterFunc = shift;
2706: my $recursive = shift;
1.318 albertel 2707: my $showall = shift;
1.146 bowersj2 2708:
1.318 albertel 2709: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
1.133 bowersj2 2710: }
1.51 bowersj2 2711:
1.352 raeburn 2712: sub usedVersion {
2713: my $self = shift;
2714: my $linkurl = shift;
2715: return $self->navhash("version_$linkurl");
2716: }
2717:
1.51 bowersj2 2718: 1;
2719:
2720: package Apache::lonnavmaps::iterator;
1.365 albertel 2721: use Scalar::Util qw(weaken);
1.320 albertel 2722: use Apache::lonnet;
2723:
1.51 bowersj2 2724: =pod
2725:
2726: =back
2727:
1.174 albertel 2728: =head1 Object: navmap Iterator
1.51 bowersj2 2729:
1.174 albertel 2730: An I<iterator> encapsulates the logic required to traverse a data
2731: structure. navmap uses an iterator to traverse the course map
2732: according to the criteria you wish to use.
2733:
2734: To obtain an iterator, call the B<getIterator>() function of a
2735: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
2736: directly.) This will return a reference to the iterator:
1.51 bowersj2 2737:
2738: C<my $resourceIterator = $navmap-E<gt>getIterator();>
2739:
2740: To get the next thing from the iterator, call B<next>:
2741:
2742: C<my $nextThing = $resourceIterator-E<gt>next()>
2743:
2744: getIterator behaves as follows:
2745:
2746: =over 4
2747:
1.174 albertel 2748: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
2749:
2750: All parameters are optional. firstResource is a resource reference
2751: corresponding to where the iterator should start. It defaults to
2752: navmap->firstResource() for the corresponding nav map. finishResource
2753: corresponds to where you want the iterator to end, defaulting to
2754: navmap->finishResource(). filterHash is a hash used as a set
2755: containing strings representing the resource IDs, defaulting to
2756: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 2757: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 2758: recursed on. If it is a 1, only resources NOT in the filterHash will
2759: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
2760: false (default), the iterator will only return the first level of map
2761: that is not just a single, 'redirecting' map. If true, the iterator
2762: will return all information, starting with the top-level map,
2763: regardless of content. returnTopMap, if true (default false), will
2764: cause the iterator to return the top-level map object (resource 0.0)
2765: before anything else.
2766:
2767: Thus, by default, only top-level resources will be shown. Change the
2768: condition to a 1 without changing the hash, and all resources will be
2769: shown. Changing the condition to 1 and including some values in the
2770: hash will allow you to selectively suppress parts of the navmap, while
2771: leaving it on 0 and adding things to the hash will allow you to
2772: selectively add parts of the nav map. See the handler code for
2773: examples.
2774:
2775: The iterator will return either a reference to a resource object, or a
2776: token representing something in the map, such as the beginning of a
2777: new branch. The possible tokens are:
2778:
2779: =over 4
1.51 bowersj2 2780:
1.222 bowersj2 2781: =item * B<END_ITERATOR>:
2782:
2783: The iterator has returned all that it's going to. Further calls to the
2784: iterator will just produce more of these. This is a "false" value, and
2785: is the only false value the iterator which will be returned, so it can
2786: be used as a loop sentinel.
2787:
1.217 bowersj2 2788: =item * B<BEGIN_MAP>:
1.51 bowersj2 2789:
1.174 albertel 2790: A new map is being recursed into. This is returned I<after> the map
2791: resource itself is returned.
1.51 bowersj2 2792:
1.217 bowersj2 2793: =item * B<END_MAP>:
1.174 albertel 2794:
2795: The map is now done.
1.51 bowersj2 2796:
1.217 bowersj2 2797: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 2798:
1.174 albertel 2799: A branch is now starting. The next resource returned will be the first
2800: in that branch.
1.70 bowersj2 2801:
1.217 bowersj2 2802: =item * B<END_BRANCH>:
1.70 bowersj2 2803:
1.174 albertel 2804: The branch is now done.
1.51 bowersj2 2805:
2806: =back
2807:
1.174 albertel 2808: The tokens are retreivable via methods on the iterator object, i.e.,
2809: $iterator->END_MAP.
1.70 bowersj2 2810:
1.174 albertel 2811: Maps can contain empty resources. The iterator will automatically skip
2812: over such resources, but will still treat the structure
2813: correctly. Thus, a complicated map with several branches, but
2814: consisting entirely of empty resources except for one beginning or
2815: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
2816: but only one resource will be returned.
1.116 bowersj2 2817:
1.242 matthew 2818: =back
2819:
1.222 bowersj2 2820: =head2 Normal Usage
2821:
2822: Normal usage of the iterator object is to do the following:
2823:
2824: my $it = $navmap->getIterator([your params here]);
2825: my $curRes;
2826: while ($curRes = $it->next()) {
2827: [your logic here]
2828: }
2829:
2830: Note that inside of the loop, it's frequently useful to check if
2831: "$curRes" is a reference or not with the reference function; only
2832: resource objects will be references, and any non-references will
2833: be the tokens described above.
2834:
2835: Also note there is some old code floating around that trys to track
2836: the depth of the iterator to see when it's done; do not copy that
1.398 banghart 2837: code. It is difficult to get right and harder to understand than
1.222 bowersj2 2838: this. They should be migrated to this new style.
1.51 bowersj2 2839:
2840: =cut
2841:
2842: # Here are the tokens for the iterator:
2843:
1.222 bowersj2 2844: sub END_ITERATOR { return 0; }
1.51 bowersj2 2845: sub BEGIN_MAP { return 1; } # begining of a new map
2846: sub END_MAP { return 2; } # end of the map
2847: sub BEGIN_BRANCH { return 3; } # beginning of a branch
2848: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 2849: sub FORWARD { return 1; } # go forward
2850: sub BACKWARD { return 2; }
1.51 bowersj2 2851:
1.96 bowersj2 2852: sub min {
2853: (my $a, my $b) = @_;
2854: if ($a < $b) { return $a; } else { return $b; }
2855: }
2856:
1.94 bowersj2 2857: sub new {
2858: # magic invocation to create a class instance
2859: my $proto = shift;
2860: my $class = ref($proto) || $proto;
2861: my $self = {};
2862:
1.300 albertel 2863: weaken($self->{NAV_MAP} = shift);
1.94 bowersj2 2864: return undef unless ($self->{NAV_MAP});
2865:
2866: # Handle the parameters
2867: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
2868: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
2869:
2870: # If the given resources are just the ID of the resource, get the
2871: # objects
2872: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
2873: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
2874: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
2875: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
2876:
2877: $self->{FILTER} = shift;
2878:
2879: # A hash, used as a set, of resource already seen
2880: $self->{ALREADY_SEEN} = shift;
2881: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
2882: $self->{CONDITION} = shift;
2883:
1.116 bowersj2 2884: # Do we want to automatically follow "redirection" maps?
2885: $self->{FORCE_TOP} = shift;
2886:
1.162 bowersj2 2887: # Do we want to return the top-level map object (resource 0.0)?
2888: $self->{RETURN_0} = shift;
2889: # have we done that yet?
2890: $self->{HAVE_RETURNED_0} = 0;
2891:
1.94 bowersj2 2892: # Now, we need to pre-process the map, by walking forward and backward
2893: # over the parts of the map we're going to look at.
1.96 bowersj2 2894:
1.97 bowersj2 2895: # The processing steps are exactly the same, except for a few small
2896: # changes, so I bundle those up in the following list of two elements:
2897: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
2898: # first_resource).
2899: # This prevents writing nearly-identical code twice.
2900: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
2901: 'FIRST_RESOURCE'],
2902: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
2903: 'FINISH_RESOURCE'] );
2904:
1.98 bowersj2 2905: my $maxDepth = 0; # tracks max depth
2906:
1.116 bowersj2 2907: # If there is only one resource in this map, and it's a map, we
2908: # want to remember that, so the user can ask for the first map
2909: # that isn't just a redirector.
2910: my $resource; my $resourceCount = 0;
2911:
1.209 bowersj2 2912: # Documentation on this algorithm can be found in the CVS repository at
2913: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
2914: # in that file.
1.107 bowersj2 2915: # **1**
2916:
1.97 bowersj2 2917: foreach my $pass (@iterations) {
2918: my $direction = $pass->[0];
2919: my $valName = $pass->[1];
2920: my $nextResourceMethod = $pass->[2];
2921: my $firstResourceName = $pass->[3];
2922:
2923: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
2924: $self->{FIRST_RESOURCE},
2925: $self->{FINISH_RESOURCE},
2926: {}, undef, 0, $direction);
1.96 bowersj2 2927:
1.97 bowersj2 2928: # prime the recursion
2929: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 2930: $iterator->next();
1.97 bowersj2 2931: my $curRes = $iterator->next();
1.222 bowersj2 2932: my $depth = 1;
2933: while ($depth > 0) {
2934: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
2935: if ($curRes == $iterator->END_MAP()) { $depth--; }
2936:
1.97 bowersj2 2937: if (ref($curRes)) {
1.116 bowersj2 2938: # If there's only one resource, this will save it
1.117 bowersj2 2939: # we have to filter empty resources from consideration here,
2940: # or even "empty", redirecting maps have two (start & finish)
2941: # or three (start, finish, plus redirector)
2942: if($direction == FORWARD && $curRes->src()) {
2943: $resource = $curRes; $resourceCount++;
2944: }
1.97 bowersj2 2945: my $resultingVal = $curRes->{DATA}->{$valName};
2946: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 2947: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 2948:
1.116 bowersj2 2949: if ($nextCount == 1) { # **3**
1.97 bowersj2 2950: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
2951: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
2952: }
2953:
1.116 bowersj2 2954: if ($nextCount > 1) { # **4**
1.97 bowersj2 2955: foreach my $res (@{$nextResources}) {
2956: my $current = $res->{DATA}->{$valName} || 999999999;
2957: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
2958: }
2959: }
2960: }
1.96 bowersj2 2961:
1.107 bowersj2 2962: # Assign the final val (**2**)
1.97 bowersj2 2963: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 2964: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
2965: $curRes->{DATA}->{BOT_UP_VAL});
2966:
2967: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
2968: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 2969: }
1.222 bowersj2 2970:
2971: $curRes = $iterator->next();
1.96 bowersj2 2972: }
2973: }
1.94 bowersj2 2974:
1.116 bowersj2 2975: # Check: Was this only one resource, a map?
1.255 albertel 2976: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 2977: my $firstResource = $resource->map_start();
2978: my $finishResource = $resource->map_finish();
2979: return
2980: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
2981: $finishResource, $self->{FILTER},
2982: $self->{ALREADY_SEEN},
1.314 albertel 2983: $self->{CONDITION},
2984: $self->{FORCE_TOP});
1.116 bowersj2 2985:
2986: }
2987:
1.98 bowersj2 2988: # Set up some bookkeeping information.
2989: $self->{CURRENT_DEPTH} = 0;
2990: $self->{MAX_DEPTH} = $maxDepth;
2991: $self->{STACK} = [];
2992: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 2993: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 2994:
2995: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
2996: push @{$self->{STACK}}, [];
2997: }
2998:
1.107 bowersj2 2999: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 3000: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
3001: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
3002:
3003: bless ($self);
3004:
3005: return $self;
3006: }
3007:
3008: sub next {
3009: my $self = shift;
1.256 albertel 3010: my $closeAllPages=shift;
1.222 bowersj2 3011: if ($self->{FINISHED}) {
3012: return END_ITERATOR();
3013: }
3014:
1.162 bowersj2 3015: # If we want to return the top-level map object, and haven't yet,
3016: # do so.
3017: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
3018: $self->{HAVE_RETURNED_0} = 1;
3019: return $self->{NAV_MAP}->getById('0.0');
3020: }
1.401 albertel 3021: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
3022: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
3023: return $self->BEGIN_MAP();
3024: }
1.98 bowersj2 3025:
3026: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3027: # grab the next from the recursive iterator
1.256 albertel 3028: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 3029:
3030: # is it a begin or end map? If so, update the depth
3031: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3032: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3033:
3034: # Are we back at depth 0? If so, stop recursing
3035: if ($self->{RECURSIVE_DEPTH} == 0) {
3036: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3037: }
3038:
3039: return $next;
3040: }
3041:
3042: if (defined($self->{FORCE_NEXT})) {
3043: my $tmp = $self->{FORCE_NEXT};
3044: $self->{FORCE_NEXT} = undef;
3045: return $tmp;
3046: }
3047:
3048: # Have we not yet begun? If not, return BEGIN_MAP and
3049: # remember we've started.
3050: if ( !$self->{STARTED} ) {
3051: $self->{STARTED} = 1;
3052: return $self->BEGIN_MAP();
3053: }
3054:
3055: # Here's the guts of the iterator.
3056:
3057: # Find the next resource, if any.
3058: my $found = 0;
3059: my $i = $self->{MAX_DEPTH};
3060: my $newDepth;
3061: my $here;
3062: while ( $i >= 0 && !$found ) {
1.107 bowersj2 3063: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3064: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 3065: $found = 1;
3066: $newDepth = $i;
3067: }
3068: $i--;
3069: }
3070:
3071: # If we still didn't find anything, we're done.
3072: if ( !$found ) {
3073: # We need to get back down to the correct branch depth
3074: if ( $self->{CURRENT_DEPTH} > 0 ) {
3075: $self->{CURRENT_DEPTH}--;
3076: return END_BRANCH();
3077: } else {
1.222 bowersj2 3078: $self->{FINISHED} = 1;
1.98 bowersj2 3079: return END_MAP();
3080: }
3081: }
3082:
1.104 bowersj2 3083: # If this is not a resource, it must be an END_BRANCH marker we want
3084: # to return directly.
1.107 bowersj2 3085: if (!ref($here)) { # **8**
1.104 bowersj2 3086: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3087: $self->{CURRENT_DEPTH}--;
3088: return $here;
3089: }
3090: }
3091:
3092: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3093: $self->{HERE} = $here;
3094:
1.98 bowersj2 3095: # Get to the right level
3096: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3097: push @{$self->{STACK}->[$newDepth]}, $here;
3098: $self->{CURRENT_DEPTH}--;
3099: return END_BRANCH();
3100: }
3101: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3102: push @{$self->{STACK}->[$newDepth]}, $here;
3103: $self->{CURRENT_DEPTH}++;
3104: return BEGIN_BRANCH();
3105: }
3106:
3107: # If we made it here, we have the next resource, and we're at the
3108: # right branch level. So let's examine the resource for where
3109: # we can get to from here.
3110:
3111: # So we need to look at all the resources we can get to from here,
3112: # categorize them if we haven't seen them, remember if we have a new
3113: my $nextUnfiltered = $here->getNext();
1.104 bowersj2 3114: my $maxDepthAdded = -1;
3115:
1.98 bowersj2 3116: for (@$nextUnfiltered) {
3117: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 3118: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3119: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 3120: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 3121: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 3122: }
3123: }
1.104 bowersj2 3124:
3125: # Is this the end of a branch? If so, all of the resources examined above
1.398 banghart 3126: # led to lower levels than the one we are currently at, so we push a END_BRANCH
1.104 bowersj2 3127: # marker onto the stack so we don't forget.
3128: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3129: # BC branch and gets to C, it will see F as the only next resource, but it's
3130: # one level lower. Thus, this is the end of the branch, since there are no
3131: # more resources added to this level or above.
1.111 bowersj2 3132: # We don't do this if the examined resource is the finish resource,
3133: # because the condition given above is true, but the "END_MAP" will
3134: # take care of things and we should already be at depth 0.
1.104 bowersj2 3135: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3136: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3137: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3138: }
3139:
1.98 bowersj2 3140: # That ends the main iterator logic. Now, do we want to recurse
3141: # down this map (if this resource is a map)?
1.256 albertel 3142: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3143: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3144: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3145: my $firstResource = $self->{HERE}->map_start();
3146: my $finishResource = $self->{HERE}->map_finish();
3147:
3148: $self->{RECURSIVE_ITERATOR} =
3149: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3150: $finishResource, $self->{FILTER},
1.314 albertel 3151: $self->{ALREADY_SEEN},
3152: $self->{CONDITION},
3153: $self->{FORCE_TOP});
1.98 bowersj2 3154: }
3155:
1.116 bowersj2 3156: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3157: # Should you ever find you need it, make sure to add an option to the code
3158: # that you can use; other things depend on this behavior.
1.138 bowersj2 3159: my $browsePriv = $self->{HERE}->browsePriv();
3160: if (!$self->{HERE}->src() ||
3161: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3162: return $self->next($closeAllPages);
1.116 bowersj2 3163: }
3164:
1.98 bowersj2 3165: return $self->{HERE};
3166:
3167: }
3168:
3169: =pod
3170:
1.174 albertel 3171: The other method available on the iterator is B<getStack>, which
3172: returns an array populated with the current 'stack' of maps, as
3173: references to the resource objects. Example: This is useful when
3174: making the navigation map, as we need to check whether we are under a
3175: page map to see if we need to link directly to the resource, or to the
3176: page. The first elements in the array will correspond to the top of
3177: the stack (most inclusive map).
1.98 bowersj2 3178:
3179: =cut
3180:
3181: sub getStack {
3182: my $self=shift;
3183:
3184: my @stack;
3185:
3186: $self->populateStack(\@stack);
3187:
3188: return \@stack;
3189: }
3190:
3191: # Private method: Calls the iterators recursively to populate the stack.
3192: sub populateStack {
3193: my $self=shift;
3194: my $stack = shift;
3195:
3196: push @$stack, $self->{HERE} if ($self->{HERE});
3197:
3198: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3199: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3200: }
1.94 bowersj2 3201: }
3202:
3203: 1;
3204:
3205: package Apache::lonnavmaps::DFSiterator;
1.365 albertel 3206: use Scalar::Util qw(weaken);
1.320 albertel 3207: use Apache::lonnet;
3208:
1.100 bowersj2 3209: # Not documented in the perldoc: This is a simple iterator that just walks
3210: # through the nav map and presents the resources in a depth-first search
3211: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3212: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3213: # useful for pre-processing of some kind, and is in fact used by the main
3214: # iterator that way, but that's about it.
3215: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3216: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3217: # use might be found for it. - Jeremy
1.94 bowersj2 3218:
1.117 bowersj2 3219: # Unlike the main iterator, this DOES return all resources, even blank ones.
3220: # The main iterator needs them to correctly preprocess the map.
3221:
1.94 bowersj2 3222: sub BEGIN_MAP { return 1; } # begining of a new map
3223: sub END_MAP { return 2; } # end of the map
3224: sub FORWARD { return 1; } # go forward
3225: sub BACKWARD { return 2; }
3226:
1.100 bowersj2 3227: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3228: # filter hash ref (or undef), already seen hash or undef, condition
3229: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3230: sub new {
3231: # magic invocation to create a class instance
3232: my $proto = shift;
3233: my $class = ref($proto) || $proto;
3234: my $self = {};
3235:
1.300 albertel 3236: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3237: return undef unless ($self->{NAV_MAP});
3238:
3239: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3240: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3241:
3242: # If the given resources are just the ID of the resource, get the
3243: # objects
3244: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3245: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3246: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3247: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3248:
3249: $self->{FILTER} = shift;
3250:
3251: # A hash, used as a set, of resource already seen
3252: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3253: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3254: $self->{CONDITION} = shift;
1.89 bowersj2 3255: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3256:
1.100 bowersj2 3257: # Flag: Have we started yet?
1.51 bowersj2 3258: $self->{STARTED} = 0;
3259:
3260: # Should we continue calling the recursive iterator, if any?
3261: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3262: # The recursive iterator, if any
3263: $self->{RECURSIVE_ITERATOR} = undef;
3264: # Are we recursing on a map, or a branch?
3265: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3266: # And the count of how deep it is, so that this iterator can keep track of
3267: # when to pick back up again.
3268: $self->{RECURSIVE_DEPTH} = 0;
3269:
3270: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3271: $self->{STACK} = [];
1.51 bowersj2 3272:
3273: # Start with the first resource
1.89 bowersj2 3274: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3275: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3276: } else {
1.100 bowersj2 3277: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3278: }
1.51 bowersj2 3279:
3280: bless($self);
3281: return $self;
3282: }
3283:
3284: sub next {
3285: my $self = shift;
3286:
3287: # Are we using a recursive iterator? If so, pull from that and
3288: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3289: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3290: # grab the next from the recursive iterator
3291: my $next = $self->{RECURSIVE_ITERATOR}->next();
3292:
3293: # is it a begin or end map? Update depth if so
3294: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3295: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3296:
3297: # Are we back at depth 0? If so, stop recursing.
3298: if ($self->{RECURSIVE_DEPTH} == 0) {
3299: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3300: }
3301:
3302: return $next;
3303: }
3304:
3305: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3306: # END_MAP, which will end the iterator.
3307: if (scalar(@{$self->{STACK}}) == 0) {
3308: return $self->END_MAP();
1.51 bowersj2 3309: }
3310:
3311: # Have we not yet begun? If not, return BEGIN_MAP and
3312: # remember that we've started.
3313: if ( !$self->{STARTED} ) {
3314: $self->{STARTED} = 1;
3315: return $self->BEGIN_MAP;
3316: }
3317:
3318: # Get the next resource in the branch
1.100 bowersj2 3319: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3320:
1.100 bowersj2 3321: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3322: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3323:
3324: # Get the next possible resources
1.90 bowersj2 3325: my $nextUnfiltered;
1.89 bowersj2 3326: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3327: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3328: } else {
1.90 bowersj2 3329: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3330: }
1.51 bowersj2 3331: my $next = [];
3332:
3333: # filter the next possibilities to remove things we've
1.100 bowersj2 3334: # already seen.
1.394 raeburn 3335: foreach my $item (@$nextUnfiltered) {
3336: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
3337: push @$next, $item;
1.52 bowersj2 3338: }
1.51 bowersj2 3339: }
3340:
3341: while (@$next) {
1.100 bowersj2 3342: # copy the next possibilities over to the stack
3343: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3344: }
3345:
3346: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3347: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3348: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3349: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3350: my $firstResource = $self->{HERE}->map_start();
3351: my $finishResource = $self->{HERE}->map_finish();
3352:
3353: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3354: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3355: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3356: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3357: }
3358:
3359: return $self->{HERE};
1.190 bowersj2 3360: }
3361:
3362: # Identical to the full iterator methods of the same name. Hate to copy/paste
3363: # but I also hate to "inherit" either iterator from the other.
3364:
3365: sub getStack {
3366: my $self=shift;
3367:
3368: my @stack;
3369:
3370: $self->populateStack(\@stack);
3371:
3372: return \@stack;
3373: }
3374:
3375: # Private method: Calls the iterators recursively to populate the stack.
3376: sub populateStack {
3377: my $self=shift;
3378: my $stack = shift;
3379:
3380: push @$stack, $self->{HERE} if ($self->{HERE});
3381:
3382: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3383: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3384: }
1.51 bowersj2 3385: }
3386:
1.1 www 3387: 1;
1.2 www 3388:
1.51 bowersj2 3389: package Apache::lonnavmaps::resource;
1.365 albertel 3390: use Scalar::Util qw(weaken);
1.51 bowersj2 3391: use Apache::lonnet;
3392:
3393: =pod
3394:
1.217 bowersj2 3395: =head1 Object: resource
1.51 bowersj2 3396:
1.217 bowersj2 3397: X<resource, navmap object>
1.174 albertel 3398: A resource object encapsulates a resource in a resource map, allowing
3399: easy manipulation of the resource, querying the properties of the
3400: resource (including user properties), and represents a reference that
3401: can be used as the canonical representation of the resource by
3402: lonnavmap clients like renderers.
3403:
3404: A resource only makes sense in the context of a navmap, as some of the
3405: data is stored in the navmap object.
3406:
3407: You will probably never need to instantiate this object directly. Use
3408: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3409: starting resource.
1.51 bowersj2 3410:
1.188 bowersj2 3411: Resource objects respect the parameter_hiddenparts, which suppresses
3412: various parts according to the wishes of the map author. As of this
3413: writing, there is no way to override this parameter, and suppressed
3414: parts will never be returned, nor will their response types or ids be
3415: stored.
3416:
1.217 bowersj2 3417: =head2 Overview
1.51 bowersj2 3418:
1.217 bowersj2 3419: A B<Resource> is the most granular type of object in LON-CAPA that can
3420: be included in a course. It can either be a particular resource, like
3421: an HTML page, external resource, problem, etc., or it can be a
3422: container sequence, such as a "page" or a "map".
3423:
3424: To see a sequence from the user's point of view, please see the
3425: B<Creating a Course: Maps and Sequences> chapter of the Author's
3426: Manual.
3427:
3428: A Resource Object, once obtained from a navmap object via a B<getBy*>
3429: method of the navmap, or from an iterator, allows you to query
3430: information about that resource.
3431:
3432: Generally, you do not ever want to create a resource object yourself,
3433: so creation has been left undocumented. Always retrieve resources
3434: from navmap objects.
3435:
3436: =head3 Identifying Resources
3437:
3438: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3439: unique to that resource for a given course. X<resource ID, in big hash>
3440: The Resource ID has the form #.#, where the first number is the same
3441: for every resource in a map, and the second is unique. For instance,
3442: for a course laid out like this:
3443:
3444: * Problem 1
3445: * Map
3446: * Resource 2
3447: * Resource 3
3448:
3449: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3450: C<Resource 3> will share a first number. The second number may end up
3451: re-used between the two groups.
3452:
3453: The resource ID is only used in the big hash, but can be used in the
3454: context of a course to identify a resource easily. (For instance, the
3455: printing system uses it to record which resources from a sequence you
3456: wish to print.)
3457:
3458: X<symb> X<resource, symb>
3459: All resources also have B<symb>s, which uniquely identify a resource
3460: in a course. Many internal LON-CAPA functions expect a symb. A symb
3461: carries along with it the URL of the resource, and the map it appears
1.398 banghart 3462: in. Symbs are much larger than resource IDs.
1.51 bowersj2 3463:
3464: =cut
3465:
3466: sub new {
3467: # magic invocation to create a class instance
3468: my $proto = shift;
3469: my $class = ref($proto) || $proto;
3470: my $self = {};
3471:
1.300 albertel 3472: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3473: $self->{ID} = shift;
3474:
3475: # Store this new resource in the parent nav map's cache.
3476: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 3477: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 3478:
3479: # A hash that can be used by two-pass algorithms to store data
3480: # about this resource in. Not used by the resource object
3481: # directly.
3482: $self->{DATA} = {};
3483:
3484: bless($self);
3485:
3486: return $self;
3487: }
3488:
1.70 bowersj2 3489: # private function: simplify the NAV_HASH lookups we keep doing
3490: # pass the name, and to automatically append my ID, pass a true val on the
3491: # second param
3492: sub navHash {
3493: my $self = shift;
3494: my $param = shift;
3495: my $id = shift;
1.441 raeburn 3496: my $arg = $param . ($id?$self->{ID}:"");
3497: if (defined($arg)) {
3498: return $self->{NAV_MAP}->navhash($arg);
3499: }
3500: return;
1.70 bowersj2 3501: }
3502:
1.51 bowersj2 3503: =pod
3504:
1.217 bowersj2 3505: =head2 Methods
1.70 bowersj2 3506:
1.217 bowersj2 3507: Once you have a resource object, here's what you can do with it:
3508:
3509: =head3 Attribute Retrieval
3510:
3511: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 3512:
3513: =over 4
3514:
1.217 bowersj2 3515: =item * B<ID>: Every resource has an ID that is unique for that
3516: resource in the course it is in. The ID is actually in the hash
3517: representing the resource, so for a resource object $res, obtain
3518: it via C<$res->{ID}).
3519:
1.174 albertel 3520: =item * B<compTitle>:
3521:
3522: Returns a "composite title", that is equal to $res->title() if the
3523: resource has a title, and is otherwise the last part of the URL (e.g.,
3524: "problem.problem").
3525:
3526: =item * B<ext>:
3527:
3528: Returns true if the resource is external.
3529:
3530: =item * B<kind>:
3531:
3532: Returns the kind of the resource from the compiled nav map.
3533:
3534: =item * B<randomout>:
1.106 bowersj2 3535:
1.174 albertel 3536: Returns true if this resource was chosen to NOT be shown to the user
3537: by the random map selection feature. In other words, this is usually
3538: false.
1.70 bowersj2 3539:
1.174 albertel 3540: =item * B<randompick>:
1.70 bowersj2 3541:
1.400 albertel 3542: Returns the number of randomly picked items for a map if the randompick
3543: feature is being used on the map.
3544:
3545: =item * B<randomorder>:
3546:
3547: Returns true for a map if the randomorder feature is being used on the
3548: map.
1.70 bowersj2 3549:
1.174 albertel 3550: =item * B<src>:
1.51 bowersj2 3551:
1.174 albertel 3552: Returns the source for the resource.
1.70 bowersj2 3553:
1.174 albertel 3554: =item * B<symb>:
1.70 bowersj2 3555:
1.174 albertel 3556: Returns the symb for the resource.
1.70 bowersj2 3557:
1.174 albertel 3558: =item * B<title>:
1.70 bowersj2 3559:
1.174 albertel 3560: Returns the title of the resource.
3561:
1.51 bowersj2 3562: =back
3563:
3564: =cut
3565:
3566: # These info functions can be used directly, as they don't return
3567: # resource information.
1.85 bowersj2 3568: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.303 albertel 3569: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
1.70 bowersj2 3570: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 3571: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 3572: # considered private and undocumented
1.51 bowersj2 3573: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
3574: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 3575: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
3576: sub randompick {
3577: my $self = shift;
1.410 raeburn 3578: my $randompick = $self->parmval('randompick');
3579: return $randompick;
1.68 bowersj2 3580: }
1.400 albertel 3581: sub randomorder {
3582: my $self = shift;
1.410 raeburn 3583: my $randomorder = $self->parmval('randomorder');
3584: return ($randomorder =~ /^yes$/i);
1.400 albertel 3585: }
1.303 albertel 3586: sub link {
3587: my $self=shift;
3588: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
3589: return $self->src;
3590: }
1.51 bowersj2 3591: sub src {
3592: my $self=shift;
3593: return $self->navHash("src_", 1);
3594: }
1.303 albertel 3595: sub shown_symb {
3596: my $self=shift;
3597: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->symb());}
3598: return $self->symb();
3599: }
1.328 www 3600: sub id {
3601: my $self=shift;
3602: return $self->{ID};
3603: }
3604: sub enclosing_map_src {
3605: my $self=shift;
3606: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3607: return $self->navHash('map_id_'.$first);
3608: }
1.51 bowersj2 3609: sub symb {
3610: my $self=shift;
3611: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3612: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 3613: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 3614: . '___' . $second . '___' . $symbSrc;
1.223 albertel 3615: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 3616: }
1.321 raeburn 3617: sub wrap_symb {
3618: my $self = shift;
3619: return $self->{NAV_MAP}->wrap_symb($self->symb());
3620: }
1.213 bowersj2 3621: sub title {
3622: my $self=shift;
3623: if ($self->{ID} eq '0.0') {
3624: # If this is the top-level map, return the title of the course
3625: # since this map can not be titled otherwise.
1.320 albertel 3626: return $env{'course.'.$env{'request.course.id'}.'.description'};
1.213 bowersj2 3627: }
3628: return $self->navHash("title_", 1); }
1.217 bowersj2 3629: # considered private and undocumented
1.70 bowersj2 3630: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.301 albertel 3631: sub condition {
3632: my $self=shift;
3633: my $undercond=$self->navHash("undercond_", 1);
3634: if (!defined($undercond)) { return 1; };
3635: my $condid=$self->navHash("condid_$undercond");
3636: if (!defined($condid)) { return 1; };
3637: my $condition=&Apache::lonnet::directcondval($condid);
3638: return $condition;
3639: }
1.342 albertel 3640: sub condval {
3641: my $self=shift;
1.359 albertel 3642: my ($pathname,$filename) =
3643: &Apache::lonnet::split_uri_for_cond($self->src());
1.342 albertel 3644:
3645: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3646: /\&\Q$filename\E\:([\d\|]+)\&/);
3647: if ($match) {
3648: return &Apache::lonnet::condval($1);
3649: }
3650: return 0;
3651: }
1.106 bowersj2 3652: sub compTitle {
3653: my $self = shift;
3654: my $title = $self->title();
1.176 www 3655: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 3656: if (!$title) {
3657: $title = $self->src();
3658: $title = substr($title, rindex($title, '/') + 1);
3659: }
3660: return $title;
3661: }
1.399 albertel 3662:
1.70 bowersj2 3663: =pod
3664:
3665: B<Predicate Testing the Resource>
3666:
3667: These methods are shortcuts to deciding if a given resource has a given property.
3668:
3669: =over 4
3670:
1.174 albertel 3671: =item * B<is_map>:
3672:
3673: Returns true if the resource is a map type.
3674:
3675: =item * B<is_problem>:
1.70 bowersj2 3676:
1.174 albertel 3677: Returns true if the resource is a problem type, false
3678: otherwise. (Looks at the extension on the src field; might need more
3679: to work correctly.)
1.70 bowersj2 3680:
1.174 albertel 3681: =item * B<is_page>:
1.70 bowersj2 3682:
1.174 albertel 3683: Returns true if the resource is a page.
3684:
3685: =item * B<is_sequence>:
3686:
3687: Returns true if the resource is a sequence.
1.70 bowersj2 3688:
3689: =back
3690:
3691: =cut
3692:
1.256 albertel 3693: sub hasResource {
3694: my $self = shift;
3695: return $self->{NAV_MAP}->hasResource(@_);
3696: }
3697:
3698: sub retrieveResources {
3699: my $self = shift;
3700: return $self->{NAV_MAP}->retrieveResources(@_);
3701: }
1.70 bowersj2 3702:
1.369 albertel 3703: sub is_exam {
3704: my ($self,$part) = @_;
1.410 raeburn 3705: my $type = $self->parmval('type',$part);
3706: if ($type eq 'exam') {
1.369 albertel 3707: return 1;
3708: }
3709: if ($self->src() =~ /\.(exam)$/) {
3710: return 1;
3711: }
3712: return 0;
3713: }
1.70 bowersj2 3714: sub is_html {
1.51 bowersj2 3715: my $self=shift;
3716: my $src = $self->src();
1.70 bowersj2 3717: return ($src =~ /html$/);
1.51 bowersj2 3718: }
1.70 bowersj2 3719: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
3720: sub is_page {
1.51 bowersj2 3721: my $self=shift;
3722: my $src = $self->src();
1.205 bowersj2 3723: return $self->navHash("is_map_", 1) &&
3724: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 3725: }
1.361 albertel 3726: sub is_practice {
3727: my $self=shift;
3728: my ($part) = @_;
1.410 raeburn 3729: my $type = $self->parmval('type',$part);
3730: if ($type eq 'practice') {
1.361 albertel 3731: return 1;
3732: }
3733: return 0;
3734: }
1.70 bowersj2 3735: sub is_problem {
1.51 bowersj2 3736: my $self=shift;
3737: my $src = $self->src();
1.361 albertel 3738: if ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
3739: return !($self->is_practice());
3740: }
3741: return 0;
1.256 albertel 3742: }
1.443 foxr 3743: #
3744: # The has below is the set of status that are considered 'incomplete'
3745: #
3746: my %incomplete_hash =
3747: (
3748: TRIES_LEFT() => 1,
3749: OPEN() => 1,
3750: ATTEMPTED() => 1
3751:
3752: );
3753: #
3754: # Return tru if a problem is incomplete... for now incomplete means that
3755: # any part of the problem is incomplete.
3756: # Note that if the resources is not a problem, 0 is returned.
3757: #
3758: sub is_incomplete {
3759: my $self = shift;
3760: if ($self->is_problem()) {
3761: &Apache::lonnet::logthis('is problem');
3762: foreach my $part (@{$self->parts()}) {
3763: &Apache::lonnet::logthis("$part status ".$self->status($part));
3764: if (exists($incomplete_hash{$self->status($part)})) {
3765: return 1;
3766: }
3767: }
3768: }
3769: return 0;
3770:
3771: }
1.413 www 3772: sub is_raw_problem {
3773: my $self=shift;
3774: my $src = $self->src();
3775: if ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
3776: return 1;
3777: }
3778: return 0;
3779: }
3780:
1.256 albertel 3781: sub contains_problem {
3782: my $self=shift;
3783: if ($self->is_page()) {
3784: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
3785: return $hasProblem;
3786: }
3787: return 0;
1.51 bowersj2 3788: }
1.401 albertel 3789: sub map_contains_problem {
3790: my $self=shift;
3791: if ($self->is_map()) {
3792: my $has_problem=
3793: $self->hasResource($self,sub { $_[0]->is_problem() },1);
3794: return $has_problem;
3795: }
3796: return 0;
3797: }
1.70 bowersj2 3798: sub is_sequence {
1.51 bowersj2 3799: my $self=shift;
1.205 bowersj2 3800: return $self->navHash("is_map_", 1) &&
1.426 droeschl 3801: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 3802: }
1.261 matthew 3803: sub is_survey {
3804: my $self = shift();
3805: my $part = shift();
1.410 raeburn 3806: my $type = $self->parmval('type',$part);
1.444 raeburn 3807: if (($type eq 'survey') || ($type eq 'surveycred')) {
1.261 matthew 3808: return 1;
3809: }
1.263 albertel 3810: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 3811: return 1;
3812: }
3813: return 0;
3814: }
1.444 raeburn 3815: sub is_anonsurvey {
3816: my $self = shift();
3817: my $part = shift();
3818: my $type = $self->parmval('type',$part);
3819: if (($type eq 'anonsurvey') || ($type eq 'anonsurveycred')) {
3820: return 1;
3821: }
3822: return 0;
3823: }
1.360 albertel 3824: sub is_task {
3825: my $self=shift;
3826: my $src = $self->src();
3827: return ($src =~ /\.(task)$/)
3828: }
1.51 bowersj2 3829:
1.266 raeburn 3830: sub is_empty_sequence {
3831: my $self=shift;
3832: my $src = $self->src();
3833: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
3834: }
3835:
1.101 bowersj2 3836: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 3837: sub parmval {
3838: my $self = shift;
3839: my $what = shift;
1.185 bowersj2 3840: my $part = shift;
3841: if (!defined($part)) {
3842: $part = '0';
3843: }
1.51 bowersj2 3844: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
3845: }
3846:
1.70 bowersj2 3847: =pod
3848:
3849: B<Map Methods>
3850:
1.174 albertel 3851: These methods are useful for getting information about the map
3852: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 3853:
3854: =over 4
3855:
1.174 albertel 3856: =item * B<map_finish>:
3857:
3858: Returns a reference to a resource object corresponding to the finish
3859: resource of the map.
1.70 bowersj2 3860:
1.174 albertel 3861: =item * B<map_pc>:
1.70 bowersj2 3862:
1.174 albertel 3863: Returns the pc value of the map, which is the first number that
3864: appears in the resource ID of the resources in the map, and is the
3865: number that appears around the middle of the symbs of the resources in
3866: that map.
1.70 bowersj2 3867:
1.174 albertel 3868: =item * B<map_start>:
3869:
3870: Returns a reference to a resource object corresponding to the start
3871: resource of the map.
3872:
3873: =item * B<map_type>:
3874:
3875: Returns a string with the type of the map in it.
1.70 bowersj2 3876:
3877: =back
1.51 bowersj2 3878:
1.70 bowersj2 3879: =cut
1.51 bowersj2 3880:
3881: sub map_finish {
3882: my $self = shift;
3883: my $src = $self->src();
1.381 albertel 3884: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 3885: my $res = $self->navHash("map_finish_$src", 0);
3886: $res = $self->{NAV_MAP}->getById($res);
3887: return $res;
3888: }
1.70 bowersj2 3889: sub map_pc {
3890: my $self = shift;
1.381 albertel 3891: my $src = $self->src();
1.70 bowersj2 3892: return $self->navHash("map_pc_$src", 0);
3893: }
1.51 bowersj2 3894: sub map_start {
3895: my $self = shift;
3896: my $src = $self->src();
1.381 albertel 3897: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 3898: my $res = $self->navHash("map_start_$src", 0);
3899: $res = $self->{NAV_MAP}->getById($res);
3900: return $res;
3901: }
3902: sub map_type {
3903: my $self = shift;
3904: my $pc = $self->map_pc();
3905: return $self->navHash("map_type_$pc", 0);
3906: }
3907:
3908: #####
3909: # Property queries
3910: #####
3911:
3912: # These functions will be responsible for returning the CORRECT
3913: # VALUE for the parameter, no matter what. So while they may look
1.398 banghart 3914: # like direct calls to parmval, they can be more than that.
1.51 bowersj2 3915: # So, for instance, the duedate function should use the "duedatetype"
1.398 banghart 3916: # information, rather than the resource object user.
1.51 bowersj2 3917:
3918: =pod
3919:
3920: =head2 Resource Parameters
3921:
1.174 albertel 3922: In order to use the resource parameters correctly, the nav map must
3923: have been instantiated with genCourseAndUserOptions set to true, so
3924: the courseopt and useropt is read correctly. Then, you can call these
3925: functions to get the relevant parameters for the resource. Each
3926: function defaults to part "0", but can be directed to another part by
3927: passing the part as the parameter.
3928:
3929: These methods are responsible for getting the parameter correct, not
3930: merely reflecting the contents of the GDBM hashes. As we move towards
3931: dates relative to other dates, these methods should be updated to
3932: reflect that. (Then, anybody using these methods will not have to update
3933: their code.)
3934:
3935: =over 4
3936:
3937: =item * B<acc>:
3938:
3939: Get the Client IP/Name Access Control information.
1.51 bowersj2 3940:
1.174 albertel 3941: =item * B<answerdate>:
1.51 bowersj2 3942:
1.174 albertel 3943: Get the answer-reveal date for the problem.
3944:
1.211 bowersj2 3945: =item * B<awarded>:
3946:
3947: Gets the awarded value for the problem part. Requires genUserData set to
3948: true when the navmap object was created.
3949:
1.174 albertel 3950: =item * B<duedate>:
3951:
3952: Get the due date for the problem.
3953:
3954: =item * B<tries>:
3955:
3956: Get the number of tries the student has used on the problem.
3957:
3958: =item * B<maxtries>:
3959:
3960: Get the number of max tries allowed.
3961:
3962: =item * B<opendate>:
1.51 bowersj2 3963:
1.174 albertel 3964: Get the open date for the problem.
1.51 bowersj2 3965:
1.174 albertel 3966: =item * B<sig>:
1.51 bowersj2 3967:
1.174 albertel 3968: Get the significant figures setting.
1.51 bowersj2 3969:
1.174 albertel 3970: =item * B<tol>:
1.51 bowersj2 3971:
1.174 albertel 3972: Get the tolerance for the problem.
1.51 bowersj2 3973:
1.174 albertel 3974: =item * B<tries>:
1.51 bowersj2 3975:
1.174 albertel 3976: Get the number of tries the user has already used on the problem.
1.51 bowersj2 3977:
1.174 albertel 3978: =item * B<type>:
1.51 bowersj2 3979:
1.174 albertel 3980: Get the question type for the problem.
1.70 bowersj2 3981:
1.174 albertel 3982: =item * B<weight>:
1.51 bowersj2 3983:
1.174 albertel 3984: Get the weight for the problem.
1.51 bowersj2 3985:
3986: =back
3987:
3988: =cut
3989:
3990: sub acc {
3991: (my $self, my $part) = @_;
1.410 raeburn 3992: my $acc = $self->parmval("acc", $part);
3993: return $acc;
1.51 bowersj2 3994: }
3995: sub answerdate {
3996: (my $self, my $part) = @_;
3997: # Handle intervals
1.410 raeburn 3998: my $answerdatetype = $self->parmval("answerdate.type", $part);
3999: my $answerdate = $self->parmval("answerdate", $part);
4000: my $duedate = $self->parmval("duedate", $part);
4001: if ($answerdatetype eq 'date_interval') {
4002: $answerdate = $duedate + $answerdate;
1.51 bowersj2 4003: }
1.410 raeburn 4004: return $answerdate;
1.106 bowersj2 4005: }
1.211 bowersj2 4006: sub awarded {
4007: my $self = shift; my $part = shift;
1.221 bowersj2 4008: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 4009: if (!defined($part)) { $part = '0'; }
4010: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
4011: }
1.432 raeburn 4012: sub taskversion {
4013: my $self = shift; my $part = shift;
4014: $self->{NAV_MAP}->get_user_data();
4015: if (!defined($part)) { $part = '0'; }
4016: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.version'};
4017: }
4018: sub taskstatus {
4019: my $self = shift; my $part = shift;
4020: $self->{NAV_MAP}->get_user_data();
4021: if (!defined($part)) { $part = '0'; }
4022: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
4023: }
4024: sub solved {
4025: my $self = shift; my $part = shift;
4026: $self->{NAV_MAP}->get_user_data();
4027: if (!defined($part)) { $part = '0'; }
4028: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.solved'};
4029: }
4030: sub checkedin {
4031: my $self = shift; my $part = shift;
4032: $self->{NAV_MAP}->get_user_data();
4033: if (!defined($part)) { $part = '0'; }
4034: if ($self->is_task()) {
4035: my $version = $self->taskversion($part);
4036: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
4037: } else {
4038: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.checkedin.slot'});
4039: }
4040: }
1.382 albertel 4041: # this should work exactly like the copy in lonhomework.pm
1.51 bowersj2 4042: sub duedate {
4043: (my $self, my $part) = @_;
1.382 albertel 4044: my $date;
1.406 albertel 4045: my @interval=$self->parmval("interval", $part);
1.382 albertel 4046: my $due_date=$self->parmval("duedate", $part);
1.406 albertel 4047: if ($interval[0] =~ /\d+/) {
4048: my $first_access=&Apache::lonnet::get_first_access($interval[1],
4049: $self->symb);
1.382 albertel 4050: if (defined($first_access)) {
1.406 albertel 4051: my $interval = $first_access+$interval[0];
1.404 albertel 4052: $date = (!$due_date || $interval < $due_date) ? $interval
4053: : $due_date;
1.382 albertel 4054: } else {
4055: $date = $due_date;
4056: }
4057: } else {
4058: $date = $due_date;
1.260 albertel 4059: }
1.382 albertel 4060: return $date;
1.51 bowersj2 4061: }
1.334 albertel 4062: sub handgrade {
4063: (my $self, my $part) = @_;
1.399 albertel 4064: my @response_ids = $self->responseIds($part);
4065: if (@response_ids) {
4066: foreach my $response_id (@response_ids) {
1.410 raeburn 4067: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
4068: if (lc($handgrade) eq 'yes') {
1.399 albertel 4069: return 'yes';
4070: }
4071: }
4072: }
1.410 raeburn 4073: my $handgrade = $self->parmval("handgrade", $part);
4074: return $handgrade;
1.334 albertel 4075: }
1.51 bowersj2 4076: sub maxtries {
4077: (my $self, my $part) = @_;
1.410 raeburn 4078: my $maxtries = $self->parmval("maxtries", $part);
4079: return $maxtries;
1.51 bowersj2 4080: }
4081: sub opendate {
4082: (my $self, my $part) = @_;
1.410 raeburn 4083: my $opendatetype = $self->parmval("opendate.type", $part);
4084: my $opendate = $self->parmval("opendate", $part);
4085: if ($opendatetype eq 'date_interval') {
4086: my $duedate = $self->duedate($part);
4087: $opendate = $duedate - $opendate;
1.51 bowersj2 4088: }
1.410 raeburn 4089: return $opendate;
1.51 bowersj2 4090: }
1.185 bowersj2 4091: sub problemstatus {
4092: (my $self, my $part) = @_;
1.410 raeburn 4093: my $problemstatus = $self->parmval("problemstatus", $part);
4094: return lc($problemstatus);
1.185 bowersj2 4095: }
1.51 bowersj2 4096: sub sig {
4097: (my $self, my $part) = @_;
1.410 raeburn 4098: my $sig = $self->parmval("sig", $part);
4099: return $sig;
1.51 bowersj2 4100: }
4101: sub tol {
4102: (my $self, my $part) = @_;
1.410 raeburn 4103: my $tol = $self->parmval("tol", $part);
4104: return $tol;
1.51 bowersj2 4105: }
1.410 raeburn 4106: sub tries {
1.108 bowersj2 4107: my $self = shift;
4108: my $tries = $self->queryRestoreHash('tries', shift);
4109: if (!defined($tries)) { return '0';}
1.51 bowersj2 4110: return $tries;
4111: }
1.70 bowersj2 4112: sub type {
4113: (my $self, my $part) = @_;
1.410 raeburn 4114: my $type = $self->parmval("type", $part);
4115: return $type;
1.70 bowersj2 4116: }
1.109 bowersj2 4117: sub weight {
4118: my $self = shift; my $part = shift;
1.211 bowersj2 4119: if (!defined($part)) { $part = '0'; }
1.409 raeburn 4120: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
4121: $self->symb(), $env{'user.domain'},
4122: $env{'user.name'},
4123: $env{'request.course.sec'});
4124: return $weight;
1.274 matthew 4125: }
4126: sub part_display {
4127: my $self= shift(); my $partID = shift();
4128: if (! defined($partID)) { $partID = '0'; }
4129: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
4130: $self->symb);
4131: if (! defined($display) || $display eq '') {
4132: $display = $partID;
4133: }
4134: return $display;
1.70 bowersj2 4135: }
1.432 raeburn 4136: sub slot_control {
4137: my $self=shift(); my $part = shift();
4138: if (!defined($part)) { $part = '0'; }
4139: my $useslots = $self->parmval("useslots", $part);
4140: my $availablestudent = $self->parmval("availablestudent", $part);
4141: my $available = $self->parmval("available", $part);
4142: return ($useslots,$availablestudent,$available);
4143: }
1.51 bowersj2 4144:
4145: # Multiple things need this
4146: sub getReturnHash {
4147: my $self = shift;
4148:
4149: if (!defined($self->{RETURN_HASH})) {
1.84 bowersj2 4150: my %tmpHash = &Apache::lonnet::restore($self->symb());
1.51 bowersj2 4151: $self->{RETURN_HASH} = \%tmpHash;
4152: }
4153: }
4154:
4155: ######
4156: # Status queries
4157: ######
4158:
4159: # These methods query the status of problems.
4160:
4161: # If we need to count parts, this function determines the number of
4162: # parts from the metadata. When called, it returns a reference to a list
4163: # of strings corresponding to the parts. (Thus, using it in a scalar context
4164: # tells you how many parts you have in the problem:
4165: # $partcount = scalar($resource->countParts());
4166: # Don't use $self->{PARTS} directly because you don't know if it's been
4167: # computed yet.
4168:
4169: =pod
4170:
4171: =head2 Resource misc
4172:
4173: Misc. functions for the resource.
4174:
4175: =over 4
4176:
1.174 albertel 4177: =item * B<hasDiscussion>:
1.59 bowersj2 4178:
1.174 albertel 4179: Returns a false value if there has been discussion since the user last
4180: logged in, true if there has. Always returns false if the discussion
4181: data was not extracted when the nav map was constructed.
4182:
1.366 albertel 4183: =item * B<last_post_time>:
4184:
4185: Returns a false value if there hasn't been discussion otherwise returns
4186: unix timestamp of last time a discussion posting (or edit) was made.
4187:
1.393 raeburn 4188: =item * B<discussion_info>:
1.366 albertel 4189:
1.393 raeburn 4190: optional argument is a filter (currently can be 'unread');
4191: returns in scalar context the count of the number of discussion postings.
1.366 albertel 4192:
4193: returns in list context both the count of postings and a hash ref
1.393 raeburn 4194: containing information about the postings (subject, id, timestamp) in a hash.
4195:
4196: 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 4197:
1.174 albertel 4198: =item * B<getFeedback>:
4199:
4200: Gets the feedback for the resource and returns the raw feedback string
4201: for the resource, or the null string if there is no feedback or the
4202: email data was not extracted when the nav map was constructed. Usually
4203: used like this:
1.59 bowersj2 4204:
1.394 raeburn 4205: for my $url (split(/\,/, $res->getFeedback())) {
4206: my $link = &escape($url);
1.59 bowersj2 4207: ...
4208:
4209: and use the link as appropriate.
4210:
4211: =cut
4212:
4213: sub hasDiscussion {
4214: my $self = shift;
4215: return $self->{NAV_MAP}->hasDiscussion($self->symb());
4216: }
4217:
1.366 albertel 4218: sub last_post_time {
4219: my $self = shift;
4220: return $self->{NAV_MAP}->last_post_time($self->symb());
4221: }
4222:
1.393 raeburn 4223: sub discussion_info {
4224: my ($self,$filter) = @_;
4225: return $self->{NAV_MAP}->discussion_info($self->symb(),$filter);
1.366 albertel 4226: }
4227:
1.59 bowersj2 4228: sub getFeedback {
4229: my $self = shift;
1.124 bowersj2 4230: my $source = $self->src();
1.395 raeburn 4231: my $symb = $self->symb();
1.125 bowersj2 4232: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4233: return $self->{NAV_MAP}->getFeedback($symb,$source);
1.124 bowersj2 4234: }
4235:
4236: sub getErrors {
4237: my $self = shift;
4238: my $source = $self->src();
1.395 raeburn 4239: my $symb = $self->symb();
1.124 bowersj2 4240: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4241: return $self->{NAV_MAP}->getErrors($symb,$source);
1.59 bowersj2 4242: }
4243:
4244: =pod
4245:
1.174 albertel 4246: =item * B<parts>():
1.51 bowersj2 4247:
1.174 albertel 4248: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 4249: each part of the problem. Single part problems have only a part '0'.
4250: Multipart problems do not return their part '0', since they typically
4251: do not really matter.
1.174 albertel 4252:
4253: =item * B<countParts>():
4254:
4255: Returns the number of parts of the problem a student can answer. Thus,
4256: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 4257: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 4258:
1.290 matthew 4259: =item * B<countResponses>():
4260:
4261: Returns the total number of responses in the problem a student can answer.
4262:
4263: =item * B<responseTypes>():
4264:
4265: Returns a hash whose keys are the response types. The values are the number
4266: of times each response type is used. This is for the I<entire> problem, not
4267: just a single part.
4268:
1.192 bowersj2 4269: =item * B<multipart>():
4270:
1.193 bowersj2 4271: Returns true if the problem is multipart, false otherwise. Use this instead
4272: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 4273:
1.187 bowersj2 4274: =item * B<responseType>($part):
4275:
4276: Returns the response type of the part, without the word "response" on the
4277: end. Example return values: 'string', 'essay', 'numeric', etc.
4278:
1.193 bowersj2 4279: =item * B<responseIds>($part):
1.187 bowersj2 4280:
1.193 bowersj2 4281: Retreives the response IDs for the given part as an array reference containing
4282: strings naming the response IDs. This may be empty.
1.187 bowersj2 4283:
1.51 bowersj2 4284: =back
4285:
4286: =cut
4287:
4288: sub parts {
4289: my $self = shift;
4290:
1.192 bowersj2 4291: if ($self->ext) { return []; }
1.67 bowersj2 4292:
1.51 bowersj2 4293: $self->extractParts();
4294: return $self->{PARTS};
4295: }
4296:
4297: sub countParts {
4298: my $self = shift;
4299:
4300: my $parts = $self->parts();
1.191 bowersj2 4301:
4302: # If I left this here, then it's not necessary.
4303: #my $delta = 0;
4304: #for my $part (@$parts) {
4305: # if ($part eq '0') { $delta--; }
4306: #}
1.66 bowersj2 4307:
4308: if ($self->{RESOURCE_ERROR}) {
4309: return 0;
4310: }
4311:
1.191 bowersj2 4312: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 4313: }
4314:
1.290 matthew 4315: sub countResponses {
4316: my $self = shift;
4317: my $count;
1.293 matthew 4318: foreach my $part (@{$self->parts()}) {
4319: $count+= scalar($self->responseIds($part));
1.290 matthew 4320: }
4321: return $count;
4322: }
4323:
4324: sub responseTypes {
4325: my $self = shift;
1.291 albertel 4326: my %responses;
1.368 raeburn 4327: foreach my $part (@{$self->parts()}) {
1.290 matthew 4328: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 4329: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 4330: }
4331: }
1.291 albertel 4332: return %responses;
1.290 matthew 4333: }
4334:
1.192 bowersj2 4335: sub multipart {
4336: my $self = shift;
4337: return $self->countParts() > 1;
1.51 bowersj2 4338: }
4339:
1.225 bowersj2 4340: sub singlepart {
4341: my $self = shift;
4342: return $self->countParts() == 1;
4343: }
4344:
1.187 bowersj2 4345: sub responseType {
1.184 bowersj2 4346: my $self = shift;
4347: my $part = shift;
4348:
4349: $self->extractParts();
1.235 albertel 4350: if (defined($self->{RESPONSE_TYPES}->{$part})) {
4351: return @{$self->{RESPONSE_TYPES}->{$part}};
4352: } else {
4353: return undef;
4354: }
1.187 bowersj2 4355: }
4356:
1.193 bowersj2 4357: sub responseIds {
1.187 bowersj2 4358: my $self = shift;
4359: my $part = shift;
4360:
4361: $self->extractParts();
1.235 albertel 4362: if (defined($self->{RESPONSE_IDS}->{$part})) {
4363: return @{$self->{RESPONSE_IDS}->{$part}};
4364: } else {
4365: return undef;
4366: }
1.184 bowersj2 4367: }
4368:
4369: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 4370: # part types, and saves it.
1.51 bowersj2 4371: sub extractParts {
4372: my $self = shift;
4373:
1.153 bowersj2 4374: return if (defined($self->{PARTS}));
1.67 bowersj2 4375: return if ($self->ext);
1.51 bowersj2 4376:
4377: $self->{PARTS} = [];
4378:
1.181 bowersj2 4379: my %parts;
4380:
1.82 bowersj2 4381: # Retrieve part count, if this is a problem
4382: if ($self->is_problem()) {
1.240 albertel 4383: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 4384: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 4385:
1.239 bowersj2 4386: if ($partorder) {
4387: my @parts;
4388: for my $part (split (/,/,$partorder)) {
4389: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4390: push @parts, $part;
1.241 albertel 4391: $parts{$part} = 1;
1.239 bowersj2 4392: }
4393: }
4394: $self->{PARTS} = \@parts;
4395: } else {
4396: if (!$metadata) {
4397: $self->{RESOURCE_ERROR} = 1;
4398: $self->{PARTS} = [];
4399: $self->{PART_TYPE} = {};
4400: return;
4401: }
1.394 raeburn 4402: foreach my $entry (split(/\,/,$metadata)) {
4403: if ($entry =~ /^(?:part|Task)_(.*)$/) {
1.239 bowersj2 4404: my $part = $1;
4405: # This floods the logs if it blows up
4406: if (defined($parts{$part})) {
1.241 albertel 4407: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
4408: }
1.239 bowersj2 4409:
4410: # check to see if part is turned off.
4411:
4412: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4413: $parts{$part} = 1;
4414: }
4415: }
4416: }
4417: my @sortedParts = sort keys %parts;
4418: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 4419: }
1.82 bowersj2 4420:
1.187 bowersj2 4421:
1.284 matthew 4422: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 4423: my %responseIdHash;
4424: my %responseTypeHash;
4425:
1.189 bowersj2 4426:
4427: # Init the responseIdHash
1.394 raeburn 4428: foreach my $part (@{$self->{PARTS}}) {
4429: $responseIdHash{$part} = [];
1.189 bowersj2 4430: }
4431:
1.187 bowersj2 4432: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 4433: # response id are delimited by underscores, but both the part
1.187 bowersj2 4434: # name and response id can themselves have underscores in them.
4435: # So we have to use our knowlege of part names to figure out
4436: # where the part names begin and end, and even then, it is possible
4437: # to construct ambiguous situations.
1.379 albertel 4438: foreach my $data (split /,/, $metadata) {
4439: if ($data =~ /^([a-zA-Z]+)response_(.*)/
4440: || $data =~ /^(Task)_(.*)/) {
1.187 bowersj2 4441: my $responseType = $1;
4442: my $partStuff = $2;
4443: my $partIdSoFar = '';
4444: my @partChunks = split /_/, $partStuff;
4445: my $i = 0;
4446: for ($i = 0; $i < scalar(@partChunks); $i++) {
4447: if ($partIdSoFar) { $partIdSoFar .= '_'; }
4448: $partIdSoFar .= $partChunks[$i];
4449: if ($parts{$partIdSoFar}) {
4450: my @otherChunks = @partChunks[$i+1..$#partChunks];
4451: my $responseId = join('_', @otherChunks);
1.379 albertel 4452: if ($self->is_task()) {
4453: push(@{$responseIdHash{$partIdSoFar}},
4454: $partIdSoFar);
4455: } else {
4456: push(@{$responseIdHash{$partIdSoFar}},
4457: $responseId);
4458: }
4459: push(@{$responseTypeHash{$partIdSoFar}},
4460: $responseType);
1.187 bowersj2 4461: }
4462: }
4463: }
4464: }
1.264 albertel 4465: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 4466: #
4467: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 4468: if ($resorder) {
4469: my @resorder=split(/,/,$resorder);
4470: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 4471: my $i=0;
4472: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 4473: my @neworder;
4474: foreach my $possibleid (@resorder) {
4475: if (exists($resids{$possibleid})) {
1.286 albertel 4476: push(@neworder,$resids{$possibleid});
1.264 albertel 4477: }
4478: }
1.286 albertel 4479: my @ids;
4480: my @type;
4481: foreach my $element (@neworder) {
4482: push (@ids,$responseIdHash{$part}->[$element]);
4483: push (@type,$responseTypeHash{$part}->[$element]);
4484: }
4485: $responseIdHash{$part}=\@ids;
4486: $responseTypeHash{$part}=\@type;
1.264 albertel 4487: }
4488: }
1.187 bowersj2 4489: $self->{RESPONSE_IDS} = \%responseIdHash;
4490: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 4491: }
4492:
1.51 bowersj2 4493: return;
4494: }
4495:
4496: =pod
4497:
4498: =head2 Resource Status
4499:
1.174 albertel 4500: Problem resources have status information, reflecting their various
4501: dates and completion statuses.
1.51 bowersj2 4502:
1.174 albertel 4503: There are two aspects to the status: the date-related information and
4504: the completion information.
1.51 bowersj2 4505:
1.174 albertel 4506: Idiomatic usage of these two methods would probably look something
4507: like
1.51 bowersj2 4508:
1.394 raeburn 4509: foreach my $part ($resource->parts()) {
4510: my $dateStatus = $resource->getDateStatus($part);
4511: my $completionStatus = $resource->getCompletionStatus($part);
1.51 bowersj2 4512:
1.70 bowersj2 4513: or
4514:
1.394 raeburn 4515: my $status = $resource->status($part);
1.70 bowersj2 4516:
1.51 bowersj2 4517: ... use it here ...
4518: }
4519:
1.174 albertel 4520: Which you use depends on exactly what you are looking for. The
4521: status() function has been optimized for the nav maps display and may
4522: not precisely match what you need elsewhere.
1.101 bowersj2 4523:
1.174 albertel 4524: The symbolic constants shown below can be accessed through the
4525: resource object: C<$res->OPEN>.
1.101 bowersj2 4526:
1.51 bowersj2 4527: =over 4
4528:
1.174 albertel 4529: =item * B<getDateStatus>($part):
4530:
4531: ($part defaults to 0). A convenience function that returns a symbolic
4532: constant telling you about the date status of the part. The possible
4533: return values are:
1.51 bowersj2 4534:
4535: =back
4536:
4537: B<Date Codes>
4538:
4539: =over 4
4540:
1.174 albertel 4541: =item * B<OPEN_LATER>:
4542:
4543: The problem will be opened later.
4544:
4545: =item * B<OPEN>:
4546:
4547: Open and not yet due.
4548:
1.51 bowersj2 4549:
1.174 albertel 4550: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4551:
1.174 albertel 4552: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 4553:
1.174 albertel 4554: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 4555:
1.174 albertel 4556: The due date has passed and there is no answer opening date set.
1.51 bowersj2 4557:
1.174 albertel 4558: =item * B<ANSWER_OPEN>:
1.51 bowersj2 4559:
1.174 albertel 4560: The answer date is here.
4561:
4562: =item * B<NETWORK_FAILURE>:
4563:
4564: The information is unknown due to network failure.
1.51 bowersj2 4565:
4566: =back
4567:
4568: =cut
4569:
4570: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 4571: sub OPEN_LATER { return 0; }
4572: sub OPEN { return 1; }
4573: sub PAST_DUE_NO_ANSWER { return 2; }
4574: sub PAST_DUE_ANSWER_LATER { return 3; }
4575: sub ANSWER_OPEN { return 4; }
1.432 raeburn 4576: sub NOTHING_SET { return 5; }
1.54 bowersj2 4577: sub NETWORK_FAILURE { return 100; }
4578:
4579: # getDateStatus gets the date status for a given problem part.
4580: # Because answer date, due date, and open date are fully independent
4581: # (i.e., it is perfectly possible to *only* have an answer date),
4582: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
4583: # (past, future, none given). This function handles this with a decision
4584: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 4585:
4586: sub getDateStatus {
4587: my $self = shift;
4588: my $part = shift;
4589: $part = "0" if (!defined($part));
1.54 bowersj2 4590:
4591: # Always return network failure if there was one.
1.51 bowersj2 4592: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4593:
4594: my $now = time();
4595:
1.53 bowersj2 4596: my $open = $self->opendate($part);
4597: my $due = $self->duedate($part);
4598: my $answer = $self->answerdate($part);
4599:
4600: if (!$open && !$due && !$answer) {
4601: # no data on the problem at all
4602: # should this be the same as "open later"? think multipart.
4603: return $self->NOTHING_SET;
4604: }
1.59 bowersj2 4605: if (!$open || $now < $open) {return $self->OPEN_LATER}
4606: if (!$due || $now < $due) {return $self->OPEN}
4607: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
4608: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 4609: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 4610: }
4611:
4612: =pod
4613:
4614: B<>
4615:
4616: =over 4
4617:
1.174 albertel 4618: =item * B<getCompletionStatus>($part):
1.51 bowersj2 4619:
1.174 albertel 4620: ($part defaults to 0.) A convenience function that returns a symbolic
4621: constant telling you about the completion status of the part, with the
4622: following possible results:
4623:
4624: =back
1.51 bowersj2 4625:
4626: B<Completion Codes>
4627:
4628: =over 4
4629:
1.174 albertel 4630: =item * B<NOT_ATTEMPTED>:
4631:
4632: Has not been attempted at all.
4633:
4634: =item * B<INCORRECT>:
4635:
4636: Attempted, but wrong by student.
1.51 bowersj2 4637:
1.174 albertel 4638: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 4639:
1.174 albertel 4640: Attempted, but wrong by instructor override.
1.51 bowersj2 4641:
1.174 albertel 4642: =item * B<CORRECT>:
1.51 bowersj2 4643:
1.174 albertel 4644: Correct or correct by instructor.
1.51 bowersj2 4645:
1.174 albertel 4646: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 4647:
1.174 albertel 4648: Correct by instructor override.
1.51 bowersj2 4649:
1.174 albertel 4650: =item * B<EXCUSED>:
4651:
4652: Excused. Not yet implemented.
4653:
4654: =item * B<NETWORK_FAILURE>:
4655:
4656: Information not available due to network failure.
4657:
4658: =item * B<ATTEMPTED>:
4659:
4660: Attempted, and not yet graded.
1.69 bowersj2 4661:
1.51 bowersj2 4662: =back
4663:
4664: =cut
4665:
1.53 bowersj2 4666: sub NOT_ATTEMPTED { return 10; }
4667: sub INCORRECT { return 11; }
4668: sub INCORRECT_BY_OVERRIDE { return 12; }
4669: sub CORRECT { return 13; }
4670: sub CORRECT_BY_OVERRIDE { return 14; }
4671: sub EXCUSED { return 15; }
1.69 bowersj2 4672: sub ATTEMPTED { return 16; }
1.51 bowersj2 4673:
4674: sub getCompletionStatus {
4675: my $self = shift;
1.332 albertel 4676: my $part = shift;
1.51 bowersj2 4677: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4678:
1.332 albertel 4679: my $status = $self->queryRestoreHash('solved', $part);
1.51 bowersj2 4680:
1.251 www 4681: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 4682: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 4683: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.332 albertel 4684: if ($status eq 'correct_by_override') {
4685: return $self->CORRECT_BY_OVERRIDE;
4686: }
1.51 bowersj2 4687: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
4688: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
4689: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 4690: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 4691: return $self->NOT_ATTEMPTED;
1.108 bowersj2 4692: }
4693:
4694: sub queryRestoreHash {
4695: my $self = shift;
4696: my $hashentry = shift;
4697: my $part = shift;
1.185 bowersj2 4698: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 4699: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4700:
4701: $self->getReturnHash();
4702:
4703: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 4704: }
4705:
4706: =pod
4707:
4708: B<Composite Status>
4709:
1.174 albertel 4710: Along with directly returning the date or completion status, the
4711: resource object includes a convenience function B<status>() that will
4712: combine the two status tidbits into one composite status that can
1.191 bowersj2 4713: represent the status of the resource as a whole. This method represents
4714: the concept of the thing we want to display to the user on the nav maps
4715: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 4716: documented in the comments of the status method. The following results
4717: may be returned, all available as methods on the resource object
1.185 bowersj2 4718: ($res->NETWORK_FAILURE): In addition to the return values that match
4719: the date or completion status, this function can return "ANSWER_SUBMITTED"
4720: if that problemstatus parameter value is set to No, suppressing the
4721: incorrect/correct feedback.
1.51 bowersj2 4722:
4723: =over 4
4724:
1.174 albertel 4725: =item * B<NETWORK_FAILURE>:
4726:
4727: The network has failed and the information is not available.
1.51 bowersj2 4728:
1.174 albertel 4729: =item * B<NOTHING_SET>:
1.53 bowersj2 4730:
1.174 albertel 4731: No dates have been set for this problem (part) at all. (Because only
4732: certain parts of a multi-part problem may be assigned, this can not be
4733: collapsed into "open later", as we do not know a given part will EVER
4734: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 4735:
1.174 albertel 4736: =item * B<CORRECT>:
1.51 bowersj2 4737:
1.174 albertel 4738: For any reason at all, the part is considered correct.
1.54 bowersj2 4739:
1.174 albertel 4740: =item * B<EXCUSED>:
1.51 bowersj2 4741:
1.174 albertel 4742: For any reason at all, the problem is excused.
1.51 bowersj2 4743:
1.174 albertel 4744: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 4745:
1.174 albertel 4746: The problem is past due, not considered correct, and no answer date is
4747: set.
1.51 bowersj2 4748:
1.174 albertel 4749: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4750:
1.174 albertel 4751: The problem is past due, not considered correct, and an answer date in
4752: the future is set.
1.51 bowersj2 4753:
1.174 albertel 4754: =item * B<ANSWER_OPEN>:
4755:
4756: The problem is past due, not correct, and the answer is now available.
4757:
4758: =item * B<OPEN_LATER>:
4759:
4760: The problem is not yet open.
4761:
4762: =item * B<TRIES_LEFT>:
4763:
4764: The problem is open, has been tried, is not correct, but there are
4765: tries left.
4766:
4767: =item * B<INCORRECT>:
4768:
4769: The problem is open, and all tries have been used without getting the
4770: correct answer.
4771:
4772: =item * B<OPEN>:
4773:
4774: The item is open and not yet tried.
4775:
4776: =item * B<ATTEMPTED>:
4777:
4778: The problem has been attempted.
1.69 bowersj2 4779:
1.185 bowersj2 4780: =item * B<ANSWER_SUBMITTED>:
4781:
4782: An answer has been submitted, but the student should not see it.
4783:
1.51 bowersj2 4784: =back
4785:
4786: =cut
4787:
1.432 raeburn 4788: sub TRIES_LEFT { return 20; }
4789: sub ANSWER_SUBMITTED { return 21; }
4790: sub PARTIALLY_CORRECT { return 22; }
4791:
4792: sub RESERVED_LATER { return 30; }
4793: sub RESERVED { return 31; }
4794: sub RESERVED_LOCATION { return 32; }
4795: sub RESERVABLE { return 33; }
4796: sub RESERVABLE_LATER { return 34; }
4797: sub NOTRESERVABLE { return 35; }
4798: sub NOT_IN_A_SLOT { return 36; }
4799: sub NEEDS_CHECKIN { return 37; }
4800: sub WAITING_FOR_GRADE { return 38; }
4801: sub UNKNOWN { return 39; }
1.51 bowersj2 4802:
4803: sub status {
4804: my $self = shift;
4805: my $part = shift;
4806: if (!defined($part)) { $part = "0"; }
4807: my $completionStatus = $self->getCompletionStatus($part);
4808: my $dateStatus = $self->getDateStatus($part);
4809:
4810: # What we have is a two-dimensional matrix with 4 entries on one
4811: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 4812: # plus network failure and "no date data at all".
1.51 bowersj2 4813:
1.222 bowersj2 4814: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 4815: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 4816:
1.408 raeburn 4817: my $suppressFeedback = 0;
4818: if (($self->problemstatus($part) eq 'no') ||
4819: ($self->problemstatus($part) eq 'no_feedback_ever')) {
4820: $suppressFeedback = 1;
4821: }
1.236 bowersj2 4822: # If there's an answer date and we're past it, don't
4823: # suppress the feedback; student should know
1.330 albertel 4824: if ($self->duedate($part) && $self->duedate($part) < time() &&
4825: $self->answerdate($part) && $self->answerdate($part) < time()) {
1.236 bowersj2 4826: $suppressFeedback = 0;
4827: }
1.185 bowersj2 4828:
1.51 bowersj2 4829: # There are a few whole rows we can dispose of:
1.53 bowersj2 4830: if ($completionStatus == CORRECT ||
4831: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.332 albertel 4832: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
4833: my $awarded=$self->awarded($part);
4834: if ($awarded < 1 && $awarded > 0) {
4835: return PARTIALLY_CORRECT;
4836: } elsif ($awarded<1) {
4837: return INCORRECT;
4838: }
4839: return CORRECT;
1.69 bowersj2 4840: }
4841:
1.343 albertel 4842: # If it's WRONG... and not open
4843: if ( ($completionStatus == INCORRECT ||
4844: $completionStatus == INCORRECT_BY_OVERRIDE)
4845: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
4846: return INCORRECT;
4847: }
4848:
1.69 bowersj2 4849: if ($completionStatus == ATTEMPTED) {
4850: return ATTEMPTED;
1.53 bowersj2 4851: }
4852:
4853: # If it's EXCUSED, then return that no matter what
4854: if ($completionStatus == EXCUSED) {
4855: return EXCUSED;
1.51 bowersj2 4856: }
4857:
1.53 bowersj2 4858: if ($dateStatus == NOTHING_SET) {
4859: return NOTHING_SET;
1.51 bowersj2 4860: }
4861:
1.69 bowersj2 4862: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
4863: # by 4 matrix (date statuses).
1.51 bowersj2 4864:
1.54 bowersj2 4865: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 4866: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 4867: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 4868: }
4869:
1.53 bowersj2 4870: if ($dateStatus == ANSWER_OPEN) {
4871: return ANSWER_OPEN;
1.51 bowersj2 4872: }
4873:
4874: # Now: (incorrect, incorrect_override, not_attempted) x
4875: # (open_later), (open)
4876:
1.53 bowersj2 4877: if ($dateStatus == OPEN_LATER) {
4878: return OPEN_LATER;
1.51 bowersj2 4879: }
4880:
4881: # If it's WRONG...
1.53 bowersj2 4882: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 4883: # and there are TRIES LEFT:
1.79 bowersj2 4884: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 4885: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 4886: }
1.185 bowersj2 4887: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 4888: }
4889:
4890: # Otherwise, it's untried and open
1.53 bowersj2 4891: return OPEN;
1.224 bowersj2 4892: }
4893:
1.432 raeburn 4894: sub check_for_slot {
4895: my $self = shift;
4896: my $part = shift;
4897: my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
4898: if (($use_slots ne '') && ($use_slots !~ /^\s*no\s*$/i)) {
4899: my @slots = (split(/:/,$availablestudent),split(/:/,$available));
4900: my $cid=$env{'request.course.id'};
4901: my $cdom=$env{'course.'.$cid.'.domain'};
4902: my $cnum=$env{'course.'.$cid.'.num'};
4903: my $now = time;
4904: if (@slots > 0) {
4905: my %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
4906: if (&Apache::lonnet::error(%slots)) {
4907: return (UNKNOWN);
4908: }
4909: my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots);
4910: my ($checkedin,$checkedinslot);
4911: foreach my $slot_name (@sorted_slots) {
4912: next if (!defined($slots{$slot_name}) ||
4913: !ref($slots{$slot_name}));
4914: my $end = $slots{$slot_name}->{'endtime'};
4915: my $start = $slots{$slot_name}->{'starttime'};
4916: my $ip = $slots{$slot_name}->{'ip'};
4917: if ($self->simpleStatus() == OPEN) {
4918: my $startreserve = $slots{$slot_name}->{'startreserve'};
4919: my @proctors;
4920: if ($slots{$slot_name}->{'proctor'} ne '') {
4921: @proctors = split(',',$slots{$slot_name}->{'proctor'});
4922: }
4923: if ($end > $now) {
4924: ($checkedin,$checkedinslot) = $self->checkedin();
4925: if ($startreserve < $now) {
4926: if ($start > $now) {
4927: return (RESERVED_LATER,$start,$slot_name);
4928: } else {
4929: if ($ip ne '') {
4930: if (!&Apache::loncommon::check_ip_acc($ip)) {
4931: return (RESERVED_LOCATION,$ip,$slot_name);
4932: }
4933: }
4934: if (@proctors > 0) {
4935: unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
4936: ($checkedinslot eq $slot_name)) {
4937: return (NEEDS_CHECKIN,undef,$slot_name);
4938: }
4939: }
4940: return (RESERVED,$end,$slot_name);
4941: }
4942: } else {
4943: if ($start > $now) {
4944: return (RESERVABLE,$startreserve,$slot_name);
4945: }
4946: }
4947: }
4948: }
4949: }
4950: my ($is_correct,$got_grade);
4951: if ($self->is_task()) {
4952: my $taskstatus = $self->taskstatus();
4953: $is_correct = (($taskstatus eq 'pass') ||
4954: ($self->solved() =~ /^correct_/));
4955: $got_grade = ($self->solved() =~ /^(?:pass|fail)$/);
4956: } else {
4957: $got_grade = 1;
4958: $is_correct = ($self->solved() =~ /^correct_/);
4959: }
4960: ($checkedin,$checkedinslot) = $self->checkedin();
4961: if ($checkedin) {
4962: if (!$got_grade) {
4963: return (WAITING_FOR_GRADE);
4964: } elsif ($is_correct) {
4965: return (CORRECT);
4966: }
4967: }
4968: return(NOT_IN_A_SLOT);
4969: } else {
4970: if (!$future_slots_checked) {
4971: $future_slots = &get_future_slots($cdom,$cnum,$now);
4972: $future_slots_checked = 1;
4973: }
4974: if ($future_slots) {
4975: return(NOT_IN_A_SLOT);
4976: }
4977: return(NOTRESERVABLE);
4978: }
4979: }
4980: return;
4981: }
4982:
4983: sub get_future_slots {
4984: my ($cdom,$cnum,$now) = @_;
4985: my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
4986: my $future_slots = 0;
4987: foreach my $slot (keys(%slots)) {
4988: if (($slots{$slot}->{'starttime'} > $now) &&
4989: ($slots{$slot}->{'endtime'} > $now)) {
4990: $future_slots ++;
4991: }
4992: }
4993: return $future_slots;
4994: }
4995:
1.224 bowersj2 4996: sub CLOSED { return 23; }
4997: sub ERROR { return 24; }
4998:
4999: =pod
5000:
5001: B<Simple Status>
5002:
5003: Convenience method B<simpleStatus> provides a "simple status" for the resource.
5004: "Simple status" corresponds to "which icon is shown on the
5005: Navmaps". There are six "simple" statuses:
5006:
5007: =over 4
5008:
5009: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
5010:
5011: =item * B<OPEN>: The problem is open and unattempted.
5012:
5013: =item * B<CORRECT>: The problem is correct for any reason.
5014:
5015: =item * B<INCORRECT>: The problem is incorrect and can still be
5016: completed successfully.
5017:
5018: =item * B<ATTEMPTED>: The problem has been attempted, but the student
5019: does not know if they are correct. (The ellipsis icon.)
5020:
5021: =item * B<ERROR>: There is an error retrieving information about this
5022: problem.
5023:
5024: =back
5025:
5026: =cut
5027:
5028: # This hash maps the composite status to this simple status, and
5029: # can be used directly, if you like
5030: my %compositeToSimple =
5031: (
5032: NETWORK_FAILURE() => ERROR,
5033: NOTHING_SET() => CLOSED,
5034: CORRECT() => CORRECT,
1.332 albertel 5035: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
1.224 bowersj2 5036: EXCUSED() => CORRECT,
5037: PAST_DUE_NO_ANSWER() => INCORRECT,
5038: PAST_DUE_ANSWER_LATER() => INCORRECT,
5039: ANSWER_OPEN() => INCORRECT,
5040: OPEN_LATER() => CLOSED,
5041: TRIES_LEFT() => OPEN,
5042: INCORRECT() => INCORRECT,
5043: OPEN() => OPEN,
5044: ATTEMPTED() => ATTEMPTED,
5045: ANSWER_SUBMITTED() => ATTEMPTED
5046: );
5047:
5048: sub simpleStatus {
5049: my $self = shift;
5050: my $part = shift;
5051: my $status = $self->status($part);
5052: return $compositeToSimple{$status};
1.225 bowersj2 5053: }
5054:
5055: =pod
5056:
5057: B<simpleStatusCount> will return an array reference containing, in
5058: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
5059: and ERROR parts the given problem has.
5060:
5061: =cut
5062:
5063: # This maps the status to the slot we want to increment
5064: my %statusToSlotMap =
5065: (
5066: OPEN() => 0,
5067: CLOSED() => 1,
5068: CORRECT() => 2,
5069: INCORRECT() => 3,
5070: ATTEMPTED() => 4,
5071: ERROR() => 5
5072: );
5073:
5074: sub statusToSlot { return $statusToSlotMap{shift()}; }
5075:
5076: sub simpleStatusCount {
5077: my $self = shift;
5078:
5079: my @counts = (0, 0, 0, 0, 0, 0, 0);
5080: foreach my $part (@{$self->parts()}) {
5081: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
5082: }
5083:
5084: return \@counts;
1.191 bowersj2 5085: }
5086:
5087: =pod
5088:
5089: B<Completable>
5090:
5091: The completable method represents the concept of I<whether the student can
5092: currently do the problem>. If the student can do the problem, which means
5093: that it is open, there are tries left, and if the problem is manually graded
5094: or the grade is suppressed via problemstatus, the student has not tried it
5095: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
5096: either the student has tried it and there is no feedback, or that for
5097: some reason it is no longer completable (not open yet, successfully completed,
5098: out of tries, etc.). As an example, this is used as the filter for the
5099: "Uncompleted Homework" option for the nav maps.
5100:
5101: If this does not quite meet your needs, do not fiddle with it (unless you are
5102: fixing it to better match the student's conception of "completable" because
5103: it's broken somehow)... make a new method.
5104:
5105: =cut
5106:
5107: sub completable {
5108: my $self = shift;
5109: if (!$self->is_problem()) { return 0; }
5110: my $partCount = $self->countParts();
5111:
5112: foreach my $part (@{$self->parts()}) {
5113: if ($part eq '0' && $partCount != 1) { next; }
5114: my $status = $self->status($part);
5115: # "If any of the parts are open, or have tries left (implies open),
5116: # and it is not "attempted" (manually graded problem), it is
5117: # not "complete"
1.216 bowersj2 5118: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
5119: $status == ANSWER_SUBMITTED() ) {
5120: # did this part already, as well as we can
5121: next;
5122: }
5123: if ($status == OPEN() || $status == TRIES_LEFT()) {
5124: return 1;
5125: }
1.191 bowersj2 5126: }
5127:
5128: # If all the parts were complete, so was this problem.
1.216 bowersj2 5129: return 0;
1.51 bowersj2 5130: }
5131:
5132: =pod
5133:
5134: =head2 Resource/Nav Map Navigation
5135:
5136: =over 4
5137:
1.174 albertel 5138: =item * B<getNext>():
5139:
5140: Retreive an array of the possible next resources after this
5141: one. Always returns an array, even in the one- or zero-element case.
5142:
5143: =item * B<getPrevious>():
1.85 bowersj2 5144:
1.174 albertel 5145: Retreive an array of the possible previous resources from this
5146: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 5147:
5148: =cut
5149:
5150: sub getNext {
5151: my $self = shift;
5152: my @branches;
5153: my $to = $self->to();
1.85 bowersj2 5154: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 5155: my $choice = $self->{NAV_MAP}->getById($branch);
1.342 albertel 5156: #if (!$choice->condition()) { next; }
1.51 bowersj2 5157: my $next = $choice->goesto();
5158: $next = $self->{NAV_MAP}->getById($next);
5159:
1.131 bowersj2 5160: push @branches, $next;
1.85 bowersj2 5161: }
5162: return \@branches;
5163: }
5164:
5165: sub getPrevious {
5166: my $self = shift;
5167: my @branches;
5168: my $from = $self->from();
5169: foreach my $branch ( split /,/, $from) {
5170: my $choice = $self->{NAV_MAP}->getById($branch);
5171: my $prev = $choice->comesfrom();
5172: $prev = $self->{NAV_MAP}->getById($prev);
5173:
1.131 bowersj2 5174: push @branches, $prev;
1.51 bowersj2 5175: }
5176: return \@branches;
1.131 bowersj2 5177: }
5178:
5179: sub browsePriv {
5180: my $self = shift;
5181: if (defined($self->{BROWSE_PRIV})) {
5182: return $self->{BROWSE_PRIV};
5183: }
5184:
1.311 albertel 5185: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
5186: $self->symb());
1.51 bowersj2 5187: }
5188:
5189: =pod
1.2 www 5190:
1.51 bowersj2 5191: =back
1.2 www 5192:
1.51 bowersj2 5193: =cut
1.2 www 5194:
1.51 bowersj2 5195: 1;
1.2 www 5196:
1.51 bowersj2 5197: __END__
1.2 www 5198:
5199:
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