Annotation of loncom/interface/lonnavmaps.pm, revision 1.394
1.2 www 1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
1.1 www 3: #
1.394 ! raeburn 4: # $Id: lonnavmaps.pm,v 1.393 2006/12/20 23:02:33 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);
1.300 albertel 39: use Data::Dumper; # for debugging, not always
1.316 albertel 40: use Time::HiRes qw( gettimeofday tv_interval );
1.384 www 41: use lib '/home/httpd/lib/perl/';
42: use LONCAPA;
1.2 www 43:
1.133 bowersj2 44: # symbolic constants
45: sub SYMB { return 1; }
46: sub URL { return 2; }
47: sub NOTHING { return 3; }
48:
49: # Some data
50:
1.140 bowersj2 51: my $resObj = "Apache::lonnavmaps::resource";
52:
1.135 bowersj2 53: # Keep these mappings in sync with lonquickgrades, which uses the colors
54: # instead of the icons.
55: my %statusIconMap =
1.224 bowersj2 56: (
57: $resObj->CLOSED => '',
58: $resObj->OPEN => 'navmap.open.gif',
59: $resObj->CORRECT => 'navmap.correct.gif',
1.355 www 60: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
1.224 bowersj2 61: $resObj->INCORRECT => 'navmap.wrong.gif',
62: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
63: $resObj->ERROR => ''
64: );
1.135 bowersj2 65:
66: my %iconAltTags =
67: ( 'navmap.correct.gif' => 'Correct',
68: 'navmap.wrong.gif' => 'Incorrect',
69: 'navmap.open.gif' => 'Open' );
1.133 bowersj2 70:
1.136 bowersj2 71: # Defines a status->color mapping, null string means don't color
72: my %colormap =
1.140 bowersj2 73: ( $resObj->NETWORK_FAILURE => '',
74: $resObj->CORRECT => '',
75: $resObj->EXCUSED => '#3333FF',
76: $resObj->PAST_DUE_ANSWER_LATER => '',
77: $resObj->PAST_DUE_NO_ANSWER => '',
78: $resObj->ANSWER_OPEN => '#006600',
79: $resObj->OPEN_LATER => '',
80: $resObj->TRIES_LEFT => '',
81: $resObj->INCORRECT => '',
82: $resObj->OPEN => '',
1.207 bowersj2 83: $resObj->NOTHING_SET => '',
84: $resObj->ATTEMPTED => '',
1.332 albertel 85: $resObj->ANSWER_SUBMITTED => '',
86: $resObj->PARTIALLY_CORRECT => '#006600'
1.207 bowersj2 87: );
1.136 bowersj2 88: # And a special case in the nav map; what to do when the assignment
89: # is not yet done and due in less then 24 hours
90: my $hurryUpColor = "#FF0000";
1.130 www 91:
1.269 albertel 92: sub close {
1.320 albertel 93: if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
1.269 albertel 94: return(<<ENDCLOSE);
95: <script type="text/javascript">
96: window.status='Accessing Nav Control';
97: menu=window.open("/adm/rat/empty.html","loncapanav",
98: "height=600,width=400,scrollbars=1");
99: window.status='Closing Nav Control';
100: menu.close();
101: window.status='Done.';
102: </script>
103: ENDCLOSE
104: }
1.268 albertel 105:
1.270 albertel 106: sub update {
1.320 albertel 107: if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
108: if (!$env{'request.course.id'}) { return ''; }
1.270 albertel 109: if ($ENV{'REQUEST_URI'}=~m|^/adm/navmaps|) { return ''; }
110: return(<<ENDUPDATE);
111: <form name="navform"></form>
112: <script type="text/javascript">
113: this.document.navform.action='/adm/navmaps#curloc';
114: this.document.navform.target='loncapanav';
115: this.document.navform.submit();
116: </script>
117: ENDUPDATE
118: }
1.268 albertel 119:
1.51 bowersj2 120: # Convenience functions: Returns a string that adds or subtracts
121: # the second argument from the first hash, appropriate for the
122: # query string that determines which folders to recurse on
123: sub addToFilter {
124: my $hashIn = shift;
125: my $addition = shift;
126: my %hash = %$hashIn;
127: $hash{$addition} = 1;
128:
129: return join (",", keys(%hash));
130: }
131:
132: sub removeFromFilter {
133: my $hashIn = shift;
134: my $subtraction = shift;
135: my %hash = %$hashIn;
136:
137: delete $hash{$subtraction};
138: return join(",", keys(%hash));
139: }
140:
141: # Convenience function: Given a stack returned from getStack on the iterator,
142: # return the correct src() value.
143: sub getLinkForResource {
144: my $stack = shift;
145: my $res;
146:
147: # Check to see if there are any pages in the stack
148: foreach $res (@$stack) {
1.248 www 149: if (defined($res)) {
1.308 albertel 150: my $anchor;
1.248 www 151: if ($res->is_page()) {
1.394 ! raeburn 152: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
1.384 www 153: $anchor=&escape($anchor->shown_symb());
1.308 albertel 154: return ($res->link(),$res->shown_symb(),$anchor);
1.248 www 155: }
156: # in case folder was skipped over as "only sequence"
157: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
158: if ($map=~/\.page$/) {
1.308 albertel 159: my $url=&Apache::lonnet::clutter($map);
1.384 www 160: $anchor=&escape($src->shown_symb());
1.308 albertel 161: return ($url,$res->shown_symb(),$anchor);
1.248 www 162: }
1.51 bowersj2 163: }
164: }
165:
166: # Failing that, return the src of the last resource that is defined
167: # (when we first recurse on a map, it puts an undefined resource
168: # on the bottom because $self->{HERE} isn't defined yet, and we
169: # want the src for the map anyhow)
1.394 ! raeburn 170: foreach my $item (@$stack) {
! 171: if (defined($item)) { $res = $item; }
1.51 bowersj2 172: }
173:
1.308 albertel 174: return ($res->link(),$res->shown_symb());
1.51 bowersj2 175: }
176:
1.251 www 177: # Convenience function: This separates the logic of how to create
1.53 bowersj2 178: # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
1.251 www 179: # etc.) into a separate function. It takes a resource object as the
1.53 bowersj2 180: # first parameter, and the part number of the resource as the second.
181: # It's basically a big switch statement on the status of the resource.
182:
183: sub getDescription {
184: my $res = shift;
185: my $part = shift;
1.69 bowersj2 186: my $status = $res->status($part);
1.53 bowersj2 187:
1.182 bowersj2 188: if ($status == $res->NETWORK_FAILURE) {
1.229 www 189: return &mt("Having technical difficulties; please check status later");
1.182 bowersj2 190: }
1.53 bowersj2 191: if ($status == $res->NOTHING_SET) {
1.229 www 192: return &mt("Not currently assigned.");
1.53 bowersj2 193: }
194: if ($status == $res->OPEN_LATER) {
1.341 albertel 195: return "Open " . timeToHumanString($res->opendate($part),'start');
1.53 bowersj2 196: }
197: if ($status == $res->OPEN) {
1.79 bowersj2 198: if ($res->duedate($part)) {
1.341 albertel 199: return &mt("Due")." " .timeToHumanString($res->duedate($part),'end');
1.66 bowersj2 200: } else {
1.229 www 201: return &mt("Open, no due date");
1.66 bowersj2 202: }
1.53 bowersj2 203: }
1.54 bowersj2 204: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.341 albertel 205: return &mt("Answer open")." " . timeToHumanString($res->answerdate($part),'start');
1.54 bowersj2 206: }
207: if ($status == $res->PAST_DUE_NO_ANSWER) {
1.341 albertel 208: return &mt("Was due")." " . timeToHumanString($res->duedate($part),'end');
1.53 bowersj2 209: }
1.357 albertel 210: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
211: && $res->handgrade($part) ne 'yes') {
1.229 www 212: return &mt("Answer available");
1.53 bowersj2 213: }
1.59 bowersj2 214: if ($status == $res->EXCUSED) {
1.229 www 215: return &mt("Excused by instructor");
1.59 bowersj2 216: }
1.69 bowersj2 217: if ($status == $res->ATTEMPTED) {
1.229 www 218: return &mt("Answer submitted, not yet graded");
1.69 bowersj2 219: }
1.59 bowersj2 220: if ($status == $res->TRIES_LEFT) {
1.79 bowersj2 221: my $tries = $res->tries($part);
222: my $maxtries = $res->maxtries($part);
223: my $triesString = "";
224: if ($tries && $maxtries) {
225: $triesString = "<font size=\"-1\"><i>($tries of $maxtries tries used)</i></font>";
226: if ($maxtries > 1 && $maxtries - $tries == 1) {
227: $triesString = "<b>$triesString</b>";
228: }
229: }
1.244 albertel 230: if ($res->duedate($part)) {
1.341 albertel 231: return &mt("Due")." " . timeToHumanString($res->duedate($part),'end') .
1.66 bowersj2 232: " $triesString";
233: } else {
1.229 www 234: return &mt("No due date")." $triesString";
1.66 bowersj2 235: }
1.59 bowersj2 236: }
1.185 bowersj2 237: if ($status == $res->ANSWER_SUBMITTED) {
1.229 www 238: return &mt('Answer submitted');
1.185 bowersj2 239: }
1.53 bowersj2 240: }
241:
1.115 bowersj2 242: # Convenience function, so others can use it: Is the problem due in less then
243: # 24 hours, and still can be done?
244:
1.252 matthew 245: sub dueInLessThan24Hours {
1.115 bowersj2 246: my $res = shift;
247: my $part = shift;
248: my $status = $res->status($part);
249:
1.207 bowersj2 250: return ($status == $res->OPEN() ||
1.115 bowersj2 251: $status == $res->TRIES_LEFT()) &&
1.244 albertel 252: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
253: $res->duedate($part) > time();
1.115 bowersj2 254: }
255:
256: # Convenience function, so others can use it: Is there only one try remaining for the
257: # part, with more then one try to begin with, not due yet and still can be done?
258: sub lastTry {
259: my $res = shift;
260: my $part = shift;
261:
262: my $tries = $res->tries($part);
263: my $maxtries = $res->maxtries($part);
264: return $tries && $maxtries && $maxtries > 1 &&
1.244 albertel 265: $maxtries - $tries == 1 && $res->duedate($part) &&
266: $res->duedate($part) > time();
1.115 bowersj2 267: }
268:
1.320 albertel 269: # This puts a human-readable name on the env variable.
1.177 www 270:
1.68 bowersj2 271: sub advancedUser {
1.320 albertel 272: return $env{'request.role.adv'};
1.68 bowersj2 273: }
274:
1.73 bowersj2 275:
276: # timeToHumanString takes a time number and converts it to a
277: # human-readable representation, meant to be used in the following
278: # manner:
279: # print "Due $timestring"
280: # print "Open $timestring"
281: # print "Answer available $timestring"
282: # Very, very, very, VERY English-only... goodness help a localizer on
283: # this func...
1.347 www 284:
285:
1.53 bowersj2 286: sub timeToHumanString {
1.346 foxr 287: my ($time,$type,$format) = @_;
288:
1.58 albertel 289: # zero, '0' and blank are bad times
1.73 bowersj2 290: if (!$time) {
1.229 www 291: return &mt('never');
1.73 bowersj2 292: }
1.231 www 293: unless (&Apache::lonlocal::current_language()=~/^en/) {
1.237 www 294: return &Apache::lonlocal::locallocaltime($time);
1.229 www 295: }
1.73 bowersj2 296: my $now = time();
297:
298: my @time = localtime($time);
299: my @now = localtime($now);
300:
301: # Positive = future
302: my $delta = $time - $now;
303:
304: my $minute = 60;
305: my $hour = 60 * $minute;
306: my $day = 24 * $hour;
307: my $week = 7 * $day;
308: my $inPast = 0;
309:
310: # Logic in comments:
311: # Is it now? (extremely unlikely)
312: if ( $delta == 0 ) {
313: return "this instant";
314: }
315:
316: if ($delta < 0) {
317: $inPast = 1;
318: $delta = -$delta;
319: }
320:
321: if ( $delta > 0 ) {
1.101 bowersj2 322:
1.73 bowersj2 323: my $tense = $inPast ? " ago" : "";
324: my $prefix = $inPast ? "" : "in ";
1.101 bowersj2 325:
326: # Less then a minute
1.73 bowersj2 327: if ( $delta < $minute ) {
328: if ($delta == 1) { return "${prefix}1 second$tense"; }
329: return "$prefix$delta seconds$tense";
330: }
331:
1.101 bowersj2 332: # Less then an hour
1.73 bowersj2 333: if ( $delta < $hour ) {
334: # If so, use minutes
335: my $minutes = floor($delta / 60);
336: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
337: return "$prefix$minutes minutes$tense";
338: }
339:
340: # Is it less then 24 hours away? If so,
341: # display hours + minutes
342: if ( $delta < $hour * 24) {
343: my $hours = floor($delta / $hour);
344: my $minutes = floor(($delta % $hour) / $minute);
345: my $hourString = "$hours hours";
346: my $minuteString = ", $minutes minutes";
347: if ($hours == 1) {
348: $hourString = "1 hour";
349: }
350: if ($minutes == 1) {
351: $minuteString = ", 1 minute";
352: }
353: if ($minutes == 0) {
354: $minuteString = "";
355: }
356: return "$prefix$hourString$minuteString$tense";
357: }
358:
1.346 foxr 359: # If there's a caller supplied format, use it.
360:
361: if($format ne '') {
362: my $timeStr = strftime($format, localtime($time));
1.378 albertel 363: return $timeStr.&Apache::lonlocal::gettimezone($time);
1.346 foxr 364: }
365:
1.73 bowersj2 366: # Less then 5 days away, display day of the week and
367: # HH:MM
1.346 foxr 368:
1.73 bowersj2 369: if ( $delta < $day * 5 ) {
1.85 bowersj2 370: my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
1.238 albertel 371: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 372: $timeStr =~ s/12:00 pm/noon/;
1.333 albertel 373: return ($inPast ? "last " : "this ") .
1.378 albertel 374: $timeStr.&Apache::lonlocal::gettimezone($time);
1.73 bowersj2 375: }
376:
1.341 albertel 377: my $conjunction='on';
378: if ($type eq 'start') {
379: $conjunction='at';
380: } elsif ($type eq 'end') {
381: $conjunction='by';
382: }
1.73 bowersj2 383: # Is it this year?
384: if ( $time[5] == $now[5]) {
385: # Return on Month Day, HH:MM meridian
1.341 albertel 386: my $timeStr = strftime("$conjunction %A, %b %e at %I:%M %P", localtime($time));
1.238 albertel 387: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 388: $timeStr =~ s/12:00 pm/noon/;
1.378 albertel 389: return $timeStr.&Apache::lonlocal::gettimezone($time);
1.73 bowersj2 390: }
391:
392: # Not this year, so show the year
1.341 albertel 393: my $timeStr = strftime("$conjunction %A, %b %e %Y at %I:%M %P", localtime($time));
1.238 albertel 394: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 395: $timeStr =~ s/12:00 pm/noon/;
1.378 albertel 396: return $timeStr.&Apache::lonlocal::gettimezone($time);
1.58 albertel 397: }
1.53 bowersj2 398: }
399:
1.51 bowersj2 400:
1.133 bowersj2 401: =pod
402:
1.174 albertel 403: =head1 NAME
404:
1.217 bowersj2 405: Apache::lonnavmap - Subroutines to handle and render the navigation
406: maps
1.174 albertel 407:
408: =head1 SYNOPSIS
409:
410: The main handler generates the navigational listing for the course,
411: the other objects export this information in a usable fashion for
1.205 bowersj2 412: other modules.
1.133 bowersj2 413:
1.216 bowersj2 414: =head1 OVERVIEW
415:
1.217 bowersj2 416: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
1.218 bowersj2 417: course structure and caches it in what is often referred to as the
418: "big hash" X<big hash>. You can see it if you are logged into
419: LON-CAPA, in a course, by going to /adm/test. (You may need to
420: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
421: content of the hash will be under the heading "Big Hash".
1.216 bowersj2 422:
423: Big Hash contains, among other things, how resources are related
424: to each other (next/previous), what resources are maps, which
425: resources are being chosen to not show to the student (for random
426: selection), and a lot of other things that can take a lot of time
427: to compute due to the amount of data that needs to be collected and
428: processed.
429:
430: Apache::lonnavmaps provides an object model for manipulating this
431: information in a higher-level fashion then directly manipulating
432: the hash. It also provides access to several auxilary functions
433: that aren't necessarily stored in the Big Hash, but are a per-
434: resource sort of value, like whether there is any feedback on
435: a given resource.
436:
437: Apache::lonnavmaps also abstracts away branching, and someday,
438: conditions, for the times where you don't really care about those
439: things.
440:
441: Apache::lonnavmaps also provides fairly powerful routines for
442: rendering navmaps, and last but not least, provides the navmaps
443: view for when the user clicks the NAV button.
444:
445: B<Note>: Apache::lonnavmaps I<only> works for the "currently
446: logged in user"; if you want things like "due dates for another
447: student" lonnavmaps can not directly retrieve information like
448: that. You need the EXT function. This module can still help,
449: because many things, such as the course structure, are constant
450: between users, and Apache::lonnavmaps can help by providing
451: symbs for the EXT call.
452:
453: The rest of this file will cover the provided rendering routines,
454: which can often be used without fiddling with the navmap object at
455: all, then documents the Apache::lonnavmaps::navmap object, which
456: is the key to accessing the Big Hash information, covers the use
457: of the Iterator (which provides the logic for traversing the
458: somewhat-complicated Big Hash data structure), documents the
459: Apache::lonnavmaps::Resource objects that are returned by
460:
1.205 bowersj2 461: =head1 Subroutine: render
1.133 bowersj2 462:
1.174 albertel 463: The navmap renderer package provides a sophisticated rendering of the
464: standard navigation maps interface into HTML. The provided nav map
465: handler is actually just a glorified call to this.
1.133 bowersj2 466:
1.216 bowersj2 467: Because of the large number of parameters this function accepts,
1.174 albertel 468: instead of passing it arguments as is normal, pass it in an anonymous
1.216 bowersj2 469: hash with the desired options.
1.174 albertel 470:
471: The package provides a function called 'render', called as
1.205 bowersj2 472: Apache::lonnavmaps::render({}).
1.51 bowersj2 473:
1.133 bowersj2 474: =head2 Overview of Columns
1.51 bowersj2 475:
1.174 albertel 476: The renderer will build an HTML table for the navmap and return
477: it. The table is consists of several columns, and a row for each
478: resource (or possibly each part). You tell the renderer how many
479: columns to create and what to place in each column, optionally using
1.205 bowersj2 480: one or more of the prepared columns, and the renderer will assemble
1.174 albertel 481: the table.
482:
483: Any additional generally useful column types should be placed in the
484: renderer code here, so anybody can use it anywhere else. Any code
485: specific to the current application (such as the addition of <input>
486: elements in a column) should be placed in the code of the thing using
487: the renderer.
488:
489: At the core of the renderer is the array reference COLS (see Example
490: section below for how to pass this correctly). The COLS array will
491: consist of entries of one of two types of things: Either an integer
492: representing one of the pre-packaged column types, or a sub reference
493: that takes a resource reference, a part number, and a reference to the
494: argument hash passed to the renderer, and returns a string that will
495: be inserted into the HTML representation as it.
496:
1.216 bowersj2 497: All other parameters are ways of either changing how the columns
498: are printing, or which rows are shown.
499:
1.174 albertel 500: The pre-packaged column names are refered to by constants in the
1.205 bowersj2 501: Apache::lonnavmaps namespace. The following currently exist:
1.51 bowersj2 502:
1.174 albertel 503: =over 4
1.51 bowersj2 504:
1.216 bowersj2 505: =item * B<Apache::lonnavmaps::resource>:
1.51 bowersj2 506:
1.174 albertel 507: The general info about the resource: Link, icon for the type, etc. The
1.216 bowersj2 508: first column in the standard nav map display. This column provides the
509: indentation effect seen in the B<NAV> screen. This column also accepts
1.205 bowersj2 510: the following parameters in the renderer hash:
1.51 bowersj2 511:
1.133 bowersj2 512: =over 4
1.51 bowersj2 513:
1.216 bowersj2 514: =item * B<resource_nolink>: default false
1.51 bowersj2 515:
1.216 bowersj2 516: If true, the resource will not be linked. By default, all non-folder
517: resources are linked.
1.174 albertel 518:
1.216 bowersj2 519: =item * B<resource_part_count>: default true
1.51 bowersj2 520:
1.216 bowersj2 521: If true, the resource will show a part count B<if> the full
522: part list is not displayed. (See "condense_parts" later.) If false,
523: the resource will never show a part count.
1.133 bowersj2 524:
1.174 albertel 525: =item * B<resource_no_folder_link>:
1.133 bowersj2 526:
1.174 albertel 527: If true, the resource's folder will not be clickable to open or close
528: it. Default is false. True implies printCloseAll is false, since you
529: can't close or open folders when this is on anyhow.
1.144 bowersj2 530:
1.133 bowersj2 531: =back
1.51 bowersj2 532:
1.225 bowersj2 533: =item * B<Apache::lonnavmaps::communication_status>:
1.174 albertel 534:
535: Whether there is discussion on the resource, email for the user, or
536: (lumped in here) perl errors in the execution of the problem. This is
537: the second column in the main nav map.
538:
1.225 bowersj2 539: =item * B<Apache::lonnavmaps::quick_status>:
1.51 bowersj2 540:
1.216 bowersj2 541: An icon for the status of a problem, with five possible states:
542: Correct, incorrect, open, awaiting grading (for a problem where the
543: computer's grade is suppressed, or the computer can't grade, like
544: essay problem), or none (not open yet, not a problem). The
1.174 albertel 545: third column of the standard navmap.
1.51 bowersj2 546:
1.225 bowersj2 547: =item * B<Apache::lonnavmaps::long_status>:
1.174 albertel 548:
549: A text readout of the details of the current status of the problem,
550: such as "Due in 22 hours". The fourth column of the standard navmap.
1.51 bowersj2 551:
1.225 bowersj2 552: =item * B<Apache::lonnavmaps::part_status_summary>:
553:
554: A text readout summarizing the status of the problem. If it is a
555: single part problem, will display "Correct", "Incorrect",
556: "Not yet open", "Open", "Attempted", or "Error". If there are
557: multiple parts, this will output a string that in HTML will show a
558: status of how many parts are in each status, in color coding, trying
559: to match the colors of the icons within reason.
560:
561: Note this only makes sense if you are I<not> showing parts. If
562: C<showParts> is true (see below), this column will not output
563: anything.
564:
1.133 bowersj2 565: =back
1.51 bowersj2 566:
1.133 bowersj2 567: If you add any others please be sure to document them here.
1.51 bowersj2 568:
1.174 albertel 569: An example of a column renderer that will show the ID number of a
570: resource, along with the part name if any:
1.51 bowersj2 571:
1.133 bowersj2 572: sub {
573: my ($resource, $part, $params) = @_;
574: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
575: return '<td>' . $resource->{ID} . '</td>';
576: }
1.51 bowersj2 577:
1.174 albertel 578: Note these functions are responsible for the TD tags, which allow them
579: to override vertical and horizontal alignment, etc.
1.130 www 580:
1.133 bowersj2 581: =head2 Parameters
1.115 bowersj2 582:
1.217 bowersj2 583: Minimally, you should be
1.174 albertel 584: able to get away with just using 'cols' (to specify the columns
585: shown), 'url' (necessary for the folders to link to the current screen
586: correctly), and possibly 'queryString' if your app calls for it. In
587: that case, maintaining the state of the folders will be done
588: automatically.
1.140 bowersj2 589:
1.133 bowersj2 590: =over 4
1.51 bowersj2 591:
1.320 albertel 592: =item * B<iterator>: default: constructs one from %env
1.174 albertel 593:
594: A reference to a fresh ::iterator to use from the navmaps. The
595: rendering will reflect the options passed to the iterator, so you can
596: use that to just render a certain part of the course, if you like. If
597: one is not passed, the renderer will attempt to construct one from
1.320 albertel 598: env{'form.filter'} and env{'form.condition'} information, plus the
1.174 albertel 599: 'iterator_map' parameter if any.
600:
1.216 bowersj2 601: =item * B<iterator_map>: default: not used
1.174 albertel 602:
603: If you are letting the renderer do the iterator handling, you can
604: instruct the renderer to render only a particular map by passing it
605: the source of the map you want to process, like
606: '/res/103/jerf/navmap.course.sequence'.
607:
1.320 albertel 608: =item * B<navmap>: default: constructs one from %env
1.174 albertel 609:
610: A reference to a navmap, used only if an iterator is not passed in. If
611: this is necessary to make an iterator but it is not passed in, a new
1.320 albertel 612: one will be constructed based on env info. This is useful to do basic
1.174 albertel 613: error checking before passing it off to render.
614:
1.216 bowersj2 615: =item * B<r>: default: must be passed in
1.174 albertel 616:
617: The standard Apache response object. This must be passed to the
618: renderer or the course hash will be locked.
619:
1.216 bowersj2 620: =item * B<cols>: default: empty (useless)
1.174 albertel 621:
622: An array reference
623:
1.216 bowersj2 624: =item * B<showParts>:default true
1.174 albertel 625:
1.216 bowersj2 626: A flag. If true, a line for the resource itself, and a line
1.174 albertel 627: for each part will be displayed. If not, only one line for each
628: resource will be displayed.
629:
1.216 bowersj2 630: =item * B<condenseParts>: default true
1.174 albertel 631:
1.216 bowersj2 632: A flag. If true, if all parts of the problem have the same
1.174 albertel 633: status and that status is Nothing Set, Correct, or Network Failure,
634: then only one line will be displayed for that resource anyhow. If no,
635: all parts will always be displayed. If showParts is 0, this is
636: ignored.
637:
1.320 albertel 638: =item * B<jumpCount>: default: determined from %env
1.174 albertel 639:
1.216 bowersj2 640: A string identifying the URL to place the anchor 'curloc' at.
641: It is the responsibility of the renderer user to
1.174 albertel 642: ensure that the #curloc is in the URL. By default, determined through
1.320 albertel 643: the use of the env{} 'jump' information, and should normally "just
1.174 albertel 644: work" correctly.
1.144 bowersj2 645:
1.216 bowersj2 646: =item * B<here>: default: empty string
1.140 bowersj2 647:
1.216 bowersj2 648: A Symb identifying where to place the 'here' marker. The empty
649: string means no marker.
1.92 bowersj2 650:
1.216 bowersj2 651: =item * B<indentString>: default: 25 pixel whitespace image
1.164 bowersj2 652:
1.216 bowersj2 653: A string identifying the indentation string to use.
1.92 bowersj2 654:
1.216 bowersj2 655: =item * B<queryString>: default: empty
1.51 bowersj2 656:
1.174 albertel 657: A string which will be prepended to the query string used when the
1.216 bowersj2 658: folders are opened or closed. You can use this to pass
659: application-specific values.
1.55 bowersj2 660:
1.216 bowersj2 661: =item * B<url>: default: none
1.84 bowersj2 662:
1.174 albertel 663: The url the folders will link to, which should be the current
1.216 bowersj2 664: page. Required if the resource info column is shown, and you
665: are allowing the user to open and close folders.
1.115 bowersj2 666:
1.216 bowersj2 667: =item * B<currentJumpIndex>: default: no jumping
1.55 bowersj2 668:
1.174 albertel 669: Describes the currently-open row number to cause the browser to jump
670: to, because the user just opened that folder. By default, pulled from
1.320 albertel 671: the Jump information in the env{'form.*'}.
1.51 bowersj2 672:
1.216 bowersj2 673: =item * B<printKey>: default: false
1.51 bowersj2 674:
1.174 albertel 675: If true, print the key that appears on the top of the standard
1.216 bowersj2 676: navmaps.
1.139 bowersj2 677:
1.216 bowersj2 678: =item * B<printCloseAll>: default: true
1.140 bowersj2 679:
1.174 albertel 680: If true, print the "Close all folders" or "open all folders"
1.216 bowersj2 681: links.
1.140 bowersj2 682:
1.216 bowersj2 683: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.153 bowersj2 684:
1.174 albertel 685: A function that takes the resource object as its only parameter and
686: returns a true or false value. If true, the resource is displayed. If
1.216 bowersj2 687: false, it is simply skipped in the display.
1.174 albertel 688:
1.216 bowersj2 689: =item * B<suppressEmptySequences>: default: false
1.190 bowersj2 690:
691: If you're using a filter function, and displaying sequences to orient
692: the user, then frequently some sequences will be empty. Setting this to
693: true will cause those sequences not to display, so as not to confuse the
694: user into thinking that if the sequence is there there should be things
1.216 bowersj2 695: under it; for example, see the "Show Uncompleted Homework" view on the
696: B<NAV> screen.
1.190 bowersj2 697:
1.216 bowersj2 698: =item * B<suppressNavmaps>: default: false
1.174 albertel 699:
1.216 bowersj2 700: If true, will not display Navigate Content resources.
1.143 bowersj2 701:
1.133 bowersj2 702: =back
1.51 bowersj2 703:
1.133 bowersj2 704: =head2 Additional Info
1.51 bowersj2 705:
1.174 albertel 706: In addition to the parameters you can pass to the renderer, which will
707: be passed through unchange to the column renderers, the renderer will
708: generate the following information which your renderer may find
709: useful:
710:
1.216 bowersj2 711: =over 4
712:
713: =item * B<counter>:
1.145 bowersj2 714:
1.216 bowersj2 715: Contains the number of rows printed. Useful after calling the render
716: function, as you can detect whether anything was printed at all.
717:
718: =item * B<isNewBranch>:
719:
720: Useful for renderers: If this resource is currently the first resource
721: of a new branch, this will be true. The Resource column (leftmost in the
722: navmaps screen) uses this to display the "new branch" icon
1.59 bowersj2 723:
1.133 bowersj2 724: =back
1.59 bowersj2 725:
1.133 bowersj2 726: =cut
1.59 bowersj2 727:
1.133 bowersj2 728: sub resource { return 0; }
729: sub communication_status { return 1; }
730: sub quick_status { return 2; }
731: sub long_status { return 3; }
1.225 bowersj2 732: sub part_status_summary { return 4; }
1.51 bowersj2 733:
1.133 bowersj2 734: sub render_resource {
735: my ($resource, $part, $params) = @_;
1.51 bowersj2 736:
1.133 bowersj2 737: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 738:
1.134 bowersj2 739: my $link = $params->{"resourceLink"};
1.306 foxr 740:
741: # The URL part is not escaped at this point, but the symb is...
742: # The stuff to the left of the ? must have ' replaced by \' since
743: # it will be quoted with ' in the href.
744:
745: my ($left,$right) = split(/\?/, $link);
746: $link = $left.'?'.$right;
747:
1.134 bowersj2 748: my $src = $resource->src();
749: my $it = $params->{"iterator"};
1.133 bowersj2 750: my $filter = $it->{FILTER};
751:
752: my $title = $resource->compTitle();
1.258 albertel 753:
1.133 bowersj2 754: my $partLabel = "";
755: my $newBranchText = "";
1.298 albertel 756: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
1.133 bowersj2 757: # If this is a new branch, label it so
758: if ($params->{'isNewBranch'}) {
1.329 albertel 759: $newBranchText = "<img src='$location/branch.gif' border='0' alt='Branch' />";
1.51 bowersj2 760: }
761:
1.133 bowersj2 762: # links to open and close the folder
1.306 foxr 763:
764:
1.349 foxr 765: my $linkopen = "<a href=\"$link\">";
1.306 foxr 766:
767:
1.133 bowersj2 768: my $linkclose = "</a>";
1.51 bowersj2 769:
1.204 albertel 770: # Default icon: unknown page
1.329 albertel 771: my $icon = "<img src='$location/unknown.gif' alt='' border='0' alt=' ' ' />";
1.133 bowersj2 772:
773: if ($resource->is_problem()) {
1.192 bowersj2 774: if ($part eq '0' || $params->{'condensed'}) {
1.389 albertel 775: $icon = '<img src="'.$location.'/';
776: if ($resource->is_task()) {
777: $icon .= 'task.gif" alt="'.&mt('Task');
778: } else {
779: $icon .= 'problem.gif" alt="'.&mt('Problem');
780: }
781: $icon .='" border="0" />';
1.133 bowersj2 782: } else {
783: $icon = $params->{'indentString'};
784: }
1.204 albertel 785: } else {
1.329 albertel 786: $icon = "<img src='".&Apache::loncommon::icon($resource->src)."' alt=' ' border='0' />";
1.133 bowersj2 787: }
1.51 bowersj2 788:
1.133 bowersj2 789: # Display the correct map icon to open or shut map
790: if ($resource->is_map()) {
791: my $mapId = $resource->map_pc();
792: my $nowOpen = !defined($filter->{$mapId});
793: if ($it->{CONDITION}) {
794: $nowOpen = !$nowOpen;
795: }
1.144 bowersj2 796:
1.205 bowersj2 797: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1.362 www 798: my $title=$resource->title;
1.363 albertel 799: $title=~s/\"/\"/g;
1.144 bowersj2 800: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 801: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.363 albertel 802: $icon = "<img src='$location/$icon' alt=\"".
803: ($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
1.144 bowersj2 804:
1.349 foxr 805: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1.392 albertel 806: $params->{'queryString'} . '&filter=';
1.144 bowersj2 807: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
808: addToFilter($filter, $mapId) :
809: removeFromFilter($filter, $mapId);
1.392 albertel 810: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
811: . $params->{'hereType'} . '&here=' .
1.384 www 812: &escape($params->{'here'}) .
1.392 albertel 813: '&jump=' .
1.384 www 814: &escape($resource->symb()) .
1.392 albertel 815: "&folderManip=1\">";
1.306 foxr 816:
1.144 bowersj2 817: } else {
818: # Don't allow users to manipulate folder
1.205 bowersj2 819: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
1.144 bowersj2 820: '.nomanip.gif';
1.364 www 821: $icon = "<img src='$location/$icon' alt=\"".
822: ($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
1.144 bowersj2 823:
824: $linkopen = "";
825: $linkclose = "";
826: }
1.133 bowersj2 827: }
1.51 bowersj2 828:
1.133 bowersj2 829: if ($resource->randomout()) {
1.362 www 830: $nonLinkedText .= ' <i>('.&mt('hidden').')</i> ';
1.133 bowersj2 831: }
1.342 albertel 832: if (!$resource->condval()) {
1.362 www 833: $nonLinkedText .= ' <i>('.&mt('conditionally hidden').')</i> ';
1.342 albertel 834: }
1.133 bowersj2 835:
836: # We're done preparing and finally ready to start the rendering
1.392 albertel 837: my $result = "<td align='left' valign='middle'>";
1.140 bowersj2 838:
839: my $indentLevel = $params->{'indentLevel'};
840: if ($newBranchText) { $indentLevel--; }
841:
1.133 bowersj2 842: # print indentation
1.140 bowersj2 843: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 844: $result .= $params->{'indentString'};
1.84 bowersj2 845: }
846:
1.133 bowersj2 847: # Decide what to display
1.306 foxr 848:
1.133 bowersj2 849: $result .= "$newBranchText$linkopen$icon$linkclose";
850:
851: my $curMarkerBegin = '';
852: my $curMarkerEnd = '';
1.51 bowersj2 853:
1.133 bowersj2 854: # Is this the current resource?
1.158 bowersj2 855: if (!$params->{'displayedHereMarker'} &&
856: $resource->symb() eq $params->{'here'} ) {
1.345 www 857: $curMarkerBegin = '<font color="red" size="+2">></font>';
1.133 bowersj2 858: $curMarkerEnd = '<font color="red" size="+2"><</font>';
1.158 bowersj2 859: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 860: }
861:
1.192 bowersj2 862: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 863: !$params->{'condensed'}) {
1.274 matthew 864: my $displaypart=$resource->part_display($part);
1.363 albertel 865: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1.384 www 866: if ($link!~/\#/) { $link.='#'.&escape($part); }
1.133 bowersj2 867: $title = "";
1.51 bowersj2 868: }
869:
1.163 bowersj2 870: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.363 albertel 871: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1.51 bowersj2 872: }
873:
1.268 albertel 874: my $target;
1.320 albertel 875: if ($env{'environment.remotenavmap'} eq 'on') {
1.268 albertel 876: $target=' target="loncapaclient" ';
877: }
1.266 raeburn 878: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.349 foxr 879: $result .= " $curMarkerBegin<a $target href=\"$link\">$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
1.144 bowersj2 880: } else {
881: $result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
882: }
1.51 bowersj2 883:
1.133 bowersj2 884: return $result;
885: }
1.51 bowersj2 886:
1.133 bowersj2 887: sub render_communication_status {
888: my ($resource, $part, $params) = @_;
1.134 bowersj2 889: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
890:
891: my $link = $params->{"resourceLink"};
1.335 albertel 892: my $target;
893: if ($env{'environment.remotenavmap'} eq 'on') {
894: $target=' target="loncapaclient" ';
895: }
1.349 foxr 896: my $linkopen = "<a $target href=\"$link\">";
1.134 bowersj2 897: my $linkclose = "</a>";
1.298 albertel 898: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.134 bowersj2 899: if ($resource->hasDiscussion()) {
900: $discussionHTML = $linkopen .
1.392 albertel 901: '<img alt="'.&mt('New Discussion').'" border="0" src="'.$location.'/chat.gif" />' .
1.134 bowersj2 902: $linkclose;
903: }
904:
905: if ($resource->getFeedback()) {
906: my $feedback = $resource->getFeedback();
1.394 ! raeburn 907: foreach my $msgid (split(/\,/, $feedback)) {
! 908: if ($msgid) {
1.335 albertel 909: $feedbackHTML .= ' <a '.$target.' href="/adm/email?display='
1.394 ! raeburn 910: . &escape($msgid) . '">'
1.392 albertel 911: . '<img alt="'.&mt('New Email').'" src="'.$location.'/feedback.gif" '
1.134 bowersj2 912: . 'border="0" /></a>';
913: }
914: }
915: }
916:
917: if ($resource->getErrors()) {
918: my $errors = $resource->getErrors();
1.254 matthew 919: my $errorcount = 0;
1.394 ! raeburn 920: foreach my $msgid (split(/,/, $errors)) {
1.254 matthew 921: last if ($errorcount>=10); # Only output 10 bombs maximum
1.394 ! raeburn 922: if ($msgid) {
1.254 matthew 923: $errorcount++;
1.335 albertel 924: $errorHTML .= ' <a '.$target.' href="/adm/email?display='
1.394 ! raeburn 925: . &escape($msgid) . '">'
1.392 albertel 926: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" '
1.134 bowersj2 927: . 'border="0" /></a>';
928: }
929: }
1.197 bowersj2 930: }
931:
932: if ($params->{'multipart'} && $part != '0') {
933: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 934: }
935:
1.392 albertel 936: return "<td width=\"75\" align=\"left\" valign=\"middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1.134 bowersj2 937:
1.133 bowersj2 938: }
939: sub render_quick_status {
940: my ($resource, $part, $params) = @_;
1.135 bowersj2 941: my $result = "";
942: my $firstDisplayed = !$params->{'condensed'} &&
943: $params->{'multipart'} && $part eq "0";
944:
945: my $link = $params->{"resourceLink"};
1.335 albertel 946: my $target;
947: if ($env{'environment.remotenavmap'} eq 'on') {
948: $target=' target="loncapaclient" ';
949: }
1.349 foxr 950: my $linkopen = "<a $target href=\"$link\">";
1.135 bowersj2 951: my $linkclose = "</a>";
952:
953: if ($resource->is_problem() &&
954: !$firstDisplayed) {
1.224 bowersj2 955:
956: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 957: my $alt = $iconAltTags{$icon};
958: if ($icon) {
1.298 albertel 959: my $location=
960: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1.392 albertel 961: $result .= "<td valign='middle' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";
1.135 bowersj2 962: } else {
963: $result .= "<td width='30'> </td>\n";
964: }
965: } else { # not problem, no icon
966: $result .= "<td width='30'> </td>\n";
967: }
968:
969: return $result;
1.133 bowersj2 970: }
971: sub render_long_status {
972: my ($resource, $part, $params) = @_;
1.392 albertel 973: my $result = "<td align='right' valign='middle'>\n";
1.136 bowersj2 974: my $firstDisplayed = !$params->{'condensed'} &&
975: $params->{'multipart'} && $part eq "0";
976:
977: my $color;
1.212 bowersj2 978: if ($resource->is_problem()) {
1.136 bowersj2 979: $color = $colormap{$resource->status};
980:
1.252 matthew 981: if (dueInLessThan24Hours($resource, $part) ||
1.136 bowersj2 982: lastTry($resource, $part)) {
983: $color = $hurryUpColor;
984: }
985: }
986:
987: if ($resource->kind() eq "res" &&
988: $resource->is_problem() &&
989: !$firstDisplayed) {
990: if ($color) {$result .= "<font color=\"$color\"><b>"; }
991: $result .= getDescription($resource, $part);
992: if ($color) {$result .= "</b></font>"; }
993: }
994: if ($resource->is_map() && advancedUser() && $resource->randompick()) {
995: $result .= '(randomly select ' . $resource->randompick() .')';
996: }
1.210 bowersj2 997:
1.213 bowersj2 998: # Debugging code
999: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1000: # ' - Part: ' . $part;
1001:
1.210 bowersj2 1002: $result .= "</td>\n";
1.136 bowersj2 1003:
1004: return $result;
1.51 bowersj2 1005: }
1006:
1.227 bowersj2 1007: # Colors obtained by taking the icons, matching the colors, and
1008: # possibly reducing the Value (HSV) of the color, if it's too bright
1009: # for text, generally by one third or so.
1.225 bowersj2 1010: my %statusColors =
1011: (
1012: $resObj->CLOSED => '#000000',
1.227 bowersj2 1013: $resObj->OPEN => '#998b13',
1014: $resObj->CORRECT => '#26933f',
1015: $resObj->INCORRECT => '#c48207',
1016: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1017: $resObj->ERROR => '#000000'
1018: );
1019: my %statusStrings =
1020: (
1021: $resObj->CLOSED => 'Not yet open',
1022: $resObj->OPEN => 'Open',
1023: $resObj->CORRECT => 'Correct',
1024: $resObj->INCORRECT => 'Incorrect',
1025: $resObj->ATTEMPTED => 'Attempted',
1026: $resObj->ERROR => 'Network Error'
1027: );
1028: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1029:
1030: use Data::Dumper;
1031: sub render_parts_summary_status {
1032: my ($resource, $part, $params) = @_;
1.256 albertel 1033: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1034: if ($params->{showParts}) {
1035: return '<td></td>';
1036: }
1037:
1038: my $td = "<td align='right'>\n";
1039: my $endtd = "</td>\n";
1.256 albertel 1040: my @probs;
1.225 bowersj2 1041:
1.256 albertel 1042: if ($resource->contains_problem) {
1043: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1044: } else {
1045: @probs=($resource);
1046: }
1047: my $return;
1048: my %overallstatus;
1049: my $totalParts;
1050: foreach my $resource (@probs) {
1051: # If there is a single part, just show the simple status
1052: if ($resource->singlepart()) {
1053: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1054: $overallstatus{$status}++;
1055: $totalParts++;
1056: next;
1057: }
1058: # Now we can be sure the $part doesn't really matter.
1059: my $statusCount = $resource->simpleStatusCount();
1060: my @counts;
1061: foreach my $status (@statuses) {
1062: # decouple display order from the simpleStatusCount order
1063: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1064: if ($statusCount->[$slot]) {
1065: $overallstatus{$status}+=$statusCount->[$slot];
1066: $totalParts+=$statusCount->[$slot];
1067: }
1068: }
1069: }
1070: $return.= $td . $totalParts . ' parts: ';
1071: foreach my $status (@statuses) {
1072: if ($overallstatus{$status}) {
1073: $return.="<font color='" . $statusColors{$status} .
1074: "'>" . $overallstatus{$status} . ' '
1.225 bowersj2 1075: . $statusStrings{$status} . "</font>";
1076: }
1077: }
1.256 albertel 1078: $return.= $endtd;
1079: return $return;
1.225 bowersj2 1080: }
1081:
1.133 bowersj2 1082: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1083: \&render_quick_status, \&render_long_status,
1084: \&render_parts_summary_status);
1.132 bowersj2 1085:
1086: sub setDefault {
1087: my ($val, $default) = @_;
1088: if (!defined($val)) { return $default; }
1089: return $val;
1090: }
1091:
1.296 albertel 1092: sub cmp_title {
1093: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1094: $atitle=~s/^\s*//;
1095: $btitle=~s/^\s*//;
1096: return $atitle cmp $btitle;
1097: }
1098:
1.132 bowersj2 1099: sub render {
1100: my $args = shift;
1.140 bowersj2 1101: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1102: my $result = '';
1.132 bowersj2 1103: # Configure the renderer.
1104: my $cols = $args->{'cols'};
1105: if (!defined($cols)) {
1106: # no columns, no nav maps.
1107: return '';
1108: }
1.140 bowersj2 1109: my $navmap;
1110: if (defined($args->{'navmap'})) {
1111: $navmap = $args->{'navmap'};
1112: }
1113:
1.158 bowersj2 1114: my $r = $args->{'r'};
1.140 bowersj2 1115: my $queryString = $args->{'queryString'};
1.159 bowersj2 1116: my $jump = $args->{'jump'};
1.158 bowersj2 1117: my $here = $args->{'here'};
1.153 bowersj2 1118: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1119: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1120: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1121: # before the current resource when using #current
1122:
1123: # If we were passed 'here' information, we are not rendering
1124: # after a folder manipulation, and we were not passed an
1125: # iterator, make sure we open the folders to show the "here"
1126: # marker
1127: my $filterHash = {};
1128: # Figure out what we're not displaying
1.394 ! raeburn 1129: foreach my $item (split(/\,/, $env{"form.filter"})) {
! 1130: if ($item) {
! 1131: $filterHash->{$item} = "1";
1.140 bowersj2 1132: }
1133: }
1134:
1.191 bowersj2 1135: # Filter: Remember filter function and add our own filter: Refuse
1136: # to show hidden resources unless the user can see them.
1137: my $userCanSeeHidden = advancedUser();
1138: my $filterFunc = setDefault($args->{'filterFunc'},
1139: sub {return 1;});
1140: if (!$userCanSeeHidden) {
1141: # Without renaming the filterfunc, the server seems to go into
1142: # an infinite loop
1143: my $oldFilterFunc = $filterFunc;
1144: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1145: &$oldFilterFunc($res);};
1146: }
1147:
1.140 bowersj2 1148: my $condition = 0;
1.320 albertel 1149: if ($env{'form.condition'}) {
1.140 bowersj2 1150: $condition = 1;
1151: }
1152:
1.320 albertel 1153: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1.140 bowersj2 1154: # Step 1: Check to see if we have a navmap
1155: if (!defined($navmap)) {
1.221 bowersj2 1156: $navmap = Apache::lonnavmaps::navmap->new();
1.340 albertel 1157: if (!defined($navmap)) {
1158: # no londer in course
1.388 albertel 1159: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1.362 www 1160: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1.340 albertel 1161: }
1162: }
1.140 bowersj2 1163:
1164: # Step two: Locate what kind of here marker is necessary
1165: # Determine where the "here" marker is and where the screen jumps to.
1166:
1.332 albertel 1167: if ($env{'form.postsymb'} ne '') {
1.320 albertel 1168: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1.332 albertel 1169: } elsif ($env{'form.postdata'} ne '') {
1.140 bowersj2 1170: # couldn't find a symb, is there a URL?
1.320 albertel 1171: my $currenturl = $env{'form.postdata'};
1.158 bowersj2 1172: #$currenturl=~s/^http\:\/\///;
1173: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1174:
1.158 bowersj2 1175: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.331 albertel 1176: }
1177: if ($here eq '') {
1.317 albertel 1178: my $last;
1.320 albertel 1179: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1.317 albertel 1180: &GDBM_READER(),0640)) {
1181: $last=$hash{'last_known'};
1182: untie(%hash);
1183: }
1184: if ($last) { $here = $jump = $last; }
1185: }
1.158 bowersj2 1186:
1.140 bowersj2 1187: # Step three: Ensure the folders are open
1188: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1189: my $curRes;
1.140 bowersj2 1190: my $found = 0;
1191:
1192: # We only need to do this if we need to open the maps to show the
1193: # current position. This will change the counter so we can't count
1194: # for the jump marker with this loop.
1.294 albertel 1195: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1196: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1197: my $mapStack = $mapIterator->getStack();
1198:
1199: # Ensure the parent maps are open
1200: for my $map (@{$mapStack}) {
1201: if ($condition) {
1202: undef $filterHash->{$map->map_pc()};
1203: } else {
1204: $filterHash->{$map->map_pc()} = 1;
1205: }
1206: }
1207: $found = 1;
1208: }
1209: }
1.159 bowersj2 1210: }
1.140 bowersj2 1211:
1.320 albertel 1212: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1.140 bowersj2 1213: # If this is a click on a folder or something, we want to preserve the "here"
1214: # from the querystring, and get the new "jump" marker
1.320 albertel 1215: $here = $env{'form.here'};
1216: $jump = $env{'form.jump'};
1.140 bowersj2 1217: }
1218:
1.132 bowersj2 1219: my $it = $args->{'iterator'};
1220: if (!defined($it)) {
1.320 albertel 1221: # Construct a default iterator based on $env{'form.'} information
1.140 bowersj2 1222:
1223: # Step 1: Check to see if we have a navmap
1224: if (!defined($navmap)) {
1.221 bowersj2 1225: $navmap = Apache::lonnavmaps::navmap->new();
1.140 bowersj2 1226: }
1227:
1.144 bowersj2 1228: # See if we're being passed a specific map
1229: if ($args->{'iterator_map'}) {
1230: my $map = $args->{'iterator_map'};
1.145 bowersj2 1231: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1232: my $firstResource = $map->map_start();
1233: my $finishResource = $map->map_finish();
1234:
1235: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1236: } else {
1237: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);
1238: }
1.132 bowersj2 1239: }
1.256 albertel 1240:
1.159 bowersj2 1241: # (re-)Locate the jump point, if any
1.191 bowersj2 1242: # Note this does not take filtering or hidden into account... need
1243: # to be fixed?
1.159 bowersj2 1244: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1245: my $curRes;
1.159 bowersj2 1246: my $foundJump = 0;
1247: my $counter = 0;
1248:
1.222 bowersj2 1249: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1250: if (ref($curRes)) { $counter++; }
1251:
1252: if (ref($curRes) && $jump eq $curRes->symb()) {
1253:
1254: # This is why we have to use the main iterator instead of the
1255: # potentially faster DFS: The count has to be the same, so
1256: # the order has to be the same, which DFS won't give us.
1257: $args->{'currentJumpIndex'} = $counter;
1258: $foundJump = 1;
1259: }
1260: }
1261:
1.132 bowersj2 1262: my $showParts = setDefault($args->{'showParts'}, 1);
1263: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1264: # keeps track of when the current resource is found,
1265: # so we can back up a few and put the anchor above the
1266: # current resource
1.140 bowersj2 1267: my $printKey = $args->{'printKey'};
1268: my $printCloseAll = $args->{'printCloseAll'};
1269: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.298 albertel 1270:
1.140 bowersj2 1271: # Print key?
1272: if ($printKey) {
1273: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1274: my $date=localtime;
1275: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1.298 albertel 1276: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.140 bowersj2 1277: if ($navmap->{LAST_CHECK}) {
1278: $result .=
1.298 albertel 1279: '<img src="'.$location.'/chat.gif"> '.&mt('New discussion since').' '.
1.140 bowersj2 1280: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1281: '</td><td align="center" valign="bottom"> '.
1.298 albertel 1282: '<img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1283: '</td>';
1284: } else {
1285: $result .= '<td align="center" valign="bottom"> '.
1.298 albertel 1286: '<img src="'.$location.'/chat.gif"> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1287: ' <img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').
1.140 bowersj2 1288: '</td>';
1289: }
1290:
1291: $result .= '</tr></table>';
1292: }
1293:
1.172 bowersj2 1294: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1295: my ($link,$text);
1.140 bowersj2 1296: if ($condition) {
1.392 albertel 1297: $link='"navmaps?condition=0&filter=&'.$queryString.
1.384 www 1298: '&here='.&escape($here).'"';
1.377 www 1299: $text='Close all folders';
1.140 bowersj2 1300: } else {
1.392 albertel 1301: $link='"navmaps?condition=1&filter=&'.$queryString.
1.384 www 1302: '&here='.&escape($here).'"';
1.377 www 1303: $text='Open all folders';
1.281 albertel 1304: }
1305: if ($args->{'caller'} eq 'navmapsdisplay') {
1306: &add_linkitem($args->{'linkitems'},'changefolder',
1307: 'location.href='.$link,$text);
1308: } else {
1309: $result.='<a href='.$link.'>'.&mt($text).'</a>';
1310: }
1.266 raeburn 1311: $result .= "\n";
1312: }
1.140 bowersj2 1313:
1.266 raeburn 1314: # Check for any unread discussions in all resources.
1.281 albertel 1315: if ($args->{'caller'} eq 'navmapsdisplay') {
1.296 albertel 1316: &add_linkitem($args->{'linkitems'},'clearbubbles',
1317: 'document.clearbubbles.submit()',
1318: 'Mark all posts read');
1.297 albertel 1319: my $time=time;
1.296 albertel 1320: $result .= (<<END);
1321: <form name="clearbubbles" method="post" action="/adm/feedback">
1322: <input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
1.297 albertel 1323: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1324: END
1325: if ($args->{'sort'} eq 'discussion') {
1326: my $totdisc = 0;
1327: my $haveDisc = '';
1328: my @allres=$navmap->retrieveResources();
1329: foreach my $resource (@allres) {
1330: if ($resource->hasDiscussion()) {
1.323 albertel 1331: $haveDisc .= $resource->wrap_symb().':';
1.296 albertel 1332: $totdisc ++;
1.267 albertel 1333: }
1334: }
1.296 albertel 1335: if ($totdisc > 0) {
1336: $haveDisc =~ s/:$//;
1337: $result .= (<<END);
1338: <input type="hidden" name="navmaps" value="$haveDisc" />
1339: </form>
1340: END
1341: }
1.297 albertel 1342: }
1343: $result.='</form>';
1.266 raeburn 1344: }
1.276 albertel 1345:
1.281 albertel 1346: if ($args->{'caller'} eq 'navmapsdisplay') {
1.283 raeburn 1347: $result .= '<table><tr><td>'.
1.388 albertel 1348: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',undef,'RAT').'</td>';
1.320 albertel 1349: if ($env{'environment.remotenavmap'} ne 'on') {
1.283 raeburn 1350: $result .= '<td> </td>';
1351: } else {
1352: $result .= '</tr><tr>';
1353: }
1.281 albertel 1354: $result.=&show_linkitems($args->{'linkitems'});
1355: if ($args->{'sort_html'}) {
1.320 albertel 1356: if ($env{'environment.remotenavmap'} ne 'on') {
1.281 albertel 1357: $result.='<td> </td><td> </td><td> </td>'.
1358: '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
1359: } else {
1360: $result.='</tr><tr><td align="left"><br />'.
1361: $args->{'sort_html'}.'</td></tr>';
1362: }
1363: }
1364: $result .= '</table>';
1365: } elsif ($args->{'sort_html'}) {
1366: $result.=$args->{'sort_html'};
1367: }
1.276 albertel 1368:
1.266 raeburn 1369: $result .= "<br />\n";
1.140 bowersj2 1370: if ($r) {
1371: $r->print($result);
1372: $r->rflush();
1373: $result = "";
1374: }
1.132 bowersj2 1375: # End parameter setting
1.133 bowersj2 1376:
1.132 bowersj2 1377: # Data
1.140 bowersj2 1378: $result .= '<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n";
1.132 bowersj2 1379: my $res = "Apache::lonnavmaps::resource";
1380: my %condenseStatuses =
1381: ( $res->NETWORK_FAILURE => 1,
1382: $res->NOTHING_SET => 1,
1383: $res->CORRECT => 1 );
1384: my @backgroundColors = ("#FFFFFF", "#F6F6F6");
1.133 bowersj2 1385:
1386: # Shared variables
1387: $args->{'counter'} = 0; # counts the rows
1388: $args->{'indentLevel'} = 0;
1389: $args->{'isNewBranch'} = 0;
1390: $args->{'condensed'} = 0;
1.298 albertel 1391: my $location=
1392: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace1.gif");
1.329 albertel 1393: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' width='25' height='1' alt=' ' border='0' />");
1.133 bowersj2 1394: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1395:
1.190 bowersj2 1396: # If we're suppressing empty sequences, look for them here. Use DFS for speed,
1397: # since structure actually doesn't matter, except what map has what resources.
1398: if ($args->{'suppressEmptySequences'}) {
1399: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1400: $it->{FIRST_RESOURCE},
1401: $it->{FINISH_RESOURCE},
1402: {}, undef, 1);
1.222 bowersj2 1403: my $depth = 0;
1.190 bowersj2 1404: $dfsit->next();
1405: my $curRes = $dfsit->next();
1406: while ($depth > -1) {
1407: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1408: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1409:
1410: if (ref($curRes)) {
1411: # Parallel pre-processing: Do sequences have non-filtered-out children?
1.201 bowersj2 1412: if ($curRes->is_map()) {
1.190 bowersj2 1413: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1414: # Sequences themselves do not count as visible children,
1415: # unless those sequences also have visible children.
1416: # This means if a sequence appears, there's a "promise"
1417: # that there's something under it if you open it, somewhere.
1418: } else {
1419: # Not a sequence: if it's filtered, ignore it, otherwise
1420: # rise up the stack and mark the sequences as having children
1421: if (&$filterFunc($curRes)) {
1422: for my $sequence (@{$dfsit->getStack()}) {
1423: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1424: }
1425: }
1426: }
1427: }
1428: } continue {
1429: $curRes = $dfsit->next();
1430: }
1431: }
1432:
1.133 bowersj2 1433: my $displayedJumpMarker = 0;
1.132 bowersj2 1434: # Set up iteration.
1435: my $now = time();
1436: my $in24Hours = $now + 24 * 60 * 60;
1437: my $rownum = 0;
1438:
1.141 bowersj2 1439: # export "here" marker information
1440: $args->{'here'} = $here;
1441:
1.222 bowersj2 1442: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1443: my @resources;
1444: my $code='';# sub { !(shift->is_map();) };
1445: if ($args->{'sort'} eq 'title') {
1.276 albertel 1446: my $oldFilterFunc = $filterFunc;
1447: my $filterFunc=
1448: sub {
1449: my ($res)=@_;
1450: if ($res->is_map()) { return 0;}
1451: return &$oldFilterFunc($res);
1452: };
1453: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1454: @resources= sort { &cmp_title($a,$b) } @resources;
1455: } elsif ($args->{'sort'} eq 'duedate') {
1456: my $oldFilterFunc = $filterFunc;
1457: my $filterFunc=
1458: sub {
1459: my ($res)=@_;
1460: if (!$res->is_problem()) { return 0;}
1461: return &$oldFilterFunc($res);
1462: };
1463: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1464: @resources= sort {
1.270 albertel 1465: if ($a->duedate ne $b->duedate) {
1466: return $a->duedate cmp $b->duedate;
1467: }
1.296 albertel 1468: my $value=&cmp_title($a,$b);
1469: return $value;
1.270 albertel 1470: } @resources;
1.296 albertel 1471: } elsif ($args->{'sort'} eq 'discussion') {
1472: my $oldFilterFunc = $filterFunc;
1473: my $filterFunc=
1474: sub {
1475: my ($res)=@_;
1476: if (!$res->hasDiscussion() &&
1477: !$res->getFeedback() &&
1478: !$res->getErrors()) { return 0;}
1479: return &$oldFilterFunc($res);
1480: };
1481: @resources=$navmap->retrieveResources(undef,$filterFunc);
1482: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1483: } else {
1484: #unknow sort mechanism or default
1485: undef($args->{'sort'});
1.270 albertel 1486: }
1487:
1.276 albertel 1488:
1.270 albertel 1489: while (1) {
1490: if ($args->{'sort'}) {
1491: $curRes = shift(@resources);
1492: } else {
1493: $curRes = $it->next($closeAllPages);
1494: }
1495: if (!$curRes) { last; }
1496:
1.132 bowersj2 1497: # Maintain indentation level.
1498: if ($curRes == $it->BEGIN_MAP() ||
1499: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1500: $args->{'indentLevel'}++;
1.132 bowersj2 1501: }
1502: if ($curRes == $it->END_MAP() ||
1503: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1504: $args->{'indentLevel'}--;
1.132 bowersj2 1505: }
1506: # Notice new branches
1507: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1508: $args->{'isNewBranch'} = 1;
1509: }
1510:
1511: # If this isn't an actual resource, continue on
1512: if (!ref($curRes)) {
1513: next;
1.132 bowersj2 1514: }
1.133 bowersj2 1515:
1.143 bowersj2 1516: # If this has been filtered out, continue on
1517: if (!(&$filterFunc($curRes))) {
1518: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1519: next;
1520: }
1.132 bowersj2 1521:
1.190 bowersj2 1522: # If this is an empty sequence and we're filtering them, continue on
1.201 bowersj2 1523: if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&
1.190 bowersj2 1524: !$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {
1525: next;
1526: }
1527:
1.153 bowersj2 1528: # If we're suppressing navmaps and this is a navmap, continue on
1529: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1530: next;
1531: }
1532:
1.191 bowersj2 1533: $args->{'counter'}++;
1534:
1.132 bowersj2 1535: # Does it have multiple parts?
1.133 bowersj2 1536: $args->{'multipart'} = 0;
1537: $args->{'condensed'} = 0;
1.132 bowersj2 1538: my @parts;
1539:
1540: # Decide what parts to show.
1.133 bowersj2 1541: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1542: @parts = @{$curRes->parts()};
1.192 bowersj2 1543: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1544:
1545: if ($condenseParts) { # do the condensation
1.133 bowersj2 1546: if (!$args->{'condensed'}) {
1.132 bowersj2 1547: # Decide whether to condense based on similarity
1.192 bowersj2 1548: my $status = $curRes->status($parts[0]);
1549: my $due = $curRes->duedate($parts[0]);
1550: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1551: my $statusAllSame = 1;
1552: my $dueAllSame = 1;
1553: my $openAllSame = 1;
1.192 bowersj2 1554: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1555: if ($curRes->status($parts[$i]) != $status){
1556: $statusAllSame = 0;
1557: }
1558: if ($curRes->duedate($parts[$i]) != $due ) {
1559: $dueAllSame = 0;
1560: }
1561: if ($curRes->opendate($parts[$i]) != $open) {
1562: $openAllSame = 0;
1563: }
1564: }
1565: # $*allSame is true if all the statuses were
1566: # the same. Now, if they are all the same and
1567: # match one of the statuses to condense, or they
1568: # are all open with the same due date, or they are
1569: # all OPEN_LATER with the same open date, display the
1570: # status of the first non-zero part (to get the 'correct'
1571: # status right, since 0 is never 'correct' or 'open').
1572: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1573: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1574: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1575: @parts = ($parts[0]);
1.133 bowersj2 1576: $args->{'condensed'} = 1;
1.132 bowersj2 1577: }
1578: }
1.198 bowersj2 1579: # Multipart problem with one part: always "condense" (happens
1580: # to match the desirable behavior)
1581: if ($curRes->countParts() == 1) {
1582: @parts = ($parts[0]);
1583: $args->{'condensed'} = 1;
1584: }
1.132 bowersj2 1585: }
1.157 bowersj2 1586: }
1.132 bowersj2 1587:
1588: # If the multipart problem was condensed, "forget" it was multipart
1589: if (scalar(@parts) == 1) {
1.133 bowersj2 1590: $args->{'multipart'} = 0;
1.192 bowersj2 1591: } else {
1592: # Add part 0 so we display it correctly.
1593: unshift @parts, '0';
1.132 bowersj2 1594: }
1.310 albertel 1595:
1596: {
1597: my ($src,$symb,$anchor,$stack);
1598: if ($args->{'sort'}) {
1599: my $it = $navmap->getIterator(undef, undef, undef, 1);
1600: while ( my $res=$it->next()) {
1601: if (ref($res) &&
1602: $res->symb() eq $curRes->symb()) { last; }
1603: }
1604: $stack=$it->getStack();
1605: } else {
1606: $stack=$it->getStack();
1607: }
1608: ($src,$symb,$anchor)=getLinkForResource($stack);
1609: if (defined($anchor)) { $anchor='#'.$anchor; }
1610: my $srcHasQuestion = $src =~ /\?/;
1611: $args->{"resourceLink"} = $src.
1612: ($srcHasQuestion?'&':'?') .
1.384 www 1613: 'symb=' . &escape($symb).$anchor;
1.310 albertel 1614: }
1.132 bowersj2 1615: # Now, we've decided what parts to show. Loop through them and
1616: # show them.
1.192 bowersj2 1617: foreach my $part (@parts) {
1.132 bowersj2 1618: $rownum ++;
1619: my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];
1620:
1621: $result .= " <tr bgcolor='$backgroundColor'>\n";
1.134 bowersj2 1622:
1623: # Set up some data about the parts that the cols might want
1624: my $filter = $it->{FILTER};
1.270 albertel 1625:
1.132 bowersj2 1626: # Now, display each column.
1627: foreach my $col (@$cols) {
1.139 bowersj2 1628: my $colHTML = '';
1629: if (ref($col)) {
1630: $colHTML .= &$col($curRes, $part, $args);
1631: } else {
1632: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1633: }
1.132 bowersj2 1634:
1.133 bowersj2 1635: # If this is the first column and it's time to print
1636: # the anchor, do so
1637: if ($col == $cols->[0] &&
1638: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1639: $currentJumpDelta) {
1640: # Jam the anchor after the <td> tag;
1641: # necessary for valid HTML (which Mozilla requires)
1642: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1643: $displayedJumpMarker = 1;
1644: }
1.139 bowersj2 1645: $result .= $colHTML . "\n";
1.132 bowersj2 1646: }
1.139 bowersj2 1647: $result .= " </tr>\n";
1.140 bowersj2 1648: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1649: }
1.153 bowersj2 1650:
1.139 bowersj2 1651: if ($r && $rownum % 20 == 0) {
1652: $r->print($result);
1653: $result = "";
1654: $r->rflush();
1.132 bowersj2 1655: }
1.156 bowersj2 1656: } continue {
1.208 bowersj2 1657: if ($r) {
1658: # If we have the connection, make sure the user is still connected
1659: my $c = $r->connection;
1660: if ($c->aborted()) {
1661: # Who cares what we do, nobody will see it anyhow.
1662: return '';
1663: }
1664: }
1.132 bowersj2 1665: }
1666:
1.134 bowersj2 1667: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1668: # delay needed because the browser is processing the jump before
1669: # it finishes rendering, so it goes to the wrong place!
1670: # onload might be better, but this routine has no access to that.
1671: # On mozilla, the 0-millisecond timeout seems to prevent this;
1672: # it's quite likely this might fix other browsers, too, and
1673: # certainly won't hurt anything.
1.139 bowersj2 1674: if ($displayedJumpMarker) {
1.247 albertel 1675: $result .= "
1676: <script>
1677: if (location.href.indexOf('#curloc')==-1) {
1678: setTimeout(\"location += '#curloc';\", 0)
1679: }
1680: </script>";
1.134 bowersj2 1681: }
1682:
1.132 bowersj2 1683: $result .= "</table>";
1.140 bowersj2 1684:
1685: if ($r) {
1686: $r->print($result);
1687: $result = "";
1688: $r->rflush();
1689: }
1690:
1.132 bowersj2 1691: return $result;
1692: }
1693:
1.281 albertel 1694: sub add_linkitem {
1695: my ($linkitems,$name,$cmd,$text)=@_;
1696: $$linkitems{$name}{'cmd'}=$cmd;
1697: $$linkitems{$name}{'text'}=&mt($text);
1698: }
1699:
1700: sub show_linkitems {
1701: my ($linkitems)=@_;
1.312 albertel 1702: my @linkorder = ("blank","launchnav","closenav","firsthomework",
1703: "everything","uncompleted","changefolder","clearbubbles");
1.281 albertel 1704:
1705: my $result .= (<<ENDBLOCK);
1.283 raeburn 1706: <td align="left">
1.281 albertel 1707: <script type="text/javascript">
1708: function changeNavDisplay () {
1709: var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
1710: ENDBLOCK
1711: foreach my $link (@linkorder) {
1712: $result.= "if (navchoice == '$link') {".
1713: $linkitems->{$link}{'cmd'}."}\n";
1714: }
1715: $result.='}
1716: </script>
1717: <form name="linkitems" method="post">
1718: <nobr><select name="toplink">'."\n";
1719: foreach my $link (@linkorder) {
1720: if (defined($linkitems->{$link})) {
1721: if ($linkitems->{$link}{'text'} ne '') {
1722: $result .= ' <option value="'.$link.'">'.
1723: $linkitems->{$link}{'text'}."</option>\n";
1724: }
1725: }
1726: }
1727: $result .= '</select> <input type="button" name="chgnav"
1728: value="Go" onClick="javascript:changeNavDisplay()" />
1729: </nobr></form></td>'."\n";
1.298 albertel 1730:
1.281 albertel 1731: return $result;
1732: }
1733:
1.133 bowersj2 1734: 1;
1735:
1736: package Apache::lonnavmaps::navmap;
1737:
1738: =pod
1739:
1.216 bowersj2 1740: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 1741:
1.217 bowersj2 1742: =head2 Overview
1.133 bowersj2 1743:
1.217 bowersj2 1744: The navmap object's job is to provide access to the resources
1745: in the course as Apache::lonnavmaps::resource objects, and to
1746: query and manage the relationship between those resource objects.
1747:
1748: Generally, you'll use the navmap object in one of three basic ways.
1749: In order of increasing complexity and power:
1750:
1751: =over 4
1752:
1.358 albertel 1753: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
1.217 bowersj2 1754: various ways to obtain resource objects, based on various identifiers.
1755: Use this when you want to request information about one object or
1756: a handful of resources you already know the identities of, from some
1757: other source. For more about Ids, Symbs, and MapPcs, see the
1758: Resource documentation. Note that Url should be a B<last resort>,
1.358 albertel 1759: not your first choice; it only really works when there is only one
1.217 bowersj2 1760: instance of the resource in the course, which only applies to
1.358 albertel 1761: maps, and even that may change in the future (see the B<getResourceByUrl>
1762: documentation for more details.)
1.217 bowersj2 1763:
1764: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
1765: retrieves resources matching some criterion and returns them
1766: in a flat array, with no structure information. Use this when
1767: you are manipulating a series of resources, based on what map
1768: the are in, but do not care about branching, or exactly how
1769: the maps and resources are related. This is the most common case.
1770:
1771: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
1772: the course's navmap in various ways without writing the traversal
1773: code yourself. See iterator documentation below. Use this when
1774: you need to know absolutely everything about the course, including
1775: branches and the precise relationship between maps and resources.
1776:
1777: =back
1778:
1779: =head2 Creation And Destruction
1780:
1781: To create a navmap object, use the following function:
1.133 bowersj2 1782:
1783: =over 4
1784:
1.221 bowersj2 1785: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 1786:
1.221 bowersj2 1787: Creates a new navmap object. Returns the navmap object if this is
1788: successful, or B<undef> if not.
1.174 albertel 1789:
1.216 bowersj2 1790: =back
1791:
1792: =head2 Methods
1793:
1794: =over 4
1795:
1.174 albertel 1796: =item * B<getIterator>(first, finish, filter, condition):
1797:
1798: See iterator documentation below.
1.133 bowersj2 1799:
1800: =cut
1801:
1802: use strict;
1803: use GDBM_File;
1.320 albertel 1804: use Apache::lonnet;
1.133 bowersj2 1805:
1806: sub new {
1807: # magic invocation to create a class instance
1808: my $proto = shift;
1809: my $class = ref($proto) || $proto;
1810: my $self = {};
1811:
1812: # Resource cache stores navmap resources as we reference them. We generate
1813: # them on-demand so we don't pay for creating resources unless we use them.
1814: $self->{RESOURCE_CACHE} = {};
1815:
1816: # Network failure flag, if we accessed the course or user opt and
1817: # failed
1818: $self->{NETWORK_FAILURE} = 0;
1819:
1820: # tie the nav hash
1821:
1.168 bowersj2 1822: my %navmaphash;
1823: my %parmhash;
1.320 albertel 1824: my $courseFn = $env{"request.course.fn"};
1.220 bowersj2 1825: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
1.133 bowersj2 1826: &GDBM_READER(), 0640))) {
1827: return undef;
1828: }
1829:
1.220 bowersj2 1830: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
1.133 bowersj2 1831: &GDBM_READER(), 0640)))
1832: {
1.170 matthew 1833: untie %{$self->{PARM_HASH}};
1.133 bowersj2 1834: return undef;
1835: }
1836:
1.199 bowersj2 1837: $self->{NAV_HASH} = \%navmaphash;
1.168 bowersj2 1838: $self->{PARM_HASH} = \%parmhash;
1.221 bowersj2 1839: $self->{PARM_CACHE} = {};
1.133 bowersj2 1840:
1841: bless($self);
1842:
1843: return $self;
1844: }
1845:
1.221 bowersj2 1846: sub generate_course_user_opt {
1.133 bowersj2 1847: my $self = shift;
1.221 bowersj2 1848: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 1849:
1.320 albertel 1850: my $uname=$env{'user.name'};
1851: my $udom=$env{'user.domain'};
1852: my $cid=$env{'request.course.id'};
1.326 albertel 1853: my $cdom=$env{'course.'.$cid.'.domain'};
1854: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 1855:
1.133 bowersj2 1856: # ------------------------------------------------- Get coursedata (if present)
1.326 albertel 1857: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
1858: # Check for network failure
1859: if (!ref($courseopt)) {
1860: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
1.324 albertel 1861: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 1862: }
1.326 albertel 1863: undef($courseopt);
1864: }
1.325 albertel 1865:
1.133 bowersj2 1866: # --------------------------------------------------- Get userdata (if present)
1.325 albertel 1867:
1.326 albertel 1868: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
1869: # Check for network failure
1870: if (!ref($useropt)) {
1871: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
1.324 albertel 1872: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 1873: }
1.326 albertel 1874: undef($useropt);
1.221 bowersj2 1875: }
1876:
1.326 albertel 1877: $self->{COURSE_OPT} = $courseopt;
1878: $self->{USER_OPT} = $useropt;
1879:
1.221 bowersj2 1880: $self->{COURSE_USER_OPT_GENERATED} = 1;
1881:
1882: return;
1883: }
1884:
1885: sub generate_email_discuss_status {
1886: my $self = shift;
1.259 raeburn 1887: my $symb = shift;
1.221 bowersj2 1888: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 1889:
1.320 albertel 1890: my $cid=$env{'request.course.id'};
1.326 albertel 1891: my $cdom=$env{'course.'.$cid.'.domain'};
1892: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 1893:
1894: my %emailstatus = &Apache::lonnet::dump('email_status');
1895: my $logoutTime = $emailstatus{'logout'};
1.320 albertel 1896: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
1.221 bowersj2 1897: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
1898: $courseLeaveTime : $logoutTime);
1899: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
1900: $cdom, $cnum);
1.259 raeburn 1901: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
1.320 albertel 1902: $env{'user.domain'},$env{'user.name'},'lastread');
1.259 raeburn 1903: my %lastreadtime = ();
1.394 ! raeburn 1904: foreach my $key (keys %lastread) {
! 1905: my $shortkey = $key;
! 1906: $shortkey =~ s/_lastread$//;
! 1907: $lastreadtime{$shortkey} = $lastread{$key};
1.259 raeburn 1908: }
1909:
1.221 bowersj2 1910: my %feedback=();
1911: my %error=();
1.325 albertel 1912: my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},
1913: $env{'user.name'});
1.221 bowersj2 1914:
1.325 albertel 1915: foreach my $msgid (@keys) {
1.295 albertel 1916: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
1917: my $plain=
1.384 www 1918: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
1.351 www 1919: if ($plain=~/ \[([^\]]+)\]\:/) {
1920: my $url=$1;
1921: if ($plain=~/\:Error \[/) {
1.221 bowersj2 1922: $error{$url}.=','.$msgid;
1923: } else {
1924: $feedback{$url}.=','.$msgid;
1925: }
1926: }
1927: }
1.211 bowersj2 1928: }
1.221 bowersj2 1929:
1.295 albertel 1930: #url's of resources that have feedbacks
1.221 bowersj2 1931: $self->{FEEDBACK} = \%feedback;
1.295 albertel 1932: #or errors
1933: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 1934: $self->{DISCUSSION_TIME} = \%discussiontime;
1935: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 1936: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 1937:
1938: $self->{EMAIL_DISCUSS_GENERATED} = 1;
1939: }
1940:
1941: sub get_user_data {
1942: my $self = shift;
1943: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 1944:
1.221 bowersj2 1945: # Retrieve performance data on problems
1.320 albertel 1946: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
1947: $env{'user.domain'},
1948: $env{'user.name'});
1.221 bowersj2 1949: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 1950:
1.221 bowersj2 1951: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 1952: }
1953:
1.354 raeburn 1954: sub get_discussion_data {
1955: my $self = shift;
1956: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
1.366 albertel 1957: return $self->{DISCUSSION_DATA};
1.354 raeburn 1958: }
1.366 albertel 1959:
1960: $self->generate_email_discuss_status();
1961:
1.354 raeburn 1962: my $cid=$env{'request.course.id'};
1963: my $cdom=$env{'course.'.$cid.'.domain'};
1964: my $cnum=$env{'course.'.$cid.'.num'};
1965: # Retrieve discussion data for resources in course
1.367 albertel 1966: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
1.366 albertel 1967:
1968:
1.354 raeburn 1969: $self->{DISCUSSION_DATA} = \%discussion_data;
1970: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
1971: return $self->{DISCUSSION_DATA};
1972: }
1973:
1974:
1.133 bowersj2 1975: # Internal function: Takes a key to look up in the nav hash and implements internal
1976: # memory caching of that key.
1977: sub navhash {
1978: my $self = shift; my $key = shift;
1979: return $self->{NAV_HASH}->{$key};
1980: }
1981:
1.217 bowersj2 1982: =pod
1983:
1984: =item * B<courseMapDefined>(): Returns true if the course map is defined,
1985: false otherwise. Undefined course maps indicate an error somewhere in
1986: LON-CAPA, and you will not be able to proceed with using the navmap.
1987: See the B<NAV> screen for an example of using this.
1988:
1989: =cut
1990:
1.133 bowersj2 1991: # Checks to see if coursemap is defined, matching test in old lonnavmaps
1992: sub courseMapDefined {
1993: my $self = shift;
1.320 albertel 1994: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
1.133 bowersj2 1995:
1996: my $firstres = $self->navhash("map_start_$uri");
1997: my $lastres = $self->navhash("map_finish_$uri");
1998: return $firstres && $lastres;
1999: }
2000:
2001: sub getIterator {
2002: my $self = shift;
2003: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.314 albertel 2004: shift, undef, shift,
2005: shift, shift);
1.133 bowersj2 2006: return $iterator;
2007: }
2008:
2009: # Private method: Does the given resource (as a symb string) have
2010: # current discussion? Returns 0 if chat/mail data not extracted.
2011: sub hasDiscussion {
2012: my $self = shift;
2013: my $symb = shift;
1.221 bowersj2 2014: $self->generate_email_discuss_status();
2015:
1.133 bowersj2 2016: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2017:
2018: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2019:
1.323 albertel 2020: # backward compatibility (bulletin boards used to be 'wrapped')
2021: my $ressymb = $self->wrap_symb($symb);
1.259 raeburn 2022: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2023: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2024: } else {
1.266 raeburn 2025: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2026: 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 2027: }
1.133 bowersj2 2028: }
2029:
1.366 albertel 2030: sub last_post_time {
2031: my $self = shift;
2032: my $symb = shift;
2033: my $ressymb = $self->wrap_symb($symb);
2034: return $self->{DISCUSSION_TIME}->{$ressymb};
2035: }
2036:
1.393 raeburn 2037: sub discussion_info {
1.366 albertel 2038: my $self = shift;
2039: my $symb = shift;
1.393 raeburn 2040: my $filter = shift;
1.366 albertel 2041:
2042: $self->get_discussion_data();
1.372 raeburn 2043:
1.366 albertel 2044: my $ressymb = $self->wrap_symb($symb);
1.372 raeburn 2045: # keys used to store bulletinboard postings use 'unwrapped' symb.
2046: my $discsymb = $self->unwrap_symb($ressymb);
2047: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
1.366 albertel 2048: if (!$version) { return; }
2049:
2050: my $prevread = $self->{LAST_READ}{$ressymb};
2051:
1.393 raeburn 2052: my $count = 0;
1.366 albertel 2053: my $hiddenflag = 0;
2054: my $deletedflag = 0;
1.393 raeburn 2055: my ($hidden,$deleted,%info);
1.366 albertel 2056:
2057: for (my $id=$version; $id>0; $id--) {
1.372 raeburn 2058: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
1.366 albertel 2059: my @keys=split(/:/,$vkeys);
2060: if (grep(/^hidden$/ ,@keys)) {
2061: if (!$hiddenflag) {
1.372 raeburn 2062: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
1.366 albertel 2063: $hiddenflag = 1;
2064: }
2065: } elsif (grep(/^deleted$/,@keys)) {
2066: if (!$deletedflag) {
1.372 raeburn 2067: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
1.366 albertel 2068: $deletedflag = 1;
2069: }
2070: } else {
1.393 raeburn 2071: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2072: if ($filter eq 'unread') {
2073: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2074: next;
2075: }
2076: }
2077: $count++;
2078: $info{$count}{'subject'} =
2079: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2080: $info{$count}{'id'} = $id;
2081: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2082: }
1.366 albertel 2083: }
2084: }
2085: if (wantarray) {
1.393 raeburn 2086: return ($count,%info);
1.366 albertel 2087: }
1.393 raeburn 2088: return $count;
1.366 albertel 2089: }
2090:
1.321 raeburn 2091: sub wrap_symb {
1.322 albertel 2092: my $self = shift;
1.321 raeburn 2093: my $symb = shift;
1.373 albertel 2094: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
1.322 albertel 2095: unless ($symb =~ m|adm/wrapper/adm|) {
2096: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
1.321 raeburn 2097: }
2098: }
1.322 albertel 2099: return $symb;
1.321 raeburn 2100: }
2101:
1.372 raeburn 2102: sub unwrap_symb {
2103: my $self = shift;
2104: my $ressymb = shift;
2105: my $discsymb = $ressymb;
1.373 albertel 2106: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
1.372 raeburn 2107: $discsymb = $1.$2;
2108: }
2109: return $discsymb;
2110: }
2111:
1.322 albertel 2112: # Private method: Does the given resource (as a symb string) have
2113: # current feedback? Returns the string in the feedback hash, which
2114: # will be false if it does not exist.
2115:
1.133 bowersj2 2116: sub getFeedback {
2117: my $self = shift;
2118: my $symb = shift;
2119:
1.221 bowersj2 2120: $self->generate_email_discuss_status();
2121:
1.133 bowersj2 2122: if (!defined($self->{FEEDBACK})) { return ""; }
2123:
2124: return $self->{FEEDBACK}->{$symb};
2125: }
2126:
2127: # Private method: Get the errors for that resource (by source).
2128: sub getErrors {
2129: my $self = shift;
2130: my $src = shift;
1.221 bowersj2 2131:
2132: $self->generate_email_discuss_status();
2133:
1.133 bowersj2 2134: if (!defined($self->{ERROR_MSG})) { return ""; }
2135: return $self->{ERROR_MSG}->{$src};
2136: }
2137:
2138: =pod
2139:
1.174 albertel 2140: =item * B<getById>(id):
2141:
2142: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2143: object for that resource. This method, or other methods that use it
2144: (as in the resource object) is the only proper way to obtain a
2145: resource object.
1.133 bowersj2 2146:
1.194 bowersj2 2147: =item * B<getBySymb>(symb):
2148:
2149: Based on the symb of the resource, get a resource object for that
2150: resource. This is one of the proper ways to get a resource object.
2151:
2152: =item * B<getMapByMapPc>(map_pc):
2153:
2154: Based on the map_pc of the resource, get a resource object for
2155: the given map. This is one of the proper ways to get a resource object.
2156:
1.133 bowersj2 2157: =cut
2158:
2159: # The strategy here is to cache the resource objects, and only construct them
2160: # as we use them. The real point is to prevent reading any more from the tied
2161: # hash then we have to, which should hopefully alleviate speed problems.
2162:
2163: sub getById {
2164: my $self = shift;
2165: my $id = shift;
2166:
2167: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2168: {
2169: return $self->{RESOURCE_CACHE}->{$id};
2170: }
2171:
2172: # resource handles inserting itself into cache.
2173: # Not clear why the quotes are necessary, but as of this
2174: # writing it doesn't work without them.
2175: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2176: }
1.133 bowersj2 2177:
1.172 bowersj2 2178: sub getBySymb {
2179: my $self = shift;
2180: my $symb = shift;
1.277 matthew 2181:
1.228 albertel 2182: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2183: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2184: my $returnvalue = undef;
2185: if (ref($map)) {
2186: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2187: }
2188: return $returnvalue;
1.194 bowersj2 2189: }
2190:
2191: sub getByMapPc {
2192: my $self = shift;
2193: my $map_pc = shift;
2194: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2195: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2196: return $self->getById($map_id);
1.172 bowersj2 2197: }
2198:
1.133 bowersj2 2199: =pod
2200:
1.174 albertel 2201: =item * B<firstResource>():
2202:
2203: Returns a resource object reference corresponding to the first
2204: resource in the navmap.
1.133 bowersj2 2205:
2206: =cut
2207:
2208: sub firstResource {
2209: my $self = shift;
2210: my $firstResource = $self->navhash('map_start_' .
1.320 albertel 2211: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2212: return $self->getById($firstResource);
1.132 bowersj2 2213: }
1.133 bowersj2 2214:
2215: =pod
2216:
1.174 albertel 2217: =item * B<finishResource>():
2218:
2219: Returns a resource object reference corresponding to the last resource
2220: in the navmap.
1.133 bowersj2 2221:
2222: =cut
2223:
2224: sub finishResource {
2225: my $self = shift;
2226: my $firstResource = $self->navhash('map_finish_' .
1.320 albertel 2227: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2228: return $self->getById($firstResource);
1.132 bowersj2 2229: }
1.133 bowersj2 2230:
2231: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2232: # the actual lookup; parmval caches the results.
2233: sub parmval {
2234: my $self = shift;
2235: my ($what,$symb)=@_;
2236: my $hashkey = $what."|||".$symb;
2237:
2238: if (defined($self->{PARM_CACHE}->{$hashkey})) {
2239: return $self->{PARM_CACHE}->{$hashkey};
2240: }
2241:
2242: my $result = $self->parmval_real($what, $symb);
2243: $self->{PARM_CACHE}->{$hashkey} = $result;
2244: return $result;
1.132 bowersj2 2245: }
2246:
1.133 bowersj2 2247: sub parmval_real {
2248: my $self = shift;
1.219 albertel 2249: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2250:
1.221 bowersj2 2251: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2252: $self->generate_course_user_opt();
2253:
1.320 albertel 2254: my $cid=$env{'request.course.id'};
2255: my $csec=$env{'request.course.sec'};
1.350 raeburn 2256: my $cgroup='';
2257: my @cgrps=split(/:/,$env{'request.course.groups'});
2258: if (@cgrps > 0) {
2259: @cgrps = sort(@cgrps);
2260: $cgroup = $cgrps[0];
2261: }
1.320 albertel 2262: my $uname=$env{'user.name'};
2263: my $udom=$env{'user.domain'};
1.133 bowersj2 2264:
2265: unless ($symb) { return ''; }
2266: my $result='';
2267:
1.226 www 2268: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.383 albertel 2269: $mapname = &Apache::lonnet::deversion($mapname);
1.133 bowersj2 2270: # ----------------------------------------------------- Cascading lookup scheme
2271: my $rwhat=$what;
2272: $what=~s/^parameter\_//;
2273: $what=~s/\_/\./;
2274:
2275: my $symbparm=$symb.'.'.$what;
2276: my $mapparm=$mapname.'___(all).'.$what;
1.325 albertel 2277: my $usercourseprefix=$cid;
1.133 bowersj2 2278:
1.350 raeburn 2279: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2280: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
2281: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2282:
1.133 bowersj2 2283: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2284: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2285: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2286:
2287: my $courselevel= $usercourseprefix.'.'.$what;
2288: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2289: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2290:
2291: my $useropt = $self->{USER_OPT};
2292: my $courseopt = $self->{COURSE_OPT};
2293: my $parmhash = $self->{PARM_HASH};
2294:
2295: # ---------------------------------------------------------- first, check user
2296: if ($uname and defined($useropt)) {
2297: if (defined($$useropt{$courselevelr})) { return $$useropt{$courselevelr}; }
2298: if (defined($$useropt{$courselevelm})) { return $$useropt{$courselevelm}; }
2299: if (defined($$useropt{$courselevel})) { return $$useropt{$courselevel}; }
2300: }
2301:
2302: # ------------------------------------------------------- second, check course
1.350 raeburn 2303: if ($cgroup ne '' and defined($courseopt)) {
2304: if (defined($$courseopt{$grplevelr})) { return $$courseopt{$grplevelr}; }
2305: if (defined($$courseopt{$grplevelm})) { return $$courseopt{$grplevelm}; }
2306: if (defined($$courseopt{$grplevel})) { return $$courseopt{$grplevel}; }
2307: }
2308:
1.133 bowersj2 2309: if ($csec and defined($courseopt)) {
2310: if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
2311: if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
2312: if (defined($$courseopt{$seclevel})) { return $$courseopt{$seclevel}; }
2313: }
2314:
2315: if (defined($courseopt)) {
2316: if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
2317: }
2318:
2319: # ----------------------------------------------------- third, check map parms
2320:
2321: my $thisparm=$$parmhash{$symbparm};
2322: if (defined($thisparm)) { return $thisparm; }
2323:
2324: # ----------------------------------------------------- fourth , check default
2325:
1.246 albertel 2326: my $meta_rwhat=$rwhat;
2327: $meta_rwhat=~s/\./_/g;
2328: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
2329: if (defined($default)) { return $default}
2330: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.133 bowersj2 2331: if (defined($default)) { return $default}
2332:
1.315 albertel 2333: # --------------------------------------------------- fifth, check more course
2334: if (defined($courseopt)) {
2335: if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
2336: if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
2337: }
2338:
2339: # --------------------------------------------------- sixth , cascade up parts
1.133 bowersj2 2340:
2341: my ($space,@qualifier)=split(/\./,$rwhat);
2342: my $qualifier=join('.',@qualifier);
2343: unless ($space eq '0') {
1.160 albertel 2344: my @parts=split(/_/,$space);
2345: my $id=pop(@parts);
2346: my $part=join('_',@parts);
2347: if ($part eq '') { $part='0'; }
1.219 albertel 2348: my $partgeneral=$self->parmval($part.".$qualifier",$symb,1);
1.160 albertel 2349: if (defined($partgeneral)) { return $partgeneral; }
1.133 bowersj2 2350: }
1.219 albertel 2351: if ($recurse) { return undef; }
2352: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);
2353: if (defined($pack_def)) { return $pack_def; }
1.133 bowersj2 2354: return '';
1.145 bowersj2 2355: }
2356:
1.174 albertel 2357: =pod
1.145 bowersj2 2358:
1.352 raeburn 2359: =item * B<getResourceByUrl>(url,multiple):
1.145 bowersj2 2360:
1.352 raeburn 2361: Retrieves a resource object by URL of the resource, unless the optional
2362: multiple parameter is included in wahich caes an array of resource
2363: objects is returned. If passed a resource object, it will simply return
2364: it, so it is safe to use this method in code like
2365: "$res = $navmap->getResourceByUrl($res)"
2366: if you're not sure if $res is already an object, or just a URL. If the
2367: resource appears multiple times in the course, only the first instance
2368: will be returned (useful for maps), unless the multiple parameter has
2369: been included, in which case all instances are returned in an array.
1.174 albertel 2370:
1.314 albertel 2371: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall):
1.174 albertel 2372:
2373: The map is a specification of a map to retreive the resources from,
2374: either as a url or as an object. The filterFunc is a reference to a
2375: function that takes a resource object as its one argument and returns
2376: true if the resource should be included, or false if it should not
2377: be. If recursive is true, the map will be recursively examined,
2378: otherwise it will not be. If bailout is true, the function will return
1.314 albertel 2379: as soon as it finds a resource, if false it will finish. If showall is
2380: true it will not hide maps that contain nothing but one other map. By
2381: default, the map is the top-level map of the course, filterFunc is a
2382: function that always returns 1, recursive is true, bailout is false,
2383: showall is false. The resources will be returned in a list containing
2384: the resource objects for the corresponding resources, with B<no
2385: structure information> in the list; regardless of branching,
2386: recursion, etc., it will be a flat list.
1.174 albertel 2387:
2388: Thus, this is suitable for cases where you don't want the structure,
2389: just a list of all resources. It is also suitable for finding out how
2390: many resources match a given description; for this use, if all you
2391: want to know is if I<any> resources match the description, the bailout
2392: parameter will allow you to avoid potentially expensive enumeration of
2393: all matching resources.
1.145 bowersj2 2394:
1.318 albertel 2395: =item * B<hasResource>(map, filterFunc, recursive, showall):
1.145 bowersj2 2396:
1.174 albertel 2397: Convience method for
1.146 bowersj2 2398:
1.318 albertel 2399: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
1.146 bowersj2 2400:
1.174 albertel 2401: which will tell whether the map has resources matching the description
2402: in the filter function.
1.146 bowersj2 2403:
1.352 raeburn 2404: =item * B<usedVersion>(url):
2405:
2406: Retrieves version infomation for a url. Returns the version (a number, or
2407: the string "mostrecent") for resources which have version information in
2408: the big hash.
2409:
1.145 bowersj2 2410: =cut
2411:
1.277 matthew 2412:
1.145 bowersj2 2413: sub getResourceByUrl {
2414: my $self = shift;
2415: my $resUrl = shift;
1.352 raeburn 2416: my $multiple = shift;
1.145 bowersj2 2417:
2418: if (ref($resUrl)) { return $resUrl; }
2419:
2420: $resUrl = &Apache::lonnet::clutter($resUrl);
2421: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
1.352 raeburn 2422: if (!$resId) { return ''; }
2423: if ($multiple) {
2424: my @resources = ();
2425: my @resIds = split (/,/, $resId);
2426: foreach my $id (@resIds) {
1.353 raeburn 2427: my $resourceId = $self->getById($id);
2428: if ($resourceId) {
2429: push(@resources,$resourceId);
1.352 raeburn 2430: }
2431: }
2432: return @resources;
2433: } else {
2434: if ($resId =~ /,/) {
2435: $resId = (split (/,/, $resId))[0];
2436: }
2437: return $self->getById($resId);
1.145 bowersj2 2438: }
2439: }
2440:
2441: sub retrieveResources {
2442: my $self = shift;
2443: my $map = shift;
2444: my $filterFunc = shift;
2445: if (!defined ($filterFunc)) {
2446: $filterFunc = sub {return 1;};
2447: }
2448: my $recursive = shift;
2449: if (!defined($recursive)) { $recursive = 1; }
2450: my $bailout = shift;
2451: if (!defined($bailout)) { $bailout = 0; }
1.314 albertel 2452: my $showall = shift;
1.145 bowersj2 2453: # Create the necessary iterator.
2454: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 2455: $map = $self->getResourceByUrl($map);
1.145 bowersj2 2456: }
2457:
1.213 bowersj2 2458: # If nothing was passed, assume top-level map
2459: if (!$map) {
2460: $map = $self->getById('0.0');
2461: }
2462:
1.145 bowersj2 2463: # Check the map's validity.
1.213 bowersj2 2464: if (!$map->is_map()) {
1.145 bowersj2 2465: # Oh, to throw an exception.... how I'd love that!
2466: return ();
2467: }
2468:
1.146 bowersj2 2469: # Get an iterator.
2470: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.314 albertel 2471: undef, $recursive, $showall);
1.146 bowersj2 2472:
2473: my @resources = ();
2474:
2475: # Run down the iterator and collect the resources.
1.222 bowersj2 2476: my $curRes;
2477:
2478: while ($curRes = $it->next()) {
1.146 bowersj2 2479: if (ref($curRes)) {
2480: if (!&$filterFunc($curRes)) {
2481: next;
2482: }
2483:
2484: push @resources, $curRes;
2485:
2486: if ($bailout) {
2487: return @resources;
2488: }
2489: }
2490:
2491: }
2492:
2493: return @resources;
2494: }
2495:
2496: sub hasResource {
2497: my $self = shift;
2498: my $map = shift;
2499: my $filterFunc = shift;
2500: my $recursive = shift;
1.318 albertel 2501: my $showall = shift;
1.146 bowersj2 2502:
1.318 albertel 2503: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
1.133 bowersj2 2504: }
1.51 bowersj2 2505:
1.352 raeburn 2506: sub usedVersion {
2507: my $self = shift;
2508: my $linkurl = shift;
2509: return $self->navhash("version_$linkurl");
2510: }
2511:
1.51 bowersj2 2512: 1;
2513:
2514: package Apache::lonnavmaps::iterator;
1.365 albertel 2515: use Scalar::Util qw(weaken);
1.320 albertel 2516: use Apache::lonnet;
2517:
1.51 bowersj2 2518: =pod
2519:
2520: =back
2521:
1.174 albertel 2522: =head1 Object: navmap Iterator
1.51 bowersj2 2523:
1.174 albertel 2524: An I<iterator> encapsulates the logic required to traverse a data
2525: structure. navmap uses an iterator to traverse the course map
2526: according to the criteria you wish to use.
2527:
2528: To obtain an iterator, call the B<getIterator>() function of a
2529: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
2530: directly.) This will return a reference to the iterator:
1.51 bowersj2 2531:
2532: C<my $resourceIterator = $navmap-E<gt>getIterator();>
2533:
2534: To get the next thing from the iterator, call B<next>:
2535:
2536: C<my $nextThing = $resourceIterator-E<gt>next()>
2537:
2538: getIterator behaves as follows:
2539:
2540: =over 4
2541:
1.174 albertel 2542: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
2543:
2544: All parameters are optional. firstResource is a resource reference
2545: corresponding to where the iterator should start. It defaults to
2546: navmap->firstResource() for the corresponding nav map. finishResource
2547: corresponds to where you want the iterator to end, defaulting to
2548: navmap->finishResource(). filterHash is a hash used as a set
2549: containing strings representing the resource IDs, defaulting to
2550: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 2551: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 2552: recursed on. If it is a 1, only resources NOT in the filterHash will
2553: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
2554: false (default), the iterator will only return the first level of map
2555: that is not just a single, 'redirecting' map. If true, the iterator
2556: will return all information, starting with the top-level map,
2557: regardless of content. returnTopMap, if true (default false), will
2558: cause the iterator to return the top-level map object (resource 0.0)
2559: before anything else.
2560:
2561: Thus, by default, only top-level resources will be shown. Change the
2562: condition to a 1 without changing the hash, and all resources will be
2563: shown. Changing the condition to 1 and including some values in the
2564: hash will allow you to selectively suppress parts of the navmap, while
2565: leaving it on 0 and adding things to the hash will allow you to
2566: selectively add parts of the nav map. See the handler code for
2567: examples.
2568:
2569: The iterator will return either a reference to a resource object, or a
2570: token representing something in the map, such as the beginning of a
2571: new branch. The possible tokens are:
2572:
2573: =over 4
1.51 bowersj2 2574:
1.222 bowersj2 2575: =item * B<END_ITERATOR>:
2576:
2577: The iterator has returned all that it's going to. Further calls to the
2578: iterator will just produce more of these. This is a "false" value, and
2579: is the only false value the iterator which will be returned, so it can
2580: be used as a loop sentinel.
2581:
1.217 bowersj2 2582: =item * B<BEGIN_MAP>:
1.51 bowersj2 2583:
1.174 albertel 2584: A new map is being recursed into. This is returned I<after> the map
2585: resource itself is returned.
1.51 bowersj2 2586:
1.217 bowersj2 2587: =item * B<END_MAP>:
1.174 albertel 2588:
2589: The map is now done.
1.51 bowersj2 2590:
1.217 bowersj2 2591: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 2592:
1.174 albertel 2593: A branch is now starting. The next resource returned will be the first
2594: in that branch.
1.70 bowersj2 2595:
1.217 bowersj2 2596: =item * B<END_BRANCH>:
1.70 bowersj2 2597:
1.174 albertel 2598: The branch is now done.
1.51 bowersj2 2599:
2600: =back
2601:
1.174 albertel 2602: The tokens are retreivable via methods on the iterator object, i.e.,
2603: $iterator->END_MAP.
1.70 bowersj2 2604:
1.174 albertel 2605: Maps can contain empty resources. The iterator will automatically skip
2606: over such resources, but will still treat the structure
2607: correctly. Thus, a complicated map with several branches, but
2608: consisting entirely of empty resources except for one beginning or
2609: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
2610: but only one resource will be returned.
1.116 bowersj2 2611:
1.242 matthew 2612: =back
2613:
1.222 bowersj2 2614: =head2 Normal Usage
2615:
2616: Normal usage of the iterator object is to do the following:
2617:
2618: my $it = $navmap->getIterator([your params here]);
2619: my $curRes;
2620: while ($curRes = $it->next()) {
2621: [your logic here]
2622: }
2623:
2624: Note that inside of the loop, it's frequently useful to check if
2625: "$curRes" is a reference or not with the reference function; only
2626: resource objects will be references, and any non-references will
2627: be the tokens described above.
2628:
2629: Also note there is some old code floating around that trys to track
2630: the depth of the iterator to see when it's done; do not copy that
2631: code. It is difficult to get right and harder to understand then
2632: this. They should be migrated to this new style.
1.51 bowersj2 2633:
2634: =cut
2635:
2636: # Here are the tokens for the iterator:
2637:
1.222 bowersj2 2638: sub END_ITERATOR { return 0; }
1.51 bowersj2 2639: sub BEGIN_MAP { return 1; } # begining of a new map
2640: sub END_MAP { return 2; } # end of the map
2641: sub BEGIN_BRANCH { return 3; } # beginning of a branch
2642: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 2643: sub FORWARD { return 1; } # go forward
2644: sub BACKWARD { return 2; }
1.51 bowersj2 2645:
1.96 bowersj2 2646: sub min {
2647: (my $a, my $b) = @_;
2648: if ($a < $b) { return $a; } else { return $b; }
2649: }
2650:
1.94 bowersj2 2651: sub new {
2652: # magic invocation to create a class instance
2653: my $proto = shift;
2654: my $class = ref($proto) || $proto;
2655: my $self = {};
2656:
1.300 albertel 2657: weaken($self->{NAV_MAP} = shift);
1.94 bowersj2 2658: return undef unless ($self->{NAV_MAP});
2659:
2660: # Handle the parameters
2661: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
2662: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
2663:
2664: # If the given resources are just the ID of the resource, get the
2665: # objects
2666: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
2667: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
2668: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
2669: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
2670:
2671: $self->{FILTER} = shift;
2672:
2673: # A hash, used as a set, of resource already seen
2674: $self->{ALREADY_SEEN} = shift;
2675: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
2676: $self->{CONDITION} = shift;
2677:
1.116 bowersj2 2678: # Do we want to automatically follow "redirection" maps?
2679: $self->{FORCE_TOP} = shift;
2680:
1.162 bowersj2 2681: # Do we want to return the top-level map object (resource 0.0)?
2682: $self->{RETURN_0} = shift;
2683: # have we done that yet?
2684: $self->{HAVE_RETURNED_0} = 0;
2685:
1.94 bowersj2 2686: # Now, we need to pre-process the map, by walking forward and backward
2687: # over the parts of the map we're going to look at.
1.96 bowersj2 2688:
1.97 bowersj2 2689: # The processing steps are exactly the same, except for a few small
2690: # changes, so I bundle those up in the following list of two elements:
2691: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
2692: # first_resource).
2693: # This prevents writing nearly-identical code twice.
2694: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
2695: 'FIRST_RESOURCE'],
2696: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
2697: 'FINISH_RESOURCE'] );
2698:
1.98 bowersj2 2699: my $maxDepth = 0; # tracks max depth
2700:
1.116 bowersj2 2701: # If there is only one resource in this map, and it's a map, we
2702: # want to remember that, so the user can ask for the first map
2703: # that isn't just a redirector.
2704: my $resource; my $resourceCount = 0;
2705:
1.209 bowersj2 2706: # Documentation on this algorithm can be found in the CVS repository at
2707: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
2708: # in that file.
1.107 bowersj2 2709: # **1**
2710:
1.97 bowersj2 2711: foreach my $pass (@iterations) {
2712: my $direction = $pass->[0];
2713: my $valName = $pass->[1];
2714: my $nextResourceMethod = $pass->[2];
2715: my $firstResourceName = $pass->[3];
2716:
2717: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
2718: $self->{FIRST_RESOURCE},
2719: $self->{FINISH_RESOURCE},
2720: {}, undef, 0, $direction);
1.96 bowersj2 2721:
1.97 bowersj2 2722: # prime the recursion
2723: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 2724: $iterator->next();
1.97 bowersj2 2725: my $curRes = $iterator->next();
1.222 bowersj2 2726: my $depth = 1;
2727: while ($depth > 0) {
2728: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
2729: if ($curRes == $iterator->END_MAP()) { $depth--; }
2730:
1.97 bowersj2 2731: if (ref($curRes)) {
1.116 bowersj2 2732: # If there's only one resource, this will save it
1.117 bowersj2 2733: # we have to filter empty resources from consideration here,
2734: # or even "empty", redirecting maps have two (start & finish)
2735: # or three (start, finish, plus redirector)
2736: if($direction == FORWARD && $curRes->src()) {
2737: $resource = $curRes; $resourceCount++;
2738: }
1.97 bowersj2 2739: my $resultingVal = $curRes->{DATA}->{$valName};
2740: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 2741: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 2742:
1.116 bowersj2 2743: if ($nextCount == 1) { # **3**
1.97 bowersj2 2744: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
2745: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
2746: }
2747:
1.116 bowersj2 2748: if ($nextCount > 1) { # **4**
1.97 bowersj2 2749: foreach my $res (@{$nextResources}) {
2750: my $current = $res->{DATA}->{$valName} || 999999999;
2751: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
2752: }
2753: }
2754: }
1.96 bowersj2 2755:
1.107 bowersj2 2756: # Assign the final val (**2**)
1.97 bowersj2 2757: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 2758: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
2759: $curRes->{DATA}->{BOT_UP_VAL});
2760:
2761: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
2762: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 2763: }
1.222 bowersj2 2764:
2765: $curRes = $iterator->next();
1.96 bowersj2 2766: }
2767: }
1.94 bowersj2 2768:
1.116 bowersj2 2769: # Check: Was this only one resource, a map?
1.255 albertel 2770: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 2771: my $firstResource = $resource->map_start();
2772: my $finishResource = $resource->map_finish();
2773: return
2774: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
2775: $finishResource, $self->{FILTER},
2776: $self->{ALREADY_SEEN},
1.314 albertel 2777: $self->{CONDITION},
2778: $self->{FORCE_TOP});
1.116 bowersj2 2779:
2780: }
2781:
1.98 bowersj2 2782: # Set up some bookkeeping information.
2783: $self->{CURRENT_DEPTH} = 0;
2784: $self->{MAX_DEPTH} = $maxDepth;
2785: $self->{STACK} = [];
2786: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 2787: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 2788:
2789: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
2790: push @{$self->{STACK}}, [];
2791: }
2792:
1.107 bowersj2 2793: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 2794: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
2795: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
2796:
2797: bless ($self);
2798:
2799: return $self;
2800: }
2801:
2802: sub next {
2803: my $self = shift;
1.256 albertel 2804: my $closeAllPages=shift;
1.222 bowersj2 2805: if ($self->{FINISHED}) {
2806: return END_ITERATOR();
2807: }
2808:
1.162 bowersj2 2809: # If we want to return the top-level map object, and haven't yet,
2810: # do so.
2811: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
2812: $self->{HAVE_RETURNED_0} = 1;
2813: return $self->{NAV_MAP}->getById('0.0');
2814: }
1.98 bowersj2 2815:
2816: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2817: # grab the next from the recursive iterator
1.256 albertel 2818: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 2819:
2820: # is it a begin or end map? If so, update the depth
2821: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
2822: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
2823:
2824: # Are we back at depth 0? If so, stop recursing
2825: if ($self->{RECURSIVE_DEPTH} == 0) {
2826: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
2827: }
2828:
2829: return $next;
2830: }
2831:
2832: if (defined($self->{FORCE_NEXT})) {
2833: my $tmp = $self->{FORCE_NEXT};
2834: $self->{FORCE_NEXT} = undef;
2835: return $tmp;
2836: }
2837:
2838: # Have we not yet begun? If not, return BEGIN_MAP and
2839: # remember we've started.
2840: if ( !$self->{STARTED} ) {
2841: $self->{STARTED} = 1;
2842: return $self->BEGIN_MAP();
2843: }
2844:
2845: # Here's the guts of the iterator.
2846:
2847: # Find the next resource, if any.
2848: my $found = 0;
2849: my $i = $self->{MAX_DEPTH};
2850: my $newDepth;
2851: my $here;
2852: while ( $i >= 0 && !$found ) {
1.107 bowersj2 2853: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
2854: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 2855: $found = 1;
2856: $newDepth = $i;
2857: }
2858: $i--;
2859: }
2860:
2861: # If we still didn't find anything, we're done.
2862: if ( !$found ) {
2863: # We need to get back down to the correct branch depth
2864: if ( $self->{CURRENT_DEPTH} > 0 ) {
2865: $self->{CURRENT_DEPTH}--;
2866: return END_BRANCH();
2867: } else {
1.222 bowersj2 2868: $self->{FINISHED} = 1;
1.98 bowersj2 2869: return END_MAP();
2870: }
2871: }
2872:
1.104 bowersj2 2873: # If this is not a resource, it must be an END_BRANCH marker we want
2874: # to return directly.
1.107 bowersj2 2875: if (!ref($here)) { # **8**
1.104 bowersj2 2876: if ($here == END_BRANCH()) { # paranoia, in case of later extension
2877: $self->{CURRENT_DEPTH}--;
2878: return $here;
2879: }
2880: }
2881:
2882: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
2883: $self->{HERE} = $here;
2884:
1.98 bowersj2 2885: # Get to the right level
2886: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
2887: push @{$self->{STACK}->[$newDepth]}, $here;
2888: $self->{CURRENT_DEPTH}--;
2889: return END_BRANCH();
2890: }
2891: if ( $self->{CURRENT_DEPTH} < $newDepth) {
2892: push @{$self->{STACK}->[$newDepth]}, $here;
2893: $self->{CURRENT_DEPTH}++;
2894: return BEGIN_BRANCH();
2895: }
2896:
2897: # If we made it here, we have the next resource, and we're at the
2898: # right branch level. So let's examine the resource for where
2899: # we can get to from here.
2900:
2901: # So we need to look at all the resources we can get to from here,
2902: # categorize them if we haven't seen them, remember if we have a new
2903: my $nextUnfiltered = $here->getNext();
1.104 bowersj2 2904: my $maxDepthAdded = -1;
2905:
1.98 bowersj2 2906: for (@$nextUnfiltered) {
2907: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 2908: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
2909: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 2910: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 2911: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 2912: }
2913: }
1.104 bowersj2 2914:
2915: # Is this the end of a branch? If so, all of the resources examined above
2916: # led to lower levels then the one we are currently at, so we push a END_BRANCH
2917: # marker onto the stack so we don't forget.
2918: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
2919: # BC branch and gets to C, it will see F as the only next resource, but it's
2920: # one level lower. Thus, this is the end of the branch, since there are no
2921: # more resources added to this level or above.
1.111 bowersj2 2922: # We don't do this if the examined resource is the finish resource,
2923: # because the condition given above is true, but the "END_MAP" will
2924: # take care of things and we should already be at depth 0.
1.104 bowersj2 2925: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 2926: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 2927: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
2928: }
2929:
1.98 bowersj2 2930: # That ends the main iterator logic. Now, do we want to recurse
2931: # down this map (if this resource is a map)?
1.256 albertel 2932: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 2933: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
2934: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
2935: my $firstResource = $self->{HERE}->map_start();
2936: my $finishResource = $self->{HERE}->map_finish();
2937:
2938: $self->{RECURSIVE_ITERATOR} =
2939: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
2940: $finishResource, $self->{FILTER},
1.314 albertel 2941: $self->{ALREADY_SEEN},
2942: $self->{CONDITION},
2943: $self->{FORCE_TOP});
1.98 bowersj2 2944: }
2945:
1.116 bowersj2 2946: # If this is a blank resource, don't actually return it.
1.117 bowersj2 2947: # Should you ever find you need it, make sure to add an option to the code
2948: # that you can use; other things depend on this behavior.
1.138 bowersj2 2949: my $browsePriv = $self->{HERE}->browsePriv();
2950: if (!$self->{HERE}->src() ||
2951: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 2952: return $self->next($closeAllPages);
1.116 bowersj2 2953: }
2954:
1.98 bowersj2 2955: return $self->{HERE};
2956:
2957: }
2958:
2959: =pod
2960:
1.174 albertel 2961: The other method available on the iterator is B<getStack>, which
2962: returns an array populated with the current 'stack' of maps, as
2963: references to the resource objects. Example: This is useful when
2964: making the navigation map, as we need to check whether we are under a
2965: page map to see if we need to link directly to the resource, or to the
2966: page. The first elements in the array will correspond to the top of
2967: the stack (most inclusive map).
1.98 bowersj2 2968:
2969: =cut
2970:
2971: sub getStack {
2972: my $self=shift;
2973:
2974: my @stack;
2975:
2976: $self->populateStack(\@stack);
2977:
2978: return \@stack;
2979: }
2980:
2981: # Private method: Calls the iterators recursively to populate the stack.
2982: sub populateStack {
2983: my $self=shift;
2984: my $stack = shift;
2985:
2986: push @$stack, $self->{HERE} if ($self->{HERE});
2987:
2988: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2989: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
2990: }
1.94 bowersj2 2991: }
2992:
2993: 1;
2994:
2995: package Apache::lonnavmaps::DFSiterator;
1.365 albertel 2996: use Scalar::Util qw(weaken);
1.320 albertel 2997: use Apache::lonnet;
2998:
1.100 bowersj2 2999: # Not documented in the perldoc: This is a simple iterator that just walks
3000: # through the nav map and presents the resources in a depth-first search
3001: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3002: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3003: # useful for pre-processing of some kind, and is in fact used by the main
3004: # iterator that way, but that's about it.
3005: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3006: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3007: # use might be found for it. - Jeremy
1.94 bowersj2 3008:
1.117 bowersj2 3009: # Unlike the main iterator, this DOES return all resources, even blank ones.
3010: # The main iterator needs them to correctly preprocess the map.
3011:
1.94 bowersj2 3012: sub BEGIN_MAP { return 1; } # begining of a new map
3013: sub END_MAP { return 2; } # end of the map
3014: sub FORWARD { return 1; } # go forward
3015: sub BACKWARD { return 2; }
3016:
1.100 bowersj2 3017: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3018: # filter hash ref (or undef), already seen hash or undef, condition
3019: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3020: sub new {
3021: # magic invocation to create a class instance
3022: my $proto = shift;
3023: my $class = ref($proto) || $proto;
3024: my $self = {};
3025:
1.300 albertel 3026: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3027: return undef unless ($self->{NAV_MAP});
3028:
3029: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3030: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3031:
3032: # If the given resources are just the ID of the resource, get the
3033: # objects
3034: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3035: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3036: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3037: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3038:
3039: $self->{FILTER} = shift;
3040:
3041: # A hash, used as a set, of resource already seen
3042: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3043: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3044: $self->{CONDITION} = shift;
1.89 bowersj2 3045: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3046:
1.100 bowersj2 3047: # Flag: Have we started yet?
1.51 bowersj2 3048: $self->{STARTED} = 0;
3049:
3050: # Should we continue calling the recursive iterator, if any?
3051: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3052: # The recursive iterator, if any
3053: $self->{RECURSIVE_ITERATOR} = undef;
3054: # Are we recursing on a map, or a branch?
3055: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3056: # And the count of how deep it is, so that this iterator can keep track of
3057: # when to pick back up again.
3058: $self->{RECURSIVE_DEPTH} = 0;
3059:
3060: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3061: $self->{STACK} = [];
1.51 bowersj2 3062:
3063: # Start with the first resource
1.89 bowersj2 3064: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3065: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3066: } else {
1.100 bowersj2 3067: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3068: }
1.51 bowersj2 3069:
3070: bless($self);
3071: return $self;
3072: }
3073:
3074: sub next {
3075: my $self = shift;
3076:
3077: # Are we using a recursive iterator? If so, pull from that and
3078: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3079: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3080: # grab the next from the recursive iterator
3081: my $next = $self->{RECURSIVE_ITERATOR}->next();
3082:
3083: # is it a begin or end map? Update depth if so
3084: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3085: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3086:
3087: # Are we back at depth 0? If so, stop recursing.
3088: if ($self->{RECURSIVE_DEPTH} == 0) {
3089: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3090: }
3091:
3092: return $next;
3093: }
3094:
3095: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3096: # END_MAP, which will end the iterator.
3097: if (scalar(@{$self->{STACK}}) == 0) {
3098: return $self->END_MAP();
1.51 bowersj2 3099: }
3100:
3101: # Have we not yet begun? If not, return BEGIN_MAP and
3102: # remember that we've started.
3103: if ( !$self->{STARTED} ) {
3104: $self->{STARTED} = 1;
3105: return $self->BEGIN_MAP;
3106: }
3107:
3108: # Get the next resource in the branch
1.100 bowersj2 3109: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3110:
1.100 bowersj2 3111: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3112: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3113:
3114: # Get the next possible resources
1.90 bowersj2 3115: my $nextUnfiltered;
1.89 bowersj2 3116: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3117: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3118: } else {
1.90 bowersj2 3119: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3120: }
1.51 bowersj2 3121: my $next = [];
3122:
3123: # filter the next possibilities to remove things we've
1.100 bowersj2 3124: # already seen.
1.394 ! raeburn 3125: foreach my $item (@$nextUnfiltered) {
! 3126: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
! 3127: push @$next, $item;
1.52 bowersj2 3128: }
1.51 bowersj2 3129: }
3130:
3131: while (@$next) {
1.100 bowersj2 3132: # copy the next possibilities over to the stack
3133: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3134: }
3135:
3136: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3137: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3138: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3139: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3140: my $firstResource = $self->{HERE}->map_start();
3141: my $finishResource = $self->{HERE}->map_finish();
3142:
3143: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3144: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3145: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3146: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3147: }
3148:
3149: return $self->{HERE};
1.190 bowersj2 3150: }
3151:
3152: # Identical to the full iterator methods of the same name. Hate to copy/paste
3153: # but I also hate to "inherit" either iterator from the other.
3154:
3155: sub getStack {
3156: my $self=shift;
3157:
3158: my @stack;
3159:
3160: $self->populateStack(\@stack);
3161:
3162: return \@stack;
3163: }
3164:
3165: # Private method: Calls the iterators recursively to populate the stack.
3166: sub populateStack {
3167: my $self=shift;
3168: my $stack = shift;
3169:
3170: push @$stack, $self->{HERE} if ($self->{HERE});
3171:
3172: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3173: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3174: }
1.51 bowersj2 3175: }
3176:
1.1 www 3177: 1;
1.2 www 3178:
1.51 bowersj2 3179: package Apache::lonnavmaps::resource;
1.365 albertel 3180: use Scalar::Util qw(weaken);
1.51 bowersj2 3181: use Apache::lonnet;
3182:
3183: =pod
3184:
1.217 bowersj2 3185: =head1 Object: resource
1.51 bowersj2 3186:
1.217 bowersj2 3187: X<resource, navmap object>
1.174 albertel 3188: A resource object encapsulates a resource in a resource map, allowing
3189: easy manipulation of the resource, querying the properties of the
3190: resource (including user properties), and represents a reference that
3191: can be used as the canonical representation of the resource by
3192: lonnavmap clients like renderers.
3193:
3194: A resource only makes sense in the context of a navmap, as some of the
3195: data is stored in the navmap object.
3196:
3197: You will probably never need to instantiate this object directly. Use
3198: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3199: starting resource.
1.51 bowersj2 3200:
1.188 bowersj2 3201: Resource objects respect the parameter_hiddenparts, which suppresses
3202: various parts according to the wishes of the map author. As of this
3203: writing, there is no way to override this parameter, and suppressed
3204: parts will never be returned, nor will their response types or ids be
3205: stored.
3206:
1.217 bowersj2 3207: =head2 Overview
1.51 bowersj2 3208:
1.217 bowersj2 3209: A B<Resource> is the most granular type of object in LON-CAPA that can
3210: be included in a course. It can either be a particular resource, like
3211: an HTML page, external resource, problem, etc., or it can be a
3212: container sequence, such as a "page" or a "map".
3213:
3214: To see a sequence from the user's point of view, please see the
3215: B<Creating a Course: Maps and Sequences> chapter of the Author's
3216: Manual.
3217:
3218: A Resource Object, once obtained from a navmap object via a B<getBy*>
3219: method of the navmap, or from an iterator, allows you to query
3220: information about that resource.
3221:
3222: Generally, you do not ever want to create a resource object yourself,
3223: so creation has been left undocumented. Always retrieve resources
3224: from navmap objects.
3225:
3226: =head3 Identifying Resources
3227:
3228: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3229: unique to that resource for a given course. X<resource ID, in big hash>
3230: The Resource ID has the form #.#, where the first number is the same
3231: for every resource in a map, and the second is unique. For instance,
3232: for a course laid out like this:
3233:
3234: * Problem 1
3235: * Map
3236: * Resource 2
3237: * Resource 3
3238:
3239: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3240: C<Resource 3> will share a first number. The second number may end up
3241: re-used between the two groups.
3242:
3243: The resource ID is only used in the big hash, but can be used in the
3244: context of a course to identify a resource easily. (For instance, the
3245: printing system uses it to record which resources from a sequence you
3246: wish to print.)
3247:
3248: X<symb> X<resource, symb>
3249: All resources also have B<symb>s, which uniquely identify a resource
3250: in a course. Many internal LON-CAPA functions expect a symb. A symb
3251: carries along with it the URL of the resource, and the map it appears
3252: in. Symbs are much larger then resource IDs.
1.51 bowersj2 3253:
3254: =cut
3255:
3256: sub new {
3257: # magic invocation to create a class instance
3258: my $proto = shift;
3259: my $class = ref($proto) || $proto;
3260: my $self = {};
3261:
1.300 albertel 3262: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3263: $self->{ID} = shift;
3264:
3265: # Store this new resource in the parent nav map's cache.
3266: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 3267: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 3268:
3269: # A hash that can be used by two-pass algorithms to store data
3270: # about this resource in. Not used by the resource object
3271: # directly.
3272: $self->{DATA} = {};
3273:
3274: bless($self);
3275:
3276: return $self;
3277: }
3278:
1.70 bowersj2 3279: # private function: simplify the NAV_HASH lookups we keep doing
3280: # pass the name, and to automatically append my ID, pass a true val on the
3281: # second param
3282: sub navHash {
3283: my $self = shift;
3284: my $param = shift;
3285: my $id = shift;
1.115 bowersj2 3286: return $self->{NAV_MAP}->navhash($param . ($id?$self->{ID}:""));
1.70 bowersj2 3287: }
3288:
1.51 bowersj2 3289: =pod
3290:
1.217 bowersj2 3291: =head2 Methods
1.70 bowersj2 3292:
1.217 bowersj2 3293: Once you have a resource object, here's what you can do with it:
3294:
3295: =head3 Attribute Retrieval
3296:
3297: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 3298:
3299: =over 4
3300:
1.217 bowersj2 3301: =item * B<ID>: Every resource has an ID that is unique for that
3302: resource in the course it is in. The ID is actually in the hash
3303: representing the resource, so for a resource object $res, obtain
3304: it via C<$res->{ID}).
3305:
1.174 albertel 3306: =item * B<compTitle>:
3307:
3308: Returns a "composite title", that is equal to $res->title() if the
3309: resource has a title, and is otherwise the last part of the URL (e.g.,
3310: "problem.problem").
3311:
3312: =item * B<ext>:
3313:
3314: Returns true if the resource is external.
3315:
3316: =item * B<kind>:
3317:
3318: Returns the kind of the resource from the compiled nav map.
3319:
3320: =item * B<randomout>:
1.106 bowersj2 3321:
1.174 albertel 3322: Returns true if this resource was chosen to NOT be shown to the user
3323: by the random map selection feature. In other words, this is usually
3324: false.
1.70 bowersj2 3325:
1.174 albertel 3326: =item * B<randompick>:
1.70 bowersj2 3327:
1.174 albertel 3328: Returns true for a map if the randompick feature is being used on the
3329: map. (?)
1.70 bowersj2 3330:
1.174 albertel 3331: =item * B<src>:
1.51 bowersj2 3332:
1.174 albertel 3333: Returns the source for the resource.
1.70 bowersj2 3334:
1.174 albertel 3335: =item * B<symb>:
1.70 bowersj2 3336:
1.174 albertel 3337: Returns the symb for the resource.
1.70 bowersj2 3338:
1.174 albertel 3339: =item * B<title>:
1.70 bowersj2 3340:
1.174 albertel 3341: Returns the title of the resource.
3342:
1.51 bowersj2 3343: =back
3344:
3345: =cut
3346:
3347: # These info functions can be used directly, as they don't return
3348: # resource information.
1.85 bowersj2 3349: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.303 albertel 3350: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
1.70 bowersj2 3351: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 3352: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 3353: # considered private and undocumented
1.51 bowersj2 3354: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
3355: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 3356: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
3357: sub randompick {
3358: my $self = shift;
1.370 albertel 3359: return $self->parmval('randompick');
1.68 bowersj2 3360: }
1.303 albertel 3361: sub link {
3362: my $self=shift;
3363: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
3364: return $self->src;
3365: }
1.51 bowersj2 3366: sub src {
3367: my $self=shift;
3368: return $self->navHash("src_", 1);
3369: }
1.303 albertel 3370: sub shown_symb {
3371: my $self=shift;
3372: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->symb());}
3373: return $self->symb();
3374: }
1.328 www 3375: sub id {
3376: my $self=shift;
3377: return $self->{ID};
3378: }
3379: sub enclosing_map_src {
3380: my $self=shift;
3381: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3382: return $self->navHash('map_id_'.$first);
3383: }
1.51 bowersj2 3384: sub symb {
3385: my $self=shift;
3386: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3387: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 3388: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 3389: . '___' . $second . '___' . $symbSrc;
1.223 albertel 3390: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 3391: }
1.321 raeburn 3392: sub wrap_symb {
3393: my $self = shift;
3394: return $self->{NAV_MAP}->wrap_symb($self->symb());
3395: }
1.213 bowersj2 3396: sub title {
3397: my $self=shift;
3398: if ($self->{ID} eq '0.0') {
3399: # If this is the top-level map, return the title of the course
3400: # since this map can not be titled otherwise.
1.320 albertel 3401: return $env{'course.'.$env{'request.course.id'}.'.description'};
1.213 bowersj2 3402: }
3403: return $self->navHash("title_", 1); }
1.217 bowersj2 3404: # considered private and undocumented
1.70 bowersj2 3405: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.301 albertel 3406: sub condition {
3407: my $self=shift;
3408: my $undercond=$self->navHash("undercond_", 1);
3409: if (!defined($undercond)) { return 1; };
3410: my $condid=$self->navHash("condid_$undercond");
3411: if (!defined($condid)) { return 1; };
3412: my $condition=&Apache::lonnet::directcondval($condid);
3413: return $condition;
3414: }
1.342 albertel 3415: sub condval {
3416: my $self=shift;
1.359 albertel 3417: my ($pathname,$filename) =
3418: &Apache::lonnet::split_uri_for_cond($self->src());
1.342 albertel 3419:
3420: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3421: /\&\Q$filename\E\:([\d\|]+)\&/);
3422: if ($match) {
3423: return &Apache::lonnet::condval($1);
3424: }
3425: return 0;
3426: }
1.106 bowersj2 3427: sub compTitle {
3428: my $self = shift;
3429: my $title = $self->title();
1.176 www 3430: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 3431: if (!$title) {
3432: $title = $self->src();
3433: $title = substr($title, rindex($title, '/') + 1);
3434: }
3435: return $title;
3436: }
1.70 bowersj2 3437: =pod
3438:
3439: B<Predicate Testing the Resource>
3440:
3441: These methods are shortcuts to deciding if a given resource has a given property.
3442:
3443: =over 4
3444:
1.174 albertel 3445: =item * B<is_map>:
3446:
3447: Returns true if the resource is a map type.
3448:
3449: =item * B<is_problem>:
1.70 bowersj2 3450:
1.174 albertel 3451: Returns true if the resource is a problem type, false
3452: otherwise. (Looks at the extension on the src field; might need more
3453: to work correctly.)
1.70 bowersj2 3454:
1.174 albertel 3455: =item * B<is_page>:
1.70 bowersj2 3456:
1.174 albertel 3457: Returns true if the resource is a page.
3458:
3459: =item * B<is_sequence>:
3460:
3461: Returns true if the resource is a sequence.
1.70 bowersj2 3462:
3463: =back
3464:
3465: =cut
3466:
1.256 albertel 3467: sub hasResource {
3468: my $self = shift;
3469: return $self->{NAV_MAP}->hasResource(@_);
3470: }
3471:
3472: sub retrieveResources {
3473: my $self = shift;
3474: return $self->{NAV_MAP}->retrieveResources(@_);
3475: }
1.70 bowersj2 3476:
1.369 albertel 3477: sub is_exam {
3478: my ($self,$part) = @_;
3479: if ($self->parmval('type',$part) eq 'exam') {
3480: return 1;
3481: }
3482: if ($self->src() =~ /\.(exam)$/) {
3483: return 1;
3484: }
3485: return 0;
3486: }
1.70 bowersj2 3487: sub is_html {
1.51 bowersj2 3488: my $self=shift;
3489: my $src = $self->src();
1.70 bowersj2 3490: return ($src =~ /html$/);
1.51 bowersj2 3491: }
1.70 bowersj2 3492: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
3493: sub is_page {
1.51 bowersj2 3494: my $self=shift;
3495: my $src = $self->src();
1.205 bowersj2 3496: return $self->navHash("is_map_", 1) &&
3497: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 3498: }
1.361 albertel 3499: sub is_practice {
3500: my $self=shift;
3501: my ($part) = @_;
3502: if ($self->parmval('type',$part) eq 'practice') {
3503: return 1;
3504: }
3505: return 0;
3506: }
1.70 bowersj2 3507: sub is_problem {
1.51 bowersj2 3508: my $self=shift;
3509: my $src = $self->src();
1.361 albertel 3510: if ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
3511: return !($self->is_practice());
3512: }
3513: return 0;
1.256 albertel 3514: }
3515: sub contains_problem {
3516: my $self=shift;
3517: if ($self->is_page()) {
3518: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
3519: return $hasProblem;
3520: }
3521: return 0;
1.51 bowersj2 3522: }
1.70 bowersj2 3523: sub is_sequence {
1.51 bowersj2 3524: my $self=shift;
1.205 bowersj2 3525: return $self->navHash("is_map_", 1) &&
3526: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 3527: }
1.261 matthew 3528: sub is_survey {
3529: my $self = shift();
3530: my $part = shift();
1.263 albertel 3531: if ($self->parmval('type',$part) eq 'survey') {
1.261 matthew 3532: return 1;
3533: }
1.263 albertel 3534: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 3535: return 1;
3536: }
3537: return 0;
3538: }
1.360 albertel 3539: sub is_task {
3540: my $self=shift;
3541: my $src = $self->src();
3542: return ($src =~ /\.(task)$/)
3543: }
1.51 bowersj2 3544:
1.266 raeburn 3545: sub is_empty_sequence {
3546: my $self=shift;
3547: my $src = $self->src();
3548: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
3549: }
3550:
1.101 bowersj2 3551: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 3552: sub parmval {
3553: my $self = shift;
3554: my $what = shift;
1.185 bowersj2 3555: my $part = shift;
3556: if (!defined($part)) {
3557: $part = '0';
3558: }
1.51 bowersj2 3559: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
3560: }
3561:
1.70 bowersj2 3562: =pod
3563:
3564: B<Map Methods>
3565:
1.174 albertel 3566: These methods are useful for getting information about the map
3567: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 3568:
3569: =over 4
3570:
1.174 albertel 3571: =item * B<map_finish>:
3572:
3573: Returns a reference to a resource object corresponding to the finish
3574: resource of the map.
1.70 bowersj2 3575:
1.174 albertel 3576: =item * B<map_pc>:
1.70 bowersj2 3577:
1.174 albertel 3578: Returns the pc value of the map, which is the first number that
3579: appears in the resource ID of the resources in the map, and is the
3580: number that appears around the middle of the symbs of the resources in
3581: that map.
1.70 bowersj2 3582:
1.174 albertel 3583: =item * B<map_start>:
3584:
3585: Returns a reference to a resource object corresponding to the start
3586: resource of the map.
3587:
3588: =item * B<map_type>:
3589:
3590: Returns a string with the type of the map in it.
1.70 bowersj2 3591:
3592: =back
1.51 bowersj2 3593:
1.70 bowersj2 3594: =cut
1.51 bowersj2 3595:
3596: sub map_finish {
3597: my $self = shift;
3598: my $src = $self->src();
1.381 albertel 3599: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 3600: my $res = $self->navHash("map_finish_$src", 0);
3601: $res = $self->{NAV_MAP}->getById($res);
3602: return $res;
3603: }
1.70 bowersj2 3604: sub map_pc {
3605: my $self = shift;
1.381 albertel 3606: my $src = $self->src();
1.70 bowersj2 3607: return $self->navHash("map_pc_$src", 0);
3608: }
1.51 bowersj2 3609: sub map_start {
3610: my $self = shift;
3611: my $src = $self->src();
1.381 albertel 3612: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 3613: my $res = $self->navHash("map_start_$src", 0);
3614: $res = $self->{NAV_MAP}->getById($res);
3615: return $res;
3616: }
3617: sub map_type {
3618: my $self = shift;
3619: my $pc = $self->map_pc();
3620: return $self->navHash("map_type_$pc", 0);
3621: }
3622:
3623: #####
3624: # Property queries
3625: #####
3626:
3627: # These functions will be responsible for returning the CORRECT
3628: # VALUE for the parameter, no matter what. So while they may look
3629: # like direct calls to parmval, they can be more then that.
3630: # So, for instance, the duedate function should use the "duedatetype"
3631: # information, rather then the resource object user.
3632:
3633: =pod
3634:
3635: =head2 Resource Parameters
3636:
1.174 albertel 3637: In order to use the resource parameters correctly, the nav map must
3638: have been instantiated with genCourseAndUserOptions set to true, so
3639: the courseopt and useropt is read correctly. Then, you can call these
3640: functions to get the relevant parameters for the resource. Each
3641: function defaults to part "0", but can be directed to another part by
3642: passing the part as the parameter.
3643:
3644: These methods are responsible for getting the parameter correct, not
3645: merely reflecting the contents of the GDBM hashes. As we move towards
3646: dates relative to other dates, these methods should be updated to
3647: reflect that. (Then, anybody using these methods will not have to update
3648: their code.)
3649:
3650: =over 4
3651:
3652: =item * B<acc>:
3653:
3654: Get the Client IP/Name Access Control information.
1.51 bowersj2 3655:
1.174 albertel 3656: =item * B<answerdate>:
1.51 bowersj2 3657:
1.174 albertel 3658: Get the answer-reveal date for the problem.
3659:
1.211 bowersj2 3660: =item * B<awarded>:
3661:
3662: Gets the awarded value for the problem part. Requires genUserData set to
3663: true when the navmap object was created.
3664:
1.174 albertel 3665: =item * B<duedate>:
3666:
3667: Get the due date for the problem.
3668:
3669: =item * B<tries>:
3670:
3671: Get the number of tries the student has used on the problem.
3672:
3673: =item * B<maxtries>:
3674:
3675: Get the number of max tries allowed.
3676:
3677: =item * B<opendate>:
1.51 bowersj2 3678:
1.174 albertel 3679: Get the open date for the problem.
1.51 bowersj2 3680:
1.174 albertel 3681: =item * B<sig>:
1.51 bowersj2 3682:
1.174 albertel 3683: Get the significant figures setting.
1.51 bowersj2 3684:
1.174 albertel 3685: =item * B<tol>:
1.51 bowersj2 3686:
1.174 albertel 3687: Get the tolerance for the problem.
1.51 bowersj2 3688:
1.174 albertel 3689: =item * B<tries>:
1.51 bowersj2 3690:
1.174 albertel 3691: Get the number of tries the user has already used on the problem.
1.51 bowersj2 3692:
1.174 albertel 3693: =item * B<type>:
1.51 bowersj2 3694:
1.174 albertel 3695: Get the question type for the problem.
1.70 bowersj2 3696:
1.174 albertel 3697: =item * B<weight>:
1.51 bowersj2 3698:
1.174 albertel 3699: Get the weight for the problem.
1.51 bowersj2 3700:
3701: =back
3702:
3703: =cut
3704:
3705: sub acc {
3706: (my $self, my $part) = @_;
3707: return $self->parmval("acc", $part);
3708: }
3709: sub answerdate {
3710: (my $self, my $part) = @_;
3711: # Handle intervals
3712: if ($self->parmval("answerdate.type", $part) eq 'date_interval') {
3713: return $self->duedate($part) +
3714: $self->parmval("answerdate", $part);
3715: }
3716: return $self->parmval("answerdate", $part);
1.106 bowersj2 3717: }
1.211 bowersj2 3718: sub awarded {
3719: my $self = shift; my $part = shift;
1.221 bowersj2 3720: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 3721: if (!defined($part)) { $part = '0'; }
3722: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
3723: }
1.382 albertel 3724: # this should work exactly like the copy in lonhomework.pm
1.51 bowersj2 3725: sub duedate {
3726: (my $self, my $part) = @_;
1.382 albertel 3727: my $date;
1.260 albertel 3728: my $interval=$self->parmval("interval", $part);
1.382 albertel 3729: my $due_date=$self->parmval("duedate", $part);
1.390 albertel 3730: if ($interval =~ /\d+/) {
1.260 albertel 3731: my $first_access=&Apache::lonnet::get_first_access('map',$self->symb);
1.382 albertel 3732: if (defined($first_access)) {
3733: $interval = $first_access+$interval;
3734: $date = ($interval < $due_date)? $interval : $due_date;
3735: } else {
3736: $date = $due_date;
3737: }
3738: } else {
3739: $date = $due_date;
1.260 albertel 3740: }
1.382 albertel 3741: return $date;
1.51 bowersj2 3742: }
1.334 albertel 3743: sub handgrade {
3744: (my $self, my $part) = @_;
3745: return $self->parmval("handgrade", $part);
3746: }
1.51 bowersj2 3747: sub maxtries {
3748: (my $self, my $part) = @_;
3749: return $self->parmval("maxtries", $part);
3750: }
3751: sub opendate {
3752: (my $self, my $part) = @_;
3753: if ($self->parmval("opendate.type", $part) eq 'date_interval') {
3754: return $self->duedate($part) -
3755: $self->parmval("opendate", $part);
3756: }
3757: return $self->parmval("opendate");
3758: }
1.185 bowersj2 3759: sub problemstatus {
3760: (my $self, my $part) = @_;
1.236 bowersj2 3761: return lc $self->parmval("problemstatus", $part);
1.185 bowersj2 3762: }
1.51 bowersj2 3763: sub sig {
3764: (my $self, my $part) = @_;
3765: return $self->parmval("sig", $part);
3766: }
3767: sub tol {
3768: (my $self, my $part) = @_;
3769: return $self->parmval("tol", $part);
3770: }
1.108 bowersj2 3771: sub tries {
3772: my $self = shift;
3773: my $tries = $self->queryRestoreHash('tries', shift);
3774: if (!defined($tries)) { return '0';}
1.51 bowersj2 3775: return $tries;
3776: }
1.70 bowersj2 3777: sub type {
3778: (my $self, my $part) = @_;
3779: return $self->parmval("type", $part);
3780: }
1.109 bowersj2 3781: sub weight {
3782: my $self = shift; my $part = shift;
1.211 bowersj2 3783: if (!defined($part)) { $part = '0'; }
3784: return &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.320 albertel 3785: $self->symb(), $env{'user.domain'},
3786: $env{'user.name'},
3787: $env{'request.course.sec'});
1.274 matthew 3788: }
3789: sub part_display {
3790: my $self= shift(); my $partID = shift();
3791: if (! defined($partID)) { $partID = '0'; }
3792: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
3793: $self->symb);
3794: if (! defined($display) || $display eq '') {
3795: $display = $partID;
3796: }
3797: return $display;
1.70 bowersj2 3798: }
1.51 bowersj2 3799:
3800: # Multiple things need this
3801: sub getReturnHash {
3802: my $self = shift;
3803:
3804: if (!defined($self->{RETURN_HASH})) {
1.84 bowersj2 3805: my %tmpHash = &Apache::lonnet::restore($self->symb());
1.51 bowersj2 3806: $self->{RETURN_HASH} = \%tmpHash;
3807: }
3808: }
3809:
3810: ######
3811: # Status queries
3812: ######
3813:
3814: # These methods query the status of problems.
3815:
3816: # If we need to count parts, this function determines the number of
3817: # parts from the metadata. When called, it returns a reference to a list
3818: # of strings corresponding to the parts. (Thus, using it in a scalar context
3819: # tells you how many parts you have in the problem:
3820: # $partcount = scalar($resource->countParts());
3821: # Don't use $self->{PARTS} directly because you don't know if it's been
3822: # computed yet.
3823:
3824: =pod
3825:
3826: =head2 Resource misc
3827:
3828: Misc. functions for the resource.
3829:
3830: =over 4
3831:
1.174 albertel 3832: =item * B<hasDiscussion>:
1.59 bowersj2 3833:
1.174 albertel 3834: Returns a false value if there has been discussion since the user last
3835: logged in, true if there has. Always returns false if the discussion
3836: data was not extracted when the nav map was constructed.
3837:
1.366 albertel 3838: =item * B<last_post_time>:
3839:
3840: Returns a false value if there hasn't been discussion otherwise returns
3841: unix timestamp of last time a discussion posting (or edit) was made.
3842:
1.393 raeburn 3843: =item * B<discussion_info>:
1.366 albertel 3844:
1.393 raeburn 3845: optional argument is a filter (currently can be 'unread');
3846: returns in scalar context the count of the number of discussion postings.
1.366 albertel 3847:
3848: returns in list context both the count of postings and a hash ref
1.393 raeburn 3849: containing information about the postings (subject, id, timestamp) in a hash.
3850:
3851: 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 3852:
1.174 albertel 3853: =item * B<getFeedback>:
3854:
3855: Gets the feedback for the resource and returns the raw feedback string
3856: for the resource, or the null string if there is no feedback or the
3857: email data was not extracted when the nav map was constructed. Usually
3858: used like this:
1.59 bowersj2 3859:
1.394 ! raeburn 3860: for my $url (split(/\,/, $res->getFeedback())) {
! 3861: my $link = &escape($url);
1.59 bowersj2 3862: ...
3863:
3864: and use the link as appropriate.
3865:
3866: =cut
3867:
3868: sub hasDiscussion {
3869: my $self = shift;
3870: return $self->{NAV_MAP}->hasDiscussion($self->symb());
3871: }
3872:
1.366 albertel 3873: sub last_post_time {
3874: my $self = shift;
3875: return $self->{NAV_MAP}->last_post_time($self->symb());
3876: }
3877:
1.393 raeburn 3878: sub discussion_info {
3879: my ($self,$filter) = @_;
3880: return $self->{NAV_MAP}->discussion_info($self->symb(),$filter);
1.366 albertel 3881: }
3882:
1.59 bowersj2 3883: sub getFeedback {
3884: my $self = shift;
1.124 bowersj2 3885: my $source = $self->src();
1.125 bowersj2 3886: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.124 bowersj2 3887: return $self->{NAV_MAP}->getFeedback($source);
3888: }
3889:
3890: sub getErrors {
3891: my $self = shift;
3892: my $source = $self->src();
3893: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
3894: return $self->{NAV_MAP}->getErrors($source);
1.59 bowersj2 3895: }
3896:
3897: =pod
3898:
1.174 albertel 3899: =item * B<parts>():
1.51 bowersj2 3900:
1.174 albertel 3901: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 3902: each part of the problem. Single part problems have only a part '0'.
3903: Multipart problems do not return their part '0', since they typically
3904: do not really matter.
1.174 albertel 3905:
3906: =item * B<countParts>():
3907:
3908: Returns the number of parts of the problem a student can answer. Thus,
3909: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 3910: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 3911:
1.290 matthew 3912: =item * B<countResponses>():
3913:
3914: Returns the total number of responses in the problem a student can answer.
3915:
3916: =item * B<responseTypes>():
3917:
3918: Returns a hash whose keys are the response types. The values are the number
3919: of times each response type is used. This is for the I<entire> problem, not
3920: just a single part.
3921:
1.192 bowersj2 3922: =item * B<multipart>():
3923:
1.193 bowersj2 3924: Returns true if the problem is multipart, false otherwise. Use this instead
3925: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 3926:
1.187 bowersj2 3927: =item * B<responseType>($part):
3928:
3929: Returns the response type of the part, without the word "response" on the
3930: end. Example return values: 'string', 'essay', 'numeric', etc.
3931:
1.193 bowersj2 3932: =item * B<responseIds>($part):
1.187 bowersj2 3933:
1.193 bowersj2 3934: Retreives the response IDs for the given part as an array reference containing
3935: strings naming the response IDs. This may be empty.
1.187 bowersj2 3936:
1.51 bowersj2 3937: =back
3938:
3939: =cut
3940:
3941: sub parts {
3942: my $self = shift;
3943:
1.192 bowersj2 3944: if ($self->ext) { return []; }
1.67 bowersj2 3945:
1.51 bowersj2 3946: $self->extractParts();
3947: return $self->{PARTS};
3948: }
3949:
3950: sub countParts {
3951: my $self = shift;
3952:
3953: my $parts = $self->parts();
1.191 bowersj2 3954:
3955: # If I left this here, then it's not necessary.
3956: #my $delta = 0;
3957: #for my $part (@$parts) {
3958: # if ($part eq '0') { $delta--; }
3959: #}
1.66 bowersj2 3960:
3961: if ($self->{RESOURCE_ERROR}) {
3962: return 0;
3963: }
3964:
1.191 bowersj2 3965: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 3966: }
3967:
1.290 matthew 3968: sub countResponses {
3969: my $self = shift;
3970: my $count;
1.293 matthew 3971: foreach my $part (@{$self->parts()}) {
3972: $count+= scalar($self->responseIds($part));
1.290 matthew 3973: }
3974: return $count;
3975: }
3976:
3977: sub responseTypes {
3978: my $self = shift;
1.291 albertel 3979: my %responses;
1.368 raeburn 3980: foreach my $part (@{$self->parts()}) {
1.290 matthew 3981: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 3982: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 3983: }
3984: }
1.291 albertel 3985: return %responses;
1.290 matthew 3986: }
3987:
1.192 bowersj2 3988: sub multipart {
3989: my $self = shift;
3990: return $self->countParts() > 1;
1.51 bowersj2 3991: }
3992:
1.225 bowersj2 3993: sub singlepart {
3994: my $self = shift;
3995: return $self->countParts() == 1;
3996: }
3997:
1.187 bowersj2 3998: sub responseType {
1.184 bowersj2 3999: my $self = shift;
4000: my $part = shift;
4001:
4002: $self->extractParts();
1.235 albertel 4003: if (defined($self->{RESPONSE_TYPES}->{$part})) {
4004: return @{$self->{RESPONSE_TYPES}->{$part}};
4005: } else {
4006: return undef;
4007: }
1.187 bowersj2 4008: }
4009:
1.193 bowersj2 4010: sub responseIds {
1.187 bowersj2 4011: my $self = shift;
4012: my $part = shift;
4013:
4014: $self->extractParts();
1.235 albertel 4015: if (defined($self->{RESPONSE_IDS}->{$part})) {
4016: return @{$self->{RESPONSE_IDS}->{$part}};
4017: } else {
4018: return undef;
4019: }
1.184 bowersj2 4020: }
4021:
4022: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 4023: # part types, and saves it.
1.51 bowersj2 4024: sub extractParts {
4025: my $self = shift;
4026:
1.153 bowersj2 4027: return if (defined($self->{PARTS}));
1.67 bowersj2 4028: return if ($self->ext);
1.51 bowersj2 4029:
4030: $self->{PARTS} = [];
4031:
1.181 bowersj2 4032: my %parts;
4033:
1.82 bowersj2 4034: # Retrieve part count, if this is a problem
4035: if ($self->is_problem()) {
1.240 albertel 4036: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 4037: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 4038:
1.239 bowersj2 4039: if ($partorder) {
4040: my @parts;
4041: for my $part (split (/,/,$partorder)) {
4042: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4043: push @parts, $part;
1.241 albertel 4044: $parts{$part} = 1;
1.239 bowersj2 4045: }
4046: }
4047: $self->{PARTS} = \@parts;
4048: } else {
4049: if (!$metadata) {
4050: $self->{RESOURCE_ERROR} = 1;
4051: $self->{PARTS} = [];
4052: $self->{PART_TYPE} = {};
4053: return;
4054: }
1.394 ! raeburn 4055: foreach my $entry (split(/\,/,$metadata)) {
! 4056: if ($entry =~ /^(?:part|Task)_(.*)$/) {
1.239 bowersj2 4057: my $part = $1;
4058: # This floods the logs if it blows up
4059: if (defined($parts{$part})) {
1.241 albertel 4060: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
4061: }
1.239 bowersj2 4062:
4063: # check to see if part is turned off.
4064:
4065: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4066: $parts{$part} = 1;
4067: }
4068: }
4069: }
4070: my @sortedParts = sort keys %parts;
4071: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 4072: }
1.82 bowersj2 4073:
1.187 bowersj2 4074:
1.284 matthew 4075: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 4076: my %responseIdHash;
4077: my %responseTypeHash;
4078:
1.189 bowersj2 4079:
4080: # Init the responseIdHash
1.394 ! raeburn 4081: foreach my $part (@{$self->{PARTS}}) {
! 4082: $responseIdHash{$part} = [];
1.189 bowersj2 4083: }
4084:
1.187 bowersj2 4085: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 4086: # response id are delimited by underscores, but both the part
1.187 bowersj2 4087: # name and response id can themselves have underscores in them.
4088: # So we have to use our knowlege of part names to figure out
4089: # where the part names begin and end, and even then, it is possible
4090: # to construct ambiguous situations.
1.379 albertel 4091: foreach my $data (split /,/, $metadata) {
4092: if ($data =~ /^([a-zA-Z]+)response_(.*)/
4093: || $data =~ /^(Task)_(.*)/) {
1.187 bowersj2 4094: my $responseType = $1;
4095: my $partStuff = $2;
4096: my $partIdSoFar = '';
4097: my @partChunks = split /_/, $partStuff;
4098: my $i = 0;
4099: for ($i = 0; $i < scalar(@partChunks); $i++) {
4100: if ($partIdSoFar) { $partIdSoFar .= '_'; }
4101: $partIdSoFar .= $partChunks[$i];
4102: if ($parts{$partIdSoFar}) {
4103: my @otherChunks = @partChunks[$i+1..$#partChunks];
4104: my $responseId = join('_', @otherChunks);
1.379 albertel 4105: if ($self->is_task()) {
4106: push(@{$responseIdHash{$partIdSoFar}},
4107: $partIdSoFar);
4108: } else {
4109: push(@{$responseIdHash{$partIdSoFar}},
4110: $responseId);
4111: }
4112: push(@{$responseTypeHash{$partIdSoFar}},
4113: $responseType);
1.187 bowersj2 4114: }
4115: }
4116: }
4117: }
1.264 albertel 4118: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 4119: #
4120: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 4121: if ($resorder) {
4122: my @resorder=split(/,/,$resorder);
4123: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 4124: my $i=0;
4125: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 4126: my @neworder;
4127: foreach my $possibleid (@resorder) {
4128: if (exists($resids{$possibleid})) {
1.286 albertel 4129: push(@neworder,$resids{$possibleid});
1.264 albertel 4130: }
4131: }
1.286 albertel 4132: my @ids;
4133: my @type;
4134: foreach my $element (@neworder) {
4135: push (@ids,$responseIdHash{$part}->[$element]);
4136: push (@type,$responseTypeHash{$part}->[$element]);
4137: }
4138: $responseIdHash{$part}=\@ids;
4139: $responseTypeHash{$part}=\@type;
1.264 albertel 4140: }
4141: }
1.187 bowersj2 4142: $self->{RESPONSE_IDS} = \%responseIdHash;
4143: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 4144: }
4145:
1.51 bowersj2 4146: return;
4147: }
4148:
4149: =pod
4150:
4151: =head2 Resource Status
4152:
1.174 albertel 4153: Problem resources have status information, reflecting their various
4154: dates and completion statuses.
1.51 bowersj2 4155:
1.174 albertel 4156: There are two aspects to the status: the date-related information and
4157: the completion information.
1.51 bowersj2 4158:
1.174 albertel 4159: Idiomatic usage of these two methods would probably look something
4160: like
1.51 bowersj2 4161:
1.394 ! raeburn 4162: foreach my $part ($resource->parts()) {
! 4163: my $dateStatus = $resource->getDateStatus($part);
! 4164: my $completionStatus = $resource->getCompletionStatus($part);
1.51 bowersj2 4165:
1.70 bowersj2 4166: or
4167:
1.394 ! raeburn 4168: my $status = $resource->status($part);
1.70 bowersj2 4169:
1.51 bowersj2 4170: ... use it here ...
4171: }
4172:
1.174 albertel 4173: Which you use depends on exactly what you are looking for. The
4174: status() function has been optimized for the nav maps display and may
4175: not precisely match what you need elsewhere.
1.101 bowersj2 4176:
1.174 albertel 4177: The symbolic constants shown below can be accessed through the
4178: resource object: C<$res->OPEN>.
1.101 bowersj2 4179:
1.51 bowersj2 4180: =over 4
4181:
1.174 albertel 4182: =item * B<getDateStatus>($part):
4183:
4184: ($part defaults to 0). A convenience function that returns a symbolic
4185: constant telling you about the date status of the part. The possible
4186: return values are:
1.51 bowersj2 4187:
4188: =back
4189:
4190: B<Date Codes>
4191:
4192: =over 4
4193:
1.174 albertel 4194: =item * B<OPEN_LATER>:
4195:
4196: The problem will be opened later.
4197:
4198: =item * B<OPEN>:
4199:
4200: Open and not yet due.
4201:
1.51 bowersj2 4202:
1.174 albertel 4203: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4204:
1.174 albertel 4205: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 4206:
1.174 albertel 4207: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 4208:
1.174 albertel 4209: The due date has passed and there is no answer opening date set.
1.51 bowersj2 4210:
1.174 albertel 4211: =item * B<ANSWER_OPEN>:
1.51 bowersj2 4212:
1.174 albertel 4213: The answer date is here.
4214:
4215: =item * B<NETWORK_FAILURE>:
4216:
4217: The information is unknown due to network failure.
1.51 bowersj2 4218:
4219: =back
4220:
4221: =cut
4222:
4223: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 4224: sub OPEN_LATER { return 0; }
4225: sub OPEN { return 1; }
4226: sub PAST_DUE_NO_ANSWER { return 2; }
4227: sub PAST_DUE_ANSWER_LATER { return 3; }
4228: sub ANSWER_OPEN { return 4; }
4229: sub NOTHING_SET { return 5; }
4230: sub NETWORK_FAILURE { return 100; }
4231:
4232: # getDateStatus gets the date status for a given problem part.
4233: # Because answer date, due date, and open date are fully independent
4234: # (i.e., it is perfectly possible to *only* have an answer date),
4235: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
4236: # (past, future, none given). This function handles this with a decision
4237: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 4238:
4239: sub getDateStatus {
4240: my $self = shift;
4241: my $part = shift;
4242: $part = "0" if (!defined($part));
1.54 bowersj2 4243:
4244: # Always return network failure if there was one.
1.51 bowersj2 4245: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4246:
4247: my $now = time();
4248:
1.53 bowersj2 4249: my $open = $self->opendate($part);
4250: my $due = $self->duedate($part);
4251: my $answer = $self->answerdate($part);
4252:
4253: if (!$open && !$due && !$answer) {
4254: # no data on the problem at all
4255: # should this be the same as "open later"? think multipart.
4256: return $self->NOTHING_SET;
4257: }
1.59 bowersj2 4258: if (!$open || $now < $open) {return $self->OPEN_LATER}
4259: if (!$due || $now < $due) {return $self->OPEN}
4260: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
4261: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 4262: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 4263: }
4264:
4265: =pod
4266:
4267: B<>
4268:
4269: =over 4
4270:
1.174 albertel 4271: =item * B<getCompletionStatus>($part):
1.51 bowersj2 4272:
1.174 albertel 4273: ($part defaults to 0.) A convenience function that returns a symbolic
4274: constant telling you about the completion status of the part, with the
4275: following possible results:
4276:
4277: =back
1.51 bowersj2 4278:
4279: B<Completion Codes>
4280:
4281: =over 4
4282:
1.174 albertel 4283: =item * B<NOT_ATTEMPTED>:
4284:
4285: Has not been attempted at all.
4286:
4287: =item * B<INCORRECT>:
4288:
4289: Attempted, but wrong by student.
1.51 bowersj2 4290:
1.174 albertel 4291: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 4292:
1.174 albertel 4293: Attempted, but wrong by instructor override.
1.51 bowersj2 4294:
1.174 albertel 4295: =item * B<CORRECT>:
1.51 bowersj2 4296:
1.174 albertel 4297: Correct or correct by instructor.
1.51 bowersj2 4298:
1.174 albertel 4299: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 4300:
1.174 albertel 4301: Correct by instructor override.
1.51 bowersj2 4302:
1.174 albertel 4303: =item * B<EXCUSED>:
4304:
4305: Excused. Not yet implemented.
4306:
4307: =item * B<NETWORK_FAILURE>:
4308:
4309: Information not available due to network failure.
4310:
4311: =item * B<ATTEMPTED>:
4312:
4313: Attempted, and not yet graded.
1.69 bowersj2 4314:
1.51 bowersj2 4315: =back
4316:
4317: =cut
4318:
1.53 bowersj2 4319: sub NOT_ATTEMPTED { return 10; }
4320: sub INCORRECT { return 11; }
4321: sub INCORRECT_BY_OVERRIDE { return 12; }
4322: sub CORRECT { return 13; }
4323: sub CORRECT_BY_OVERRIDE { return 14; }
4324: sub EXCUSED { return 15; }
1.69 bowersj2 4325: sub ATTEMPTED { return 16; }
1.51 bowersj2 4326:
4327: sub getCompletionStatus {
4328: my $self = shift;
1.332 albertel 4329: my $part = shift;
1.51 bowersj2 4330: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4331:
1.332 albertel 4332: my $status = $self->queryRestoreHash('solved', $part);
1.51 bowersj2 4333:
1.251 www 4334: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 4335: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 4336: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.332 albertel 4337: if ($status eq 'correct_by_override') {
4338: return $self->CORRECT_BY_OVERRIDE;
4339: }
1.51 bowersj2 4340: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
4341: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
4342: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 4343: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 4344: return $self->NOT_ATTEMPTED;
1.108 bowersj2 4345: }
4346:
4347: sub queryRestoreHash {
4348: my $self = shift;
4349: my $hashentry = shift;
4350: my $part = shift;
1.185 bowersj2 4351: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 4352: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4353:
4354: $self->getReturnHash();
4355:
4356: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 4357: }
4358:
4359: =pod
4360:
4361: B<Composite Status>
4362:
1.174 albertel 4363: Along with directly returning the date or completion status, the
4364: resource object includes a convenience function B<status>() that will
4365: combine the two status tidbits into one composite status that can
1.191 bowersj2 4366: represent the status of the resource as a whole. This method represents
4367: the concept of the thing we want to display to the user on the nav maps
4368: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 4369: documented in the comments of the status method. The following results
4370: may be returned, all available as methods on the resource object
1.185 bowersj2 4371: ($res->NETWORK_FAILURE): In addition to the return values that match
4372: the date or completion status, this function can return "ANSWER_SUBMITTED"
4373: if that problemstatus parameter value is set to No, suppressing the
4374: incorrect/correct feedback.
1.51 bowersj2 4375:
4376: =over 4
4377:
1.174 albertel 4378: =item * B<NETWORK_FAILURE>:
4379:
4380: The network has failed and the information is not available.
1.51 bowersj2 4381:
1.174 albertel 4382: =item * B<NOTHING_SET>:
1.53 bowersj2 4383:
1.174 albertel 4384: No dates have been set for this problem (part) at all. (Because only
4385: certain parts of a multi-part problem may be assigned, this can not be
4386: collapsed into "open later", as we do not know a given part will EVER
4387: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 4388:
1.174 albertel 4389: =item * B<CORRECT>:
1.51 bowersj2 4390:
1.174 albertel 4391: For any reason at all, the part is considered correct.
1.54 bowersj2 4392:
1.174 albertel 4393: =item * B<EXCUSED>:
1.51 bowersj2 4394:
1.174 albertel 4395: For any reason at all, the problem is excused.
1.51 bowersj2 4396:
1.174 albertel 4397: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 4398:
1.174 albertel 4399: The problem is past due, not considered correct, and no answer date is
4400: set.
1.51 bowersj2 4401:
1.174 albertel 4402: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4403:
1.174 albertel 4404: The problem is past due, not considered correct, and an answer date in
4405: the future is set.
1.51 bowersj2 4406:
1.174 albertel 4407: =item * B<ANSWER_OPEN>:
4408:
4409: The problem is past due, not correct, and the answer is now available.
4410:
4411: =item * B<OPEN_LATER>:
4412:
4413: The problem is not yet open.
4414:
4415: =item * B<TRIES_LEFT>:
4416:
4417: The problem is open, has been tried, is not correct, but there are
4418: tries left.
4419:
4420: =item * B<INCORRECT>:
4421:
4422: The problem is open, and all tries have been used without getting the
4423: correct answer.
4424:
4425: =item * B<OPEN>:
4426:
4427: The item is open and not yet tried.
4428:
4429: =item * B<ATTEMPTED>:
4430:
4431: The problem has been attempted.
1.69 bowersj2 4432:
1.185 bowersj2 4433: =item * B<ANSWER_SUBMITTED>:
4434:
4435: An answer has been submitted, but the student should not see it.
4436:
1.51 bowersj2 4437: =back
4438:
4439: =cut
4440:
1.185 bowersj2 4441: sub TRIES_LEFT { return 20; }
4442: sub ANSWER_SUBMITTED { return 21; }
1.332 albertel 4443: sub PARTIALLY_CORRECT{ return 22; }
1.51 bowersj2 4444:
4445: sub status {
4446: my $self = shift;
4447: my $part = shift;
4448: if (!defined($part)) { $part = "0"; }
4449: my $completionStatus = $self->getCompletionStatus($part);
4450: my $dateStatus = $self->getDateStatus($part);
4451:
4452: # What we have is a two-dimensional matrix with 4 entries on one
4453: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 4454: # plus network failure and "no date data at all".
1.51 bowersj2 4455:
1.222 bowersj2 4456: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 4457: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 4458:
1.236 bowersj2 4459: my $suppressFeedback = $self->problemstatus($part) eq 'no';
4460: # If there's an answer date and we're past it, don't
4461: # suppress the feedback; student should know
1.330 albertel 4462: if ($self->duedate($part) && $self->duedate($part) < time() &&
4463: $self->answerdate($part) && $self->answerdate($part) < time()) {
1.236 bowersj2 4464: $suppressFeedback = 0;
4465: }
1.185 bowersj2 4466:
1.51 bowersj2 4467: # There are a few whole rows we can dispose of:
1.53 bowersj2 4468: if ($completionStatus == CORRECT ||
4469: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.332 albertel 4470: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
4471: my $awarded=$self->awarded($part);
4472: if ($awarded < 1 && $awarded > 0) {
4473: return PARTIALLY_CORRECT;
4474: } elsif ($awarded<1) {
4475: return INCORRECT;
4476: }
4477: return CORRECT;
1.69 bowersj2 4478: }
4479:
1.343 albertel 4480: # If it's WRONG... and not open
4481: if ( ($completionStatus == INCORRECT ||
4482: $completionStatus == INCORRECT_BY_OVERRIDE)
4483: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
4484: return INCORRECT;
4485: }
4486:
1.69 bowersj2 4487: if ($completionStatus == ATTEMPTED) {
4488: return ATTEMPTED;
1.53 bowersj2 4489: }
4490:
4491: # If it's EXCUSED, then return that no matter what
4492: if ($completionStatus == EXCUSED) {
4493: return EXCUSED;
1.51 bowersj2 4494: }
4495:
1.53 bowersj2 4496: if ($dateStatus == NOTHING_SET) {
4497: return NOTHING_SET;
1.51 bowersj2 4498: }
4499:
1.69 bowersj2 4500: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
4501: # by 4 matrix (date statuses).
1.51 bowersj2 4502:
1.54 bowersj2 4503: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 4504: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 4505: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 4506: }
4507:
1.53 bowersj2 4508: if ($dateStatus == ANSWER_OPEN) {
4509: return ANSWER_OPEN;
1.51 bowersj2 4510: }
4511:
4512: # Now: (incorrect, incorrect_override, not_attempted) x
4513: # (open_later), (open)
4514:
1.53 bowersj2 4515: if ($dateStatus == OPEN_LATER) {
4516: return OPEN_LATER;
1.51 bowersj2 4517: }
4518:
4519: # If it's WRONG...
1.53 bowersj2 4520: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 4521: # and there are TRIES LEFT:
1.79 bowersj2 4522: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 4523: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 4524: }
1.185 bowersj2 4525: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 4526: }
4527:
4528: # Otherwise, it's untried and open
1.53 bowersj2 4529: return OPEN;
1.224 bowersj2 4530: }
4531:
4532: sub CLOSED { return 23; }
4533: sub ERROR { return 24; }
4534:
4535: =pod
4536:
4537: B<Simple Status>
4538:
4539: Convenience method B<simpleStatus> provides a "simple status" for the resource.
4540: "Simple status" corresponds to "which icon is shown on the
4541: Navmaps". There are six "simple" statuses:
4542:
4543: =over 4
4544:
4545: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
4546:
4547: =item * B<OPEN>: The problem is open and unattempted.
4548:
4549: =item * B<CORRECT>: The problem is correct for any reason.
4550:
4551: =item * B<INCORRECT>: The problem is incorrect and can still be
4552: completed successfully.
4553:
4554: =item * B<ATTEMPTED>: The problem has been attempted, but the student
4555: does not know if they are correct. (The ellipsis icon.)
4556:
4557: =item * B<ERROR>: There is an error retrieving information about this
4558: problem.
4559:
4560: =back
4561:
4562: =cut
4563:
4564: # This hash maps the composite status to this simple status, and
4565: # can be used directly, if you like
4566: my %compositeToSimple =
4567: (
4568: NETWORK_FAILURE() => ERROR,
4569: NOTHING_SET() => CLOSED,
4570: CORRECT() => CORRECT,
1.332 albertel 4571: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
1.224 bowersj2 4572: EXCUSED() => CORRECT,
4573: PAST_DUE_NO_ANSWER() => INCORRECT,
4574: PAST_DUE_ANSWER_LATER() => INCORRECT,
4575: ANSWER_OPEN() => INCORRECT,
4576: OPEN_LATER() => CLOSED,
4577: TRIES_LEFT() => OPEN,
4578: INCORRECT() => INCORRECT,
4579: OPEN() => OPEN,
4580: ATTEMPTED() => ATTEMPTED,
4581: ANSWER_SUBMITTED() => ATTEMPTED
4582: );
4583:
4584: sub simpleStatus {
4585: my $self = shift;
4586: my $part = shift;
4587: my $status = $self->status($part);
4588: return $compositeToSimple{$status};
1.225 bowersj2 4589: }
4590:
4591: =pod
4592:
4593: B<simpleStatusCount> will return an array reference containing, in
4594: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
4595: and ERROR parts the given problem has.
4596:
4597: =cut
4598:
4599: # This maps the status to the slot we want to increment
4600: my %statusToSlotMap =
4601: (
4602: OPEN() => 0,
4603: CLOSED() => 1,
4604: CORRECT() => 2,
4605: INCORRECT() => 3,
4606: ATTEMPTED() => 4,
4607: ERROR() => 5
4608: );
4609:
4610: sub statusToSlot { return $statusToSlotMap{shift()}; }
4611:
4612: sub simpleStatusCount {
4613: my $self = shift;
4614:
4615: my @counts = (0, 0, 0, 0, 0, 0, 0);
4616: foreach my $part (@{$self->parts()}) {
4617: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
4618: }
4619:
4620: return \@counts;
1.191 bowersj2 4621: }
4622:
4623: =pod
4624:
4625: B<Completable>
4626:
4627: The completable method represents the concept of I<whether the student can
4628: currently do the problem>. If the student can do the problem, which means
4629: that it is open, there are tries left, and if the problem is manually graded
4630: or the grade is suppressed via problemstatus, the student has not tried it
4631: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
4632: either the student has tried it and there is no feedback, or that for
4633: some reason it is no longer completable (not open yet, successfully completed,
4634: out of tries, etc.). As an example, this is used as the filter for the
4635: "Uncompleted Homework" option for the nav maps.
4636:
4637: If this does not quite meet your needs, do not fiddle with it (unless you are
4638: fixing it to better match the student's conception of "completable" because
4639: it's broken somehow)... make a new method.
4640:
4641: =cut
4642:
4643: sub completable {
4644: my $self = shift;
4645: if (!$self->is_problem()) { return 0; }
4646: my $partCount = $self->countParts();
4647:
4648: foreach my $part (@{$self->parts()}) {
4649: if ($part eq '0' && $partCount != 1) { next; }
4650: my $status = $self->status($part);
4651: # "If any of the parts are open, or have tries left (implies open),
4652: # and it is not "attempted" (manually graded problem), it is
4653: # not "complete"
1.216 bowersj2 4654: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
4655: $status == ANSWER_SUBMITTED() ) {
4656: # did this part already, as well as we can
4657: next;
4658: }
4659: if ($status == OPEN() || $status == TRIES_LEFT()) {
4660: return 1;
4661: }
1.191 bowersj2 4662: }
4663:
4664: # If all the parts were complete, so was this problem.
1.216 bowersj2 4665: return 0;
1.51 bowersj2 4666: }
4667:
4668: =pod
4669:
4670: =head2 Resource/Nav Map Navigation
4671:
4672: =over 4
4673:
1.174 albertel 4674: =item * B<getNext>():
4675:
4676: Retreive an array of the possible next resources after this
4677: one. Always returns an array, even in the one- or zero-element case.
4678:
4679: =item * B<getPrevious>():
1.85 bowersj2 4680:
1.174 albertel 4681: Retreive an array of the possible previous resources from this
4682: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 4683:
4684: =cut
4685:
4686: sub getNext {
4687: my $self = shift;
4688: my @branches;
4689: my $to = $self->to();
1.85 bowersj2 4690: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 4691: my $choice = $self->{NAV_MAP}->getById($branch);
1.342 albertel 4692: #if (!$choice->condition()) { next; }
1.51 bowersj2 4693: my $next = $choice->goesto();
4694: $next = $self->{NAV_MAP}->getById($next);
4695:
1.131 bowersj2 4696: push @branches, $next;
1.85 bowersj2 4697: }
4698: return \@branches;
4699: }
4700:
4701: sub getPrevious {
4702: my $self = shift;
4703: my @branches;
4704: my $from = $self->from();
4705: foreach my $branch ( split /,/, $from) {
4706: my $choice = $self->{NAV_MAP}->getById($branch);
4707: my $prev = $choice->comesfrom();
4708: $prev = $self->{NAV_MAP}->getById($prev);
4709:
1.131 bowersj2 4710: push @branches, $prev;
1.51 bowersj2 4711: }
4712: return \@branches;
1.131 bowersj2 4713: }
4714:
4715: sub browsePriv {
4716: my $self = shift;
4717: if (defined($self->{BROWSE_PRIV})) {
4718: return $self->{BROWSE_PRIV};
4719: }
4720:
1.311 albertel 4721: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
4722: $self->symb());
1.51 bowersj2 4723: }
4724:
4725: =pod
1.2 www 4726:
1.51 bowersj2 4727: =back
1.2 www 4728:
1.51 bowersj2 4729: =cut
1.2 www 4730:
1.51 bowersj2 4731: 1;
1.2 www 4732:
1.51 bowersj2 4733: __END__
1.2 www 4734:
4735:
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