Annotation of loncom/interface/lonnavmaps.pm, revision 1.411
1.2 www 1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
1.1 www 3: #
1.411 ! raeburn 4: # $Id: lonnavmaps.pm,v 1.410 2008/01/20 01:52:47 raeburn Exp $
1.20 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.245 www 28: ###
1.2 www 29:
1.1 www 30: package Apache::lonnavmaps;
31:
32: use strict;
1.317 albertel 33: use GDBM_File;
1.18 albertel 34: use Apache::loncommon();
1.305 albertel 35: use Apache::lonenc();
1.229 www 36: use Apache::lonlocal;
1.306 foxr 37: use Apache::lonnet;
1.73 bowersj2 38: use POSIX qw (floor strftime);
1.316 albertel 39: use Time::HiRes qw( gettimeofday tv_interval );
1.384 www 40: use LONCAPA;
1.403 albertel 41: use DateTime();
1.2 www 42:
1.133 bowersj2 43: # symbolic constants
44: sub SYMB { return 1; }
45: sub URL { return 2; }
46: sub NOTHING { return 3; }
47:
48: # Some data
49:
1.140 bowersj2 50: my $resObj = "Apache::lonnavmaps::resource";
51:
1.135 bowersj2 52: # Keep these mappings in sync with lonquickgrades, which uses the colors
53: # instead of the icons.
54: my %statusIconMap =
1.224 bowersj2 55: (
56: $resObj->CLOSED => '',
57: $resObj->OPEN => 'navmap.open.gif',
58: $resObj->CORRECT => 'navmap.correct.gif',
1.355 www 59: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
1.224 bowersj2 60: $resObj->INCORRECT => 'navmap.wrong.gif',
61: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
62: $resObj->ERROR => ''
63: );
1.135 bowersj2 64:
65: my %iconAltTags =
66: ( 'navmap.correct.gif' => 'Correct',
67: 'navmap.wrong.gif' => 'Incorrect',
68: 'navmap.open.gif' => 'Open' );
1.133 bowersj2 69:
1.136 bowersj2 70: # Defines a status->color mapping, null string means don't color
71: my %colormap =
1.140 bowersj2 72: ( $resObj->NETWORK_FAILURE => '',
73: $resObj->CORRECT => '',
74: $resObj->EXCUSED => '#3333FF',
75: $resObj->PAST_DUE_ANSWER_LATER => '',
76: $resObj->PAST_DUE_NO_ANSWER => '',
77: $resObj->ANSWER_OPEN => '#006600',
78: $resObj->OPEN_LATER => '',
79: $resObj->TRIES_LEFT => '',
80: $resObj->INCORRECT => '',
81: $resObj->OPEN => '',
1.207 bowersj2 82: $resObj->NOTHING_SET => '',
83: $resObj->ATTEMPTED => '',
1.332 albertel 84: $resObj->ANSWER_SUBMITTED => '',
85: $resObj->PARTIALLY_CORRECT => '#006600'
1.207 bowersj2 86: );
1.136 bowersj2 87: # And a special case in the nav map; what to do when the assignment
1.398 banghart 88: # is not yet done and due in less than 24 hours
1.136 bowersj2 89: my $hurryUpColor = "#FF0000";
1.130 www 90:
1.269 albertel 91: sub close {
1.320 albertel 92: if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
1.269 albertel 93: return(<<ENDCLOSE);
94: <script type="text/javascript">
95: window.status='Accessing Nav Control';
96: menu=window.open("/adm/rat/empty.html","loncapanav",
97: "height=600,width=400,scrollbars=1");
98: window.status='Closing Nav Control';
99: menu.close();
100: window.status='Done.';
101: </script>
102: ENDCLOSE
103: }
1.268 albertel 104:
1.270 albertel 105: sub update {
1.320 albertel 106: if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
107: if (!$env{'request.course.id'}) { return ''; }
1.270 albertel 108: if ($ENV{'REQUEST_URI'}=~m|^/adm/navmaps|) { return ''; }
109: return(<<ENDUPDATE);
110: <form name="navform"></form>
111: <script type="text/javascript">
112: this.document.navform.action='/adm/navmaps#curloc';
113: this.document.navform.target='loncapanav';
114: this.document.navform.submit();
115: </script>
116: ENDUPDATE
117: }
1.268 albertel 118:
1.51 bowersj2 119: # Convenience functions: Returns a string that adds or subtracts
120: # the second argument from the first hash, appropriate for the
121: # query string that determines which folders to recurse on
122: sub addToFilter {
123: my $hashIn = shift;
124: my $addition = shift;
125: my %hash = %$hashIn;
126: $hash{$addition} = 1;
127:
128: return join (",", keys(%hash));
129: }
130:
131: sub removeFromFilter {
132: my $hashIn = shift;
133: my $subtraction = shift;
134: my %hash = %$hashIn;
135:
136: delete $hash{$subtraction};
137: return join(",", keys(%hash));
138: }
139:
140: # Convenience function: Given a stack returned from getStack on the iterator,
141: # return the correct src() value.
142: sub getLinkForResource {
143: my $stack = shift;
144: my $res;
145:
146: # Check to see if there are any pages in the stack
147: foreach $res (@$stack) {
1.248 www 148: if (defined($res)) {
1.308 albertel 149: my $anchor;
1.248 www 150: if ($res->is_page()) {
1.394 raeburn 151: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
1.384 www 152: $anchor=&escape($anchor->shown_symb());
1.308 albertel 153: return ($res->link(),$res->shown_symb(),$anchor);
1.248 www 154: }
155: # in case folder was skipped over as "only sequence"
156: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
157: if ($map=~/\.page$/) {
1.308 albertel 158: my $url=&Apache::lonnet::clutter($map);
1.384 www 159: $anchor=&escape($src->shown_symb());
1.308 albertel 160: return ($url,$res->shown_symb(),$anchor);
1.248 www 161: }
1.51 bowersj2 162: }
163: }
164:
165: # Failing that, return the src of the last resource that is defined
166: # (when we first recurse on a map, it puts an undefined resource
167: # on the bottom because $self->{HERE} isn't defined yet, and we
168: # want the src for the map anyhow)
1.394 raeburn 169: foreach my $item (@$stack) {
170: if (defined($item)) { $res = $item; }
1.51 bowersj2 171: }
172:
1.401 albertel 173: if ($res) {
174: return ($res->link(),$res->shown_symb());
175: }
176: return;
1.51 bowersj2 177: }
178:
1.251 www 179: # Convenience function: This separates the logic of how to create
1.53 bowersj2 180: # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
1.251 www 181: # etc.) into a separate function. It takes a resource object as the
1.53 bowersj2 182: # first parameter, and the part number of the resource as the second.
183: # It's basically a big switch statement on the status of the resource.
184:
185: sub getDescription {
186: my $res = shift;
187: my $part = shift;
1.69 bowersj2 188: my $status = $res->status($part);
1.53 bowersj2 189:
1.407 raeburn 190: my $open = $res->opendate($part);
191: my $due = $res->duedate($part);
192: my $answer = $res->answerdate($part);
193:
1.182 bowersj2 194: if ($status == $res->NETWORK_FAILURE) {
1.229 www 195: return &mt("Having technical difficulties; please check status later");
1.182 bowersj2 196: }
1.53 bowersj2 197: if ($status == $res->NOTHING_SET) {
1.229 www 198: return &mt("Not currently assigned.");
1.53 bowersj2 199: }
200: if ($status == $res->OPEN_LATER) {
1.407 raeburn 201: return "Open " .timeToHumanString($open,'start');
1.53 bowersj2 202: }
203: if ($status == $res->OPEN) {
1.407 raeburn 204: if ($due) {
1.402 albertel 205: if ($res->is_practice()) {
1.407 raeburn 206: return &mt("Closes ")." " .timeToHumanString($due,'start');
1.402 albertel 207: } else {
1.407 raeburn 208: return &mt("Due")." " .timeToHumanString($due,'end');
1.402 albertel 209: }
1.66 bowersj2 210: } else {
1.229 www 211: return &mt("Open, no due date");
1.66 bowersj2 212: }
1.53 bowersj2 213: }
1.54 bowersj2 214: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.407 raeburn 215: return &mt("Answer open")." " .timeToHumanString($answer,'start');
1.54 bowersj2 216: }
217: if ($status == $res->PAST_DUE_NO_ANSWER) {
1.402 albertel 218: if ($res->is_practice()) {
1.407 raeburn 219: return &mt("Closed")." " . timeToHumanString($due,'start');
1.402 albertel 220: } else {
1.407 raeburn 221: return &mt("Was due")." " . timeToHumanString($due,'end');
1.402 albertel 222: }
1.53 bowersj2 223: }
1.357 albertel 224: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
225: && $res->handgrade($part) ne 'yes') {
1.229 www 226: return &mt("Answer available");
1.53 bowersj2 227: }
1.59 bowersj2 228: if ($status == $res->EXCUSED) {
1.229 www 229: return &mt("Excused by instructor");
1.59 bowersj2 230: }
1.69 bowersj2 231: if ($status == $res->ATTEMPTED) {
1.229 www 232: return &mt("Answer submitted, not yet graded");
1.69 bowersj2 233: }
1.59 bowersj2 234: if ($status == $res->TRIES_LEFT) {
1.79 bowersj2 235: my $tries = $res->tries($part);
236: my $maxtries = $res->maxtries($part);
237: my $triesString = "";
238: if ($tries && $maxtries) {
239: $triesString = "<font size=\"-1\"><i>($tries of $maxtries tries used)</i></font>";
240: if ($maxtries > 1 && $maxtries - $tries == 1) {
241: $triesString = "<b>$triesString</b>";
242: }
243: }
1.407 raeburn 244: if ($due) {
245: return &mt("Due")." " . timeToHumanString($due,'end') .
1.66 bowersj2 246: " $triesString";
247: } else {
1.229 www 248: return &mt("No due date")." $triesString";
1.66 bowersj2 249: }
1.59 bowersj2 250: }
1.185 bowersj2 251: if ($status == $res->ANSWER_SUBMITTED) {
1.229 www 252: return &mt('Answer submitted');
1.185 bowersj2 253: }
1.53 bowersj2 254: }
255:
1.398 banghart 256: # Convenience function, so others can use it: Is the problem due in less than
1.115 bowersj2 257: # 24 hours, and still can be done?
258:
1.252 matthew 259: sub dueInLessThan24Hours {
1.115 bowersj2 260: my $res = shift;
261: my $part = shift;
262: my $status = $res->status($part);
263:
1.207 bowersj2 264: return ($status == $res->OPEN() ||
1.115 bowersj2 265: $status == $res->TRIES_LEFT()) &&
1.244 albertel 266: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
267: $res->duedate($part) > time();
1.115 bowersj2 268: }
269:
270: # Convenience function, so others can use it: Is there only one try remaining for the
1.398 banghart 271: # part, with more than one try to begin with, not due yet and still can be done?
1.115 bowersj2 272: sub lastTry {
273: my $res = shift;
274: my $part = shift;
275:
276: my $tries = $res->tries($part);
277: my $maxtries = $res->maxtries($part);
278: return $tries && $maxtries && $maxtries > 1 &&
1.244 albertel 279: $maxtries - $tries == 1 && $res->duedate($part) &&
280: $res->duedate($part) > time();
1.115 bowersj2 281: }
282:
1.320 albertel 283: # This puts a human-readable name on the env variable.
1.177 www 284:
1.68 bowersj2 285: sub advancedUser {
1.320 albertel 286: return $env{'request.role.adv'};
1.68 bowersj2 287: }
288:
1.73 bowersj2 289:
290: # timeToHumanString takes a time number and converts it to a
291: # human-readable representation, meant to be used in the following
292: # manner:
293: # print "Due $timestring"
294: # print "Open $timestring"
295: # print "Answer available $timestring"
296: # Very, very, very, VERY English-only... goodness help a localizer on
297: # this func...
1.347 www 298:
299:
1.53 bowersj2 300: sub timeToHumanString {
1.346 foxr 301: my ($time,$type,$format) = @_;
302:
1.58 albertel 303: # zero, '0' and blank are bad times
1.73 bowersj2 304: if (!$time) {
1.229 www 305: return &mt('never');
1.73 bowersj2 306: }
1.231 www 307: unless (&Apache::lonlocal::current_language()=~/^en/) {
1.237 www 308: return &Apache::lonlocal::locallocaltime($time);
1.229 www 309: }
1.73 bowersj2 310: my $now = time();
311:
312: # Positive = future
313: my $delta = $time - $now;
314:
315: my $minute = 60;
316: my $hour = 60 * $minute;
317: my $day = 24 * $hour;
318: my $week = 7 * $day;
319: my $inPast = 0;
320:
321: # Logic in comments:
322: # Is it now? (extremely unlikely)
323: if ( $delta == 0 ) {
324: return "this instant";
325: }
326:
327: if ($delta < 0) {
328: $inPast = 1;
329: $delta = -$delta;
330: }
331:
332: if ( $delta > 0 ) {
1.101 bowersj2 333:
1.73 bowersj2 334: my $tense = $inPast ? " ago" : "";
335: my $prefix = $inPast ? "" : "in ";
1.101 bowersj2 336:
1.398 banghart 337: # Less than a minute
1.73 bowersj2 338: if ( $delta < $minute ) {
339: if ($delta == 1) { return "${prefix}1 second$tense"; }
340: return "$prefix$delta seconds$tense";
341: }
342:
1.398 banghart 343: # Less than an hour
1.73 bowersj2 344: if ( $delta < $hour ) {
345: # If so, use minutes
346: my $minutes = floor($delta / 60);
347: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
348: return "$prefix$minutes minutes$tense";
349: }
350:
1.398 banghart 351: # Is it less than 24 hours away? If so,
1.73 bowersj2 352: # display hours + minutes
353: if ( $delta < $hour * 24) {
354: my $hours = floor($delta / $hour);
355: my $minutes = floor(($delta % $hour) / $minute);
356: my $hourString = "$hours hours";
357: my $minuteString = ", $minutes minutes";
358: if ($hours == 1) {
359: $hourString = "1 hour";
360: }
361: if ($minutes == 1) {
362: $minuteString = ", 1 minute";
363: }
364: if ($minutes == 0) {
365: $minuteString = "";
366: }
367: return "$prefix$hourString$minuteString$tense";
368: }
369:
1.403 albertel 370: my $dt = DateTime->from_epoch(epoch => $time)
371: ->set_time_zone(&Apache::lonlocal::gettimezone());
372:
1.346 foxr 373: # If there's a caller supplied format, use it.
374:
1.403 albertel 375: if ($format ne '') {
376: my $timeStr = $dt->strftime($format);
377: return $timeStr.' ('.$dt->time_zone_short_name().')';
1.346 foxr 378: }
379:
1.398 banghart 380: # Less than 5 days away, display day of the week and
1.73 bowersj2 381: # HH:MM
1.346 foxr 382:
1.73 bowersj2 383: if ( $delta < $day * 5 ) {
1.403 albertel 384: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
1.238 albertel 385: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 386: $timeStr =~ s/12:00 pm/noon/;
1.333 albertel 387: return ($inPast ? "last " : "this ") .
1.403 albertel 388: $timeStr;
1.73 bowersj2 389: }
390:
1.341 albertel 391: my $conjunction='on';
392: if ($type eq 'start') {
393: $conjunction='at';
394: } elsif ($type eq 'end') {
395: $conjunction='by';
396: }
1.73 bowersj2 397: # Is it this year?
1.403 albertel 398: my $dt_now = DateTime->from_epoch(epoch => $now)
399: ->set_time_zone(&Apache::lonlocal::gettimezone());
400: if ( $dt->year() == $dt_now->year()) {
1.73 bowersj2 401: # Return on Month Day, HH:MM meridian
1.403 albertel 402: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
1.238 albertel 403: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 404: $timeStr =~ s/12:00 pm/noon/;
1.403 albertel 405: return $timeStr;
1.73 bowersj2 406: }
407:
408: # Not this year, so show the year
1.403 albertel 409: my $timeStr =
410: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
1.238 albertel 411: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 412: $timeStr =~ s/12:00 pm/noon/;
1.403 albertel 413: return $timeStr;
1.58 albertel 414: }
1.53 bowersj2 415: }
416:
1.51 bowersj2 417:
1.133 bowersj2 418: =pod
419:
1.174 albertel 420: =head1 NAME
421:
1.217 bowersj2 422: Apache::lonnavmap - Subroutines to handle and render the navigation
423: maps
1.174 albertel 424:
425: =head1 SYNOPSIS
426:
427: The main handler generates the navigational listing for the course,
428: the other objects export this information in a usable fashion for
1.205 bowersj2 429: other modules.
1.133 bowersj2 430:
1.216 bowersj2 431: =head1 OVERVIEW
432:
1.217 bowersj2 433: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
1.218 bowersj2 434: course structure and caches it in what is often referred to as the
435: "big hash" X<big hash>. You can see it if you are logged into
436: LON-CAPA, in a course, by going to /adm/test. (You may need to
437: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
438: content of the hash will be under the heading "Big Hash".
1.216 bowersj2 439:
440: Big Hash contains, among other things, how resources are related
441: to each other (next/previous), what resources are maps, which
442: resources are being chosen to not show to the student (for random
443: selection), and a lot of other things that can take a lot of time
444: to compute due to the amount of data that needs to be collected and
445: processed.
446:
447: Apache::lonnavmaps provides an object model for manipulating this
1.398 banghart 448: information in a higher-level fashion than directly manipulating
1.216 bowersj2 449: the hash. It also provides access to several auxilary functions
450: that aren't necessarily stored in the Big Hash, but are a per-
451: resource sort of value, like whether there is any feedback on
452: a given resource.
453:
454: Apache::lonnavmaps also abstracts away branching, and someday,
455: conditions, for the times where you don't really care about those
456: things.
457:
458: Apache::lonnavmaps also provides fairly powerful routines for
459: rendering navmaps, and last but not least, provides the navmaps
460: view for when the user clicks the NAV button.
461:
462: B<Note>: Apache::lonnavmaps I<only> works for the "currently
463: logged in user"; if you want things like "due dates for another
464: student" lonnavmaps can not directly retrieve information like
465: that. You need the EXT function. This module can still help,
466: because many things, such as the course structure, are constant
467: between users, and Apache::lonnavmaps can help by providing
468: symbs for the EXT call.
469:
470: The rest of this file will cover the provided rendering routines,
471: which can often be used without fiddling with the navmap object at
472: all, then documents the Apache::lonnavmaps::navmap object, which
473: is the key to accessing the Big Hash information, covers the use
474: of the Iterator (which provides the logic for traversing the
475: somewhat-complicated Big Hash data structure), documents the
476: Apache::lonnavmaps::Resource objects that are returned by
477:
1.205 bowersj2 478: =head1 Subroutine: render
1.133 bowersj2 479:
1.174 albertel 480: The navmap renderer package provides a sophisticated rendering of the
481: standard navigation maps interface into HTML. The provided nav map
482: handler is actually just a glorified call to this.
1.133 bowersj2 483:
1.216 bowersj2 484: Because of the large number of parameters this function accepts,
1.174 albertel 485: instead of passing it arguments as is normal, pass it in an anonymous
1.216 bowersj2 486: hash with the desired options.
1.174 albertel 487:
488: The package provides a function called 'render', called as
1.205 bowersj2 489: Apache::lonnavmaps::render({}).
1.51 bowersj2 490:
1.133 bowersj2 491: =head2 Overview of Columns
1.51 bowersj2 492:
1.174 albertel 493: The renderer will build an HTML table for the navmap and return
1.398 banghart 494: it. The table consists of several columns, and a row for each
1.174 albertel 495: resource (or possibly each part). You tell the renderer how many
496: columns to create and what to place in each column, optionally using
1.205 bowersj2 497: one or more of the prepared columns, and the renderer will assemble
1.174 albertel 498: the table.
499:
500: Any additional generally useful column types should be placed in the
501: renderer code here, so anybody can use it anywhere else. Any code
502: specific to the current application (such as the addition of <input>
503: elements in a column) should be placed in the code of the thing using
504: the renderer.
505:
506: At the core of the renderer is the array reference COLS (see Example
507: section below for how to pass this correctly). The COLS array will
508: consist of entries of one of two types of things: Either an integer
509: representing one of the pre-packaged column types, or a sub reference
510: that takes a resource reference, a part number, and a reference to the
511: argument hash passed to the renderer, and returns a string that will
512: be inserted into the HTML representation as it.
513:
1.216 bowersj2 514: All other parameters are ways of either changing how the columns
515: are printing, or which rows are shown.
516:
1.174 albertel 517: The pre-packaged column names are refered to by constants in the
1.205 bowersj2 518: Apache::lonnavmaps namespace. The following currently exist:
1.51 bowersj2 519:
1.174 albertel 520: =over 4
1.51 bowersj2 521:
1.216 bowersj2 522: =item * B<Apache::lonnavmaps::resource>:
1.51 bowersj2 523:
1.174 albertel 524: The general info about the resource: Link, icon for the type, etc. The
1.216 bowersj2 525: first column in the standard nav map display. This column provides the
526: indentation effect seen in the B<NAV> screen. This column also accepts
1.205 bowersj2 527: the following parameters in the renderer hash:
1.51 bowersj2 528:
1.133 bowersj2 529: =over 4
1.51 bowersj2 530:
1.216 bowersj2 531: =item * B<resource_nolink>: default false
1.51 bowersj2 532:
1.216 bowersj2 533: If true, the resource will not be linked. By default, all non-folder
534: resources are linked.
1.174 albertel 535:
1.216 bowersj2 536: =item * B<resource_part_count>: default true
1.51 bowersj2 537:
1.216 bowersj2 538: If true, the resource will show a part count B<if> the full
539: part list is not displayed. (See "condense_parts" later.) If false,
540: the resource will never show a part count.
1.133 bowersj2 541:
1.174 albertel 542: =item * B<resource_no_folder_link>:
1.133 bowersj2 543:
1.174 albertel 544: If true, the resource's folder will not be clickable to open or close
545: it. Default is false. True implies printCloseAll is false, since you
546: can't close or open folders when this is on anyhow.
1.144 bowersj2 547:
1.133 bowersj2 548: =back
1.51 bowersj2 549:
1.225 bowersj2 550: =item * B<Apache::lonnavmaps::communication_status>:
1.174 albertel 551:
552: Whether there is discussion on the resource, email for the user, or
553: (lumped in here) perl errors in the execution of the problem. This is
554: the second column in the main nav map.
555:
1.225 bowersj2 556: =item * B<Apache::lonnavmaps::quick_status>:
1.51 bowersj2 557:
1.216 bowersj2 558: An icon for the status of a problem, with five possible states:
559: Correct, incorrect, open, awaiting grading (for a problem where the
560: computer's grade is suppressed, or the computer can't grade, like
561: essay problem), or none (not open yet, not a problem). The
1.174 albertel 562: third column of the standard navmap.
1.51 bowersj2 563:
1.225 bowersj2 564: =item * B<Apache::lonnavmaps::long_status>:
1.174 albertel 565:
566: A text readout of the details of the current status of the problem,
567: such as "Due in 22 hours". The fourth column of the standard navmap.
1.51 bowersj2 568:
1.225 bowersj2 569: =item * B<Apache::lonnavmaps::part_status_summary>:
570:
571: A text readout summarizing the status of the problem. If it is a
572: single part problem, will display "Correct", "Incorrect",
573: "Not yet open", "Open", "Attempted", or "Error". If there are
574: multiple parts, this will output a string that in HTML will show a
575: status of how many parts are in each status, in color coding, trying
576: to match the colors of the icons within reason.
577:
578: Note this only makes sense if you are I<not> showing parts. If
579: C<showParts> is true (see below), this column will not output
580: anything.
581:
1.133 bowersj2 582: =back
1.51 bowersj2 583:
1.133 bowersj2 584: If you add any others please be sure to document them here.
1.51 bowersj2 585:
1.174 albertel 586: An example of a column renderer that will show the ID number of a
587: resource, along with the part name if any:
1.51 bowersj2 588:
1.133 bowersj2 589: sub {
590: my ($resource, $part, $params) = @_;
591: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
592: return '<td>' . $resource->{ID} . '</td>';
593: }
1.51 bowersj2 594:
1.174 albertel 595: Note these functions are responsible for the TD tags, which allow them
596: to override vertical and horizontal alignment, etc.
1.130 www 597:
1.133 bowersj2 598: =head2 Parameters
1.115 bowersj2 599:
1.217 bowersj2 600: Minimally, you should be
1.174 albertel 601: able to get away with just using 'cols' (to specify the columns
602: shown), 'url' (necessary for the folders to link to the current screen
603: correctly), and possibly 'queryString' if your app calls for it. In
604: that case, maintaining the state of the folders will be done
605: automatically.
1.140 bowersj2 606:
1.133 bowersj2 607: =over 4
1.51 bowersj2 608:
1.320 albertel 609: =item * B<iterator>: default: constructs one from %env
1.174 albertel 610:
611: A reference to a fresh ::iterator to use from the navmaps. The
612: rendering will reflect the options passed to the iterator, so you can
613: use that to just render a certain part of the course, if you like. If
614: one is not passed, the renderer will attempt to construct one from
1.320 albertel 615: env{'form.filter'} and env{'form.condition'} information, plus the
1.174 albertel 616: 'iterator_map' parameter if any.
617:
1.216 bowersj2 618: =item * B<iterator_map>: default: not used
1.174 albertel 619:
620: If you are letting the renderer do the iterator handling, you can
621: instruct the renderer to render only a particular map by passing it
622: the source of the map you want to process, like
623: '/res/103/jerf/navmap.course.sequence'.
624:
1.401 albertel 625: =item * B<include_top_level_map>: default: false
626:
627: If you need to include the top level map (meaning the course) in the
628: rendered output set this to true
629:
1.320 albertel 630: =item * B<navmap>: default: constructs one from %env
1.174 albertel 631:
632: A reference to a navmap, used only if an iterator is not passed in. If
633: this is necessary to make an iterator but it is not passed in, a new
1.320 albertel 634: one will be constructed based on env info. This is useful to do basic
1.174 albertel 635: error checking before passing it off to render.
636:
1.216 bowersj2 637: =item * B<r>: default: must be passed in
1.174 albertel 638:
639: The standard Apache response object. This must be passed to the
640: renderer or the course hash will be locked.
641:
1.216 bowersj2 642: =item * B<cols>: default: empty (useless)
1.174 albertel 643:
644: An array reference
645:
1.216 bowersj2 646: =item * B<showParts>:default true
1.174 albertel 647:
1.216 bowersj2 648: A flag. If true, a line for the resource itself, and a line
1.174 albertel 649: for each part will be displayed. If not, only one line for each
650: resource will be displayed.
651:
1.216 bowersj2 652: =item * B<condenseParts>: default true
1.174 albertel 653:
1.216 bowersj2 654: A flag. If true, if all parts of the problem have the same
1.174 albertel 655: status and that status is Nothing Set, Correct, or Network Failure,
656: then only one line will be displayed for that resource anyhow. If no,
657: all parts will always be displayed. If showParts is 0, this is
658: ignored.
659:
1.320 albertel 660: =item * B<jumpCount>: default: determined from %env
1.174 albertel 661:
1.216 bowersj2 662: A string identifying the URL to place the anchor 'curloc' at.
663: It is the responsibility of the renderer user to
1.174 albertel 664: ensure that the #curloc is in the URL. By default, determined through
1.320 albertel 665: the use of the env{} 'jump' information, and should normally "just
1.174 albertel 666: work" correctly.
1.144 bowersj2 667:
1.216 bowersj2 668: =item * B<here>: default: empty string
1.140 bowersj2 669:
1.216 bowersj2 670: A Symb identifying where to place the 'here' marker. The empty
671: string means no marker.
1.92 bowersj2 672:
1.216 bowersj2 673: =item * B<indentString>: default: 25 pixel whitespace image
1.164 bowersj2 674:
1.216 bowersj2 675: A string identifying the indentation string to use.
1.92 bowersj2 676:
1.216 bowersj2 677: =item * B<queryString>: default: empty
1.51 bowersj2 678:
1.174 albertel 679: A string which will be prepended to the query string used when the
1.216 bowersj2 680: folders are opened or closed. You can use this to pass
681: application-specific values.
1.55 bowersj2 682:
1.216 bowersj2 683: =item * B<url>: default: none
1.84 bowersj2 684:
1.174 albertel 685: The url the folders will link to, which should be the current
1.216 bowersj2 686: page. Required if the resource info column is shown, and you
687: are allowing the user to open and close folders.
1.115 bowersj2 688:
1.216 bowersj2 689: =item * B<currentJumpIndex>: default: no jumping
1.55 bowersj2 690:
1.174 albertel 691: Describes the currently-open row number to cause the browser to jump
692: to, because the user just opened that folder. By default, pulled from
1.320 albertel 693: the Jump information in the env{'form.*'}.
1.51 bowersj2 694:
1.216 bowersj2 695: =item * B<printKey>: default: false
1.51 bowersj2 696:
1.174 albertel 697: If true, print the key that appears on the top of the standard
1.216 bowersj2 698: navmaps.
1.139 bowersj2 699:
1.216 bowersj2 700: =item * B<printCloseAll>: default: true
1.140 bowersj2 701:
1.174 albertel 702: If true, print the "Close all folders" or "open all folders"
1.216 bowersj2 703: links.
1.140 bowersj2 704:
1.216 bowersj2 705: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.153 bowersj2 706:
1.174 albertel 707: A function that takes the resource object as its only parameter and
708: returns a true or false value. If true, the resource is displayed. If
1.216 bowersj2 709: false, it is simply skipped in the display.
1.174 albertel 710:
1.216 bowersj2 711: =item * B<suppressEmptySequences>: default: false
1.190 bowersj2 712:
713: If you're using a filter function, and displaying sequences to orient
714: the user, then frequently some sequences will be empty. Setting this to
715: true will cause those sequences not to display, so as not to confuse the
716: user into thinking that if the sequence is there there should be things
1.216 bowersj2 717: under it; for example, see the "Show Uncompleted Homework" view on the
718: B<NAV> screen.
1.190 bowersj2 719:
1.216 bowersj2 720: =item * B<suppressNavmaps>: default: false
1.174 albertel 721:
1.216 bowersj2 722: If true, will not display Navigate Content resources.
1.143 bowersj2 723:
1.133 bowersj2 724: =back
1.51 bowersj2 725:
1.133 bowersj2 726: =head2 Additional Info
1.51 bowersj2 727:
1.174 albertel 728: In addition to the parameters you can pass to the renderer, which will
729: be passed through unchange to the column renderers, the renderer will
730: generate the following information which your renderer may find
731: useful:
732:
1.216 bowersj2 733: =over 4
734:
735: =item * B<counter>:
1.145 bowersj2 736:
1.216 bowersj2 737: Contains the number of rows printed. Useful after calling the render
738: function, as you can detect whether anything was printed at all.
739:
740: =item * B<isNewBranch>:
741:
742: Useful for renderers: If this resource is currently the first resource
743: of a new branch, this will be true. The Resource column (leftmost in the
744: navmaps screen) uses this to display the "new branch" icon
1.59 bowersj2 745:
1.133 bowersj2 746: =back
1.59 bowersj2 747:
1.133 bowersj2 748: =cut
1.59 bowersj2 749:
1.133 bowersj2 750: sub resource { return 0; }
751: sub communication_status { return 1; }
752: sub quick_status { return 2; }
753: sub long_status { return 3; }
1.225 bowersj2 754: sub part_status_summary { return 4; }
1.51 bowersj2 755:
1.133 bowersj2 756: sub render_resource {
757: my ($resource, $part, $params) = @_;
1.51 bowersj2 758:
1.133 bowersj2 759: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 760:
1.134 bowersj2 761: my $link = $params->{"resourceLink"};
1.306 foxr 762:
763: # The URL part is not escaped at this point, but the symb is...
764: # The stuff to the left of the ? must have ' replaced by \' since
765: # it will be quoted with ' in the href.
766:
767: my ($left,$right) = split(/\?/, $link);
768: $link = $left.'?'.$right;
769:
1.134 bowersj2 770: my $src = $resource->src();
771: my $it = $params->{"iterator"};
1.133 bowersj2 772: my $filter = $it->{FILTER};
773:
774: my $title = $resource->compTitle();
1.258 albertel 775:
1.133 bowersj2 776: my $partLabel = "";
777: my $newBranchText = "";
1.298 albertel 778: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
1.133 bowersj2 779: # If this is a new branch, label it so
780: if ($params->{'isNewBranch'}) {
1.329 albertel 781: $newBranchText = "<img src='$location/branch.gif' border='0' alt='Branch' />";
1.51 bowersj2 782: }
783:
1.133 bowersj2 784: # links to open and close the folder
1.306 foxr 785:
786:
1.349 foxr 787: my $linkopen = "<a href=\"$link\">";
1.306 foxr 788:
789:
1.133 bowersj2 790: my $linkclose = "</a>";
1.51 bowersj2 791:
1.204 albertel 792: # Default icon: unknown page
1.329 albertel 793: my $icon = "<img src='$location/unknown.gif' alt='' border='0' alt=' ' ' />";
1.133 bowersj2 794:
795: if ($resource->is_problem()) {
1.192 bowersj2 796: if ($part eq '0' || $params->{'condensed'}) {
1.389 albertel 797: $icon = '<img src="'.$location.'/';
798: if ($resource->is_task()) {
799: $icon .= 'task.gif" alt="'.&mt('Task');
800: } else {
801: $icon .= 'problem.gif" alt="'.&mt('Problem');
802: }
803: $icon .='" border="0" />';
1.133 bowersj2 804: } else {
805: $icon = $params->{'indentString'};
806: }
1.204 albertel 807: } else {
1.329 albertel 808: $icon = "<img src='".&Apache::loncommon::icon($resource->src)."' alt=' ' border='0' />";
1.133 bowersj2 809: }
1.51 bowersj2 810:
1.133 bowersj2 811: # Display the correct map icon to open or shut map
812: if ($resource->is_map()) {
813: my $mapId = $resource->map_pc();
814: my $nowOpen = !defined($filter->{$mapId});
815: if ($it->{CONDITION}) {
816: $nowOpen = !$nowOpen;
817: }
1.144 bowersj2 818:
1.205 bowersj2 819: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1.362 www 820: my $title=$resource->title;
1.363 albertel 821: $title=~s/\"/\"/g;
1.144 bowersj2 822: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 823: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.363 albertel 824: $icon = "<img src='$location/$icon' alt=\"".
825: ($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
1.144 bowersj2 826:
1.349 foxr 827: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1.392 albertel 828: $params->{'queryString'} . '&filter=';
1.144 bowersj2 829: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
830: addToFilter($filter, $mapId) :
831: removeFromFilter($filter, $mapId);
1.392 albertel 832: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
833: . $params->{'hereType'} . '&here=' .
1.384 www 834: &escape($params->{'here'}) .
1.392 albertel 835: '&jump=' .
1.384 www 836: &escape($resource->symb()) .
1.392 albertel 837: "&folderManip=1\">";
1.306 foxr 838:
1.144 bowersj2 839: } else {
840: # Don't allow users to manipulate folder
1.205 bowersj2 841: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
1.144 bowersj2 842: '.nomanip.gif';
1.364 www 843: $icon = "<img src='$location/$icon' alt=\"".
844: ($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
1.144 bowersj2 845:
846: $linkopen = "";
847: $linkclose = "";
848: }
1.133 bowersj2 849: }
1.51 bowersj2 850:
1.133 bowersj2 851: if ($resource->randomout()) {
1.362 www 852: $nonLinkedText .= ' <i>('.&mt('hidden').')</i> ';
1.133 bowersj2 853: }
1.342 albertel 854: if (!$resource->condval()) {
1.362 www 855: $nonLinkedText .= ' <i>('.&mt('conditionally hidden').')</i> ';
1.342 albertel 856: }
1.133 bowersj2 857:
858: # We're done preparing and finally ready to start the rendering
1.392 albertel 859: my $result = "<td align='left' valign='middle'>";
1.140 bowersj2 860:
861: my $indentLevel = $params->{'indentLevel'};
862: if ($newBranchText) { $indentLevel--; }
863:
1.133 bowersj2 864: # print indentation
1.140 bowersj2 865: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 866: $result .= $params->{'indentString'};
1.84 bowersj2 867: }
868:
1.133 bowersj2 869: # Decide what to display
1.306 foxr 870:
1.133 bowersj2 871: $result .= "$newBranchText$linkopen$icon$linkclose";
872:
873: my $curMarkerBegin = '';
874: my $curMarkerEnd = '';
1.51 bowersj2 875:
1.133 bowersj2 876: # Is this the current resource?
1.158 bowersj2 877: if (!$params->{'displayedHereMarker'} &&
878: $resource->symb() eq $params->{'here'} ) {
1.345 www 879: $curMarkerBegin = '<font color="red" size="+2">></font>';
1.133 bowersj2 880: $curMarkerEnd = '<font color="red" size="+2"><</font>';
1.158 bowersj2 881: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 882: }
883:
1.192 bowersj2 884: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 885: !$params->{'condensed'}) {
1.274 matthew 886: my $displaypart=$resource->part_display($part);
1.363 albertel 887: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1.384 www 888: if ($link!~/\#/) { $link.='#'.&escape($part); }
1.133 bowersj2 889: $title = "";
1.51 bowersj2 890: }
891:
1.163 bowersj2 892: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.363 albertel 893: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1.51 bowersj2 894: }
895:
1.268 albertel 896: my $target;
1.320 albertel 897: if ($env{'environment.remotenavmap'} eq 'on') {
1.268 albertel 898: $target=' target="loncapaclient" ';
899: }
1.266 raeburn 900: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.349 foxr 901: $result .= " $curMarkerBegin<a $target href=\"$link\">$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
1.144 bowersj2 902: } else {
903: $result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
904: }
1.51 bowersj2 905:
1.133 bowersj2 906: return $result;
907: }
1.51 bowersj2 908:
1.133 bowersj2 909: sub render_communication_status {
910: my ($resource, $part, $params) = @_;
1.134 bowersj2 911: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
912:
913: my $link = $params->{"resourceLink"};
1.335 albertel 914: my $target;
915: if ($env{'environment.remotenavmap'} eq 'on') {
916: $target=' target="loncapaclient" ';
917: }
1.349 foxr 918: my $linkopen = "<a $target href=\"$link\">";
1.134 bowersj2 919: my $linkclose = "</a>";
1.298 albertel 920: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.134 bowersj2 921: if ($resource->hasDiscussion()) {
922: $discussionHTML = $linkopen .
1.392 albertel 923: '<img alt="'.&mt('New Discussion').'" border="0" src="'.$location.'/chat.gif" />' .
1.134 bowersj2 924: $linkclose;
925: }
926:
927: if ($resource->getFeedback()) {
928: my $feedback = $resource->getFeedback();
1.394 raeburn 929: foreach my $msgid (split(/\,/, $feedback)) {
930: if ($msgid) {
1.335 albertel 931: $feedbackHTML .= ' <a '.$target.' href="/adm/email?display='
1.394 raeburn 932: . &escape($msgid) . '">'
1.392 albertel 933: . '<img alt="'.&mt('New Email').'" src="'.$location.'/feedback.gif" '
1.134 bowersj2 934: . 'border="0" /></a>';
935: }
936: }
937: }
938:
939: if ($resource->getErrors()) {
940: my $errors = $resource->getErrors();
1.254 matthew 941: my $errorcount = 0;
1.394 raeburn 942: foreach my $msgid (split(/,/, $errors)) {
1.254 matthew 943: last if ($errorcount>=10); # Only output 10 bombs maximum
1.394 raeburn 944: if ($msgid) {
1.254 matthew 945: $errorcount++;
1.335 albertel 946: $errorHTML .= ' <a '.$target.' href="/adm/email?display='
1.394 raeburn 947: . &escape($msgid) . '">'
1.392 albertel 948: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" '
1.134 bowersj2 949: . 'border="0" /></a>';
950: }
951: }
1.197 bowersj2 952: }
953:
954: if ($params->{'multipart'} && $part != '0') {
955: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 956: }
957:
1.392 albertel 958: return "<td width=\"75\" align=\"left\" valign=\"middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1.134 bowersj2 959:
1.133 bowersj2 960: }
961: sub render_quick_status {
962: my ($resource, $part, $params) = @_;
1.135 bowersj2 963: my $result = "";
964: my $firstDisplayed = !$params->{'condensed'} &&
965: $params->{'multipart'} && $part eq "0";
966:
967: my $link = $params->{"resourceLink"};
1.335 albertel 968: my $target;
969: if ($env{'environment.remotenavmap'} eq 'on') {
970: $target=' target="loncapaclient" ';
971: }
1.349 foxr 972: my $linkopen = "<a $target href=\"$link\">";
1.135 bowersj2 973: my $linkclose = "</a>";
974:
975: if ($resource->is_problem() &&
976: !$firstDisplayed) {
1.224 bowersj2 977:
978: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 979: my $alt = $iconAltTags{$icon};
980: if ($icon) {
1.298 albertel 981: my $location=
982: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1.392 albertel 983: $result .= "<td valign='middle' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";
1.135 bowersj2 984: } else {
985: $result .= "<td width='30'> </td>\n";
986: }
987: } else { # not problem, no icon
988: $result .= "<td width='30'> </td>\n";
989: }
990:
991: return $result;
1.133 bowersj2 992: }
993: sub render_long_status {
994: my ($resource, $part, $params) = @_;
1.392 albertel 995: my $result = "<td align='right' valign='middle'>\n";
1.136 bowersj2 996: my $firstDisplayed = !$params->{'condensed'} &&
997: $params->{'multipart'} && $part eq "0";
998:
999: my $color;
1.402 albertel 1000: if ($resource->is_problem() || $resource->is_practice()) {
1.136 bowersj2 1001: $color = $colormap{$resource->status};
1002:
1.252 matthew 1003: if (dueInLessThan24Hours($resource, $part) ||
1.136 bowersj2 1004: lastTry($resource, $part)) {
1005: $color = $hurryUpColor;
1006: }
1007: }
1008:
1009: if ($resource->kind() eq "res" &&
1.402 albertel 1010: ($resource->is_problem() || $resource->is_practice()) &&
1.136 bowersj2 1011: !$firstDisplayed) {
1012: if ($color) {$result .= "<font color=\"$color\"><b>"; }
1013: $result .= getDescription($resource, $part);
1014: if ($color) {$result .= "</b></font>"; }
1015: }
1.402 albertel 1016: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1.400 albertel 1017: $result .= &mt('(randomly select [_1])', $resource->randompick());
1018: }
1019: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1020: $result .= &mt('(randomly ordered)');
1.136 bowersj2 1021: }
1.210 bowersj2 1022:
1.213 bowersj2 1023: # Debugging code
1024: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1025: # ' - Part: ' . $part;
1026:
1.210 bowersj2 1027: $result .= "</td>\n";
1.136 bowersj2 1028:
1029: return $result;
1.51 bowersj2 1030: }
1031:
1.227 bowersj2 1032: # Colors obtained by taking the icons, matching the colors, and
1033: # possibly reducing the Value (HSV) of the color, if it's too bright
1034: # for text, generally by one third or so.
1.225 bowersj2 1035: my %statusColors =
1036: (
1037: $resObj->CLOSED => '#000000',
1.227 bowersj2 1038: $resObj->OPEN => '#998b13',
1039: $resObj->CORRECT => '#26933f',
1040: $resObj->INCORRECT => '#c48207',
1041: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1042: $resObj->ERROR => '#000000'
1043: );
1044: my %statusStrings =
1045: (
1046: $resObj->CLOSED => 'Not yet open',
1047: $resObj->OPEN => 'Open',
1048: $resObj->CORRECT => 'Correct',
1049: $resObj->INCORRECT => 'Incorrect',
1050: $resObj->ATTEMPTED => 'Attempted',
1051: $resObj->ERROR => 'Network Error'
1052: );
1053: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1054:
1055: sub render_parts_summary_status {
1056: my ($resource, $part, $params) = @_;
1.256 albertel 1057: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1058: if ($params->{showParts}) {
1059: return '<td></td>';
1060: }
1061:
1062: my $td = "<td align='right'>\n";
1063: my $endtd = "</td>\n";
1.256 albertel 1064: my @probs;
1.225 bowersj2 1065:
1.256 albertel 1066: if ($resource->contains_problem) {
1067: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1068: } else {
1069: @probs=($resource);
1070: }
1071: my $return;
1072: my %overallstatus;
1073: my $totalParts;
1074: foreach my $resource (@probs) {
1075: # If there is a single part, just show the simple status
1076: if ($resource->singlepart()) {
1077: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1078: $overallstatus{$status}++;
1079: $totalParts++;
1080: next;
1081: }
1082: # Now we can be sure the $part doesn't really matter.
1083: my $statusCount = $resource->simpleStatusCount();
1084: my @counts;
1085: foreach my $status (@statuses) {
1086: # decouple display order from the simpleStatusCount order
1087: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1088: if ($statusCount->[$slot]) {
1089: $overallstatus{$status}+=$statusCount->[$slot];
1090: $totalParts+=$statusCount->[$slot];
1091: }
1092: }
1093: }
1094: $return.= $td . $totalParts . ' parts: ';
1095: foreach my $status (@statuses) {
1096: if ($overallstatus{$status}) {
1097: $return.="<font color='" . $statusColors{$status} .
1098: "'>" . $overallstatus{$status} . ' '
1.225 bowersj2 1099: . $statusStrings{$status} . "</font>";
1100: }
1101: }
1.256 albertel 1102: $return.= $endtd;
1103: return $return;
1.225 bowersj2 1104: }
1105:
1.133 bowersj2 1106: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1107: \&render_quick_status, \&render_long_status,
1108: \&render_parts_summary_status);
1.132 bowersj2 1109:
1110: sub setDefault {
1111: my ($val, $default) = @_;
1112: if (!defined($val)) { return $default; }
1113: return $val;
1114: }
1115:
1.296 albertel 1116: sub cmp_title {
1117: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1118: $atitle=~s/^\s*//;
1119: $btitle=~s/^\s*//;
1120: return $atitle cmp $btitle;
1121: }
1122:
1.132 bowersj2 1123: sub render {
1124: my $args = shift;
1.140 bowersj2 1125: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1126: my $result = '';
1.132 bowersj2 1127: # Configure the renderer.
1128: my $cols = $args->{'cols'};
1129: if (!defined($cols)) {
1130: # no columns, no nav maps.
1131: return '';
1132: }
1.140 bowersj2 1133: my $navmap;
1134: if (defined($args->{'navmap'})) {
1135: $navmap = $args->{'navmap'};
1136: }
1137:
1.158 bowersj2 1138: my $r = $args->{'r'};
1.140 bowersj2 1139: my $queryString = $args->{'queryString'};
1.159 bowersj2 1140: my $jump = $args->{'jump'};
1.158 bowersj2 1141: my $here = $args->{'here'};
1.153 bowersj2 1142: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1143: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1144: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1145: # before the current resource when using #current
1146:
1147: # If we were passed 'here' information, we are not rendering
1148: # after a folder manipulation, and we were not passed an
1149: # iterator, make sure we open the folders to show the "here"
1150: # marker
1151: my $filterHash = {};
1152: # Figure out what we're not displaying
1.394 raeburn 1153: foreach my $item (split(/\,/, $env{"form.filter"})) {
1154: if ($item) {
1155: $filterHash->{$item} = "1";
1.140 bowersj2 1156: }
1157: }
1158:
1.191 bowersj2 1159: # Filter: Remember filter function and add our own filter: Refuse
1160: # to show hidden resources unless the user can see them.
1161: my $userCanSeeHidden = advancedUser();
1162: my $filterFunc = setDefault($args->{'filterFunc'},
1163: sub {return 1;});
1164: if (!$userCanSeeHidden) {
1165: # Without renaming the filterfunc, the server seems to go into
1166: # an infinite loop
1167: my $oldFilterFunc = $filterFunc;
1168: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1169: &$oldFilterFunc($res);};
1170: }
1171:
1.140 bowersj2 1172: my $condition = 0;
1.320 albertel 1173: if ($env{'form.condition'}) {
1.140 bowersj2 1174: $condition = 1;
1175: }
1176:
1.320 albertel 1177: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1.140 bowersj2 1178: # Step 1: Check to see if we have a navmap
1179: if (!defined($navmap)) {
1.221 bowersj2 1180: $navmap = Apache::lonnavmaps::navmap->new();
1.340 albertel 1181: if (!defined($navmap)) {
1182: # no londer in course
1.388 albertel 1183: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1.362 www 1184: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1.340 albertel 1185: }
1186: }
1.140 bowersj2 1187:
1188: # Step two: Locate what kind of here marker is necessary
1189: # Determine where the "here" marker is and where the screen jumps to.
1190:
1.332 albertel 1191: if ($env{'form.postsymb'} ne '') {
1.320 albertel 1192: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1.332 albertel 1193: } elsif ($env{'form.postdata'} ne '') {
1.140 bowersj2 1194: # couldn't find a symb, is there a URL?
1.320 albertel 1195: my $currenturl = $env{'form.postdata'};
1.158 bowersj2 1196: #$currenturl=~s/^http\:\/\///;
1197: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1198:
1.158 bowersj2 1199: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.331 albertel 1200: }
1201: if ($here eq '') {
1.317 albertel 1202: my $last;
1.320 albertel 1203: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1.317 albertel 1204: &GDBM_READER(),0640)) {
1205: $last=$hash{'last_known'};
1206: untie(%hash);
1207: }
1208: if ($last) { $here = $jump = $last; }
1209: }
1.158 bowersj2 1210:
1.140 bowersj2 1211: # Step three: Ensure the folders are open
1212: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1213: my $curRes;
1.140 bowersj2 1214: my $found = 0;
1215:
1216: # We only need to do this if we need to open the maps to show the
1217: # current position. This will change the counter so we can't count
1218: # for the jump marker with this loop.
1.294 albertel 1219: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1220: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1221: my $mapStack = $mapIterator->getStack();
1222:
1223: # Ensure the parent maps are open
1224: for my $map (@{$mapStack}) {
1225: if ($condition) {
1226: undef $filterHash->{$map->map_pc()};
1227: } else {
1228: $filterHash->{$map->map_pc()} = 1;
1229: }
1230: }
1231: $found = 1;
1232: }
1233: }
1.159 bowersj2 1234: }
1.140 bowersj2 1235:
1.320 albertel 1236: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1.140 bowersj2 1237: # If this is a click on a folder or something, we want to preserve the "here"
1238: # from the querystring, and get the new "jump" marker
1.320 albertel 1239: $here = $env{'form.here'};
1240: $jump = $env{'form.jump'};
1.140 bowersj2 1241: }
1242:
1.132 bowersj2 1243: my $it = $args->{'iterator'};
1244: if (!defined($it)) {
1.320 albertel 1245: # Construct a default iterator based on $env{'form.'} information
1.140 bowersj2 1246:
1247: # Step 1: Check to see if we have a navmap
1248: if (!defined($navmap)) {
1.221 bowersj2 1249: $navmap = Apache::lonnavmaps::navmap->new();
1.140 bowersj2 1250: }
1251:
1.144 bowersj2 1252: # See if we're being passed a specific map
1253: if ($args->{'iterator_map'}) {
1254: my $map = $args->{'iterator_map'};
1.145 bowersj2 1255: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1256: my $firstResource = $map->map_start();
1257: my $finishResource = $map->map_finish();
1258:
1259: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1260: } else {
1.401 albertel 1261: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1.144 bowersj2 1262: }
1.132 bowersj2 1263: }
1.256 albertel 1264:
1.159 bowersj2 1265: # (re-)Locate the jump point, if any
1.191 bowersj2 1266: # Note this does not take filtering or hidden into account... need
1267: # to be fixed?
1.159 bowersj2 1268: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1269: my $curRes;
1.159 bowersj2 1270: my $foundJump = 0;
1271: my $counter = 0;
1272:
1.222 bowersj2 1273: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1274: if (ref($curRes)) { $counter++; }
1275:
1276: if (ref($curRes) && $jump eq $curRes->symb()) {
1277:
1278: # This is why we have to use the main iterator instead of the
1279: # potentially faster DFS: The count has to be the same, so
1280: # the order has to be the same, which DFS won't give us.
1281: $args->{'currentJumpIndex'} = $counter;
1282: $foundJump = 1;
1283: }
1284: }
1285:
1.132 bowersj2 1286: my $showParts = setDefault($args->{'showParts'}, 1);
1287: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1288: # keeps track of when the current resource is found,
1289: # so we can back up a few and put the anchor above the
1290: # current resource
1.140 bowersj2 1291: my $printKey = $args->{'printKey'};
1292: my $printCloseAll = $args->{'printCloseAll'};
1293: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.298 albertel 1294:
1.140 bowersj2 1295: # Print key?
1296: if ($printKey) {
1297: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1298: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1.298 albertel 1299: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.140 bowersj2 1300: if ($navmap->{LAST_CHECK}) {
1301: $result .=
1.298 albertel 1302: '<img src="'.$location.'/chat.gif"> '.&mt('New discussion since').' '.
1.140 bowersj2 1303: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1304: '</td><td align="center" valign="bottom"> '.
1.298 albertel 1305: '<img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1306: '</td>';
1307: } else {
1308: $result .= '<td align="center" valign="bottom"> '.
1.298 albertel 1309: '<img src="'.$location.'/chat.gif"> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1310: ' <img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').
1.140 bowersj2 1311: '</td>';
1312: }
1313:
1314: $result .= '</tr></table>';
1315: }
1316:
1.172 bowersj2 1317: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1318: my ($link,$text);
1.140 bowersj2 1319: if ($condition) {
1.392 albertel 1320: $link='"navmaps?condition=0&filter=&'.$queryString.
1.384 www 1321: '&here='.&escape($here).'"';
1.377 www 1322: $text='Close all folders';
1.140 bowersj2 1323: } else {
1.392 albertel 1324: $link='"navmaps?condition=1&filter=&'.$queryString.
1.384 www 1325: '&here='.&escape($here).'"';
1.377 www 1326: $text='Open all folders';
1.281 albertel 1327: }
1328: if ($args->{'caller'} eq 'navmapsdisplay') {
1329: &add_linkitem($args->{'linkitems'},'changefolder',
1330: 'location.href='.$link,$text);
1331: } else {
1332: $result.='<a href='.$link.'>'.&mt($text).'</a>';
1333: }
1.266 raeburn 1334: $result .= "\n";
1335: }
1.140 bowersj2 1336:
1.266 raeburn 1337: # Check for any unread discussions in all resources.
1.281 albertel 1338: if ($args->{'caller'} eq 'navmapsdisplay') {
1.296 albertel 1339: &add_linkitem($args->{'linkitems'},'clearbubbles',
1340: 'document.clearbubbles.submit()',
1341: 'Mark all posts read');
1.297 albertel 1342: my $time=time;
1.296 albertel 1343: $result .= (<<END);
1344: <form name="clearbubbles" method="post" action="/adm/feedback">
1345: <input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
1.297 albertel 1346: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1347: END
1348: if ($args->{'sort'} eq 'discussion') {
1349: my $totdisc = 0;
1350: my $haveDisc = '';
1351: my @allres=$navmap->retrieveResources();
1352: foreach my $resource (@allres) {
1353: if ($resource->hasDiscussion()) {
1.323 albertel 1354: $haveDisc .= $resource->wrap_symb().':';
1.296 albertel 1355: $totdisc ++;
1.267 albertel 1356: }
1357: }
1.296 albertel 1358: if ($totdisc > 0) {
1359: $haveDisc =~ s/:$//;
1360: $result .= (<<END);
1361: <input type="hidden" name="navmaps" value="$haveDisc" />
1362: </form>
1363: END
1364: }
1.297 albertel 1365: }
1366: $result.='</form>';
1.266 raeburn 1367: }
1.276 albertel 1368:
1.281 albertel 1369: if ($args->{'caller'} eq 'navmapsdisplay') {
1.283 raeburn 1370: $result .= '<table><tr><td>'.
1.388 albertel 1371: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',undef,'RAT').'</td>';
1.320 albertel 1372: if ($env{'environment.remotenavmap'} ne 'on') {
1.283 raeburn 1373: $result .= '<td> </td>';
1374: } else {
1375: $result .= '</tr><tr>';
1376: }
1.281 albertel 1377: $result.=&show_linkitems($args->{'linkitems'});
1378: if ($args->{'sort_html'}) {
1.320 albertel 1379: if ($env{'environment.remotenavmap'} ne 'on') {
1.281 albertel 1380: $result.='<td> </td><td> </td><td> </td>'.
1381: '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
1382: } else {
1383: $result.='</tr><tr><td align="left"><br />'.
1384: $args->{'sort_html'}.'</td></tr>';
1385: }
1386: }
1387: $result .= '</table>';
1388: } elsif ($args->{'sort_html'}) {
1389: $result.=$args->{'sort_html'};
1390: }
1.276 albertel 1391:
1.266 raeburn 1392: $result .= "<br />\n";
1.140 bowersj2 1393: if ($r) {
1394: $r->print($result);
1395: $r->rflush();
1396: $result = "";
1397: }
1.132 bowersj2 1398: # End parameter setting
1.133 bowersj2 1399:
1.132 bowersj2 1400: # Data
1.140 bowersj2 1401: $result .= '<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n";
1.132 bowersj2 1402: my $res = "Apache::lonnavmaps::resource";
1403: my %condenseStatuses =
1404: ( $res->NETWORK_FAILURE => 1,
1405: $res->NOTHING_SET => 1,
1406: $res->CORRECT => 1 );
1407: my @backgroundColors = ("#FFFFFF", "#F6F6F6");
1.133 bowersj2 1408:
1409: # Shared variables
1410: $args->{'counter'} = 0; # counts the rows
1411: $args->{'indentLevel'} = 0;
1412: $args->{'isNewBranch'} = 0;
1413: $args->{'condensed'} = 0;
1.298 albertel 1414: my $location=
1415: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace1.gif");
1.329 albertel 1416: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' width='25' height='1' alt=' ' border='0' />");
1.133 bowersj2 1417: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1418:
1.190 bowersj2 1419: # If we're suppressing empty sequences, look for them here. Use DFS for speed,
1420: # since structure actually doesn't matter, except what map has what resources.
1421: if ($args->{'suppressEmptySequences'}) {
1422: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1423: $it->{FIRST_RESOURCE},
1424: $it->{FINISH_RESOURCE},
1425: {}, undef, 1);
1.222 bowersj2 1426: my $depth = 0;
1.190 bowersj2 1427: $dfsit->next();
1428: my $curRes = $dfsit->next();
1429: while ($depth > -1) {
1430: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1431: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1432:
1433: if (ref($curRes)) {
1434: # Parallel pre-processing: Do sequences have non-filtered-out children?
1.201 bowersj2 1435: if ($curRes->is_map()) {
1.190 bowersj2 1436: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1437: # Sequences themselves do not count as visible children,
1438: # unless those sequences also have visible children.
1439: # This means if a sequence appears, there's a "promise"
1440: # that there's something under it if you open it, somewhere.
1441: } else {
1442: # Not a sequence: if it's filtered, ignore it, otherwise
1443: # rise up the stack and mark the sequences as having children
1444: if (&$filterFunc($curRes)) {
1445: for my $sequence (@{$dfsit->getStack()}) {
1446: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1447: }
1448: }
1449: }
1450: }
1451: } continue {
1452: $curRes = $dfsit->next();
1453: }
1454: }
1455:
1.133 bowersj2 1456: my $displayedJumpMarker = 0;
1.132 bowersj2 1457: # Set up iteration.
1458: my $now = time();
1459: my $in24Hours = $now + 24 * 60 * 60;
1460: my $rownum = 0;
1461:
1.141 bowersj2 1462: # export "here" marker information
1463: $args->{'here'} = $here;
1464:
1.222 bowersj2 1465: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1466: my @resources;
1467: my $code='';# sub { !(shift->is_map();) };
1468: if ($args->{'sort'} eq 'title') {
1.276 albertel 1469: my $oldFilterFunc = $filterFunc;
1470: my $filterFunc=
1471: sub {
1472: my ($res)=@_;
1473: if ($res->is_map()) { return 0;}
1474: return &$oldFilterFunc($res);
1475: };
1476: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1477: @resources= sort { &cmp_title($a,$b) } @resources;
1478: } elsif ($args->{'sort'} eq 'duedate') {
1479: my $oldFilterFunc = $filterFunc;
1480: my $filterFunc=
1481: sub {
1482: my ($res)=@_;
1483: if (!$res->is_problem()) { return 0;}
1484: return &$oldFilterFunc($res);
1485: };
1486: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1487: @resources= sort {
1.270 albertel 1488: if ($a->duedate ne $b->duedate) {
1489: return $a->duedate cmp $b->duedate;
1490: }
1.296 albertel 1491: my $value=&cmp_title($a,$b);
1492: return $value;
1.270 albertel 1493: } @resources;
1.296 albertel 1494: } elsif ($args->{'sort'} eq 'discussion') {
1495: my $oldFilterFunc = $filterFunc;
1496: my $filterFunc=
1497: sub {
1498: my ($res)=@_;
1499: if (!$res->hasDiscussion() &&
1500: !$res->getFeedback() &&
1501: !$res->getErrors()) { return 0;}
1502: return &$oldFilterFunc($res);
1503: };
1504: @resources=$navmap->retrieveResources(undef,$filterFunc);
1505: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1506: } else {
1507: #unknow sort mechanism or default
1508: undef($args->{'sort'});
1.270 albertel 1509: }
1510:
1.276 albertel 1511:
1.270 albertel 1512: while (1) {
1513: if ($args->{'sort'}) {
1514: $curRes = shift(@resources);
1515: } else {
1516: $curRes = $it->next($closeAllPages);
1517: }
1518: if (!$curRes) { last; }
1519:
1.132 bowersj2 1520: # Maintain indentation level.
1521: if ($curRes == $it->BEGIN_MAP() ||
1522: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1523: $args->{'indentLevel'}++;
1.132 bowersj2 1524: }
1525: if ($curRes == $it->END_MAP() ||
1526: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1527: $args->{'indentLevel'}--;
1.132 bowersj2 1528: }
1529: # Notice new branches
1530: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1531: $args->{'isNewBranch'} = 1;
1532: }
1533:
1534: # If this isn't an actual resource, continue on
1535: if (!ref($curRes)) {
1536: next;
1.132 bowersj2 1537: }
1.133 bowersj2 1538:
1.143 bowersj2 1539: # If this has been filtered out, continue on
1540: if (!(&$filterFunc($curRes))) {
1541: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1542: next;
1543: }
1.132 bowersj2 1544:
1.190 bowersj2 1545: # If this is an empty sequence and we're filtering them, continue on
1.201 bowersj2 1546: if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&
1.190 bowersj2 1547: !$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {
1548: next;
1549: }
1550:
1.153 bowersj2 1551: # If we're suppressing navmaps and this is a navmap, continue on
1552: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1553: next;
1554: }
1555:
1.191 bowersj2 1556: $args->{'counter'}++;
1557:
1.132 bowersj2 1558: # Does it have multiple parts?
1.133 bowersj2 1559: $args->{'multipart'} = 0;
1560: $args->{'condensed'} = 0;
1.132 bowersj2 1561: my @parts;
1562:
1563: # Decide what parts to show.
1.133 bowersj2 1564: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1565: @parts = @{$curRes->parts()};
1.192 bowersj2 1566: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1567:
1568: if ($condenseParts) { # do the condensation
1.133 bowersj2 1569: if (!$args->{'condensed'}) {
1.132 bowersj2 1570: # Decide whether to condense based on similarity
1.192 bowersj2 1571: my $status = $curRes->status($parts[0]);
1572: my $due = $curRes->duedate($parts[0]);
1573: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1574: my $statusAllSame = 1;
1575: my $dueAllSame = 1;
1576: my $openAllSame = 1;
1.192 bowersj2 1577: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1578: if ($curRes->status($parts[$i]) != $status){
1579: $statusAllSame = 0;
1580: }
1581: if ($curRes->duedate($parts[$i]) != $due ) {
1582: $dueAllSame = 0;
1583: }
1584: if ($curRes->opendate($parts[$i]) != $open) {
1585: $openAllSame = 0;
1586: }
1587: }
1588: # $*allSame is true if all the statuses were
1589: # the same. Now, if they are all the same and
1590: # match one of the statuses to condense, or they
1591: # are all open with the same due date, or they are
1592: # all OPEN_LATER with the same open date, display the
1593: # status of the first non-zero part (to get the 'correct'
1594: # status right, since 0 is never 'correct' or 'open').
1595: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1596: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1597: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1598: @parts = ($parts[0]);
1.133 bowersj2 1599: $args->{'condensed'} = 1;
1.132 bowersj2 1600: }
1601: }
1.198 bowersj2 1602: # Multipart problem with one part: always "condense" (happens
1603: # to match the desirable behavior)
1604: if ($curRes->countParts() == 1) {
1605: @parts = ($parts[0]);
1606: $args->{'condensed'} = 1;
1607: }
1.132 bowersj2 1608: }
1.157 bowersj2 1609: }
1.132 bowersj2 1610:
1611: # If the multipart problem was condensed, "forget" it was multipart
1612: if (scalar(@parts) == 1) {
1.133 bowersj2 1613: $args->{'multipart'} = 0;
1.192 bowersj2 1614: } else {
1615: # Add part 0 so we display it correctly.
1616: unshift @parts, '0';
1.132 bowersj2 1617: }
1.310 albertel 1618:
1619: {
1620: my ($src,$symb,$anchor,$stack);
1621: if ($args->{'sort'}) {
1622: my $it = $navmap->getIterator(undef, undef, undef, 1);
1623: while ( my $res=$it->next()) {
1624: if (ref($res) &&
1625: $res->symb() eq $curRes->symb()) { last; }
1626: }
1627: $stack=$it->getStack();
1628: } else {
1629: $stack=$it->getStack();
1630: }
1631: ($src,$symb,$anchor)=getLinkForResource($stack);
1632: if (defined($anchor)) { $anchor='#'.$anchor; }
1633: my $srcHasQuestion = $src =~ /\?/;
1634: $args->{"resourceLink"} = $src.
1635: ($srcHasQuestion?'&':'?') .
1.384 www 1636: 'symb=' . &escape($symb).$anchor;
1.310 albertel 1637: }
1.132 bowersj2 1638: # Now, we've decided what parts to show. Loop through them and
1639: # show them.
1.192 bowersj2 1640: foreach my $part (@parts) {
1.132 bowersj2 1641: $rownum ++;
1642: my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];
1643:
1644: $result .= " <tr bgcolor='$backgroundColor'>\n";
1.134 bowersj2 1645:
1646: # Set up some data about the parts that the cols might want
1647: my $filter = $it->{FILTER};
1.270 albertel 1648:
1.132 bowersj2 1649: # Now, display each column.
1650: foreach my $col (@$cols) {
1.139 bowersj2 1651: my $colHTML = '';
1652: if (ref($col)) {
1653: $colHTML .= &$col($curRes, $part, $args);
1654: } else {
1655: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1656: }
1.132 bowersj2 1657:
1.133 bowersj2 1658: # If this is the first column and it's time to print
1659: # the anchor, do so
1660: if ($col == $cols->[0] &&
1661: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1662: $currentJumpDelta) {
1663: # Jam the anchor after the <td> tag;
1664: # necessary for valid HTML (which Mozilla requires)
1665: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1666: $displayedJumpMarker = 1;
1667: }
1.139 bowersj2 1668: $result .= $colHTML . "\n";
1.132 bowersj2 1669: }
1.139 bowersj2 1670: $result .= " </tr>\n";
1.140 bowersj2 1671: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1672: }
1.153 bowersj2 1673:
1.139 bowersj2 1674: if ($r && $rownum % 20 == 0) {
1675: $r->print($result);
1676: $result = "";
1677: $r->rflush();
1.132 bowersj2 1678: }
1.156 bowersj2 1679: } continue {
1.208 bowersj2 1680: if ($r) {
1681: # If we have the connection, make sure the user is still connected
1682: my $c = $r->connection;
1683: if ($c->aborted()) {
1684: # Who cares what we do, nobody will see it anyhow.
1685: return '';
1686: }
1687: }
1.132 bowersj2 1688: }
1689:
1.134 bowersj2 1690: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1691: # delay needed because the browser is processing the jump before
1692: # it finishes rendering, so it goes to the wrong place!
1693: # onload might be better, but this routine has no access to that.
1694: # On mozilla, the 0-millisecond timeout seems to prevent this;
1695: # it's quite likely this might fix other browsers, too, and
1696: # certainly won't hurt anything.
1.139 bowersj2 1697: if ($displayedJumpMarker) {
1.247 albertel 1698: $result .= "
1699: <script>
1700: if (location.href.indexOf('#curloc')==-1) {
1701: setTimeout(\"location += '#curloc';\", 0)
1702: }
1703: </script>";
1.134 bowersj2 1704: }
1705:
1.132 bowersj2 1706: $result .= "</table>";
1.140 bowersj2 1707:
1708: if ($r) {
1709: $r->print($result);
1710: $result = "";
1711: $r->rflush();
1712: }
1713:
1.132 bowersj2 1714: return $result;
1715: }
1716:
1.281 albertel 1717: sub add_linkitem {
1718: my ($linkitems,$name,$cmd,$text)=@_;
1719: $$linkitems{$name}{'cmd'}=$cmd;
1720: $$linkitems{$name}{'text'}=&mt($text);
1721: }
1722:
1723: sub show_linkitems {
1724: my ($linkitems)=@_;
1.312 albertel 1725: my @linkorder = ("blank","launchnav","closenav","firsthomework",
1726: "everything","uncompleted","changefolder","clearbubbles");
1.281 albertel 1727:
1728: my $result .= (<<ENDBLOCK);
1.283 raeburn 1729: <td align="left">
1.281 albertel 1730: <script type="text/javascript">
1731: function changeNavDisplay () {
1732: var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
1733: ENDBLOCK
1734: foreach my $link (@linkorder) {
1735: $result.= "if (navchoice == '$link') {".
1736: $linkitems->{$link}{'cmd'}."}\n";
1737: }
1738: $result.='}
1739: </script>
1740: <form name="linkitems" method="post">
1741: <nobr><select name="toplink">'."\n";
1742: foreach my $link (@linkorder) {
1743: if (defined($linkitems->{$link})) {
1744: if ($linkitems->{$link}{'text'} ne '') {
1745: $result .= ' <option value="'.$link.'">'.
1746: $linkitems->{$link}{'text'}."</option>\n";
1747: }
1748: }
1749: }
1750: $result .= '</select> <input type="button" name="chgnav"
1751: value="Go" onClick="javascript:changeNavDisplay()" />
1752: </nobr></form></td>'."\n";
1.298 albertel 1753:
1.281 albertel 1754: return $result;
1755: }
1756:
1.133 bowersj2 1757: 1;
1758:
1759: package Apache::lonnavmaps::navmap;
1760:
1761: =pod
1762:
1.216 bowersj2 1763: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 1764:
1.217 bowersj2 1765: =head2 Overview
1.133 bowersj2 1766:
1.217 bowersj2 1767: The navmap object's job is to provide access to the resources
1768: in the course as Apache::lonnavmaps::resource objects, and to
1769: query and manage the relationship between those resource objects.
1770:
1771: Generally, you'll use the navmap object in one of three basic ways.
1772: In order of increasing complexity and power:
1773:
1774: =over 4
1775:
1.358 albertel 1776: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
1.217 bowersj2 1777: various ways to obtain resource objects, based on various identifiers.
1778: Use this when you want to request information about one object or
1779: a handful of resources you already know the identities of, from some
1780: other source. For more about Ids, Symbs, and MapPcs, see the
1781: Resource documentation. Note that Url should be a B<last resort>,
1.358 albertel 1782: not your first choice; it only really works when there is only one
1.217 bowersj2 1783: instance of the resource in the course, which only applies to
1.358 albertel 1784: maps, and even that may change in the future (see the B<getResourceByUrl>
1785: documentation for more details.)
1.217 bowersj2 1786:
1787: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
1788: retrieves resources matching some criterion and returns them
1789: in a flat array, with no structure information. Use this when
1790: you are manipulating a series of resources, based on what map
1791: the are in, but do not care about branching, or exactly how
1792: the maps and resources are related. This is the most common case.
1793:
1794: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
1795: the course's navmap in various ways without writing the traversal
1796: code yourself. See iterator documentation below. Use this when
1797: you need to know absolutely everything about the course, including
1798: branches and the precise relationship between maps and resources.
1799:
1800: =back
1801:
1802: =head2 Creation And Destruction
1803:
1804: To create a navmap object, use the following function:
1.133 bowersj2 1805:
1806: =over 4
1807:
1.221 bowersj2 1808: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 1809:
1.221 bowersj2 1810: Creates a new navmap object. Returns the navmap object if this is
1811: successful, or B<undef> if not.
1.174 albertel 1812:
1.216 bowersj2 1813: =back
1814:
1815: =head2 Methods
1816:
1817: =over 4
1818:
1.174 albertel 1819: =item * B<getIterator>(first, finish, filter, condition):
1820:
1821: See iterator documentation below.
1.133 bowersj2 1822:
1823: =cut
1824:
1825: use strict;
1826: use GDBM_File;
1.320 albertel 1827: use Apache::lonnet;
1.397 albertel 1828: use LONCAPA;
1.133 bowersj2 1829:
1830: sub new {
1831: # magic invocation to create a class instance
1832: my $proto = shift;
1833: my $class = ref($proto) || $proto;
1834: my $self = {};
1835:
1836: # Resource cache stores navmap resources as we reference them. We generate
1837: # them on-demand so we don't pay for creating resources unless we use them.
1838: $self->{RESOURCE_CACHE} = {};
1839:
1840: # Network failure flag, if we accessed the course or user opt and
1841: # failed
1842: $self->{NETWORK_FAILURE} = 0;
1843:
1844: # tie the nav hash
1845:
1.168 bowersj2 1846: my %navmaphash;
1847: my %parmhash;
1.320 albertel 1848: my $courseFn = $env{"request.course.fn"};
1.220 bowersj2 1849: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
1.133 bowersj2 1850: &GDBM_READER(), 0640))) {
1851: return undef;
1852: }
1853:
1.220 bowersj2 1854: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
1.133 bowersj2 1855: &GDBM_READER(), 0640)))
1856: {
1.170 matthew 1857: untie %{$self->{PARM_HASH}};
1.133 bowersj2 1858: return undef;
1859: }
1860:
1.199 bowersj2 1861: $self->{NAV_HASH} = \%navmaphash;
1.168 bowersj2 1862: $self->{PARM_HASH} = \%parmhash;
1.221 bowersj2 1863: $self->{PARM_CACHE} = {};
1.133 bowersj2 1864:
1865: bless($self);
1866:
1867: return $self;
1868: }
1869:
1.221 bowersj2 1870: sub generate_course_user_opt {
1.133 bowersj2 1871: my $self = shift;
1.221 bowersj2 1872: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 1873:
1.320 albertel 1874: my $uname=$env{'user.name'};
1875: my $udom=$env{'user.domain'};
1876: my $cid=$env{'request.course.id'};
1.326 albertel 1877: my $cdom=$env{'course.'.$cid.'.domain'};
1878: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 1879:
1.133 bowersj2 1880: # ------------------------------------------------- Get coursedata (if present)
1.326 albertel 1881: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
1882: # Check for network failure
1883: if (!ref($courseopt)) {
1884: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
1.324 albertel 1885: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 1886: }
1.326 albertel 1887: undef($courseopt);
1888: }
1.325 albertel 1889:
1.133 bowersj2 1890: # --------------------------------------------------- Get userdata (if present)
1.325 albertel 1891:
1.326 albertel 1892: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
1893: # Check for network failure
1894: if (!ref($useropt)) {
1895: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
1.324 albertel 1896: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 1897: }
1.326 albertel 1898: undef($useropt);
1.221 bowersj2 1899: }
1900:
1.326 albertel 1901: $self->{COURSE_OPT} = $courseopt;
1902: $self->{USER_OPT} = $useropt;
1903:
1.221 bowersj2 1904: $self->{COURSE_USER_OPT_GENERATED} = 1;
1905:
1906: return;
1907: }
1908:
1909: sub generate_email_discuss_status {
1910: my $self = shift;
1.259 raeburn 1911: my $symb = shift;
1.221 bowersj2 1912: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 1913:
1.320 albertel 1914: my $cid=$env{'request.course.id'};
1.326 albertel 1915: my $cdom=$env{'course.'.$cid.'.domain'};
1916: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 1917:
1918: my %emailstatus = &Apache::lonnet::dump('email_status');
1919: my $logoutTime = $emailstatus{'logout'};
1.320 albertel 1920: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
1.221 bowersj2 1921: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
1922: $courseLeaveTime : $logoutTime);
1923: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
1924: $cdom, $cnum);
1.259 raeburn 1925: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
1.320 albertel 1926: $env{'user.domain'},$env{'user.name'},'lastread');
1.259 raeburn 1927: my %lastreadtime = ();
1.394 raeburn 1928: foreach my $key (keys %lastread) {
1929: my $shortkey = $key;
1930: $shortkey =~ s/_lastread$//;
1931: $lastreadtime{$shortkey} = $lastread{$key};
1.259 raeburn 1932: }
1933:
1.221 bowersj2 1934: my %feedback=();
1935: my %error=();
1.325 albertel 1936: my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},
1937: $env{'user.name'});
1.221 bowersj2 1938:
1.325 albertel 1939: foreach my $msgid (@keys) {
1.295 albertel 1940: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
1.395 raeburn 1941: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
1942: $symb,$error) = &Apache::lonmsg::unpackmsgid($msgid);
1.396 raeburn 1943: &Apache::lonenc::check_decrypt(\$symb);
1944: if (($fromcid ne '') && ($fromcid ne $cid)) {
1945: next;
1946: }
1.395 raeburn 1947: if (defined($symb)) {
1948: if (defined($error) && $error == 1) {
1949: $error{$symb}.=','.$msgid;
1950: } else {
1951: $feedback{$symb}.=','.$msgid;
1952: }
1953: } else {
1954: my $plain=
1955: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
1956: if ($plain=~/ \[([^\]]+)\]\:/) {
1957: my $url=$1;
1958: if ($plain=~/\:Error \[/) {
1959: $error{$url}.=','.$msgid;
1960: } else {
1961: $feedback{$url}.=','.$msgid;
1962: }
1963: }
1964: }
1.221 bowersj2 1965: }
1.211 bowersj2 1966: }
1.221 bowersj2 1967:
1.395 raeburn 1968: #symbs of resources that have feedbacks (will be urls pre-2.3)
1.221 bowersj2 1969: $self->{FEEDBACK} = \%feedback;
1.395 raeburn 1970: #or errors (will be urls pre 2.3)
1.295 albertel 1971: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 1972: $self->{DISCUSSION_TIME} = \%discussiontime;
1973: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 1974: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 1975:
1976: $self->{EMAIL_DISCUSS_GENERATED} = 1;
1977: }
1978:
1979: sub get_user_data {
1980: my $self = shift;
1981: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 1982:
1.221 bowersj2 1983: # Retrieve performance data on problems
1.320 albertel 1984: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
1985: $env{'user.domain'},
1986: $env{'user.name'});
1.221 bowersj2 1987: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 1988:
1.221 bowersj2 1989: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 1990: }
1991:
1.354 raeburn 1992: sub get_discussion_data {
1993: my $self = shift;
1994: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
1.366 albertel 1995: return $self->{DISCUSSION_DATA};
1.354 raeburn 1996: }
1.366 albertel 1997:
1998: $self->generate_email_discuss_status();
1999:
1.354 raeburn 2000: my $cid=$env{'request.course.id'};
2001: my $cdom=$env{'course.'.$cid.'.domain'};
2002: my $cnum=$env{'course.'.$cid.'.num'};
2003: # Retrieve discussion data for resources in course
1.367 albertel 2004: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
1.366 albertel 2005:
2006:
1.354 raeburn 2007: $self->{DISCUSSION_DATA} = \%discussion_data;
2008: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2009: return $self->{DISCUSSION_DATA};
2010: }
2011:
2012:
1.133 bowersj2 2013: # Internal function: Takes a key to look up in the nav hash and implements internal
2014: # memory caching of that key.
2015: sub navhash {
2016: my $self = shift; my $key = shift;
2017: return $self->{NAV_HASH}->{$key};
2018: }
2019:
1.217 bowersj2 2020: =pod
2021:
2022: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2023: false otherwise. Undefined course maps indicate an error somewhere in
2024: LON-CAPA, and you will not be able to proceed with using the navmap.
2025: See the B<NAV> screen for an example of using this.
2026:
2027: =cut
2028:
1.133 bowersj2 2029: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2030: sub courseMapDefined {
2031: my $self = shift;
1.320 albertel 2032: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
1.133 bowersj2 2033:
2034: my $firstres = $self->navhash("map_start_$uri");
2035: my $lastres = $self->navhash("map_finish_$uri");
2036: return $firstres && $lastres;
2037: }
2038:
2039: sub getIterator {
2040: my $self = shift;
2041: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.314 albertel 2042: shift, undef, shift,
2043: shift, shift);
1.133 bowersj2 2044: return $iterator;
2045: }
2046:
2047: # Private method: Does the given resource (as a symb string) have
2048: # current discussion? Returns 0 if chat/mail data not extracted.
2049: sub hasDiscussion {
2050: my $self = shift;
2051: my $symb = shift;
1.221 bowersj2 2052: $self->generate_email_discuss_status();
2053:
1.133 bowersj2 2054: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2055:
2056: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2057:
1.323 albertel 2058: # backward compatibility (bulletin boards used to be 'wrapped')
2059: my $ressymb = $self->wrap_symb($symb);
1.259 raeburn 2060: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2061: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2062: } else {
1.266 raeburn 2063: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2064: 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 2065: }
1.133 bowersj2 2066: }
2067:
1.366 albertel 2068: sub last_post_time {
2069: my $self = shift;
2070: my $symb = shift;
2071: my $ressymb = $self->wrap_symb($symb);
2072: return $self->{DISCUSSION_TIME}->{$ressymb};
2073: }
2074:
1.393 raeburn 2075: sub discussion_info {
1.366 albertel 2076: my $self = shift;
2077: my $symb = shift;
1.393 raeburn 2078: my $filter = shift;
1.366 albertel 2079:
2080: $self->get_discussion_data();
1.372 raeburn 2081:
1.366 albertel 2082: my $ressymb = $self->wrap_symb($symb);
1.372 raeburn 2083: # keys used to store bulletinboard postings use 'unwrapped' symb.
1.397 albertel 2084: my $discsymb = &escape($self->unwrap_symb($ressymb));
1.372 raeburn 2085: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
1.366 albertel 2086: if (!$version) { return; }
2087:
2088: my $prevread = $self->{LAST_READ}{$ressymb};
2089:
1.393 raeburn 2090: my $count = 0;
1.366 albertel 2091: my $hiddenflag = 0;
2092: my $deletedflag = 0;
1.393 raeburn 2093: my ($hidden,$deleted,%info);
1.366 albertel 2094:
2095: for (my $id=$version; $id>0; $id--) {
1.372 raeburn 2096: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
1.366 albertel 2097: my @keys=split(/:/,$vkeys);
2098: if (grep(/^hidden$/ ,@keys)) {
2099: if (!$hiddenflag) {
1.372 raeburn 2100: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
1.366 albertel 2101: $hiddenflag = 1;
2102: }
2103: } elsif (grep(/^deleted$/,@keys)) {
2104: if (!$deletedflag) {
1.372 raeburn 2105: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
1.366 albertel 2106: $deletedflag = 1;
2107: }
2108: } else {
1.393 raeburn 2109: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2110: if ($filter eq 'unread') {
2111: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2112: next;
2113: }
2114: }
2115: $count++;
2116: $info{$count}{'subject'} =
2117: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2118: $info{$count}{'id'} = $id;
2119: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2120: }
1.366 albertel 2121: }
2122: }
2123: if (wantarray) {
1.393 raeburn 2124: return ($count,%info);
1.366 albertel 2125: }
1.393 raeburn 2126: return $count;
1.366 albertel 2127: }
2128:
1.321 raeburn 2129: sub wrap_symb {
1.322 albertel 2130: my $self = shift;
1.321 raeburn 2131: my $symb = shift;
1.373 albertel 2132: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
1.322 albertel 2133: unless ($symb =~ m|adm/wrapper/adm|) {
2134: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
1.321 raeburn 2135: }
2136: }
1.322 albertel 2137: return $symb;
1.321 raeburn 2138: }
2139:
1.372 raeburn 2140: sub unwrap_symb {
2141: my $self = shift;
2142: my $ressymb = shift;
2143: my $discsymb = $ressymb;
1.373 albertel 2144: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
1.372 raeburn 2145: $discsymb = $1.$2;
2146: }
2147: return $discsymb;
2148: }
2149:
1.322 albertel 2150: # Private method: Does the given resource (as a symb string) have
2151: # current feedback? Returns the string in the feedback hash, which
2152: # will be false if it does not exist.
2153:
1.133 bowersj2 2154: sub getFeedback {
2155: my $self = shift;
2156: my $symb = shift;
1.395 raeburn 2157: my $source = shift;
1.133 bowersj2 2158:
1.221 bowersj2 2159: $self->generate_email_discuss_status();
2160:
1.133 bowersj2 2161: if (!defined($self->{FEEDBACK})) { return ""; }
2162:
1.395 raeburn 2163: my $feedback;
2164: if ($self->{FEEDBACK}->{$symb}) {
2165: $feedback = $self->{FEEDBACK}->{$symb};
2166: if ($self->{FEEDBACK}->{$source}) {
2167: $feedback .= ','.$self->{FEEDBACK}->{$source};
2168: }
2169: } else {
2170: if ($self->{FEEDBACK}->{$source}) {
2171: $feedback = $self->{FEEDBACK}->{$source};
2172: }
2173: }
2174: return $feedback;
1.133 bowersj2 2175: }
2176:
2177: # Private method: Get the errors for that resource (by source).
2178: sub getErrors {
2179: my $self = shift;
1.395 raeburn 2180: my $symb = shift;
1.133 bowersj2 2181: my $src = shift;
1.221 bowersj2 2182:
2183: $self->generate_email_discuss_status();
2184:
1.133 bowersj2 2185: if (!defined($self->{ERROR_MSG})) { return ""; }
1.395 raeburn 2186:
2187: my $errors;
2188: if ($self->{ERROR_MSG}->{$symb}) {
2189: $errors = $self->{ERROR_MSG}->{$symb};
2190: if ($self->{ERROR_MSG}->{$src}) {
2191: $errors .= ','.$self->{ERROR_MSG}->{$src};
2192: }
2193: } else {
2194: if ($self->{ERROR_MSG}->{$src}) {
2195: $errors = $self->{ERROR_MSG}->{$src};
2196: }
2197: }
2198: return $errors;
1.133 bowersj2 2199: }
2200:
2201: =pod
2202:
1.174 albertel 2203: =item * B<getById>(id):
2204:
2205: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2206: object for that resource. This method, or other methods that use it
2207: (as in the resource object) is the only proper way to obtain a
2208: resource object.
1.133 bowersj2 2209:
1.194 bowersj2 2210: =item * B<getBySymb>(symb):
2211:
2212: Based on the symb of the resource, get a resource object for that
2213: resource. This is one of the proper ways to get a resource object.
2214:
2215: =item * B<getMapByMapPc>(map_pc):
2216:
2217: Based on the map_pc of the resource, get a resource object for
2218: the given map. This is one of the proper ways to get a resource object.
2219:
1.133 bowersj2 2220: =cut
2221:
2222: # The strategy here is to cache the resource objects, and only construct them
2223: # as we use them. The real point is to prevent reading any more from the tied
1.398 banghart 2224: # hash than we have to, which should hopefully alleviate speed problems.
1.133 bowersj2 2225:
2226: sub getById {
2227: my $self = shift;
2228: my $id = shift;
2229:
2230: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2231: {
2232: return $self->{RESOURCE_CACHE}->{$id};
2233: }
2234:
2235: # resource handles inserting itself into cache.
2236: # Not clear why the quotes are necessary, but as of this
2237: # writing it doesn't work without them.
2238: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2239: }
1.133 bowersj2 2240:
1.172 bowersj2 2241: sub getBySymb {
2242: my $self = shift;
2243: my $symb = shift;
1.277 matthew 2244:
1.228 albertel 2245: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2246: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2247: my $returnvalue = undef;
2248: if (ref($map)) {
2249: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2250: }
2251: return $returnvalue;
1.194 bowersj2 2252: }
2253:
2254: sub getByMapPc {
2255: my $self = shift;
2256: my $map_pc = shift;
2257: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2258: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2259: return $self->getById($map_id);
1.172 bowersj2 2260: }
2261:
1.133 bowersj2 2262: =pod
2263:
1.174 albertel 2264: =item * B<firstResource>():
2265:
2266: Returns a resource object reference corresponding to the first
2267: resource in the navmap.
1.133 bowersj2 2268:
2269: =cut
2270:
2271: sub firstResource {
2272: my $self = shift;
2273: my $firstResource = $self->navhash('map_start_' .
1.320 albertel 2274: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2275: return $self->getById($firstResource);
1.132 bowersj2 2276: }
1.133 bowersj2 2277:
2278: =pod
2279:
1.174 albertel 2280: =item * B<finishResource>():
2281:
2282: Returns a resource object reference corresponding to the last resource
2283: in the navmap.
1.133 bowersj2 2284:
2285: =cut
2286:
2287: sub finishResource {
2288: my $self = shift;
2289: my $firstResource = $self->navhash('map_finish_' .
1.320 albertel 2290: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2291: return $self->getById($firstResource);
1.132 bowersj2 2292: }
1.133 bowersj2 2293:
2294: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2295: # the actual lookup; parmval caches the results.
2296: sub parmval {
2297: my $self = shift;
1.399 albertel 2298: my ($what,$symb,$recurse)=@_;
1.133 bowersj2 2299: my $hashkey = $what."|||".$symb;
2300:
2301: if (defined($self->{PARM_CACHE}->{$hashkey})) {
1.411 ! raeburn 2302: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
! 2303: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
! 2304: if (wantarray) {
! 2305: return @{$self->{PARM_CACHE}->{$hashkey}};
! 2306: } else {
! 2307: return $self->{PARM_CACHE}->{$hashkey}->[0];
! 2308: }
! 2309: }
! 2310: } else {
! 2311: return $self->{PARM_CACHE}->{$hashkey};
! 2312: }
1.133 bowersj2 2313: }
1.399 albertel 2314: my $result = $self->parmval_real($what, $symb, $recurse);
1.133 bowersj2 2315: $self->{PARM_CACHE}->{$hashkey} = $result;
1.405 albertel 2316: if (wantarray) {
1.411 ! raeburn 2317: return @{$result};
1.405 albertel 2318: }
2319: return $result->[0];
1.132 bowersj2 2320: }
2321:
1.133 bowersj2 2322: sub parmval_real {
2323: my $self = shift;
1.219 albertel 2324: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2325:
1.221 bowersj2 2326: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2327: $self->generate_course_user_opt();
2328:
1.320 albertel 2329: my $cid=$env{'request.course.id'};
2330: my $csec=$env{'request.course.sec'};
1.350 raeburn 2331: my $cgroup='';
2332: my @cgrps=split(/:/,$env{'request.course.groups'});
2333: if (@cgrps > 0) {
2334: @cgrps = sort(@cgrps);
2335: $cgroup = $cgrps[0];
2336: }
1.320 albertel 2337: my $uname=$env{'user.name'};
2338: my $udom=$env{'user.domain'};
1.133 bowersj2 2339:
1.405 albertel 2340: unless ($symb) { return ['']; }
1.133 bowersj2 2341: my $result='';
2342:
1.226 www 2343: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.383 albertel 2344: $mapname = &Apache::lonnet::deversion($mapname);
1.133 bowersj2 2345: # ----------------------------------------------------- Cascading lookup scheme
2346: my $rwhat=$what;
2347: $what=~s/^parameter\_//;
2348: $what=~s/\_/\./;
2349:
2350: my $symbparm=$symb.'.'.$what;
2351: my $mapparm=$mapname.'___(all).'.$what;
1.325 albertel 2352: my $usercourseprefix=$cid;
1.133 bowersj2 2353:
1.350 raeburn 2354: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2355: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
2356: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2357:
1.133 bowersj2 2358: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2359: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2360: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2361:
2362: my $courselevel= $usercourseprefix.'.'.$what;
2363: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2364: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2365:
2366: my $useropt = $self->{USER_OPT};
2367: my $courseopt = $self->{COURSE_OPT};
2368: my $parmhash = $self->{PARM_HASH};
2369:
2370: # ---------------------------------------------------------- first, check user
2371: if ($uname and defined($useropt)) {
1.405 albertel 2372: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2373: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
2374: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
1.133 bowersj2 2375: }
2376:
2377: # ------------------------------------------------------- second, check course
1.350 raeburn 2378: if ($cgroup ne '' and defined($courseopt)) {
1.405 albertel 2379: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2380: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
2381: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
1.350 raeburn 2382: }
2383:
1.133 bowersj2 2384: if ($csec and defined($courseopt)) {
1.405 albertel 2385: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2386: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
2387: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
1.133 bowersj2 2388: }
2389:
2390: if (defined($courseopt)) {
1.405 albertel 2391: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
1.133 bowersj2 2392: }
2393:
2394: # ----------------------------------------------------- third, check map parms
2395:
2396: my $thisparm=$$parmhash{$symbparm};
1.405 albertel 2397: if (defined($thisparm)) { return [$thisparm,'map']; }
1.133 bowersj2 2398:
2399: # ----------------------------------------------------- fourth , check default
2400:
1.246 albertel 2401: my $meta_rwhat=$rwhat;
2402: $meta_rwhat=~s/\./_/g;
2403: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
1.405 albertel 2404: if (defined($default)) { return [$default,'resource']}
1.246 albertel 2405: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.405 albertel 2406: if (defined($default)) { return [$default,'resource']}
1.315 albertel 2407: # --------------------------------------------------- fifth, check more course
2408: if (defined($courseopt)) {
1.405 albertel 2409: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
2410: if (defined($$courseopt{$courselevel})) {
2411: my $ret = [$$courseopt{$courselevel},'course'];
2412: return $ret;
2413: }
1.315 albertel 2414: }
2415: # --------------------------------------------------- sixth , cascade up parts
1.133 bowersj2 2416:
2417: my ($space,@qualifier)=split(/\./,$rwhat);
2418: my $qualifier=join('.',@qualifier);
2419: unless ($space eq '0') {
1.160 albertel 2420: my @parts=split(/_/,$space);
2421: my $id=pop(@parts);
2422: my $part=join('_',@parts);
2423: if ($part eq '') { $part='0'; }
1.405 albertel 2424: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2425: if (defined($partgeneral[0])) { return \@partgeneral; }
1.133 bowersj2 2426: }
1.405 albertel 2427: if ($recurse) { return []; }
1.399 albertel 2428: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
1.405 albertel 2429: if (defined($pack_def)) { return [$pack_def,'resource']; }
2430: return [''];
1.145 bowersj2 2431: }
2432:
1.174 albertel 2433: =pod
1.145 bowersj2 2434:
1.352 raeburn 2435: =item * B<getResourceByUrl>(url,multiple):
1.145 bowersj2 2436:
1.352 raeburn 2437: Retrieves a resource object by URL of the resource, unless the optional
1.398 banghart 2438: multiple parameter is included in which case an array of resource
1.352 raeburn 2439: objects is returned. If passed a resource object, it will simply return
2440: it, so it is safe to use this method in code like
2441: "$res = $navmap->getResourceByUrl($res)"
2442: if you're not sure if $res is already an object, or just a URL. If the
2443: resource appears multiple times in the course, only the first instance
2444: will be returned (useful for maps), unless the multiple parameter has
2445: been included, in which case all instances are returned in an array.
1.174 albertel 2446:
1.314 albertel 2447: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall):
1.174 albertel 2448:
2449: The map is a specification of a map to retreive the resources from,
2450: either as a url or as an object. The filterFunc is a reference to a
2451: function that takes a resource object as its one argument and returns
2452: true if the resource should be included, or false if it should not
2453: be. If recursive is true, the map will be recursively examined,
2454: otherwise it will not be. If bailout is true, the function will return
1.314 albertel 2455: as soon as it finds a resource, if false it will finish. If showall is
2456: true it will not hide maps that contain nothing but one other map. By
2457: default, the map is the top-level map of the course, filterFunc is a
2458: function that always returns 1, recursive is true, bailout is false,
2459: showall is false. The resources will be returned in a list containing
2460: the resource objects for the corresponding resources, with B<no
2461: structure information> in the list; regardless of branching,
2462: recursion, etc., it will be a flat list.
1.174 albertel 2463:
2464: Thus, this is suitable for cases where you don't want the structure,
2465: just a list of all resources. It is also suitable for finding out how
2466: many resources match a given description; for this use, if all you
2467: want to know is if I<any> resources match the description, the bailout
2468: parameter will allow you to avoid potentially expensive enumeration of
2469: all matching resources.
1.145 bowersj2 2470:
1.318 albertel 2471: =item * B<hasResource>(map, filterFunc, recursive, showall):
1.145 bowersj2 2472:
1.398 banghart 2473: Convenience method for
1.146 bowersj2 2474:
1.318 albertel 2475: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
1.146 bowersj2 2476:
1.174 albertel 2477: which will tell whether the map has resources matching the description
2478: in the filter function.
1.146 bowersj2 2479:
1.352 raeburn 2480: =item * B<usedVersion>(url):
2481:
2482: Retrieves version infomation for a url. Returns the version (a number, or
2483: the string "mostrecent") for resources which have version information in
2484: the big hash.
2485:
1.145 bowersj2 2486: =cut
2487:
1.277 matthew 2488:
1.145 bowersj2 2489: sub getResourceByUrl {
2490: my $self = shift;
2491: my $resUrl = shift;
1.352 raeburn 2492: my $multiple = shift;
1.145 bowersj2 2493:
2494: if (ref($resUrl)) { return $resUrl; }
2495:
2496: $resUrl = &Apache::lonnet::clutter($resUrl);
2497: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
1.352 raeburn 2498: if (!$resId) { return ''; }
2499: if ($multiple) {
2500: my @resources = ();
2501: my @resIds = split (/,/, $resId);
2502: foreach my $id (@resIds) {
1.353 raeburn 2503: my $resourceId = $self->getById($id);
2504: if ($resourceId) {
2505: push(@resources,$resourceId);
1.352 raeburn 2506: }
2507: }
2508: return @resources;
2509: } else {
2510: if ($resId =~ /,/) {
2511: $resId = (split (/,/, $resId))[0];
2512: }
2513: return $self->getById($resId);
1.145 bowersj2 2514: }
2515: }
2516:
2517: sub retrieveResources {
2518: my $self = shift;
2519: my $map = shift;
2520: my $filterFunc = shift;
2521: if (!defined ($filterFunc)) {
2522: $filterFunc = sub {return 1;};
2523: }
2524: my $recursive = shift;
2525: if (!defined($recursive)) { $recursive = 1; }
2526: my $bailout = shift;
2527: if (!defined($bailout)) { $bailout = 0; }
1.314 albertel 2528: my $showall = shift;
1.145 bowersj2 2529: # Create the necessary iterator.
2530: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 2531: $map = $self->getResourceByUrl($map);
1.145 bowersj2 2532: }
2533:
1.213 bowersj2 2534: # If nothing was passed, assume top-level map
2535: if (!$map) {
2536: $map = $self->getById('0.0');
2537: }
2538:
1.145 bowersj2 2539: # Check the map's validity.
1.213 bowersj2 2540: if (!$map->is_map()) {
1.145 bowersj2 2541: # Oh, to throw an exception.... how I'd love that!
2542: return ();
2543: }
2544:
1.146 bowersj2 2545: # Get an iterator.
2546: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.314 albertel 2547: undef, $recursive, $showall);
1.146 bowersj2 2548:
2549: my @resources = ();
2550:
1.400 albertel 2551: if (&$filterFunc($map)) {
2552: push(@resources, $map);
2553: }
2554:
1.146 bowersj2 2555: # Run down the iterator and collect the resources.
1.222 bowersj2 2556: my $curRes;
2557:
2558: while ($curRes = $it->next()) {
1.146 bowersj2 2559: if (ref($curRes)) {
2560: if (!&$filterFunc($curRes)) {
2561: next;
2562: }
2563:
1.400 albertel 2564: push(@resources, $curRes);
1.146 bowersj2 2565:
2566: if ($bailout) {
2567: return @resources;
2568: }
2569: }
2570:
2571: }
2572:
2573: return @resources;
2574: }
2575:
2576: sub hasResource {
2577: my $self = shift;
2578: my $map = shift;
2579: my $filterFunc = shift;
2580: my $recursive = shift;
1.318 albertel 2581: my $showall = shift;
1.146 bowersj2 2582:
1.318 albertel 2583: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
1.133 bowersj2 2584: }
1.51 bowersj2 2585:
1.352 raeburn 2586: sub usedVersion {
2587: my $self = shift;
2588: my $linkurl = shift;
2589: return $self->navhash("version_$linkurl");
2590: }
2591:
1.51 bowersj2 2592: 1;
2593:
2594: package Apache::lonnavmaps::iterator;
1.365 albertel 2595: use Scalar::Util qw(weaken);
1.320 albertel 2596: use Apache::lonnet;
2597:
1.51 bowersj2 2598: =pod
2599:
2600: =back
2601:
1.174 albertel 2602: =head1 Object: navmap Iterator
1.51 bowersj2 2603:
1.174 albertel 2604: An I<iterator> encapsulates the logic required to traverse a data
2605: structure. navmap uses an iterator to traverse the course map
2606: according to the criteria you wish to use.
2607:
2608: To obtain an iterator, call the B<getIterator>() function of a
2609: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
2610: directly.) This will return a reference to the iterator:
1.51 bowersj2 2611:
2612: C<my $resourceIterator = $navmap-E<gt>getIterator();>
2613:
2614: To get the next thing from the iterator, call B<next>:
2615:
2616: C<my $nextThing = $resourceIterator-E<gt>next()>
2617:
2618: getIterator behaves as follows:
2619:
2620: =over 4
2621:
1.174 albertel 2622: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
2623:
2624: All parameters are optional. firstResource is a resource reference
2625: corresponding to where the iterator should start. It defaults to
2626: navmap->firstResource() for the corresponding nav map. finishResource
2627: corresponds to where you want the iterator to end, defaulting to
2628: navmap->finishResource(). filterHash is a hash used as a set
2629: containing strings representing the resource IDs, defaulting to
2630: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 2631: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 2632: recursed on. If it is a 1, only resources NOT in the filterHash will
2633: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
2634: false (default), the iterator will only return the first level of map
2635: that is not just a single, 'redirecting' map. If true, the iterator
2636: will return all information, starting with the top-level map,
2637: regardless of content. returnTopMap, if true (default false), will
2638: cause the iterator to return the top-level map object (resource 0.0)
2639: before anything else.
2640:
2641: Thus, by default, only top-level resources will be shown. Change the
2642: condition to a 1 without changing the hash, and all resources will be
2643: shown. Changing the condition to 1 and including some values in the
2644: hash will allow you to selectively suppress parts of the navmap, while
2645: leaving it on 0 and adding things to the hash will allow you to
2646: selectively add parts of the nav map. See the handler code for
2647: examples.
2648:
2649: The iterator will return either a reference to a resource object, or a
2650: token representing something in the map, such as the beginning of a
2651: new branch. The possible tokens are:
2652:
2653: =over 4
1.51 bowersj2 2654:
1.222 bowersj2 2655: =item * B<END_ITERATOR>:
2656:
2657: The iterator has returned all that it's going to. Further calls to the
2658: iterator will just produce more of these. This is a "false" value, and
2659: is the only false value the iterator which will be returned, so it can
2660: be used as a loop sentinel.
2661:
1.217 bowersj2 2662: =item * B<BEGIN_MAP>:
1.51 bowersj2 2663:
1.174 albertel 2664: A new map is being recursed into. This is returned I<after> the map
2665: resource itself is returned.
1.51 bowersj2 2666:
1.217 bowersj2 2667: =item * B<END_MAP>:
1.174 albertel 2668:
2669: The map is now done.
1.51 bowersj2 2670:
1.217 bowersj2 2671: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 2672:
1.174 albertel 2673: A branch is now starting. The next resource returned will be the first
2674: in that branch.
1.70 bowersj2 2675:
1.217 bowersj2 2676: =item * B<END_BRANCH>:
1.70 bowersj2 2677:
1.174 albertel 2678: The branch is now done.
1.51 bowersj2 2679:
2680: =back
2681:
1.174 albertel 2682: The tokens are retreivable via methods on the iterator object, i.e.,
2683: $iterator->END_MAP.
1.70 bowersj2 2684:
1.174 albertel 2685: Maps can contain empty resources. The iterator will automatically skip
2686: over such resources, but will still treat the structure
2687: correctly. Thus, a complicated map with several branches, but
2688: consisting entirely of empty resources except for one beginning or
2689: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
2690: but only one resource will be returned.
1.116 bowersj2 2691:
1.242 matthew 2692: =back
2693:
1.222 bowersj2 2694: =head2 Normal Usage
2695:
2696: Normal usage of the iterator object is to do the following:
2697:
2698: my $it = $navmap->getIterator([your params here]);
2699: my $curRes;
2700: while ($curRes = $it->next()) {
2701: [your logic here]
2702: }
2703:
2704: Note that inside of the loop, it's frequently useful to check if
2705: "$curRes" is a reference or not with the reference function; only
2706: resource objects will be references, and any non-references will
2707: be the tokens described above.
2708:
2709: Also note there is some old code floating around that trys to track
2710: the depth of the iterator to see when it's done; do not copy that
1.398 banghart 2711: code. It is difficult to get right and harder to understand than
1.222 bowersj2 2712: this. They should be migrated to this new style.
1.51 bowersj2 2713:
2714: =cut
2715:
2716: # Here are the tokens for the iterator:
2717:
1.222 bowersj2 2718: sub END_ITERATOR { return 0; }
1.51 bowersj2 2719: sub BEGIN_MAP { return 1; } # begining of a new map
2720: sub END_MAP { return 2; } # end of the map
2721: sub BEGIN_BRANCH { return 3; } # beginning of a branch
2722: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 2723: sub FORWARD { return 1; } # go forward
2724: sub BACKWARD { return 2; }
1.51 bowersj2 2725:
1.96 bowersj2 2726: sub min {
2727: (my $a, my $b) = @_;
2728: if ($a < $b) { return $a; } else { return $b; }
2729: }
2730:
1.94 bowersj2 2731: sub new {
2732: # magic invocation to create a class instance
2733: my $proto = shift;
2734: my $class = ref($proto) || $proto;
2735: my $self = {};
2736:
1.300 albertel 2737: weaken($self->{NAV_MAP} = shift);
1.94 bowersj2 2738: return undef unless ($self->{NAV_MAP});
2739:
2740: # Handle the parameters
2741: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
2742: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
2743:
2744: # If the given resources are just the ID of the resource, get the
2745: # objects
2746: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
2747: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
2748: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
2749: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
2750:
2751: $self->{FILTER} = shift;
2752:
2753: # A hash, used as a set, of resource already seen
2754: $self->{ALREADY_SEEN} = shift;
2755: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
2756: $self->{CONDITION} = shift;
2757:
1.116 bowersj2 2758: # Do we want to automatically follow "redirection" maps?
2759: $self->{FORCE_TOP} = shift;
2760:
1.162 bowersj2 2761: # Do we want to return the top-level map object (resource 0.0)?
2762: $self->{RETURN_0} = shift;
2763: # have we done that yet?
2764: $self->{HAVE_RETURNED_0} = 0;
2765:
1.94 bowersj2 2766: # Now, we need to pre-process the map, by walking forward and backward
2767: # over the parts of the map we're going to look at.
1.96 bowersj2 2768:
1.97 bowersj2 2769: # The processing steps are exactly the same, except for a few small
2770: # changes, so I bundle those up in the following list of two elements:
2771: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
2772: # first_resource).
2773: # This prevents writing nearly-identical code twice.
2774: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
2775: 'FIRST_RESOURCE'],
2776: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
2777: 'FINISH_RESOURCE'] );
2778:
1.98 bowersj2 2779: my $maxDepth = 0; # tracks max depth
2780:
1.116 bowersj2 2781: # If there is only one resource in this map, and it's a map, we
2782: # want to remember that, so the user can ask for the first map
2783: # that isn't just a redirector.
2784: my $resource; my $resourceCount = 0;
2785:
1.209 bowersj2 2786: # Documentation on this algorithm can be found in the CVS repository at
2787: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
2788: # in that file.
1.107 bowersj2 2789: # **1**
2790:
1.97 bowersj2 2791: foreach my $pass (@iterations) {
2792: my $direction = $pass->[0];
2793: my $valName = $pass->[1];
2794: my $nextResourceMethod = $pass->[2];
2795: my $firstResourceName = $pass->[3];
2796:
2797: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
2798: $self->{FIRST_RESOURCE},
2799: $self->{FINISH_RESOURCE},
2800: {}, undef, 0, $direction);
1.96 bowersj2 2801:
1.97 bowersj2 2802: # prime the recursion
2803: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 2804: $iterator->next();
1.97 bowersj2 2805: my $curRes = $iterator->next();
1.222 bowersj2 2806: my $depth = 1;
2807: while ($depth > 0) {
2808: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
2809: if ($curRes == $iterator->END_MAP()) { $depth--; }
2810:
1.97 bowersj2 2811: if (ref($curRes)) {
1.116 bowersj2 2812: # If there's only one resource, this will save it
1.117 bowersj2 2813: # we have to filter empty resources from consideration here,
2814: # or even "empty", redirecting maps have two (start & finish)
2815: # or three (start, finish, plus redirector)
2816: if($direction == FORWARD && $curRes->src()) {
2817: $resource = $curRes; $resourceCount++;
2818: }
1.97 bowersj2 2819: my $resultingVal = $curRes->{DATA}->{$valName};
2820: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 2821: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 2822:
1.116 bowersj2 2823: if ($nextCount == 1) { # **3**
1.97 bowersj2 2824: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
2825: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
2826: }
2827:
1.116 bowersj2 2828: if ($nextCount > 1) { # **4**
1.97 bowersj2 2829: foreach my $res (@{$nextResources}) {
2830: my $current = $res->{DATA}->{$valName} || 999999999;
2831: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
2832: }
2833: }
2834: }
1.96 bowersj2 2835:
1.107 bowersj2 2836: # Assign the final val (**2**)
1.97 bowersj2 2837: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 2838: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
2839: $curRes->{DATA}->{BOT_UP_VAL});
2840:
2841: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
2842: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 2843: }
1.222 bowersj2 2844:
2845: $curRes = $iterator->next();
1.96 bowersj2 2846: }
2847: }
1.94 bowersj2 2848:
1.116 bowersj2 2849: # Check: Was this only one resource, a map?
1.255 albertel 2850: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 2851: my $firstResource = $resource->map_start();
2852: my $finishResource = $resource->map_finish();
2853: return
2854: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
2855: $finishResource, $self->{FILTER},
2856: $self->{ALREADY_SEEN},
1.314 albertel 2857: $self->{CONDITION},
2858: $self->{FORCE_TOP});
1.116 bowersj2 2859:
2860: }
2861:
1.98 bowersj2 2862: # Set up some bookkeeping information.
2863: $self->{CURRENT_DEPTH} = 0;
2864: $self->{MAX_DEPTH} = $maxDepth;
2865: $self->{STACK} = [];
2866: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 2867: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 2868:
2869: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
2870: push @{$self->{STACK}}, [];
2871: }
2872:
1.107 bowersj2 2873: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 2874: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
2875: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
2876:
2877: bless ($self);
2878:
2879: return $self;
2880: }
2881:
2882: sub next {
2883: my $self = shift;
1.256 albertel 2884: my $closeAllPages=shift;
1.222 bowersj2 2885: if ($self->{FINISHED}) {
2886: return END_ITERATOR();
2887: }
2888:
1.162 bowersj2 2889: # If we want to return the top-level map object, and haven't yet,
2890: # do so.
2891: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
2892: $self->{HAVE_RETURNED_0} = 1;
2893: return $self->{NAV_MAP}->getById('0.0');
2894: }
1.401 albertel 2895: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
2896: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
2897: return $self->BEGIN_MAP();
2898: }
1.98 bowersj2 2899:
2900: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2901: # grab the next from the recursive iterator
1.256 albertel 2902: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 2903:
2904: # is it a begin or end map? If so, update the depth
2905: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
2906: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
2907:
2908: # Are we back at depth 0? If so, stop recursing
2909: if ($self->{RECURSIVE_DEPTH} == 0) {
2910: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
2911: }
2912:
2913: return $next;
2914: }
2915:
2916: if (defined($self->{FORCE_NEXT})) {
2917: my $tmp = $self->{FORCE_NEXT};
2918: $self->{FORCE_NEXT} = undef;
2919: return $tmp;
2920: }
2921:
2922: # Have we not yet begun? If not, return BEGIN_MAP and
2923: # remember we've started.
2924: if ( !$self->{STARTED} ) {
2925: $self->{STARTED} = 1;
2926: return $self->BEGIN_MAP();
2927: }
2928:
2929: # Here's the guts of the iterator.
2930:
2931: # Find the next resource, if any.
2932: my $found = 0;
2933: my $i = $self->{MAX_DEPTH};
2934: my $newDepth;
2935: my $here;
2936: while ( $i >= 0 && !$found ) {
1.107 bowersj2 2937: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
2938: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 2939: $found = 1;
2940: $newDepth = $i;
2941: }
2942: $i--;
2943: }
2944:
2945: # If we still didn't find anything, we're done.
2946: if ( !$found ) {
2947: # We need to get back down to the correct branch depth
2948: if ( $self->{CURRENT_DEPTH} > 0 ) {
2949: $self->{CURRENT_DEPTH}--;
2950: return END_BRANCH();
2951: } else {
1.222 bowersj2 2952: $self->{FINISHED} = 1;
1.98 bowersj2 2953: return END_MAP();
2954: }
2955: }
2956:
1.104 bowersj2 2957: # If this is not a resource, it must be an END_BRANCH marker we want
2958: # to return directly.
1.107 bowersj2 2959: if (!ref($here)) { # **8**
1.104 bowersj2 2960: if ($here == END_BRANCH()) { # paranoia, in case of later extension
2961: $self->{CURRENT_DEPTH}--;
2962: return $here;
2963: }
2964: }
2965:
2966: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
2967: $self->{HERE} = $here;
2968:
1.98 bowersj2 2969: # Get to the right level
2970: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
2971: push @{$self->{STACK}->[$newDepth]}, $here;
2972: $self->{CURRENT_DEPTH}--;
2973: return END_BRANCH();
2974: }
2975: if ( $self->{CURRENT_DEPTH} < $newDepth) {
2976: push @{$self->{STACK}->[$newDepth]}, $here;
2977: $self->{CURRENT_DEPTH}++;
2978: return BEGIN_BRANCH();
2979: }
2980:
2981: # If we made it here, we have the next resource, and we're at the
2982: # right branch level. So let's examine the resource for where
2983: # we can get to from here.
2984:
2985: # So we need to look at all the resources we can get to from here,
2986: # categorize them if we haven't seen them, remember if we have a new
2987: my $nextUnfiltered = $here->getNext();
1.104 bowersj2 2988: my $maxDepthAdded = -1;
2989:
1.98 bowersj2 2990: for (@$nextUnfiltered) {
2991: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 2992: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
2993: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 2994: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 2995: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 2996: }
2997: }
1.104 bowersj2 2998:
2999: # Is this the end of a branch? If so, all of the resources examined above
1.398 banghart 3000: # led to lower levels than the one we are currently at, so we push a END_BRANCH
1.104 bowersj2 3001: # marker onto the stack so we don't forget.
3002: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3003: # BC branch and gets to C, it will see F as the only next resource, but it's
3004: # one level lower. Thus, this is the end of the branch, since there are no
3005: # more resources added to this level or above.
1.111 bowersj2 3006: # We don't do this if the examined resource is the finish resource,
3007: # because the condition given above is true, but the "END_MAP" will
3008: # take care of things and we should already be at depth 0.
1.104 bowersj2 3009: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3010: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3011: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3012: }
3013:
1.98 bowersj2 3014: # That ends the main iterator logic. Now, do we want to recurse
3015: # down this map (if this resource is a map)?
1.256 albertel 3016: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3017: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3018: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3019: my $firstResource = $self->{HERE}->map_start();
3020: my $finishResource = $self->{HERE}->map_finish();
3021:
3022: $self->{RECURSIVE_ITERATOR} =
3023: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3024: $finishResource, $self->{FILTER},
1.314 albertel 3025: $self->{ALREADY_SEEN},
3026: $self->{CONDITION},
3027: $self->{FORCE_TOP});
1.98 bowersj2 3028: }
3029:
1.116 bowersj2 3030: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3031: # Should you ever find you need it, make sure to add an option to the code
3032: # that you can use; other things depend on this behavior.
1.138 bowersj2 3033: my $browsePriv = $self->{HERE}->browsePriv();
3034: if (!$self->{HERE}->src() ||
3035: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3036: return $self->next($closeAllPages);
1.116 bowersj2 3037: }
3038:
1.98 bowersj2 3039: return $self->{HERE};
3040:
3041: }
3042:
3043: =pod
3044:
1.174 albertel 3045: The other method available on the iterator is B<getStack>, which
3046: returns an array populated with the current 'stack' of maps, as
3047: references to the resource objects. Example: This is useful when
3048: making the navigation map, as we need to check whether we are under a
3049: page map to see if we need to link directly to the resource, or to the
3050: page. The first elements in the array will correspond to the top of
3051: the stack (most inclusive map).
1.98 bowersj2 3052:
3053: =cut
3054:
3055: sub getStack {
3056: my $self=shift;
3057:
3058: my @stack;
3059:
3060: $self->populateStack(\@stack);
3061:
3062: return \@stack;
3063: }
3064:
3065: # Private method: Calls the iterators recursively to populate the stack.
3066: sub populateStack {
3067: my $self=shift;
3068: my $stack = shift;
3069:
3070: push @$stack, $self->{HERE} if ($self->{HERE});
3071:
3072: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3073: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3074: }
1.94 bowersj2 3075: }
3076:
3077: 1;
3078:
3079: package Apache::lonnavmaps::DFSiterator;
1.365 albertel 3080: use Scalar::Util qw(weaken);
1.320 albertel 3081: use Apache::lonnet;
3082:
1.100 bowersj2 3083: # Not documented in the perldoc: This is a simple iterator that just walks
3084: # through the nav map and presents the resources in a depth-first search
3085: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3086: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3087: # useful for pre-processing of some kind, and is in fact used by the main
3088: # iterator that way, but that's about it.
3089: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3090: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3091: # use might be found for it. - Jeremy
1.94 bowersj2 3092:
1.117 bowersj2 3093: # Unlike the main iterator, this DOES return all resources, even blank ones.
3094: # The main iterator needs them to correctly preprocess the map.
3095:
1.94 bowersj2 3096: sub BEGIN_MAP { return 1; } # begining of a new map
3097: sub END_MAP { return 2; } # end of the map
3098: sub FORWARD { return 1; } # go forward
3099: sub BACKWARD { return 2; }
3100:
1.100 bowersj2 3101: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3102: # filter hash ref (or undef), already seen hash or undef, condition
3103: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3104: sub new {
3105: # magic invocation to create a class instance
3106: my $proto = shift;
3107: my $class = ref($proto) || $proto;
3108: my $self = {};
3109:
1.300 albertel 3110: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3111: return undef unless ($self->{NAV_MAP});
3112:
3113: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3114: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3115:
3116: # If the given resources are just the ID of the resource, get the
3117: # objects
3118: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3119: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3120: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3121: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3122:
3123: $self->{FILTER} = shift;
3124:
3125: # A hash, used as a set, of resource already seen
3126: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3127: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3128: $self->{CONDITION} = shift;
1.89 bowersj2 3129: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3130:
1.100 bowersj2 3131: # Flag: Have we started yet?
1.51 bowersj2 3132: $self->{STARTED} = 0;
3133:
3134: # Should we continue calling the recursive iterator, if any?
3135: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3136: # The recursive iterator, if any
3137: $self->{RECURSIVE_ITERATOR} = undef;
3138: # Are we recursing on a map, or a branch?
3139: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3140: # And the count of how deep it is, so that this iterator can keep track of
3141: # when to pick back up again.
3142: $self->{RECURSIVE_DEPTH} = 0;
3143:
3144: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3145: $self->{STACK} = [];
1.51 bowersj2 3146:
3147: # Start with the first resource
1.89 bowersj2 3148: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3149: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3150: } else {
1.100 bowersj2 3151: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3152: }
1.51 bowersj2 3153:
3154: bless($self);
3155: return $self;
3156: }
3157:
3158: sub next {
3159: my $self = shift;
3160:
3161: # Are we using a recursive iterator? If so, pull from that and
3162: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3163: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3164: # grab the next from the recursive iterator
3165: my $next = $self->{RECURSIVE_ITERATOR}->next();
3166:
3167: # is it a begin or end map? Update depth if so
3168: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3169: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3170:
3171: # Are we back at depth 0? If so, stop recursing.
3172: if ($self->{RECURSIVE_DEPTH} == 0) {
3173: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3174: }
3175:
3176: return $next;
3177: }
3178:
3179: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3180: # END_MAP, which will end the iterator.
3181: if (scalar(@{$self->{STACK}}) == 0) {
3182: return $self->END_MAP();
1.51 bowersj2 3183: }
3184:
3185: # Have we not yet begun? If not, return BEGIN_MAP and
3186: # remember that we've started.
3187: if ( !$self->{STARTED} ) {
3188: $self->{STARTED} = 1;
3189: return $self->BEGIN_MAP;
3190: }
3191:
3192: # Get the next resource in the branch
1.100 bowersj2 3193: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3194:
1.100 bowersj2 3195: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3196: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3197:
3198: # Get the next possible resources
1.90 bowersj2 3199: my $nextUnfiltered;
1.89 bowersj2 3200: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3201: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3202: } else {
1.90 bowersj2 3203: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3204: }
1.51 bowersj2 3205: my $next = [];
3206:
3207: # filter the next possibilities to remove things we've
1.100 bowersj2 3208: # already seen.
1.394 raeburn 3209: foreach my $item (@$nextUnfiltered) {
3210: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
3211: push @$next, $item;
1.52 bowersj2 3212: }
1.51 bowersj2 3213: }
3214:
3215: while (@$next) {
1.100 bowersj2 3216: # copy the next possibilities over to the stack
3217: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3218: }
3219:
3220: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3221: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3222: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3223: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3224: my $firstResource = $self->{HERE}->map_start();
3225: my $finishResource = $self->{HERE}->map_finish();
3226:
3227: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3228: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3229: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3230: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3231: }
3232:
3233: return $self->{HERE};
1.190 bowersj2 3234: }
3235:
3236: # Identical to the full iterator methods of the same name. Hate to copy/paste
3237: # but I also hate to "inherit" either iterator from the other.
3238:
3239: sub getStack {
3240: my $self=shift;
3241:
3242: my @stack;
3243:
3244: $self->populateStack(\@stack);
3245:
3246: return \@stack;
3247: }
3248:
3249: # Private method: Calls the iterators recursively to populate the stack.
3250: sub populateStack {
3251: my $self=shift;
3252: my $stack = shift;
3253:
3254: push @$stack, $self->{HERE} if ($self->{HERE});
3255:
3256: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3257: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3258: }
1.51 bowersj2 3259: }
3260:
1.1 www 3261: 1;
1.2 www 3262:
1.51 bowersj2 3263: package Apache::lonnavmaps::resource;
1.365 albertel 3264: use Scalar::Util qw(weaken);
1.51 bowersj2 3265: use Apache::lonnet;
3266:
3267: =pod
3268:
1.217 bowersj2 3269: =head1 Object: resource
1.51 bowersj2 3270:
1.217 bowersj2 3271: X<resource, navmap object>
1.174 albertel 3272: A resource object encapsulates a resource in a resource map, allowing
3273: easy manipulation of the resource, querying the properties of the
3274: resource (including user properties), and represents a reference that
3275: can be used as the canonical representation of the resource by
3276: lonnavmap clients like renderers.
3277:
3278: A resource only makes sense in the context of a navmap, as some of the
3279: data is stored in the navmap object.
3280:
3281: You will probably never need to instantiate this object directly. Use
3282: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3283: starting resource.
1.51 bowersj2 3284:
1.188 bowersj2 3285: Resource objects respect the parameter_hiddenparts, which suppresses
3286: various parts according to the wishes of the map author. As of this
3287: writing, there is no way to override this parameter, and suppressed
3288: parts will never be returned, nor will their response types or ids be
3289: stored.
3290:
1.217 bowersj2 3291: =head2 Overview
1.51 bowersj2 3292:
1.217 bowersj2 3293: A B<Resource> is the most granular type of object in LON-CAPA that can
3294: be included in a course. It can either be a particular resource, like
3295: an HTML page, external resource, problem, etc., or it can be a
3296: container sequence, such as a "page" or a "map".
3297:
3298: To see a sequence from the user's point of view, please see the
3299: B<Creating a Course: Maps and Sequences> chapter of the Author's
3300: Manual.
3301:
3302: A Resource Object, once obtained from a navmap object via a B<getBy*>
3303: method of the navmap, or from an iterator, allows you to query
3304: information about that resource.
3305:
3306: Generally, you do not ever want to create a resource object yourself,
3307: so creation has been left undocumented. Always retrieve resources
3308: from navmap objects.
3309:
3310: =head3 Identifying Resources
3311:
3312: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3313: unique to that resource for a given course. X<resource ID, in big hash>
3314: The Resource ID has the form #.#, where the first number is the same
3315: for every resource in a map, and the second is unique. For instance,
3316: for a course laid out like this:
3317:
3318: * Problem 1
3319: * Map
3320: * Resource 2
3321: * Resource 3
3322:
3323: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3324: C<Resource 3> will share a first number. The second number may end up
3325: re-used between the two groups.
3326:
3327: The resource ID is only used in the big hash, but can be used in the
3328: context of a course to identify a resource easily. (For instance, the
3329: printing system uses it to record which resources from a sequence you
3330: wish to print.)
3331:
3332: X<symb> X<resource, symb>
3333: All resources also have B<symb>s, which uniquely identify a resource
3334: in a course. Many internal LON-CAPA functions expect a symb. A symb
3335: carries along with it the URL of the resource, and the map it appears
1.398 banghart 3336: in. Symbs are much larger than resource IDs.
1.51 bowersj2 3337:
3338: =cut
3339:
3340: sub new {
3341: # magic invocation to create a class instance
3342: my $proto = shift;
3343: my $class = ref($proto) || $proto;
3344: my $self = {};
3345:
1.300 albertel 3346: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3347: $self->{ID} = shift;
3348:
3349: # Store this new resource in the parent nav map's cache.
3350: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 3351: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 3352:
3353: # A hash that can be used by two-pass algorithms to store data
3354: # about this resource in. Not used by the resource object
3355: # directly.
3356: $self->{DATA} = {};
3357:
3358: bless($self);
3359:
3360: return $self;
3361: }
3362:
1.70 bowersj2 3363: # private function: simplify the NAV_HASH lookups we keep doing
3364: # pass the name, and to automatically append my ID, pass a true val on the
3365: # second param
3366: sub navHash {
3367: my $self = shift;
3368: my $param = shift;
3369: my $id = shift;
1.115 bowersj2 3370: return $self->{NAV_MAP}->navhash($param . ($id?$self->{ID}:""));
1.70 bowersj2 3371: }
3372:
1.51 bowersj2 3373: =pod
3374:
1.217 bowersj2 3375: =head2 Methods
1.70 bowersj2 3376:
1.217 bowersj2 3377: Once you have a resource object, here's what you can do with it:
3378:
3379: =head3 Attribute Retrieval
3380:
3381: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 3382:
3383: =over 4
3384:
1.217 bowersj2 3385: =item * B<ID>: Every resource has an ID that is unique for that
3386: resource in the course it is in. The ID is actually in the hash
3387: representing the resource, so for a resource object $res, obtain
3388: it via C<$res->{ID}).
3389:
1.174 albertel 3390: =item * B<compTitle>:
3391:
3392: Returns a "composite title", that is equal to $res->title() if the
3393: resource has a title, and is otherwise the last part of the URL (e.g.,
3394: "problem.problem").
3395:
3396: =item * B<ext>:
3397:
3398: Returns true if the resource is external.
3399:
3400: =item * B<kind>:
3401:
3402: Returns the kind of the resource from the compiled nav map.
3403:
3404: =item * B<randomout>:
1.106 bowersj2 3405:
1.174 albertel 3406: Returns true if this resource was chosen to NOT be shown to the user
3407: by the random map selection feature. In other words, this is usually
3408: false.
1.70 bowersj2 3409:
1.174 albertel 3410: =item * B<randompick>:
1.70 bowersj2 3411:
1.400 albertel 3412: Returns the number of randomly picked items for a map if the randompick
3413: feature is being used on the map.
3414:
3415: =item * B<randomorder>:
3416:
3417: Returns true for a map if the randomorder feature is being used on the
3418: map.
1.70 bowersj2 3419:
1.174 albertel 3420: =item * B<src>:
1.51 bowersj2 3421:
1.174 albertel 3422: Returns the source for the resource.
1.70 bowersj2 3423:
1.174 albertel 3424: =item * B<symb>:
1.70 bowersj2 3425:
1.174 albertel 3426: Returns the symb for the resource.
1.70 bowersj2 3427:
1.174 albertel 3428: =item * B<title>:
1.70 bowersj2 3429:
1.174 albertel 3430: Returns the title of the resource.
3431:
1.51 bowersj2 3432: =back
3433:
3434: =cut
3435:
3436: # These info functions can be used directly, as they don't return
3437: # resource information.
1.85 bowersj2 3438: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.303 albertel 3439: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
1.70 bowersj2 3440: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 3441: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 3442: # considered private and undocumented
1.51 bowersj2 3443: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
3444: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 3445: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
3446: sub randompick {
3447: my $self = shift;
1.410 raeburn 3448: my $randompick = $self->parmval('randompick');
3449: return $randompick;
1.68 bowersj2 3450: }
1.400 albertel 3451: sub randomorder {
3452: my $self = shift;
1.410 raeburn 3453: my $randomorder = $self->parmval('randomorder');
3454: return ($randomorder =~ /^yes$/i);
1.400 albertel 3455: }
1.303 albertel 3456: sub link {
3457: my $self=shift;
3458: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
3459: return $self->src;
3460: }
1.51 bowersj2 3461: sub src {
3462: my $self=shift;
3463: return $self->navHash("src_", 1);
3464: }
1.303 albertel 3465: sub shown_symb {
3466: my $self=shift;
3467: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->symb());}
3468: return $self->symb();
3469: }
1.328 www 3470: sub id {
3471: my $self=shift;
3472: return $self->{ID};
3473: }
3474: sub enclosing_map_src {
3475: my $self=shift;
3476: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3477: return $self->navHash('map_id_'.$first);
3478: }
1.51 bowersj2 3479: sub symb {
3480: my $self=shift;
3481: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3482: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 3483: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 3484: . '___' . $second . '___' . $symbSrc;
1.223 albertel 3485: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 3486: }
1.321 raeburn 3487: sub wrap_symb {
3488: my $self = shift;
3489: return $self->{NAV_MAP}->wrap_symb($self->symb());
3490: }
1.213 bowersj2 3491: sub title {
3492: my $self=shift;
3493: if ($self->{ID} eq '0.0') {
3494: # If this is the top-level map, return the title of the course
3495: # since this map can not be titled otherwise.
1.320 albertel 3496: return $env{'course.'.$env{'request.course.id'}.'.description'};
1.213 bowersj2 3497: }
3498: return $self->navHash("title_", 1); }
1.217 bowersj2 3499: # considered private and undocumented
1.70 bowersj2 3500: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.301 albertel 3501: sub condition {
3502: my $self=shift;
3503: my $undercond=$self->navHash("undercond_", 1);
3504: if (!defined($undercond)) { return 1; };
3505: my $condid=$self->navHash("condid_$undercond");
3506: if (!defined($condid)) { return 1; };
3507: my $condition=&Apache::lonnet::directcondval($condid);
3508: return $condition;
3509: }
1.342 albertel 3510: sub condval {
3511: my $self=shift;
1.359 albertel 3512: my ($pathname,$filename) =
3513: &Apache::lonnet::split_uri_for_cond($self->src());
1.342 albertel 3514:
3515: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3516: /\&\Q$filename\E\:([\d\|]+)\&/);
3517: if ($match) {
3518: return &Apache::lonnet::condval($1);
3519: }
3520: return 0;
3521: }
1.106 bowersj2 3522: sub compTitle {
3523: my $self = shift;
3524: my $title = $self->title();
1.176 www 3525: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 3526: if (!$title) {
3527: $title = $self->src();
3528: $title = substr($title, rindex($title, '/') + 1);
3529: }
3530: return $title;
3531: }
1.399 albertel 3532:
1.70 bowersj2 3533: =pod
3534:
3535: B<Predicate Testing the Resource>
3536:
3537: These methods are shortcuts to deciding if a given resource has a given property.
3538:
3539: =over 4
3540:
1.174 albertel 3541: =item * B<is_map>:
3542:
3543: Returns true if the resource is a map type.
3544:
3545: =item * B<is_problem>:
1.70 bowersj2 3546:
1.174 albertel 3547: Returns true if the resource is a problem type, false
3548: otherwise. (Looks at the extension on the src field; might need more
3549: to work correctly.)
1.70 bowersj2 3550:
1.174 albertel 3551: =item * B<is_page>:
1.70 bowersj2 3552:
1.174 albertel 3553: Returns true if the resource is a page.
3554:
3555: =item * B<is_sequence>:
3556:
3557: Returns true if the resource is a sequence.
1.70 bowersj2 3558:
3559: =back
3560:
3561: =cut
3562:
1.256 albertel 3563: sub hasResource {
3564: my $self = shift;
3565: return $self->{NAV_MAP}->hasResource(@_);
3566: }
3567:
3568: sub retrieveResources {
3569: my $self = shift;
3570: return $self->{NAV_MAP}->retrieveResources(@_);
3571: }
1.70 bowersj2 3572:
1.369 albertel 3573: sub is_exam {
3574: my ($self,$part) = @_;
1.410 raeburn 3575: my $type = $self->parmval('type',$part);
3576: if ($type eq 'exam') {
1.369 albertel 3577: return 1;
3578: }
3579: if ($self->src() =~ /\.(exam)$/) {
3580: return 1;
3581: }
3582: return 0;
3583: }
1.70 bowersj2 3584: sub is_html {
1.51 bowersj2 3585: my $self=shift;
3586: my $src = $self->src();
1.70 bowersj2 3587: return ($src =~ /html$/);
1.51 bowersj2 3588: }
1.70 bowersj2 3589: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
3590: sub is_page {
1.51 bowersj2 3591: my $self=shift;
3592: my $src = $self->src();
1.205 bowersj2 3593: return $self->navHash("is_map_", 1) &&
3594: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 3595: }
1.361 albertel 3596: sub is_practice {
3597: my $self=shift;
3598: my ($part) = @_;
1.410 raeburn 3599: my $type = $self->parmval('type',$part);
3600: if ($type eq 'practice') {
1.361 albertel 3601: return 1;
3602: }
3603: return 0;
3604: }
1.70 bowersj2 3605: sub is_problem {
1.51 bowersj2 3606: my $self=shift;
3607: my $src = $self->src();
1.361 albertel 3608: if ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
3609: return !($self->is_practice());
3610: }
3611: return 0;
1.256 albertel 3612: }
3613: sub contains_problem {
3614: my $self=shift;
3615: if ($self->is_page()) {
3616: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
3617: return $hasProblem;
3618: }
3619: return 0;
1.51 bowersj2 3620: }
1.401 albertel 3621: sub map_contains_problem {
3622: my $self=shift;
3623: if ($self->is_map()) {
3624: my $has_problem=
3625: $self->hasResource($self,sub { $_[0]->is_problem() },1);
3626: return $has_problem;
3627: }
3628: return 0;
3629: }
1.70 bowersj2 3630: sub is_sequence {
1.51 bowersj2 3631: my $self=shift;
1.205 bowersj2 3632: return $self->navHash("is_map_", 1) &&
3633: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 3634: }
1.261 matthew 3635: sub is_survey {
3636: my $self = shift();
3637: my $part = shift();
1.410 raeburn 3638: my $type = $self->parmval('type',$part);
3639: if ($type eq 'survey') {
1.261 matthew 3640: return 1;
3641: }
1.263 albertel 3642: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 3643: return 1;
3644: }
3645: return 0;
3646: }
1.360 albertel 3647: sub is_task {
3648: my $self=shift;
3649: my $src = $self->src();
3650: return ($src =~ /\.(task)$/)
3651: }
1.51 bowersj2 3652:
1.266 raeburn 3653: sub is_empty_sequence {
3654: my $self=shift;
3655: my $src = $self->src();
3656: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
3657: }
3658:
1.101 bowersj2 3659: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 3660: sub parmval {
3661: my $self = shift;
3662: my $what = shift;
1.185 bowersj2 3663: my $part = shift;
3664: if (!defined($part)) {
3665: $part = '0';
3666: }
1.51 bowersj2 3667: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
3668: }
3669:
1.70 bowersj2 3670: =pod
3671:
3672: B<Map Methods>
3673:
1.174 albertel 3674: These methods are useful for getting information about the map
3675: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 3676:
3677: =over 4
3678:
1.174 albertel 3679: =item * B<map_finish>:
3680:
3681: Returns a reference to a resource object corresponding to the finish
3682: resource of the map.
1.70 bowersj2 3683:
1.174 albertel 3684: =item * B<map_pc>:
1.70 bowersj2 3685:
1.174 albertel 3686: Returns the pc value of the map, which is the first number that
3687: appears in the resource ID of the resources in the map, and is the
3688: number that appears around the middle of the symbs of the resources in
3689: that map.
1.70 bowersj2 3690:
1.174 albertel 3691: =item * B<map_start>:
3692:
3693: Returns a reference to a resource object corresponding to the start
3694: resource of the map.
3695:
3696: =item * B<map_type>:
3697:
3698: Returns a string with the type of the map in it.
1.70 bowersj2 3699:
3700: =back
1.51 bowersj2 3701:
1.70 bowersj2 3702: =cut
1.51 bowersj2 3703:
3704: sub map_finish {
3705: my $self = shift;
3706: my $src = $self->src();
1.381 albertel 3707: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 3708: my $res = $self->navHash("map_finish_$src", 0);
3709: $res = $self->{NAV_MAP}->getById($res);
3710: return $res;
3711: }
1.70 bowersj2 3712: sub map_pc {
3713: my $self = shift;
1.381 albertel 3714: my $src = $self->src();
1.70 bowersj2 3715: return $self->navHash("map_pc_$src", 0);
3716: }
1.51 bowersj2 3717: sub map_start {
3718: my $self = shift;
3719: my $src = $self->src();
1.381 albertel 3720: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 3721: my $res = $self->navHash("map_start_$src", 0);
3722: $res = $self->{NAV_MAP}->getById($res);
3723: return $res;
3724: }
3725: sub map_type {
3726: my $self = shift;
3727: my $pc = $self->map_pc();
3728: return $self->navHash("map_type_$pc", 0);
3729: }
3730:
3731: #####
3732: # Property queries
3733: #####
3734:
3735: # These functions will be responsible for returning the CORRECT
3736: # VALUE for the parameter, no matter what. So while they may look
1.398 banghart 3737: # like direct calls to parmval, they can be more than that.
1.51 bowersj2 3738: # So, for instance, the duedate function should use the "duedatetype"
1.398 banghart 3739: # information, rather than the resource object user.
1.51 bowersj2 3740:
3741: =pod
3742:
3743: =head2 Resource Parameters
3744:
1.174 albertel 3745: In order to use the resource parameters correctly, the nav map must
3746: have been instantiated with genCourseAndUserOptions set to true, so
3747: the courseopt and useropt is read correctly. Then, you can call these
3748: functions to get the relevant parameters for the resource. Each
3749: function defaults to part "0", but can be directed to another part by
3750: passing the part as the parameter.
3751:
3752: These methods are responsible for getting the parameter correct, not
3753: merely reflecting the contents of the GDBM hashes. As we move towards
3754: dates relative to other dates, these methods should be updated to
3755: reflect that. (Then, anybody using these methods will not have to update
3756: their code.)
3757:
3758: =over 4
3759:
3760: =item * B<acc>:
3761:
3762: Get the Client IP/Name Access Control information.
1.51 bowersj2 3763:
1.174 albertel 3764: =item * B<answerdate>:
1.51 bowersj2 3765:
1.174 albertel 3766: Get the answer-reveal date for the problem.
3767:
1.211 bowersj2 3768: =item * B<awarded>:
3769:
3770: Gets the awarded value for the problem part. Requires genUserData set to
3771: true when the navmap object was created.
3772:
1.174 albertel 3773: =item * B<duedate>:
3774:
3775: Get the due date for the problem.
3776:
3777: =item * B<tries>:
3778:
3779: Get the number of tries the student has used on the problem.
3780:
3781: =item * B<maxtries>:
3782:
3783: Get the number of max tries allowed.
3784:
3785: =item * B<opendate>:
1.51 bowersj2 3786:
1.174 albertel 3787: Get the open date for the problem.
1.51 bowersj2 3788:
1.174 albertel 3789: =item * B<sig>:
1.51 bowersj2 3790:
1.174 albertel 3791: Get the significant figures setting.
1.51 bowersj2 3792:
1.174 albertel 3793: =item * B<tol>:
1.51 bowersj2 3794:
1.174 albertel 3795: Get the tolerance for the problem.
1.51 bowersj2 3796:
1.174 albertel 3797: =item * B<tries>:
1.51 bowersj2 3798:
1.174 albertel 3799: Get the number of tries the user has already used on the problem.
1.51 bowersj2 3800:
1.174 albertel 3801: =item * B<type>:
1.51 bowersj2 3802:
1.174 albertel 3803: Get the question type for the problem.
1.70 bowersj2 3804:
1.174 albertel 3805: =item * B<weight>:
1.51 bowersj2 3806:
1.174 albertel 3807: Get the weight for the problem.
1.51 bowersj2 3808:
3809: =back
3810:
3811: =cut
3812:
3813: sub acc {
3814: (my $self, my $part) = @_;
1.410 raeburn 3815: my $acc = $self->parmval("acc", $part);
3816: return $acc;
1.51 bowersj2 3817: }
3818: sub answerdate {
3819: (my $self, my $part) = @_;
3820: # Handle intervals
1.410 raeburn 3821: my $answerdatetype = $self->parmval("answerdate.type", $part);
3822: my $answerdate = $self->parmval("answerdate", $part);
3823: my $duedate = $self->parmval("duedate", $part);
3824: if ($answerdatetype eq 'date_interval') {
3825: $answerdate = $duedate + $answerdate;
1.51 bowersj2 3826: }
1.410 raeburn 3827: return $answerdate;
1.106 bowersj2 3828: }
1.211 bowersj2 3829: sub awarded {
3830: my $self = shift; my $part = shift;
1.221 bowersj2 3831: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 3832: if (!defined($part)) { $part = '0'; }
3833: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
3834: }
1.382 albertel 3835: # this should work exactly like the copy in lonhomework.pm
1.51 bowersj2 3836: sub duedate {
3837: (my $self, my $part) = @_;
1.382 albertel 3838: my $date;
1.406 albertel 3839: my @interval=$self->parmval("interval", $part);
1.382 albertel 3840: my $due_date=$self->parmval("duedate", $part);
1.406 albertel 3841: if ($interval[0] =~ /\d+/) {
3842: my $first_access=&Apache::lonnet::get_first_access($interval[1],
3843: $self->symb);
1.382 albertel 3844: if (defined($first_access)) {
1.406 albertel 3845: my $interval = $first_access+$interval[0];
1.404 albertel 3846: $date = (!$due_date || $interval < $due_date) ? $interval
3847: : $due_date;
1.382 albertel 3848: } else {
3849: $date = $due_date;
3850: }
3851: } else {
3852: $date = $due_date;
1.260 albertel 3853: }
1.382 albertel 3854: return $date;
1.51 bowersj2 3855: }
1.334 albertel 3856: sub handgrade {
3857: (my $self, my $part) = @_;
1.399 albertel 3858: my @response_ids = $self->responseIds($part);
3859: if (@response_ids) {
3860: foreach my $response_id (@response_ids) {
1.410 raeburn 3861: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
3862: if (lc($handgrade) eq 'yes') {
1.399 albertel 3863: return 'yes';
3864: }
3865: }
3866: }
1.410 raeburn 3867: my $handgrade = $self->parmval("handgrade", $part);
3868: return $handgrade;
1.334 albertel 3869: }
1.51 bowersj2 3870: sub maxtries {
3871: (my $self, my $part) = @_;
1.410 raeburn 3872: my $maxtries = $self->parmval("maxtries", $part);
3873: return $maxtries;
1.51 bowersj2 3874: }
3875: sub opendate {
3876: (my $self, my $part) = @_;
1.410 raeburn 3877: my $opendatetype = $self->parmval("opendate.type", $part);
3878: my $opendate = $self->parmval("opendate", $part);
3879: if ($opendatetype eq 'date_interval') {
3880: my $duedate = $self->duedate($part);
3881: $opendate = $duedate - $opendate;
1.51 bowersj2 3882: }
1.410 raeburn 3883: return $opendate;
1.51 bowersj2 3884: }
1.185 bowersj2 3885: sub problemstatus {
3886: (my $self, my $part) = @_;
1.410 raeburn 3887: my $problemstatus = $self->parmval("problemstatus", $part);
3888: return lc($problemstatus);
1.185 bowersj2 3889: }
1.51 bowersj2 3890: sub sig {
3891: (my $self, my $part) = @_;
1.410 raeburn 3892: my $sig = $self->parmval("sig", $part);
3893: return $sig;
1.51 bowersj2 3894: }
3895: sub tol {
3896: (my $self, my $part) = @_;
1.410 raeburn 3897: my $tol = $self->parmval("tol", $part);
3898: return $tol;
1.51 bowersj2 3899: }
1.410 raeburn 3900: sub tries {
1.108 bowersj2 3901: my $self = shift;
3902: my $tries = $self->queryRestoreHash('tries', shift);
3903: if (!defined($tries)) { return '0';}
1.51 bowersj2 3904: return $tries;
3905: }
1.70 bowersj2 3906: sub type {
3907: (my $self, my $part) = @_;
1.410 raeburn 3908: my $type = $self->parmval("type", $part);
3909: return $type;
1.70 bowersj2 3910: }
1.109 bowersj2 3911: sub weight {
3912: my $self = shift; my $part = shift;
1.211 bowersj2 3913: if (!defined($part)) { $part = '0'; }
1.409 raeburn 3914: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
3915: $self->symb(), $env{'user.domain'},
3916: $env{'user.name'},
3917: $env{'request.course.sec'});
3918: return $weight;
1.274 matthew 3919: }
3920: sub part_display {
3921: my $self= shift(); my $partID = shift();
3922: if (! defined($partID)) { $partID = '0'; }
3923: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
3924: $self->symb);
3925: if (! defined($display) || $display eq '') {
3926: $display = $partID;
3927: }
3928: return $display;
1.70 bowersj2 3929: }
1.51 bowersj2 3930:
3931: # Multiple things need this
3932: sub getReturnHash {
3933: my $self = shift;
3934:
3935: if (!defined($self->{RETURN_HASH})) {
1.84 bowersj2 3936: my %tmpHash = &Apache::lonnet::restore($self->symb());
1.51 bowersj2 3937: $self->{RETURN_HASH} = \%tmpHash;
3938: }
3939: }
3940:
3941: ######
3942: # Status queries
3943: ######
3944:
3945: # These methods query the status of problems.
3946:
3947: # If we need to count parts, this function determines the number of
3948: # parts from the metadata. When called, it returns a reference to a list
3949: # of strings corresponding to the parts. (Thus, using it in a scalar context
3950: # tells you how many parts you have in the problem:
3951: # $partcount = scalar($resource->countParts());
3952: # Don't use $self->{PARTS} directly because you don't know if it's been
3953: # computed yet.
3954:
3955: =pod
3956:
3957: =head2 Resource misc
3958:
3959: Misc. functions for the resource.
3960:
3961: =over 4
3962:
1.174 albertel 3963: =item * B<hasDiscussion>:
1.59 bowersj2 3964:
1.174 albertel 3965: Returns a false value if there has been discussion since the user last
3966: logged in, true if there has. Always returns false if the discussion
3967: data was not extracted when the nav map was constructed.
3968:
1.366 albertel 3969: =item * B<last_post_time>:
3970:
3971: Returns a false value if there hasn't been discussion otherwise returns
3972: unix timestamp of last time a discussion posting (or edit) was made.
3973:
1.393 raeburn 3974: =item * B<discussion_info>:
1.366 albertel 3975:
1.393 raeburn 3976: optional argument is a filter (currently can be 'unread');
3977: returns in scalar context the count of the number of discussion postings.
1.366 albertel 3978:
3979: returns in list context both the count of postings and a hash ref
1.393 raeburn 3980: containing information about the postings (subject, id, timestamp) in a hash.
3981:
3982: 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 3983:
1.174 albertel 3984: =item * B<getFeedback>:
3985:
3986: Gets the feedback for the resource and returns the raw feedback string
3987: for the resource, or the null string if there is no feedback or the
3988: email data was not extracted when the nav map was constructed. Usually
3989: used like this:
1.59 bowersj2 3990:
1.394 raeburn 3991: for my $url (split(/\,/, $res->getFeedback())) {
3992: my $link = &escape($url);
1.59 bowersj2 3993: ...
3994:
3995: and use the link as appropriate.
3996:
3997: =cut
3998:
3999: sub hasDiscussion {
4000: my $self = shift;
4001: return $self->{NAV_MAP}->hasDiscussion($self->symb());
4002: }
4003:
1.366 albertel 4004: sub last_post_time {
4005: my $self = shift;
4006: return $self->{NAV_MAP}->last_post_time($self->symb());
4007: }
4008:
1.393 raeburn 4009: sub discussion_info {
4010: my ($self,$filter) = @_;
4011: return $self->{NAV_MAP}->discussion_info($self->symb(),$filter);
1.366 albertel 4012: }
4013:
1.59 bowersj2 4014: sub getFeedback {
4015: my $self = shift;
1.124 bowersj2 4016: my $source = $self->src();
1.395 raeburn 4017: my $symb = $self->symb();
1.125 bowersj2 4018: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4019: return $self->{NAV_MAP}->getFeedback($symb,$source);
1.124 bowersj2 4020: }
4021:
4022: sub getErrors {
4023: my $self = shift;
4024: my $source = $self->src();
1.395 raeburn 4025: my $symb = $self->symb();
1.124 bowersj2 4026: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4027: return $self->{NAV_MAP}->getErrors($symb,$source);
1.59 bowersj2 4028: }
4029:
4030: =pod
4031:
1.174 albertel 4032: =item * B<parts>():
1.51 bowersj2 4033:
1.174 albertel 4034: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 4035: each part of the problem. Single part problems have only a part '0'.
4036: Multipart problems do not return their part '0', since they typically
4037: do not really matter.
1.174 albertel 4038:
4039: =item * B<countParts>():
4040:
4041: Returns the number of parts of the problem a student can answer. Thus,
4042: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 4043: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 4044:
1.290 matthew 4045: =item * B<countResponses>():
4046:
4047: Returns the total number of responses in the problem a student can answer.
4048:
4049: =item * B<responseTypes>():
4050:
4051: Returns a hash whose keys are the response types. The values are the number
4052: of times each response type is used. This is for the I<entire> problem, not
4053: just a single part.
4054:
1.192 bowersj2 4055: =item * B<multipart>():
4056:
1.193 bowersj2 4057: Returns true if the problem is multipart, false otherwise. Use this instead
4058: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 4059:
1.187 bowersj2 4060: =item * B<responseType>($part):
4061:
4062: Returns the response type of the part, without the word "response" on the
4063: end. Example return values: 'string', 'essay', 'numeric', etc.
4064:
1.193 bowersj2 4065: =item * B<responseIds>($part):
1.187 bowersj2 4066:
1.193 bowersj2 4067: Retreives the response IDs for the given part as an array reference containing
4068: strings naming the response IDs. This may be empty.
1.187 bowersj2 4069:
1.51 bowersj2 4070: =back
4071:
4072: =cut
4073:
4074: sub parts {
4075: my $self = shift;
4076:
1.192 bowersj2 4077: if ($self->ext) { return []; }
1.67 bowersj2 4078:
1.51 bowersj2 4079: $self->extractParts();
4080: return $self->{PARTS};
4081: }
4082:
4083: sub countParts {
4084: my $self = shift;
4085:
4086: my $parts = $self->parts();
1.191 bowersj2 4087:
4088: # If I left this here, then it's not necessary.
4089: #my $delta = 0;
4090: #for my $part (@$parts) {
4091: # if ($part eq '0') { $delta--; }
4092: #}
1.66 bowersj2 4093:
4094: if ($self->{RESOURCE_ERROR}) {
4095: return 0;
4096: }
4097:
1.191 bowersj2 4098: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 4099: }
4100:
1.290 matthew 4101: sub countResponses {
4102: my $self = shift;
4103: my $count;
1.293 matthew 4104: foreach my $part (@{$self->parts()}) {
4105: $count+= scalar($self->responseIds($part));
1.290 matthew 4106: }
4107: return $count;
4108: }
4109:
4110: sub responseTypes {
4111: my $self = shift;
1.291 albertel 4112: my %responses;
1.368 raeburn 4113: foreach my $part (@{$self->parts()}) {
1.290 matthew 4114: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 4115: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 4116: }
4117: }
1.291 albertel 4118: return %responses;
1.290 matthew 4119: }
4120:
1.192 bowersj2 4121: sub multipart {
4122: my $self = shift;
4123: return $self->countParts() > 1;
1.51 bowersj2 4124: }
4125:
1.225 bowersj2 4126: sub singlepart {
4127: my $self = shift;
4128: return $self->countParts() == 1;
4129: }
4130:
1.187 bowersj2 4131: sub responseType {
1.184 bowersj2 4132: my $self = shift;
4133: my $part = shift;
4134:
4135: $self->extractParts();
1.235 albertel 4136: if (defined($self->{RESPONSE_TYPES}->{$part})) {
4137: return @{$self->{RESPONSE_TYPES}->{$part}};
4138: } else {
4139: return undef;
4140: }
1.187 bowersj2 4141: }
4142:
1.193 bowersj2 4143: sub responseIds {
1.187 bowersj2 4144: my $self = shift;
4145: my $part = shift;
4146:
4147: $self->extractParts();
1.235 albertel 4148: if (defined($self->{RESPONSE_IDS}->{$part})) {
4149: return @{$self->{RESPONSE_IDS}->{$part}};
4150: } else {
4151: return undef;
4152: }
1.184 bowersj2 4153: }
4154:
4155: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 4156: # part types, and saves it.
1.51 bowersj2 4157: sub extractParts {
4158: my $self = shift;
4159:
1.153 bowersj2 4160: return if (defined($self->{PARTS}));
1.67 bowersj2 4161: return if ($self->ext);
1.51 bowersj2 4162:
4163: $self->{PARTS} = [];
4164:
1.181 bowersj2 4165: my %parts;
4166:
1.82 bowersj2 4167: # Retrieve part count, if this is a problem
4168: if ($self->is_problem()) {
1.240 albertel 4169: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 4170: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 4171:
1.239 bowersj2 4172: if ($partorder) {
4173: my @parts;
4174: for my $part (split (/,/,$partorder)) {
4175: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4176: push @parts, $part;
1.241 albertel 4177: $parts{$part} = 1;
1.239 bowersj2 4178: }
4179: }
4180: $self->{PARTS} = \@parts;
4181: } else {
4182: if (!$metadata) {
4183: $self->{RESOURCE_ERROR} = 1;
4184: $self->{PARTS} = [];
4185: $self->{PART_TYPE} = {};
4186: return;
4187: }
1.394 raeburn 4188: foreach my $entry (split(/\,/,$metadata)) {
4189: if ($entry =~ /^(?:part|Task)_(.*)$/) {
1.239 bowersj2 4190: my $part = $1;
4191: # This floods the logs if it blows up
4192: if (defined($parts{$part})) {
1.241 albertel 4193: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
4194: }
1.239 bowersj2 4195:
4196: # check to see if part is turned off.
4197:
4198: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4199: $parts{$part} = 1;
4200: }
4201: }
4202: }
4203: my @sortedParts = sort keys %parts;
4204: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 4205: }
1.82 bowersj2 4206:
1.187 bowersj2 4207:
1.284 matthew 4208: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 4209: my %responseIdHash;
4210: my %responseTypeHash;
4211:
1.189 bowersj2 4212:
4213: # Init the responseIdHash
1.394 raeburn 4214: foreach my $part (@{$self->{PARTS}}) {
4215: $responseIdHash{$part} = [];
1.189 bowersj2 4216: }
4217:
1.187 bowersj2 4218: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 4219: # response id are delimited by underscores, but both the part
1.187 bowersj2 4220: # name and response id can themselves have underscores in them.
4221: # So we have to use our knowlege of part names to figure out
4222: # where the part names begin and end, and even then, it is possible
4223: # to construct ambiguous situations.
1.379 albertel 4224: foreach my $data (split /,/, $metadata) {
4225: if ($data =~ /^([a-zA-Z]+)response_(.*)/
4226: || $data =~ /^(Task)_(.*)/) {
1.187 bowersj2 4227: my $responseType = $1;
4228: my $partStuff = $2;
4229: my $partIdSoFar = '';
4230: my @partChunks = split /_/, $partStuff;
4231: my $i = 0;
4232: for ($i = 0; $i < scalar(@partChunks); $i++) {
4233: if ($partIdSoFar) { $partIdSoFar .= '_'; }
4234: $partIdSoFar .= $partChunks[$i];
4235: if ($parts{$partIdSoFar}) {
4236: my @otherChunks = @partChunks[$i+1..$#partChunks];
4237: my $responseId = join('_', @otherChunks);
1.379 albertel 4238: if ($self->is_task()) {
4239: push(@{$responseIdHash{$partIdSoFar}},
4240: $partIdSoFar);
4241: } else {
4242: push(@{$responseIdHash{$partIdSoFar}},
4243: $responseId);
4244: }
4245: push(@{$responseTypeHash{$partIdSoFar}},
4246: $responseType);
1.187 bowersj2 4247: }
4248: }
4249: }
4250: }
1.264 albertel 4251: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 4252: #
4253: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 4254: if ($resorder) {
4255: my @resorder=split(/,/,$resorder);
4256: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 4257: my $i=0;
4258: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 4259: my @neworder;
4260: foreach my $possibleid (@resorder) {
4261: if (exists($resids{$possibleid})) {
1.286 albertel 4262: push(@neworder,$resids{$possibleid});
1.264 albertel 4263: }
4264: }
1.286 albertel 4265: my @ids;
4266: my @type;
4267: foreach my $element (@neworder) {
4268: push (@ids,$responseIdHash{$part}->[$element]);
4269: push (@type,$responseTypeHash{$part}->[$element]);
4270: }
4271: $responseIdHash{$part}=\@ids;
4272: $responseTypeHash{$part}=\@type;
1.264 albertel 4273: }
4274: }
1.187 bowersj2 4275: $self->{RESPONSE_IDS} = \%responseIdHash;
4276: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 4277: }
4278:
1.51 bowersj2 4279: return;
4280: }
4281:
4282: =pod
4283:
4284: =head2 Resource Status
4285:
1.174 albertel 4286: Problem resources have status information, reflecting their various
4287: dates and completion statuses.
1.51 bowersj2 4288:
1.174 albertel 4289: There are two aspects to the status: the date-related information and
4290: the completion information.
1.51 bowersj2 4291:
1.174 albertel 4292: Idiomatic usage of these two methods would probably look something
4293: like
1.51 bowersj2 4294:
1.394 raeburn 4295: foreach my $part ($resource->parts()) {
4296: my $dateStatus = $resource->getDateStatus($part);
4297: my $completionStatus = $resource->getCompletionStatus($part);
1.51 bowersj2 4298:
1.70 bowersj2 4299: or
4300:
1.394 raeburn 4301: my $status = $resource->status($part);
1.70 bowersj2 4302:
1.51 bowersj2 4303: ... use it here ...
4304: }
4305:
1.174 albertel 4306: Which you use depends on exactly what you are looking for. The
4307: status() function has been optimized for the nav maps display and may
4308: not precisely match what you need elsewhere.
1.101 bowersj2 4309:
1.174 albertel 4310: The symbolic constants shown below can be accessed through the
4311: resource object: C<$res->OPEN>.
1.101 bowersj2 4312:
1.51 bowersj2 4313: =over 4
4314:
1.174 albertel 4315: =item * B<getDateStatus>($part):
4316:
4317: ($part defaults to 0). A convenience function that returns a symbolic
4318: constant telling you about the date status of the part. The possible
4319: return values are:
1.51 bowersj2 4320:
4321: =back
4322:
4323: B<Date Codes>
4324:
4325: =over 4
4326:
1.174 albertel 4327: =item * B<OPEN_LATER>:
4328:
4329: The problem will be opened later.
4330:
4331: =item * B<OPEN>:
4332:
4333: Open and not yet due.
4334:
1.51 bowersj2 4335:
1.174 albertel 4336: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4337:
1.174 albertel 4338: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 4339:
1.174 albertel 4340: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 4341:
1.174 albertel 4342: The due date has passed and there is no answer opening date set.
1.51 bowersj2 4343:
1.174 albertel 4344: =item * B<ANSWER_OPEN>:
1.51 bowersj2 4345:
1.174 albertel 4346: The answer date is here.
4347:
4348: =item * B<NETWORK_FAILURE>:
4349:
4350: The information is unknown due to network failure.
1.51 bowersj2 4351:
4352: =back
4353:
4354: =cut
4355:
4356: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 4357: sub OPEN_LATER { return 0; }
4358: sub OPEN { return 1; }
4359: sub PAST_DUE_NO_ANSWER { return 2; }
4360: sub PAST_DUE_ANSWER_LATER { return 3; }
4361: sub ANSWER_OPEN { return 4; }
4362: sub NOTHING_SET { return 5; }
4363: sub NETWORK_FAILURE { return 100; }
4364:
4365: # getDateStatus gets the date status for a given problem part.
4366: # Because answer date, due date, and open date are fully independent
4367: # (i.e., it is perfectly possible to *only* have an answer date),
4368: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
4369: # (past, future, none given). This function handles this with a decision
4370: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 4371:
4372: sub getDateStatus {
4373: my $self = shift;
4374: my $part = shift;
4375: $part = "0" if (!defined($part));
1.54 bowersj2 4376:
4377: # Always return network failure if there was one.
1.51 bowersj2 4378: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4379:
4380: my $now = time();
4381:
1.53 bowersj2 4382: my $open = $self->opendate($part);
4383: my $due = $self->duedate($part);
4384: my $answer = $self->answerdate($part);
4385:
4386: if (!$open && !$due && !$answer) {
4387: # no data on the problem at all
4388: # should this be the same as "open later"? think multipart.
4389: return $self->NOTHING_SET;
4390: }
1.59 bowersj2 4391: if (!$open || $now < $open) {return $self->OPEN_LATER}
4392: if (!$due || $now < $due) {return $self->OPEN}
4393: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
4394: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 4395: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 4396: }
4397:
4398: =pod
4399:
4400: B<>
4401:
4402: =over 4
4403:
1.174 albertel 4404: =item * B<getCompletionStatus>($part):
1.51 bowersj2 4405:
1.174 albertel 4406: ($part defaults to 0.) A convenience function that returns a symbolic
4407: constant telling you about the completion status of the part, with the
4408: following possible results:
4409:
4410: =back
1.51 bowersj2 4411:
4412: B<Completion Codes>
4413:
4414: =over 4
4415:
1.174 albertel 4416: =item * B<NOT_ATTEMPTED>:
4417:
4418: Has not been attempted at all.
4419:
4420: =item * B<INCORRECT>:
4421:
4422: Attempted, but wrong by student.
1.51 bowersj2 4423:
1.174 albertel 4424: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 4425:
1.174 albertel 4426: Attempted, but wrong by instructor override.
1.51 bowersj2 4427:
1.174 albertel 4428: =item * B<CORRECT>:
1.51 bowersj2 4429:
1.174 albertel 4430: Correct or correct by instructor.
1.51 bowersj2 4431:
1.174 albertel 4432: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 4433:
1.174 albertel 4434: Correct by instructor override.
1.51 bowersj2 4435:
1.174 albertel 4436: =item * B<EXCUSED>:
4437:
4438: Excused. Not yet implemented.
4439:
4440: =item * B<NETWORK_FAILURE>:
4441:
4442: Information not available due to network failure.
4443:
4444: =item * B<ATTEMPTED>:
4445:
4446: Attempted, and not yet graded.
1.69 bowersj2 4447:
1.51 bowersj2 4448: =back
4449:
4450: =cut
4451:
1.53 bowersj2 4452: sub NOT_ATTEMPTED { return 10; }
4453: sub INCORRECT { return 11; }
4454: sub INCORRECT_BY_OVERRIDE { return 12; }
4455: sub CORRECT { return 13; }
4456: sub CORRECT_BY_OVERRIDE { return 14; }
4457: sub EXCUSED { return 15; }
1.69 bowersj2 4458: sub ATTEMPTED { return 16; }
1.51 bowersj2 4459:
4460: sub getCompletionStatus {
4461: my $self = shift;
1.332 albertel 4462: my $part = shift;
1.51 bowersj2 4463: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4464:
1.332 albertel 4465: my $status = $self->queryRestoreHash('solved', $part);
1.51 bowersj2 4466:
1.251 www 4467: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 4468: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 4469: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.332 albertel 4470: if ($status eq 'correct_by_override') {
4471: return $self->CORRECT_BY_OVERRIDE;
4472: }
1.51 bowersj2 4473: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
4474: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
4475: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 4476: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 4477: return $self->NOT_ATTEMPTED;
1.108 bowersj2 4478: }
4479:
4480: sub queryRestoreHash {
4481: my $self = shift;
4482: my $hashentry = shift;
4483: my $part = shift;
1.185 bowersj2 4484: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 4485: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4486:
4487: $self->getReturnHash();
4488:
4489: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 4490: }
4491:
4492: =pod
4493:
4494: B<Composite Status>
4495:
1.174 albertel 4496: Along with directly returning the date or completion status, the
4497: resource object includes a convenience function B<status>() that will
4498: combine the two status tidbits into one composite status that can
1.191 bowersj2 4499: represent the status of the resource as a whole. This method represents
4500: the concept of the thing we want to display to the user on the nav maps
4501: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 4502: documented in the comments of the status method. The following results
4503: may be returned, all available as methods on the resource object
1.185 bowersj2 4504: ($res->NETWORK_FAILURE): In addition to the return values that match
4505: the date or completion status, this function can return "ANSWER_SUBMITTED"
4506: if that problemstatus parameter value is set to No, suppressing the
4507: incorrect/correct feedback.
1.51 bowersj2 4508:
4509: =over 4
4510:
1.174 albertel 4511: =item * B<NETWORK_FAILURE>:
4512:
4513: The network has failed and the information is not available.
1.51 bowersj2 4514:
1.174 albertel 4515: =item * B<NOTHING_SET>:
1.53 bowersj2 4516:
1.174 albertel 4517: No dates have been set for this problem (part) at all. (Because only
4518: certain parts of a multi-part problem may be assigned, this can not be
4519: collapsed into "open later", as we do not know a given part will EVER
4520: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 4521:
1.174 albertel 4522: =item * B<CORRECT>:
1.51 bowersj2 4523:
1.174 albertel 4524: For any reason at all, the part is considered correct.
1.54 bowersj2 4525:
1.174 albertel 4526: =item * B<EXCUSED>:
1.51 bowersj2 4527:
1.174 albertel 4528: For any reason at all, the problem is excused.
1.51 bowersj2 4529:
1.174 albertel 4530: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 4531:
1.174 albertel 4532: The problem is past due, not considered correct, and no answer date is
4533: set.
1.51 bowersj2 4534:
1.174 albertel 4535: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4536:
1.174 albertel 4537: The problem is past due, not considered correct, and an answer date in
4538: the future is set.
1.51 bowersj2 4539:
1.174 albertel 4540: =item * B<ANSWER_OPEN>:
4541:
4542: The problem is past due, not correct, and the answer is now available.
4543:
4544: =item * B<OPEN_LATER>:
4545:
4546: The problem is not yet open.
4547:
4548: =item * B<TRIES_LEFT>:
4549:
4550: The problem is open, has been tried, is not correct, but there are
4551: tries left.
4552:
4553: =item * B<INCORRECT>:
4554:
4555: The problem is open, and all tries have been used without getting the
4556: correct answer.
4557:
4558: =item * B<OPEN>:
4559:
4560: The item is open and not yet tried.
4561:
4562: =item * B<ATTEMPTED>:
4563:
4564: The problem has been attempted.
1.69 bowersj2 4565:
1.185 bowersj2 4566: =item * B<ANSWER_SUBMITTED>:
4567:
4568: An answer has been submitted, but the student should not see it.
4569:
1.51 bowersj2 4570: =back
4571:
4572: =cut
4573:
1.185 bowersj2 4574: sub TRIES_LEFT { return 20; }
4575: sub ANSWER_SUBMITTED { return 21; }
1.332 albertel 4576: sub PARTIALLY_CORRECT{ return 22; }
1.51 bowersj2 4577:
4578: sub status {
4579: my $self = shift;
4580: my $part = shift;
4581: if (!defined($part)) { $part = "0"; }
4582: my $completionStatus = $self->getCompletionStatus($part);
4583: my $dateStatus = $self->getDateStatus($part);
4584:
4585: # What we have is a two-dimensional matrix with 4 entries on one
4586: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 4587: # plus network failure and "no date data at all".
1.51 bowersj2 4588:
1.222 bowersj2 4589: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 4590: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 4591:
1.408 raeburn 4592: my $suppressFeedback = 0;
4593: if (($self->problemstatus($part) eq 'no') ||
4594: ($self->problemstatus($part) eq 'no_feedback_ever')) {
4595: $suppressFeedback = 1;
4596: }
1.236 bowersj2 4597: # If there's an answer date and we're past it, don't
4598: # suppress the feedback; student should know
1.330 albertel 4599: if ($self->duedate($part) && $self->duedate($part) < time() &&
4600: $self->answerdate($part) && $self->answerdate($part) < time()) {
1.236 bowersj2 4601: $suppressFeedback = 0;
4602: }
1.185 bowersj2 4603:
1.51 bowersj2 4604: # There are a few whole rows we can dispose of:
1.53 bowersj2 4605: if ($completionStatus == CORRECT ||
4606: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.332 albertel 4607: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
4608: my $awarded=$self->awarded($part);
4609: if ($awarded < 1 && $awarded > 0) {
4610: return PARTIALLY_CORRECT;
4611: } elsif ($awarded<1) {
4612: return INCORRECT;
4613: }
4614: return CORRECT;
1.69 bowersj2 4615: }
4616:
1.343 albertel 4617: # If it's WRONG... and not open
4618: if ( ($completionStatus == INCORRECT ||
4619: $completionStatus == INCORRECT_BY_OVERRIDE)
4620: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
4621: return INCORRECT;
4622: }
4623:
1.69 bowersj2 4624: if ($completionStatus == ATTEMPTED) {
4625: return ATTEMPTED;
1.53 bowersj2 4626: }
4627:
4628: # If it's EXCUSED, then return that no matter what
4629: if ($completionStatus == EXCUSED) {
4630: return EXCUSED;
1.51 bowersj2 4631: }
4632:
1.53 bowersj2 4633: if ($dateStatus == NOTHING_SET) {
4634: return NOTHING_SET;
1.51 bowersj2 4635: }
4636:
1.69 bowersj2 4637: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
4638: # by 4 matrix (date statuses).
1.51 bowersj2 4639:
1.54 bowersj2 4640: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 4641: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 4642: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 4643: }
4644:
1.53 bowersj2 4645: if ($dateStatus == ANSWER_OPEN) {
4646: return ANSWER_OPEN;
1.51 bowersj2 4647: }
4648:
4649: # Now: (incorrect, incorrect_override, not_attempted) x
4650: # (open_later), (open)
4651:
1.53 bowersj2 4652: if ($dateStatus == OPEN_LATER) {
4653: return OPEN_LATER;
1.51 bowersj2 4654: }
4655:
4656: # If it's WRONG...
1.53 bowersj2 4657: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 4658: # and there are TRIES LEFT:
1.79 bowersj2 4659: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 4660: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 4661: }
1.185 bowersj2 4662: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 4663: }
4664:
4665: # Otherwise, it's untried and open
1.53 bowersj2 4666: return OPEN;
1.224 bowersj2 4667: }
4668:
4669: sub CLOSED { return 23; }
4670: sub ERROR { return 24; }
4671:
4672: =pod
4673:
4674: B<Simple Status>
4675:
4676: Convenience method B<simpleStatus> provides a "simple status" for the resource.
4677: "Simple status" corresponds to "which icon is shown on the
4678: Navmaps". There are six "simple" statuses:
4679:
4680: =over 4
4681:
4682: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
4683:
4684: =item * B<OPEN>: The problem is open and unattempted.
4685:
4686: =item * B<CORRECT>: The problem is correct for any reason.
4687:
4688: =item * B<INCORRECT>: The problem is incorrect and can still be
4689: completed successfully.
4690:
4691: =item * B<ATTEMPTED>: The problem has been attempted, but the student
4692: does not know if they are correct. (The ellipsis icon.)
4693:
4694: =item * B<ERROR>: There is an error retrieving information about this
4695: problem.
4696:
4697: =back
4698:
4699: =cut
4700:
4701: # This hash maps the composite status to this simple status, and
4702: # can be used directly, if you like
4703: my %compositeToSimple =
4704: (
4705: NETWORK_FAILURE() => ERROR,
4706: NOTHING_SET() => CLOSED,
4707: CORRECT() => CORRECT,
1.332 albertel 4708: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
1.224 bowersj2 4709: EXCUSED() => CORRECT,
4710: PAST_DUE_NO_ANSWER() => INCORRECT,
4711: PAST_DUE_ANSWER_LATER() => INCORRECT,
4712: ANSWER_OPEN() => INCORRECT,
4713: OPEN_LATER() => CLOSED,
4714: TRIES_LEFT() => OPEN,
4715: INCORRECT() => INCORRECT,
4716: OPEN() => OPEN,
4717: ATTEMPTED() => ATTEMPTED,
4718: ANSWER_SUBMITTED() => ATTEMPTED
4719: );
4720:
4721: sub simpleStatus {
4722: my $self = shift;
4723: my $part = shift;
4724: my $status = $self->status($part);
4725: return $compositeToSimple{$status};
1.225 bowersj2 4726: }
4727:
4728: =pod
4729:
4730: B<simpleStatusCount> will return an array reference containing, in
4731: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
4732: and ERROR parts the given problem has.
4733:
4734: =cut
4735:
4736: # This maps the status to the slot we want to increment
4737: my %statusToSlotMap =
4738: (
4739: OPEN() => 0,
4740: CLOSED() => 1,
4741: CORRECT() => 2,
4742: INCORRECT() => 3,
4743: ATTEMPTED() => 4,
4744: ERROR() => 5
4745: );
4746:
4747: sub statusToSlot { return $statusToSlotMap{shift()}; }
4748:
4749: sub simpleStatusCount {
4750: my $self = shift;
4751:
4752: my @counts = (0, 0, 0, 0, 0, 0, 0);
4753: foreach my $part (@{$self->parts()}) {
4754: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
4755: }
4756:
4757: return \@counts;
1.191 bowersj2 4758: }
4759:
4760: =pod
4761:
4762: B<Completable>
4763:
4764: The completable method represents the concept of I<whether the student can
4765: currently do the problem>. If the student can do the problem, which means
4766: that it is open, there are tries left, and if the problem is manually graded
4767: or the grade is suppressed via problemstatus, the student has not tried it
4768: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
4769: either the student has tried it and there is no feedback, or that for
4770: some reason it is no longer completable (not open yet, successfully completed,
4771: out of tries, etc.). As an example, this is used as the filter for the
4772: "Uncompleted Homework" option for the nav maps.
4773:
4774: If this does not quite meet your needs, do not fiddle with it (unless you are
4775: fixing it to better match the student's conception of "completable" because
4776: it's broken somehow)... make a new method.
4777:
4778: =cut
4779:
4780: sub completable {
4781: my $self = shift;
4782: if (!$self->is_problem()) { return 0; }
4783: my $partCount = $self->countParts();
4784:
4785: foreach my $part (@{$self->parts()}) {
4786: if ($part eq '0' && $partCount != 1) { next; }
4787: my $status = $self->status($part);
4788: # "If any of the parts are open, or have tries left (implies open),
4789: # and it is not "attempted" (manually graded problem), it is
4790: # not "complete"
1.216 bowersj2 4791: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
4792: $status == ANSWER_SUBMITTED() ) {
4793: # did this part already, as well as we can
4794: next;
4795: }
4796: if ($status == OPEN() || $status == TRIES_LEFT()) {
4797: return 1;
4798: }
1.191 bowersj2 4799: }
4800:
4801: # If all the parts were complete, so was this problem.
1.216 bowersj2 4802: return 0;
1.51 bowersj2 4803: }
4804:
4805: =pod
4806:
4807: =head2 Resource/Nav Map Navigation
4808:
4809: =over 4
4810:
1.174 albertel 4811: =item * B<getNext>():
4812:
4813: Retreive an array of the possible next resources after this
4814: one. Always returns an array, even in the one- or zero-element case.
4815:
4816: =item * B<getPrevious>():
1.85 bowersj2 4817:
1.174 albertel 4818: Retreive an array of the possible previous resources from this
4819: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 4820:
4821: =cut
4822:
4823: sub getNext {
4824: my $self = shift;
4825: my @branches;
4826: my $to = $self->to();
1.85 bowersj2 4827: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 4828: my $choice = $self->{NAV_MAP}->getById($branch);
1.342 albertel 4829: #if (!$choice->condition()) { next; }
1.51 bowersj2 4830: my $next = $choice->goesto();
4831: $next = $self->{NAV_MAP}->getById($next);
4832:
1.131 bowersj2 4833: push @branches, $next;
1.85 bowersj2 4834: }
4835: return \@branches;
4836: }
4837:
4838: sub getPrevious {
4839: my $self = shift;
4840: my @branches;
4841: my $from = $self->from();
4842: foreach my $branch ( split /,/, $from) {
4843: my $choice = $self->{NAV_MAP}->getById($branch);
4844: my $prev = $choice->comesfrom();
4845: $prev = $self->{NAV_MAP}->getById($prev);
4846:
1.131 bowersj2 4847: push @branches, $prev;
1.51 bowersj2 4848: }
4849: return \@branches;
1.131 bowersj2 4850: }
4851:
4852: sub browsePriv {
4853: my $self = shift;
4854: if (defined($self->{BROWSE_PRIV})) {
4855: return $self->{BROWSE_PRIV};
4856: }
4857:
1.311 albertel 4858: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
4859: $self->symb());
1.51 bowersj2 4860: }
4861:
4862: =pod
1.2 www 4863:
1.51 bowersj2 4864: =back
1.2 www 4865:
1.51 bowersj2 4866: =cut
1.2 www 4867:
1.51 bowersj2 4868: 1;
1.2 www 4869:
1.51 bowersj2 4870: __END__
1.2 www 4871:
4872:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>