Annotation of loncom/interface/lonnavmaps.pm, revision 1.509.2.8
1.481 foxr 1: # The LearningOnline Network with CAPA
1.2 www 2: # Navigate Maps Handler
1.1 www 3: #
1.509.2.8! raeburn 4: # $Id: lonnavmaps.pm,v 1.509.2.7 2018/09/04 19:48:58 raeburn 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:
1.493 raeburn 167: =item * B<map_no_edit_link>:
168:
169: If true, the title of the folder or page will not be followed by an
170: icon/link to direct editing of a folder or composite page, originally
171: added via the Course Editor.
172:
1.416 jms 173: =back
174:
175: =item * B<Apache::lonnavmaps::communication_status>:
176:
177: Whether there is discussion on the resource, email for the user, or
178: (lumped in here) perl errors in the execution of the problem. This is
179: the second column in the main nav map.
180:
181: =item * B<Apache::lonnavmaps::quick_status>:
182:
183: An icon for the status of a problem, with five possible states:
184: Correct, incorrect, open, awaiting grading (for a problem where the
185: computer's grade is suppressed, or the computer can't grade, like
186: essay problem), or none (not open yet, not a problem). The
187: third column of the standard navmap.
188:
189: =item * B<Apache::lonnavmaps::long_status>:
190:
191: A text readout of the details of the current status of the problem,
192: such as "Due in 22 hours". The fourth column of the standard navmap.
193:
194: =item * B<Apache::lonnavmaps::part_status_summary>:
195:
196: A text readout summarizing the status of the problem. If it is a
197: single part problem, will display "Correct", "Incorrect",
198: "Not yet open", "Open", "Attempted", or "Error". If there are
199: multiple parts, this will output a string that in HTML will show a
200: status of how many parts are in each status, in color coding, trying
201: to match the colors of the icons within reason.
1.1 www 202:
1.416 jms 203: Note this only makes sense if you are I<not> showing parts. If
204: C<showParts> is true (see below), this column will not output
205: anything.
1.2 www 206:
1.416 jms 207: =back
1.133 bowersj2 208:
1.416 jms 209: If you add any others please be sure to document them here.
1.133 bowersj2 210:
1.416 jms 211: An example of a column renderer that will show the ID number of a
212: resource, along with the part name if any:
1.140 bowersj2 213:
1.416 jms 214: sub {
215: my ($resource, $part, $params) = @_;
216: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
217: return '<td>' . $resource->{ID} . '</td>';
218: }
1.135 bowersj2 219:
1.416 jms 220: Note these functions are responsible for the TD tags, which allow them
221: to override vertical and horizontal alignment, etc.
1.133 bowersj2 222:
1.416 jms 223: =head2 Parameters
1.130 www 224:
1.416 jms 225: Minimally, you should be
226: able to get away with just using 'cols' (to specify the columns
227: shown), 'url' (necessary for the folders to link to the current screen
228: correctly), and possibly 'queryString' if your app calls for it. In
229: that case, maintaining the state of the folders will be done
230: automatically.
1.268 albertel 231:
1.416 jms 232: =over 4
1.268 albertel 233:
1.483 raeburn 234: =item * B<iterator>: default: constructs one from %env
1.51 bowersj2 235:
1.416 jms 236: A reference to a fresh ::iterator to use from the navmaps. The
237: rendering will reflect the options passed to the iterator, so you can
238: use that to just render a certain part of the course, if you like. If
239: one is not passed, the renderer will attempt to construct one from
240: env{'form.filter'} and env{'form.condition'} information, plus the
241: 'iterator_map' parameter if any.
1.51 bowersj2 242:
1.416 jms 243: =item * B<iterator_map>: default: not used
1.51 bowersj2 244:
1.416 jms 245: If you are letting the renderer do the iterator handling, you can
246: instruct the renderer to render only a particular map by passing it
247: the source of the map you want to process, like
248: '/res/103/jerf/navmap.course.sequence'.
1.51 bowersj2 249:
1.416 jms 250: =item * B<include_top_level_map>: default: false
1.51 bowersj2 251:
1.416 jms 252: If you need to include the top level map (meaning the course) in the
253: rendered output set this to true
1.51 bowersj2 254:
1.416 jms 255: =item * B<navmap>: default: constructs one from %env
1.51 bowersj2 256:
1.416 jms 257: A reference to a navmap, used only if an iterator is not passed in. If
258: this is necessary to make an iterator but it is not passed in, a new
259: one will be constructed based on env info. This is useful to do basic
260: error checking before passing it off to render.
1.51 bowersj2 261:
1.416 jms 262: =item * B<r>: default: must be passed in
1.53 bowersj2 263:
1.416 jms 264: The standard Apache response object. This must be passed to the
265: renderer or the course hash will be locked.
1.53 bowersj2 266:
1.416 jms 267: =item * B<cols>: default: empty (useless)
1.407 raeburn 268:
1.416 jms 269: An array reference
1.53 bowersj2 270:
1.416 jms 271: =item * B<showParts>:default true
1.115 bowersj2 272:
1.416 jms 273: A flag. If true, a line for the resource itself, and a line
274: for each part will be displayed. If not, only one line for each
275: resource will be displayed.
1.115 bowersj2 276:
1.416 jms 277: =item * B<condenseParts>: default true
1.115 bowersj2 278:
1.416 jms 279: A flag. If true, if all parts of the problem have the same
280: status and that status is Nothing Set, Correct, or Network Failure,
281: then only one line will be displayed for that resource anyhow. If no,
282: all parts will always be displayed. If showParts is 0, this is
283: ignored.
1.115 bowersj2 284:
1.416 jms 285: =item * B<jumpCount>: default: determined from %env
1.115 bowersj2 286:
1.416 jms 287: A string identifying the URL to place the anchor 'curloc' at.
288: It is the responsibility of the renderer user to
289: ensure that the #curloc is in the URL. By default, determined through
290: the use of the env{} 'jump' information, and should normally "just
291: work" correctly.
1.177 www 292:
1.416 jms 293: =item * B<here>: default: empty string
1.68 bowersj2 294:
1.416 jms 295: A Symb identifying where to place the 'here' marker. The empty
296: string means no marker.
1.73 bowersj2 297:
1.416 jms 298: =item * B<indentString>: default: 25 pixel whitespace image
1.347 www 299:
1.416 jms 300: A string identifying the indentation string to use.
1.347 www 301:
1.416 jms 302: =item * B<queryString>: default: empty
1.346 foxr 303:
1.416 jms 304: A string which will be prepended to the query string used when the
305: folders are opened or closed. You can use this to pass
306: application-specific values.
1.73 bowersj2 307:
1.416 jms 308: =item * B<url>: default: none
1.73 bowersj2 309:
1.416 jms 310: The url the folders will link to, which should be the current
311: page. Required if the resource info column is shown, and you
312: are allowing the user to open and close folders.
1.73 bowersj2 313:
1.416 jms 314: =item * B<currentJumpIndex>: default: no jumping
1.73 bowersj2 315:
1.416 jms 316: Describes the currently-open row number to cause the browser to jump
317: to, because the user just opened that folder. By default, pulled from
318: the Jump information in the env{'form.*'}.
1.73 bowersj2 319:
1.416 jms 320: =item * B<printKey>: default: false
1.101 bowersj2 321:
1.416 jms 322: If true, print the key that appears on the top of the standard
323: navmaps.
1.73 bowersj2 324:
1.416 jms 325: =item * B<printCloseAll>: default: true
1.73 bowersj2 326:
1.416 jms 327: If true, print the "Close all folders" or "open all folders"
328: links.
1.403 albertel 329:
1.416 jms 330: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.346 foxr 331:
1.416 jms 332: A function that takes the resource object as its only parameter and
333: returns a true or false value. If true, the resource is displayed. If
334: false, it is simply skipped in the display.
1.346 foxr 335:
1.416 jms 336: =item * B<suppressEmptySequences>: default: false
1.346 foxr 337:
1.416 jms 338: If you're using a filter function, and displaying sequences to orient
339: the user, then frequently some sequences will be empty. Setting this to
340: true will cause those sequences not to display, so as not to confuse the
341: user into thinking that if the sequence is there there should be things
342: under it; for example, see the "Show Uncompleted Homework" view on the
343: B<NAV> screen.
1.73 bowersj2 344:
1.416 jms 345: =item * B<suppressNavmaps>: default: false
1.53 bowersj2 346:
1.416 jms 347: If true, will not display Navigate Content resources.
1.51 bowersj2 348:
1.416 jms 349: =back
1.133 bowersj2 350:
1.416 jms 351: =head2 Additional Info
1.174 albertel 352:
1.416 jms 353: In addition to the parameters you can pass to the renderer, which will
354: be passed through unchange to the column renderers, the renderer will
355: generate the following information which your renderer may find
356: useful:
1.174 albertel 357:
1.416 jms 358: =over 4
1.174 albertel 359:
1.416 jms 360: =item * B<counter>:
1.133 bowersj2 361:
1.416 jms 362: Contains the number of rows printed. Useful after calling the render
363: function, as you can detect whether anything was printed at all.
1.216 bowersj2 364:
1.416 jms 365: =item * B<isNewBranch>:
1.216 bowersj2 366:
1.416 jms 367: Useful for renderers: If this resource is currently the first resource
368: of a new branch, this will be true. The Resource column (leftmost in the
369: navmaps screen) uses this to display the "new branch" icon
1.216 bowersj2 370:
1.416 jms 371: =back
1.216 bowersj2 372:
1.416 jms 373: =cut
1.216 bowersj2 374:
375:
1.416 jms 376: =head1 SUBROUTINES
1.216 bowersj2 377:
1.416 jms 378: =over
1.216 bowersj2 379:
1.416 jms 380: =item update()
1.133 bowersj2 381:
1.416 jms 382: =item addToFilter()
1.133 bowersj2 383:
1.416 jms 384: Convenience functions: Returns a string that adds or subtracts
385: the second argument from the first hash, appropriate for the
386: query string that determines which folders to recurse on
1.174 albertel 387:
1.416 jms 388: =item removeFromFilter()
1.51 bowersj2 389:
1.416 jms 390: =item getLinkForResource()
1.51 bowersj2 391:
1.416 jms 392: Convenience function: Given a stack returned from getStack on the iterator,
393: return the correct src() value.
1.174 albertel 394:
1.416 jms 395: =item getDescription()
1.174 albertel 396:
1.416 jms 397: Convenience function: This separates the logic of how to create
398: the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
399: etc.) into a separate function. It takes a resource object as the
400: first parameter, and the part number of the resource as the second.
401: It's basically a big switch statement on the status of the resource.
1.174 albertel 402:
1.416 jms 403: =item dueInLessThan24Hours()
1.216 bowersj2 404:
1.416 jms 405: Convenience function, so others can use it: Is the problem due in less than 24 hours, and still can be done?
1.51 bowersj2 406:
1.416 jms 407: =item lastTry()
1.51 bowersj2 408:
1.416 jms 409: Convenience function, so others can use it: Is there only one try remaining for the
410: part, with more than one try to begin with, not due yet and still can be done?
1.51 bowersj2 411:
1.416 jms 412: =item advancedUser()
1.51 bowersj2 413:
1.416 jms 414: This puts a human-readable name on the env variable.
1.51 bowersj2 415:
1.416 jms 416: =item timeToHumanString()
1.51 bowersj2 417:
1.416 jms 418: timeToHumanString takes a time number and converts it to a
419: human-readable representation, meant to be used in the following
420: manner:
1.174 albertel 421:
1.416 jms 422: =over 4
1.51 bowersj2 423:
1.416 jms 424: =item * print "Due $timestring"
1.133 bowersj2 425:
1.416 jms 426: =item * print "Open $timestring"
1.133 bowersj2 427:
1.416 jms 428: =item * print "Answer available $timestring"
1.144 bowersj2 429:
1.133 bowersj2 430: =back
1.51 bowersj2 431:
1.416 jms 432: Very, very, very, VERY English-only... goodness help a localizer on
433: this func...
1.174 albertel 434:
1.417 jms 435: =item resource()
1.174 albertel 436:
1.417 jms 437: returns 0
1.51 bowersj2 438:
1.417 jms 439: =item communication_status()
1.51 bowersj2 440:
1.417 jms 441: returns 1
1.174 albertel 442:
1.417 jms 443: =item quick_status()
1.51 bowersj2 444:
1.417 jms 445: returns 2
1.225 bowersj2 446:
1.417 jms 447: =item long_status()
1.225 bowersj2 448:
1.417 jms 449: returns 3
1.225 bowersj2 450:
1.417 jms 451: =item part_status_summary()
1.51 bowersj2 452:
1.417 jms 453: returns 4
1.51 bowersj2 454:
1.417 jms 455: =item render_resource()
1.51 bowersj2 456:
1.417 jms 457: =item render_communication_status()
1.51 bowersj2 458:
1.417 jms 459: =item render_quick_status()
460:
461: =item render_long_status()
462:
463: =item render_parts_summary_status()
464:
465: =item setDefault()
466:
467: =item cmp_title()
468:
469: =item render()
470:
471: =item add_linkitem()
472:
1.476 raeburn 473: =item show_linkitems_toolbar()
1.130 www 474:
1.416 jms 475: =back
1.115 bowersj2 476:
1.416 jms 477: =cut
1.140 bowersj2 478:
1.416 jms 479: package Apache::lonnavmaps;
1.51 bowersj2 480:
1.416 jms 481: use strict;
482: use GDBM_File;
483: use Apache::loncommon();
484: use Apache::lonenc();
485: use Apache::lonlocal;
486: use Apache::lonnet;
1.465 foxr 487: use Apache::lonmap;
1.443 foxr 488:
1.416 jms 489: use POSIX qw (floor strftime);
490: use Time::HiRes qw( gettimeofday tv_interval );
491: use LONCAPA;
492: use DateTime();
1.486 raeburn 493: use HTML::Entities;
1.465 foxr 494:
495: # For debugging
496:
1.499 raeburn 497: #use Data::Dumper;
1.465 foxr 498:
499:
1.416 jms 500: # symbolic constants
501: sub SYMB { return 1; }
502: sub URL { return 2; }
503: sub NOTHING { return 3; }
1.174 albertel 504:
1.416 jms 505: # Some data
1.174 albertel 506:
1.416 jms 507: my $resObj = "Apache::lonnavmaps::resource";
1.174 albertel 508:
1.443 foxr 509: # Keep these mappings in sync with lonquickgrades, which usesthe colors
1.416 jms 510: # instead of the icons.
511: my %statusIconMap =
512: (
513: $resObj->CLOSED => '',
514: $resObj->OPEN => 'navmap.open.gif',
515: $resObj->CORRECT => 'navmap.correct.gif',
516: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
517: $resObj->INCORRECT => 'navmap.wrong.gif',
518: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
519: $resObj->ERROR => ''
520: );
1.401 albertel 521:
1.438 wenzelju 522: my %iconAltTags = #texthash does not work here
1.439 wenzelju 523: ( 'navmap.correct.gif' => 'Correct',
524: 'navmap.wrong.gif' => 'Incorrect',
1.462 christia 525: 'navmap.open.gif' => 'Is Open',
1.439 wenzelju 526: 'navmap.partial.gif' => 'Partially Correct',
527: 'navmap.ellipsis.gif' => 'Attempted',
528: );
1.401 albertel 529:
1.416 jms 530: # Defines a status->color mapping, null string means don't color
531: my %colormap =
532: ( $resObj->NETWORK_FAILURE => '',
533: $resObj->CORRECT => '',
534: $resObj->EXCUSED => '#3333FF',
535: $resObj->PAST_DUE_ANSWER_LATER => '',
536: $resObj->PAST_DUE_NO_ANSWER => '',
537: $resObj->ANSWER_OPEN => '#006600',
538: $resObj->OPEN_LATER => '',
539: $resObj->TRIES_LEFT => '',
540: $resObj->INCORRECT => '',
541: $resObj->OPEN => '',
542: $resObj->NOTHING_SET => '',
543: $resObj->ATTEMPTED => '',
1.450 raeburn 544: $resObj->CREDIT_ATTEMPTED => '',
1.416 jms 545: $resObj->ANSWER_SUBMITTED => '',
546: $resObj->PARTIALLY_CORRECT => '#006600'
547: );
548: # And a special case in the nav map; what to do when the assignment
549: # is not yet done and due in less than 24 hours
550: my $hurryUpColor = "#FF0000";
1.174 albertel 551:
1.416 jms 552: sub addToFilter {
553: my $hashIn = shift;
554: my $addition = shift;
555: my %hash = %$hashIn;
556: $hash{$addition} = 1;
1.174 albertel 557:
1.416 jms 558: return join (",", keys(%hash));
559: }
1.174 albertel 560:
1.416 jms 561: sub removeFromFilter {
562: my $hashIn = shift;
563: my $subtraction = shift;
564: my %hash = %$hashIn;
1.174 albertel 565:
1.416 jms 566: delete $hash{$subtraction};
567: return join(",", keys(%hash));
568: }
1.174 albertel 569:
1.416 jms 570: sub getLinkForResource {
571: my $stack = shift;
572: my $res;
1.174 albertel 573:
1.416 jms 574: # Check to see if there are any pages in the stack
575: foreach $res (@$stack) {
576: if (defined($res)) {
577: my $anchor;
578: if ($res->is_page()) {
579: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
580: $anchor=&escape($anchor->shown_symb());
581: return ($res->link(),$res->shown_symb(),$anchor);
582: }
583: # in case folder was skipped over as "only sequence"
584: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
585: if ($map=~/\.page$/) {
586: my $url=&Apache::lonnet::clutter($map);
1.437 foxr 587: $anchor=&escape($res->shown_symb());
1.416 jms 588: return ($url,$res->shown_symb(),$anchor);
589: }
590: }
591: }
1.174 albertel 592:
1.416 jms 593: # Failing that, return the src of the last resource that is defined
594: # (when we first recurse on a map, it puts an undefined resource
595: # on the bottom because $self->{HERE} isn't defined yet, and we
596: # want the src for the map anyhow)
597: foreach my $item (@$stack) {
598: if (defined($item)) { $res = $item; }
599: }
1.174 albertel 600:
1.416 jms 601: if ($res) {
602: return ($res->link(),$res->shown_symb());
603: }
604: return;
605: }
1.174 albertel 606:
1.417 jms 607:
1.140 bowersj2 608:
1.416 jms 609: sub getDescription {
610: my $res = shift;
611: my $part = shift;
612: my $status = $res->status($part);
1.92 bowersj2 613:
1.416 jms 614: my $open = $res->opendate($part);
615: my $due = $res->duedate($part);
616: my $answer = $res->answerdate($part);
1.164 bowersj2 617:
1.416 jms 618: if ($status == $res->NETWORK_FAILURE) {
619: return &mt("Having technical difficulties; please check status later");
620: }
621: if ($status == $res->NOTHING_SET) {
1.494 raeburn 622: return &Apache::lonhtmlcommon::direct_parm_link(&mt('Not currently assigned'),$res->symb(),'opendate',$part);
1.416 jms 623: }
624: if ($status == $res->OPEN_LATER) {
1.467 www 625: return &mt("Open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($open,'start'),$res->symb(),'opendate',$part));
1.416 jms 626: }
1.509 raeburn 627: my $slotinfo;
1.432 raeburn 628: if ($res->simpleStatus($part) == $res->OPEN) {
629: unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
630: my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
1.509 raeburn 631: my $slotmsg;
1.432 raeburn 632: if ($slot_status == $res->UNKNOWN) {
1.509 raeburn 633: $slotmsg = &mt('Reservation status unknown');
1.432 raeburn 634: } elsif ($slot_status == $res->RESERVED) {
1.509 raeburn 635: $slotmsg = &mt('Reserved - ends [_1]',
1.433 bisitz 636: timeToHumanString($slot_time,'end'));
1.432 raeburn 637: } elsif ($slot_status == $res->RESERVED_LOCATION) {
1.509 raeburn 638: $slotmsg = &mt('Reserved - specific location(s) - ends [_1]',
1.433 bisitz 639: timeToHumanString($slot_time,'end'));
1.432 raeburn 640: } elsif ($slot_status == $res->RESERVED_LATER) {
1.509 raeburn 641: $slotmsg = &mt('Reserved - next open [_1]',
1.433 bisitz 642: timeToHumanString($slot_time,'start'));
1.432 raeburn 643: } elsif ($slot_status == $res->RESERVABLE) {
1.509 raeburn 644: $slotmsg = &mt('Reservable, reservations close [_1]',
1.433 bisitz 645: timeToHumanString($slot_time,'end'));
1.509.2.6 raeburn 646: } elsif ($slot_status == $res->NEEDS_CHECKIN) {
647: $slotmsg = &mt('Reserved, check-in needed - ends [_1]',
648: timeToHumanString($slot_time,'end'));
1.432 raeburn 649: } elsif ($slot_status == $res->RESERVABLE_LATER) {
1.509 raeburn 650: $slotmsg = &mt('Reservable, reservations open [_1]',
1.433 bisitz 651: timeToHumanString($slot_time,'start'));
1.432 raeburn 652: } elsif ($slot_status == $res->NOT_IN_A_SLOT) {
1.509 raeburn 653: $slotmsg = &mt('Reserve a time/place to work');
1.432 raeburn 654: } elsif ($slot_status == $res->NOTRESERVABLE) {
1.509 raeburn 655: $slotmsg = &mt('Reservation not available');
1.432 raeburn 656: } elsif ($slot_status == $res->WAITING_FOR_GRADE) {
1.509 raeburn 657: $slotmsg = &mt('Submission in grading queue');
658: }
659: if ($slotmsg) {
660: if ($res->is_task() || !$due) {
661: return $slotmsg;
662: }
663: $slotinfo = (' ' x 2).'('.$slotmsg.')';
1.432 raeburn 664: }
665: }
666: }
1.416 jms 667: if ($status == $res->OPEN) {
668: if ($due) {
669: if ($res->is_practice()) {
1.509 raeburn 670: return &mt("Closes [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'duedate',$part)).$slotinfo;
1.416 jms 671: } else {
1.509 raeburn 672: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)).$slotinfo;
1.416 jms 673: }
674: } else {
1.509 raeburn 675: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Open, no due date"),$res->symb(),'duedate',$part).$slotinfo;
1.416 jms 676: }
677: }
678: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.467 www 679: return &mt("Answer open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($answer,'start'),$res->symb(),'answerdate',$part));
1.416 jms 680: }
681: if ($status == $res->PAST_DUE_NO_ANSWER) {
682: if ($res->is_practice()) {
1.467 www 683: return &mt("Closed [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'answerdate,duedate',$part));
1.416 jms 684: } else {
1.467 www 685: return &mt("Was due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'answerdate,duedate',$part));
1.416 jms 686: }
687: }
688: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
689: && $res->handgrade($part) ne 'yes') {
1.455 www 690: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Answer available"),$res->symb(),'answerdate,duedate',$part);
1.416 jms 691: }
692: if ($status == $res->EXCUSED) {
693: return &mt("Excused by instructor");
694: }
695: if ($status == $res->ATTEMPTED) {
1.444 raeburn 696: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
697: return &mt("Survey submission recorded");
698: } else {
699: return &mt("Answer submitted, not yet graded");
700: }
1.416 jms 701: }
1.450 raeburn 702: if ($status == $res->CREDIT_ATTEMPTED) {
703: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
704: return &mt("Credit for survey submission");
705: }
706: }
1.416 jms 707: if ($status == $res->TRIES_LEFT) {
708: my $tries = $res->tries($part);
709: my $maxtries = $res->maxtries($part);
710: my $triesString = "";
711: if ($tries && $maxtries) {
1.488 bisitz 712: $triesString = '<span class="LC_fontsize_medium"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></span>';
1.416 jms 713: if ($maxtries > 1 && $maxtries - $tries == 1) {
714: $triesString = "<b>$triesString</b>";
715: }
716: }
717: if ($due) {
1.467 www 718: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)) .
1.416 jms 719: " $triesString";
720: } else {
1.455 www 721: return &Apache::lonhtmlcommon::direct_parm_link(&mt("No due date"),$res->symb(),'duedate',$part)." $triesString";
1.416 jms 722: }
723: }
724: if ($status == $res->ANSWER_SUBMITTED) {
725: return &mt('Answer submitted');
726: }
727: }
1.92 bowersj2 728:
1.51 bowersj2 729:
1.416 jms 730: sub dueInLessThan24Hours {
731: my $res = shift;
732: my $part = shift;
733: my $status = $res->status($part);
1.55 bowersj2 734:
1.416 jms 735: return ($status == $res->OPEN() ||
736: $status == $res->TRIES_LEFT()) &&
737: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
738: $res->duedate($part) > time();
739: }
1.84 bowersj2 740:
1.417 jms 741:
1.416 jms 742: sub lastTry {
743: my $res = shift;
744: my $part = shift;
1.115 bowersj2 745:
1.416 jms 746: my $tries = $res->tries($part);
747: my $maxtries = $res->maxtries($part);
748: return $tries && $maxtries && $maxtries > 1 &&
749: $maxtries - $tries == 1 && $res->duedate($part) &&
750: $res->duedate($part) > time();
751: }
1.55 bowersj2 752:
1.51 bowersj2 753:
1.416 jms 754: sub advancedUser {
755: return $env{'request.role.adv'};
756: }
1.51 bowersj2 757:
1.416 jms 758: sub timeToHumanString {
759: my ($time,$type,$format) = @_;
1.153 bowersj2 760:
1.416 jms 761: # zero, '0' and blank are bad times
762: if (!$time) {
763: return &mt('never');
764: }
765: unless (&Apache::lonlocal::current_language()=~/^en/) {
766: return &Apache::lonlocal::locallocaltime($time);
767: }
768: my $now = time();
1.174 albertel 769:
1.416 jms 770: # Positive = future
771: my $delta = $time - $now;
1.190 bowersj2 772:
1.416 jms 773: my $minute = 60;
774: my $hour = 60 * $minute;
775: my $day = 24 * $hour;
776: my $week = 7 * $day;
777: my $inPast = 0;
1.190 bowersj2 778:
1.416 jms 779: # Logic in comments:
780: # Is it now? (extremely unlikely)
781: if ( $delta == 0 ) {
782: return "this instant";
783: }
1.174 albertel 784:
1.416 jms 785: if ($delta < 0) {
786: $inPast = 1;
787: $delta = -$delta;
788: }
1.143 bowersj2 789:
1.416 jms 790: if ( $delta > 0 ) {
1.51 bowersj2 791:
1.416 jms 792: my $tense = $inPast ? " ago" : "";
793: my $prefix = $inPast ? "" : "in ";
794:
795: # Less than a minute
796: if ( $delta < $minute ) {
797: if ($delta == 1) { return "${prefix}1 second$tense"; }
798: return "$prefix$delta seconds$tense";
799: }
1.51 bowersj2 800:
1.416 jms 801: # Less than an hour
802: if ( $delta < $hour ) {
1.464 raeburn 803: # If so, use minutes; or minutes, seconds (if format requires)
1.416 jms 804: my $minutes = floor($delta / 60);
1.464 raeburn 805: if (($format ne '') && ($format =~ /\%(T|S)/)) {
806: my $display;
807: if ($minutes == 1) {
808: $display = "${prefix}1 minute";
809: } else {
810: $display = "$prefix$minutes minutes";
811: }
812: my $seconds = $delta % $minute;
813: if ($seconds == 0) {
814: $display .= $tense;
815: } elsif ($seconds == 1) {
816: $display .= ", 1 second$tense";
817: } else {
818: $display .= ", $seconds seconds$tense";
819: }
820: return $display;
821: }
1.416 jms 822: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
823: return "$prefix$minutes minutes$tense";
824: }
825:
826: # Is it less than 24 hours away? If so,
1.464 raeburn 827: # display hours + minutes, (and + seconds, if format specified it)
1.416 jms 828: if ( $delta < $hour * 24) {
829: my $hours = floor($delta / $hour);
830: my $minutes = floor(($delta % $hour) / $minute);
831: my $hourString = "$hours hours";
832: my $minuteString = ", $minutes minutes";
833: if ($hours == 1) {
834: $hourString = "1 hour";
835: }
836: if ($minutes == 1) {
837: $minuteString = ", 1 minute";
838: }
839: if ($minutes == 0) {
840: $minuteString = "";
841: }
1.464 raeburn 842: if (($format ne '') && ($format =~ /\%(T|S)/)) {
843: my $display = "$prefix$hourString$minuteString";
844: my $seconds = $delta-(($hours * $hour)+($minutes * $minute));
845: if ($seconds == 0) {
846: $display .= $tense;
847: } elsif ($seconds == 1) {
848: $display .= ", 1 second$tense";
849: } else {
850: $display .= ", $seconds seconds$tense";
851: }
852: return $display;
853: }
1.416 jms 854: return "$prefix$hourString$minuteString$tense";
855: }
1.174 albertel 856:
1.464 raeburn 857: # Date/time is more than 24 hours away
858:
1.416 jms 859: my $dt = DateTime->from_epoch(epoch => $time)
860: ->set_time_zone(&Apache::lonlocal::gettimezone());
1.216 bowersj2 861:
1.464 raeburn 862: # If there's a caller supplied format, use it, unless it only displays
863: # H:M:S or H:M.
1.145 bowersj2 864:
1.464 raeburn 865: if (($format ne '') && ($format ne '%T') && ($format ne '%R')) {
1.416 jms 866: my $timeStr = $dt->strftime($format);
867: return $timeStr.' ('.$dt->time_zone_short_name().')';
868: }
1.216 bowersj2 869:
1.416 jms 870: # Less than 5 days away, display day of the week and
871: # HH:MM
1.216 bowersj2 872:
1.416 jms 873: if ( $delta < $day * 5 ) {
874: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
875: $timeStr =~ s/12:00 am/00:00/;
876: $timeStr =~ s/12:00 pm/noon/;
877: return ($inPast ? "last " : "this ") .
878: $timeStr;
879: }
880:
881: my $conjunction='on';
882: if ($type eq 'start') {
883: $conjunction='at';
884: } elsif ($type eq 'end') {
885: $conjunction='by';
886: }
887: # Is it this year?
888: my $dt_now = DateTime->from_epoch(epoch => $now)
889: ->set_time_zone(&Apache::lonlocal::gettimezone());
890: if ( $dt->year() == $dt_now->year()) {
891: # Return on Month Day, HH:MM meridian
892: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
893: $timeStr =~ s/12:00 am/00:00/;
894: $timeStr =~ s/12:00 pm/noon/;
895: return $timeStr;
896: }
1.59 bowersj2 897:
1.416 jms 898: # Not this year, so show the year
899: my $timeStr =
900: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
901: $timeStr =~ s/12:00 am/00:00/;
902: $timeStr =~ s/12:00 pm/noon/;
903: return $timeStr;
904: }
905: }
1.59 bowersj2 906:
907:
1.133 bowersj2 908: sub resource { return 0; }
909: sub communication_status { return 1; }
910: sub quick_status { return 2; }
911: sub long_status { return 3; }
1.225 bowersj2 912: sub part_status_summary { return 4; }
1.51 bowersj2 913:
1.133 bowersj2 914: sub render_resource {
915: my ($resource, $part, $params) = @_;
1.51 bowersj2 916:
1.477 raeburn 917: my $editmapLink;
1.133 bowersj2 918: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 919:
1.134 bowersj2 920: my $link = $params->{"resourceLink"};
1.509.2.1 raeburn 921: if ($resource->ext()) {
922: $link =~ s/\#.+(\?)/$1/g;
923: }
1.306 foxr 924:
925: # The URL part is not escaped at this point, but the symb is...
926:
1.134 bowersj2 927: my $src = $resource->src();
928: my $it = $params->{"iterator"};
1.133 bowersj2 929: my $filter = $it->{FILTER};
930:
931: my $title = $resource->compTitle();
1.258 albertel 932:
1.133 bowersj2 933: my $partLabel = "";
934: my $newBranchText = "";
1.298 albertel 935: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
1.133 bowersj2 936: # If this is a new branch, label it so
937: if ($params->{'isNewBranch'}) {
1.429 droeschl 938: $newBranchText = "<img src='$location/branch.gif' alt=".mt('Branch')." />";
1.51 bowersj2 939: }
940:
1.133 bowersj2 941: # links to open and close the folder
1.306 foxr 942:
1.427 droeschl 943: my $whitespace = $location.'/whitespace_21.gif';
1.509.2.7 raeburn 944: my $linkopen = "<img src='$whitespace' alt='' />";
945: my $nomodal;
946: if (($params->{'modalLink'}) && (!$resource->is_sequence())) {
947: if ($link =~m{^(?:|/adm/wrapper)/ext/([^#]+)}) {
948: my $exturl = $1;
949: if (($ENV{'SERVER_PORT'} == 443) && ($exturl !~ /^https:/)) {
950: $nomodal = 1;
951: }
952: } elsif (($link eq "/public/$LONCAPA::match_domain/$LONCAPA::match_courseid/syllabus") &&
953: ($env{'request.course.id'}) && ($ENV{'SERVER_PORT'} == 443) &&
954: ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
955: $nomodal = 1;
956: }
957: my $esclink = &js_escape($link);
958: if ($nomodal) {
959: $linkopen .= "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
960: } else {
961: $linkopen .= "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
962: }
963: } else {
964: $linkopen .= "<a href=\"$link\">";
965: }
1.133 bowersj2 966: my $linkclose = "</a>";
1.51 bowersj2 967:
1.204 albertel 968: # Default icon: unknown page
1.426 droeschl 969: my $icon = "<img class=\"LC_contentImage\" src='$location/unknown.gif' alt='' />";
1.133 bowersj2 970:
971: if ($resource->is_problem()) {
1.192 bowersj2 972: if ($part eq '0' || $params->{'condensed'}) {
1.426 droeschl 973: $icon = '<img class="LC_contentImage" src="'.$location.'/';
1.389 albertel 974: if ($resource->is_task()) {
975: $icon .= 'task.gif" alt="'.&mt('Task');
976: } else {
977: $icon .= 'problem.gif" alt="'.&mt('Problem');
978: }
1.426 droeschl 979: $icon .='" />';
1.133 bowersj2 980: } else {
981: $icon = $params->{'indentString'};
982: }
1.204 albertel 983: } else {
1.426 droeschl 984: $icon = "<img class=\"LC_contentImage\" src='".&Apache::loncommon::icon($resource->src)."' alt='' />";
1.133 bowersj2 985: }
1.51 bowersj2 986:
1.133 bowersj2 987: # Display the correct map icon to open or shut map
988: if ($resource->is_map()) {
989: my $mapId = $resource->map_pc();
990: my $nowOpen = !defined($filter->{$mapId});
991: if ($it->{CONDITION}) {
992: $nowOpen = !$nowOpen;
993: }
1.426 droeschl 994:
1.205 bowersj2 995: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1.362 www 996: my $title=$resource->title;
1.426 droeschl 997: $title=~s/\"/\&qout;/g;
1.144 bowersj2 998: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 999: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.426 droeschl 1000: $icon = "<img src='$location/arrow." . ($nowOpen ? 'closed' : 'open') . ".gif' alt='' />"
1001: ."<img class=\"LC_contentImage\" src='$location/$icon' alt=\""
1002: .($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1.349 foxr 1003: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1.392 albertel 1004: $params->{'queryString'} . '&filter=';
1.144 bowersj2 1005: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
1006: addToFilter($filter, $mapId) :
1007: removeFromFilter($filter, $mapId);
1.392 albertel 1008: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
1009: . $params->{'hereType'} . '&here=' .
1.384 www 1010: &escape($params->{'here'}) .
1.392 albertel 1011: '&jump=' .
1.384 www 1012: &escape($resource->symb()) .
1.392 albertel 1013: "&folderManip=1\">";
1.306 foxr 1014:
1.144 bowersj2 1015: } else {
1016: # Don't allow users to manipulate folder
1.426 droeschl 1017: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.427 droeschl 1018: $icon = "<img class=\"LC_space\" src='$whitespace' alt='' />"."<img class=\"LC_contentImage\" src='$location/$icon' alt=\"".($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1.144 bowersj2 1019:
1020: $linkopen = "";
1021: $linkclose = "";
1022: }
1.509.2.5 raeburn 1023: if (((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1024: (&Apache::lonnet::allowed('cev',$env{'request.course.id'}))) &&
1.477 raeburn 1025: ($resource->symb=~/\_\_\_[^\_]+\_\_\_uploaded/)) {
1.493 raeburn 1026: if (!$params->{'map_no_edit_link'}) {
1027: my $icon = &Apache::loncommon::lonhttpdurl('/res/adm/pages').'/editmap.png';
1028: $editmapLink=' '.
1.495 raeburn 1029: '<a href="/adm/coursedocs?command=directnav&symb='.&escape($resource->symb()).'">'.
1.477 raeburn 1030: '<img src="'.$icon.'" alt="'.&mt('Edit Content').'" title="'.&mt('Edit Content').'" />'.
1031: '</a>';
1.493 raeburn 1032: }
1.477 raeburn 1033: }
1.509.2.3 raeburn 1034: if ($params->{'mapHidden'} || $resource->randomout()) {
1035: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1036: }
1037: } else {
1038: if ($resource->randomout()) {
1039: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1040: }
1.133 bowersj2 1041: }
1.342 albertel 1042: if (!$resource->condval()) {
1.458 bisitz 1043: $nonLinkedText .= ' <span class="LC_info">('.&mt('conditionally hidden').')</span> ';
1.342 albertel 1044: }
1.413 www 1045: if (($resource->is_practice()) && ($resource->is_raw_problem())) {
1.488 bisitz 1046: $nonLinkedText .=' <span class="LC_info"><b>'.&mt('not graded').'</b></span>';
1.412 www 1047: }
1.426 droeschl 1048:
1.133 bowersj2 1049: # We're done preparing and finally ready to start the rendering
1.426 droeschl 1050: my $result = '<td class="LC_middle">';
1051: my $newfolderType = $resource->is_sequence() ? 'folder' : 'page';
1052:
1.140 bowersj2 1053: my $indentLevel = $params->{'indentLevel'};
1054: if ($newBranchText) { $indentLevel--; }
1055:
1.133 bowersj2 1056: # print indentation
1.140 bowersj2 1057: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 1058: $result .= $params->{'indentString'};
1.84 bowersj2 1059: }
1060:
1.133 bowersj2 1061: # Decide what to display
1062: $result .= "$newBranchText$linkopen$icon$linkclose";
1063:
1064: my $curMarkerBegin = '';
1065: my $curMarkerEnd = '';
1.51 bowersj2 1066:
1.133 bowersj2 1067: # Is this the current resource?
1.158 bowersj2 1068: if (!$params->{'displayedHereMarker'} &&
1069: $resource->symb() eq $params->{'here'} ) {
1.477 raeburn 1070: unless ($resource->is_map()) {
1071: $curMarkerBegin = '<span class="LC_current_nav_location">';
1072: $curMarkerEnd = '</span>';
1073: }
1.424 schulted 1074: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 1075: }
1076:
1.192 bowersj2 1077: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 1078: !$params->{'condensed'}) {
1.274 matthew 1079: my $displaypart=$resource->part_display($part);
1.363 albertel 1080: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1.384 www 1081: if ($link!~/\#/) { $link.='#'.&escape($part); }
1.133 bowersj2 1082: $title = "";
1.51 bowersj2 1083: }
1084:
1.163 bowersj2 1085: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.363 albertel 1086: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1.51 bowersj2 1087: }
1088:
1.266 raeburn 1089: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.509.2.7 raeburn 1090: $linkclose = '</a>';
1091: if ($params->{'modalLink'}) {
1092: my $esclink = &js_escape($link);
1093: if ($nomodal) {
1094: $linkopen = "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
1095: } else {
1096: $linkopen = "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
1097: }
1098: } else {
1099: $linkopen = "<a href=\"$link\">";
1100: }
1.144 bowersj2 1101: }
1.509.2.7 raeburn 1102: $result .= "$curMarkerBegin$linkopen$title$partLabel$linkclose$curMarkerEnd$editmapLink$nonLinkedText</td>";
1.51 bowersj2 1103:
1.133 bowersj2 1104: return $result;
1105: }
1.51 bowersj2 1106:
1.133 bowersj2 1107: sub render_communication_status {
1108: my ($resource, $part, $params) = @_;
1.134 bowersj2 1109: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1110:
1111: my $link = $params->{"resourceLink"};
1.445 droeschl 1112: my $linkopen = "<a href=\"$link\">";
1.134 bowersj2 1113: my $linkclose = "</a>";
1.298 albertel 1114: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.477 raeburn 1115:
1.134 bowersj2 1116: if ($resource->hasDiscussion()) {
1117: $discussionHTML = $linkopen .
1.442 wenzelju 1118: '<img alt="'.&mt('New Discussion').'" src="'.$location.'/chat.gif" title="'.&mt('New Discussion').'"/>' .
1.134 bowersj2 1119: $linkclose;
1120: }
1121:
1122: if ($resource->getFeedback()) {
1123: my $feedback = $resource->getFeedback();
1.394 raeburn 1124: foreach my $msgid (split(/\,/, $feedback)) {
1125: if ($msgid) {
1.445 droeschl 1126: $feedbackHTML .= ' <a href="/adm/email?display='
1.394 raeburn 1127: . &escape($msgid) . '">'
1.442 wenzelju 1128: . '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" title="'.&mt('New E-mail').'"/></a>';
1.134 bowersj2 1129: }
1130: }
1131: }
1132:
1133: if ($resource->getErrors()) {
1134: my $errors = $resource->getErrors();
1.254 matthew 1135: my $errorcount = 0;
1.394 raeburn 1136: foreach my $msgid (split(/,/, $errors)) {
1.254 matthew 1137: last if ($errorcount>=10); # Only output 10 bombs maximum
1.394 raeburn 1138: if ($msgid) {
1.254 matthew 1139: $errorcount++;
1.445 droeschl 1140: $errorHTML .= ' <a href="/adm/email?display='
1.394 raeburn 1141: . &escape($msgid) . '">'
1.442 wenzelju 1142: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" title="'.&mt('New Error').'"/></a>';
1.134 bowersj2 1143: }
1144: }
1.197 bowersj2 1145: }
1146:
1147: if ($params->{'multipart'} && $part != '0') {
1148: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 1149: }
1.426 droeschl 1150: return "<td class=\"LC_middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1.134 bowersj2 1151:
1.133 bowersj2 1152: }
1153: sub render_quick_status {
1154: my ($resource, $part, $params) = @_;
1.135 bowersj2 1155: my $result = "";
1156: my $firstDisplayed = !$params->{'condensed'} &&
1157: $params->{'multipart'} && $part eq "0";
1158:
1159: my $link = $params->{"resourceLink"};
1.445 droeschl 1160: my $linkopen = "<a href=\"$link\">";
1.135 bowersj2 1161: my $linkclose = "</a>";
1.426 droeschl 1162:
1163: $result .= '<td class="LC_middle">';
1.135 bowersj2 1164: if ($resource->is_problem() &&
1165: !$firstDisplayed) {
1.224 bowersj2 1166: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 1167: my $alt = $iconAltTags{$icon};
1168: if ($icon) {
1.298 albertel 1169: my $location=
1170: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1.438 wenzelju 1171: $result .= $linkopen.'<img src="'.$location.'" alt="'.&mt($alt).'" title="'.&mt($alt).'" />'.$linkclose;
1.135 bowersj2 1172: } else {
1.426 droeschl 1173: $result .= " ";
1.135 bowersj2 1174: }
1175: } else { # not problem, no icon
1.426 droeschl 1176: $result .= " ";
1.135 bowersj2 1177: }
1.426 droeschl 1178: $result .= "</td>\n";
1.135 bowersj2 1179: return $result;
1.133 bowersj2 1180: }
1181: sub render_long_status {
1182: my ($resource, $part, $params) = @_;
1.426 droeschl 1183: my $result = '<td class="LC_middle LC_right">';
1.136 bowersj2 1184: my $firstDisplayed = !$params->{'condensed'} &&
1185: $params->{'multipart'} && $part eq "0";
1186:
1187: my $color;
1.488 bisitz 1188: my $info = '';
1.402 albertel 1189: if ($resource->is_problem() || $resource->is_practice()) {
1.136 bowersj2 1190: $color = $colormap{$resource->status};
1.502 raeburn 1191:
1192: if (dueInLessThan24Hours($resource, $part)) {
1.136 bowersj2 1193: $color = $hurryUpColor;
1.488 bisitz 1194: $info = ' title="'.&mt('Due in less than 24 hours!').'"';
1.502 raeburn 1195: } elsif (lastTry($resource, $part)) {
1196: unless (($resource->problemstatus($part) eq 'no') ||
1197: ($resource->problemstatus($part) eq 'no_feedback_ever')) {
1198: $color = $hurryUpColor;
1199: $info = ' title="'.&mt('One try remaining!').'"';
1200: }
1201: }
1.136 bowersj2 1202: }
1203:
1.463 raeburn 1204: if ($resource->kind() eq "res" &&
1205: $resource->is_raw_problem() &&
1206: !$firstDisplayed) {
1.488 bisitz 1207: if ($color) {$result .= '<span style="color:'.$color.'"'.$info.'><b>'; }
1.136 bowersj2 1208: $result .= getDescription($resource, $part);
1.488 bisitz 1209: if ($color) {$result .= "</b></span>"; }
1.136 bowersj2 1210: }
1.402 albertel 1211: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1.400 albertel 1212: $result .= &mt('(randomly select [_1])', $resource->randompick());
1213: }
1214: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1215: $result .= &mt('(randomly ordered)');
1.136 bowersj2 1216: }
1.210 bowersj2 1217:
1.213 bowersj2 1218: # Debugging code
1219: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1220: # ' - Part: ' . $part;
1221:
1.210 bowersj2 1222: $result .= "</td>\n";
1.136 bowersj2 1223:
1224: return $result;
1.51 bowersj2 1225: }
1226:
1.227 bowersj2 1227: # Colors obtained by taking the icons, matching the colors, and
1228: # possibly reducing the Value (HSV) of the color, if it's too bright
1229: # for text, generally by one third or so.
1.225 bowersj2 1230: my %statusColors =
1231: (
1232: $resObj->CLOSED => '#000000',
1.227 bowersj2 1233: $resObj->OPEN => '#998b13',
1234: $resObj->CORRECT => '#26933f',
1235: $resObj->INCORRECT => '#c48207',
1236: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1237: $resObj->ERROR => '#000000'
1238: );
1239: my %statusStrings =
1240: (
1241: $resObj->CLOSED => 'Not yet open',
1242: $resObj->OPEN => 'Open',
1243: $resObj->CORRECT => 'Correct',
1244: $resObj->INCORRECT => 'Incorrect',
1245: $resObj->ATTEMPTED => 'Attempted',
1246: $resObj->ERROR => 'Network Error'
1247: );
1248: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1249:
1250: sub render_parts_summary_status {
1251: my ($resource, $part, $params) = @_;
1.256 albertel 1252: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1253: if ($params->{showParts}) {
1254: return '<td></td>';
1255: }
1256:
1257: my $td = "<td align='right'>\n";
1258: my $endtd = "</td>\n";
1.256 albertel 1259: my @probs;
1.225 bowersj2 1260:
1.256 albertel 1261: if ($resource->contains_problem) {
1262: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1263: } else {
1264: @probs=($resource);
1265: }
1266: my $return;
1267: my %overallstatus;
1268: my $totalParts;
1269: foreach my $resource (@probs) {
1270: # If there is a single part, just show the simple status
1271: if ($resource->singlepart()) {
1272: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1273: $overallstatus{$status}++;
1274: $totalParts++;
1275: next;
1276: }
1277: # Now we can be sure the $part doesn't really matter.
1278: my $statusCount = $resource->simpleStatusCount();
1279: my @counts;
1280: foreach my $status (@statuses) {
1281: # decouple display order from the simpleStatusCount order
1282: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1283: if ($statusCount->[$slot]) {
1284: $overallstatus{$status}+=$statusCount->[$slot];
1285: $totalParts+=$statusCount->[$slot];
1286: }
1287: }
1288: }
1289: $return.= $td . $totalParts . ' parts: ';
1290: foreach my $status (@statuses) {
1.488 bisitz 1291: if ($overallstatus{$status}) {
1292: $return.='<span style="color:' . $statusColors{$status}
1293: . '">' . $overallstatus{$status} . ' '
1294: . $statusStrings{$status} . '</span>';
1295: }
1.225 bowersj2 1296: }
1.256 albertel 1297: $return.= $endtd;
1298: return $return;
1.225 bowersj2 1299: }
1300:
1.133 bowersj2 1301: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1302: \&render_quick_status, \&render_long_status,
1303: \&render_parts_summary_status);
1.132 bowersj2 1304:
1305: sub setDefault {
1306: my ($val, $default) = @_;
1307: if (!defined($val)) { return $default; }
1308: return $val;
1309: }
1310:
1.296 albertel 1311: sub cmp_title {
1312: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1313: $atitle=~s/^\s*//;
1314: $btitle=~s/^\s*//;
1315: return $atitle cmp $btitle;
1316: }
1317:
1.132 bowersj2 1318: sub render {
1319: my $args = shift;
1.140 bowersj2 1320: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1321: my $result = '';
1.132 bowersj2 1322: # Configure the renderer.
1323: my $cols = $args->{'cols'};
1324: if (!defined($cols)) {
1325: # no columns, no nav maps.
1326: return '';
1327: }
1.140 bowersj2 1328: my $navmap;
1329: if (defined($args->{'navmap'})) {
1330: $navmap = $args->{'navmap'};
1331: }
1332:
1.158 bowersj2 1333: my $r = $args->{'r'};
1.140 bowersj2 1334: my $queryString = $args->{'queryString'};
1.159 bowersj2 1335: my $jump = $args->{'jump'};
1.158 bowersj2 1336: my $here = $args->{'here'};
1.153 bowersj2 1337: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1338: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1339: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1340: # before the current resource when using #current
1341:
1342: # If we were passed 'here' information, we are not rendering
1343: # after a folder manipulation, and we were not passed an
1344: # iterator, make sure we open the folders to show the "here"
1345: # marker
1346: my $filterHash = {};
1347: # Figure out what we're not displaying
1.394 raeburn 1348: foreach my $item (split(/\,/, $env{"form.filter"})) {
1349: if ($item) {
1350: $filterHash->{$item} = "1";
1.140 bowersj2 1351: }
1352: }
1353:
1.191 bowersj2 1354: # Filter: Remember filter function and add our own filter: Refuse
1355: # to show hidden resources unless the user can see them.
1356: my $userCanSeeHidden = advancedUser();
1357: my $filterFunc = setDefault($args->{'filterFunc'},
1358: sub {return 1;});
1359: if (!$userCanSeeHidden) {
1360: # Without renaming the filterfunc, the server seems to go into
1361: # an infinite loop
1362: my $oldFilterFunc = $filterFunc;
1363: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1364: &$oldFilterFunc($res);};
1365: }
1366:
1.140 bowersj2 1367: my $condition = 0;
1.320 albertel 1368: if ($env{'form.condition'}) {
1.140 bowersj2 1369: $condition = 1;
1370: }
1371:
1.320 albertel 1372: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1.140 bowersj2 1373: # Step 1: Check to see if we have a navmap
1374: if (!defined($navmap)) {
1.221 bowersj2 1375: $navmap = Apache::lonnavmaps::navmap->new();
1.340 albertel 1376: if (!defined($navmap)) {
1.423 raeburn 1377: # no longer in course
1.388 albertel 1378: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1.362 www 1379: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1.340 albertel 1380: }
1381: }
1.140 bowersj2 1382:
1383: # Step two: Locate what kind of here marker is necessary
1384: # Determine where the "here" marker is and where the screen jumps to.
1385:
1.332 albertel 1386: if ($env{'form.postsymb'} ne '') {
1.320 albertel 1387: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1.332 albertel 1388: } elsif ($env{'form.postdata'} ne '') {
1.140 bowersj2 1389: # couldn't find a symb, is there a URL?
1.320 albertel 1390: my $currenturl = $env{'form.postdata'};
1.158 bowersj2 1391: #$currenturl=~s/^http\:\/\///;
1392: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1393:
1.158 bowersj2 1394: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.331 albertel 1395: }
1396: if ($here eq '') {
1.317 albertel 1397: my $last;
1.320 albertel 1398: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1.317 albertel 1399: &GDBM_READER(),0640)) {
1400: $last=$hash{'last_known'};
1401: untie(%hash);
1402: }
1403: if ($last) { $here = $jump = $last; }
1404: }
1.158 bowersj2 1405:
1.140 bowersj2 1406: # Step three: Ensure the folders are open
1407: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1408: my $curRes;
1.140 bowersj2 1409: my $found = 0;
1410:
1411: # We only need to do this if we need to open the maps to show the
1412: # current position. This will change the counter so we can't count
1413: # for the jump marker with this loop.
1.294 albertel 1414: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1415: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1416: my $mapStack = $mapIterator->getStack();
1417:
1418: # Ensure the parent maps are open
1419: for my $map (@{$mapStack}) {
1420: if ($condition) {
1421: undef $filterHash->{$map->map_pc()};
1422: } else {
1423: $filterHash->{$map->map_pc()} = 1;
1424: }
1425: }
1426: $found = 1;
1427: }
1428: }
1.159 bowersj2 1429: }
1.140 bowersj2 1430:
1.320 albertel 1431: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1.140 bowersj2 1432: # If this is a click on a folder or something, we want to preserve the "here"
1433: # from the querystring, and get the new "jump" marker
1.320 albertel 1434: $here = $env{'form.here'};
1435: $jump = $env{'form.jump'};
1.140 bowersj2 1436: }
1437:
1.132 bowersj2 1438: my $it = $args->{'iterator'};
1439: if (!defined($it)) {
1.320 albertel 1440: # Construct a default iterator based on $env{'form.'} information
1.140 bowersj2 1441:
1442: # Step 1: Check to see if we have a navmap
1443: if (!defined($navmap)) {
1.221 bowersj2 1444: $navmap = Apache::lonnavmaps::navmap->new();
1.423 raeburn 1445: if (!defined($navmap)) {
1446: # no longer in course
1447: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1448: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1449: }
1.140 bowersj2 1450: }
1451:
1.144 bowersj2 1452: # See if we're being passed a specific map
1453: if ($args->{'iterator_map'}) {
1454: my $map = $args->{'iterator_map'};
1.145 bowersj2 1455: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1456: my $firstResource = $map->map_start();
1457: my $finishResource = $map->map_finish();
1458:
1459: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1460: } else {
1.401 albertel 1461: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1.144 bowersj2 1462: }
1.132 bowersj2 1463: }
1.256 albertel 1464:
1.159 bowersj2 1465: # (re-)Locate the jump point, if any
1.191 bowersj2 1466: # Note this does not take filtering or hidden into account... need
1467: # to be fixed?
1.159 bowersj2 1468: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1469: my $curRes;
1.159 bowersj2 1470: my $foundJump = 0;
1471: my $counter = 0;
1472:
1.222 bowersj2 1473: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1474: if (ref($curRes)) { $counter++; }
1475:
1476: if (ref($curRes) && $jump eq $curRes->symb()) {
1477:
1478: # This is why we have to use the main iterator instead of the
1479: # potentially faster DFS: The count has to be the same, so
1480: # the order has to be the same, which DFS won't give us.
1481: $args->{'currentJumpIndex'} = $counter;
1482: $foundJump = 1;
1483: }
1484: }
1485:
1.132 bowersj2 1486: my $showParts = setDefault($args->{'showParts'}, 1);
1487: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1488: # keeps track of when the current resource is found,
1489: # so we can back up a few and put the anchor above the
1490: # current resource
1.140 bowersj2 1491: my $printKey = $args->{'printKey'};
1492: my $printCloseAll = $args->{'printCloseAll'};
1493: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.425 schulted 1494:
1.140 bowersj2 1495: # Print key?
1496: if ($printKey) {
1497: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1498: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1.298 albertel 1499: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.140 bowersj2 1500: if ($navmap->{LAST_CHECK}) {
1501: $result .=
1.434 bisitz 1502: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('New discussion since').' '.
1.140 bowersj2 1503: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1504: '</td><td align="center" valign="bottom"> '.
1.434 bisitz 1505: '<img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1506: '</td>';
1507: } else {
1508: $result .= '<td align="center" valign="bottom"> '.
1.434 bisitz 1509: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1510: ' <img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').
1.140 bowersj2 1511: '</td>';
1512: }
1513:
1514: $result .= '</tr></table>';
1515: }
1516:
1.172 bowersj2 1517: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1518: my ($link,$text);
1.140 bowersj2 1519: if ($condition) {
1.446 raeburn 1520: $link='navmaps?condition=0&filter=&'.$queryString.
1.449 bisitz 1521: '&here='.&escape($here);
1.377 www 1522: $text='Close all folders';
1.140 bowersj2 1523: } else {
1.446 raeburn 1524: $link='navmaps?condition=1&filter=&'.$queryString.
1.449 bisitz 1525: '&here='.&escape($here);
1.377 www 1526: $text='Open all folders';
1.281 albertel 1527: }
1.446 raeburn 1528: if ($env{'form.register'}) {
1529: $link .= '&register='.$env{'form.register'};
1530: }
1.281 albertel 1531: if ($args->{'caller'} eq 'navmapsdisplay') {
1.478 raeburn 1532: unless ($args->{'notools'}) {
1533: &add_linkitem($args->{'linkitems'},'changefolder',
1534: "location.href='$link'",$text);
1535: }
1.281 albertel 1536: } else {
1.446 raeburn 1537: $result.= '<a href="'.$link.'">'.&mt($text).'</a>';
1.281 albertel 1538: }
1.266 raeburn 1539: $result .= "\n";
1540: }
1.140 bowersj2 1541:
1.266 raeburn 1542: # Check for any unread discussions in all resources.
1.478 raeburn 1543: if (($args->{'caller'} eq 'navmapsdisplay') && (!$args->{'notools'})) {
1.296 albertel 1544: &add_linkitem($args->{'linkitems'},'clearbubbles',
1545: 'document.clearbubbles.submit()',
1546: 'Mark all posts read');
1.297 albertel 1547: my $time=time;
1.486 raeburn 1548: my $querystr = &HTML::Entities::encode($ENV{'QUERY_STRING'},'<>&"');
1.296 albertel 1549: $result .= (<<END);
1550: <form name="clearbubbles" method="post" action="/adm/feedback">
1.486 raeburn 1551: <input type="hidden" name="navurl" value="$querystr" />
1.297 albertel 1552: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1553: END
1.446 raeburn 1554: if ($env{'form.register'}) {
1555: $result .= '<input type="hidden" name="register" value="'.$env{'form.register'}.'" />';
1556: }
1.296 albertel 1557: if ($args->{'sort'} eq 'discussion') {
1558: my $totdisc = 0;
1559: my $haveDisc = '';
1560: my @allres=$navmap->retrieveResources();
1561: foreach my $resource (@allres) {
1562: if ($resource->hasDiscussion()) {
1.323 albertel 1563: $haveDisc .= $resource->wrap_symb().':';
1.296 albertel 1564: $totdisc ++;
1.267 albertel 1565: }
1566: }
1.296 albertel 1567: if ($totdisc > 0) {
1568: $haveDisc =~ s/:$//;
1569: $result .= (<<END);
1570: <input type="hidden" name="navmaps" value="$haveDisc" />
1571: </form>
1572: END
1573: }
1.297 albertel 1574: }
1575: $result.='</form>';
1.478 raeburn 1576: }
1577: if (($args->{'caller'} eq 'navmapsdisplay') &&
1.509.2.5 raeburn 1578: ((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1579: (&Apache::lonnet::allowed('cev',$env{'request.course.id'})))) {
1.478 raeburn 1580: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1581: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1582: if ($env{'course.'.$env{'request.course.id'}.'.url'} eq
1583: "uploaded/$cdom/$cnum/default.sequence") {
1584: &add_linkitem($args->{'linkitems'},'edittoplevel',
1585: "javascript:gocmd('/adm/coursedocs','editdocs');",
1586: 'Content Editor');
1.475 raeburn 1587: }
1.266 raeburn 1588: }
1.276 albertel 1589:
1.281 albertel 1590: if ($args->{'caller'} eq 'navmapsdisplay') {
1.476 raeburn 1591: $result .= &show_linkitems_toolbar($args,$condition);
1.281 albertel 1592: } elsif ($args->{'sort_html'}) {
1593: $result.=$args->{'sort_html'};
1594: }
1.276 albertel 1595:
1.425 schulted 1596: #$result .= "<br />\n";
1.140 bowersj2 1597: if ($r) {
1598: $r->print($result);
1599: $r->rflush();
1600: $result = "";
1601: }
1.132 bowersj2 1602: # End parameter setting
1.425 schulted 1603:
1604: $result .= "<br />\n";
1605:
1.132 bowersj2 1606: # Data
1.431 schulted 1607: $result.=&Apache::loncommon::start_data_table("LC_tableOfContent");
1.426 droeschl 1608:
1.132 bowersj2 1609: my $res = "Apache::lonnavmaps::resource";
1610: my %condenseStatuses =
1611: ( $res->NETWORK_FAILURE => 1,
1612: $res->NOTHING_SET => 1,
1613: $res->CORRECT => 1 );
1.133 bowersj2 1614:
1615: # Shared variables
1616: $args->{'counter'} = 0; # counts the rows
1617: $args->{'indentLevel'} = 0;
1618: $args->{'isNewBranch'} = 0;
1.426 droeschl 1619: $args->{'condensed'} = 0;
1620:
1.428 droeschl 1621: my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
1.426 droeschl 1622: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' alt='' />");
1.133 bowersj2 1623: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1624:
1.509.2.3 raeburn 1625: # If we're suppressing empty sequences, look for them here.
1626: # We also do this even if $args->{'suppressEmptySequences'}
1627: # is not true, so we can hide empty sequences for which the
1628: # hiddenresource parameter is set to yes (at map level), or
1629: # mark as hidden for users who have $userCanSeeHidden.
1630: # Use DFS for speed, since structure actually doesn't matter,
1631: # except what map has what resources.
1632:
1633: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1634: $it->{FIRST_RESOURCE},
1635: $it->{FINISH_RESOURCE},
1636: {}, undef, 1);
1637:
1638: my $depth = 0;
1639: $dfsit->next();
1640: my $curRes = $dfsit->next();
1641: while ($depth > -1) {
1642: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1643: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1644:
1645: if (ref($curRes)) {
1646: # Parallel pre-processing: Do sequences have non-filtered-out children?
1647: if ($curRes->is_map()) {
1648: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1649: # Sequences themselves do not count as visible children,
1650: # unless those sequences also have visible children.
1651: # This means if a sequence appears, there's a "promise"
1652: # that there's something under it if you open it, somewhere.
1653: } elsif ($curRes->src()) {
1654: # Not a sequence: if it's filtered, ignore it, otherwise
1655: # rise up the stack and mark the sequences as having children
1656: if (&$filterFunc($curRes)) {
1657: for my $sequence (@{$dfsit->getStack()}) {
1658: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1.190 bowersj2 1659: }
1660: }
1661: }
1662: }
1.509.2.3 raeburn 1663: } continue {
1664: $curRes = $dfsit->next();
1.190 bowersj2 1665: }
1666:
1.133 bowersj2 1667: my $displayedJumpMarker = 0;
1.132 bowersj2 1668: # Set up iteration.
1669: my $now = time();
1670: my $in24Hours = $now + 24 * 60 * 60;
1671: my $rownum = 0;
1672:
1.141 bowersj2 1673: # export "here" marker information
1674: $args->{'here'} = $here;
1675:
1.222 bowersj2 1676: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1677: my @resources;
1678: my $code='';# sub { !(shift->is_map();) };
1679: if ($args->{'sort'} eq 'title') {
1.276 albertel 1680: my $oldFilterFunc = $filterFunc;
1681: my $filterFunc=
1682: sub {
1683: my ($res)=@_;
1684: if ($res->is_map()) { return 0;}
1685: return &$oldFilterFunc($res);
1686: };
1687: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1688: @resources= sort { &cmp_title($a,$b) } @resources;
1689: } elsif ($args->{'sort'} eq 'duedate') {
1690: my $oldFilterFunc = $filterFunc;
1691: my $filterFunc=
1692: sub {
1693: my ($res)=@_;
1694: if (!$res->is_problem()) { return 0;}
1695: return &$oldFilterFunc($res);
1696: };
1697: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1698: @resources= sort {
1.270 albertel 1699: if ($a->duedate ne $b->duedate) {
1700: return $a->duedate cmp $b->duedate;
1701: }
1.296 albertel 1702: my $value=&cmp_title($a,$b);
1703: return $value;
1.270 albertel 1704: } @resources;
1.296 albertel 1705: } elsif ($args->{'sort'} eq 'discussion') {
1706: my $oldFilterFunc = $filterFunc;
1707: my $filterFunc=
1708: sub {
1709: my ($res)=@_;
1710: if (!$res->hasDiscussion() &&
1711: !$res->getFeedback() &&
1712: !$res->getErrors()) { return 0;}
1713: return &$oldFilterFunc($res);
1714: };
1715: @resources=$navmap->retrieveResources(undef,$filterFunc);
1716: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1717: } else {
1718: #unknow sort mechanism or default
1719: undef($args->{'sort'});
1.270 albertel 1720: }
1721:
1.276 albertel 1722:
1.509.2.7 raeburn 1723: my $inhibitmenu;
1724: if ($args->{'modalLink'}) {
1725: $inhibitmenu = '&inhibitmenu=yes';
1726: }
1727:
1.270 albertel 1728: while (1) {
1729: if ($args->{'sort'}) {
1730: $curRes = shift(@resources);
1731: } else {
1732: $curRes = $it->next($closeAllPages);
1733: }
1734: if (!$curRes) { last; }
1735:
1.132 bowersj2 1736: # Maintain indentation level.
1737: if ($curRes == $it->BEGIN_MAP() ||
1738: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1739: $args->{'indentLevel'}++;
1.132 bowersj2 1740: }
1741: if ($curRes == $it->END_MAP() ||
1742: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1743: $args->{'indentLevel'}--;
1.132 bowersj2 1744: }
1745: # Notice new branches
1746: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1747: $args->{'isNewBranch'} = 1;
1748: }
1749:
1750: # If this isn't an actual resource, continue on
1751: if (!ref($curRes)) {
1752: next;
1.132 bowersj2 1753: }
1.133 bowersj2 1754:
1.143 bowersj2 1755: # If this has been filtered out, continue on
1756: if (!(&$filterFunc($curRes))) {
1757: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1758: next;
1759: }
1.132 bowersj2 1760:
1.190 bowersj2 1761: # If this is an empty sequence and we're filtering them, continue on
1.509.2.3 raeburn 1762: $args->{'mapHidden'} = 0;
1763: if (($curRes->is_map()) && (!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN})) {
1764: if ($args->{'suppressEmptySequences'}) {
1765: next;
1766: } else {
1767: my $mapname = &Apache::lonnet::declutter($curRes->src());
1768: $mapname = &Apache::lonnet::deversion($mapname);
1769: if (lc($navmap->get_mapparam(undef,$mapname,"0.hiddenresource")) eq 'yes') {
1770: if ($userCanSeeHidden) {
1771: $args->{'mapHidden'} = 1;
1772: } else {
1773: next;
1774: }
1775: }
1776: }
1.190 bowersj2 1777: }
1778:
1.153 bowersj2 1779: # If we're suppressing navmaps and this is a navmap, continue on
1780: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1781: next;
1782: }
1783:
1.191 bowersj2 1784: $args->{'counter'}++;
1785:
1.132 bowersj2 1786: # Does it have multiple parts?
1.133 bowersj2 1787: $args->{'multipart'} = 0;
1788: $args->{'condensed'} = 0;
1.132 bowersj2 1789: my @parts;
1790:
1791: # Decide what parts to show.
1.133 bowersj2 1792: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1793: @parts = @{$curRes->parts()};
1.192 bowersj2 1794: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1795:
1796: if ($condenseParts) { # do the condensation
1.133 bowersj2 1797: if (!$args->{'condensed'}) {
1.132 bowersj2 1798: # Decide whether to condense based on similarity
1.192 bowersj2 1799: my $status = $curRes->status($parts[0]);
1800: my $due = $curRes->duedate($parts[0]);
1801: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1802: my $statusAllSame = 1;
1803: my $dueAllSame = 1;
1804: my $openAllSame = 1;
1.192 bowersj2 1805: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1806: if ($curRes->status($parts[$i]) != $status){
1807: $statusAllSame = 0;
1808: }
1809: if ($curRes->duedate($parts[$i]) != $due ) {
1810: $dueAllSame = 0;
1811: }
1812: if ($curRes->opendate($parts[$i]) != $open) {
1813: $openAllSame = 0;
1814: }
1815: }
1816: # $*allSame is true if all the statuses were
1817: # the same. Now, if they are all the same and
1818: # match one of the statuses to condense, or they
1819: # are all open with the same due date, or they are
1820: # all OPEN_LATER with the same open date, display the
1821: # status of the first non-zero part (to get the 'correct'
1822: # status right, since 0 is never 'correct' or 'open').
1823: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1824: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1825: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1826: @parts = ($parts[0]);
1.133 bowersj2 1827: $args->{'condensed'} = 1;
1.132 bowersj2 1828: }
1829: }
1.198 bowersj2 1830: # Multipart problem with one part: always "condense" (happens
1831: # to match the desirable behavior)
1832: if ($curRes->countParts() == 1) {
1833: @parts = ($parts[0]);
1834: $args->{'condensed'} = 1;
1835: }
1.132 bowersj2 1836: }
1.157 bowersj2 1837: }
1.132 bowersj2 1838:
1839: # If the multipart problem was condensed, "forget" it was multipart
1840: if (scalar(@parts) == 1) {
1.133 bowersj2 1841: $args->{'multipart'} = 0;
1.192 bowersj2 1842: } else {
1843: # Add part 0 so we display it correctly.
1844: unshift @parts, '0';
1.132 bowersj2 1845: }
1.310 albertel 1846:
1847: {
1848: my ($src,$symb,$anchor,$stack);
1849: if ($args->{'sort'}) {
1850: my $it = $navmap->getIterator(undef, undef, undef, 1);
1851: while ( my $res=$it->next()) {
1852: if (ref($res) &&
1853: $res->symb() eq $curRes->symb()) { last; }
1854: }
1855: $stack=$it->getStack();
1856: } else {
1857: $stack=$it->getStack();
1858: }
1859: ($src,$symb,$anchor)=getLinkForResource($stack);
1860: if (defined($anchor)) { $anchor='#'.$anchor; }
1861: my $srcHasQuestion = $src =~ /\?/;
1862: $args->{"resourceLink"} = $src.
1.449 bisitz 1863: ($srcHasQuestion?'&':'?') .
1.509.2.7 raeburn 1864: 'symb=' . &escape($symb).$inhibitmenu.$anchor;
1.310 albertel 1865: }
1.132 bowersj2 1866: # Now, we've decided what parts to show. Loop through them and
1867: # show them.
1.192 bowersj2 1868: foreach my $part (@parts) {
1.132 bowersj2 1869: $rownum ++;
1870:
1.431 schulted 1871: $result .= &Apache::loncommon::start_data_table_row();
1.134 bowersj2 1872:
1873: # Set up some data about the parts that the cols might want
1874: my $filter = $it->{FILTER};
1.270 albertel 1875:
1.132 bowersj2 1876: # Now, display each column.
1877: foreach my $col (@$cols) {
1.139 bowersj2 1878: my $colHTML = '';
1879: if (ref($col)) {
1880: $colHTML .= &$col($curRes, $part, $args);
1881: } else {
1882: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1883: }
1.132 bowersj2 1884:
1.133 bowersj2 1885: # If this is the first column and it's time to print
1886: # the anchor, do so
1887: if ($col == $cols->[0] &&
1888: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1889: $currentJumpDelta) {
1890: # Jam the anchor after the <td> tag;
1891: # necessary for valid HTML (which Mozilla requires)
1892: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1893: $displayedJumpMarker = 1;
1894: }
1.139 bowersj2 1895: $result .= $colHTML . "\n";
1.132 bowersj2 1896: }
1.431 schulted 1897: $result .= &Apache::loncommon::end_data_table_row();
1.140 bowersj2 1898: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1899: }
1.153 bowersj2 1900:
1.139 bowersj2 1901: if ($r && $rownum % 20 == 0) {
1902: $r->print($result);
1903: $result = "";
1904: $r->rflush();
1.132 bowersj2 1905: }
1.156 bowersj2 1906: } continue {
1.208 bowersj2 1907: if ($r) {
1908: # If we have the connection, make sure the user is still connected
1909: my $c = $r->connection;
1910: if ($c->aborted()) {
1911: # Who cares what we do, nobody will see it anyhow.
1912: return '';
1913: }
1914: }
1.132 bowersj2 1915: }
1.486 raeburn 1916:
1917: $result.=&Apache::loncommon::end_data_table();
1.132 bowersj2 1918:
1.134 bowersj2 1919: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1920: # delay needed because the browser is processing the jump before
1921: # it finishes rendering, so it goes to the wrong place!
1922: # onload might be better, but this routine has no access to that.
1923: # On mozilla, the 0-millisecond timeout seems to prevent this;
1924: # it's quite likely this might fix other browsers, too, and
1925: # certainly won't hurt anything.
1.139 bowersj2 1926: if ($displayedJumpMarker) {
1.449 bisitz 1927: $result .= &Apache::lonhtmlcommon::scripttag("
1.247 albertel 1928: if (location.href.indexOf('#curloc')==-1) {
1929: setTimeout(\"location += '#curloc';\", 0)
1930: }
1.449 bisitz 1931: ");
1.134 bowersj2 1932: }
1933:
1.140 bowersj2 1934: if ($r) {
1935: $r->print($result);
1936: $result = "";
1937: $r->rflush();
1938: }
1939:
1.132 bowersj2 1940: return $result;
1941: }
1942:
1.281 albertel 1943: sub add_linkitem {
1944: my ($linkitems,$name,$cmd,$text)=@_;
1945: $$linkitems{$name}{'cmd'}=$cmd;
1946: $$linkitems{$name}{'text'}=&mt($text);
1947: }
1948:
1.430 schulted 1949: sub show_linkitems_toolbar {
1.476 raeburn 1950: my ($args,$condition) = @_;
1.478 raeburn 1951: my $result;
1.476 raeburn 1952: if (ref($args) eq 'HASH') {
1953: if (ref($args->{'linkitems'}) eq 'HASH') {
1.478 raeburn 1954: my $numlinks = scalar(keys(%{$args->{'linkitems'}}));
1955: if ($numlinks > 1) {
1956: $result = '<td>'.
1957: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',
1958: undef,'RAT').
1959: '</td>'.
1960: '<td> </td>'.
1961: '<td class="LC_middle">'.&mt('Tools:').'</td>';
1962: }
1963: $result .= '<td align="left">'."\n".
1964: '<ul id="LC_toolbar">';
1.476 raeburn 1965: my @linkorder = ('firsthomework','everything','uncompleted',
1966: 'changefolder','clearbubbles','edittoplevel');
1967: foreach my $link (@linkorder) {
1968: if (ref($args->{'linkitems'}{$link}) eq 'HASH') {
1969: if ($args->{'linkitems'}{$link}{'text'} ne '') {
1970: $args->{'linkitems'}{$link}{'cmd'}=~s/"/'/g;
1971: if ($args->{'linkitems'}{$link}{'cmd'}) {
1.478 raeburn 1972: my $link_id = 'LC_content_toolbar_'.$link;
1.476 raeburn 1973: if ($link eq 'changefolder') {
1974: if ($condition) {
1975: $link_id='LC_content_toolbar_changefolder_toggled';
1976: } else {
1977: $link_id='LC_content_toolbar_changefolder';
1978: }
1979: }
1980: $result .= '<li><a href="#" '.
1981: 'onclick="'.$args->{'linkitems'}{$link}{'cmd'}.'" '.
1982: 'id="'.$link_id.'" '.
1983: 'class="LC_toolbarItem" '.
1984: 'title="'.$args->{'linkitems'}{$link}{'text'}.'">'.
1985: '</a></li>'."\n";
1.446 raeburn 1986: }
1987: }
1988: }
1989: }
1.476 raeburn 1990: $result .= '</ul>'.
1.486 raeburn 1991: '</td>';
1.478 raeburn 1992: if (($numlinks==1) && (exists($args->{'linkitems'}{'edittoplevel'}))) {
1993: $result .= '<td><a href="'.$args->{'linkitems'}{'edittoplevel'}{'cmd'}.'">'.
1994: &mt('Content Editor').'</a></td>';
1995: }
1.476 raeburn 1996: }
1997: if ($args->{'sort_html'}) {
1998: $result .= '<td> </td><td> </td><td> </td>'.
1999: '<td align="right">'.$args->{'sort_html'}.'</td>';
1.446 raeburn 2000: }
1.430 schulted 2001: }
1.478 raeburn 2002: if ($result) {
2003: $result = "<table><tr>$result</tr></table>";
2004: }
1.430 schulted 2005: return $result;
2006: }
2007:
1.133 bowersj2 2008: 1;
2009:
1.418 jms 2010:
2011:
2012:
2013:
2014:
2015:
2016:
2017:
1.133 bowersj2 2018: package Apache::lonnavmaps::navmap;
2019:
2020: =pod
2021:
1.216 bowersj2 2022: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 2023:
1.217 bowersj2 2024: =head2 Overview
1.133 bowersj2 2025:
1.217 bowersj2 2026: The navmap object's job is to provide access to the resources
2027: in the course as Apache::lonnavmaps::resource objects, and to
2028: query and manage the relationship between those resource objects.
2029:
2030: Generally, you'll use the navmap object in one of three basic ways.
2031: In order of increasing complexity and power:
2032:
2033: =over 4
2034:
1.358 albertel 2035: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
1.217 bowersj2 2036: various ways to obtain resource objects, based on various identifiers.
2037: Use this when you want to request information about one object or
2038: a handful of resources you already know the identities of, from some
2039: other source. For more about Ids, Symbs, and MapPcs, see the
2040: Resource documentation. Note that Url should be a B<last resort>,
1.358 albertel 2041: not your first choice; it only really works when there is only one
1.217 bowersj2 2042: instance of the resource in the course, which only applies to
1.358 albertel 2043: maps, and even that may change in the future (see the B<getResourceByUrl>
2044: documentation for more details.)
1.217 bowersj2 2045:
2046: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
2047: retrieves resources matching some criterion and returns them
2048: in a flat array, with no structure information. Use this when
2049: you are manipulating a series of resources, based on what map
2050: the are in, but do not care about branching, or exactly how
2051: the maps and resources are related. This is the most common case.
2052:
2053: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
2054: the course's navmap in various ways without writing the traversal
2055: code yourself. See iterator documentation below. Use this when
2056: you need to know absolutely everything about the course, including
2057: branches and the precise relationship between maps and resources.
2058:
2059: =back
2060:
2061: =head2 Creation And Destruction
2062:
2063: To create a navmap object, use the following function:
1.133 bowersj2 2064:
2065: =over 4
2066:
1.221 bowersj2 2067: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 2068:
1.221 bowersj2 2069: Creates a new navmap object. Returns the navmap object if this is
2070: successful, or B<undef> if not.
1.174 albertel 2071:
1.216 bowersj2 2072: =back
2073:
2074: =head2 Methods
2075:
2076: =over 4
2077:
1.174 albertel 2078: =item * B<getIterator>(first, finish, filter, condition):
2079:
2080: See iterator documentation below.
1.133 bowersj2 2081:
2082: =cut
2083:
2084: use strict;
2085: use GDBM_File;
1.320 albertel 2086: use Apache::lonnet;
1.397 albertel 2087: use LONCAPA;
1.133 bowersj2 2088:
2089: sub new {
2090: # magic invocation to create a class instance
2091: my $proto = shift;
2092: my $class = ref($proto) || $proto;
2093: my $self = {};
1.501 raeburn 2094: bless($self); # So we can call change_user if necessary
1.133 bowersj2 2095:
1.453 www 2096: $self->{USERNAME} = shift || $env{'user.name'};
2097: $self->{DOMAIN} = shift || $env{'user.domain'};
1.491 raeburn 2098: $self->{CODE} = shift;
1.496 raeburn 2099: $self->{NOHIDE} = shift;
1.453 www 2100:
1.465 foxr 2101:
2102:
1.133 bowersj2 2103: # Resource cache stores navmap resources as we reference them. We generate
2104: # them on-demand so we don't pay for creating resources unless we use them.
2105: $self->{RESOURCE_CACHE} = {};
2106:
2107: # Network failure flag, if we accessed the course or user opt and
2108: # failed
2109: $self->{NETWORK_FAILURE} = 0;
2110:
1.465 foxr 2111: # We can only tie the nav hash as done below if the username/domain
2112: # match the env one. Otherwise change_user does everything we need...since we can't
1.501 raeburn 2113: # assume there are course hashes for the specific requested user:domain
2114: # Note: change_user is also called if we need the nav hash when printing CODEd
2115: # assignments or printing an exam, in which the enclosing folder for the items in
2116: # the exam has hidden set.
1.465 foxr 2117: #
1.133 bowersj2 2118:
1.501 raeburn 2119: if (($self->{USERNAME} eq $env{'user.name'}) && ($self->{DOMAIN} eq $env{'user.domain'}) &&
2120: !$self->{CODE} && !$self->{NOHIDE}) {
1.465 foxr 2121:
2122: # tie the nav hash
2123:
2124: my %navmaphash;
2125: my %parmhash;
2126: my $courseFn = $env{"request.course.fn"};
2127: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
2128: &GDBM_READER(), 0640))) {
2129: return undef;
2130: }
2131:
2132: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
2133: &GDBM_READER(), 0640)))
2134: {
2135: untie %{$self->{PARM_HASH}};
2136: return undef;
2137: }
2138:
2139: $self->{NAV_HASH} = \%navmaphash;
2140: $self->{PARM_HASH} = \%parmhash;
2141: $self->{PARM_CACHE} = {};
2142: } else {
1.496 raeburn 2143: $self->change_user($self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE});
1.133 bowersj2 2144: }
1.470 foxr 2145:
1.465 foxr 2146: return $self;
2147: }
2148:
2149: #
2150: # In some instances it is useful to be able to dynamically change the
2151: # username/domain associated with a navmap (e.g. to navigate for someone
2152: # else besides the current user...if sufficiently privileged.
2153: # Parameters:
2154: # user - New user.
2155: # domain- Domain the user belongs to.
1.491 raeburn 2156: # code - Anonymous CODE in use.
1.465 foxr 2157: # Implicit inputs:
2158: #
2159: sub change_user {
2160: my $self = shift;
2161: $self->{USERNAME} = shift;
2162: $self->{DOMAIN} = shift;
1.491 raeburn 2163: $self->{CODE} = shift;
1.496 raeburn 2164: $self->{NOHIDE} = shift;
1.465 foxr 2165:
2166: # If the hashes are already tied make sure to break that bond:
2167:
2168: untie %{$self->{NAV_HASH}};
2169: untie %{$self->{PARM_HASH}};
2170:
2171: # The assumption is that we have to
2172: # use lonmap here to re-read the hash and from it reconstruct
2173: # new big and parameter hashes. An implicit assumption at this time
2174: # is that the course file is probably not created locally yet
2175: # an that we will therefore just read without tying.
2176:
2177: my ($cdom, $cnum) = split(/\_/, $env{'request.course.id'});
2178:
2179: my %big_hash;
1.496 raeburn 2180: &Apache::lonmap::loadmap($cnum, $cdom, $self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE}, \%big_hash);
1.465 foxr 2181: $self->{NAV_HASH} = \%big_hash;
2182:
1.470 foxr 2183:
2184:
1.465 foxr 2185: # Now clear the parm cache and reconstruct the parm hash fromt he big_hash
2186: # param.xxxx keys.
2187:
2188: $self->{PARM_CACHE} = {};
1.133 bowersj2 2189:
1.465 foxr 2190: my %parm_hash = {};
1.504 raeburn 2191: foreach my $key (keys(%big_hash)) {
1.465 foxr 2192: if ($key =~ /^param\./) {
2193: my $param_key = $key;
2194: $param_key =~ s/^param\.//;
2195: $parm_hash{$param_key} = $big_hash{$key};
2196: }
1.133 bowersj2 2197: }
2198:
1.465 foxr 2199: $self->{PARM_HASH} = \%parm_hash;
2200:
1.500 raeburn 2201: }
1.133 bowersj2 2202:
1.221 bowersj2 2203: sub generate_course_user_opt {
1.133 bowersj2 2204: my $self = shift;
1.221 bowersj2 2205: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 2206:
1.453 www 2207: my $uname=$self->{USERNAME};
2208: my $udom=$self->{DOMAIN};
2209:
1.320 albertel 2210: my $cid=$env{'request.course.id'};
1.326 albertel 2211: my $cdom=$env{'course.'.$cid.'.domain'};
2212: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2213:
1.133 bowersj2 2214: # ------------------------------------------------- Get coursedata (if present)
1.326 albertel 2215: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2216: # Check for network failure
2217: if (!ref($courseopt)) {
2218: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
1.324 albertel 2219: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2220: }
1.326 albertel 2221: undef($courseopt);
2222: }
1.325 albertel 2223:
1.133 bowersj2 2224: # --------------------------------------------------- Get userdata (if present)
1.325 albertel 2225:
1.326 albertel 2226: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2227: # Check for network failure
2228: if (!ref($useropt)) {
2229: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
1.324 albertel 2230: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2231: }
1.326 albertel 2232: undef($useropt);
1.221 bowersj2 2233: }
2234:
1.326 albertel 2235: $self->{COURSE_OPT} = $courseopt;
2236: $self->{USER_OPT} = $useropt;
2237:
1.221 bowersj2 2238: $self->{COURSE_USER_OPT_GENERATED} = 1;
2239:
2240: return;
2241: }
2242:
1.485 foxr 2243:
2244:
1.221 bowersj2 2245: sub generate_email_discuss_status {
2246: my $self = shift;
1.259 raeburn 2247: my $symb = shift;
1.221 bowersj2 2248: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 2249:
1.320 albertel 2250: my $cid=$env{'request.course.id'};
1.326 albertel 2251: my $cdom=$env{'course.'.$cid.'.domain'};
2252: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2253:
1.454 www 2254: my %emailstatus = &Apache::lonnet::dump('email_status',$self->{DOMAIN},$self->{USERNAME});
1.221 bowersj2 2255: my $logoutTime = $emailstatus{'logout'};
1.320 albertel 2256: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
1.221 bowersj2 2257: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2258: $courseLeaveTime : $logoutTime);
2259: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2260: $cdom, $cnum);
1.259 raeburn 2261: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
1.453 www 2262: $self->{DOMAIN},$self->{USERNAME},'lastread');
1.259 raeburn 2263: my %lastreadtime = ();
1.504 raeburn 2264: foreach my $key (keys(%lastread)) {
1.394 raeburn 2265: my $shortkey = $key;
2266: $shortkey =~ s/_lastread$//;
2267: $lastreadtime{$shortkey} = $lastread{$key};
1.259 raeburn 2268: }
2269:
1.221 bowersj2 2270: my %feedback=();
2271: my %error=();
1.453 www 2272: my @keys = &Apache::lonnet::getkeys('nohist_email',$self->{DOMAIN},
2273: $self->{USERNAME});
1.221 bowersj2 2274:
1.325 albertel 2275: foreach my $msgid (@keys) {
1.295 albertel 2276: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
1.395 raeburn 2277: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
1.509.2.8! raeburn 2278: $symb,$error) = &Apache::lonmsg::unpackmsgid(&LONCAPA::escape($msgid));
1.396 raeburn 2279: &Apache::lonenc::check_decrypt(\$symb);
2280: if (($fromcid ne '') && ($fromcid ne $cid)) {
2281: next;
2282: }
1.395 raeburn 2283: if (defined($symb)) {
2284: if (defined($error) && $error == 1) {
2285: $error{$symb}.=','.$msgid;
2286: } else {
2287: $feedback{$symb}.=','.$msgid;
2288: }
2289: } else {
2290: my $plain=
2291: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
2292: if ($plain=~/ \[([^\]]+)\]\:/) {
2293: my $url=$1;
2294: if ($plain=~/\:Error \[/) {
2295: $error{$url}.=','.$msgid;
2296: } else {
2297: $feedback{$url}.=','.$msgid;
2298: }
2299: }
2300: }
1.221 bowersj2 2301: }
1.211 bowersj2 2302: }
1.221 bowersj2 2303:
1.395 raeburn 2304: #symbs of resources that have feedbacks (will be urls pre-2.3)
1.221 bowersj2 2305: $self->{FEEDBACK} = \%feedback;
1.395 raeburn 2306: #or errors (will be urls pre 2.3)
1.295 albertel 2307: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 2308: $self->{DISCUSSION_TIME} = \%discussiontime;
2309: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 2310: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 2311:
2312: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2313: }
2314:
2315: sub get_user_data {
2316: my $self = shift;
2317: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 2318:
1.221 bowersj2 2319: # Retrieve performance data on problems
1.320 albertel 2320: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
1.453 www 2321: $self->{DOMAIN},
2322: $self->{USERNAME});
1.221 bowersj2 2323: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 2324:
1.221 bowersj2 2325: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 2326: }
2327:
1.354 raeburn 2328: sub get_discussion_data {
2329: my $self = shift;
2330: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
1.366 albertel 2331: return $self->{DISCUSSION_DATA};
1.354 raeburn 2332: }
1.366 albertel 2333:
2334: $self->generate_email_discuss_status();
2335:
1.354 raeburn 2336: my $cid=$env{'request.course.id'};
2337: my $cdom=$env{'course.'.$cid.'.domain'};
2338: my $cnum=$env{'course.'.$cid.'.num'};
2339: # Retrieve discussion data for resources in course
1.367 albertel 2340: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
1.366 albertel 2341:
2342:
1.354 raeburn 2343: $self->{DISCUSSION_DATA} = \%discussion_data;
2344: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2345: return $self->{DISCUSSION_DATA};
2346: }
2347:
2348:
1.133 bowersj2 2349: # Internal function: Takes a key to look up in the nav hash and implements internal
2350: # memory caching of that key.
2351: sub navhash {
2352: my $self = shift; my $key = shift;
2353: return $self->{NAV_HASH}->{$key};
2354: }
2355:
1.217 bowersj2 2356: =pod
2357:
2358: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2359: false otherwise. Undefined course maps indicate an error somewhere in
2360: LON-CAPA, and you will not be able to proceed with using the navmap.
2361: See the B<NAV> screen for an example of using this.
2362:
2363: =cut
2364:
1.133 bowersj2 2365: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2366: sub courseMapDefined {
2367: my $self = shift;
1.320 albertel 2368: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
1.133 bowersj2 2369:
2370: my $firstres = $self->navhash("map_start_$uri");
2371: my $lastres = $self->navhash("map_finish_$uri");
2372: return $firstres && $lastres;
2373: }
2374:
2375: sub getIterator {
2376: my $self = shift;
2377: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.314 albertel 2378: shift, undef, shift,
2379: shift, shift);
1.133 bowersj2 2380: return $iterator;
2381: }
2382:
2383: # Private method: Does the given resource (as a symb string) have
2384: # current discussion? Returns 0 if chat/mail data not extracted.
2385: sub hasDiscussion {
2386: my $self = shift;
2387: my $symb = shift;
1.221 bowersj2 2388: $self->generate_email_discuss_status();
2389:
1.133 bowersj2 2390: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2391:
2392: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2393:
1.323 albertel 2394: # backward compatibility (bulletin boards used to be 'wrapped')
2395: my $ressymb = $self->wrap_symb($symb);
1.259 raeburn 2396: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2397: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2398: } else {
1.266 raeburn 2399: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2400: 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 2401: }
1.133 bowersj2 2402: }
2403:
1.366 albertel 2404: sub last_post_time {
2405: my $self = shift;
2406: my $symb = shift;
2407: my $ressymb = $self->wrap_symb($symb);
2408: return $self->{DISCUSSION_TIME}->{$ressymb};
2409: }
2410:
1.393 raeburn 2411: sub discussion_info {
1.366 albertel 2412: my $self = shift;
2413: my $symb = shift;
1.393 raeburn 2414: my $filter = shift;
1.366 albertel 2415:
2416: $self->get_discussion_data();
1.372 raeburn 2417:
1.366 albertel 2418: my $ressymb = $self->wrap_symb($symb);
1.372 raeburn 2419: # keys used to store bulletinboard postings use 'unwrapped' symb.
1.397 albertel 2420: my $discsymb = &escape($self->unwrap_symb($ressymb));
1.372 raeburn 2421: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
1.366 albertel 2422: if (!$version) { return; }
2423:
2424: my $prevread = $self->{LAST_READ}{$ressymb};
2425:
1.393 raeburn 2426: my $count = 0;
1.366 albertel 2427: my $hiddenflag = 0;
2428: my $deletedflag = 0;
1.393 raeburn 2429: my ($hidden,$deleted,%info);
1.366 albertel 2430:
2431: for (my $id=$version; $id>0; $id--) {
1.372 raeburn 2432: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
1.366 albertel 2433: my @keys=split(/:/,$vkeys);
2434: if (grep(/^hidden$/ ,@keys)) {
2435: if (!$hiddenflag) {
1.372 raeburn 2436: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
1.366 albertel 2437: $hiddenflag = 1;
2438: }
2439: } elsif (grep(/^deleted$/,@keys)) {
2440: if (!$deletedflag) {
1.372 raeburn 2441: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
1.366 albertel 2442: $deletedflag = 1;
2443: }
2444: } else {
1.393 raeburn 2445: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2446: if ($filter eq 'unread') {
2447: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2448: next;
2449: }
2450: }
2451: $count++;
2452: $info{$count}{'subject'} =
2453: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2454: $info{$count}{'id'} = $id;
2455: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2456: }
1.366 albertel 2457: }
2458: }
2459: if (wantarray) {
1.393 raeburn 2460: return ($count,%info);
1.366 albertel 2461: }
1.393 raeburn 2462: return $count;
1.366 albertel 2463: }
2464:
1.321 raeburn 2465: sub wrap_symb {
1.322 albertel 2466: my $self = shift;
1.321 raeburn 2467: my $symb = shift;
1.373 albertel 2468: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
1.322 albertel 2469: unless ($symb =~ m|adm/wrapper/adm|) {
2470: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
1.321 raeburn 2471: }
2472: }
1.322 albertel 2473: return $symb;
1.321 raeburn 2474: }
2475:
1.372 raeburn 2476: sub unwrap_symb {
2477: my $self = shift;
2478: my $ressymb = shift;
2479: my $discsymb = $ressymb;
1.373 albertel 2480: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
1.372 raeburn 2481: $discsymb = $1.$2;
2482: }
2483: return $discsymb;
2484: }
2485:
1.322 albertel 2486: # Private method: Does the given resource (as a symb string) have
2487: # current feedback? Returns the string in the feedback hash, which
2488: # will be false if it does not exist.
2489:
1.133 bowersj2 2490: sub getFeedback {
2491: my $self = shift;
2492: my $symb = shift;
1.395 raeburn 2493: my $source = shift;
1.133 bowersj2 2494:
1.221 bowersj2 2495: $self->generate_email_discuss_status();
2496:
1.133 bowersj2 2497: if (!defined($self->{FEEDBACK})) { return ""; }
2498:
1.395 raeburn 2499: my $feedback;
2500: if ($self->{FEEDBACK}->{$symb}) {
2501: $feedback = $self->{FEEDBACK}->{$symb};
2502: if ($self->{FEEDBACK}->{$source}) {
2503: $feedback .= ','.$self->{FEEDBACK}->{$source};
2504: }
2505: } else {
2506: if ($self->{FEEDBACK}->{$source}) {
2507: $feedback = $self->{FEEDBACK}->{$source};
2508: }
2509: }
2510: return $feedback;
1.133 bowersj2 2511: }
2512:
2513: # Private method: Get the errors for that resource (by source).
2514: sub getErrors {
2515: my $self = shift;
1.395 raeburn 2516: my $symb = shift;
1.133 bowersj2 2517: my $src = shift;
1.221 bowersj2 2518:
2519: $self->generate_email_discuss_status();
2520:
1.133 bowersj2 2521: if (!defined($self->{ERROR_MSG})) { return ""; }
1.395 raeburn 2522:
2523: my $errors;
2524: if ($self->{ERROR_MSG}->{$symb}) {
2525: $errors = $self->{ERROR_MSG}->{$symb};
2526: if ($self->{ERROR_MSG}->{$src}) {
2527: $errors .= ','.$self->{ERROR_MSG}->{$src};
2528: }
2529: } else {
2530: if ($self->{ERROR_MSG}->{$src}) {
2531: $errors = $self->{ERROR_MSG}->{$src};
2532: }
2533: }
2534: return $errors;
1.133 bowersj2 2535: }
2536:
2537: =pod
2538:
1.174 albertel 2539: =item * B<getById>(id):
2540:
2541: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2542: object for that resource. This method, or other methods that use it
2543: (as in the resource object) is the only proper way to obtain a
2544: resource object.
1.133 bowersj2 2545:
1.194 bowersj2 2546: =item * B<getBySymb>(symb):
2547:
2548: Based on the symb of the resource, get a resource object for that
2549: resource. This is one of the proper ways to get a resource object.
2550:
1.448 raeburn 2551: =item * B<getByMapPc>(map_pc):
1.194 bowersj2 2552:
2553: Based on the map_pc of the resource, get a resource object for
2554: the given map. This is one of the proper ways to get a resource object.
2555:
1.133 bowersj2 2556: =cut
2557:
2558: # The strategy here is to cache the resource objects, and only construct them
2559: # as we use them. The real point is to prevent reading any more from the tied
1.398 banghart 2560: # hash than we have to, which should hopefully alleviate speed problems.
1.133 bowersj2 2561:
2562: sub getById {
2563: my $self = shift;
2564: my $id = shift;
2565:
2566: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2567: {
2568: return $self->{RESOURCE_CACHE}->{$id};
2569: }
2570:
2571: # resource handles inserting itself into cache.
2572: # Not clear why the quotes are necessary, but as of this
2573: # writing it doesn't work without them.
2574: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2575: }
1.133 bowersj2 2576:
1.172 bowersj2 2577: sub getBySymb {
2578: my $self = shift;
2579: my $symb = shift;
1.277 matthew 2580:
1.228 albertel 2581: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2582: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2583: my $returnvalue = undef;
2584: if (ref($map)) {
2585: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2586: }
2587: return $returnvalue;
1.194 bowersj2 2588: }
2589:
2590: sub getByMapPc {
2591: my $self = shift;
2592: my $map_pc = shift;
2593: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2594: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2595: return $self->getById($map_id);
1.172 bowersj2 2596: }
2597:
1.133 bowersj2 2598: =pod
2599:
1.174 albertel 2600: =item * B<firstResource>():
2601:
2602: Returns a resource object reference corresponding to the first
2603: resource in the navmap.
1.133 bowersj2 2604:
2605: =cut
2606:
2607: sub firstResource {
2608: my $self = shift;
2609: my $firstResource = $self->navhash('map_start_' .
1.320 albertel 2610: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2611: return $self->getById($firstResource);
1.132 bowersj2 2612: }
1.133 bowersj2 2613:
2614: =pod
2615:
1.174 albertel 2616: =item * B<finishResource>():
2617:
2618: Returns a resource object reference corresponding to the last resource
2619: in the navmap.
1.133 bowersj2 2620:
2621: =cut
2622:
2623: sub finishResource {
2624: my $self = shift;
2625: my $firstResource = $self->navhash('map_finish_' .
1.320 albertel 2626: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2627: return $self->getById($firstResource);
1.132 bowersj2 2628: }
1.133 bowersj2 2629:
2630: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2631: # the actual lookup; parmval caches the results.
2632: sub parmval {
2633: my $self = shift;
1.399 albertel 2634: my ($what,$symb,$recurse)=@_;
1.133 bowersj2 2635: my $hashkey = $what."|||".$symb;
1.459 foxr 2636: my $cache = $self->{PARM_CACHE};
1.133 bowersj2 2637: if (defined($self->{PARM_CACHE}->{$hashkey})) {
1.411 raeburn 2638: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
2639: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
2640: if (wantarray) {
2641: return @{$self->{PARM_CACHE}->{$hashkey}};
2642: } else {
2643: return $self->{PARM_CACHE}->{$hashkey}->[0];
2644: }
2645: }
2646: } else {
2647: return $self->{PARM_CACHE}->{$hashkey};
2648: }
1.133 bowersj2 2649: }
1.399 albertel 2650: my $result = $self->parmval_real($what, $symb, $recurse);
1.133 bowersj2 2651: $self->{PARM_CACHE}->{$hashkey} = $result;
1.405 albertel 2652: if (wantarray) {
1.411 raeburn 2653: return @{$result};
1.405 albertel 2654: }
2655: return $result->[0];
1.132 bowersj2 2656: }
2657:
1.485 foxr 2658:
1.133 bowersj2 2659: sub parmval_real {
2660: my $self = shift;
1.219 albertel 2661: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2662:
1.485 foxr 2663:
1.221 bowersj2 2664: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2665: $self->generate_course_user_opt();
2666:
1.320 albertel 2667: my $cid=$env{'request.course.id'};
2668: my $csec=$env{'request.course.sec'};
1.350 raeburn 2669: my $cgroup='';
2670: my @cgrps=split(/:/,$env{'request.course.groups'});
2671: if (@cgrps > 0) {
2672: @cgrps = sort(@cgrps);
2673: $cgroup = $cgrps[0];
2674: }
1.453 www 2675: my $uname=$self->{USERNAME};
2676: my $udom=$self->{DOMAIN};
1.133 bowersj2 2677:
1.405 albertel 2678: unless ($symb) { return ['']; }
1.133 bowersj2 2679: my $result='';
2680:
1.226 www 2681: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.383 albertel 2682: $mapname = &Apache::lonnet::deversion($mapname);
1.133 bowersj2 2683: # ----------------------------------------------------- Cascading lookup scheme
2684: my $rwhat=$what;
2685: $what=~s/^parameter\_//;
2686: $what=~s/\_/\./;
2687:
2688: my $symbparm=$symb.'.'.$what;
2689: my $mapparm=$mapname.'___(all).'.$what;
1.325 albertel 2690: my $usercourseprefix=$cid;
1.133 bowersj2 2691:
1.485 foxr 2692:
2693:
1.350 raeburn 2694: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2695: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
2696: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2697:
1.485 foxr 2698:
1.133 bowersj2 2699: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2700: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2701: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2702:
1.485 foxr 2703:
1.133 bowersj2 2704: my $courselevel= $usercourseprefix.'.'.$what;
2705: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2706: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2707:
1.485 foxr 2708:
1.133 bowersj2 2709: my $useropt = $self->{USER_OPT};
2710: my $courseopt = $self->{COURSE_OPT};
2711: my $parmhash = $self->{PARM_HASH};
2712:
2713: # ---------------------------------------------------------- first, check user
2714: if ($uname and defined($useropt)) {
1.405 albertel 2715: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2716: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
2717: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
1.133 bowersj2 2718: }
2719:
2720: # ------------------------------------------------------- second, check course
1.350 raeburn 2721: if ($cgroup ne '' and defined($courseopt)) {
1.405 albertel 2722: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2723: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
2724: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
1.350 raeburn 2725: }
2726:
1.133 bowersj2 2727: if ($csec and defined($courseopt)) {
1.405 albertel 2728: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2729: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
2730: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
1.133 bowersj2 2731: }
2732:
2733: if (defined($courseopt)) {
1.405 albertel 2734: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
1.133 bowersj2 2735: }
2736:
2737: # ----------------------------------------------------- third, check map parms
2738:
2739: my $thisparm=$$parmhash{$symbparm};
1.405 albertel 2740: if (defined($thisparm)) { return [$thisparm,'map']; }
1.133 bowersj2 2741:
2742: # ----------------------------------------------------- fourth , check default
2743:
1.246 albertel 2744: my $meta_rwhat=$rwhat;
2745: $meta_rwhat=~s/\./_/g;
2746: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
1.405 albertel 2747: if (defined($default)) { return [$default,'resource']}
1.246 albertel 2748: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.405 albertel 2749: if (defined($default)) { return [$default,'resource']}
1.315 albertel 2750: # --------------------------------------------------- fifth, check more course
2751: if (defined($courseopt)) {
1.405 albertel 2752: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
2753: if (defined($$courseopt{$courselevel})) {
2754: my $ret = [$$courseopt{$courselevel},'course'];
2755: return $ret;
2756: }
1.315 albertel 2757: }
2758: # --------------------------------------------------- sixth , cascade up parts
1.133 bowersj2 2759:
2760: my ($space,@qualifier)=split(/\./,$rwhat);
2761: my $qualifier=join('.',@qualifier);
2762: unless ($space eq '0') {
1.160 albertel 2763: my @parts=split(/_/,$space);
2764: my $id=pop(@parts);
2765: my $part=join('_',@parts);
2766: if ($part eq '') { $part='0'; }
1.405 albertel 2767: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2768: if (defined($partgeneral[0])) { return \@partgeneral; }
1.133 bowersj2 2769: }
1.405 albertel 2770: if ($recurse) { return []; }
1.399 albertel 2771: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
1.405 albertel 2772: if (defined($pack_def)) { return [$pack_def,'resource']; }
2773: return [''];
1.145 bowersj2 2774: }
1.509.2.5 raeburn 2775:
2776: sub recurseup_maps {
2777: my ($self,$mapname) = @_;
2778: my @recurseup;
2779: if ($mapname) {
2780: my $res = $self->getResourceByUrl($mapname);
2781: if (ref($res)) {
2782: my @pcs = split(/,/,$res->map_hierarchy());
2783: shift(@pcs);
2784: if (@pcs) {
2785: @recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
2786: }
2787: }
2788: }
2789: return @recurseup;
2790: }
2791:
1.485 foxr 2792: #
2793: # Determines the open/close dates for printing a map that
2794: # encloses a resource.
2795: #
2796: sub map_printdates {
2797: my ($self, $res, $part) = @_;
2798:
2799:
2800:
2801:
2802:
1.509.2.3 raeburn 2803: my $opendate = $self->get_mapparam($res->symb(),'',"$part.printstartdate");
2804: my $closedate= $self->get_mapparam($res->symb(),'', "$part.printenddate");
1.485 foxr 2805:
2806:
2807: return ($opendate, $closedate);
2808: }
2809:
2810: sub get_mapparam {
1.509.2.3 raeburn 2811: my ($self, $symb, $mapname, $what) = @_;
1.485 foxr 2812:
2813: # Ensure the course option hash is populated:
2814:
2815: $self->generate_course_user_opt();
2816:
2817: # Get the course id and section if there is one.
2818:
2819: my $cid=$env{'request.course.id'};
2820: my $csec=$env{'request.course.sec'};
2821: my $cgroup='';
2822: my @cgrps=split(/:/,$env{'request.course.groups'});
2823: if (@cgrps > 0) {
2824: @cgrps = sort(@cgrps);
2825: $cgroup = $cgrps[0];
2826: }
2827: my $uname=$self->{USERNAME};
2828: my $udom=$self->{DOMAIN};
2829:
1.509.2.3 raeburn 2830: unless ($symb || $mapname) { return; }
1.485 foxr 2831: my $result='';
1.509.2.3 raeburn 2832: my ($recursed,@recurseup);
1.485 foxr 2833:
2834: # Figure out which map we are in.
2835:
1.509.2.3 raeburn 2836: if ($symb && !$mapname) {
2837: my ($id,$fn);
2838: ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
2839: $mapname = &Apache::lonnet::deversion($mapname);
2840: }
1.485 foxr 2841:
2842: my $rwhat=$what;
2843: $what=~s/^parameter\_//;
2844: $what=~s/\_/\./;
2845:
2846: # Build the hash keys for the lookup:
2847:
2848: my $symbparm=$symb.'.'.$what;
2849: my $mapparm=$mapname.'___(all).'.$what;
2850: my $usercourseprefix=$cid;
2851:
2852:
2853: my $grplevel = "$usercourseprefix.[$cgroup].$mapparm";
2854: my $seclevel = "$usercourseprefix.[$csec].$mapparm";
2855: my $courselevel = "$usercourseprefix.$mapparm";
2856:
2857:
2858: # Get handy references to the hashes we need in $self:
2859:
2860: my $useropt = $self->{USER_OPT};
2861: my $courseopt = $self->{COURSE_OPT};
2862: my $parmhash = $self->{PARM_HASH};
2863:
2864: # Check per user
2865:
2866:
2867:
2868: if ($uname and defined($useropt)) {
2869: if (defined($$useropt{$courselevel})) {
2870: return $$useropt{$courselevel};
2871: }
1.509.2.5 raeburn 2872: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2873: unless ($recursed) {
2874: @recurseup = $self->recurseup_maps($mapname);
2875: $recursed = 1;
2876: }
2877: foreach my $item (@recurseup) {
2878: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2879: if (defined($$useropt{$norecursechk})) {
2880: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2881: return $$useropt{$norecursechk};
2882: }
2883: }
2884: }
2885: }
1.485 foxr 2886: }
2887:
2888: # Check course -- group
2889:
2890:
2891:
2892: if ($cgroup ne '' and defined ($courseopt)) {
2893: if (defined($$courseopt{$grplevel})) {
2894: return $$courseopt{$grplevel};
2895: }
1.509.2.5 raeburn 2896: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2897: unless ($recursed) {
2898: @recurseup = $self->recurseup_maps($mapname);
2899: $recursed = 1;
2900: }
2901: foreach my $item (@recurseup) {
2902: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
2903: if (defined($$courseopt{$norecursechk})) {
2904: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2905: return $$courseopt{$norecursechk};
2906: }
2907: }
2908: }
2909: }
1.485 foxr 2910: }
2911:
2912: # Check course -- section
2913:
2914:
2915:
2916:
2917:
2918: if ($csec and defined($courseopt)) {
2919: if (defined($$courseopt{$seclevel})) {
2920: return $$courseopt{$seclevel};
2921: }
1.509.2.5 raeburn 2922: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2923: unless ($recursed) {
2924: @recurseup = $self->recurseup_maps($mapname);
2925: $recursed = 1;
2926: }
2927: foreach my $item (@recurseup) {
2928: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
2929: if (defined($$courseopt{$norecursechk})) {
2930: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2931: return $$courseopt{$norecursechk};
2932: }
2933: }
2934: }
2935: }
1.485 foxr 2936: }
2937: # Check the map parameters themselves:
2938:
1.509.2.3 raeburn 2939: if ($symb) {
2940: my $symbparm=$symb.'.'.$what;
2941: my $thisparm = $$parmhash{$symbparm};
2942: if (defined($thisparm)) {
2943: return $thisparm;
2944: }
1.485 foxr 2945: }
2946:
2947:
2948: # Additional course parameters:
2949:
2950: if (defined($courseopt)) {
2951: if (defined($$courseopt{$courselevel})) {
2952: return $$courseopt{$courselevel};
2953: }
1.509.2.5 raeburn 2954: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2955: unless ($recursed) {
2956: @recurseup = $self->recurseup_maps($mapname);
2957: $recursed = 1;
2958: }
2959: foreach my $item (@recurseup) {
2960: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2961: if (defined($$courseopt{$norecursechk})) {
2962: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2963: return $$courseopt{$norecursechk};
2964: }
2965: }
2966: }
2967: }
1.485 foxr 2968: }
2969: return undef; # Unefined if we got here.
2970: }
2971:
2972: sub course_printdates {
2973: my ($self, $symb, $part) = @_;
2974:
2975:
2976: my $opendate = $self->getcourseparam($symb, $part . '.printstartdate');
2977: my $closedate = $self->getcourseparam($symb, $part . '.printenddate');
2978: return ($opendate, $closedate);
2979:
2980: }
2981:
2982: sub getcourseparam {
2983: my ($self, $symb, $what) = @_;
2984:
2985: $self->generate_course_user_opt(); # If necessary populate the hashes.
2986:
2987: my $uname = $self->{USERNAME};
2988: my $udom = $self->{DOMAIN};
2989:
2990: # Course, section, group ids come from the env:
2991:
2992: my $cid = $env{'request.course.id'};
2993: my $csec = $env{'request.course.sec'};
2994: my $cgroup = ''; # Assume no group
2995:
2996: my @cgroups = split(/:/, $env{'request.course.groups'});
2997: if(@cgroups > 0) {
2998: @cgroups = sort(@cgroups);
2999: $cgroup = $cgroups[0]; # There is a course group.
3000: }
3001: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
3002: $mapname = &Apache::lonnet::deversion($mapname);
3003:
3004: #
3005: # Make the various lookup keys:
3006: #
3007:
3008: $what=~s/^parameter\_//;
3009: $what=~s/\_/\./;
3010:
3011:
3012: my $symbparm = $symb . '.' . $what;
3013: my $mapparm=$mapname.'___(all).'.$what;
3014:
3015: # Local refs to the hashes we're going to look at:
3016:
3017: my $useropt = $self->{USER_OPT};
3018: my $courseopt = $self->{COURSE_OPT};
3019:
3020: #
3021: # We want the course level stuff from the way
3022: # parmval_real operates
1.509.2.1 raeburn 3023: # TODO: Factor some of this stuff out of
1.485 foxr 3024: # both parmval_real and here
3025: #
3026: my $courselevel = $cid . '.' . $what;
3027: my $grplevel = $cid . '.[' . $cgroup . ']' . $what;
3028: my $seclevel = $cid . '.[' . $csec . ']' . $what;
3029:
3030:
3031: # Try for the user's course level option:
3032:
3033: if ($uname and defined($useropt)) {
3034: if (defined($$useropt{$courselevel})) {
3035: return $$useropt{$courselevel};
3036: }
3037: }
3038: # Try for the group's course level option:
3039:
1.509.2.1 raeburn 3040: if ($cgroup ne '' and defined($courseopt)) {
1.485 foxr 3041: if (defined($$courseopt{$grplevel})) {
3042: return $$courseopt{$grplevel};
3043: }
3044: }
3045:
3046: # Try for section level parameters:
3047:
1.509.2.1 raeburn 3048: if ($csec ne '' and defined($courseopt)) {
1.485 foxr 3049: if (defined($$courseopt{$seclevel})) {
3050: return $$courseopt{$seclevel};
3051: }
3052: }
1.509.2.1 raeburn 3053: # Try for 'additional' course parameters:
1.485 foxr 3054:
3055: if (defined($courseopt)) {
3056: if (defined($$courseopt{$courselevel})) {
3057: return $$courseopt{$courselevel};
3058: }
3059: }
3060: return undef;
3061:
3062: }
3063:
1.145 bowersj2 3064:
1.174 albertel 3065: =pod
1.145 bowersj2 3066:
1.352 raeburn 3067: =item * B<getResourceByUrl>(url,multiple):
1.145 bowersj2 3068:
1.352 raeburn 3069: Retrieves a resource object by URL of the resource, unless the optional
1.398 banghart 3070: multiple parameter is included in which case an array of resource
1.352 raeburn 3071: objects is returned. If passed a resource object, it will simply return
3072: it, so it is safe to use this method in code like
3073: "$res = $navmap->getResourceByUrl($res)"
3074: if you're not sure if $res is already an object, or just a URL. If the
3075: resource appears multiple times in the course, only the first instance
3076: will be returned (useful for maps), unless the multiple parameter has
3077: been included, in which case all instances are returned in an array.
1.174 albertel 3078:
1.505 raeburn 3079: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall, noblockcheck):
1.174 albertel 3080:
3081: The map is a specification of a map to retreive the resources from,
3082: either as a url or as an object. The filterFunc is a reference to a
3083: function that takes a resource object as its one argument and returns
3084: true if the resource should be included, or false if it should not
3085: be. If recursive is true, the map will be recursively examined,
3086: otherwise it will not be. If bailout is true, the function will return
1.314 albertel 3087: as soon as it finds a resource, if false it will finish. If showall is
1.505 raeburn 3088: true it will not hide maps that contain nothing but one other map. The
3089: noblockcheck arg is propagated to become the sixth arg in the call to
3090: lonnet::allowed when checking a resource's availability during collection
3091: of resources using the iterator. noblockcheck needs to be true if
3092: retrieveResources() was called by a routine that itself was called by
3093: lonnet::allowed, in order to avoid recursion. By default the map
3094: is the top-level map of the course, filterFunc is a function that
3095: always returns 1, recursive is true, bailout is false, showall is
3096: false. The resources will be returned in a list containing the
3097: resource objects for the corresponding resources, with B<no structure
3098: information> in the list; regardless of branching, recursion, etc.,
3099: it will be a flat list.
1.174 albertel 3100:
3101: Thus, this is suitable for cases where you don't want the structure,
3102: just a list of all resources. It is also suitable for finding out how
3103: many resources match a given description; for this use, if all you
3104: want to know is if I<any> resources match the description, the bailout
3105: parameter will allow you to avoid potentially expensive enumeration of
3106: all matching resources.
1.145 bowersj2 3107:
1.318 albertel 3108: =item * B<hasResource>(map, filterFunc, recursive, showall):
1.145 bowersj2 3109:
1.398 banghart 3110: Convenience method for
1.146 bowersj2 3111:
1.318 albertel 3112: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
1.146 bowersj2 3113:
1.174 albertel 3114: which will tell whether the map has resources matching the description
3115: in the filter function.
1.146 bowersj2 3116:
1.352 raeburn 3117: =item * B<usedVersion>(url):
3118:
3119: Retrieves version infomation for a url. Returns the version (a number, or
3120: the string "mostrecent") for resources which have version information in
3121: the big hash.
1.448 raeburn 3122:
1.145 bowersj2 3123: =cut
3124:
1.277 matthew 3125:
1.145 bowersj2 3126: sub getResourceByUrl {
3127: my $self = shift;
3128: my $resUrl = shift;
1.352 raeburn 3129: my $multiple = shift;
1.145 bowersj2 3130:
3131: if (ref($resUrl)) { return $resUrl; }
3132:
3133: $resUrl = &Apache::lonnet::clutter($resUrl);
3134: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
1.352 raeburn 3135: if (!$resId) { return ''; }
3136: if ($multiple) {
3137: my @resources = ();
3138: my @resIds = split (/,/, $resId);
3139: foreach my $id (@resIds) {
1.353 raeburn 3140: my $resourceId = $self->getById($id);
3141: if ($resourceId) {
3142: push(@resources,$resourceId);
1.352 raeburn 3143: }
3144: }
3145: return @resources;
3146: } else {
3147: if ($resId =~ /,/) {
3148: $resId = (split (/,/, $resId))[0];
3149: }
3150: return $self->getById($resId);
1.145 bowersj2 3151: }
3152: }
3153:
3154: sub retrieveResources {
3155: my $self = shift;
3156: my $map = shift;
3157: my $filterFunc = shift;
3158: if (!defined ($filterFunc)) {
3159: $filterFunc = sub {return 1;};
3160: }
3161: my $recursive = shift;
3162: if (!defined($recursive)) { $recursive = 1; }
3163: my $bailout = shift;
3164: if (!defined($bailout)) { $bailout = 0; }
1.314 albertel 3165: my $showall = shift;
1.506 raeburn 3166: my $noblockcheck = shift;
1.145 bowersj2 3167: # Create the necessary iterator.
3168: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 3169: $map = $self->getResourceByUrl($map);
1.145 bowersj2 3170: }
3171:
1.213 bowersj2 3172: # If nothing was passed, assume top-level map
3173: if (!$map) {
3174: $map = $self->getById('0.0');
3175: }
3176:
1.145 bowersj2 3177: # Check the map's validity.
1.213 bowersj2 3178: if (!$map->is_map()) {
1.145 bowersj2 3179: # Oh, to throw an exception.... how I'd love that!
3180: return ();
3181: }
3182:
1.146 bowersj2 3183: # Get an iterator.
3184: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.314 albertel 3185: undef, $recursive, $showall);
1.146 bowersj2 3186:
3187: my @resources = ();
3188:
1.400 albertel 3189: if (&$filterFunc($map)) {
3190: push(@resources, $map);
3191: }
3192:
1.146 bowersj2 3193: # Run down the iterator and collect the resources.
1.222 bowersj2 3194: my $curRes;
3195:
1.505 raeburn 3196: while ($curRes = $it->next(undef,$noblockcheck)) {
1.146 bowersj2 3197: if (ref($curRes)) {
3198: if (!&$filterFunc($curRes)) {
3199: next;
3200: }
3201:
1.400 albertel 3202: push(@resources, $curRes);
1.146 bowersj2 3203:
3204: if ($bailout) {
3205: return @resources;
3206: }
3207: }
3208:
3209: }
3210:
3211: return @resources;
3212: }
3213:
3214: sub hasResource {
3215: my $self = shift;
3216: my $map = shift;
3217: my $filterFunc = shift;
3218: my $recursive = shift;
1.318 albertel 3219: my $showall = shift;
1.146 bowersj2 3220:
1.318 albertel 3221: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
1.133 bowersj2 3222: }
1.51 bowersj2 3223:
1.352 raeburn 3224: sub usedVersion {
3225: my $self = shift;
3226: my $linkurl = shift;
3227: return $self->navhash("version_$linkurl");
3228: }
3229:
1.51 bowersj2 3230: 1;
3231:
3232: package Apache::lonnavmaps::iterator;
1.365 albertel 3233: use Scalar::Util qw(weaken);
1.320 albertel 3234: use Apache::lonnet;
3235:
1.51 bowersj2 3236: =pod
3237:
3238: =back
3239:
1.174 albertel 3240: =head1 Object: navmap Iterator
1.51 bowersj2 3241:
1.174 albertel 3242: An I<iterator> encapsulates the logic required to traverse a data
3243: structure. navmap uses an iterator to traverse the course map
3244: according to the criteria you wish to use.
3245:
3246: To obtain an iterator, call the B<getIterator>() function of a
3247: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
3248: directly.) This will return a reference to the iterator:
1.51 bowersj2 3249:
3250: C<my $resourceIterator = $navmap-E<gt>getIterator();>
3251:
3252: To get the next thing from the iterator, call B<next>:
3253:
3254: C<my $nextThing = $resourceIterator-E<gt>next()>
3255:
3256: getIterator behaves as follows:
3257:
3258: =over 4
3259:
1.174 albertel 3260: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
3261:
3262: All parameters are optional. firstResource is a resource reference
3263: corresponding to where the iterator should start. It defaults to
3264: navmap->firstResource() for the corresponding nav map. finishResource
3265: corresponds to where you want the iterator to end, defaulting to
3266: navmap->finishResource(). filterHash is a hash used as a set
3267: containing strings representing the resource IDs, defaulting to
3268: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 3269: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 3270: recursed on. If it is a 1, only resources NOT in the filterHash will
3271: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
3272: false (default), the iterator will only return the first level of map
3273: that is not just a single, 'redirecting' map. If true, the iterator
3274: will return all information, starting with the top-level map,
3275: regardless of content. returnTopMap, if true (default false), will
3276: cause the iterator to return the top-level map object (resource 0.0)
3277: before anything else.
3278:
3279: Thus, by default, only top-level resources will be shown. Change the
3280: condition to a 1 without changing the hash, and all resources will be
3281: shown. Changing the condition to 1 and including some values in the
3282: hash will allow you to selectively suppress parts of the navmap, while
3283: leaving it on 0 and adding things to the hash will allow you to
3284: selectively add parts of the nav map. See the handler code for
3285: examples.
3286:
3287: The iterator will return either a reference to a resource object, or a
3288: token representing something in the map, such as the beginning of a
3289: new branch. The possible tokens are:
3290:
3291: =over 4
1.51 bowersj2 3292:
1.222 bowersj2 3293: =item * B<END_ITERATOR>:
3294:
3295: The iterator has returned all that it's going to. Further calls to the
3296: iterator will just produce more of these. This is a "false" value, and
3297: is the only false value the iterator which will be returned, so it can
3298: be used as a loop sentinel.
3299:
1.217 bowersj2 3300: =item * B<BEGIN_MAP>:
1.51 bowersj2 3301:
1.174 albertel 3302: A new map is being recursed into. This is returned I<after> the map
3303: resource itself is returned.
1.51 bowersj2 3304:
1.217 bowersj2 3305: =item * B<END_MAP>:
1.174 albertel 3306:
3307: The map is now done.
1.51 bowersj2 3308:
1.217 bowersj2 3309: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 3310:
1.174 albertel 3311: A branch is now starting. The next resource returned will be the first
3312: in that branch.
1.70 bowersj2 3313:
1.217 bowersj2 3314: =item * B<END_BRANCH>:
1.70 bowersj2 3315:
1.174 albertel 3316: The branch is now done.
1.51 bowersj2 3317:
3318: =back
3319:
1.174 albertel 3320: The tokens are retreivable via methods on the iterator object, i.e.,
3321: $iterator->END_MAP.
1.70 bowersj2 3322:
1.174 albertel 3323: Maps can contain empty resources. The iterator will automatically skip
3324: over such resources, but will still treat the structure
3325: correctly. Thus, a complicated map with several branches, but
3326: consisting entirely of empty resources except for one beginning or
3327: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
3328: but only one resource will be returned.
1.116 bowersj2 3329:
1.242 matthew 3330: =back
3331:
1.222 bowersj2 3332: =head2 Normal Usage
3333:
3334: Normal usage of the iterator object is to do the following:
3335:
3336: my $it = $navmap->getIterator([your params here]);
3337: my $curRes;
3338: while ($curRes = $it->next()) {
3339: [your logic here]
3340: }
3341:
3342: Note that inside of the loop, it's frequently useful to check if
3343: "$curRes" is a reference or not with the reference function; only
3344: resource objects will be references, and any non-references will
3345: be the tokens described above.
3346:
1.505 raeburn 3347: The next() routine can take two (optional) arguments:
3348: closeAllPages - if true will not recurse down a .page
3349: noblockcheck - passed to browsePriv() for passing as sixth arg to
3350: call to lonnet::allowed. This needs to be set if retrieveResources
3351: was already called from another routine called within lonnet::allowed,
3352: so as to prevent recursion.
3353:
1.506 raeburn 3354: Also note there is some old code floating around that tries to track
1.222 bowersj2 3355: the depth of the iterator to see when it's done; do not copy that
1.398 banghart 3356: code. It is difficult to get right and harder to understand than
1.222 bowersj2 3357: this. They should be migrated to this new style.
1.51 bowersj2 3358:
3359: =cut
3360:
3361: # Here are the tokens for the iterator:
3362:
1.222 bowersj2 3363: sub END_ITERATOR { return 0; }
1.51 bowersj2 3364: sub BEGIN_MAP { return 1; } # begining of a new map
3365: sub END_MAP { return 2; } # end of the map
3366: sub BEGIN_BRANCH { return 3; } # beginning of a branch
3367: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 3368: sub FORWARD { return 1; } # go forward
3369: sub BACKWARD { return 2; }
1.51 bowersj2 3370:
1.96 bowersj2 3371: sub min {
3372: (my $a, my $b) = @_;
3373: if ($a < $b) { return $a; } else { return $b; }
3374: }
3375:
1.94 bowersj2 3376: sub new {
3377: # magic invocation to create a class instance
3378: my $proto = shift;
3379: my $class = ref($proto) || $proto;
3380: my $self = {};
3381:
1.300 albertel 3382: weaken($self->{NAV_MAP} = shift);
1.94 bowersj2 3383: return undef unless ($self->{NAV_MAP});
3384:
1.454 www 3385: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3386: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3387:
1.94 bowersj2 3388: # Handle the parameters
3389: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3390: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3391:
3392: # If the given resources are just the ID of the resource, get the
3393: # objects
3394: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3395: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3396: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3397: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3398:
3399: $self->{FILTER} = shift;
3400:
3401: # A hash, used as a set, of resource already seen
3402: $self->{ALREADY_SEEN} = shift;
3403: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
3404: $self->{CONDITION} = shift;
3405:
1.116 bowersj2 3406: # Do we want to automatically follow "redirection" maps?
3407: $self->{FORCE_TOP} = shift;
3408:
1.162 bowersj2 3409: # Do we want to return the top-level map object (resource 0.0)?
3410: $self->{RETURN_0} = shift;
3411: # have we done that yet?
3412: $self->{HAVE_RETURNED_0} = 0;
3413:
1.94 bowersj2 3414: # Now, we need to pre-process the map, by walking forward and backward
3415: # over the parts of the map we're going to look at.
1.96 bowersj2 3416:
1.97 bowersj2 3417: # The processing steps are exactly the same, except for a few small
3418: # changes, so I bundle those up in the following list of two elements:
3419: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
3420: # first_resource).
3421: # This prevents writing nearly-identical code twice.
3422: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
3423: 'FIRST_RESOURCE'],
3424: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
3425: 'FINISH_RESOURCE'] );
3426:
1.98 bowersj2 3427: my $maxDepth = 0; # tracks max depth
3428:
1.116 bowersj2 3429: # If there is only one resource in this map, and it's a map, we
3430: # want to remember that, so the user can ask for the first map
3431: # that isn't just a redirector.
3432: my $resource; my $resourceCount = 0;
3433:
1.209 bowersj2 3434: # Documentation on this algorithm can be found in the CVS repository at
3435: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
3436: # in that file.
1.107 bowersj2 3437: # **1**
3438:
1.97 bowersj2 3439: foreach my $pass (@iterations) {
3440: my $direction = $pass->[0];
3441: my $valName = $pass->[1];
3442: my $nextResourceMethod = $pass->[2];
3443: my $firstResourceName = $pass->[3];
3444:
3445: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
3446: $self->{FIRST_RESOURCE},
3447: $self->{FINISH_RESOURCE},
3448: {}, undef, 0, $direction);
1.96 bowersj2 3449:
1.97 bowersj2 3450: # prime the recursion
3451: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 3452: $iterator->next();
1.97 bowersj2 3453: my $curRes = $iterator->next();
1.222 bowersj2 3454: my $depth = 1;
3455: while ($depth > 0) {
3456: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
3457: if ($curRes == $iterator->END_MAP()) { $depth--; }
3458:
1.97 bowersj2 3459: if (ref($curRes)) {
1.116 bowersj2 3460: # If there's only one resource, this will save it
1.117 bowersj2 3461: # we have to filter empty resources from consideration here,
3462: # or even "empty", redirecting maps have two (start & finish)
3463: # or three (start, finish, plus redirector)
3464: if($direction == FORWARD && $curRes->src()) {
3465: $resource = $curRes; $resourceCount++;
3466: }
1.97 bowersj2 3467: my $resultingVal = $curRes->{DATA}->{$valName};
3468: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 3469: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 3470:
1.116 bowersj2 3471: if ($nextCount == 1) { # **3**
1.97 bowersj2 3472: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
3473: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
3474: }
3475:
1.116 bowersj2 3476: if ($nextCount > 1) { # **4**
1.97 bowersj2 3477: foreach my $res (@{$nextResources}) {
3478: my $current = $res->{DATA}->{$valName} || 999999999;
3479: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
3480: }
3481: }
3482: }
1.96 bowersj2 3483:
1.107 bowersj2 3484: # Assign the final val (**2**)
1.97 bowersj2 3485: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 3486: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
3487: $curRes->{DATA}->{BOT_UP_VAL});
3488:
3489: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
3490: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 3491: }
1.222 bowersj2 3492:
3493: $curRes = $iterator->next();
1.96 bowersj2 3494: }
3495: }
1.94 bowersj2 3496:
1.116 bowersj2 3497: # Check: Was this only one resource, a map?
1.255 albertel 3498: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 3499: my $firstResource = $resource->map_start();
3500: my $finishResource = $resource->map_finish();
1.500 raeburn 3501: return Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3502: $finishResource, $self->{FILTER},
3503: $self->{ALREADY_SEEN},
3504: $self->{CONDITION},
3505: $self->{FORCE_TOP});
1.116 bowersj2 3506: }
3507:
1.98 bowersj2 3508: # Set up some bookkeeping information.
3509: $self->{CURRENT_DEPTH} = 0;
3510: $self->{MAX_DEPTH} = $maxDepth;
3511: $self->{STACK} = [];
3512: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 3513: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 3514:
3515: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
3516: push @{$self->{STACK}}, [];
3517: }
3518:
1.107 bowersj2 3519: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 3520: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
3521: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
3522:
3523: bless ($self);
3524: return $self;
3525: }
3526:
3527: sub next {
3528: my $self = shift;
1.256 albertel 3529: my $closeAllPages=shift;
1.505 raeburn 3530: my $noblockcheck = shift;
1.222 bowersj2 3531: if ($self->{FINISHED}) {
3532: return END_ITERATOR();
3533: }
3534:
1.162 bowersj2 3535: # If we want to return the top-level map object, and haven't yet,
3536: # do so.
3537: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
3538: $self->{HAVE_RETURNED_0} = 1;
1.470 foxr 3539: my $nextTopLevel = $self->{NAV_MAP}->getById('0.0');
1.162 bowersj2 3540: return $self->{NAV_MAP}->getById('0.0');
3541: }
1.401 albertel 3542: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
3543: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
3544: return $self->BEGIN_MAP();
3545: }
1.98 bowersj2 3546:
3547: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3548: # grab the next from the recursive iterator
1.256 albertel 3549: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 3550:
3551: # is it a begin or end map? If so, update the depth
3552: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3553: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3554:
3555: # Are we back at depth 0? If so, stop recursing
3556: if ($self->{RECURSIVE_DEPTH} == 0) {
3557: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3558: }
3559: return $next;
3560: }
3561:
3562: if (defined($self->{FORCE_NEXT})) {
3563: my $tmp = $self->{FORCE_NEXT};
3564: $self->{FORCE_NEXT} = undef;
3565: return $tmp;
3566: }
3567:
3568: # Have we not yet begun? If not, return BEGIN_MAP and
3569: # remember we've started.
3570: if ( !$self->{STARTED} ) {
3571: $self->{STARTED} = 1;
3572: return $self->BEGIN_MAP();
3573: }
3574:
3575: # Here's the guts of the iterator.
3576:
3577: # Find the next resource, if any.
3578: my $found = 0;
3579: my $i = $self->{MAX_DEPTH};
3580: my $newDepth;
3581: my $here;
3582: while ( $i >= 0 && !$found ) {
1.107 bowersj2 3583: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3584: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 3585: $found = 1;
3586: $newDepth = $i;
3587: }
3588: $i--;
3589: }
3590:
3591: # If we still didn't find anything, we're done.
3592: if ( !$found ) {
3593: # We need to get back down to the correct branch depth
3594: if ( $self->{CURRENT_DEPTH} > 0 ) {
3595: $self->{CURRENT_DEPTH}--;
3596: return END_BRANCH();
3597: } else {
1.222 bowersj2 3598: $self->{FINISHED} = 1;
1.98 bowersj2 3599: return END_MAP();
3600: }
3601: }
3602:
1.104 bowersj2 3603: # If this is not a resource, it must be an END_BRANCH marker we want
3604: # to return directly.
1.107 bowersj2 3605: if (!ref($here)) { # **8**
1.104 bowersj2 3606: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3607: $self->{CURRENT_DEPTH}--;
3608: return $here;
3609: }
3610: }
3611:
3612: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3613: $self->{HERE} = $here;
3614:
1.98 bowersj2 3615: # Get to the right level
3616: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3617: push @{$self->{STACK}->[$newDepth]}, $here;
3618: $self->{CURRENT_DEPTH}--;
3619: return END_BRANCH();
3620: }
3621: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3622: push @{$self->{STACK}->[$newDepth]}, $here;
3623: $self->{CURRENT_DEPTH}++;
3624: return BEGIN_BRANCH();
3625: }
3626:
3627: # If we made it here, we have the next resource, and we're at the
3628: # right branch level. So let's examine the resource for where
3629: # we can get to from here.
3630:
3631: # So we need to look at all the resources we can get to from here,
3632: # categorize them if we haven't seen them, remember if we have a new
3633: my $nextUnfiltered = $here->getNext();
1.470 foxr 3634:
3635:
1.104 bowersj2 3636: my $maxDepthAdded = -1;
3637:
1.98 bowersj2 3638: for (@$nextUnfiltered) {
3639: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 3640: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3641: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 3642: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 3643: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 3644: }
3645: }
1.104 bowersj2 3646:
3647: # Is this the end of a branch? If so, all of the resources examined above
1.398 banghart 3648: # led to lower levels than the one we are currently at, so we push a END_BRANCH
1.104 bowersj2 3649: # marker onto the stack so we don't forget.
3650: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3651: # BC branch and gets to C, it will see F as the only next resource, but it's
3652: # one level lower. Thus, this is the end of the branch, since there are no
3653: # more resources added to this level or above.
1.111 bowersj2 3654: # We don't do this if the examined resource is the finish resource,
3655: # because the condition given above is true, but the "END_MAP" will
3656: # take care of things and we should already be at depth 0.
1.104 bowersj2 3657: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3658: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3659: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3660: }
3661:
1.98 bowersj2 3662: # That ends the main iterator logic. Now, do we want to recurse
3663: # down this map (if this resource is a map)?
1.256 albertel 3664: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3665: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3666: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3667: my $firstResource = $self->{HERE}->map_start();
3668: my $finishResource = $self->{HERE}->map_finish();
3669: $self->{RECURSIVE_ITERATOR} =
3670: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3671: $finishResource, $self->{FILTER},
1.314 albertel 3672: $self->{ALREADY_SEEN},
3673: $self->{CONDITION},
3674: $self->{FORCE_TOP});
1.98 bowersj2 3675: }
3676:
1.116 bowersj2 3677: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3678: # Should you ever find you need it, make sure to add an option to the code
3679: # that you can use; other things depend on this behavior.
1.505 raeburn 3680: my $browsePriv = $self->{HERE}->browsePriv($noblockcheck);
1.138 bowersj2 3681: if (!$self->{HERE}->src() ||
3682: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3683: return $self->next($closeAllPages);
1.116 bowersj2 3684: }
3685:
1.98 bowersj2 3686: return $self->{HERE};
3687:
3688: }
3689:
3690: =pod
3691:
1.174 albertel 3692: The other method available on the iterator is B<getStack>, which
3693: returns an array populated with the current 'stack' of maps, as
3694: references to the resource objects. Example: This is useful when
3695: making the navigation map, as we need to check whether we are under a
3696: page map to see if we need to link directly to the resource, or to the
3697: page. The first elements in the array will correspond to the top of
3698: the stack (most inclusive map).
1.98 bowersj2 3699:
3700: =cut
3701:
3702: sub getStack {
3703: my $self=shift;
3704:
3705: my @stack;
3706:
3707: $self->populateStack(\@stack);
3708:
3709: return \@stack;
3710: }
3711:
3712: # Private method: Calls the iterators recursively to populate the stack.
3713: sub populateStack {
3714: my $self=shift;
3715: my $stack = shift;
3716:
3717: push @$stack, $self->{HERE} if ($self->{HERE});
3718:
3719: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3720: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3721: }
1.94 bowersj2 3722: }
3723:
3724: 1;
3725:
3726: package Apache::lonnavmaps::DFSiterator;
1.365 albertel 3727: use Scalar::Util qw(weaken);
1.320 albertel 3728: use Apache::lonnet;
3729:
1.100 bowersj2 3730: # Not documented in the perldoc: This is a simple iterator that just walks
3731: # through the nav map and presents the resources in a depth-first search
3732: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3733: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3734: # useful for pre-processing of some kind, and is in fact used by the main
3735: # iterator that way, but that's about it.
3736: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3737: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3738: # use might be found for it. - Jeremy
1.94 bowersj2 3739:
1.117 bowersj2 3740: # Unlike the main iterator, this DOES return all resources, even blank ones.
3741: # The main iterator needs them to correctly preprocess the map.
3742:
1.94 bowersj2 3743: sub BEGIN_MAP { return 1; } # begining of a new map
3744: sub END_MAP { return 2; } # end of the map
3745: sub FORWARD { return 1; } # go forward
3746: sub BACKWARD { return 2; }
3747:
1.100 bowersj2 3748: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3749: # filter hash ref (or undef), already seen hash or undef, condition
3750: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3751: sub new {
3752: # magic invocation to create a class instance
3753: my $proto = shift;
3754: my $class = ref($proto) || $proto;
3755: my $self = {};
3756:
1.300 albertel 3757: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3758: return undef unless ($self->{NAV_MAP});
3759:
1.454 www 3760: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3761: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3762:
1.51 bowersj2 3763: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3764: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3765:
3766: # If the given resources are just the ID of the resource, get the
3767: # objects
3768: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3769: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3770: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3771: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3772:
3773: $self->{FILTER} = shift;
3774:
3775: # A hash, used as a set, of resource already seen
3776: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3777: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3778: $self->{CONDITION} = shift;
1.89 bowersj2 3779: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3780:
1.100 bowersj2 3781: # Flag: Have we started yet?
1.51 bowersj2 3782: $self->{STARTED} = 0;
3783:
3784: # Should we continue calling the recursive iterator, if any?
3785: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3786: # The recursive iterator, if any
3787: $self->{RECURSIVE_ITERATOR} = undef;
3788: # Are we recursing on a map, or a branch?
3789: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3790: # And the count of how deep it is, so that this iterator can keep track of
3791: # when to pick back up again.
3792: $self->{RECURSIVE_DEPTH} = 0;
3793:
3794: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3795: $self->{STACK} = [];
1.51 bowersj2 3796:
3797: # Start with the first resource
1.89 bowersj2 3798: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3799: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3800: } else {
1.100 bowersj2 3801: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3802: }
1.51 bowersj2 3803:
3804: bless($self);
3805: return $self;
3806: }
3807:
3808: sub next {
3809: my $self = shift;
3810:
3811: # Are we using a recursive iterator? If so, pull from that and
3812: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3813: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3814: # grab the next from the recursive iterator
3815: my $next = $self->{RECURSIVE_ITERATOR}->next();
3816:
3817: # is it a begin or end map? Update depth if so
3818: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3819: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3820:
3821: # Are we back at depth 0? If so, stop recursing.
3822: if ($self->{RECURSIVE_DEPTH} == 0) {
3823: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3824: }
3825:
3826: return $next;
3827: }
3828:
3829: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3830: # END_MAP, which will end the iterator.
3831: if (scalar(@{$self->{STACK}}) == 0) {
3832: return $self->END_MAP();
1.51 bowersj2 3833: }
3834:
3835: # Have we not yet begun? If not, return BEGIN_MAP and
3836: # remember that we've started.
3837: if ( !$self->{STARTED} ) {
3838: $self->{STARTED} = 1;
3839: return $self->BEGIN_MAP;
3840: }
3841:
3842: # Get the next resource in the branch
1.100 bowersj2 3843: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3844:
1.100 bowersj2 3845: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3846: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3847:
3848: # Get the next possible resources
1.90 bowersj2 3849: my $nextUnfiltered;
1.89 bowersj2 3850: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3851: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3852: } else {
1.90 bowersj2 3853: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3854: }
1.51 bowersj2 3855: my $next = [];
3856:
3857: # filter the next possibilities to remove things we've
1.100 bowersj2 3858: # already seen.
1.394 raeburn 3859: foreach my $item (@$nextUnfiltered) {
3860: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
3861: push @$next, $item;
1.52 bowersj2 3862: }
1.51 bowersj2 3863: }
3864:
3865: while (@$next) {
1.100 bowersj2 3866: # copy the next possibilities over to the stack
3867: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3868: }
3869:
3870: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3871: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3872: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3873: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3874: my $firstResource = $self->{HERE}->map_start();
3875: my $finishResource = $self->{HERE}->map_finish();
3876:
3877: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3878: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3879: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3880: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3881: }
3882:
3883: return $self->{HERE};
1.190 bowersj2 3884: }
3885:
3886: # Identical to the full iterator methods of the same name. Hate to copy/paste
3887: # but I also hate to "inherit" either iterator from the other.
3888:
3889: sub getStack {
3890: my $self=shift;
3891:
3892: my @stack;
3893:
3894: $self->populateStack(\@stack);
3895:
3896: return \@stack;
3897: }
3898:
3899: # Private method: Calls the iterators recursively to populate the stack.
3900: sub populateStack {
3901: my $self=shift;
3902: my $stack = shift;
3903:
3904: push @$stack, $self->{HERE} if ($self->{HERE});
3905:
3906: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3907: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3908: }
1.51 bowersj2 3909: }
3910:
1.1 www 3911: 1;
1.2 www 3912:
1.51 bowersj2 3913: package Apache::lonnavmaps::resource;
1.365 albertel 3914: use Scalar::Util qw(weaken);
1.51 bowersj2 3915: use Apache::lonnet;
3916:
3917: =pod
3918:
1.217 bowersj2 3919: =head1 Object: resource
1.51 bowersj2 3920:
1.217 bowersj2 3921: X<resource, navmap object>
1.174 albertel 3922: A resource object encapsulates a resource in a resource map, allowing
3923: easy manipulation of the resource, querying the properties of the
3924: resource (including user properties), and represents a reference that
3925: can be used as the canonical representation of the resource by
3926: lonnavmap clients like renderers.
3927:
3928: A resource only makes sense in the context of a navmap, as some of the
3929: data is stored in the navmap object.
3930:
3931: You will probably never need to instantiate this object directly. Use
3932: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3933: starting resource.
1.51 bowersj2 3934:
1.188 bowersj2 3935: Resource objects respect the parameter_hiddenparts, which suppresses
3936: various parts according to the wishes of the map author. As of this
3937: writing, there is no way to override this parameter, and suppressed
3938: parts will never be returned, nor will their response types or ids be
3939: stored.
3940:
1.217 bowersj2 3941: =head2 Overview
1.51 bowersj2 3942:
1.217 bowersj2 3943: A B<Resource> is the most granular type of object in LON-CAPA that can
3944: be included in a course. It can either be a particular resource, like
3945: an HTML page, external resource, problem, etc., or it can be a
3946: container sequence, such as a "page" or a "map".
3947:
3948: To see a sequence from the user's point of view, please see the
3949: B<Creating a Course: Maps and Sequences> chapter of the Author's
3950: Manual.
3951:
3952: A Resource Object, once obtained from a navmap object via a B<getBy*>
3953: method of the navmap, or from an iterator, allows you to query
3954: information about that resource.
3955:
3956: Generally, you do not ever want to create a resource object yourself,
3957: so creation has been left undocumented. Always retrieve resources
3958: from navmap objects.
3959:
3960: =head3 Identifying Resources
3961:
3962: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3963: unique to that resource for a given course. X<resource ID, in big hash>
3964: The Resource ID has the form #.#, where the first number is the same
3965: for every resource in a map, and the second is unique. For instance,
3966: for a course laid out like this:
3967:
3968: * Problem 1
3969: * Map
3970: * Resource 2
3971: * Resource 3
3972:
3973: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3974: C<Resource 3> will share a first number. The second number may end up
3975: re-used between the two groups.
3976:
3977: The resource ID is only used in the big hash, but can be used in the
3978: context of a course to identify a resource easily. (For instance, the
3979: printing system uses it to record which resources from a sequence you
3980: wish to print.)
3981:
3982: X<symb> X<resource, symb>
3983: All resources also have B<symb>s, which uniquely identify a resource
3984: in a course. Many internal LON-CAPA functions expect a symb. A symb
3985: carries along with it the URL of the resource, and the map it appears
1.398 banghart 3986: in. Symbs are much larger than resource IDs.
1.51 bowersj2 3987:
3988: =cut
3989:
3990: sub new {
3991: # magic invocation to create a class instance
3992: my $proto = shift;
3993: my $class = ref($proto) || $proto;
3994: my $self = {};
3995:
1.300 albertel 3996: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3997: $self->{ID} = shift;
3998:
1.454 www 3999: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
4000: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
4001:
1.51 bowersj2 4002: # Store this new resource in the parent nav map's cache.
4003: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 4004: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 4005:
1.479 raeburn 4006: $self->{DUEDATE_CACHE} = undef;
4007:
1.51 bowersj2 4008: # A hash that can be used by two-pass algorithms to store data
4009: # about this resource in. Not used by the resource object
4010: # directly.
4011: $self->{DATA} = {};
1.508 damieng 4012:
1.51 bowersj2 4013: bless($self);
4014:
1.508 damieng 4015: # This is a speed optimization, to avoid calling symb() too often.
4016: $self->{SYMB} = $self->symb();
4017:
1.51 bowersj2 4018: return $self;
4019: }
4020:
1.70 bowersj2 4021: # private function: simplify the NAV_HASH lookups we keep doing
4022: # pass the name, and to automatically append my ID, pass a true val on the
4023: # second param
4024: sub navHash {
4025: my $self = shift;
4026: my $param = shift;
4027: my $id = shift;
1.441 raeburn 4028: my $arg = $param . ($id?$self->{ID}:"");
1.451 raeburn 4029: if (ref($self) && ref($self->{NAV_MAP}) && defined($arg)) {
1.441 raeburn 4030: return $self->{NAV_MAP}->navhash($arg);
4031: }
4032: return;
1.70 bowersj2 4033: }
4034:
1.51 bowersj2 4035: =pod
4036:
1.217 bowersj2 4037: =head2 Methods
1.70 bowersj2 4038:
1.217 bowersj2 4039: Once you have a resource object, here's what you can do with it:
4040:
4041: =head3 Attribute Retrieval
4042:
4043: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 4044:
4045: =over 4
4046:
1.217 bowersj2 4047: =item * B<ID>: Every resource has an ID that is unique for that
4048: resource in the course it is in. The ID is actually in the hash
4049: representing the resource, so for a resource object $res, obtain
4050: it via C<$res->{ID}).
4051:
1.174 albertel 4052: =item * B<compTitle>:
4053:
4054: Returns a "composite title", that is equal to $res->title() if the
4055: resource has a title, and is otherwise the last part of the URL (e.g.,
4056: "problem.problem").
4057:
4058: =item * B<ext>:
4059:
4060: Returns true if the resource is external.
4061:
4062: =item * B<kind>:
4063:
4064: Returns the kind of the resource from the compiled nav map.
4065:
4066: =item * B<randomout>:
1.106 bowersj2 4067:
1.174 albertel 4068: Returns true if this resource was chosen to NOT be shown to the user
4069: by the random map selection feature. In other words, this is usually
4070: false.
1.70 bowersj2 4071:
1.174 albertel 4072: =item * B<randompick>:
1.70 bowersj2 4073:
1.400 albertel 4074: Returns the number of randomly picked items for a map if the randompick
4075: feature is being used on the map.
4076:
4077: =item * B<randomorder>:
4078:
4079: Returns true for a map if the randomorder feature is being used on the
4080: map.
1.70 bowersj2 4081:
1.174 albertel 4082: =item * B<src>:
1.51 bowersj2 4083:
1.174 albertel 4084: Returns the source for the resource.
1.70 bowersj2 4085:
1.174 albertel 4086: =item * B<symb>:
1.70 bowersj2 4087:
1.174 albertel 4088: Returns the symb for the resource.
1.70 bowersj2 4089:
1.174 albertel 4090: =item * B<title>:
1.70 bowersj2 4091:
1.174 albertel 4092: Returns the title of the resource.
4093:
1.51 bowersj2 4094: =back
4095:
4096: =cut
4097:
4098: # These info functions can be used directly, as they don't return
4099: # resource information.
1.85 bowersj2 4100: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.303 albertel 4101: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
1.70 bowersj2 4102: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 4103: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 4104: # considered private and undocumented
1.51 bowersj2 4105: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
4106: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 4107: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
4108: sub randompick {
4109: my $self = shift;
1.410 raeburn 4110: my $randompick = $self->parmval('randompick');
4111: return $randompick;
1.68 bowersj2 4112: }
1.400 albertel 4113: sub randomorder {
4114: my $self = shift;
1.410 raeburn 4115: my $randomorder = $self->parmval('randomorder');
4116: return ($randomorder =~ /^yes$/i);
1.400 albertel 4117: }
1.303 albertel 4118: sub link {
4119: my $self=shift;
4120: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
4121: return $self->src;
4122: }
1.51 bowersj2 4123: sub src {
4124: my $self=shift;
4125: return $self->navHash("src_", 1);
4126: }
1.303 albertel 4127: sub shown_symb {
4128: my $self=shift;
1.508 damieng 4129: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->{SYMB});}
4130: return $self->{SYMB};
1.303 albertel 4131: }
1.328 www 4132: sub id {
4133: my $self=shift;
4134: return $self->{ID};
4135: }
4136: sub enclosing_map_src {
4137: my $self=shift;
4138: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4139: return $self->navHash('map_id_'.$first);
4140: }
1.51 bowersj2 4141: sub symb {
4142: my $self=shift;
1.509.2.4 raeburn 4143: if (defined($self->{SYMB})) { return $self->{SYMB}; }
1.51 bowersj2 4144: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4145: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 4146: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 4147: . '___' . $second . '___' . $symbSrc;
1.223 albertel 4148: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 4149: }
1.321 raeburn 4150: sub wrap_symb {
4151: my $self = shift;
1.508 damieng 4152: return $self->{NAV_MAP}->wrap_symb($self->{SYMB});
1.321 raeburn 4153: }
1.213 bowersj2 4154: sub title {
4155: my $self=shift;
4156: if ($self->{ID} eq '0.0') {
4157: # If this is the top-level map, return the title of the course
4158: # since this map can not be titled otherwise.
1.320 albertel 4159: return $env{'course.'.$env{'request.course.id'}.'.description'};
1.213 bowersj2 4160: }
4161: return $self->navHash("title_", 1); }
1.217 bowersj2 4162: # considered private and undocumented
1.70 bowersj2 4163: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.301 albertel 4164: sub condition {
4165: my $self=shift;
4166: my $undercond=$self->navHash("undercond_", 1);
4167: if (!defined($undercond)) { return 1; };
4168: my $condid=$self->navHash("condid_$undercond");
4169: if (!defined($condid)) { return 1; };
4170: my $condition=&Apache::lonnet::directcondval($condid);
4171: return $condition;
4172: }
1.342 albertel 4173: sub condval {
4174: my $self=shift;
1.359 albertel 4175: my ($pathname,$filename) =
4176: &Apache::lonnet::split_uri_for_cond($self->src());
1.342 albertel 4177:
4178: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4179: /\&\Q$filename\E\:([\d\|]+)\&/);
4180: if ($match) {
4181: return &Apache::lonnet::condval($1);
4182: }
4183: return 0;
4184: }
1.106 bowersj2 4185: sub compTitle {
4186: my $self = shift;
4187: my $title = $self->title();
1.176 www 4188: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 4189: if (!$title) {
4190: $title = $self->src();
4191: $title = substr($title, rindex($title, '/') + 1);
4192: }
4193: return $title;
4194: }
1.399 albertel 4195:
1.70 bowersj2 4196: =pod
4197:
4198: B<Predicate Testing the Resource>
4199:
4200: These methods are shortcuts to deciding if a given resource has a given property.
4201:
4202: =over 4
4203:
1.174 albertel 4204: =item * B<is_map>:
4205:
4206: Returns true if the resource is a map type.
4207:
4208: =item * B<is_problem>:
1.70 bowersj2 4209:
1.174 albertel 4210: Returns true if the resource is a problem type, false
4211: otherwise. (Looks at the extension on the src field; might need more
4212: to work correctly.)
1.70 bowersj2 4213:
1.174 albertel 4214: =item * B<is_page>:
1.70 bowersj2 4215:
1.174 albertel 4216: Returns true if the resource is a page.
4217:
4218: =item * B<is_sequence>:
4219:
4220: Returns true if the resource is a sequence.
1.70 bowersj2 4221:
4222: =back
4223:
4224: =cut
4225:
1.256 albertel 4226: sub hasResource {
4227: my $self = shift;
4228: return $self->{NAV_MAP}->hasResource(@_);
4229: }
4230:
4231: sub retrieveResources {
4232: my $self = shift;
4233: return $self->{NAV_MAP}->retrieveResources(@_);
4234: }
1.70 bowersj2 4235:
1.369 albertel 4236: sub is_exam {
4237: my ($self,$part) = @_;
1.410 raeburn 4238: my $type = $self->parmval('type',$part);
4239: if ($type eq 'exam') {
1.369 albertel 4240: return 1;
4241: }
4242: if ($self->src() =~ /\.(exam)$/) {
4243: return 1;
4244: }
4245: return 0;
4246: }
1.70 bowersj2 4247: sub is_html {
1.51 bowersj2 4248: my $self=shift;
4249: my $src = $self->src();
1.70 bowersj2 4250: return ($src =~ /html$/);
1.51 bowersj2 4251: }
1.70 bowersj2 4252: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
4253: sub is_page {
1.51 bowersj2 4254: my $self=shift;
4255: my $src = $self->src();
1.205 bowersj2 4256: return $self->navHash("is_map_", 1) &&
4257: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 4258: }
1.361 albertel 4259: sub is_practice {
4260: my $self=shift;
4261: my ($part) = @_;
1.410 raeburn 4262: my $type = $self->parmval('type',$part);
4263: if ($type eq 'practice') {
1.361 albertel 4264: return 1;
4265: }
4266: return 0;
4267: }
1.70 bowersj2 4268: sub is_problem {
1.51 bowersj2 4269: my $self=shift;
4270: my $src = $self->src();
1.466 www 4271: if ($src =~ /$LONCAPA::assess_re/) {
1.361 albertel 4272: return !($self->is_practice());
4273: }
4274: return 0;
1.256 albertel 4275: }
1.443 foxr 4276: #
4277: # The has below is the set of status that are considered 'incomplete'
4278: #
4279: my %incomplete_hash =
4280: (
4281: TRIES_LEFT() => 1,
4282: OPEN() => 1,
4283: ATTEMPTED() => 1
4284:
4285: );
4286: #
4287: # Return tru if a problem is incomplete... for now incomplete means that
4288: # any part of the problem is incomplete.
4289: # Note that if the resources is not a problem, 0 is returned.
4290: #
4291: sub is_incomplete {
4292: my $self = shift;
4293: if ($self->is_problem()) {
4294: foreach my $part (@{$self->parts()}) {
4295: if (exists($incomplete_hash{$self->status($part)})) {
4296: return 1;
4297: }
4298: }
4299: }
4300: return 0;
4301:
4302: }
1.413 www 4303: sub is_raw_problem {
4304: my $self=shift;
4305: my $src = $self->src();
1.466 www 4306: if ($src =~ /$LONCAPA::assess_re/) {
1.413 www 4307: return 1;
4308: }
4309: return 0;
4310: }
4311:
1.256 albertel 4312: sub contains_problem {
4313: my $self=shift;
4314: if ($self->is_page()) {
4315: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
4316: return $hasProblem;
4317: }
4318: return 0;
1.51 bowersj2 4319: }
1.401 albertel 4320: sub map_contains_problem {
4321: my $self=shift;
4322: if ($self->is_map()) {
4323: my $has_problem=
4324: $self->hasResource($self,sub { $_[0]->is_problem() },1);
4325: return $has_problem;
4326: }
4327: return 0;
4328: }
1.70 bowersj2 4329: sub is_sequence {
1.51 bowersj2 4330: my $self=shift;
1.205 bowersj2 4331: return $self->navHash("is_map_", 1) &&
1.426 droeschl 4332: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 4333: }
1.261 matthew 4334: sub is_survey {
4335: my $self = shift();
4336: my $part = shift();
1.410 raeburn 4337: my $type = $self->parmval('type',$part);
1.444 raeburn 4338: if (($type eq 'survey') || ($type eq 'surveycred')) {
1.261 matthew 4339: return 1;
4340: }
1.263 albertel 4341: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 4342: return 1;
4343: }
4344: return 0;
4345: }
1.444 raeburn 4346: sub is_anonsurvey {
4347: my $self = shift();
4348: my $part = shift();
4349: my $type = $self->parmval('type',$part);
4350: if (($type eq 'anonsurvey') || ($type eq 'anonsurveycred')) {
4351: return 1;
4352: }
4353: return 0;
4354: }
1.360 albertel 4355: sub is_task {
4356: my $self=shift;
4357: my $src = $self->src();
4358: return ($src =~ /\.(task)$/)
4359: }
1.51 bowersj2 4360:
1.266 raeburn 4361: sub is_empty_sequence {
4362: my $self=shift;
4363: my $src = $self->src();
4364: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
4365: }
4366:
1.101 bowersj2 4367: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 4368: sub parmval {
4369: my $self = shift;
4370: my $what = shift;
1.185 bowersj2 4371: my $part = shift;
4372: if (!defined($part)) {
4373: $part = '0';
4374: }
1.508 damieng 4375: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->{SYMB});
1.51 bowersj2 4376: }
4377:
1.70 bowersj2 4378: =pod
4379:
4380: B<Map Methods>
4381:
1.174 albertel 4382: These methods are useful for getting information about the map
4383: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 4384:
4385: =over 4
4386:
1.174 albertel 4387: =item * B<map_finish>:
4388:
4389: Returns a reference to a resource object corresponding to the finish
4390: resource of the map.
1.70 bowersj2 4391:
1.174 albertel 4392: =item * B<map_pc>:
1.70 bowersj2 4393:
1.174 albertel 4394: Returns the pc value of the map, which is the first number that
4395: appears in the resource ID of the resources in the map, and is the
4396: number that appears around the middle of the symbs of the resources in
4397: that map.
1.70 bowersj2 4398:
1.174 albertel 4399: =item * B<map_start>:
4400:
4401: Returns a reference to a resource object corresponding to the start
4402: resource of the map.
4403:
4404: =item * B<map_type>:
4405:
4406: Returns a string with the type of the map in it.
1.70 bowersj2 4407:
1.497 raeburn 4408: =item * B<map_hierarchy>:
1.448 raeburn 4409:
4410: Returns a string with a comma-separated ordered list of map_pc IDs
4411: for the hierarchy of maps containing a map, with the top level
4412: map first, then descending to deeper levels, with the enclosing map last.
4413:
1.70 bowersj2 4414: =back
1.51 bowersj2 4415:
1.70 bowersj2 4416: =cut
1.51 bowersj2 4417:
4418: sub map_finish {
4419: my $self = shift;
4420: my $src = $self->src();
1.381 albertel 4421: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 4422: my $res = $self->navHash("map_finish_$src", 0);
4423: $res = $self->{NAV_MAP}->getById($res);
4424: return $res;
4425: }
1.70 bowersj2 4426: sub map_pc {
4427: my $self = shift;
1.381 albertel 4428: my $src = $self->src();
1.70 bowersj2 4429: return $self->navHash("map_pc_$src", 0);
4430: }
1.51 bowersj2 4431: sub map_start {
4432: my $self = shift;
4433: my $src = $self->src();
1.381 albertel 4434: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 4435: my $res = $self->navHash("map_start_$src", 0);
4436: $res = $self->{NAV_MAP}->getById($res);
4437: return $res;
4438: }
4439: sub map_type {
4440: my $self = shift;
4441: my $pc = $self->map_pc();
4442: return $self->navHash("map_type_$pc", 0);
4443: }
1.448 raeburn 4444: sub map_hierarchy {
4445: my $self = shift;
4446: my $pc = $self->map_pc();
4447: return $self->navHash("map_hierarchy_$pc", 0);
4448: }
1.51 bowersj2 4449:
4450: #####
4451: # Property queries
4452: #####
4453:
4454: # These functions will be responsible for returning the CORRECT
4455: # VALUE for the parameter, no matter what. So while they may look
1.398 banghart 4456: # like direct calls to parmval, they can be more than that.
1.51 bowersj2 4457: # So, for instance, the duedate function should use the "duedatetype"
1.398 banghart 4458: # information, rather than the resource object user.
1.51 bowersj2 4459:
4460: =pod
4461:
4462: =head2 Resource Parameters
4463:
1.174 albertel 4464: In order to use the resource parameters correctly, the nav map must
4465: have been instantiated with genCourseAndUserOptions set to true, so
4466: the courseopt and useropt is read correctly. Then, you can call these
4467: functions to get the relevant parameters for the resource. Each
4468: function defaults to part "0", but can be directed to another part by
4469: passing the part as the parameter.
4470:
4471: These methods are responsible for getting the parameter correct, not
4472: merely reflecting the contents of the GDBM hashes. As we move towards
4473: dates relative to other dates, these methods should be updated to
4474: reflect that. (Then, anybody using these methods will not have to update
4475: their code.)
4476:
4477: =over 4
4478:
1.485 foxr 4479:
1.459 foxr 4480: =item * B<printable>
4481:
4482: returns true if the current date is such that the
4483: specified resource part is printable.
4484:
1.485 foxr 4485:
1.459 foxr 4486: =item * B<resprintable>
4487:
4488: Returns true if all parts in the resource are printable making the
4489: entire resource printable.
4490:
4491: =item * B<acc>
1.174 albertel 4492:
4493: Get the Client IP/Name Access Control information.
1.51 bowersj2 4494:
1.174 albertel 4495: =item * B<answerdate>:
1.51 bowersj2 4496:
1.174 albertel 4497: Get the answer-reveal date for the problem.
4498:
1.211 bowersj2 4499: =item * B<awarded>:
4500:
4501: Gets the awarded value for the problem part. Requires genUserData set to
4502: true when the navmap object was created.
4503:
1.174 albertel 4504: =item * B<duedate>:
4505:
4506: Get the due date for the problem.
4507:
4508: =item * B<tries>:
4509:
4510: Get the number of tries the student has used on the problem.
4511:
4512: =item * B<maxtries>:
4513:
4514: Get the number of max tries allowed.
4515:
4516: =item * B<opendate>:
1.51 bowersj2 4517:
1.174 albertel 4518: Get the open date for the problem.
1.51 bowersj2 4519:
1.174 albertel 4520: =item * B<sig>:
1.51 bowersj2 4521:
1.174 albertel 4522: Get the significant figures setting.
1.51 bowersj2 4523:
1.174 albertel 4524: =item * B<tol>:
1.51 bowersj2 4525:
1.174 albertel 4526: Get the tolerance for the problem.
1.51 bowersj2 4527:
1.174 albertel 4528: =item * B<tries>:
1.51 bowersj2 4529:
1.174 albertel 4530: Get the number of tries the user has already used on the problem.
1.51 bowersj2 4531:
1.174 albertel 4532: =item * B<type>:
1.51 bowersj2 4533:
1.174 albertel 4534: Get the question type for the problem.
1.70 bowersj2 4535:
1.174 albertel 4536: =item * B<weight>:
1.51 bowersj2 4537:
1.174 albertel 4538: Get the weight for the problem.
1.51 bowersj2 4539:
4540: =back
4541:
4542: =cut
4543:
1.485 foxr 4544:
4545:
4546:
1.459 foxr 4547: sub printable {
4548:
4549: my ($self, $part) = @_;
4550:
4551: # The following cases apply:
1.487 foxr 4552: # - If a start date is not set, it is replaced by the open date.
4553: # - Ditto for start/open replaced by content open.
4554: # - If neither start nor printdates are set the part is printable.
1.459 foxr 4555: # - Start date set but no end date: Printable if now >= start date.
4556: # - End date set but no start date: Printable if now <= end date.
4557: # - both defined: printable if start <= now <= end
4558: #
1.487 foxr 4559:
4560: # Get the print open/close dates for the resource.
4561:
4562: my $start = $self->parmval("printstartdate", $part);
4563: my $end = $self->parmval("printenddate", $part);
4564:
4565: if (!$start) {
4566: $start = $self->parmval("opendate", $part);
4567: }
4568: if (!$start) {
4569: $start = $self->parmval("contentopen", $part);
4570: }
4571:
4572:
1.459 foxr 4573: my $now = time();
4574:
1.487 foxr 4575:
1.459 foxr 4576: my $startok = 1;
4577: my $endok = 1;
4578:
1.460 foxr 4579: if ((defined $start) && ($start ne '')) {
1.459 foxr 4580: $startok = $start <= $now;
4581: }
1.460 foxr 4582: if ((defined $end) && ($end != '')) {
1.459 foxr 4583: $endok = $end >= $now;
4584: }
4585: return $startok && $endok;
4586: }
4587:
4588: sub resprintable {
4589: my $self = shift;
4590:
4591: # get parts...or realize there are no parts.
4592:
1.460 foxr 4593: my $partsref = $self->parts();
4594: my @parts = @$partsref;
4595:
1.489 raeburn 4596: if (!@parts) {
1.459 foxr 4597: return $self->printable(0);
4598: } else {
1.460 foxr 4599: foreach my $part (@parts) {
4600: if (!$self->printable($part)) {
4601: return 0;
4602: }
1.459 foxr 4603: }
4604: return 1;
4605: }
4606: }
4607:
1.51 bowersj2 4608: sub acc {
4609: (my $self, my $part) = @_;
1.410 raeburn 4610: my $acc = $self->parmval("acc", $part);
4611: return $acc;
1.51 bowersj2 4612: }
4613: sub answerdate {
4614: (my $self, my $part) = @_;
4615: # Handle intervals
1.410 raeburn 4616: my $answerdatetype = $self->parmval("answerdate.type", $part);
4617: my $answerdate = $self->parmval("answerdate", $part);
4618: my $duedate = $self->parmval("duedate", $part);
4619: if ($answerdatetype eq 'date_interval') {
4620: $answerdate = $duedate + $answerdate;
1.51 bowersj2 4621: }
1.410 raeburn 4622: return $answerdate;
1.106 bowersj2 4623: }
1.211 bowersj2 4624: sub awarded {
4625: my $self = shift; my $part = shift;
1.221 bowersj2 4626: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 4627: if (!defined($part)) { $part = '0'; }
1.508 damieng 4628: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.awarded'};
1.211 bowersj2 4629: }
1.432 raeburn 4630: sub taskversion {
4631: my $self = shift; my $part = shift;
4632: $self->{NAV_MAP}->get_user_data();
4633: if (!defined($part)) { $part = '0'; }
1.508 damieng 4634: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.version'};
1.432 raeburn 4635: }
4636: sub taskstatus {
4637: my $self = shift; my $part = shift;
4638: $self->{NAV_MAP}->get_user_data();
4639: if (!defined($part)) { $part = '0'; }
1.508 damieng 4640: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
1.432 raeburn 4641: }
4642: sub solved {
4643: my $self = shift; my $part = shift;
4644: $self->{NAV_MAP}->get_user_data();
4645: if (!defined($part)) { $part = '0'; }
1.508 damieng 4646: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.solved'};
1.432 raeburn 4647: }
4648: sub checkedin {
4649: my $self = shift; my $part = shift;
4650: $self->{NAV_MAP}->get_user_data();
4651: if (!defined($part)) { $part = '0'; }
4652: if ($self->is_task()) {
4653: my $version = $self->taskversion($part);
1.508 damieng 4654: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
1.432 raeburn 4655: } else {
1.508 damieng 4656: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin.slot'});
1.432 raeburn 4657: }
4658: }
1.382 albertel 4659: # this should work exactly like the copy in lonhomework.pm
1.459 foxr 4660: # Why is there a copy in lonhomework? Why not centralized?
4661: #
4662: # TODO: Centralize duedate.
4663: #
4664:
1.51 bowersj2 4665: sub duedate {
4666: (my $self, my $part) = @_;
1.479 raeburn 4667: if (defined ($self->{DUEDATE_CACHE}->{$part})) {
4668: return $self->{DUEDATE_CACHE}->{$part};
4669: }
1.382 albertel 4670: my $date;
1.406 albertel 4671: my @interval=$self->parmval("interval", $part);
1.382 albertel 4672: my $due_date=$self->parmval("duedate", $part);
1.406 albertel 4673: if ($interval[0] =~ /\d+/) {
4674: my $first_access=&Apache::lonnet::get_first_access($interval[1],
1.509.2.1 raeburn 4675: $self->{SYMB});
1.382 albertel 4676: if (defined($first_access)) {
1.406 albertel 4677: my $interval = $first_access+$interval[0];
1.404 albertel 4678: $date = (!$due_date || $interval < $due_date) ? $interval
4679: : $due_date;
1.382 albertel 4680: } else {
4681: $date = $due_date;
4682: }
4683: } else {
4684: $date = $due_date;
1.260 albertel 4685: }
1.479 raeburn 4686: $self->{DUEDATE_CACHE}->{$part} = $date;
1.382 albertel 4687: return $date;
1.51 bowersj2 4688: }
1.334 albertel 4689: sub handgrade {
4690: (my $self, my $part) = @_;
1.399 albertel 4691: my @response_ids = $self->responseIds($part);
4692: if (@response_ids) {
4693: foreach my $response_id (@response_ids) {
1.410 raeburn 4694: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
4695: if (lc($handgrade) eq 'yes') {
1.399 albertel 4696: return 'yes';
4697: }
4698: }
4699: }
1.410 raeburn 4700: my $handgrade = $self->parmval("handgrade", $part);
4701: return $handgrade;
1.334 albertel 4702: }
1.51 bowersj2 4703: sub maxtries {
4704: (my $self, my $part) = @_;
1.410 raeburn 4705: my $maxtries = $self->parmval("maxtries", $part);
4706: return $maxtries;
1.51 bowersj2 4707: }
4708: sub opendate {
4709: (my $self, my $part) = @_;
1.410 raeburn 4710: my $opendatetype = $self->parmval("opendate.type", $part);
4711: my $opendate = $self->parmval("opendate", $part);
4712: if ($opendatetype eq 'date_interval') {
4713: my $duedate = $self->duedate($part);
4714: $opendate = $duedate - $opendate;
1.51 bowersj2 4715: }
1.410 raeburn 4716: return $opendate;
1.51 bowersj2 4717: }
1.185 bowersj2 4718: sub problemstatus {
4719: (my $self, my $part) = @_;
1.410 raeburn 4720: my $problemstatus = $self->parmval("problemstatus", $part);
4721: return lc($problemstatus);
1.185 bowersj2 4722: }
1.51 bowersj2 4723: sub sig {
4724: (my $self, my $part) = @_;
1.410 raeburn 4725: my $sig = $self->parmval("sig", $part);
4726: return $sig;
1.51 bowersj2 4727: }
4728: sub tol {
4729: (my $self, my $part) = @_;
1.410 raeburn 4730: my $tol = $self->parmval("tol", $part);
4731: return $tol;
1.51 bowersj2 4732: }
1.410 raeburn 4733: sub tries {
1.108 bowersj2 4734: my $self = shift;
4735: my $tries = $self->queryRestoreHash('tries', shift);
4736: if (!defined($tries)) { return '0';}
1.51 bowersj2 4737: return $tries;
4738: }
1.70 bowersj2 4739: sub type {
4740: (my $self, my $part) = @_;
1.410 raeburn 4741: my $type = $self->parmval("type", $part);
4742: return $type;
1.70 bowersj2 4743: }
1.109 bowersj2 4744: sub weight {
4745: my $self = shift; my $part = shift;
1.211 bowersj2 4746: if (!defined($part)) { $part = '0'; }
1.409 raeburn 4747: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.508 damieng 4748: $self->{SYMB}, $self->{DOMAIN},
1.453 www 4749: $self->{USERNAME},
1.409 raeburn 4750: $env{'request.course.sec'});
4751: return $weight;
1.274 matthew 4752: }
4753: sub part_display {
4754: my $self= shift(); my $partID = shift();
4755: if (! defined($partID)) { $partID = '0'; }
4756: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
1.509.2.1 raeburn 4757: $self->{SYMB});
1.274 matthew 4758: if (! defined($display) || $display eq '') {
4759: $display = $partID;
4760: }
4761: return $display;
1.70 bowersj2 4762: }
1.432 raeburn 4763: sub slot_control {
4764: my $self=shift(); my $part = shift();
4765: if (!defined($part)) { $part = '0'; }
4766: my $useslots = $self->parmval("useslots", $part);
4767: my $availablestudent = $self->parmval("availablestudent", $part);
4768: my $available = $self->parmval("available", $part);
4769: return ($useslots,$availablestudent,$available);
4770: }
1.51 bowersj2 4771:
4772: # Multiple things need this
4773: sub getReturnHash {
4774: my $self = shift;
4775:
4776: if (!defined($self->{RETURN_HASH})) {
1.508 damieng 4777: my %tmpHash = &Apache::lonnet::restore($self->{SYMB},undef,$self->{DOMAIN},$self->{USERNAME});
1.51 bowersj2 4778: $self->{RETURN_HASH} = \%tmpHash;
4779: }
4780: }
4781:
4782: ######
4783: # Status queries
4784: ######
4785:
4786: # These methods query the status of problems.
4787:
4788: # If we need to count parts, this function determines the number of
4789: # parts from the metadata. When called, it returns a reference to a list
4790: # of strings corresponding to the parts. (Thus, using it in a scalar context
4791: # tells you how many parts you have in the problem:
4792: # $partcount = scalar($resource->countParts());
4793: # Don't use $self->{PARTS} directly because you don't know if it's been
4794: # computed yet.
4795:
4796: =pod
4797:
4798: =head2 Resource misc
4799:
4800: Misc. functions for the resource.
4801:
4802: =over 4
4803:
1.174 albertel 4804: =item * B<hasDiscussion>:
1.59 bowersj2 4805:
1.174 albertel 4806: Returns a false value if there has been discussion since the user last
4807: logged in, true if there has. Always returns false if the discussion
4808: data was not extracted when the nav map was constructed.
4809:
1.366 albertel 4810: =item * B<last_post_time>:
4811:
4812: Returns a false value if there hasn't been discussion otherwise returns
4813: unix timestamp of last time a discussion posting (or edit) was made.
4814:
1.393 raeburn 4815: =item * B<discussion_info>:
1.366 albertel 4816:
1.393 raeburn 4817: optional argument is a filter (currently can be 'unread');
4818: returns in scalar context the count of the number of discussion postings.
1.366 albertel 4819:
4820: returns in list context both the count of postings and a hash ref
1.393 raeburn 4821: containing information about the postings (subject, id, timestamp) in a hash.
4822:
4823: 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 4824:
1.174 albertel 4825: =item * B<getFeedback>:
4826:
4827: Gets the feedback for the resource and returns the raw feedback string
4828: for the resource, or the null string if there is no feedback or the
4829: email data was not extracted when the nav map was constructed. Usually
4830: used like this:
1.59 bowersj2 4831:
1.394 raeburn 4832: for my $url (split(/\,/, $res->getFeedback())) {
4833: my $link = &escape($url);
1.59 bowersj2 4834: ...
4835:
4836: and use the link as appropriate.
4837:
4838: =cut
4839:
4840: sub hasDiscussion {
4841: my $self = shift;
1.508 damieng 4842: return $self->{NAV_MAP}->hasDiscussion($self->{SYMB});
1.59 bowersj2 4843: }
4844:
1.366 albertel 4845: sub last_post_time {
4846: my $self = shift;
1.508 damieng 4847: return $self->{NAV_MAP}->last_post_time($self->{SYMB});
1.366 albertel 4848: }
4849:
1.393 raeburn 4850: sub discussion_info {
4851: my ($self,$filter) = @_;
1.508 damieng 4852: return $self->{NAV_MAP}->discussion_info($self->{SYMB},$filter);
1.366 albertel 4853: }
4854:
1.59 bowersj2 4855: sub getFeedback {
4856: my $self = shift;
1.124 bowersj2 4857: my $source = $self->src();
1.508 damieng 4858: my $symb = $self->{SYMB};
1.125 bowersj2 4859: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4860: return $self->{NAV_MAP}->getFeedback($symb,$source);
1.124 bowersj2 4861: }
4862:
4863: sub getErrors {
4864: my $self = shift;
4865: my $source = $self->src();
1.508 damieng 4866: my $symb = $self->{SYMB};
1.124 bowersj2 4867: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4868: return $self->{NAV_MAP}->getErrors($symb,$source);
1.59 bowersj2 4869: }
4870:
4871: =pod
4872:
1.174 albertel 4873: =item * B<parts>():
1.51 bowersj2 4874:
1.174 albertel 4875: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 4876: each part of the problem. Single part problems have only a part '0'.
4877: Multipart problems do not return their part '0', since they typically
4878: do not really matter.
1.174 albertel 4879:
4880: =item * B<countParts>():
4881:
4882: Returns the number of parts of the problem a student can answer. Thus,
4883: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 4884: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 4885:
1.290 matthew 4886: =item * B<countResponses>():
4887:
4888: Returns the total number of responses in the problem a student can answer.
4889:
4890: =item * B<responseTypes>():
4891:
4892: Returns a hash whose keys are the response types. The values are the number
4893: of times each response type is used. This is for the I<entire> problem, not
4894: just a single part.
4895:
1.192 bowersj2 4896: =item * B<multipart>():
4897:
1.193 bowersj2 4898: Returns true if the problem is multipart, false otherwise. Use this instead
4899: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 4900:
1.187 bowersj2 4901: =item * B<responseType>($part):
4902:
4903: Returns the response type of the part, without the word "response" on the
4904: end. Example return values: 'string', 'essay', 'numeric', etc.
4905:
1.193 bowersj2 4906: =item * B<responseIds>($part):
1.187 bowersj2 4907:
1.193 bowersj2 4908: Retreives the response IDs for the given part as an array reference containing
4909: strings naming the response IDs. This may be empty.
1.187 bowersj2 4910:
1.51 bowersj2 4911: =back
4912:
4913: =cut
4914:
4915: sub parts {
4916: my $self = shift;
4917:
1.192 bowersj2 4918: if ($self->ext) { return []; }
1.67 bowersj2 4919:
1.51 bowersj2 4920: $self->extractParts();
4921: return $self->{PARTS};
4922: }
4923:
4924: sub countParts {
4925: my $self = shift;
4926:
4927: my $parts = $self->parts();
1.191 bowersj2 4928:
4929: # If I left this here, then it's not necessary.
4930: #my $delta = 0;
4931: #for my $part (@$parts) {
4932: # if ($part eq '0') { $delta--; }
4933: #}
1.66 bowersj2 4934:
4935: if ($self->{RESOURCE_ERROR}) {
4936: return 0;
4937: }
4938:
1.191 bowersj2 4939: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 4940: }
4941:
1.290 matthew 4942: sub countResponses {
4943: my $self = shift;
4944: my $count;
1.293 matthew 4945: foreach my $part (@{$self->parts()}) {
4946: $count+= scalar($self->responseIds($part));
1.290 matthew 4947: }
4948: return $count;
4949: }
4950:
4951: sub responseTypes {
4952: my $self = shift;
1.291 albertel 4953: my %responses;
1.368 raeburn 4954: foreach my $part (@{$self->parts()}) {
1.290 matthew 4955: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 4956: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 4957: }
4958: }
1.291 albertel 4959: return %responses;
1.290 matthew 4960: }
4961:
1.192 bowersj2 4962: sub multipart {
4963: my $self = shift;
4964: return $self->countParts() > 1;
1.51 bowersj2 4965: }
4966:
1.225 bowersj2 4967: sub singlepart {
4968: my $self = shift;
4969: return $self->countParts() == 1;
4970: }
4971:
1.187 bowersj2 4972: sub responseType {
1.184 bowersj2 4973: my $self = shift;
4974: my $part = shift;
4975:
4976: $self->extractParts();
1.235 albertel 4977: if (defined($self->{RESPONSE_TYPES}->{$part})) {
4978: return @{$self->{RESPONSE_TYPES}->{$part}};
4979: } else {
4980: return undef;
4981: }
1.187 bowersj2 4982: }
4983:
1.193 bowersj2 4984: sub responseIds {
1.187 bowersj2 4985: my $self = shift;
4986: my $part = shift;
4987:
4988: $self->extractParts();
1.235 albertel 4989: if (defined($self->{RESPONSE_IDS}->{$part})) {
4990: return @{$self->{RESPONSE_IDS}->{$part}};
4991: } else {
4992: return undef;
4993: }
1.184 bowersj2 4994: }
4995:
4996: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 4997: # part types, and saves it.
1.51 bowersj2 4998: sub extractParts {
4999: my $self = shift;
5000:
1.153 bowersj2 5001: return if (defined($self->{PARTS}));
1.67 bowersj2 5002: return if ($self->ext);
1.51 bowersj2 5003:
5004: $self->{PARTS} = [];
5005:
1.181 bowersj2 5006: my %parts;
5007:
1.82 bowersj2 5008: # Retrieve part count, if this is a problem
5009: if ($self->is_problem()) {
1.240 albertel 5010: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 5011: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 5012:
1.239 bowersj2 5013: if ($partorder) {
5014: my @parts;
5015: for my $part (split (/,/,$partorder)) {
1.508 damieng 5016: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
1.239 bowersj2 5017: push @parts, $part;
1.241 albertel 5018: $parts{$part} = 1;
1.239 bowersj2 5019: }
5020: }
5021: $self->{PARTS} = \@parts;
5022: } else {
5023: if (!$metadata) {
5024: $self->{RESOURCE_ERROR} = 1;
5025: $self->{PARTS} = [];
5026: $self->{PART_TYPE} = {};
5027: return;
5028: }
1.394 raeburn 5029: foreach my $entry (split(/\,/,$metadata)) {
5030: if ($entry =~ /^(?:part|Task)_(.*)$/) {
1.239 bowersj2 5031: my $part = $1;
5032: # This floods the logs if it blows up
5033: if (defined($parts{$part})) {
1.508 damieng 5034: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->{SYMB});
1.241 albertel 5035: }
1.239 bowersj2 5036:
5037: # check to see if part is turned off.
5038:
1.508 damieng 5039: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
1.239 bowersj2 5040: $parts{$part} = 1;
5041: }
5042: }
5043: }
1.504 raeburn 5044: my @sortedParts = sort(keys(%parts));
1.239 bowersj2 5045: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 5046: }
1.82 bowersj2 5047:
1.187 bowersj2 5048:
1.284 matthew 5049: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 5050: my %responseIdHash;
5051: my %responseTypeHash;
5052:
1.189 bowersj2 5053:
5054: # Init the responseIdHash
1.394 raeburn 5055: foreach my $part (@{$self->{PARTS}}) {
5056: $responseIdHash{$part} = [];
1.189 bowersj2 5057: }
5058:
1.187 bowersj2 5059: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 5060: # response id are delimited by underscores, but both the part
1.187 bowersj2 5061: # name and response id can themselves have underscores in them.
5062: # So we have to use our knowlege of part names to figure out
5063: # where the part names begin and end, and even then, it is possible
5064: # to construct ambiguous situations.
1.504 raeburn 5065: foreach my $data (split(/,/, $metadata)) {
1.379 albertel 5066: if ($data =~ /^([a-zA-Z]+)response_(.*)/
5067: || $data =~ /^(Task)_(.*)/) {
1.187 bowersj2 5068: my $responseType = $1;
5069: my $partStuff = $2;
5070: my $partIdSoFar = '';
1.504 raeburn 5071: my @partChunks = split(/_/, $partStuff);
1.187 bowersj2 5072: my $i = 0;
5073: for ($i = 0; $i < scalar(@partChunks); $i++) {
5074: if ($partIdSoFar) { $partIdSoFar .= '_'; }
5075: $partIdSoFar .= $partChunks[$i];
5076: if ($parts{$partIdSoFar}) {
5077: my @otherChunks = @partChunks[$i+1..$#partChunks];
5078: my $responseId = join('_', @otherChunks);
1.379 albertel 5079: if ($self->is_task()) {
5080: push(@{$responseIdHash{$partIdSoFar}},
5081: $partIdSoFar);
5082: } else {
5083: push(@{$responseIdHash{$partIdSoFar}},
5084: $responseId);
5085: }
5086: push(@{$responseTypeHash{$partIdSoFar}},
5087: $responseType);
1.187 bowersj2 5088: }
5089: }
5090: }
5091: }
1.264 albertel 5092: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 5093: #
5094: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 5095: if ($resorder) {
5096: my @resorder=split(/,/,$resorder);
5097: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 5098: my $i=0;
5099: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 5100: my @neworder;
5101: foreach my $possibleid (@resorder) {
5102: if (exists($resids{$possibleid})) {
1.286 albertel 5103: push(@neworder,$resids{$possibleid});
1.264 albertel 5104: }
5105: }
1.286 albertel 5106: my @ids;
5107: my @type;
5108: foreach my $element (@neworder) {
5109: push (@ids,$responseIdHash{$part}->[$element]);
5110: push (@type,$responseTypeHash{$part}->[$element]);
5111: }
5112: $responseIdHash{$part}=\@ids;
5113: $responseTypeHash{$part}=\@type;
1.264 albertel 5114: }
5115: }
1.187 bowersj2 5116: $self->{RESPONSE_IDS} = \%responseIdHash;
5117: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 5118: }
5119:
1.51 bowersj2 5120: return;
5121: }
5122:
5123: =pod
5124:
5125: =head2 Resource Status
5126:
1.174 albertel 5127: Problem resources have status information, reflecting their various
5128: dates and completion statuses.
1.51 bowersj2 5129:
1.174 albertel 5130: There are two aspects to the status: the date-related information and
5131: the completion information.
1.51 bowersj2 5132:
1.174 albertel 5133: Idiomatic usage of these two methods would probably look something
5134: like
1.51 bowersj2 5135:
1.394 raeburn 5136: foreach my $part ($resource->parts()) {
5137: my $dateStatus = $resource->getDateStatus($part);
5138: my $completionStatus = $resource->getCompletionStatus($part);
1.51 bowersj2 5139:
1.70 bowersj2 5140: or
5141:
1.394 raeburn 5142: my $status = $resource->status($part);
1.70 bowersj2 5143:
1.51 bowersj2 5144: ... use it here ...
5145: }
5146:
1.174 albertel 5147: Which you use depends on exactly what you are looking for. The
5148: status() function has been optimized for the nav maps display and may
5149: not precisely match what you need elsewhere.
1.101 bowersj2 5150:
1.174 albertel 5151: The symbolic constants shown below can be accessed through the
5152: resource object: C<$res->OPEN>.
1.101 bowersj2 5153:
1.51 bowersj2 5154: =over 4
5155:
1.174 albertel 5156: =item * B<getDateStatus>($part):
5157:
5158: ($part defaults to 0). A convenience function that returns a symbolic
5159: constant telling you about the date status of the part. The possible
5160: return values are:
1.51 bowersj2 5161:
5162: =back
5163:
5164: B<Date Codes>
5165:
5166: =over 4
5167:
1.174 albertel 5168: =item * B<OPEN_LATER>:
5169:
5170: The problem will be opened later.
5171:
5172: =item * B<OPEN>:
5173:
5174: Open and not yet due.
5175:
1.51 bowersj2 5176:
1.174 albertel 5177: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 5178:
1.174 albertel 5179: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 5180:
1.174 albertel 5181: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 5182:
1.174 albertel 5183: The due date has passed and there is no answer opening date set.
1.51 bowersj2 5184:
1.174 albertel 5185: =item * B<ANSWER_OPEN>:
1.51 bowersj2 5186:
1.174 albertel 5187: The answer date is here.
5188:
5189: =item * B<NETWORK_FAILURE>:
5190:
5191: The information is unknown due to network failure.
1.51 bowersj2 5192:
5193: =back
5194:
5195: =cut
5196:
5197: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 5198: sub OPEN_LATER { return 0; }
5199: sub OPEN { return 1; }
5200: sub PAST_DUE_NO_ANSWER { return 2; }
5201: sub PAST_DUE_ANSWER_LATER { return 3; }
5202: sub ANSWER_OPEN { return 4; }
1.432 raeburn 5203: sub NOTHING_SET { return 5; }
1.54 bowersj2 5204: sub NETWORK_FAILURE { return 100; }
5205:
5206: # getDateStatus gets the date status for a given problem part.
5207: # Because answer date, due date, and open date are fully independent
5208: # (i.e., it is perfectly possible to *only* have an answer date),
5209: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
5210: # (past, future, none given). This function handles this with a decision
5211: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 5212:
5213: sub getDateStatus {
5214: my $self = shift;
5215: my $part = shift;
5216: $part = "0" if (!defined($part));
1.54 bowersj2 5217:
5218: # Always return network failure if there was one.
1.51 bowersj2 5219: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5220:
5221: my $now = time();
5222:
1.53 bowersj2 5223: my $open = $self->opendate($part);
5224: my $due = $self->duedate($part);
5225: my $answer = $self->answerdate($part);
5226:
5227: if (!$open && !$due && !$answer) {
5228: # no data on the problem at all
5229: # should this be the same as "open later"? think multipart.
5230: return $self->NOTHING_SET;
5231: }
1.59 bowersj2 5232: if (!$open || $now < $open) {return $self->OPEN_LATER}
5233: if (!$due || $now < $due) {return $self->OPEN}
5234: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
5235: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 5236: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 5237: }
5238:
5239: =pod
5240:
5241: B<>
5242:
5243: =over 4
5244:
1.174 albertel 5245: =item * B<getCompletionStatus>($part):
1.51 bowersj2 5246:
1.174 albertel 5247: ($part defaults to 0.) A convenience function that returns a symbolic
5248: constant telling you about the completion status of the part, with the
5249: following possible results:
5250:
5251: =back
1.51 bowersj2 5252:
5253: B<Completion Codes>
5254:
5255: =over 4
5256:
1.174 albertel 5257: =item * B<NOT_ATTEMPTED>:
5258:
5259: Has not been attempted at all.
5260:
5261: =item * B<INCORRECT>:
5262:
5263: Attempted, but wrong by student.
1.51 bowersj2 5264:
1.174 albertel 5265: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 5266:
1.174 albertel 5267: Attempted, but wrong by instructor override.
1.51 bowersj2 5268:
1.174 albertel 5269: =item * B<CORRECT>:
1.51 bowersj2 5270:
1.174 albertel 5271: Correct or correct by instructor.
1.51 bowersj2 5272:
1.174 albertel 5273: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 5274:
1.174 albertel 5275: Correct by instructor override.
1.51 bowersj2 5276:
1.174 albertel 5277: =item * B<EXCUSED>:
5278:
5279: Excused. Not yet implemented.
5280:
5281: =item * B<NETWORK_FAILURE>:
5282:
5283: Information not available due to network failure.
5284:
5285: =item * B<ATTEMPTED>:
5286:
5287: Attempted, and not yet graded.
1.69 bowersj2 5288:
1.450 raeburn 5289: =item * B<CREDIT_ATTEMPTED>:
5290:
5291: Attempted, and credit received for attempt (survey and anonymous survey only).
5292:
1.51 bowersj2 5293: =back
5294:
5295: =cut
5296:
1.53 bowersj2 5297: sub NOT_ATTEMPTED { return 10; }
5298: sub INCORRECT { return 11; }
5299: sub INCORRECT_BY_OVERRIDE { return 12; }
5300: sub CORRECT { return 13; }
5301: sub CORRECT_BY_OVERRIDE { return 14; }
5302: sub EXCUSED { return 15; }
1.69 bowersj2 5303: sub ATTEMPTED { return 16; }
1.450 raeburn 5304: sub CREDIT_ATTEMPTED { return 17; }
1.51 bowersj2 5305:
5306: sub getCompletionStatus {
5307: my $self = shift;
1.332 albertel 5308: my $part = shift;
1.51 bowersj2 5309: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5310:
1.332 albertel 5311: my $status = $self->queryRestoreHash('solved', $part);
1.51 bowersj2 5312:
1.251 www 5313: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 5314: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 5315: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.332 albertel 5316: if ($status eq 'correct_by_override') {
5317: return $self->CORRECT_BY_OVERRIDE;
5318: }
1.51 bowersj2 5319: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
5320: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
5321: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 5322: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.450 raeburn 5323: if ($status eq 'credit_attempted') {
5324: if ($self->is_anonsurvey($part) || $self->is_survey($part)) {
5325: return $self->CREDIT_ATTEMPTED;
5326: } else {
5327: return $self->ATTEMPTED;
5328: }
5329: }
1.51 bowersj2 5330: return $self->NOT_ATTEMPTED;
1.108 bowersj2 5331: }
5332:
5333: sub queryRestoreHash {
5334: my $self = shift;
5335: my $hashentry = shift;
5336: my $part = shift;
1.185 bowersj2 5337: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 5338: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5339:
5340: $self->getReturnHash();
5341:
5342: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 5343: }
5344:
5345: =pod
5346:
5347: B<Composite Status>
5348:
1.174 albertel 5349: Along with directly returning the date or completion status, the
5350: resource object includes a convenience function B<status>() that will
5351: combine the two status tidbits into one composite status that can
1.191 bowersj2 5352: represent the status of the resource as a whole. This method represents
5353: the concept of the thing we want to display to the user on the nav maps
5354: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 5355: documented in the comments of the status method. The following results
5356: may be returned, all available as methods on the resource object
1.185 bowersj2 5357: ($res->NETWORK_FAILURE): In addition to the return values that match
5358: the date or completion status, this function can return "ANSWER_SUBMITTED"
5359: if that problemstatus parameter value is set to No, suppressing the
5360: incorrect/correct feedback.
1.51 bowersj2 5361:
5362: =over 4
5363:
1.174 albertel 5364: =item * B<NETWORK_FAILURE>:
5365:
5366: The network has failed and the information is not available.
1.51 bowersj2 5367:
1.174 albertel 5368: =item * B<NOTHING_SET>:
1.53 bowersj2 5369:
1.174 albertel 5370: No dates have been set for this problem (part) at all. (Because only
5371: certain parts of a multi-part problem may be assigned, this can not be
5372: collapsed into "open later", as we do not know a given part will EVER
5373: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 5374:
1.174 albertel 5375: =item * B<CORRECT>:
1.51 bowersj2 5376:
1.174 albertel 5377: For any reason at all, the part is considered correct.
1.54 bowersj2 5378:
1.174 albertel 5379: =item * B<EXCUSED>:
1.51 bowersj2 5380:
1.174 albertel 5381: For any reason at all, the problem is excused.
1.51 bowersj2 5382:
1.174 albertel 5383: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 5384:
1.174 albertel 5385: The problem is past due, not considered correct, and no answer date is
5386: set.
1.51 bowersj2 5387:
1.174 albertel 5388: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 5389:
1.174 albertel 5390: The problem is past due, not considered correct, and an answer date in
5391: the future is set.
1.51 bowersj2 5392:
1.174 albertel 5393: =item * B<ANSWER_OPEN>:
5394:
5395: The problem is past due, not correct, and the answer is now available.
5396:
5397: =item * B<OPEN_LATER>:
5398:
5399: The problem is not yet open.
5400:
5401: =item * B<TRIES_LEFT>:
5402:
5403: The problem is open, has been tried, is not correct, but there are
5404: tries left.
5405:
5406: =item * B<INCORRECT>:
5407:
5408: The problem is open, and all tries have been used without getting the
5409: correct answer.
5410:
5411: =item * B<OPEN>:
5412:
5413: The item is open and not yet tried.
5414:
5415: =item * B<ATTEMPTED>:
5416:
5417: The problem has been attempted.
1.69 bowersj2 5418:
1.450 raeburn 5419: =item * B<CREDIT_ATTEMPTED>:
5420:
5421: The problem has been attempted, and credit given for the attempt (survey and anonymous survey only).
5422:
1.185 bowersj2 5423: =item * B<ANSWER_SUBMITTED>:
5424:
5425: An answer has been submitted, but the student should not see it.
5426:
1.51 bowersj2 5427: =back
5428:
5429: =cut
5430:
1.432 raeburn 5431: sub TRIES_LEFT { return 20; }
5432: sub ANSWER_SUBMITTED { return 21; }
5433: sub PARTIALLY_CORRECT { return 22; }
5434:
5435: sub RESERVED_LATER { return 30; }
5436: sub RESERVED { return 31; }
5437: sub RESERVED_LOCATION { return 32; }
5438: sub RESERVABLE { return 33; }
5439: sub RESERVABLE_LATER { return 34; }
5440: sub NOTRESERVABLE { return 35; }
5441: sub NOT_IN_A_SLOT { return 36; }
5442: sub NEEDS_CHECKIN { return 37; }
5443: sub WAITING_FOR_GRADE { return 38; }
5444: sub UNKNOWN { return 39; }
1.51 bowersj2 5445:
5446: sub status {
5447: my $self = shift;
5448: my $part = shift;
5449: if (!defined($part)) { $part = "0"; }
5450: my $completionStatus = $self->getCompletionStatus($part);
5451: my $dateStatus = $self->getDateStatus($part);
5452:
5453: # What we have is a two-dimensional matrix with 4 entries on one
5454: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 5455: # plus network failure and "no date data at all".
1.51 bowersj2 5456:
1.222 bowersj2 5457: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 5458: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 5459:
1.408 raeburn 5460: my $suppressFeedback = 0;
5461: if (($self->problemstatus($part) eq 'no') ||
5462: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5463: $suppressFeedback = 1;
5464: }
1.236 bowersj2 5465: # If there's an answer date and we're past it, don't
5466: # suppress the feedback; student should know
1.330 albertel 5467: if ($self->duedate($part) && $self->duedate($part) < time() &&
5468: $self->answerdate($part) && $self->answerdate($part) < time()) {
1.236 bowersj2 5469: $suppressFeedback = 0;
5470: }
1.185 bowersj2 5471:
1.51 bowersj2 5472: # There are a few whole rows we can dispose of:
1.53 bowersj2 5473: if ($completionStatus == CORRECT ||
5474: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.332 albertel 5475: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
5476: my $awarded=$self->awarded($part);
5477: if ($awarded < 1 && $awarded > 0) {
5478: return PARTIALLY_CORRECT;
5479: } elsif ($awarded<1) {
5480: return INCORRECT;
5481: }
5482: return CORRECT;
1.69 bowersj2 5483: }
5484:
1.343 albertel 5485: # If it's WRONG... and not open
5486: if ( ($completionStatus == INCORRECT ||
5487: $completionStatus == INCORRECT_BY_OVERRIDE)
5488: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
5489: return INCORRECT;
5490: }
5491:
1.69 bowersj2 5492: if ($completionStatus == ATTEMPTED) {
5493: return ATTEMPTED;
1.53 bowersj2 5494: }
5495:
1.450 raeburn 5496: if ($completionStatus == CREDIT_ATTEMPTED) {
5497: return CREDIT_ATTEMPTED;
5498: }
5499:
1.53 bowersj2 5500: # If it's EXCUSED, then return that no matter what
5501: if ($completionStatus == EXCUSED) {
5502: return EXCUSED;
1.51 bowersj2 5503: }
5504:
1.53 bowersj2 5505: if ($dateStatus == NOTHING_SET) {
5506: return NOTHING_SET;
1.51 bowersj2 5507: }
5508:
1.69 bowersj2 5509: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
5510: # by 4 matrix (date statuses).
1.51 bowersj2 5511:
1.54 bowersj2 5512: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 5513: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 5514: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 5515: }
5516:
1.53 bowersj2 5517: if ($dateStatus == ANSWER_OPEN) {
5518: return ANSWER_OPEN;
1.51 bowersj2 5519: }
5520:
5521: # Now: (incorrect, incorrect_override, not_attempted) x
5522: # (open_later), (open)
5523:
1.53 bowersj2 5524: if ($dateStatus == OPEN_LATER) {
5525: return OPEN_LATER;
1.51 bowersj2 5526: }
5527:
5528: # If it's WRONG...
1.53 bowersj2 5529: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 5530: # and there are TRIES LEFT:
1.79 bowersj2 5531: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 5532: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 5533: }
1.185 bowersj2 5534: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 5535: }
5536:
5537: # Otherwise, it's untried and open
1.473 raeburn 5538: return OPEN;
1.224 bowersj2 5539: }
5540:
1.432 raeburn 5541: sub check_for_slot {
5542: my $self = shift;
5543: my $part = shift;
1.508 damieng 5544: my $symb = $self->{SYMB};
1.432 raeburn 5545: my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
5546: if (($use_slots ne '') && ($use_slots !~ /^\s*no\s*$/i)) {
5547: my @slots = (split(/:/,$availablestudent),split(/:/,$available));
5548: my $cid=$env{'request.course.id'};
5549: my $cdom=$env{'course.'.$cid.'.domain'};
5550: my $cnum=$env{'course.'.$cid.'.num'};
5551: my $now = time;
1.473 raeburn 5552: my $num_usable_slots = 0;
1.509.2.2 raeburn 5553: my ($checkedin,$checkedinslot,%consumed_uniq,%slots);
1.432 raeburn 5554: if (@slots > 0) {
1.509.2.2 raeburn 5555: %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
1.432 raeburn 5556: if (&Apache::lonnet::error(%slots)) {
5557: return (UNKNOWN);
5558: }
1.473 raeburn 5559: my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
1.432 raeburn 5560: foreach my $slot_name (@sorted_slots) {
1.473 raeburn 5561: next if (!defined($slots{$slot_name}) || !ref($slots{$slot_name}));
1.432 raeburn 5562: my $end = $slots{$slot_name}->{'endtime'};
5563: my $start = $slots{$slot_name}->{'starttime'};
5564: my $ip = $slots{$slot_name}->{'ip'};
5565: if ($self->simpleStatus() == OPEN) {
5566: if ($end > $now) {
1.473 raeburn 5567: if ($start > $now) {
5568: return (RESERVED_LATER,$start,$slot_name);
5569: } else {
5570: if ($ip ne '') {
5571: if (!&Apache::loncommon::check_ip_acc($ip)) {
1.503 raeburn 5572: return (RESERVED_LOCATION,$end,$slot_name);
1.432 raeburn 5573: }
5574: }
1.473 raeburn 5575: my @proctors;
5576: if ($slots{$slot_name}->{'proctor'} ne '') {
5577: @proctors = split(',',$slots{$slot_name}->{'proctor'});
5578: }
5579: if (@proctors > 0) {
5580: ($checkedin,$checkedinslot) = $self->checkedin();
5581: unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
5582: ($checkedinslot eq $slot_name)) {
1.509.2.6 raeburn 5583: return (NEEDS_CHECKIN,$end,$slot_name);
1.472 raeburn 5584: }
1.432 raeburn 5585: }
1.473 raeburn 5586: return (RESERVED,$end,$slot_name);
1.432 raeburn 5587: }
5588: }
1.473 raeburn 5589: } elsif ($end > $now) {
5590: $num_usable_slots ++;
1.432 raeburn 5591: }
5592: }
1.509.2.2 raeburn 5593: my ($is_correct,$wait_for_grade);
1.432 raeburn 5594: if ($self->is_task()) {
5595: my $taskstatus = $self->taskstatus();
5596: $is_correct = (($taskstatus eq 'pass') ||
5597: ($self->solved() =~ /^correct_/));
1.509.2.2 raeburn 5598: unless ($taskstatus =~ /^(?:pass|fail)$/) {
5599: $wait_for_grade = 1;
5600: }
1.432 raeburn 5601: } else {
1.509.2.2 raeburn 5602: unless ($self->completable()) {
5603: $wait_for_grade = 1;
5604: }
5605: unless (($self->problemstatus($part) eq 'no') ||
5606: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5607: $is_correct = ($self->solved($part) =~ /^correct_/);
5608: $wait_for_grade = 0;
5609: }
1.432 raeburn 5610: }
5611: ($checkedin,$checkedinslot) = $self->checkedin();
5612: if ($checkedin) {
1.509.2.2 raeburn 5613: if (ref($slots{$checkedinslot}) eq 'HASH') {
5614: $consumed_uniq{$checkedinslot} = $slots{$checkedinslot}{'uniqueperiod'};
5615: }
5616: if ($wait_for_grade) {
1.432 raeburn 5617: return (WAITING_FOR_GRADE);
5618: } elsif ($is_correct) {
5619: return (CORRECT);
5620: }
5621: }
1.473 raeburn 5622: if ($num_usable_slots) {
5623: return(NOT_IN_A_SLOT);
5624: }
5625: }
5626: my $reservable = &Apache::lonnet::get_reservable_slots($cnum,$cdom,$env{'user.name'},
5627: $env{'user.domain'});
5628: if (ref($reservable) eq 'HASH') {
5629: if ((ref($reservable->{'now_order'}) eq 'ARRAY') && (ref($reservable->{'now'}) eq 'HASH')) {
1.474 raeburn 5630: foreach my $slot (reverse (@{$reservable->{'now_order'}})) {
1.509.2.2 raeburn 5631: my $canuse;
1.473 raeburn 5632: if (($reservable->{'now'}{$slot}{'symb'} eq '') ||
5633: ($reservable->{'now'}{$slot}{'symb'} eq $symb)) {
1.509.2.2 raeburn 5634: $canuse = 1;
5635: }
5636: if ($canuse) {
5637: if ($checkedin) {
5638: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5639: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5640: if ($reservable->{'now'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5641: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5642: next if (!
5643: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5644: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5645: }
5646: }
5647: }
1.473 raeburn 5648: return(RESERVABLE,$reservable->{'now'}{$slot}{'endreserve'});
5649: }
5650: }
1.432 raeburn 5651: }
1.473 raeburn 5652: if ((ref($reservable->{'future_order'}) eq 'ARRAY') && (ref($reservable->{'future'}) eq 'HASH')) {
1.474 raeburn 5653: foreach my $slot (@{$reservable->{'future_order'}}) {
1.509.2.2 raeburn 5654: my $canuse;
1.473 raeburn 5655: if (($reservable->{'future'}{$slot}{'symb'} eq '') ||
5656: ($reservable->{'future'}{$slot}{'symb'} eq $symb)) {
1.509.2.2 raeburn 5657: $canuse = 1;
5658: }
5659: if ($canuse) {
5660: if ($checkedin) {
5661: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5662: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5663: if ($reservable->{'future'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5664: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5665: next if (!
5666: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5667: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5668: }
5669: }
5670: }
1.473 raeburn 5671: return(RESERVABLE_LATER,$reservable->{'future'}{$slot}{'startreserve'});
5672: }
5673: }
1.432 raeburn 5674: }
5675: }
1.473 raeburn 5676: return(NOTRESERVABLE);
1.432 raeburn 5677: }
5678: return;
5679: }
5680:
1.224 bowersj2 5681: sub CLOSED { return 23; }
5682: sub ERROR { return 24; }
5683:
5684: =pod
5685:
5686: B<Simple Status>
5687:
5688: Convenience method B<simpleStatus> provides a "simple status" for the resource.
5689: "Simple status" corresponds to "which icon is shown on the
5690: Navmaps". There are six "simple" statuses:
5691:
5692: =over 4
5693:
5694: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
5695:
5696: =item * B<OPEN>: The problem is open and unattempted.
5697:
5698: =item * B<CORRECT>: The problem is correct for any reason.
5699:
5700: =item * B<INCORRECT>: The problem is incorrect and can still be
5701: completed successfully.
5702:
5703: =item * B<ATTEMPTED>: The problem has been attempted, but the student
5704: does not know if they are correct. (The ellipsis icon.)
5705:
5706: =item * B<ERROR>: There is an error retrieving information about this
5707: problem.
5708:
5709: =back
5710:
5711: =cut
5712:
5713: # This hash maps the composite status to this simple status, and
5714: # can be used directly, if you like
5715: my %compositeToSimple =
5716: (
5717: NETWORK_FAILURE() => ERROR,
5718: NOTHING_SET() => CLOSED,
5719: CORRECT() => CORRECT,
1.332 albertel 5720: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
1.224 bowersj2 5721: EXCUSED() => CORRECT,
5722: PAST_DUE_NO_ANSWER() => INCORRECT,
5723: PAST_DUE_ANSWER_LATER() => INCORRECT,
5724: ANSWER_OPEN() => INCORRECT,
5725: OPEN_LATER() => CLOSED,
5726: TRIES_LEFT() => OPEN,
5727: INCORRECT() => INCORRECT,
5728: OPEN() => OPEN,
5729: ATTEMPTED() => ATTEMPTED,
1.450 raeburn 5730: CREDIT_ATTEMPTED() => CORRECT,
1.224 bowersj2 5731: ANSWER_SUBMITTED() => ATTEMPTED
5732: );
5733:
5734: sub simpleStatus {
5735: my $self = shift;
5736: my $part = shift;
5737: my $status = $self->status($part);
5738: return $compositeToSimple{$status};
1.225 bowersj2 5739: }
5740:
5741: =pod
5742:
5743: B<simpleStatusCount> will return an array reference containing, in
5744: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
5745: and ERROR parts the given problem has.
5746:
5747: =cut
5748:
5749: # This maps the status to the slot we want to increment
5750: my %statusToSlotMap =
5751: (
5752: OPEN() => 0,
5753: CLOSED() => 1,
5754: CORRECT() => 2,
5755: INCORRECT() => 3,
5756: ATTEMPTED() => 4,
5757: ERROR() => 5
5758: );
5759:
5760: sub statusToSlot { return $statusToSlotMap{shift()}; }
5761:
5762: sub simpleStatusCount {
5763: my $self = shift;
5764:
5765: my @counts = (0, 0, 0, 0, 0, 0, 0);
5766: foreach my $part (@{$self->parts()}) {
5767: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
5768: }
5769:
5770: return \@counts;
1.191 bowersj2 5771: }
5772:
5773: =pod
5774:
5775: B<Completable>
5776:
5777: The completable method represents the concept of I<whether the student can
5778: currently do the problem>. If the student can do the problem, which means
5779: that it is open, there are tries left, and if the problem is manually graded
5780: or the grade is suppressed via problemstatus, the student has not tried it
5781: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
5782: either the student has tried it and there is no feedback, or that for
5783: some reason it is no longer completable (not open yet, successfully completed,
5784: out of tries, etc.). As an example, this is used as the filter for the
5785: "Uncompleted Homework" option for the nav maps.
5786:
5787: If this does not quite meet your needs, do not fiddle with it (unless you are
5788: fixing it to better match the student's conception of "completable" because
5789: it's broken somehow)... make a new method.
5790:
5791: =cut
5792:
5793: sub completable {
5794: my $self = shift;
5795: if (!$self->is_problem()) { return 0; }
5796: my $partCount = $self->countParts();
5797:
5798: foreach my $part (@{$self->parts()}) {
5799: if ($part eq '0' && $partCount != 1) { next; }
5800: my $status = $self->status($part);
5801: # "If any of the parts are open, or have tries left (implies open),
5802: # and it is not "attempted" (manually graded problem), it is
5803: # not "complete"
1.216 bowersj2 5804: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
1.450 raeburn 5805: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
1.216 bowersj2 5806: $status == ANSWER_SUBMITTED() ) {
5807: # did this part already, as well as we can
5808: next;
5809: }
5810: if ($status == OPEN() || $status == TRIES_LEFT()) {
5811: return 1;
5812: }
1.191 bowersj2 5813: }
5814:
5815: # If all the parts were complete, so was this problem.
1.216 bowersj2 5816: return 0;
1.51 bowersj2 5817: }
5818:
5819: =pod
5820:
1.507 raeburn 5821: B<Answerable>
5822:
5823: The answerable method differs from the completable method in its handling of problem parts
5824: for which feedback on correctness is suppressed, but the student still has tries left, and
5825: the problem part is not past due, (i.e., the student could submit a different answer if
5826: he/she so chose). For that case completable will return 0, whereas answerable will return 1.
5827:
5828: =cut
5829:
5830: sub answerable {
5831: my $self = shift;
5832: if (!$self->is_problem()) { return 0; }
5833: my $partCount = $self->countParts();
5834: foreach my $part (@{$self->parts()}) {
5835: if ($part eq '0' && $partCount != 1) { next; }
5836: my $status = $self->status($part);
5837: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
5838: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
5839: $status == ANSWER_SUBMITTED() ) {
5840: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
5841: return 1;
5842: }
5843: }
5844: if ($status == OPEN() || $status == TRIES_LEFT() || $status == NETWORK_FAILURE()) {
5845: return 1;
5846: }
5847: }
5848: # None of the parts were answerable, so neither is this problem.
5849: return 0;
5850: }
5851:
5852: =pod
5853:
1.51 bowersj2 5854: =head2 Resource/Nav Map Navigation
5855:
5856: =over 4
5857:
1.174 albertel 5858: =item * B<getNext>():
5859:
5860: Retreive an array of the possible next resources after this
5861: one. Always returns an array, even in the one- or zero-element case.
5862:
5863: =item * B<getPrevious>():
1.85 bowersj2 5864:
1.174 albertel 5865: Retreive an array of the possible previous resources from this
5866: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 5867:
5868: =cut
5869:
5870: sub getNext {
5871: my $self = shift;
5872: my @branches;
5873: my $to = $self->to();
1.85 bowersj2 5874: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 5875: my $choice = $self->{NAV_MAP}->getById($branch);
1.342 albertel 5876: #if (!$choice->condition()) { next; }
1.51 bowersj2 5877: my $next = $choice->goesto();
5878: $next = $self->{NAV_MAP}->getById($next);
5879:
1.131 bowersj2 5880: push @branches, $next;
1.85 bowersj2 5881: }
5882: return \@branches;
5883: }
5884:
5885: sub getPrevious {
5886: my $self = shift;
5887: my @branches;
5888: my $from = $self->from();
1.504 raeburn 5889: foreach my $branch ( split(/,/, $from)) {
1.85 bowersj2 5890: my $choice = $self->{NAV_MAP}->getById($branch);
5891: my $prev = $choice->comesfrom();
5892: $prev = $self->{NAV_MAP}->getById($prev);
5893:
1.131 bowersj2 5894: push @branches, $prev;
1.51 bowersj2 5895: }
5896: return \@branches;
1.131 bowersj2 5897: }
5898:
5899: sub browsePriv {
5900: my $self = shift;
1.505 raeburn 5901: my $noblockcheck = shift;
1.131 bowersj2 5902: if (defined($self->{BROWSE_PRIV})) {
5903: return $self->{BROWSE_PRIV};
5904: }
5905:
1.311 albertel 5906: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
1.508 damieng 5907: $self->{SYMB},undef,
1.505 raeburn 5908: undef,$noblockcheck);
1.51 bowersj2 5909: }
5910:
5911: =pod
1.2 www 5912:
1.51 bowersj2 5913: =back
1.2 www 5914:
1.51 bowersj2 5915: =cut
1.2 www 5916:
1.51 bowersj2 5917: 1;
1.2 www 5918:
1.51 bowersj2 5919: __END__
1.2 www 5920:
5921:
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