Annotation of loncom/interface/lonnavmaps.pm, revision 1.297
1.2 www 1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
1.1 www 3: #
1.297 ! albertel 4: # $Id: lonnavmaps.pm,v 1.296 2004/09/21 20:33:49 albertel 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;
1.2 www 33: use Apache::Constants qw(:common :http);
1.18 albertel 34: use Apache::loncommon();
1.150 www 35: use Apache::lonmenu();
1.229 www 36: use Apache::lonlocal;
1.73 bowersj2 37: use POSIX qw (floor strftime);
1.192 bowersj2 38: use Data::Dumper; # for debugging, not always used
1.2 www 39:
1.133 bowersj2 40: # symbolic constants
41: sub SYMB { return 1; }
42: sub URL { return 2; }
43: sub NOTHING { return 3; }
44:
45: # Some data
46:
1.140 bowersj2 47: my $resObj = "Apache::lonnavmaps::resource";
48:
1.135 bowersj2 49: # Keep these mappings in sync with lonquickgrades, which uses the colors
50: # instead of the icons.
51: my %statusIconMap =
1.224 bowersj2 52: (
53: $resObj->CLOSED => '',
54: $resObj->OPEN => 'navmap.open.gif',
55: $resObj->CORRECT => 'navmap.correct.gif',
56: $resObj->INCORRECT => 'navmap.wrong.gif',
57: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
58: $resObj->ERROR => ''
59: );
1.135 bowersj2 60:
61: my %iconAltTags =
62: ( 'navmap.correct.gif' => 'Correct',
63: 'navmap.wrong.gif' => 'Incorrect',
64: 'navmap.open.gif' => 'Open' );
1.133 bowersj2 65:
1.136 bowersj2 66: # Defines a status->color mapping, null string means don't color
67: my %colormap =
1.140 bowersj2 68: ( $resObj->NETWORK_FAILURE => '',
69: $resObj->CORRECT => '',
70: $resObj->EXCUSED => '#3333FF',
71: $resObj->PAST_DUE_ANSWER_LATER => '',
72: $resObj->PAST_DUE_NO_ANSWER => '',
73: $resObj->ANSWER_OPEN => '#006600',
74: $resObj->OPEN_LATER => '',
75: $resObj->TRIES_LEFT => '',
76: $resObj->INCORRECT => '',
77: $resObj->OPEN => '',
1.207 bowersj2 78: $resObj->NOTHING_SET => '',
79: $resObj->ATTEMPTED => '',
80: $resObj->ANSWER_SUBMITTED => ''
81: );
1.136 bowersj2 82: # And a special case in the nav map; what to do when the assignment
83: # is not yet done and due in less then 24 hours
84: my $hurryUpColor = "#FF0000";
1.130 www 85:
1.268 albertel 86: sub launch_win {
1.281 albertel 87: my ($mode,$script,$toplinkitems)=@_;
1.268 albertel 88: my $result;
89: if ($script ne 'no') {
90: $result.='<script type="text/javascript">';
91: }
92: $result.='function launch_navmapwin() {
93: newWindow=open(\'/adm/navmaps?launchExternal\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
94: }';
95: if ($mode eq 'now') {
96: $result.="\nlaunch_navmapwin();\n";
97: }
98: if ($script ne 'no') {
99: $result.='</script>';
100: }
101: if ($mode eq 'link') {
1.281 albertel 102: &add_linkitem($toplinkitems,'launchnav','launch_navmapwin()',
103: "Launch navigation window");
1.268 albertel 104: }
105: return $result;
106: }
107:
1.269 albertel 108: sub close {
109: if ($ENV{'environment.remotenavmap'} ne 'on') { return ''; }
110: return(<<ENDCLOSE);
111: <script type="text/javascript">
112: window.status='Accessing Nav Control';
113: menu=window.open("/adm/rat/empty.html","loncapanav",
114: "height=600,width=400,scrollbars=1");
115: window.status='Closing Nav Control';
116: menu.close();
117: window.status='Done.';
118: </script>
119: ENDCLOSE
120: }
1.268 albertel 121:
1.278 albertel 122: sub nav_control_js {
123: my $nav=($ENV{'environment.remotenavmap'} eq 'on');
124: return (<<NAVCONTROL);
125: var w_loncapanav_flag="$nav";
126:
127:
128: function gonav(url) {
129: if (w_loncapanav_flag != 1) {
1.292 albertel 130: gopost(url,'');
1.278 albertel 131: } else {
132: navwindow=window.open(url,
133: "loncapanav","height=600,width=400,scrollbars=1");
134: }
135: }
136: NAVCONTROL
137: }
138:
1.270 albertel 139: sub update {
140: if ($ENV{'environment.remotenavmap'} ne 'on') { return ''; }
141: if (!$ENV{'request.course.id'}) { return ''; }
142: if ($ENV{'REQUEST_URI'}=~m|^/adm/navmaps|) { return ''; }
143: return(<<ENDUPDATE);
144: <form name="navform"></form>
145: <script type="text/javascript">
146: this.document.navform.action='/adm/navmaps#curloc';
147: this.document.navform.target='loncapanav';
148: this.document.navform.submit();
149: </script>
150: ENDUPDATE
151: }
1.268 albertel 152:
1.1 www 153: sub handler {
1.99 bowersj2 154: my $r = shift;
1.118 bowersj2 155: real_handler($r);
156: }
157:
158: sub real_handler {
159: my $r = shift;
1.2 www 160:
1.51 bowersj2 161: # Handle header-only request
162: if ($r->header_only) {
163: if ($ENV{'browser.mathml'}) {
1.232 www 164: &Apache::loncommon::content_type($r,'text/xml');
1.51 bowersj2 165: } else {
1.232 www 166: &Apache::loncommon::content_type($r,'text/html');
1.51 bowersj2 167: }
168: $r->send_http_header;
169: return OK;
170: }
171:
172: # Send header, don't cache this page
173: if ($ENV{'browser.mathml'}) {
1.232 www 174: &Apache::loncommon::content_type($r,'text/xml');
1.51 bowersj2 175: } else {
1.232 www 176: &Apache::loncommon::content_type($r,'text/html');
1.51 bowersj2 177: }
178: &Apache::loncommon::no_cache($r);
179: $r->send_http_header;
180:
1.281 albertel 181: my %toplinkitems=();
182:
1.268 albertel 183: if ($ENV{QUERY_STRING} eq 'collapseExternal') {
184: &Apache::lonnet::put('environment',{'remotenavmap' => 'off'});
185: &Apache::lonnet::appenv('environment.remotenavmap' => 'off');
1.275 albertel 186: my $menu=&Apache::lonmenu::reopenmenu();
187: my $navstatus=&Apache::lonmenu::get_nav_status();
188: if ($menu) {
189: $menu=(<<MENU)
190: swmenu=$menu
191: swmenu.clearTimeout(swmenu.menucltim);
192: $navstatus
193: MENU
1.280 albertel 194: } else {
195: my $nothing = &Apache::lonhtmlcommon::javascript_nothing();
196: my $mainwindow='window.open('.$nothing.',"loncapaclient","",false);';
197: $menu=(<<MENU)
198: swmenu=$mainwindow
199: $navstatus
200: MENU
1.275 albertel 201: }
1.268 albertel 202: $r->print(<<"ENDSUBM");
203: <html>
204: <head>
205: <script type="text/javascript">
206: function submitthis() {
1.275 albertel 207: $menu
1.268 albertel 208: self.close();
209: }
1.275 albertel 210:
1.268 albertel 211: </script>
212: </head>
213: <body bgcolor="#FFFFFF" onLoad="submitthis()"></body>
214: </html>
215: ENDSUBM
216: return;
217: }
218: if ($ENV{QUERY_STRING} eq 'launchExternal') {
219: &Apache::lonnet::put('environment',{'remotenavmap' => 'on'});
220: &Apache::lonnet::appenv('environment.remotenavmap' => 'on');
221: }
222:
1.106 bowersj2 223: # Create the nav map
1.221 bowersj2 224: my $navmap = Apache::lonnavmaps::navmap->new();
1.51 bowersj2 225:
1.55 bowersj2 226: if (!defined($navmap)) {
227: my $requrl = $r->uri;
228: $ENV{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";
229: return HTTP_NOT_ACCEPTABLE;
230: }
1.64 bowersj2 231:
1.111 bowersj2 232: $r->print("<html><head>\n");
1.229 www 233: $r->print("<title>".&mt('Navigate Course Contents')."</title>");
1.150 www 234: # ------------------------------------------------------------ Get query string
1.276 albertel 235: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register','sort','showOnlyHomework']);
1.158 bowersj2 236:
1.150 www 237: # ----------------------------------------------------- Force menu registration
238: my $addentries='';
1.268 albertel 239: my $more_unload;
1.278 albertel 240: my $body_only='';
1.268 albertel 241: if ($ENV{'environment.remotenavmap'} eq 'on') {
242: $r->print('<script type="text/javascript">
243: function collapse() {
244: this.document.location="/adm/navmaps?collapseExternal";
245: }
246: </script>');
247: # FIXME need to be smarter to only catch window close events
248: # $more_unload="collapse()"
1.278 albertel 249: $body_only=1;
1.268 albertel 250: }
1.150 www 251: if ($ENV{'form.register'}) {
1.268 albertel 252: $addentries=' onLoad="'.&Apache::lonmenu::loadevents().
253: '" onUnload="'.&Apache::lonmenu::unloadevents().';'.
254: $more_unload.'"';
255: $r->print(&Apache::lonmenu::registerurl(1));
256: } else {
257: $addentries=' onUnload="'.$more_unload.'"';
1.150 www 258: }
1.111 bowersj2 259:
1.64 bowersj2 260: # Header
1.150 www 261: $r->print('</head>'.
262: &Apache::loncommon::bodytag('Navigate Course Contents','',
1.278 albertel 263: $addentries,$body_only,'',
264: $ENV{'form.register'}));
1.283 raeburn 265: $r->print('<script>window.focus();</script>');
1.265 albertel 266:
1.124 bowersj2 267: $r->rflush();
268:
1.55 bowersj2 269: # Check that it's defined
270: if (!($navmap->courseMapDefined())) {
1.283 raeburn 271: $r->print(&Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT'));
1.55 bowersj2 272: $r->print('<font size="+2" color="red">Coursemap undefined.</font>' .
273: '</body></html>');
274: return OK;
275: }
276:
1.178 bowersj2 277: # See if there's only one map in the top-level, if we don't
278: # already have a filter... if so, automatically display it
1.222 bowersj2 279: # (older code; should use retrieveResources)
1.179 bowersj2 280: if ($ENV{QUERY_STRING} !~ /filter/) {
1.178 bowersj2 281: my $iterator = $navmap->getIterator(undef, undef, undef, 0);
1.222 bowersj2 282: my $curRes;
1.178 bowersj2 283: my $sequenceCount = 0;
284: my $sequenceId;
1.222 bowersj2 285: while ($curRes = $iterator->next()) {
1.178 bowersj2 286: if (ref($curRes) && $curRes->is_sequence()) {
287: $sequenceCount++;
288: $sequenceId = $curRes->map_pc();
1.179 bowersj2 289: }
1.178 bowersj2 290: }
291:
292: if ($sequenceCount == 1) {
293: # The automatic iterator creation in the render call
294: # will pick this up. We know the condition because
295: # the defined($ENV{'form.filter'}) also ensures this
296: # is a fresh call.
297: $ENV{'form.filter'} = "$sequenceId";
1.155 bowersj2 298: }
299: }
300:
1.268 albertel 301: if ($ENV{QUERY_STRING} eq 'launchExternal') {
302: $r->print('
303: <form name="returnwin" action="/adm/flip?postdata=return%3a"
304: method="post" target="loncapaclient">
305: </form>');
306: $r->print('
307: <script type="text/javascript">
308: this.document.returnwin.submit();
309: </script>');
310: }
311:
312: if ($ENV{'environment.remotenavmap'} ne 'on') {
1.281 albertel 313: $r->print(&launch_win('link','yes',\%toplinkitems));
1.268 albertel 314: }
315: if ($ENV{'environment.remotenavmap'} eq 'on') {
1.281 albertel 316: &add_linkitem(\%toplinkitems,'closenav','collapse()',
317: "Close navigation window");
1.268 albertel 318: }
319:
1.191 bowersj2 320: my $jumpToFirstHomework = 0;
1.184 bowersj2 321: # Check to see if the student is jumping to next open, do-able problem
1.281 albertel 322: if ($ENV{QUERY_STRING} =~ /^jumpToFirstHomework/) {
1.191 bowersj2 323: $jumpToFirstHomework = 1;
1.184 bowersj2 324: # Find the next homework problem that they can do.
325: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 326: my $curRes;
1.184 bowersj2 327: my $foundDoableProblem = 0;
328: my $problemRes;
329:
1.222 bowersj2 330: while (($curRes = $iterator->next()) && !$foundDoableProblem) {
1.184 bowersj2 331: if (ref($curRes) && $curRes->is_problem()) {
332: my $status = $curRes->status();
1.191 bowersj2 333: if ($curRes->completable()) {
1.184 bowersj2 334: $problemRes = $curRes;
335: $foundDoableProblem = 1;
336:
337: # Pop open all previous maps
338: my $stack = $iterator->getStack();
339: pop @$stack; # last resource in the stack is the problem
340: # itself, which we don't need in the map stack
341: my @mapPcs = map {$_->map_pc()} @$stack;
342: $ENV{'form.filter'} = join(',', @mapPcs);
343:
344: # Mark as both "here" and "jump"
345: $ENV{'form.postsymb'} = $curRes->symb();
346: }
347: }
348: }
349:
350: # If we found no problems, print a note to that effect.
351: if (!$foundDoableProblem) {
352: $r->print("<font size='+2'>All homework assignments have been completed.</font><br /><br />");
353: }
354: } else {
1.281 albertel 355: &add_linkitem(\%toplinkitems,'firsthomework',
356: 'location.href="navmaps?jumpToFirstHomework"',
1.287 albertel 357: "Show Me My First Homework Problem");
1.184 bowersj2 358: }
359:
1.191 bowersj2 360: my $suppressEmptySequences = 0;
361: my $filterFunc = undef;
1.201 bowersj2 362: my $resource_no_folder_link = 0;
363:
1.191 bowersj2 364: # Display only due homework.
365: my $showOnlyHomework = 0;
1.276 albertel 366: if ($ENV{'form.showOnlyHomework'} eq "1") {
1.191 bowersj2 367: $showOnlyHomework = 1;
368: $suppressEmptySequences = 1;
369: $filterFunc = sub { my $res = shift;
1.201 bowersj2 370: return $res->completable() || $res->is_map();
1.191 bowersj2 371: };
1.281 albertel 372: &add_linkitem(\%toplinkitems,'everything',
1.296 albertel 373: 'location.href="navmaps?sort='.$ENV{'form.sort'}.'"',
1.281 albertel 374: "Show Everything");
1.229 www 375: $r->print("<p><font size='+2'>".&mt("Uncompleted Homework")."</font></p>");
1.191 bowersj2 376: $ENV{'form.filter'} = '';
377: $ENV{'form.condition'} = 1;
1.201 bowersj2 378: $resource_no_folder_link = 1;
1.191 bowersj2 379: } else {
1.281 albertel 380: &add_linkitem(\%toplinkitems,'uncompleted',
381: 'location.href="navmaps?sort='.$ENV{'form.sort'}.
382: '&showOnlyHomework=1"',
383: "Show Only Uncompleted Homework");
1.191 bowersj2 384: }
385:
1.276 albertel 386: my %selected=($ENV{'form.sort'} => 'selected=on');
387: my $sort_html=("<form>
1.270 albertel 388: <nobr>
1.276 albertel 389: <input type=\"hidden\" name=\"showOnlyHomework\" value=\"".$ENV{'form.showOnlyHomework'}."\" />
390: <input type=\"submit\" value=\"".&mt('Sort by:')."\" />
1.270 albertel 391: <select name=\"sort\">
1.276 albertel 392: <option value=\"default\" $selected{'default'}>".&mt('Default')."</option>
393: <option value=\"title\" $selected{'title'} >".&mt('Title')."</option>
394: <option value=\"duedate\" $selected{'duedate'}>".&mt('Duedate')."</option>
1.296 albertel 395: <option value=\"discussion\" $selected{'discussion'}>".&mt('Has Discussion')."</option>
1.270 albertel 396: </select>
397: </nobr>
398: </form>");
1.133 bowersj2 399: # renderer call
1.285 albertel 400: my $renderArgs = { 'cols' => [0,1,2,3],
1.270 albertel 401: 'sort' => $ENV{'form.sort'},
1.191 bowersj2 402: 'url' => '/adm/navmaps',
403: 'navmap' => $navmap,
404: 'suppressNavmap' => 1,
405: 'suppressEmptySequences' => $suppressEmptySequences,
406: 'filterFunc' => $filterFunc,
1.201 bowersj2 407: 'resource_no_folder_link' => $resource_no_folder_link,
1.276 albertel 408: 'sort_html'=> $sort_html,
1.281 albertel 409: 'r' => $r,
410: 'caller' => 'navmapsdisplay',
411: 'linkitems' => \%toplinkitems};
1.191 bowersj2 412: my $render = render($renderArgs);
413: $navmap->untieHashes();
1.133 bowersj2 414:
1.191 bowersj2 415: # If no resources were printed, print a reassuring message so the
416: # user knows there was no error.
417: if ($renderArgs->{'counter'} == 0) {
418: if ($showOnlyHomework) {
1.229 www 419: $r->print("<p><font size='+1'>".&mt("All homework is currently completed").".</font></p>");
1.191 bowersj2 420: } else { # both jumpToFirstHomework and normal use the same: course must be empty
421: $r->print("<p><font size='+1'>This course is empty.</font></p>");
422: }
423: }
1.51 bowersj2 424:
1.128 bowersj2 425: $r->print("</body></html>");
1.134 bowersj2 426: $r->rflush();
1.59 bowersj2 427:
1.51 bowersj2 428: return OK;
429: }
430:
431: # Convenience functions: Returns a string that adds or subtracts
432: # the second argument from the first hash, appropriate for the
433: # query string that determines which folders to recurse on
434: sub addToFilter {
435: my $hashIn = shift;
436: my $addition = shift;
437: my %hash = %$hashIn;
438: $hash{$addition} = 1;
439:
440: return join (",", keys(%hash));
441: }
442:
443: sub removeFromFilter {
444: my $hashIn = shift;
445: my $subtraction = shift;
446: my %hash = %$hashIn;
447:
448: delete $hash{$subtraction};
449: return join(",", keys(%hash));
450: }
451:
452: # Convenience function: Given a stack returned from getStack on the iterator,
453: # return the correct src() value.
454: # Later, this should add an anchor when we start putting anchors in pages.
455: sub getLinkForResource {
456: my $stack = shift;
457: my $res;
458:
459: # Check to see if there are any pages in the stack
460: foreach $res (@$stack) {
1.248 www 461: if (defined($res)) {
462: if ($res->is_page()) {
463: return $res->src();
464: }
465: # in case folder was skipped over as "only sequence"
466: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
467: if ($map=~/\.page$/) {
1.249 www 468: return &Apache::lonnet::clutter($map).'#'.
469: &Apache::lonnet::escape(&Apache::lonnet::declutter($src));
1.248 www 470: }
1.51 bowersj2 471: }
472: }
473:
474: # Failing that, return the src of the last resource that is defined
475: # (when we first recurse on a map, it puts an undefined resource
476: # on the bottom because $self->{HERE} isn't defined yet, and we
477: # want the src for the map anyhow)
478: foreach (@$stack) {
479: if (defined($_)) { $res = $_; }
480: }
481:
482: return $res->src();
483: }
484:
1.251 www 485: # Convenience function: This separates the logic of how to create
1.53 bowersj2 486: # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
1.251 www 487: # etc.) into a separate function. It takes a resource object as the
1.53 bowersj2 488: # first parameter, and the part number of the resource as the second.
489: # It's basically a big switch statement on the status of the resource.
490:
491: sub getDescription {
492: my $res = shift;
493: my $part = shift;
1.69 bowersj2 494: my $status = $res->status($part);
1.53 bowersj2 495:
1.182 bowersj2 496: if ($status == $res->NETWORK_FAILURE) {
1.229 www 497: return &mt("Having technical difficulties; please check status later");
1.182 bowersj2 498: }
1.53 bowersj2 499: if ($status == $res->NOTHING_SET) {
1.229 www 500: return &mt("Not currently assigned.");
1.53 bowersj2 501: }
502: if ($status == $res->OPEN_LATER) {
1.73 bowersj2 503: return "Open " . timeToHumanString($res->opendate($part));
1.53 bowersj2 504: }
505: if ($status == $res->OPEN) {
1.79 bowersj2 506: if ($res->duedate($part)) {
1.229 www 507: return &mt("Due")." " .timeToHumanString($res->duedate($part));
1.66 bowersj2 508: } else {
1.229 www 509: return &mt("Open, no due date");
1.66 bowersj2 510: }
1.53 bowersj2 511: }
1.54 bowersj2 512: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.229 www 513: return &mt("Answer open")." " . timeToHumanString($res->answerdate($part));
1.54 bowersj2 514: }
515: if ($status == $res->PAST_DUE_NO_ANSWER) {
1.229 www 516: return &mt("Was due")." " . timeToHumanString($res->duedate($part));
1.53 bowersj2 517: }
518: if ($status == $res->ANSWER_OPEN) {
1.229 www 519: return &mt("Answer available");
1.53 bowersj2 520: }
1.59 bowersj2 521: if ($status == $res->EXCUSED) {
1.229 www 522: return &mt("Excused by instructor");
1.59 bowersj2 523: }
1.69 bowersj2 524: if ($status == $res->ATTEMPTED) {
1.229 www 525: return &mt("Answer submitted, not yet graded");
1.69 bowersj2 526: }
1.59 bowersj2 527: if ($status == $res->TRIES_LEFT) {
1.79 bowersj2 528: my $tries = $res->tries($part);
529: my $maxtries = $res->maxtries($part);
530: my $triesString = "";
531: if ($tries && $maxtries) {
532: $triesString = "<font size=\"-1\"><i>($tries of $maxtries tries used)</i></font>";
533: if ($maxtries > 1 && $maxtries - $tries == 1) {
534: $triesString = "<b>$triesString</b>";
535: }
536: }
1.244 albertel 537: if ($res->duedate($part)) {
1.229 www 538: return &mt("Due")." " . timeToHumanString($res->duedate($part)) .
1.66 bowersj2 539: " $triesString";
540: } else {
1.229 www 541: return &mt("No due date")." $triesString";
1.66 bowersj2 542: }
1.59 bowersj2 543: }
1.185 bowersj2 544: if ($status == $res->ANSWER_SUBMITTED) {
1.229 www 545: return &mt('Answer submitted');
1.185 bowersj2 546: }
1.53 bowersj2 547: }
548:
1.115 bowersj2 549: # Convenience function, so others can use it: Is the problem due in less then
550: # 24 hours, and still can be done?
551:
1.252 matthew 552: sub dueInLessThan24Hours {
1.115 bowersj2 553: my $res = shift;
554: my $part = shift;
555: my $status = $res->status($part);
556:
1.207 bowersj2 557: return ($status == $res->OPEN() ||
1.115 bowersj2 558: $status == $res->TRIES_LEFT()) &&
1.244 albertel 559: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
560: $res->duedate($part) > time();
1.115 bowersj2 561: }
562:
563: # Convenience function, so others can use it: Is there only one try remaining for the
564: # part, with more then one try to begin with, not due yet and still can be done?
565: sub lastTry {
566: my $res = shift;
567: my $part = shift;
568:
569: my $tries = $res->tries($part);
570: my $maxtries = $res->maxtries($part);
571: return $tries && $maxtries && $maxtries > 1 &&
1.244 albertel 572: $maxtries - $tries == 1 && $res->duedate($part) &&
573: $res->duedate($part) > time();
1.115 bowersj2 574: }
575:
1.101 bowersj2 576: # This puts a human-readable name on the ENV variable.
1.177 www 577:
1.68 bowersj2 578: sub advancedUser {
1.177 www 579: return $ENV{'request.role.adv'};
1.68 bowersj2 580: }
581:
1.73 bowersj2 582:
583: # timeToHumanString takes a time number and converts it to a
584: # human-readable representation, meant to be used in the following
585: # manner:
586: # print "Due $timestring"
587: # print "Open $timestring"
588: # print "Answer available $timestring"
589: # Very, very, very, VERY English-only... goodness help a localizer on
590: # this func...
1.53 bowersj2 591: sub timeToHumanString {
1.58 albertel 592: my ($time) = @_;
593: # zero, '0' and blank are bad times
1.73 bowersj2 594: if (!$time) {
1.229 www 595: return &mt('never');
1.73 bowersj2 596: }
1.231 www 597: unless (&Apache::lonlocal::current_language()=~/^en/) {
1.237 www 598: return &Apache::lonlocal::locallocaltime($time);
1.229 www 599: }
1.73 bowersj2 600: my $now = time();
601:
602: my @time = localtime($time);
603: my @now = localtime($now);
604:
605: # Positive = future
606: my $delta = $time - $now;
607:
608: my $minute = 60;
609: my $hour = 60 * $minute;
610: my $day = 24 * $hour;
611: my $week = 7 * $day;
612: my $inPast = 0;
613:
614: # Logic in comments:
615: # Is it now? (extremely unlikely)
616: if ( $delta == 0 ) {
617: return "this instant";
618: }
619:
620: if ($delta < 0) {
621: $inPast = 1;
622: $delta = -$delta;
623: }
624:
625: if ( $delta > 0 ) {
1.101 bowersj2 626:
1.73 bowersj2 627: my $tense = $inPast ? " ago" : "";
628: my $prefix = $inPast ? "" : "in ";
1.101 bowersj2 629:
630: # Less then a minute
1.73 bowersj2 631: if ( $delta < $minute ) {
632: if ($delta == 1) { return "${prefix}1 second$tense"; }
633: return "$prefix$delta seconds$tense";
634: }
635:
1.101 bowersj2 636: # Less then an hour
1.73 bowersj2 637: if ( $delta < $hour ) {
638: # If so, use minutes
639: my $minutes = floor($delta / 60);
640: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
641: return "$prefix$minutes minutes$tense";
642: }
643:
644: # Is it less then 24 hours away? If so,
645: # display hours + minutes
646: if ( $delta < $hour * 24) {
647: my $hours = floor($delta / $hour);
648: my $minutes = floor(($delta % $hour) / $minute);
649: my $hourString = "$hours hours";
650: my $minuteString = ", $minutes minutes";
651: if ($hours == 1) {
652: $hourString = "1 hour";
653: }
654: if ($minutes == 1) {
655: $minuteString = ", 1 minute";
656: }
657: if ($minutes == 0) {
658: $minuteString = "";
659: }
660: return "$prefix$hourString$minuteString$tense";
661: }
662:
663: # Less then 5 days away, display day of the week and
664: # HH:MM
665: if ( $delta < $day * 5 ) {
1.85 bowersj2 666: my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
1.238 albertel 667: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 668: $timeStr =~ s/12:00 pm/noon/;
669: return ($inPast ? "last " : "next ") .
670: $timeStr;
671: }
672:
673: # Is it this year?
674: if ( $time[5] == $now[5]) {
675: # Return on Month Day, HH:MM meridian
676: my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));
1.238 albertel 677: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 678: $timeStr =~ s/12:00 pm/noon/;
679: return $timeStr;
680: }
681:
682: # Not this year, so show the year
1.279 albertel 683: my $timeStr = strftime("on %A, %b %e %Y at %I:%M %P", localtime($time));
1.238 albertel 684: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 685: $timeStr =~ s/12:00 pm/noon/;
686: return $timeStr;
1.58 albertel 687: }
1.53 bowersj2 688: }
689:
1.51 bowersj2 690:
1.133 bowersj2 691: =pod
692:
1.174 albertel 693: =head1 NAME
694:
1.217 bowersj2 695: Apache::lonnavmap - Subroutines to handle and render the navigation
696: maps
1.174 albertel 697:
698: =head1 SYNOPSIS
699:
700: The main handler generates the navigational listing for the course,
701: the other objects export this information in a usable fashion for
1.205 bowersj2 702: other modules.
1.133 bowersj2 703:
1.216 bowersj2 704: =head1 OVERVIEW
705:
1.217 bowersj2 706: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
1.218 bowersj2 707: course structure and caches it in what is often referred to as the
708: "big hash" X<big hash>. You can see it if you are logged into
709: LON-CAPA, in a course, by going to /adm/test. (You may need to
710: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
711: content of the hash will be under the heading "Big Hash".
1.216 bowersj2 712:
713: Big Hash contains, among other things, how resources are related
714: to each other (next/previous), what resources are maps, which
715: resources are being chosen to not show to the student (for random
716: selection), and a lot of other things that can take a lot of time
717: to compute due to the amount of data that needs to be collected and
718: processed.
719:
720: Apache::lonnavmaps provides an object model for manipulating this
721: information in a higher-level fashion then directly manipulating
722: the hash. It also provides access to several auxilary functions
723: that aren't necessarily stored in the Big Hash, but are a per-
724: resource sort of value, like whether there is any feedback on
725: a given resource.
726:
727: Apache::lonnavmaps also abstracts away branching, and someday,
728: conditions, for the times where you don't really care about those
729: things.
730:
731: Apache::lonnavmaps also provides fairly powerful routines for
732: rendering navmaps, and last but not least, provides the navmaps
733: view for when the user clicks the NAV button.
734:
735: B<Note>: Apache::lonnavmaps I<only> works for the "currently
736: logged in user"; if you want things like "due dates for another
737: student" lonnavmaps can not directly retrieve information like
738: that. You need the EXT function. This module can still help,
739: because many things, such as the course structure, are constant
740: between users, and Apache::lonnavmaps can help by providing
741: symbs for the EXT call.
742:
743: The rest of this file will cover the provided rendering routines,
744: which can often be used without fiddling with the navmap object at
745: all, then documents the Apache::lonnavmaps::navmap object, which
746: is the key to accessing the Big Hash information, covers the use
747: of the Iterator (which provides the logic for traversing the
748: somewhat-complicated Big Hash data structure), documents the
749: Apache::lonnavmaps::Resource objects that are returned by
750:
1.205 bowersj2 751: =head1 Subroutine: render
1.133 bowersj2 752:
1.174 albertel 753: The navmap renderer package provides a sophisticated rendering of the
754: standard navigation maps interface into HTML. The provided nav map
755: handler is actually just a glorified call to this.
1.133 bowersj2 756:
1.216 bowersj2 757: Because of the large number of parameters this function accepts,
1.174 albertel 758: instead of passing it arguments as is normal, pass it in an anonymous
1.216 bowersj2 759: hash with the desired options.
1.174 albertel 760:
761: The package provides a function called 'render', called as
1.205 bowersj2 762: Apache::lonnavmaps::render({}).
1.51 bowersj2 763:
1.133 bowersj2 764: =head2 Overview of Columns
1.51 bowersj2 765:
1.174 albertel 766: The renderer will build an HTML table for the navmap and return
767: it. The table is consists of several columns, and a row for each
768: resource (or possibly each part). You tell the renderer how many
769: columns to create and what to place in each column, optionally using
1.205 bowersj2 770: one or more of the prepared columns, and the renderer will assemble
1.174 albertel 771: the table.
772:
773: Any additional generally useful column types should be placed in the
774: renderer code here, so anybody can use it anywhere else. Any code
775: specific to the current application (such as the addition of <input>
776: elements in a column) should be placed in the code of the thing using
777: the renderer.
778:
779: At the core of the renderer is the array reference COLS (see Example
780: section below for how to pass this correctly). The COLS array will
781: consist of entries of one of two types of things: Either an integer
782: representing one of the pre-packaged column types, or a sub reference
783: that takes a resource reference, a part number, and a reference to the
784: argument hash passed to the renderer, and returns a string that will
785: be inserted into the HTML representation as it.
786:
1.216 bowersj2 787: All other parameters are ways of either changing how the columns
788: are printing, or which rows are shown.
789:
1.174 albertel 790: The pre-packaged column names are refered to by constants in the
1.205 bowersj2 791: Apache::lonnavmaps namespace. The following currently exist:
1.51 bowersj2 792:
1.174 albertel 793: =over 4
1.51 bowersj2 794:
1.216 bowersj2 795: =item * B<Apache::lonnavmaps::resource>:
1.51 bowersj2 796:
1.174 albertel 797: The general info about the resource: Link, icon for the type, etc. The
1.216 bowersj2 798: first column in the standard nav map display. This column provides the
799: indentation effect seen in the B<NAV> screen. This column also accepts
1.205 bowersj2 800: the following parameters in the renderer hash:
1.51 bowersj2 801:
1.133 bowersj2 802: =over 4
1.51 bowersj2 803:
1.216 bowersj2 804: =item * B<resource_nolink>: default false
1.51 bowersj2 805:
1.216 bowersj2 806: If true, the resource will not be linked. By default, all non-folder
807: resources are linked.
1.174 albertel 808:
1.216 bowersj2 809: =item * B<resource_part_count>: default true
1.51 bowersj2 810:
1.216 bowersj2 811: If true, the resource will show a part count B<if> the full
812: part list is not displayed. (See "condense_parts" later.) If false,
813: the resource will never show a part count.
1.133 bowersj2 814:
1.174 albertel 815: =item * B<resource_no_folder_link>:
1.133 bowersj2 816:
1.174 albertel 817: If true, the resource's folder will not be clickable to open or close
818: it. Default is false. True implies printCloseAll is false, since you
819: can't close or open folders when this is on anyhow.
1.144 bowersj2 820:
1.133 bowersj2 821: =back
1.51 bowersj2 822:
1.225 bowersj2 823: =item * B<Apache::lonnavmaps::communication_status>:
1.174 albertel 824:
825: Whether there is discussion on the resource, email for the user, or
826: (lumped in here) perl errors in the execution of the problem. This is
827: the second column in the main nav map.
828:
1.225 bowersj2 829: =item * B<Apache::lonnavmaps::quick_status>:
1.51 bowersj2 830:
1.216 bowersj2 831: An icon for the status of a problem, with five possible states:
832: Correct, incorrect, open, awaiting grading (for a problem where the
833: computer's grade is suppressed, or the computer can't grade, like
834: essay problem), or none (not open yet, not a problem). The
1.174 albertel 835: third column of the standard navmap.
1.51 bowersj2 836:
1.225 bowersj2 837: =item * B<Apache::lonnavmaps::long_status>:
1.174 albertel 838:
839: A text readout of the details of the current status of the problem,
840: such as "Due in 22 hours". The fourth column of the standard navmap.
1.51 bowersj2 841:
1.225 bowersj2 842: =item * B<Apache::lonnavmaps::part_status_summary>:
843:
844: A text readout summarizing the status of the problem. If it is a
845: single part problem, will display "Correct", "Incorrect",
846: "Not yet open", "Open", "Attempted", or "Error". If there are
847: multiple parts, this will output a string that in HTML will show a
848: status of how many parts are in each status, in color coding, trying
849: to match the colors of the icons within reason.
850:
851: Note this only makes sense if you are I<not> showing parts. If
852: C<showParts> is true (see below), this column will not output
853: anything.
854:
1.133 bowersj2 855: =back
1.51 bowersj2 856:
1.133 bowersj2 857: If you add any others please be sure to document them here.
1.51 bowersj2 858:
1.174 albertel 859: An example of a column renderer that will show the ID number of a
860: resource, along with the part name if any:
1.51 bowersj2 861:
1.133 bowersj2 862: sub {
863: my ($resource, $part, $params) = @_;
864: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
865: return '<td>' . $resource->{ID} . '</td>';
866: }
1.51 bowersj2 867:
1.174 albertel 868: Note these functions are responsible for the TD tags, which allow them
869: to override vertical and horizontal alignment, etc.
1.130 www 870:
1.133 bowersj2 871: =head2 Parameters
1.115 bowersj2 872:
1.217 bowersj2 873: Minimally, you should be
1.174 albertel 874: able to get away with just using 'cols' (to specify the columns
875: shown), 'url' (necessary for the folders to link to the current screen
876: correctly), and possibly 'queryString' if your app calls for it. In
877: that case, maintaining the state of the folders will be done
878: automatically.
1.140 bowersj2 879:
1.133 bowersj2 880: =over 4
1.51 bowersj2 881:
1.216 bowersj2 882: =item * B<iterator>: default: constructs one from %ENV
1.174 albertel 883:
884: A reference to a fresh ::iterator to use from the navmaps. The
885: rendering will reflect the options passed to the iterator, so you can
886: use that to just render a certain part of the course, if you like. If
887: one is not passed, the renderer will attempt to construct one from
888: ENV{'form.filter'} and ENV{'form.condition'} information, plus the
889: 'iterator_map' parameter if any.
890:
1.216 bowersj2 891: =item * B<iterator_map>: default: not used
1.174 albertel 892:
893: If you are letting the renderer do the iterator handling, you can
894: instruct the renderer to render only a particular map by passing it
895: the source of the map you want to process, like
896: '/res/103/jerf/navmap.course.sequence'.
897:
1.216 bowersj2 898: =item * B<navmap>: default: constructs one from %ENV
1.174 albertel 899:
900: A reference to a navmap, used only if an iterator is not passed in. If
901: this is necessary to make an iterator but it is not passed in, a new
902: one will be constructed based on ENV info. This is useful to do basic
903: error checking before passing it off to render.
904:
1.216 bowersj2 905: =item * B<r>: default: must be passed in
1.174 albertel 906:
907: The standard Apache response object. This must be passed to the
908: renderer or the course hash will be locked.
909:
1.216 bowersj2 910: =item * B<cols>: default: empty (useless)
1.174 albertel 911:
912: An array reference
913:
1.216 bowersj2 914: =item * B<showParts>:default true
1.174 albertel 915:
1.216 bowersj2 916: A flag. If true, a line for the resource itself, and a line
1.174 albertel 917: for each part will be displayed. If not, only one line for each
918: resource will be displayed.
919:
1.216 bowersj2 920: =item * B<condenseParts>: default true
1.174 albertel 921:
1.216 bowersj2 922: A flag. If true, if all parts of the problem have the same
1.174 albertel 923: status and that status is Nothing Set, Correct, or Network Failure,
924: then only one line will be displayed for that resource anyhow. If no,
925: all parts will always be displayed. If showParts is 0, this is
926: ignored.
927:
1.216 bowersj2 928: =item * B<jumpCount>: default: determined from %ENV
1.174 albertel 929:
1.216 bowersj2 930: A string identifying the URL to place the anchor 'curloc' at.
931: It is the responsibility of the renderer user to
1.174 albertel 932: ensure that the #curloc is in the URL. By default, determined through
933: the use of the ENV{} 'jump' information, and should normally "just
934: work" correctly.
1.144 bowersj2 935:
1.216 bowersj2 936: =item * B<here>: default: empty string
1.140 bowersj2 937:
1.216 bowersj2 938: A Symb identifying where to place the 'here' marker. The empty
939: string means no marker.
1.92 bowersj2 940:
1.216 bowersj2 941: =item * B<indentString>: default: 25 pixel whitespace image
1.164 bowersj2 942:
1.216 bowersj2 943: A string identifying the indentation string to use.
1.92 bowersj2 944:
1.216 bowersj2 945: =item * B<queryString>: default: empty
1.51 bowersj2 946:
1.174 albertel 947: A string which will be prepended to the query string used when the
1.216 bowersj2 948: folders are opened or closed. You can use this to pass
949: application-specific values.
1.55 bowersj2 950:
1.216 bowersj2 951: =item * B<url>: default: none
1.84 bowersj2 952:
1.174 albertel 953: The url the folders will link to, which should be the current
1.216 bowersj2 954: page. Required if the resource info column is shown, and you
955: are allowing the user to open and close folders.
1.115 bowersj2 956:
1.216 bowersj2 957: =item * B<currentJumpIndex>: default: no jumping
1.55 bowersj2 958:
1.174 albertel 959: Describes the currently-open row number to cause the browser to jump
960: to, because the user just opened that folder. By default, pulled from
961: the Jump information in the ENV{'form.*'}.
1.51 bowersj2 962:
1.216 bowersj2 963: =item * B<printKey>: default: false
1.51 bowersj2 964:
1.174 albertel 965: If true, print the key that appears on the top of the standard
1.216 bowersj2 966: navmaps.
1.139 bowersj2 967:
1.216 bowersj2 968: =item * B<printCloseAll>: default: true
1.140 bowersj2 969:
1.174 albertel 970: If true, print the "Close all folders" or "open all folders"
1.216 bowersj2 971: links.
1.140 bowersj2 972:
1.216 bowersj2 973: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.153 bowersj2 974:
1.174 albertel 975: A function that takes the resource object as its only parameter and
976: returns a true or false value. If true, the resource is displayed. If
1.216 bowersj2 977: false, it is simply skipped in the display.
1.174 albertel 978:
1.216 bowersj2 979: =item * B<suppressEmptySequences>: default: false
1.190 bowersj2 980:
981: If you're using a filter function, and displaying sequences to orient
982: the user, then frequently some sequences will be empty. Setting this to
983: true will cause those sequences not to display, so as not to confuse the
984: user into thinking that if the sequence is there there should be things
1.216 bowersj2 985: under it; for example, see the "Show Uncompleted Homework" view on the
986: B<NAV> screen.
1.190 bowersj2 987:
1.216 bowersj2 988: =item * B<suppressNavmaps>: default: false
1.174 albertel 989:
1.216 bowersj2 990: If true, will not display Navigate Content resources.
1.143 bowersj2 991:
1.133 bowersj2 992: =back
1.51 bowersj2 993:
1.133 bowersj2 994: =head2 Additional Info
1.51 bowersj2 995:
1.174 albertel 996: In addition to the parameters you can pass to the renderer, which will
997: be passed through unchange to the column renderers, the renderer will
998: generate the following information which your renderer may find
999: useful:
1000:
1.216 bowersj2 1001: =over 4
1002:
1003: =item * B<counter>:
1.145 bowersj2 1004:
1.216 bowersj2 1005: Contains the number of rows printed. Useful after calling the render
1006: function, as you can detect whether anything was printed at all.
1007:
1008: =item * B<isNewBranch>:
1009:
1010: Useful for renderers: If this resource is currently the first resource
1011: of a new branch, this will be true. The Resource column (leftmost in the
1012: navmaps screen) uses this to display the "new branch" icon
1.59 bowersj2 1013:
1.133 bowersj2 1014: =back
1.59 bowersj2 1015:
1.133 bowersj2 1016: =cut
1.59 bowersj2 1017:
1.133 bowersj2 1018: sub resource { return 0; }
1019: sub communication_status { return 1; }
1020: sub quick_status { return 2; }
1021: sub long_status { return 3; }
1.225 bowersj2 1022: sub part_status_summary { return 4; }
1.51 bowersj2 1023:
1.133 bowersj2 1024: sub render_resource {
1025: my ($resource, $part, $params) = @_;
1.51 bowersj2 1026:
1.133 bowersj2 1027: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 1028:
1.134 bowersj2 1029: my $link = $params->{"resourceLink"};
1030: my $src = $resource->src();
1031: my $it = $params->{"iterator"};
1.133 bowersj2 1032: my $filter = $it->{FILTER};
1033:
1034: my $title = $resource->compTitle();
1.258 albertel 1035:
1.133 bowersj2 1036: my $partLabel = "";
1037: my $newBranchText = "";
1038:
1039: # If this is a new branch, label it so
1040: if ($params->{'isNewBranch'}) {
1041: $newBranchText = "<img src='/adm/lonIcons/branch.gif' border='0' />";
1.51 bowersj2 1042: }
1043:
1.133 bowersj2 1044: # links to open and close the folder
1045: my $linkopen = "<a href='$link'>";
1046: my $linkclose = "</a>";
1.51 bowersj2 1047:
1.204 albertel 1048: # Default icon: unknown page
1049: my $icon = "<img src='/adm/lonIcons/unknown.gif' alt='' border='0' />";
1.133 bowersj2 1050:
1051: if ($resource->is_problem()) {
1.192 bowersj2 1052: if ($part eq '0' || $params->{'condensed'}) {
1.133 bowersj2 1053: $icon = '<img src="/adm/lonIcons/problem.gif" alt="" border="0" />';
1054: } else {
1055: $icon = $params->{'indentString'};
1056: }
1.204 albertel 1057: } else {
1.243 albertel 1058: $icon = "<img src='".&Apache::loncommon::icon($resource->src).
1059: "' alt='' border='0' />";
1.133 bowersj2 1060: }
1.51 bowersj2 1061:
1.133 bowersj2 1062: # Display the correct map icon to open or shut map
1063: if ($resource->is_map()) {
1064: my $mapId = $resource->map_pc();
1065: my $nowOpen = !defined($filter->{$mapId});
1066: if ($it->{CONDITION}) {
1067: $nowOpen = !$nowOpen;
1068: }
1.144 bowersj2 1069:
1.205 bowersj2 1070: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1071:
1.144 bowersj2 1072: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 1073: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.144 bowersj2 1074: $icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";
1075:
1076: $linkopen = "<a href='" . $params->{'url'} . '?' .
1077: $params->{'queryString'} . '&filter=';
1078: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
1079: addToFilter($filter, $mapId) :
1080: removeFromFilter($filter, $mapId);
1081: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
1082: . $params->{'hereType'} . '&here=' .
1083: &Apache::lonnet::escape($params->{'here'}) .
1.159 bowersj2 1084: '&jump=' .
1.144 bowersj2 1085: &Apache::lonnet::escape($resource->symb()) .
1086: "&folderManip=1'>";
1087: } else {
1088: # Don't allow users to manipulate folder
1.205 bowersj2 1089: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
1.144 bowersj2 1090: '.nomanip.gif';
1091: $icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";
1092:
1093: $linkopen = "";
1094: $linkclose = "";
1095: }
1.133 bowersj2 1096: }
1.51 bowersj2 1097:
1.133 bowersj2 1098: if ($resource->randomout()) {
1099: $nonLinkedText .= ' <i>(hidden)</i> ';
1100: }
1101:
1102: # We're done preparing and finally ready to start the rendering
1103: my $result = "<td align='left' valign='center'>";
1.140 bowersj2 1104:
1105: my $indentLevel = $params->{'indentLevel'};
1106: if ($newBranchText) { $indentLevel--; }
1107:
1.133 bowersj2 1108: # print indentation
1.140 bowersj2 1109: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 1110: $result .= $params->{'indentString'};
1.84 bowersj2 1111: }
1112:
1.133 bowersj2 1113: # Decide what to display
1114: $result .= "$newBranchText$linkopen$icon$linkclose";
1115:
1116: my $curMarkerBegin = '';
1117: my $curMarkerEnd = '';
1.51 bowersj2 1118:
1.133 bowersj2 1119: # Is this the current resource?
1.158 bowersj2 1120: if (!$params->{'displayedHereMarker'} &&
1121: $resource->symb() eq $params->{'here'} ) {
1.133 bowersj2 1122: $curMarkerBegin = '<font color="red" size="+2">> </font>';
1123: $curMarkerEnd = '<font color="red" size="+2"><</font>';
1.158 bowersj2 1124: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 1125: }
1126:
1.192 bowersj2 1127: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 1128: !$params->{'condensed'}) {
1.274 matthew 1129: my $displaypart=$resource->part_display($part);
1.245 www 1130: $partLabel = " (Part: $displaypart)";
1131: $link.='#'.&Apache::lonnet::escape($part);
1.133 bowersj2 1132: $title = "";
1.51 bowersj2 1133: }
1134:
1.163 bowersj2 1135: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.133 bowersj2 1136: $nonLinkedText .= ' (' . $resource->countParts() . ' parts)';
1.51 bowersj2 1137: }
1138:
1.268 albertel 1139: my $target;
1140: if ($ENV{'environment.remotenavmap'} eq 'on') {
1141: $target=' target="loncapaclient" ';
1142: }
1.266 raeburn 1143: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.268 albertel 1144: $result .= " $curMarkerBegin<a $target href='$link'>$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
1.144 bowersj2 1145: } else {
1146: $result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
1147: }
1.51 bowersj2 1148:
1.133 bowersj2 1149: return $result;
1150: }
1.51 bowersj2 1151:
1.133 bowersj2 1152: sub render_communication_status {
1153: my ($resource, $part, $params) = @_;
1.134 bowersj2 1154: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1155:
1156: my $link = $params->{"resourceLink"};
1157: my $linkopen = "<a href='$link'>";
1158: my $linkclose = "</a>";
1159:
1160: if ($resource->hasDiscussion()) {
1161: $discussionHTML = $linkopen .
1162: '<img border="0" src="/adm/lonMisc/chat.gif" />' .
1163: $linkclose;
1164: }
1165:
1166: if ($resource->getFeedback()) {
1167: my $feedback = $resource->getFeedback();
1168: foreach (split(/\,/, $feedback)) {
1169: if ($_) {
1170: $feedbackHTML .= ' <a href="/adm/email?display='
1171: . &Apache::lonnet::escape($_) . '">'
1172: . '<img src="/adm/lonMisc/feedback.gif" '
1173: . 'border="0" /></a>';
1174: }
1175: }
1176: }
1177:
1178: if ($resource->getErrors()) {
1179: my $errors = $resource->getErrors();
1.254 matthew 1180: my $errorcount = 0;
1.134 bowersj2 1181: foreach (split(/,/, $errors)) {
1.254 matthew 1182: last if ($errorcount>=10); # Only output 10 bombs maximum
1.134 bowersj2 1183: if ($_) {
1.254 matthew 1184: $errorcount++;
1.134 bowersj2 1185: $errorHTML .= ' <a href="/adm/email?display='
1186: . &Apache::lonnet::escape($_) . '">'
1187: . '<img src="/adm/lonMisc/bomb.gif" '
1188: . 'border="0" /></a>';
1189: }
1190: }
1.197 bowersj2 1191: }
1192:
1193: if ($params->{'multipart'} && $part != '0') {
1194: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 1195: }
1196:
1197: return "<td width=\"75\" align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML$errorHTML </td>";
1198:
1.133 bowersj2 1199: }
1200: sub render_quick_status {
1201: my ($resource, $part, $params) = @_;
1.135 bowersj2 1202: my $result = "";
1203: my $firstDisplayed = !$params->{'condensed'} &&
1204: $params->{'multipart'} && $part eq "0";
1205:
1206: my $link = $params->{"resourceLink"};
1207: my $linkopen = "<a href='$link'>";
1208: my $linkclose = "</a>";
1209:
1210: if ($resource->is_problem() &&
1211: !$firstDisplayed) {
1.224 bowersj2 1212:
1213: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 1214: my $alt = $iconAltTags{$icon};
1215: if ($icon) {
1216: $result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='/adm/lonIcons/$icon' border='0' alt='$alt' />$linkclose</td>\n";
1217: } else {
1218: $result .= "<td width='30'> </td>\n";
1219: }
1220: } else { # not problem, no icon
1221: $result .= "<td width='30'> </td>\n";
1222: }
1223:
1224: return $result;
1.133 bowersj2 1225: }
1226: sub render_long_status {
1227: my ($resource, $part, $params) = @_;
1.136 bowersj2 1228: my $result = "<td align='right' valign='center'>\n";
1229: my $firstDisplayed = !$params->{'condensed'} &&
1230: $params->{'multipart'} && $part eq "0";
1231:
1232: my $color;
1.212 bowersj2 1233: if ($resource->is_problem()) {
1.136 bowersj2 1234: $color = $colormap{$resource->status};
1235:
1.252 matthew 1236: if (dueInLessThan24Hours($resource, $part) ||
1.136 bowersj2 1237: lastTry($resource, $part)) {
1238: $color = $hurryUpColor;
1239: }
1240: }
1241:
1242: if ($resource->kind() eq "res" &&
1243: $resource->is_problem() &&
1244: !$firstDisplayed) {
1245: if ($color) {$result .= "<font color=\"$color\"><b>"; }
1246: $result .= getDescription($resource, $part);
1247: if ($color) {$result .= "</b></font>"; }
1248: }
1249: if ($resource->is_map() && advancedUser() && $resource->randompick()) {
1250: $result .= '(randomly select ' . $resource->randompick() .')';
1251: }
1.210 bowersj2 1252:
1.213 bowersj2 1253: # Debugging code
1254: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1255: # ' - Part: ' . $part;
1256:
1.210 bowersj2 1257: $result .= "</td>\n";
1.136 bowersj2 1258:
1259: return $result;
1.51 bowersj2 1260: }
1261:
1.227 bowersj2 1262: # Colors obtained by taking the icons, matching the colors, and
1263: # possibly reducing the Value (HSV) of the color, if it's too bright
1264: # for text, generally by one third or so.
1.225 bowersj2 1265: my %statusColors =
1266: (
1267: $resObj->CLOSED => '#000000',
1.227 bowersj2 1268: $resObj->OPEN => '#998b13',
1269: $resObj->CORRECT => '#26933f',
1270: $resObj->INCORRECT => '#c48207',
1271: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1272: $resObj->ERROR => '#000000'
1273: );
1274: my %statusStrings =
1275: (
1276: $resObj->CLOSED => 'Not yet open',
1277: $resObj->OPEN => 'Open',
1278: $resObj->CORRECT => 'Correct',
1279: $resObj->INCORRECT => 'Incorrect',
1280: $resObj->ATTEMPTED => 'Attempted',
1281: $resObj->ERROR => 'Network Error'
1282: );
1283: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1284:
1285: use Data::Dumper;
1286: sub render_parts_summary_status {
1287: my ($resource, $part, $params) = @_;
1.256 albertel 1288: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1289: if ($params->{showParts}) {
1290: return '<td></td>';
1291: }
1292:
1293: my $td = "<td align='right'>\n";
1294: my $endtd = "</td>\n";
1.256 albertel 1295: my @probs;
1.225 bowersj2 1296:
1.256 albertel 1297: if ($resource->contains_problem) {
1298: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1299: } else {
1300: @probs=($resource);
1301: }
1302: my $return;
1303: my %overallstatus;
1304: my $totalParts;
1305: foreach my $resource (@probs) {
1306: # If there is a single part, just show the simple status
1307: if ($resource->singlepart()) {
1308: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1309: $overallstatus{$status}++;
1310: $totalParts++;
1311: next;
1312: }
1313: # Now we can be sure the $part doesn't really matter.
1314: my $statusCount = $resource->simpleStatusCount();
1315: my @counts;
1316: foreach my $status (@statuses) {
1317: # decouple display order from the simpleStatusCount order
1318: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1319: if ($statusCount->[$slot]) {
1320: $overallstatus{$status}+=$statusCount->[$slot];
1321: $totalParts+=$statusCount->[$slot];
1322: }
1323: }
1324: }
1325: $return.= $td . $totalParts . ' parts: ';
1326: foreach my $status (@statuses) {
1327: if ($overallstatus{$status}) {
1328: $return.="<font color='" . $statusColors{$status} .
1329: "'>" . $overallstatus{$status} . ' '
1.225 bowersj2 1330: . $statusStrings{$status} . "</font>";
1331: }
1332: }
1.256 albertel 1333: $return.= $endtd;
1334: return $return;
1.225 bowersj2 1335: }
1336:
1.133 bowersj2 1337: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1338: \&render_quick_status, \&render_long_status,
1339: \&render_parts_summary_status);
1.132 bowersj2 1340:
1341: sub setDefault {
1342: my ($val, $default) = @_;
1343: if (!defined($val)) { return $default; }
1344: return $val;
1345: }
1346:
1.296 albertel 1347: sub cmp_title {
1348: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1349: $atitle=~s/^\s*//;
1350: $btitle=~s/^\s*//;
1351: return $atitle cmp $btitle;
1352: }
1353:
1.132 bowersj2 1354: sub render {
1355: my $args = shift;
1.140 bowersj2 1356: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1357: my $result = '';
1358:
1.132 bowersj2 1359: # Configure the renderer.
1360: my $cols = $args->{'cols'};
1361: if (!defined($cols)) {
1362: # no columns, no nav maps.
1363: return '';
1364: }
1.140 bowersj2 1365: my $mustCloseNavMap = 0;
1366: my $navmap;
1367: if (defined($args->{'navmap'})) {
1368: $navmap = $args->{'navmap'};
1369: }
1370:
1.158 bowersj2 1371: my $r = $args->{'r'};
1.140 bowersj2 1372: my $queryString = $args->{'queryString'};
1.159 bowersj2 1373: my $jump = $args->{'jump'};
1.158 bowersj2 1374: my $here = $args->{'here'};
1.153 bowersj2 1375: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1376: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1377: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1378: # before the current resource when using #current
1379:
1380: # If we were passed 'here' information, we are not rendering
1381: # after a folder manipulation, and we were not passed an
1382: # iterator, make sure we open the folders to show the "here"
1383: # marker
1384: my $filterHash = {};
1385: # Figure out what we're not displaying
1386: foreach (split(/\,/, $ENV{"form.filter"})) {
1387: if ($_) {
1388: $filterHash->{$_} = "1";
1389: }
1390: }
1391:
1.191 bowersj2 1392: # Filter: Remember filter function and add our own filter: Refuse
1393: # to show hidden resources unless the user can see them.
1394: my $userCanSeeHidden = advancedUser();
1395: my $filterFunc = setDefault($args->{'filterFunc'},
1396: sub {return 1;});
1397: if (!$userCanSeeHidden) {
1398: # Without renaming the filterfunc, the server seems to go into
1399: # an infinite loop
1400: my $oldFilterFunc = $filterFunc;
1401: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1402: &$oldFilterFunc($res);};
1403: }
1404:
1.140 bowersj2 1405: my $condition = 0;
1406: if ($ENV{'form.condition'}) {
1407: $condition = 1;
1408: }
1409:
1410: if (!$ENV{'form.folderManip'} && !defined($args->{'iterator'})) {
1411: # Step 1: Check to see if we have a navmap
1412: if (!defined($navmap)) {
1.221 bowersj2 1413: $navmap = Apache::lonnavmaps::navmap->new();
1.140 bowersj2 1414: $mustCloseNavMap = 1;
1415: }
1416:
1417: # Step two: Locate what kind of here marker is necessary
1418: # Determine where the "here" marker is and where the screen jumps to.
1419:
1.175 bowersj2 1420: if ($ENV{'form.postsymb'}) {
1421: $here = $jump = $ENV{'form.postsymb'};
1.140 bowersj2 1422: } elsif ($ENV{'form.postdata'}) {
1423: # couldn't find a symb, is there a URL?
1424: my $currenturl = $ENV{'form.postdata'};
1.158 bowersj2 1425: #$currenturl=~s/^http\:\/\///;
1426: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1427:
1.158 bowersj2 1428: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.276 albertel 1429: }
1.158 bowersj2 1430:
1.140 bowersj2 1431: # Step three: Ensure the folders are open
1432: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1433: my $curRes;
1.140 bowersj2 1434: my $found = 0;
1435:
1436: # We only need to do this if we need to open the maps to show the
1437: # current position. This will change the counter so we can't count
1438: # for the jump marker with this loop.
1.294 albertel 1439: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1440: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1441: my $mapStack = $mapIterator->getStack();
1442:
1443: # Ensure the parent maps are open
1444: for my $map (@{$mapStack}) {
1445: if ($condition) {
1446: undef $filterHash->{$map->map_pc()};
1447: } else {
1448: $filterHash->{$map->map_pc()} = 1;
1449: }
1450: }
1451: $found = 1;
1452: }
1453: }
1.159 bowersj2 1454: }
1.140 bowersj2 1455:
1456: if ( !defined($args->{'iterator'}) && $ENV{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1457: # If this is a click on a folder or something, we want to preserve the "here"
1458: # from the querystring, and get the new "jump" marker
1459: $here = $ENV{'form.here'};
1460: $jump = $ENV{'form.jump'};
1461: }
1462:
1.132 bowersj2 1463: my $it = $args->{'iterator'};
1464: if (!defined($it)) {
1.140 bowersj2 1465: # Construct a default iterator based on $ENV{'form.'} information
1466:
1467: # Step 1: Check to see if we have a navmap
1468: if (!defined($navmap)) {
1.221 bowersj2 1469: $navmap = Apache::lonnavmaps::navmap->new();
1.140 bowersj2 1470: $mustCloseNavMap = 1;
1471: }
1472:
1.144 bowersj2 1473: # See if we're being passed a specific map
1474: if ($args->{'iterator_map'}) {
1475: my $map = $args->{'iterator_map'};
1.145 bowersj2 1476: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1477: my $firstResource = $map->map_start();
1478: my $finishResource = $map->map_finish();
1479:
1480: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1481: } else {
1482: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);
1483: }
1.132 bowersj2 1484: }
1.256 albertel 1485:
1.159 bowersj2 1486: # (re-)Locate the jump point, if any
1.191 bowersj2 1487: # Note this does not take filtering or hidden into account... need
1488: # to be fixed?
1.159 bowersj2 1489: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1490: my $curRes;
1.159 bowersj2 1491: my $foundJump = 0;
1492: my $counter = 0;
1493:
1.222 bowersj2 1494: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1495: if (ref($curRes)) { $counter++; }
1496:
1497: if (ref($curRes) && $jump eq $curRes->symb()) {
1498:
1499: # This is why we have to use the main iterator instead of the
1500: # potentially faster DFS: The count has to be the same, so
1501: # the order has to be the same, which DFS won't give us.
1502: $args->{'currentJumpIndex'} = $counter;
1503: $foundJump = 1;
1504: }
1505: }
1506:
1.132 bowersj2 1507: my $showParts = setDefault($args->{'showParts'}, 1);
1508: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1509: # keeps track of when the current resource is found,
1510: # so we can back up a few and put the anchor above the
1511: # current resource
1.140 bowersj2 1512: my $printKey = $args->{'printKey'};
1513: my $printCloseAll = $args->{'printCloseAll'};
1514: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.144 bowersj2 1515:
1.140 bowersj2 1516: # Print key?
1517: if ($printKey) {
1518: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1519: my $date=localtime;
1520: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1521: if ($navmap->{LAST_CHECK}) {
1522: $result .=
1.230 www 1523: '<img src="/adm/lonMisc/chat.gif"> '.&mt('New discussion since').' '.
1.140 bowersj2 1524: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1525: '</td><td align="center" valign="bottom"> '.
1.230 www 1526: '<img src="/adm/lonMisc/feedback.gif"> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1527: '</td>';
1528: } else {
1529: $result .= '<td align="center" valign="bottom"> '.
1.230 www 1530: '<img src="/adm/lonMisc/chat.gif"> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1531: ' <img src="/adm/lonMisc/feedback.gif"> '.&mt('New message (click to open)').
1.140 bowersj2 1532: '</td>';
1533: }
1534:
1535: $result .= '</tr></table>';
1536: }
1537:
1.172 bowersj2 1538: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1539: my ($link,$text);
1.140 bowersj2 1540: if ($condition) {
1.281 albertel 1541: $link='"navmaps?condition=0&filter=&'.$queryString.
1542: '&here='.&Apache::lonnet::escape($here).'"';
1543: $text='Close All Folders';
1.140 bowersj2 1544: } else {
1.281 albertel 1545: $link='"navmaps?condition=1&filter=&'.$queryString.
1546: '&here='.&Apache::lonnet::escape($here).'"';
1547: $text='Open All Folders';
1548: }
1549: if ($args->{'caller'} eq 'navmapsdisplay') {
1550: &add_linkitem($args->{'linkitems'},'changefolder',
1551: 'location.href='.$link,$text);
1552: } else {
1553: $result.='<a href='.$link.'>'.&mt($text).'</a>';
1554: }
1.266 raeburn 1555: $result .= "\n";
1556: }
1.140 bowersj2 1557:
1.266 raeburn 1558: # Check for any unread discussions in all resources.
1.281 albertel 1559: if ($args->{'caller'} eq 'navmapsdisplay') {
1.296 albertel 1560: &add_linkitem($args->{'linkitems'},'clearbubbles',
1561: 'document.clearbubbles.submit()',
1562: 'Mark all posts read');
1.297 ! albertel 1563: my $time=time;
1.296 albertel 1564: $result .= (<<END);
1565: <form name="clearbubbles" method="post" action="/adm/feedback">
1566: <input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
1.297 ! albertel 1567: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1568: END
1569: if ($args->{'sort'} eq 'discussion') {
1570: my $totdisc = 0;
1571: my $haveDisc = '';
1572: my @allres=$navmap->retrieveResources();
1573: foreach my $resource (@allres) {
1574: if ($resource->hasDiscussion()) {
1575: my $ressymb;
1576: if ($resource->symb() =~ m-(___adm/\w+/\w+)/(\d+)/bulletinboard$-) {
1577: $ressymb = 'bulletin___'.$2.$1.'/'.$2.'/bulletinboard';
1578: } else {
1579: $ressymb = $resource->symb();
1580: }
1581: $haveDisc .= $ressymb.':';
1582: $totdisc ++;
1.267 albertel 1583: }
1584: }
1.296 albertel 1585: if ($totdisc > 0) {
1586: $haveDisc =~ s/:$//;
1587: my $navurl = $ENV{'QUERY_STRING'};
1588: $result .= (<<END);
1589: <input type="hidden" name="navmaps" value="$haveDisc" />
1590: </form>
1591: END
1592: }
1.297 ! albertel 1593: }
! 1594: $result.='</form>';
1.266 raeburn 1595: }
1.276 albertel 1596:
1.281 albertel 1597: if ($args->{'caller'} eq 'navmapsdisplay') {
1.283 raeburn 1598: $result .= '<table><tr><td>'.
1599: &Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT').'</td>';
1600: if ($ENV{'environment.remotenavmap'} ne 'on') {
1601: $result .= '<td> </td>';
1602: } else {
1603: $result .= '</tr><tr>';
1604: }
1.281 albertel 1605: $result.=&show_linkitems($args->{'linkitems'});
1606: if ($args->{'sort_html'}) {
1607: if ($ENV{'environment.remotenavmap'} ne 'on') {
1608: $result.='<td> </td><td> </td><td> </td>'.
1609: '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
1610: } else {
1611: $result.='</tr><tr><td align="left"><br />'.
1612: $args->{'sort_html'}.'</td></tr>';
1613: }
1614: }
1615: $result .= '</table>';
1616: } elsif ($args->{'sort_html'}) {
1617: $result.=$args->{'sort_html'};
1618: }
1.276 albertel 1619:
1.266 raeburn 1620: $result .= "<br />\n";
1.140 bowersj2 1621: if ($r) {
1622: $r->print($result);
1623: $r->rflush();
1624: $result = "";
1625: }
1.132 bowersj2 1626: # End parameter setting
1.133 bowersj2 1627:
1.132 bowersj2 1628: # Data
1.140 bowersj2 1629: $result .= '<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n";
1.132 bowersj2 1630: my $res = "Apache::lonnavmaps::resource";
1631: my %condenseStatuses =
1632: ( $res->NETWORK_FAILURE => 1,
1633: $res->NOTHING_SET => 1,
1634: $res->CORRECT => 1 );
1635: my @backgroundColors = ("#FFFFFF", "#F6F6F6");
1.133 bowersj2 1636:
1637: # Shared variables
1638: $args->{'counter'} = 0; # counts the rows
1639: $args->{'indentLevel'} = 0;
1640: $args->{'isNewBranch'} = 0;
1641: $args->{'condensed'} = 0;
1642: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='/adm/lonIcons/whitespace1.gif' width='25' height='1' alt='' border='0' />");
1643: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1644:
1.190 bowersj2 1645: # If we're suppressing empty sequences, look for them here. Use DFS for speed,
1646: # since structure actually doesn't matter, except what map has what resources.
1647: if ($args->{'suppressEmptySequences'}) {
1648: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1649: $it->{FIRST_RESOURCE},
1650: $it->{FINISH_RESOURCE},
1651: {}, undef, 1);
1.222 bowersj2 1652: my $depth = 0;
1.190 bowersj2 1653: $dfsit->next();
1654: my $curRes = $dfsit->next();
1655: while ($depth > -1) {
1656: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1657: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1658:
1659: if (ref($curRes)) {
1660: # Parallel pre-processing: Do sequences have non-filtered-out children?
1.201 bowersj2 1661: if ($curRes->is_map()) {
1.190 bowersj2 1662: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1663: # Sequences themselves do not count as visible children,
1664: # unless those sequences also have visible children.
1665: # This means if a sequence appears, there's a "promise"
1666: # that there's something under it if you open it, somewhere.
1667: } else {
1668: # Not a sequence: if it's filtered, ignore it, otherwise
1669: # rise up the stack and mark the sequences as having children
1670: if (&$filterFunc($curRes)) {
1671: for my $sequence (@{$dfsit->getStack()}) {
1672: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1673: }
1674: }
1675: }
1676: }
1677: } continue {
1678: $curRes = $dfsit->next();
1679: }
1680: }
1681:
1.133 bowersj2 1682: my $displayedJumpMarker = 0;
1.132 bowersj2 1683: # Set up iteration.
1684: my $now = time();
1685: my $in24Hours = $now + 24 * 60 * 60;
1686: my $rownum = 0;
1687:
1.141 bowersj2 1688: # export "here" marker information
1689: $args->{'here'} = $here;
1690:
1.222 bowersj2 1691: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1692: my @resources;
1693: my $code='';# sub { !(shift->is_map();) };
1694: if ($args->{'sort'} eq 'title') {
1.276 albertel 1695: my $oldFilterFunc = $filterFunc;
1696: my $filterFunc=
1697: sub {
1698: my ($res)=@_;
1699: if ($res->is_map()) { return 0;}
1700: return &$oldFilterFunc($res);
1701: };
1702: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1703: @resources= sort { &cmp_title($a,$b) } @resources;
1704: } elsif ($args->{'sort'} eq 'duedate') {
1705: my $oldFilterFunc = $filterFunc;
1706: my $filterFunc=
1707: sub {
1708: my ($res)=@_;
1709: if (!$res->is_problem()) { return 0;}
1710: return &$oldFilterFunc($res);
1711: };
1712: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1713: @resources= sort {
1.270 albertel 1714: if ($a->duedate ne $b->duedate) {
1715: return $a->duedate cmp $b->duedate;
1716: }
1.296 albertel 1717: my $value=&cmp_title($a,$b);
1718: return $value;
1.270 albertel 1719: } @resources;
1.296 albertel 1720: } elsif ($args->{'sort'} eq 'discussion') {
1721: my $oldFilterFunc = $filterFunc;
1722: my $filterFunc=
1723: sub {
1724: my ($res)=@_;
1725: if (!$res->hasDiscussion() &&
1726: !$res->getFeedback() &&
1727: !$res->getErrors()) { return 0;}
1728: return &$oldFilterFunc($res);
1729: };
1730: @resources=$navmap->retrieveResources(undef,$filterFunc);
1731: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1732: } else {
1733: #unknow sort mechanism or default
1734: undef($args->{'sort'});
1.270 albertel 1735: }
1736:
1.276 albertel 1737:
1.270 albertel 1738: while (1) {
1739: if ($args->{'sort'}) {
1740: $curRes = shift(@resources);
1741: } else {
1742: $curRes = $it->next($closeAllPages);
1743: }
1744: if (!$curRes) { last; }
1745:
1.132 bowersj2 1746: # Maintain indentation level.
1747: if ($curRes == $it->BEGIN_MAP() ||
1748: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1749: $args->{'indentLevel'}++;
1.132 bowersj2 1750: }
1751: if ($curRes == $it->END_MAP() ||
1752: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1753: $args->{'indentLevel'}--;
1.132 bowersj2 1754: }
1755: # Notice new branches
1756: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1757: $args->{'isNewBranch'} = 1;
1758: }
1759:
1760: # If this isn't an actual resource, continue on
1761: if (!ref($curRes)) {
1762: next;
1.132 bowersj2 1763: }
1.133 bowersj2 1764:
1.143 bowersj2 1765: # If this has been filtered out, continue on
1766: if (!(&$filterFunc($curRes))) {
1767: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1768: next;
1769: }
1.132 bowersj2 1770:
1.190 bowersj2 1771: # If this is an empty sequence and we're filtering them, continue on
1.201 bowersj2 1772: if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&
1.190 bowersj2 1773: !$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {
1774: next;
1775: }
1776:
1.153 bowersj2 1777: # If we're suppressing navmaps and this is a navmap, continue on
1778: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1779: next;
1780: }
1781:
1.191 bowersj2 1782: $args->{'counter'}++;
1783:
1.132 bowersj2 1784: # Does it have multiple parts?
1.133 bowersj2 1785: $args->{'multipart'} = 0;
1786: $args->{'condensed'} = 0;
1.132 bowersj2 1787: my @parts;
1788:
1789: # Decide what parts to show.
1.133 bowersj2 1790: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1791: @parts = @{$curRes->parts()};
1.192 bowersj2 1792: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1793:
1794: if ($condenseParts) { # do the condensation
1795: if (!$curRes->opendate("0")) {
1.162 bowersj2 1796: @parts = ();
1.133 bowersj2 1797: $args->{'condensed'} = 1;
1.132 bowersj2 1798: }
1.133 bowersj2 1799: if (!$args->{'condensed'}) {
1.132 bowersj2 1800: # Decide whether to condense based on similarity
1.192 bowersj2 1801: my $status = $curRes->status($parts[0]);
1802: my $due = $curRes->duedate($parts[0]);
1803: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1804: my $statusAllSame = 1;
1805: my $dueAllSame = 1;
1806: my $openAllSame = 1;
1.192 bowersj2 1807: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1808: if ($curRes->status($parts[$i]) != $status){
1809: $statusAllSame = 0;
1810: }
1811: if ($curRes->duedate($parts[$i]) != $due ) {
1812: $dueAllSame = 0;
1813: }
1814: if ($curRes->opendate($parts[$i]) != $open) {
1815: $openAllSame = 0;
1816: }
1817: }
1818: # $*allSame is true if all the statuses were
1819: # the same. Now, if they are all the same and
1820: # match one of the statuses to condense, or they
1821: # are all open with the same due date, or they are
1822: # all OPEN_LATER with the same open date, display the
1823: # status of the first non-zero part (to get the 'correct'
1824: # status right, since 0 is never 'correct' or 'open').
1825: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1826: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1827: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1828: @parts = ($parts[0]);
1.133 bowersj2 1829: $args->{'condensed'} = 1;
1.132 bowersj2 1830: }
1831: }
1.198 bowersj2 1832: # Multipart problem with one part: always "condense" (happens
1833: # to match the desirable behavior)
1834: if ($curRes->countParts() == 1) {
1835: @parts = ($parts[0]);
1836: $args->{'condensed'} = 1;
1837: }
1.132 bowersj2 1838: }
1.157 bowersj2 1839: }
1.132 bowersj2 1840:
1841: # If the multipart problem was condensed, "forget" it was multipart
1842: if (scalar(@parts) == 1) {
1.133 bowersj2 1843: $args->{'multipart'} = 0;
1.192 bowersj2 1844: } else {
1845: # Add part 0 so we display it correctly.
1846: unshift @parts, '0';
1.132 bowersj2 1847: }
1848:
1849: # Now, we've decided what parts to show. Loop through them and
1850: # show them.
1.192 bowersj2 1851: foreach my $part (@parts) {
1.132 bowersj2 1852: $rownum ++;
1853: my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];
1854:
1855: $result .= " <tr bgcolor='$backgroundColor'>\n";
1.134 bowersj2 1856:
1857: # Set up some data about the parts that the cols might want
1858: my $filter = $it->{FILTER};
1.270 albertel 1859: my $src;
1860: if ($args->{'sort'}) {
1861: $src = $curRes->src(); # FIXME this is wrong for .pages
1862: } else {
1863: my $stack = $it->getStack();
1864: $src=getLinkForResource($stack);
1865: }
1.249 www 1866: my $anchor='';
1.270 albertel 1867: if ($src=~s/(\#.*)$//) {
1.249 www 1868: $anchor=$1;
1869: }
1.134 bowersj2 1870: my $srcHasQuestion = $src =~ /\?/;
1871: $args->{"resourceLink"} = $src.
1872: ($srcHasQuestion?'&':'?') .
1.249 www 1873: 'symb=' . &Apache::lonnet::escape($curRes->symb()).
1874: $anchor;
1.270 albertel 1875:
1.132 bowersj2 1876: # Now, display each column.
1877: foreach my $col (@$cols) {
1.139 bowersj2 1878: my $colHTML = '';
1879: if (ref($col)) {
1880: $colHTML .= &$col($curRes, $part, $args);
1881: } else {
1882: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1883: }
1.132 bowersj2 1884:
1.133 bowersj2 1885: # If this is the first column and it's time to print
1886: # the anchor, do so
1887: if ($col == $cols->[0] &&
1888: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1889: $currentJumpDelta) {
1890: # Jam the anchor after the <td> tag;
1891: # necessary for valid HTML (which Mozilla requires)
1892: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1893: $displayedJumpMarker = 1;
1894: }
1.139 bowersj2 1895: $result .= $colHTML . "\n";
1.132 bowersj2 1896: }
1.139 bowersj2 1897: $result .= " </tr>\n";
1.140 bowersj2 1898: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1899: }
1.153 bowersj2 1900:
1.139 bowersj2 1901: if ($r && $rownum % 20 == 0) {
1902: $r->print($result);
1903: $result = "";
1904: $r->rflush();
1.132 bowersj2 1905: }
1.156 bowersj2 1906: } continue {
1.208 bowersj2 1907: if ($r) {
1908: # If we have the connection, make sure the user is still connected
1909: my $c = $r->connection;
1910: if ($c->aborted()) {
1911: # Who cares what we do, nobody will see it anyhow.
1912: return '';
1913: }
1914: }
1.132 bowersj2 1915: }
1916:
1.134 bowersj2 1917: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1918: # delay needed because the browser is processing the jump before
1919: # it finishes rendering, so it goes to the wrong place!
1920: # onload might be better, but this routine has no access to that.
1921: # On mozilla, the 0-millisecond timeout seems to prevent this;
1922: # it's quite likely this might fix other browsers, too, and
1923: # certainly won't hurt anything.
1.139 bowersj2 1924: if ($displayedJumpMarker) {
1.247 albertel 1925: $result .= "
1926: <script>
1927: if (location.href.indexOf('#curloc')==-1) {
1928: setTimeout(\"location += '#curloc';\", 0)
1929: }
1930: </script>";
1.134 bowersj2 1931: }
1932:
1.132 bowersj2 1933: $result .= "</table>";
1.140 bowersj2 1934:
1935: if ($r) {
1936: $r->print($result);
1937: $result = "";
1938: $r->rflush();
1939: }
1940:
1.175 bowersj2 1941: if ($mustCloseNavMap) { $navmap->untieHashes(); }
1.132 bowersj2 1942:
1943: return $result;
1944: }
1945:
1.281 albertel 1946: sub add_linkitem {
1947: my ($linkitems,$name,$cmd,$text)=@_;
1948: $$linkitems{$name}{'cmd'}=$cmd;
1949: $$linkitems{$name}{'text'}=&mt($text);
1950: }
1951:
1952: sub show_linkitems {
1953: my ($linkitems)=@_;
1954: my @linkorder = ("launchnav","closenav","firsthomework","everything",
1955: "uncompleted","changefolder","clearbubbles");
1956:
1957: my $result .= (<<ENDBLOCK);
1.283 raeburn 1958: <td align="left">
1.281 albertel 1959: <script type="text/javascript">
1960: function changeNavDisplay () {
1961: var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
1962: ENDBLOCK
1963: foreach my $link (@linkorder) {
1964: $result.= "if (navchoice == '$link') {".
1965: $linkitems->{$link}{'cmd'}."}\n";
1966: }
1967: $result.='}
1968: </script>
1969: <form name="linkitems" method="post">
1970: <nobr><select name="toplink">'."\n";
1971: foreach my $link (@linkorder) {
1972: if (defined($linkitems->{$link})) {
1973: if ($linkitems->{$link}{'text'} ne '') {
1974: $result .= ' <option value="'.$link.'">'.
1975: $linkitems->{$link}{'text'}."</option>\n";
1976: }
1977: }
1978: }
1979: $result .= '</select> <input type="button" name="chgnav"
1980: value="Go" onClick="javascript:changeNavDisplay()" />
1981: </nobr></form></td>'."\n";
1982: return $result;
1983: }
1984:
1.133 bowersj2 1985: 1;
1986:
1987: package Apache::lonnavmaps::navmap;
1988:
1989: =pod
1990:
1.216 bowersj2 1991: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 1992:
1.217 bowersj2 1993: =head2 Overview
1.133 bowersj2 1994:
1.217 bowersj2 1995: The navmap object's job is to provide access to the resources
1996: in the course as Apache::lonnavmaps::resource objects, and to
1997: query and manage the relationship between those resource objects.
1998:
1999: Generally, you'll use the navmap object in one of three basic ways.
2000: In order of increasing complexity and power:
2001:
2002: =over 4
2003:
2004: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb>, B<Url> or B<MapPc>. This provides
2005: various ways to obtain resource objects, based on various identifiers.
2006: Use this when you want to request information about one object or
2007: a handful of resources you already know the identities of, from some
2008: other source. For more about Ids, Symbs, and MapPcs, see the
2009: Resource documentation. Note that Url should be a B<last resort>,
2010: not your first choice; it only works when there is only one
2011: instance of the resource in the course, which only applies to
2012: maps, and even that may change in the future.
2013:
2014: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
2015: retrieves resources matching some criterion and returns them
2016: in a flat array, with no structure information. Use this when
2017: you are manipulating a series of resources, based on what map
2018: the are in, but do not care about branching, or exactly how
2019: the maps and resources are related. This is the most common case.
2020:
2021: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
2022: the course's navmap in various ways without writing the traversal
2023: code yourself. See iterator documentation below. Use this when
2024: you need to know absolutely everything about the course, including
2025: branches and the precise relationship between maps and resources.
2026:
2027: =back
2028:
2029: =head2 Creation And Destruction
2030:
2031: To create a navmap object, use the following function:
1.133 bowersj2 2032:
2033: =over 4
2034:
1.221 bowersj2 2035: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 2036:
1.221 bowersj2 2037: Creates a new navmap object. Returns the navmap object if this is
2038: successful, or B<undef> if not.
1.174 albertel 2039:
1.216 bowersj2 2040: =back
2041:
1.217 bowersj2 2042: When you are done with the $navmap object, you I<must> call
2043: $navmap->untieHashes(), or you'll prevent the current user from using that
2044: course until the web server is restarted. (!)
2045:
1.216 bowersj2 2046: =head2 Methods
2047:
2048: =over 4
2049:
1.174 albertel 2050: =item * B<getIterator>(first, finish, filter, condition):
2051:
2052: See iterator documentation below.
1.133 bowersj2 2053:
2054: =cut
2055:
2056: use strict;
2057: use GDBM_File;
2058:
2059: sub new {
2060: # magic invocation to create a class instance
2061: my $proto = shift;
2062: my $class = ref($proto) || $proto;
2063: my $self = {};
2064:
2065: # Resource cache stores navmap resources as we reference them. We generate
2066: # them on-demand so we don't pay for creating resources unless we use them.
2067: $self->{RESOURCE_CACHE} = {};
2068:
2069: # Network failure flag, if we accessed the course or user opt and
2070: # failed
2071: $self->{NETWORK_FAILURE} = 0;
2072:
2073: # tie the nav hash
2074:
1.168 bowersj2 2075: my %navmaphash;
2076: my %parmhash;
1.220 bowersj2 2077: my $courseFn = $ENV{"request.course.fn"};
2078: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
1.133 bowersj2 2079: &GDBM_READER(), 0640))) {
2080: return undef;
2081: }
2082:
1.220 bowersj2 2083: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
1.133 bowersj2 2084: &GDBM_READER(), 0640)))
2085: {
1.170 matthew 2086: untie %{$self->{PARM_HASH}};
1.133 bowersj2 2087: return undef;
2088: }
2089:
1.199 bowersj2 2090: $self->{NAV_HASH} = \%navmaphash;
1.168 bowersj2 2091: $self->{PARM_HASH} = \%parmhash;
1.221 bowersj2 2092: $self->{PARM_CACHE} = {};
1.133 bowersj2 2093:
2094: bless($self);
2095:
2096: return $self;
2097: }
2098:
1.221 bowersj2 2099: sub generate_course_user_opt {
1.133 bowersj2 2100: my $self = shift;
1.221 bowersj2 2101: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 2102:
1.221 bowersj2 2103: my $uname=$ENV{'user.name'};
2104: my $udom=$ENV{'user.domain'};
2105: my $uhome=$ENV{'user.home'};
2106: my $cid=$ENV{'request.course.id'};
2107: my $chome=$ENV{'course.'.$cid.'.home'};
2108: my ($cdom,$cnum)=split(/\_/,$cid);
2109:
2110: my $userprefix=$uname.'_'.$udom.'_';
2111:
2112: my %courserdatas; my %useropt; my %courseopt; my %userrdatas;
2113: unless ($uhome eq 'no_host') {
1.133 bowersj2 2114: # ------------------------------------------------- Get coursedata (if present)
1.221 bowersj2 2115: unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
2116: my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
2117: ':resourcedata',$chome);
2118: # Check for network failure
2119: if ( $reply =~ /no.such.host/i || $reply =~ /con_lost/i) {
2120: $self->{NETWORK_FAILURE} = 1;
2121: } elsif ($reply!~/^error\:/) {
2122: $courserdatas{$cid}=$reply;
2123: $courserdatas{$cid.'.last_cache'}=time;
2124: }
2125: }
2126: foreach (split(/\&/,$courserdatas{$cid})) {
2127: my ($name,$value)=split(/\=/,$_);
2128: $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
2129: &Apache::lonnet::unescape($value);
2130: }
1.133 bowersj2 2131: # --------------------------------------------------- Get userdata (if present)
1.221 bowersj2 2132: unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
2133: my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
2134: if ($reply!~/^error\:/) {
2135: $userrdatas{$uname.'___'.$udom}=$reply;
2136: $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
2137: }
2138: # check to see if network failed
2139: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
2140: {
2141: $self->{NETWORK_FAILURE} = 1;
2142: }
2143: }
2144: foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
2145: my ($name,$value)=split(/\=/,$_);
2146: $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
2147: &Apache::lonnet::unescape($value);
2148: }
2149: $self->{COURSE_OPT} = \%courseopt;
2150: $self->{USER_OPT} = \%useropt;
2151: }
2152:
2153: $self->{COURSE_USER_OPT_GENERATED} = 1;
2154:
2155: return;
2156: }
2157:
2158: sub generate_email_discuss_status {
2159: my $self = shift;
1.259 raeburn 2160: my $symb = shift;
1.221 bowersj2 2161: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 2162:
1.221 bowersj2 2163: my $cid=$ENV{'request.course.id'};
2164: my ($cdom,$cnum)=split(/\_/,$cid);
2165:
2166: my %emailstatus = &Apache::lonnet::dump('email_status');
2167: my $logoutTime = $emailstatus{'logout'};
2168: my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
2169: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2170: $courseLeaveTime : $logoutTime);
2171: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2172: $cdom, $cnum);
1.259 raeburn 2173: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
2174: $ENV{'user.domain'},$ENV{'user.name'},'lastread');
2175: my %lastreadtime = ();
2176: foreach (keys %lastread) {
2177: my $key = $_;
2178: $key =~ s/_lastread$//;
2179: $lastreadtime{$key} = $lastread{$_};
2180: }
2181:
1.221 bowersj2 2182: my %feedback=();
2183: my %error=();
2184: my $keys = &Apache::lonnet::reply('keys:'.
2185: $ENV{'user.domain'}.':'.
2186: $ENV{'user.name'}.':nohist_email',
2187: $ENV{'user.home'});
2188:
2189: foreach my $msgid (split(/\&/, $keys)) {
2190: $msgid=&Apache::lonnet::unescape($msgid);
1.295 albertel 2191: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
2192: my $plain=
2193: &Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
2194: if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
2195: my ($what,$url)=($1,$2);
1.221 bowersj2 2196: if ($what eq 'Error') {
2197: $error{$url}.=','.$msgid;
2198: } else {
2199: $feedback{$url}.=','.$msgid;
2200: }
2201: }
2202: }
1.211 bowersj2 2203: }
1.221 bowersj2 2204:
1.295 albertel 2205: #url's of resources that have feedbacks
1.221 bowersj2 2206: $self->{FEEDBACK} = \%feedback;
1.295 albertel 2207: #or errors
2208: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 2209: $self->{DISCUSSION_TIME} = \%discussiontime;
2210: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 2211: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 2212:
2213: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2214: }
2215:
2216: sub get_user_data {
2217: my $self = shift;
2218: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 2219:
1.221 bowersj2 2220: # Retrieve performance data on problems
2221: my %student_data = Apache::lonnet::currentdump($ENV{'request.course.id'},
2222: $ENV{'user.domain'},
2223: $ENV{'user.name'});
2224: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 2225:
1.221 bowersj2 2226: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 2227: }
2228:
2229: # Internal function: Takes a key to look up in the nav hash and implements internal
2230: # memory caching of that key.
2231: sub navhash {
2232: my $self = shift; my $key = shift;
2233: return $self->{NAV_HASH}->{$key};
2234: }
2235:
1.217 bowersj2 2236: =pod
2237:
2238: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2239: false otherwise. Undefined course maps indicate an error somewhere in
2240: LON-CAPA, and you will not be able to proceed with using the navmap.
2241: See the B<NAV> screen for an example of using this.
2242:
2243: =cut
2244:
1.133 bowersj2 2245: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2246: sub courseMapDefined {
2247: my $self = shift;
2248: my $uri = &Apache::lonnet::clutter($ENV{'request.course.uri'});
2249:
2250: my $firstres = $self->navhash("map_start_$uri");
2251: my $lastres = $self->navhash("map_finish_$uri");
2252: return $firstres && $lastres;
2253: }
2254:
2255: sub getIterator {
2256: my $self = shift;
2257: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
2258: shift, undef, shift);
2259: return $iterator;
2260: }
2261:
2262: # unties the hash when done
2263: sub untieHashes {
1.168 bowersj2 2264: my $self = shift;
1.170 matthew 2265: untie %{$self->{NAV_HASH}};
2266: untie %{$self->{PARM_HASH}};
1.133 bowersj2 2267: }
2268:
2269: # Private method: Does the given resource (as a symb string) have
2270: # current discussion? Returns 0 if chat/mail data not extracted.
2271: sub hasDiscussion {
2272: my $self = shift;
2273: my $symb = shift;
1.221 bowersj2 2274:
2275: $self->generate_email_discuss_status();
2276:
1.133 bowersj2 2277: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2278:
2279: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2280:
2281: # backward compatibility (bulletin boards used to be 'wrapped')
2282: my $ressymb = $symb;
2283: if ($ressymb =~ m|adm/(\w+)/(\w+)/(\d+)/bulletinboard$|) {
1.266 raeburn 2284: unless ($ressymb =~ m|adm/wrapper/adm|) {
1.259 raeburn 2285: $ressymb = 'bulletin___'.$3.'___adm/wrapper/adm/'.$1.'/'.$2.'/'.$3.'/bulletinboard';
2286: }
2287: }
2288:
2289: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2290: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2291: } else {
1.266 raeburn 2292: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2293: 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 2294: }
1.133 bowersj2 2295: }
2296:
2297: # Private method: Does the given resource (as a symb string) have
2298: # current feedback? Returns the string in the feedback hash, which
2299: # will be false if it does not exist.
2300: sub getFeedback {
2301: my $self = shift;
2302: my $symb = shift;
2303:
1.221 bowersj2 2304: $self->generate_email_discuss_status();
2305:
1.133 bowersj2 2306: if (!defined($self->{FEEDBACK})) { return ""; }
2307:
2308: return $self->{FEEDBACK}->{$symb};
2309: }
2310:
2311: # Private method: Get the errors for that resource (by source).
2312: sub getErrors {
2313: my $self = shift;
2314: my $src = shift;
1.221 bowersj2 2315:
2316: $self->generate_email_discuss_status();
2317:
1.133 bowersj2 2318: if (!defined($self->{ERROR_MSG})) { return ""; }
2319: return $self->{ERROR_MSG}->{$src};
2320: }
2321:
2322: =pod
2323:
1.174 albertel 2324: =item * B<getById>(id):
2325:
2326: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2327: object for that resource. This method, or other methods that use it
2328: (as in the resource object) is the only proper way to obtain a
2329: resource object.
1.133 bowersj2 2330:
1.194 bowersj2 2331: =item * B<getBySymb>(symb):
2332:
2333: Based on the symb of the resource, get a resource object for that
2334: resource. This is one of the proper ways to get a resource object.
2335:
2336: =item * B<getMapByMapPc>(map_pc):
2337:
2338: Based on the map_pc of the resource, get a resource object for
2339: the given map. This is one of the proper ways to get a resource object.
2340:
1.133 bowersj2 2341: =cut
2342:
2343: # The strategy here is to cache the resource objects, and only construct them
2344: # as we use them. The real point is to prevent reading any more from the tied
2345: # hash then we have to, which should hopefully alleviate speed problems.
2346:
2347: sub getById {
2348: my $self = shift;
2349: my $id = shift;
2350:
2351: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2352: {
2353: return $self->{RESOURCE_CACHE}->{$id};
2354: }
2355:
2356: # resource handles inserting itself into cache.
2357: # Not clear why the quotes are necessary, but as of this
2358: # writing it doesn't work without them.
2359: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2360: }
1.133 bowersj2 2361:
1.172 bowersj2 2362: sub getBySymb {
2363: my $self = shift;
2364: my $symb = shift;
1.277 matthew 2365:
1.228 albertel 2366: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2367: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2368: my $returnvalue = undef;
2369: if (ref($map)) {
2370: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2371: }
2372: return $returnvalue;
1.194 bowersj2 2373: }
2374:
2375: sub getByMapPc {
2376: my $self = shift;
2377: my $map_pc = shift;
2378: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2379: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2380: return $self->getById($map_id);
1.172 bowersj2 2381: }
2382:
1.133 bowersj2 2383: =pod
2384:
1.174 albertel 2385: =item * B<firstResource>():
2386:
2387: Returns a resource object reference corresponding to the first
2388: resource in the navmap.
1.133 bowersj2 2389:
2390: =cut
2391:
2392: sub firstResource {
2393: my $self = shift;
2394: my $firstResource = $self->navhash('map_start_' .
2395: &Apache::lonnet::clutter($ENV{'request.course.uri'}));
2396: return $self->getById($firstResource);
1.132 bowersj2 2397: }
1.133 bowersj2 2398:
2399: =pod
2400:
1.174 albertel 2401: =item * B<finishResource>():
2402:
2403: Returns a resource object reference corresponding to the last resource
2404: in the navmap.
1.133 bowersj2 2405:
2406: =cut
2407:
2408: sub finishResource {
2409: my $self = shift;
2410: my $firstResource = $self->navhash('map_finish_' .
2411: &Apache::lonnet::clutter($ENV{'request.course.uri'}));
2412: return $self->getById($firstResource);
1.132 bowersj2 2413: }
1.133 bowersj2 2414:
2415: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2416: # the actual lookup; parmval caches the results.
2417: sub parmval {
2418: my $self = shift;
2419: my ($what,$symb)=@_;
2420: my $hashkey = $what."|||".$symb;
2421:
2422: if (defined($self->{PARM_CACHE}->{$hashkey})) {
2423: return $self->{PARM_CACHE}->{$hashkey};
2424: }
2425:
2426: my $result = $self->parmval_real($what, $symb);
2427: $self->{PARM_CACHE}->{$hashkey} = $result;
2428: return $result;
1.132 bowersj2 2429: }
2430:
1.133 bowersj2 2431: sub parmval_real {
2432: my $self = shift;
1.219 albertel 2433: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2434:
1.221 bowersj2 2435: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2436: $self->generate_course_user_opt();
2437:
1.133 bowersj2 2438: my $cid=$ENV{'request.course.id'};
2439: my $csec=$ENV{'request.course.sec'};
2440: my $uname=$ENV{'user.name'};
2441: my $udom=$ENV{'user.domain'};
2442:
2443: unless ($symb) { return ''; }
2444: my $result='';
2445:
1.226 www 2446: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.133 bowersj2 2447:
2448: # ----------------------------------------------------- Cascading lookup scheme
2449: my $rwhat=$what;
2450: $what=~s/^parameter\_//;
2451: $what=~s/\_/\./;
2452:
2453: my $symbparm=$symb.'.'.$what;
2454: my $mapparm=$mapname.'___(all).'.$what;
2455: my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;
2456:
2457: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2458: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2459: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2460:
2461: my $courselevel= $usercourseprefix.'.'.$what;
2462: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2463: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2464:
2465: my $useropt = $self->{USER_OPT};
2466: my $courseopt = $self->{COURSE_OPT};
2467: my $parmhash = $self->{PARM_HASH};
2468:
2469: # ---------------------------------------------------------- first, check user
2470: if ($uname and defined($useropt)) {
2471: if (defined($$useropt{$courselevelr})) { return $$useropt{$courselevelr}; }
2472: if (defined($$useropt{$courselevelm})) { return $$useropt{$courselevelm}; }
2473: if (defined($$useropt{$courselevel})) { return $$useropt{$courselevel}; }
2474: }
2475:
2476: # ------------------------------------------------------- second, check course
2477: if ($csec and defined($courseopt)) {
2478: if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
2479: if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
2480: if (defined($$courseopt{$seclevel})) { return $$courseopt{$seclevel}; }
2481: }
2482:
2483: if (defined($courseopt)) {
2484: if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
2485: if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
2486: if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
2487: }
2488:
2489: # ----------------------------------------------------- third, check map parms
2490:
2491: my $thisparm=$$parmhash{$symbparm};
2492: if (defined($thisparm)) { return $thisparm; }
2493:
2494: # ----------------------------------------------------- fourth , check default
2495:
1.246 albertel 2496: my $meta_rwhat=$rwhat;
2497: $meta_rwhat=~s/\./_/g;
2498: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
2499: if (defined($default)) { return $default}
2500: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.133 bowersj2 2501: if (defined($default)) { return $default}
2502:
2503: # --------------------------------------------------- fifth , cascade up parts
2504:
2505: my ($space,@qualifier)=split(/\./,$rwhat);
2506: my $qualifier=join('.',@qualifier);
2507: unless ($space eq '0') {
1.160 albertel 2508: my @parts=split(/_/,$space);
2509: my $id=pop(@parts);
2510: my $part=join('_',@parts);
2511: if ($part eq '') { $part='0'; }
1.219 albertel 2512: my $partgeneral=$self->parmval($part.".$qualifier",$symb,1);
1.160 albertel 2513: if (defined($partgeneral)) { return $partgeneral; }
1.133 bowersj2 2514: }
1.219 albertel 2515: if ($recurse) { return undef; }
2516: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);
2517: if (defined($pack_def)) { return $pack_def; }
1.133 bowersj2 2518: return '';
1.145 bowersj2 2519: }
2520:
1.174 albertel 2521: =pod
1.145 bowersj2 2522:
1.174 albertel 2523: =item * B<getResourceByUrl>(url):
1.145 bowersj2 2524:
1.174 albertel 2525: Retrieves a resource object by URL of the resource. If passed a
2526: resource object, it will simply return it, so it is safe to use this
2527: method in code like "$res = $navmap->getResourceByUrl($res)", if
2528: you're not sure if $res is already an object, or just a URL. If the
2529: resource appears multiple times in the course, only the first instance
2530: will be returned. As a result, this is probably useful only for maps.
2531:
2532: =item * B<retrieveResources>(map, filterFunc, recursive, bailout):
2533:
2534: The map is a specification of a map to retreive the resources from,
2535: either as a url or as an object. The filterFunc is a reference to a
2536: function that takes a resource object as its one argument and returns
2537: true if the resource should be included, or false if it should not
2538: be. If recursive is true, the map will be recursively examined,
2539: otherwise it will not be. If bailout is true, the function will return
2540: as soon as it finds a resource, if false it will finish. By default,
2541: the map is the top-level map of the course, filterFunc is a function
2542: that always returns 1, recursive is true, bailout is false. The
2543: resources will be returned in a list containing the resource objects
2544: for the corresponding resources, with B<no structure information> in
2545: the list; regardless of branching, recursion, etc., it will be a flat
2546: list.
2547:
2548: Thus, this is suitable for cases where you don't want the structure,
2549: just a list of all resources. It is also suitable for finding out how
2550: many resources match a given description; for this use, if all you
2551: want to know is if I<any> resources match the description, the bailout
2552: parameter will allow you to avoid potentially expensive enumeration of
2553: all matching resources.
1.145 bowersj2 2554:
1.256 albertel 2555: =item * B<hasResource>(map, filterFunc, recursive):
1.145 bowersj2 2556:
1.174 albertel 2557: Convience method for
1.146 bowersj2 2558:
2559: scalar(retrieveResources($map, $filterFunc, $recursive, 1)) > 0
2560:
1.174 albertel 2561: which will tell whether the map has resources matching the description
2562: in the filter function.
1.146 bowersj2 2563:
1.145 bowersj2 2564: =cut
2565:
1.277 matthew 2566:
1.145 bowersj2 2567: sub getResourceByUrl {
2568: my $self = shift;
2569: my $resUrl = shift;
2570:
2571: if (ref($resUrl)) { return $resUrl; }
2572:
2573: $resUrl = &Apache::lonnet::clutter($resUrl);
2574: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
2575: if ($resId =~ /,/) {
2576: $resId = (split (/,/, $resId))[0];
2577: }
2578: if (!$resId) { return ''; }
2579: return $self->getById($resId);
2580: }
2581:
2582: sub retrieveResources {
2583: my $self = shift;
2584: my $map = shift;
2585: my $filterFunc = shift;
2586: if (!defined ($filterFunc)) {
2587: $filterFunc = sub {return 1;};
2588: }
2589: my $recursive = shift;
2590: if (!defined($recursive)) { $recursive = 1; }
2591: my $bailout = shift;
2592: if (!defined($bailout)) { $bailout = 0; }
2593:
2594: # Create the necessary iterator.
2595: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 2596: $map = $self->getResourceByUrl($map);
1.145 bowersj2 2597: }
2598:
1.213 bowersj2 2599: # If nothing was passed, assume top-level map
2600: if (!$map) {
2601: $map = $self->getById('0.0');
2602: }
2603:
1.145 bowersj2 2604: # Check the map's validity.
1.213 bowersj2 2605: if (!$map->is_map()) {
1.145 bowersj2 2606: # Oh, to throw an exception.... how I'd love that!
2607: return ();
2608: }
2609:
1.146 bowersj2 2610: # Get an iterator.
2611: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.215 bowersj2 2612: undef, $recursive);
1.146 bowersj2 2613:
2614: my @resources = ();
2615:
2616: # Run down the iterator and collect the resources.
1.222 bowersj2 2617: my $curRes;
2618:
2619: while ($curRes = $it->next()) {
1.146 bowersj2 2620: if (ref($curRes)) {
2621: if (!&$filterFunc($curRes)) {
2622: next;
2623: }
2624:
2625: push @resources, $curRes;
2626:
2627: if ($bailout) {
2628: return @resources;
2629: }
2630: }
2631:
2632: }
2633:
2634: return @resources;
2635: }
2636:
2637: sub hasResource {
2638: my $self = shift;
2639: my $map = shift;
2640: my $filterFunc = shift;
2641: my $recursive = shift;
2642:
2643: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1)) > 0;
1.133 bowersj2 2644: }
1.51 bowersj2 2645:
2646: 1;
2647:
2648: package Apache::lonnavmaps::iterator;
2649:
2650: =pod
2651:
2652: =back
2653:
1.174 albertel 2654: =head1 Object: navmap Iterator
1.51 bowersj2 2655:
1.174 albertel 2656: An I<iterator> encapsulates the logic required to traverse a data
2657: structure. navmap uses an iterator to traverse the course map
2658: according to the criteria you wish to use.
2659:
2660: To obtain an iterator, call the B<getIterator>() function of a
2661: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
2662: directly.) This will return a reference to the iterator:
1.51 bowersj2 2663:
2664: C<my $resourceIterator = $navmap-E<gt>getIterator();>
2665:
2666: To get the next thing from the iterator, call B<next>:
2667:
2668: C<my $nextThing = $resourceIterator-E<gt>next()>
2669:
2670: getIterator behaves as follows:
2671:
2672: =over 4
2673:
1.174 albertel 2674: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
2675:
2676: All parameters are optional. firstResource is a resource reference
2677: corresponding to where the iterator should start. It defaults to
2678: navmap->firstResource() for the corresponding nav map. finishResource
2679: corresponds to where you want the iterator to end, defaulting to
2680: navmap->finishResource(). filterHash is a hash used as a set
2681: containing strings representing the resource IDs, defaulting to
2682: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 2683: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 2684: recursed on. If it is a 1, only resources NOT in the filterHash will
2685: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
2686: false (default), the iterator will only return the first level of map
2687: that is not just a single, 'redirecting' map. If true, the iterator
2688: will return all information, starting with the top-level map,
2689: regardless of content. returnTopMap, if true (default false), will
2690: cause the iterator to return the top-level map object (resource 0.0)
2691: before anything else.
2692:
2693: Thus, by default, only top-level resources will be shown. Change the
2694: condition to a 1 without changing the hash, and all resources will be
2695: shown. Changing the condition to 1 and including some values in the
2696: hash will allow you to selectively suppress parts of the navmap, while
2697: leaving it on 0 and adding things to the hash will allow you to
2698: selectively add parts of the nav map. See the handler code for
2699: examples.
2700:
2701: The iterator will return either a reference to a resource object, or a
2702: token representing something in the map, such as the beginning of a
2703: new branch. The possible tokens are:
2704:
2705: =over 4
1.51 bowersj2 2706:
1.222 bowersj2 2707: =item * B<END_ITERATOR>:
2708:
2709: The iterator has returned all that it's going to. Further calls to the
2710: iterator will just produce more of these. This is a "false" value, and
2711: is the only false value the iterator which will be returned, so it can
2712: be used as a loop sentinel.
2713:
1.217 bowersj2 2714: =item * B<BEGIN_MAP>:
1.51 bowersj2 2715:
1.174 albertel 2716: A new map is being recursed into. This is returned I<after> the map
2717: resource itself is returned.
1.51 bowersj2 2718:
1.217 bowersj2 2719: =item * B<END_MAP>:
1.174 albertel 2720:
2721: The map is now done.
1.51 bowersj2 2722:
1.217 bowersj2 2723: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 2724:
1.174 albertel 2725: A branch is now starting. The next resource returned will be the first
2726: in that branch.
1.70 bowersj2 2727:
1.217 bowersj2 2728: =item * B<END_BRANCH>:
1.70 bowersj2 2729:
1.174 albertel 2730: The branch is now done.
1.51 bowersj2 2731:
2732: =back
2733:
1.174 albertel 2734: The tokens are retreivable via methods on the iterator object, i.e.,
2735: $iterator->END_MAP.
1.70 bowersj2 2736:
1.174 albertel 2737: Maps can contain empty resources. The iterator will automatically skip
2738: over such resources, but will still treat the structure
2739: correctly. Thus, a complicated map with several branches, but
2740: consisting entirely of empty resources except for one beginning or
2741: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
2742: but only one resource will be returned.
1.116 bowersj2 2743:
1.242 matthew 2744: =back
2745:
1.222 bowersj2 2746: =head2 Normal Usage
2747:
2748: Normal usage of the iterator object is to do the following:
2749:
2750: my $it = $navmap->getIterator([your params here]);
2751: my $curRes;
2752: while ($curRes = $it->next()) {
2753: [your logic here]
2754: }
2755:
2756: Note that inside of the loop, it's frequently useful to check if
2757: "$curRes" is a reference or not with the reference function; only
2758: resource objects will be references, and any non-references will
2759: be the tokens described above.
2760:
2761: Also note there is some old code floating around that trys to track
2762: the depth of the iterator to see when it's done; do not copy that
2763: code. It is difficult to get right and harder to understand then
2764: this. They should be migrated to this new style.
1.51 bowersj2 2765:
2766: =cut
2767:
2768: # Here are the tokens for the iterator:
2769:
1.222 bowersj2 2770: sub END_ITERATOR { return 0; }
1.51 bowersj2 2771: sub BEGIN_MAP { return 1; } # begining of a new map
2772: sub END_MAP { return 2; } # end of the map
2773: sub BEGIN_BRANCH { return 3; } # beginning of a branch
2774: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 2775: sub FORWARD { return 1; } # go forward
2776: sub BACKWARD { return 2; }
1.51 bowersj2 2777:
1.96 bowersj2 2778: sub min {
2779: (my $a, my $b) = @_;
2780: if ($a < $b) { return $a; } else { return $b; }
2781: }
2782:
1.94 bowersj2 2783: sub new {
2784: # magic invocation to create a class instance
2785: my $proto = shift;
2786: my $class = ref($proto) || $proto;
2787: my $self = {};
2788:
2789: $self->{NAV_MAP} = shift;
2790: return undef unless ($self->{NAV_MAP});
2791:
2792: # Handle the parameters
2793: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
2794: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
2795:
2796: # If the given resources are just the ID of the resource, get the
2797: # objects
2798: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
2799: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
2800: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
2801: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
2802:
2803: $self->{FILTER} = shift;
2804:
2805: # A hash, used as a set, of resource already seen
2806: $self->{ALREADY_SEEN} = shift;
2807: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
2808: $self->{CONDITION} = shift;
2809:
1.116 bowersj2 2810: # Do we want to automatically follow "redirection" maps?
2811: $self->{FORCE_TOP} = shift;
2812:
1.162 bowersj2 2813: # Do we want to return the top-level map object (resource 0.0)?
2814: $self->{RETURN_0} = shift;
2815: # have we done that yet?
2816: $self->{HAVE_RETURNED_0} = 0;
2817:
1.94 bowersj2 2818: # Now, we need to pre-process the map, by walking forward and backward
2819: # over the parts of the map we're going to look at.
1.96 bowersj2 2820:
1.97 bowersj2 2821: # The processing steps are exactly the same, except for a few small
2822: # changes, so I bundle those up in the following list of two elements:
2823: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
2824: # first_resource).
2825: # This prevents writing nearly-identical code twice.
2826: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
2827: 'FIRST_RESOURCE'],
2828: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
2829: 'FINISH_RESOURCE'] );
2830:
1.98 bowersj2 2831: my $maxDepth = 0; # tracks max depth
2832:
1.116 bowersj2 2833: # If there is only one resource in this map, and it's a map, we
2834: # want to remember that, so the user can ask for the first map
2835: # that isn't just a redirector.
2836: my $resource; my $resourceCount = 0;
2837:
1.209 bowersj2 2838: # Documentation on this algorithm can be found in the CVS repository at
2839: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
2840: # in that file.
1.107 bowersj2 2841: # **1**
2842:
1.97 bowersj2 2843: foreach my $pass (@iterations) {
2844: my $direction = $pass->[0];
2845: my $valName = $pass->[1];
2846: my $nextResourceMethod = $pass->[2];
2847: my $firstResourceName = $pass->[3];
2848:
2849: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
2850: $self->{FIRST_RESOURCE},
2851: $self->{FINISH_RESOURCE},
2852: {}, undef, 0, $direction);
1.96 bowersj2 2853:
1.97 bowersj2 2854: # prime the recursion
2855: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 2856: $iterator->next();
1.97 bowersj2 2857: my $curRes = $iterator->next();
1.222 bowersj2 2858: my $depth = 1;
2859: while ($depth > 0) {
2860: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
2861: if ($curRes == $iterator->END_MAP()) { $depth--; }
2862:
1.97 bowersj2 2863: if (ref($curRes)) {
1.116 bowersj2 2864: # If there's only one resource, this will save it
1.117 bowersj2 2865: # we have to filter empty resources from consideration here,
2866: # or even "empty", redirecting maps have two (start & finish)
2867: # or three (start, finish, plus redirector)
2868: if($direction == FORWARD && $curRes->src()) {
2869: $resource = $curRes; $resourceCount++;
2870: }
1.97 bowersj2 2871: my $resultingVal = $curRes->{DATA}->{$valName};
2872: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 2873: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 2874:
1.116 bowersj2 2875: if ($nextCount == 1) { # **3**
1.97 bowersj2 2876: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
2877: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
2878: }
2879:
1.116 bowersj2 2880: if ($nextCount > 1) { # **4**
1.97 bowersj2 2881: foreach my $res (@{$nextResources}) {
2882: my $current = $res->{DATA}->{$valName} || 999999999;
2883: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
2884: }
2885: }
2886: }
1.96 bowersj2 2887:
1.107 bowersj2 2888: # Assign the final val (**2**)
1.97 bowersj2 2889: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 2890: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
2891: $curRes->{DATA}->{BOT_UP_VAL});
2892:
2893: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
2894: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 2895: }
1.222 bowersj2 2896:
2897: $curRes = $iterator->next();
1.96 bowersj2 2898: }
2899: }
1.94 bowersj2 2900:
1.116 bowersj2 2901: # Check: Was this only one resource, a map?
1.255 albertel 2902: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 2903: my $firstResource = $resource->map_start();
2904: my $finishResource = $resource->map_finish();
2905: return
2906: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
2907: $finishResource, $self->{FILTER},
2908: $self->{ALREADY_SEEN},
2909: $self->{CONDITION}, 0);
2910:
2911: }
2912:
1.98 bowersj2 2913: # Set up some bookkeeping information.
2914: $self->{CURRENT_DEPTH} = 0;
2915: $self->{MAX_DEPTH} = $maxDepth;
2916: $self->{STACK} = [];
2917: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 2918: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 2919:
2920: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
2921: push @{$self->{STACK}}, [];
2922: }
2923:
1.107 bowersj2 2924: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 2925: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
2926: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
2927:
2928: bless ($self);
2929:
2930: return $self;
2931: }
2932:
2933: sub next {
2934: my $self = shift;
1.256 albertel 2935: my $closeAllPages=shift;
1.222 bowersj2 2936: if ($self->{FINISHED}) {
2937: return END_ITERATOR();
2938: }
2939:
1.162 bowersj2 2940: # If we want to return the top-level map object, and haven't yet,
2941: # do so.
2942: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
2943: $self->{HAVE_RETURNED_0} = 1;
2944: return $self->{NAV_MAP}->getById('0.0');
2945: }
1.98 bowersj2 2946:
2947: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2948: # grab the next from the recursive iterator
1.256 albertel 2949: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 2950:
2951: # is it a begin or end map? If so, update the depth
2952: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
2953: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
2954:
2955: # Are we back at depth 0? If so, stop recursing
2956: if ($self->{RECURSIVE_DEPTH} == 0) {
2957: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
2958: }
2959:
2960: return $next;
2961: }
2962:
2963: if (defined($self->{FORCE_NEXT})) {
2964: my $tmp = $self->{FORCE_NEXT};
2965: $self->{FORCE_NEXT} = undef;
2966: return $tmp;
2967: }
2968:
2969: # Have we not yet begun? If not, return BEGIN_MAP and
2970: # remember we've started.
2971: if ( !$self->{STARTED} ) {
2972: $self->{STARTED} = 1;
2973: return $self->BEGIN_MAP();
2974: }
2975:
2976: # Here's the guts of the iterator.
2977:
2978: # Find the next resource, if any.
2979: my $found = 0;
2980: my $i = $self->{MAX_DEPTH};
2981: my $newDepth;
2982: my $here;
2983: while ( $i >= 0 && !$found ) {
1.107 bowersj2 2984: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
2985: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 2986: $found = 1;
2987: $newDepth = $i;
2988: }
2989: $i--;
2990: }
2991:
2992: # If we still didn't find anything, we're done.
2993: if ( !$found ) {
2994: # We need to get back down to the correct branch depth
2995: if ( $self->{CURRENT_DEPTH} > 0 ) {
2996: $self->{CURRENT_DEPTH}--;
2997: return END_BRANCH();
2998: } else {
1.222 bowersj2 2999: $self->{FINISHED} = 1;
1.98 bowersj2 3000: return END_MAP();
3001: }
3002: }
3003:
1.104 bowersj2 3004: # If this is not a resource, it must be an END_BRANCH marker we want
3005: # to return directly.
1.107 bowersj2 3006: if (!ref($here)) { # **8**
1.104 bowersj2 3007: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3008: $self->{CURRENT_DEPTH}--;
3009: return $here;
3010: }
3011: }
3012:
3013: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3014: $self->{HERE} = $here;
3015:
1.98 bowersj2 3016: # Get to the right level
3017: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3018: push @{$self->{STACK}->[$newDepth]}, $here;
3019: $self->{CURRENT_DEPTH}--;
3020: return END_BRANCH();
3021: }
3022: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3023: push @{$self->{STACK}->[$newDepth]}, $here;
3024: $self->{CURRENT_DEPTH}++;
3025: return BEGIN_BRANCH();
3026: }
3027:
3028: # If we made it here, we have the next resource, and we're at the
3029: # right branch level. So let's examine the resource for where
3030: # we can get to from here.
3031:
3032: # So we need to look at all the resources we can get to from here,
3033: # categorize them if we haven't seen them, remember if we have a new
3034: my $nextUnfiltered = $here->getNext();
1.104 bowersj2 3035: my $maxDepthAdded = -1;
3036:
1.98 bowersj2 3037: for (@$nextUnfiltered) {
3038: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 3039: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3040: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 3041: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 3042: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 3043: }
3044: }
1.104 bowersj2 3045:
3046: # Is this the end of a branch? If so, all of the resources examined above
3047: # led to lower levels then the one we are currently at, so we push a END_BRANCH
3048: # marker onto the stack so we don't forget.
3049: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3050: # BC branch and gets to C, it will see F as the only next resource, but it's
3051: # one level lower. Thus, this is the end of the branch, since there are no
3052: # more resources added to this level or above.
1.111 bowersj2 3053: # We don't do this if the examined resource is the finish resource,
3054: # because the condition given above is true, but the "END_MAP" will
3055: # take care of things and we should already be at depth 0.
1.104 bowersj2 3056: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3057: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3058: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3059: }
3060:
1.98 bowersj2 3061: # That ends the main iterator logic. Now, do we want to recurse
3062: # down this map (if this resource is a map)?
1.256 albertel 3063: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3064: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3065: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3066: my $firstResource = $self->{HERE}->map_start();
3067: my $finishResource = $self->{HERE}->map_finish();
3068:
3069: $self->{RECURSIVE_ITERATOR} =
3070: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3071: $finishResource, $self->{FILTER},
3072: $self->{ALREADY_SEEN}, $self->{CONDITION});
3073: }
3074:
1.116 bowersj2 3075: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3076: # Should you ever find you need it, make sure to add an option to the code
3077: # that you can use; other things depend on this behavior.
1.138 bowersj2 3078: my $browsePriv = $self->{HERE}->browsePriv();
3079: if (!$self->{HERE}->src() ||
3080: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3081: return $self->next($closeAllPages);
1.116 bowersj2 3082: }
3083:
1.98 bowersj2 3084: return $self->{HERE};
3085:
3086: }
3087:
3088: =pod
3089:
1.174 albertel 3090: The other method available on the iterator is B<getStack>, which
3091: returns an array populated with the current 'stack' of maps, as
3092: references to the resource objects. Example: This is useful when
3093: making the navigation map, as we need to check whether we are under a
3094: page map to see if we need to link directly to the resource, or to the
3095: page. The first elements in the array will correspond to the top of
3096: the stack (most inclusive map).
1.98 bowersj2 3097:
3098: =cut
3099:
3100: sub getStack {
3101: my $self=shift;
3102:
3103: my @stack;
3104:
3105: $self->populateStack(\@stack);
3106:
3107: return \@stack;
3108: }
3109:
3110: # Private method: Calls the iterators recursively to populate the stack.
3111: sub populateStack {
3112: my $self=shift;
3113: my $stack = shift;
3114:
3115: push @$stack, $self->{HERE} if ($self->{HERE});
3116:
3117: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3118: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3119: }
1.94 bowersj2 3120: }
3121:
3122: 1;
3123:
3124: package Apache::lonnavmaps::DFSiterator;
3125:
1.100 bowersj2 3126: # Not documented in the perldoc: This is a simple iterator that just walks
3127: # through the nav map and presents the resources in a depth-first search
3128: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3129: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3130: # useful for pre-processing of some kind, and is in fact used by the main
3131: # iterator that way, but that's about it.
3132: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3133: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3134: # use might be found for it. - Jeremy
1.94 bowersj2 3135:
1.117 bowersj2 3136: # Unlike the main iterator, this DOES return all resources, even blank ones.
3137: # The main iterator needs them to correctly preprocess the map.
3138:
1.94 bowersj2 3139: sub BEGIN_MAP { return 1; } # begining of a new map
3140: sub END_MAP { return 2; } # end of the map
3141: sub FORWARD { return 1; } # go forward
3142: sub BACKWARD { return 2; }
3143:
1.100 bowersj2 3144: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3145: # filter hash ref (or undef), already seen hash or undef, condition
3146: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3147: sub new {
3148: # magic invocation to create a class instance
3149: my $proto = shift;
3150: my $class = ref($proto) || $proto;
3151: my $self = {};
3152:
3153: $self->{NAV_MAP} = shift;
3154: return undef unless ($self->{NAV_MAP});
3155:
3156: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3157: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3158:
3159: # If the given resources are just the ID of the resource, get the
3160: # objects
3161: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3162: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3163: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3164: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3165:
3166: $self->{FILTER} = shift;
3167:
3168: # A hash, used as a set, of resource already seen
3169: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3170: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3171: $self->{CONDITION} = shift;
1.89 bowersj2 3172: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3173:
1.100 bowersj2 3174: # Flag: Have we started yet?
1.51 bowersj2 3175: $self->{STARTED} = 0;
3176:
3177: # Should we continue calling the recursive iterator, if any?
3178: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3179: # The recursive iterator, if any
3180: $self->{RECURSIVE_ITERATOR} = undef;
3181: # Are we recursing on a map, or a branch?
3182: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3183: # And the count of how deep it is, so that this iterator can keep track of
3184: # when to pick back up again.
3185: $self->{RECURSIVE_DEPTH} = 0;
3186:
3187: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3188: $self->{STACK} = [];
1.51 bowersj2 3189:
3190: # Start with the first resource
1.89 bowersj2 3191: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3192: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3193: } else {
1.100 bowersj2 3194: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3195: }
1.51 bowersj2 3196:
3197: bless($self);
3198: return $self;
3199: }
3200:
3201: sub next {
3202: my $self = shift;
3203:
3204: # Are we using a recursive iterator? If so, pull from that and
3205: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3206: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3207: # grab the next from the recursive iterator
3208: my $next = $self->{RECURSIVE_ITERATOR}->next();
3209:
3210: # is it a begin or end map? Update depth if so
3211: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3212: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3213:
3214: # Are we back at depth 0? If so, stop recursing.
3215: if ($self->{RECURSIVE_DEPTH} == 0) {
3216: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3217: }
3218:
3219: return $next;
3220: }
3221:
3222: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3223: # END_MAP, which will end the iterator.
3224: if (scalar(@{$self->{STACK}}) == 0) {
3225: return $self->END_MAP();
1.51 bowersj2 3226: }
3227:
3228: # Have we not yet begun? If not, return BEGIN_MAP and
3229: # remember that we've started.
3230: if ( !$self->{STARTED} ) {
3231: $self->{STARTED} = 1;
3232: return $self->BEGIN_MAP;
3233: }
3234:
3235: # Get the next resource in the branch
1.100 bowersj2 3236: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3237:
1.100 bowersj2 3238: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3239: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3240:
3241: # Get the next possible resources
1.90 bowersj2 3242: my $nextUnfiltered;
1.89 bowersj2 3243: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3244: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3245: } else {
1.90 bowersj2 3246: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3247: }
1.51 bowersj2 3248: my $next = [];
3249:
3250: # filter the next possibilities to remove things we've
1.100 bowersj2 3251: # already seen.
1.51 bowersj2 3252: foreach (@$nextUnfiltered) {
1.52 bowersj2 3253: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
3254: push @$next, $_;
3255: }
1.51 bowersj2 3256: }
3257:
3258: while (@$next) {
1.100 bowersj2 3259: # copy the next possibilities over to the stack
3260: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3261: }
3262:
3263: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3264: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3265: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3266: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3267: my $firstResource = $self->{HERE}->map_start();
3268: my $finishResource = $self->{HERE}->map_finish();
3269:
3270: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3271: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3272: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3273: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3274: }
3275:
3276: return $self->{HERE};
1.190 bowersj2 3277: }
3278:
3279: # Identical to the full iterator methods of the same name. Hate to copy/paste
3280: # but I also hate to "inherit" either iterator from the other.
3281:
3282: sub getStack {
3283: my $self=shift;
3284:
3285: my @stack;
3286:
3287: $self->populateStack(\@stack);
3288:
3289: return \@stack;
3290: }
3291:
3292: # Private method: Calls the iterators recursively to populate the stack.
3293: sub populateStack {
3294: my $self=shift;
3295: my $stack = shift;
3296:
3297: push @$stack, $self->{HERE} if ($self->{HERE});
3298:
3299: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3300: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3301: }
1.51 bowersj2 3302: }
3303:
1.1 www 3304: 1;
1.2 www 3305:
1.51 bowersj2 3306: package Apache::lonnavmaps::resource;
3307:
3308: use Apache::lonnet;
3309:
3310: =pod
3311:
1.217 bowersj2 3312: =head1 Object: resource
1.51 bowersj2 3313:
1.217 bowersj2 3314: X<resource, navmap object>
1.174 albertel 3315: A resource object encapsulates a resource in a resource map, allowing
3316: easy manipulation of the resource, querying the properties of the
3317: resource (including user properties), and represents a reference that
3318: can be used as the canonical representation of the resource by
3319: lonnavmap clients like renderers.
3320:
3321: A resource only makes sense in the context of a navmap, as some of the
3322: data is stored in the navmap object.
3323:
3324: You will probably never need to instantiate this object directly. Use
3325: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3326: starting resource.
1.51 bowersj2 3327:
1.188 bowersj2 3328: Resource objects respect the parameter_hiddenparts, which suppresses
3329: various parts according to the wishes of the map author. As of this
3330: writing, there is no way to override this parameter, and suppressed
3331: parts will never be returned, nor will their response types or ids be
3332: stored.
3333:
1.217 bowersj2 3334: =head2 Overview
1.51 bowersj2 3335:
1.217 bowersj2 3336: A B<Resource> is the most granular type of object in LON-CAPA that can
3337: be included in a course. It can either be a particular resource, like
3338: an HTML page, external resource, problem, etc., or it can be a
3339: container sequence, such as a "page" or a "map".
3340:
3341: To see a sequence from the user's point of view, please see the
3342: B<Creating a Course: Maps and Sequences> chapter of the Author's
3343: Manual.
3344:
3345: A Resource Object, once obtained from a navmap object via a B<getBy*>
3346: method of the navmap, or from an iterator, allows you to query
3347: information about that resource.
3348:
3349: Generally, you do not ever want to create a resource object yourself,
3350: so creation has been left undocumented. Always retrieve resources
3351: from navmap objects.
3352:
3353: =head3 Identifying Resources
3354:
3355: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3356: unique to that resource for a given course. X<resource ID, in big hash>
3357: The Resource ID has the form #.#, where the first number is the same
3358: for every resource in a map, and the second is unique. For instance,
3359: for a course laid out like this:
3360:
3361: * Problem 1
3362: * Map
3363: * Resource 2
3364: * Resource 3
3365:
3366: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3367: C<Resource 3> will share a first number. The second number may end up
3368: re-used between the two groups.
3369:
3370: The resource ID is only used in the big hash, but can be used in the
3371: context of a course to identify a resource easily. (For instance, the
3372: printing system uses it to record which resources from a sequence you
3373: wish to print.)
3374:
3375: X<symb> X<resource, symb>
3376: All resources also have B<symb>s, which uniquely identify a resource
3377: in a course. Many internal LON-CAPA functions expect a symb. A symb
3378: carries along with it the URL of the resource, and the map it appears
3379: in. Symbs are much larger then resource IDs.
1.51 bowersj2 3380:
3381: =cut
3382:
3383: sub new {
3384: # magic invocation to create a class instance
3385: my $proto = shift;
3386: my $class = ref($proto) || $proto;
3387: my $self = {};
3388:
3389: $self->{NAV_MAP} = shift;
3390: $self->{ID} = shift;
3391:
3392: # Store this new resource in the parent nav map's cache.
3393: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 3394: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 3395:
3396: # A hash that can be used by two-pass algorithms to store data
3397: # about this resource in. Not used by the resource object
3398: # directly.
3399: $self->{DATA} = {};
3400:
3401: bless($self);
3402:
3403: return $self;
3404: }
3405:
1.70 bowersj2 3406: # private function: simplify the NAV_HASH lookups we keep doing
3407: # pass the name, and to automatically append my ID, pass a true val on the
3408: # second param
3409: sub navHash {
3410: my $self = shift;
3411: my $param = shift;
3412: my $id = shift;
1.115 bowersj2 3413: return $self->{NAV_MAP}->navhash($param . ($id?$self->{ID}:""));
1.70 bowersj2 3414: }
3415:
1.51 bowersj2 3416: =pod
3417:
1.217 bowersj2 3418: =head2 Methods
1.70 bowersj2 3419:
1.217 bowersj2 3420: Once you have a resource object, here's what you can do with it:
3421:
3422: =head3 Attribute Retrieval
3423:
3424: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 3425:
3426: =over 4
3427:
1.217 bowersj2 3428: =item * B<ID>: Every resource has an ID that is unique for that
3429: resource in the course it is in. The ID is actually in the hash
3430: representing the resource, so for a resource object $res, obtain
3431: it via C<$res->{ID}).
3432:
1.174 albertel 3433: =item * B<compTitle>:
3434:
3435: Returns a "composite title", that is equal to $res->title() if the
3436: resource has a title, and is otherwise the last part of the URL (e.g.,
3437: "problem.problem").
3438:
3439: =item * B<ext>:
3440:
3441: Returns true if the resource is external.
3442:
3443: =item * B<kind>:
3444:
3445: Returns the kind of the resource from the compiled nav map.
3446:
3447: =item * B<randomout>:
1.106 bowersj2 3448:
1.174 albertel 3449: Returns true if this resource was chosen to NOT be shown to the user
3450: by the random map selection feature. In other words, this is usually
3451: false.
1.70 bowersj2 3452:
1.174 albertel 3453: =item * B<randompick>:
1.70 bowersj2 3454:
1.174 albertel 3455: Returns true for a map if the randompick feature is being used on the
3456: map. (?)
1.70 bowersj2 3457:
1.174 albertel 3458: =item * B<src>:
1.51 bowersj2 3459:
1.174 albertel 3460: Returns the source for the resource.
1.70 bowersj2 3461:
1.174 albertel 3462: =item * B<symb>:
1.70 bowersj2 3463:
1.174 albertel 3464: Returns the symb for the resource.
1.70 bowersj2 3465:
1.174 albertel 3466: =item * B<title>:
1.70 bowersj2 3467:
1.174 albertel 3468: Returns the title of the resource.
3469:
1.51 bowersj2 3470: =back
3471:
3472: =cut
3473:
3474: # These info functions can be used directly, as they don't return
3475: # resource information.
1.85 bowersj2 3476: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.70 bowersj2 3477: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 3478: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 3479: # considered private and undocumented
1.51 bowersj2 3480: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
3481: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 3482: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
3483: sub randompick {
3484: my $self = shift;
3485: return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .
3486: '.0.parameter_randompick'};
3487: }
1.51 bowersj2 3488: sub src {
3489: my $self=shift;
3490: return $self->navHash("src_", 1);
3491: }
3492: sub symb {
3493: my $self=shift;
3494: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3495: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 3496: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 3497: . '___' . $second . '___' . $symbSrc;
1.223 albertel 3498: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 3499: }
1.213 bowersj2 3500: sub title {
3501: my $self=shift;
3502: if ($self->{ID} eq '0.0') {
3503: # If this is the top-level map, return the title of the course
3504: # since this map can not be titled otherwise.
3505: return $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
3506: }
3507: return $self->navHash("title_", 1); }
1.217 bowersj2 3508: # considered private and undocumented
1.70 bowersj2 3509: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.106 bowersj2 3510: sub compTitle {
3511: my $self = shift;
3512: my $title = $self->title();
1.176 www 3513: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 3514: if (!$title) {
3515: $title = $self->src();
3516: $title = substr($title, rindex($title, '/') + 1);
3517: }
3518: return $title;
3519: }
1.70 bowersj2 3520: =pod
3521:
3522: B<Predicate Testing the Resource>
3523:
3524: These methods are shortcuts to deciding if a given resource has a given property.
3525:
3526: =over 4
3527:
1.174 albertel 3528: =item * B<is_map>:
3529:
3530: Returns true if the resource is a map type.
3531:
3532: =item * B<is_problem>:
1.70 bowersj2 3533:
1.174 albertel 3534: Returns true if the resource is a problem type, false
3535: otherwise. (Looks at the extension on the src field; might need more
3536: to work correctly.)
1.70 bowersj2 3537:
1.174 albertel 3538: =item * B<is_page>:
1.70 bowersj2 3539:
1.174 albertel 3540: Returns true if the resource is a page.
3541:
3542: =item * B<is_sequence>:
3543:
3544: Returns true if the resource is a sequence.
1.70 bowersj2 3545:
3546: =back
3547:
3548: =cut
3549:
1.256 albertel 3550: sub hasResource {
3551: my $self = shift;
3552: return $self->{NAV_MAP}->hasResource(@_);
3553: }
3554:
3555: sub retrieveResources {
3556: my $self = shift;
3557: return $self->{NAV_MAP}->retrieveResources(@_);
3558: }
1.70 bowersj2 3559:
3560: sub is_html {
1.51 bowersj2 3561: my $self=shift;
3562: my $src = $self->src();
1.70 bowersj2 3563: return ($src =~ /html$/);
1.51 bowersj2 3564: }
1.70 bowersj2 3565: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
3566: sub is_page {
1.51 bowersj2 3567: my $self=shift;
3568: my $src = $self->src();
1.205 bowersj2 3569: return $self->navHash("is_map_", 1) &&
3570: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 3571: }
1.70 bowersj2 3572: sub is_problem {
1.51 bowersj2 3573: my $self=shift;
3574: my $src = $self->src();
1.256 albertel 3575: return ($src =~ /\.(problem|exam|quiz|assess|survey|form|library)$/)
3576: }
3577: sub contains_problem {
3578: my $self=shift;
3579: if ($self->is_page()) {
3580: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
3581: return $hasProblem;
3582: }
3583: return 0;
1.51 bowersj2 3584: }
1.70 bowersj2 3585: sub is_sequence {
1.51 bowersj2 3586: my $self=shift;
3587: my $src = $self->src();
1.205 bowersj2 3588: return $self->navHash("is_map_", 1) &&
3589: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 3590: }
1.261 matthew 3591: sub is_survey {
3592: my $self = shift();
3593: my $part = shift();
1.263 albertel 3594: if ($self->parmval('type',$part) eq 'survey') {
1.261 matthew 3595: return 1;
3596: }
1.263 albertel 3597: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 3598: return 1;
3599: }
3600: return 0;
3601: }
1.51 bowersj2 3602:
1.266 raeburn 3603: sub is_empty_sequence {
3604: my $self=shift;
3605: my $src = $self->src();
3606: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
3607: }
3608:
1.101 bowersj2 3609: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 3610: sub parmval {
3611: my $self = shift;
3612: my $what = shift;
1.185 bowersj2 3613: my $part = shift;
3614: if (!defined($part)) {
3615: $part = '0';
3616: }
1.51 bowersj2 3617: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
3618: }
3619:
1.70 bowersj2 3620: =pod
3621:
3622: B<Map Methods>
3623:
1.174 albertel 3624: These methods are useful for getting information about the map
3625: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 3626:
3627: =over 4
3628:
1.174 albertel 3629: =item * B<map_finish>:
3630:
3631: Returns a reference to a resource object corresponding to the finish
3632: resource of the map.
1.70 bowersj2 3633:
1.174 albertel 3634: =item * B<map_pc>:
1.70 bowersj2 3635:
1.174 albertel 3636: Returns the pc value of the map, which is the first number that
3637: appears in the resource ID of the resources in the map, and is the
3638: number that appears around the middle of the symbs of the resources in
3639: that map.
1.70 bowersj2 3640:
1.174 albertel 3641: =item * B<map_start>:
3642:
3643: Returns a reference to a resource object corresponding to the start
3644: resource of the map.
3645:
3646: =item * B<map_type>:
3647:
3648: Returns a string with the type of the map in it.
1.70 bowersj2 3649:
3650: =back
1.51 bowersj2 3651:
1.70 bowersj2 3652: =cut
1.51 bowersj2 3653:
3654: sub map_finish {
3655: my $self = shift;
3656: my $src = $self->src();
1.144 bowersj2 3657: $src = Apache::lonnet::clutter($src);
1.51 bowersj2 3658: my $res = $self->navHash("map_finish_$src", 0);
3659: $res = $self->{NAV_MAP}->getById($res);
3660: return $res;
3661: }
1.70 bowersj2 3662: sub map_pc {
3663: my $self = shift;
3664: my $src = $self->src();
3665: return $self->navHash("map_pc_$src", 0);
3666: }
1.51 bowersj2 3667: sub map_start {
3668: my $self = shift;
3669: my $src = $self->src();
1.144 bowersj2 3670: $src = Apache::lonnet::clutter($src);
1.51 bowersj2 3671: my $res = $self->navHash("map_start_$src", 0);
3672: $res = $self->{NAV_MAP}->getById($res);
3673: return $res;
3674: }
3675: sub map_type {
3676: my $self = shift;
3677: my $pc = $self->map_pc();
3678: return $self->navHash("map_type_$pc", 0);
3679: }
3680:
3681: #####
3682: # Property queries
3683: #####
3684:
3685: # These functions will be responsible for returning the CORRECT
3686: # VALUE for the parameter, no matter what. So while they may look
3687: # like direct calls to parmval, they can be more then that.
3688: # So, for instance, the duedate function should use the "duedatetype"
3689: # information, rather then the resource object user.
3690:
3691: =pod
3692:
3693: =head2 Resource Parameters
3694:
1.174 albertel 3695: In order to use the resource parameters correctly, the nav map must
3696: have been instantiated with genCourseAndUserOptions set to true, so
3697: the courseopt and useropt is read correctly. Then, you can call these
3698: functions to get the relevant parameters for the resource. Each
3699: function defaults to part "0", but can be directed to another part by
3700: passing the part as the parameter.
3701:
3702: These methods are responsible for getting the parameter correct, not
3703: merely reflecting the contents of the GDBM hashes. As we move towards
3704: dates relative to other dates, these methods should be updated to
3705: reflect that. (Then, anybody using these methods will not have to update
3706: their code.)
3707:
3708: =over 4
3709:
3710: =item * B<acc>:
3711:
3712: Get the Client IP/Name Access Control information.
1.51 bowersj2 3713:
1.174 albertel 3714: =item * B<answerdate>:
1.51 bowersj2 3715:
1.174 albertel 3716: Get the answer-reveal date for the problem.
3717:
1.211 bowersj2 3718: =item * B<awarded>:
3719:
3720: Gets the awarded value for the problem part. Requires genUserData set to
3721: true when the navmap object was created.
3722:
1.174 albertel 3723: =item * B<duedate>:
3724:
3725: Get the due date for the problem.
3726:
3727: =item * B<tries>:
3728:
3729: Get the number of tries the student has used on the problem.
3730:
3731: =item * B<maxtries>:
3732:
3733: Get the number of max tries allowed.
3734:
3735: =item * B<opendate>:
1.51 bowersj2 3736:
1.174 albertel 3737: Get the open date for the problem.
1.51 bowersj2 3738:
1.174 albertel 3739: =item * B<sig>:
1.51 bowersj2 3740:
1.174 albertel 3741: Get the significant figures setting.
1.51 bowersj2 3742:
1.174 albertel 3743: =item * B<tol>:
1.51 bowersj2 3744:
1.174 albertel 3745: Get the tolerance for the problem.
1.51 bowersj2 3746:
1.174 albertel 3747: =item * B<tries>:
1.51 bowersj2 3748:
1.174 albertel 3749: Get the number of tries the user has already used on the problem.
1.51 bowersj2 3750:
1.174 albertel 3751: =item * B<type>:
1.51 bowersj2 3752:
1.174 albertel 3753: Get the question type for the problem.
1.70 bowersj2 3754:
1.174 albertel 3755: =item * B<weight>:
1.51 bowersj2 3756:
1.174 albertel 3757: Get the weight for the problem.
1.51 bowersj2 3758:
3759: =back
3760:
3761: =cut
3762:
3763: sub acc {
3764: (my $self, my $part) = @_;
3765: return $self->parmval("acc", $part);
3766: }
3767: sub answerdate {
3768: (my $self, my $part) = @_;
3769: # Handle intervals
3770: if ($self->parmval("answerdate.type", $part) eq 'date_interval') {
3771: return $self->duedate($part) +
3772: $self->parmval("answerdate", $part);
3773: }
3774: return $self->parmval("answerdate", $part);
1.106 bowersj2 3775: }
1.211 bowersj2 3776: sub awarded {
3777: my $self = shift; my $part = shift;
1.221 bowersj2 3778: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 3779: if (!defined($part)) { $part = '0'; }
3780: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
3781: }
1.51 bowersj2 3782: sub duedate {
3783: (my $self, my $part) = @_;
1.260 albertel 3784: my $interval=$self->parmval("interval", $part);
3785: if ($interval) {
3786: my $first_access=&Apache::lonnet::get_first_access('map',$self->symb);
3787: if ($first_access) { return ($first_access+$interval); }
3788: }
1.51 bowersj2 3789: return $self->parmval("duedate", $part);
3790: }
3791: sub maxtries {
3792: (my $self, my $part) = @_;
3793: return $self->parmval("maxtries", $part);
3794: }
3795: sub opendate {
3796: (my $self, my $part) = @_;
3797: if ($self->parmval("opendate.type", $part) eq 'date_interval') {
3798: return $self->duedate($part) -
3799: $self->parmval("opendate", $part);
3800: }
3801: return $self->parmval("opendate");
3802: }
1.185 bowersj2 3803: sub problemstatus {
3804: (my $self, my $part) = @_;
1.236 bowersj2 3805: return lc $self->parmval("problemstatus", $part);
1.185 bowersj2 3806: }
1.51 bowersj2 3807: sub sig {
3808: (my $self, my $part) = @_;
3809: return $self->parmval("sig", $part);
3810: }
3811: sub tol {
3812: (my $self, my $part) = @_;
3813: return $self->parmval("tol", $part);
3814: }
1.108 bowersj2 3815: sub tries {
3816: my $self = shift;
3817: my $tries = $self->queryRestoreHash('tries', shift);
3818: if (!defined($tries)) { return '0';}
1.51 bowersj2 3819: return $tries;
3820: }
1.70 bowersj2 3821: sub type {
3822: (my $self, my $part) = @_;
3823: return $self->parmval("type", $part);
3824: }
1.109 bowersj2 3825: sub weight {
3826: my $self = shift; my $part = shift;
1.211 bowersj2 3827: if (!defined($part)) { $part = '0'; }
3828: return &Apache::lonnet::EXT('resource.'.$part.'.weight',
3829: $self->symb(), $ENV{'user.domain'},
3830: $ENV{'user.name'},
3831: $ENV{'request.course.sec'});
1.274 matthew 3832: }
3833: sub part_display {
3834: my $self= shift(); my $partID = shift();
3835: if (! defined($partID)) { $partID = '0'; }
3836: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
3837: $self->symb);
3838: if (! defined($display) || $display eq '') {
3839: $display = $partID;
3840: }
3841: return $display;
1.70 bowersj2 3842: }
1.51 bowersj2 3843:
3844: # Multiple things need this
3845: sub getReturnHash {
3846: my $self = shift;
3847:
3848: if (!defined($self->{RETURN_HASH})) {
1.84 bowersj2 3849: my %tmpHash = &Apache::lonnet::restore($self->symb());
1.51 bowersj2 3850: $self->{RETURN_HASH} = \%tmpHash;
3851: }
3852: }
3853:
3854: ######
3855: # Status queries
3856: ######
3857:
3858: # These methods query the status of problems.
3859:
3860: # If we need to count parts, this function determines the number of
3861: # parts from the metadata. When called, it returns a reference to a list
3862: # of strings corresponding to the parts. (Thus, using it in a scalar context
3863: # tells you how many parts you have in the problem:
3864: # $partcount = scalar($resource->countParts());
3865: # Don't use $self->{PARTS} directly because you don't know if it's been
3866: # computed yet.
3867:
3868: =pod
3869:
3870: =head2 Resource misc
3871:
3872: Misc. functions for the resource.
3873:
3874: =over 4
3875:
1.174 albertel 3876: =item * B<hasDiscussion>:
1.59 bowersj2 3877:
1.174 albertel 3878: Returns a false value if there has been discussion since the user last
3879: logged in, true if there has. Always returns false if the discussion
3880: data was not extracted when the nav map was constructed.
3881:
3882: =item * B<getFeedback>:
3883:
3884: Gets the feedback for the resource and returns the raw feedback string
3885: for the resource, or the null string if there is no feedback or the
3886: email data was not extracted when the nav map was constructed. Usually
3887: used like this:
1.59 bowersj2 3888:
3889: for (split(/\,/, $res->getFeedback())) {
3890: my $link = &Apache::lonnet::escape($_);
3891: ...
3892:
3893: and use the link as appropriate.
3894:
3895: =cut
3896:
3897: sub hasDiscussion {
3898: my $self = shift;
3899: return $self->{NAV_MAP}->hasDiscussion($self->symb());
3900: }
3901:
3902: sub getFeedback {
3903: my $self = shift;
1.124 bowersj2 3904: my $source = $self->src();
1.125 bowersj2 3905: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.124 bowersj2 3906: return $self->{NAV_MAP}->getFeedback($source);
3907: }
3908:
3909: sub getErrors {
3910: my $self = shift;
3911: my $source = $self->src();
3912: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
3913: return $self->{NAV_MAP}->getErrors($source);
1.59 bowersj2 3914: }
3915:
3916: =pod
3917:
1.174 albertel 3918: =item * B<parts>():
1.51 bowersj2 3919:
1.174 albertel 3920: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 3921: each part of the problem. Single part problems have only a part '0'.
3922: Multipart problems do not return their part '0', since they typically
3923: do not really matter.
1.174 albertel 3924:
3925: =item * B<countParts>():
3926:
3927: Returns the number of parts of the problem a student can answer. Thus,
3928: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 3929: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 3930:
1.290 matthew 3931: =item * B<countResponses>():
3932:
3933: Returns the total number of responses in the problem a student can answer.
3934:
3935: =item * B<responseTypes>():
3936:
3937: Returns a hash whose keys are the response types. The values are the number
3938: of times each response type is used. This is for the I<entire> problem, not
3939: just a single part.
3940:
1.192 bowersj2 3941: =item * B<multipart>():
3942:
1.193 bowersj2 3943: Returns true if the problem is multipart, false otherwise. Use this instead
3944: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 3945:
1.187 bowersj2 3946: =item * B<responseType>($part):
3947:
3948: Returns the response type of the part, without the word "response" on the
3949: end. Example return values: 'string', 'essay', 'numeric', etc.
3950:
1.193 bowersj2 3951: =item * B<responseIds>($part):
1.187 bowersj2 3952:
1.193 bowersj2 3953: Retreives the response IDs for the given part as an array reference containing
3954: strings naming the response IDs. This may be empty.
1.187 bowersj2 3955:
1.51 bowersj2 3956: =back
3957:
3958: =cut
3959:
3960: sub parts {
3961: my $self = shift;
3962:
1.192 bowersj2 3963: if ($self->ext) { return []; }
1.67 bowersj2 3964:
1.51 bowersj2 3965: $self->extractParts();
3966: return $self->{PARTS};
3967: }
3968:
3969: sub countParts {
3970: my $self = shift;
3971:
3972: my $parts = $self->parts();
1.191 bowersj2 3973:
3974: # If I left this here, then it's not necessary.
3975: #my $delta = 0;
3976: #for my $part (@$parts) {
3977: # if ($part eq '0') { $delta--; }
3978: #}
1.66 bowersj2 3979:
3980: if ($self->{RESOURCE_ERROR}) {
3981: return 0;
3982: }
3983:
1.191 bowersj2 3984: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 3985: }
3986:
1.290 matthew 3987: sub countResponses {
3988: my $self = shift;
3989: my $count;
1.293 matthew 3990: foreach my $part (@{$self->parts()}) {
3991: $count+= scalar($self->responseIds($part));
1.290 matthew 3992: }
3993: return $count;
3994: }
3995:
3996: sub responseTypes {
3997: my $self = shift;
1.291 albertel 3998: my %responses;
1.290 matthew 3999: foreach my $part ($self->parts()) {
4000: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 4001: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 4002: }
4003: }
1.291 albertel 4004: return %responses;
1.290 matthew 4005: }
4006:
1.192 bowersj2 4007: sub multipart {
4008: my $self = shift;
4009: return $self->countParts() > 1;
1.51 bowersj2 4010: }
4011:
1.225 bowersj2 4012: sub singlepart {
4013: my $self = shift;
4014: return $self->countParts() == 1;
4015: }
4016:
1.187 bowersj2 4017: sub responseType {
1.184 bowersj2 4018: my $self = shift;
4019: my $part = shift;
4020:
4021: $self->extractParts();
1.235 albertel 4022: if (defined($self->{RESPONSE_TYPES}->{$part})) {
4023: return @{$self->{RESPONSE_TYPES}->{$part}};
4024: } else {
4025: return undef;
4026: }
1.187 bowersj2 4027: }
4028:
1.193 bowersj2 4029: sub responseIds {
1.187 bowersj2 4030: my $self = shift;
4031: my $part = shift;
4032:
4033: $self->extractParts();
1.235 albertel 4034: if (defined($self->{RESPONSE_IDS}->{$part})) {
4035: return @{$self->{RESPONSE_IDS}->{$part}};
4036: } else {
4037: return undef;
4038: }
1.184 bowersj2 4039: }
4040:
4041: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 4042: # part types, and saves it.
1.51 bowersj2 4043: sub extractParts {
4044: my $self = shift;
4045:
1.153 bowersj2 4046: return if (defined($self->{PARTS}));
1.67 bowersj2 4047: return if ($self->ext);
1.51 bowersj2 4048:
4049: $self->{PARTS} = [];
4050:
1.181 bowersj2 4051: my %parts;
4052:
1.82 bowersj2 4053: # Retrieve part count, if this is a problem
4054: if ($self->is_problem()) {
1.240 albertel 4055: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 4056: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 4057:
1.239 bowersj2 4058: if ($partorder) {
4059: my @parts;
4060: for my $part (split (/,/,$partorder)) {
4061: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4062: push @parts, $part;
1.241 albertel 4063: $parts{$part} = 1;
1.239 bowersj2 4064: }
4065: }
4066: $self->{PARTS} = \@parts;
4067: } else {
4068: if (!$metadata) {
4069: $self->{RESOURCE_ERROR} = 1;
4070: $self->{PARTS} = [];
4071: $self->{PART_TYPE} = {};
4072: return;
4073: }
4074: foreach (split(/\,/,$metadata)) {
4075: if ($_ =~ /^part_(.*)$/) {
4076: my $part = $1;
4077: # This floods the logs if it blows up
4078: if (defined($parts{$part})) {
1.241 albertel 4079: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
4080: }
1.239 bowersj2 4081:
4082: # check to see if part is turned off.
4083:
4084: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4085: $parts{$part} = 1;
4086: }
4087: }
4088: }
4089: my @sortedParts = sort keys %parts;
4090: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 4091: }
1.82 bowersj2 4092:
1.187 bowersj2 4093:
1.284 matthew 4094: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 4095: my %responseIdHash;
4096: my %responseTypeHash;
4097:
1.189 bowersj2 4098:
4099: # Init the responseIdHash
4100: foreach (@{$self->{PARTS}}) {
4101: $responseIdHash{$_} = [];
4102: }
4103:
1.187 bowersj2 4104: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 4105: # response id are delimited by underscores, but both the part
1.187 bowersj2 4106: # name and response id can themselves have underscores in them.
4107: # So we have to use our knowlege of part names to figure out
4108: # where the part names begin and end, and even then, it is possible
4109: # to construct ambiguous situations.
4110: foreach (split /,/, $metadata) {
4111: if ($_ =~ /^([a-zA-Z]+)response_(.*)/) {
4112: my $responseType = $1;
4113: my $partStuff = $2;
4114: my $partIdSoFar = '';
4115: my @partChunks = split /_/, $partStuff;
4116: my $i = 0;
4117: for ($i = 0; $i < scalar(@partChunks); $i++) {
4118: if ($partIdSoFar) { $partIdSoFar .= '_'; }
4119: $partIdSoFar .= $partChunks[$i];
4120: if ($parts{$partIdSoFar}) {
4121: my @otherChunks = @partChunks[$i+1..$#partChunks];
4122: my $responseId = join('_', @otherChunks);
1.188 bowersj2 4123: push @{$responseIdHash{$partIdSoFar}}, $responseId;
1.233 matthew 4124: push @{$responseTypeHash{$partIdSoFar}}, $responseType;
1.187 bowersj2 4125: }
4126: }
4127: }
4128: }
1.264 albertel 4129: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 4130: #
4131: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 4132: if ($resorder) {
4133: my @resorder=split(/,/,$resorder);
4134: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 4135: my $i=0;
4136: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 4137: my @neworder;
4138: foreach my $possibleid (@resorder) {
4139: if (exists($resids{$possibleid})) {
1.286 albertel 4140: push(@neworder,$resids{$possibleid});
1.264 albertel 4141: }
4142: }
1.286 albertel 4143: my @ids;
4144: my @type;
4145: foreach my $element (@neworder) {
4146: push (@ids,$responseIdHash{$part}->[$element]);
4147: push (@type,$responseTypeHash{$part}->[$element]);
4148: }
4149: $responseIdHash{$part}=\@ids;
4150: $responseTypeHash{$part}=\@type;
1.264 albertel 4151: }
4152: }
1.187 bowersj2 4153: $self->{RESPONSE_IDS} = \%responseIdHash;
4154: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 4155: }
4156:
1.51 bowersj2 4157: return;
4158: }
4159:
4160: =pod
4161:
4162: =head2 Resource Status
4163:
1.174 albertel 4164: Problem resources have status information, reflecting their various
4165: dates and completion statuses.
1.51 bowersj2 4166:
1.174 albertel 4167: There are two aspects to the status: the date-related information and
4168: the completion information.
1.51 bowersj2 4169:
1.174 albertel 4170: Idiomatic usage of these two methods would probably look something
4171: like
1.51 bowersj2 4172:
4173: foreach ($resource->parts()) {
4174: my $dateStatus = $resource->getDateStatus($_);
4175: my $completionStatus = $resource->getCompletionStatus($_);
4176:
1.70 bowersj2 4177: or
4178:
4179: my $status = $resource->status($_);
4180:
1.51 bowersj2 4181: ... use it here ...
4182: }
4183:
1.174 albertel 4184: Which you use depends on exactly what you are looking for. The
4185: status() function has been optimized for the nav maps display and may
4186: not precisely match what you need elsewhere.
1.101 bowersj2 4187:
1.174 albertel 4188: The symbolic constants shown below can be accessed through the
4189: resource object: C<$res->OPEN>.
1.101 bowersj2 4190:
1.51 bowersj2 4191: =over 4
4192:
1.174 albertel 4193: =item * B<getDateStatus>($part):
4194:
4195: ($part defaults to 0). A convenience function that returns a symbolic
4196: constant telling you about the date status of the part. The possible
4197: return values are:
1.51 bowersj2 4198:
4199: =back
4200:
4201: B<Date Codes>
4202:
4203: =over 4
4204:
1.174 albertel 4205: =item * B<OPEN_LATER>:
4206:
4207: The problem will be opened later.
4208:
4209: =item * B<OPEN>:
4210:
4211: Open and not yet due.
4212:
1.51 bowersj2 4213:
1.174 albertel 4214: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4215:
1.174 albertel 4216: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 4217:
1.174 albertel 4218: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 4219:
1.174 albertel 4220: The due date has passed and there is no answer opening date set.
1.51 bowersj2 4221:
1.174 albertel 4222: =item * B<ANSWER_OPEN>:
1.51 bowersj2 4223:
1.174 albertel 4224: The answer date is here.
4225:
4226: =item * B<NETWORK_FAILURE>:
4227:
4228: The information is unknown due to network failure.
1.51 bowersj2 4229:
4230: =back
4231:
4232: =cut
4233:
4234: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 4235: sub OPEN_LATER { return 0; }
4236: sub OPEN { return 1; }
4237: sub PAST_DUE_NO_ANSWER { return 2; }
4238: sub PAST_DUE_ANSWER_LATER { return 3; }
4239: sub ANSWER_OPEN { return 4; }
4240: sub NOTHING_SET { return 5; }
4241: sub NETWORK_FAILURE { return 100; }
4242:
4243: # getDateStatus gets the date status for a given problem part.
4244: # Because answer date, due date, and open date are fully independent
4245: # (i.e., it is perfectly possible to *only* have an answer date),
4246: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
4247: # (past, future, none given). This function handles this with a decision
4248: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 4249:
4250: sub getDateStatus {
4251: my $self = shift;
4252: my $part = shift;
4253: $part = "0" if (!defined($part));
1.54 bowersj2 4254:
4255: # Always return network failure if there was one.
1.51 bowersj2 4256: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4257:
4258: my $now = time();
4259:
1.53 bowersj2 4260: my $open = $self->opendate($part);
4261: my $due = $self->duedate($part);
4262: my $answer = $self->answerdate($part);
4263:
4264: if (!$open && !$due && !$answer) {
4265: # no data on the problem at all
4266: # should this be the same as "open later"? think multipart.
4267: return $self->NOTHING_SET;
4268: }
1.59 bowersj2 4269: if (!$open || $now < $open) {return $self->OPEN_LATER}
4270: if (!$due || $now < $due) {return $self->OPEN}
4271: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
4272: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 4273: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 4274: }
4275:
4276: =pod
4277:
4278: B<>
4279:
4280: =over 4
4281:
1.174 albertel 4282: =item * B<getCompletionStatus>($part):
1.51 bowersj2 4283:
1.174 albertel 4284: ($part defaults to 0.) A convenience function that returns a symbolic
4285: constant telling you about the completion status of the part, with the
4286: following possible results:
4287:
4288: =back
1.51 bowersj2 4289:
4290: B<Completion Codes>
4291:
4292: =over 4
4293:
1.174 albertel 4294: =item * B<NOT_ATTEMPTED>:
4295:
4296: Has not been attempted at all.
4297:
4298: =item * B<INCORRECT>:
4299:
4300: Attempted, but wrong by student.
1.51 bowersj2 4301:
1.174 albertel 4302: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 4303:
1.174 albertel 4304: Attempted, but wrong by instructor override.
1.51 bowersj2 4305:
1.174 albertel 4306: =item * B<CORRECT>:
1.51 bowersj2 4307:
1.174 albertel 4308: Correct or correct by instructor.
1.51 bowersj2 4309:
1.174 albertel 4310: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 4311:
1.174 albertel 4312: Correct by instructor override.
1.51 bowersj2 4313:
1.174 albertel 4314: =item * B<EXCUSED>:
4315:
4316: Excused. Not yet implemented.
4317:
4318: =item * B<NETWORK_FAILURE>:
4319:
4320: Information not available due to network failure.
4321:
4322: =item * B<ATTEMPTED>:
4323:
4324: Attempted, and not yet graded.
1.69 bowersj2 4325:
1.51 bowersj2 4326: =back
4327:
4328: =cut
4329:
1.53 bowersj2 4330: sub NOT_ATTEMPTED { return 10; }
4331: sub INCORRECT { return 11; }
4332: sub INCORRECT_BY_OVERRIDE { return 12; }
4333: sub CORRECT { return 13; }
4334: sub CORRECT_BY_OVERRIDE { return 14; }
4335: sub EXCUSED { return 15; }
1.69 bowersj2 4336: sub ATTEMPTED { return 16; }
1.51 bowersj2 4337:
4338: sub getCompletionStatus {
4339: my $self = shift;
4340: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4341:
1.108 bowersj2 4342: my $status = $self->queryRestoreHash('solved', shift);
1.51 bowersj2 4343:
1.251 www 4344: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 4345: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 4346: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.51 bowersj2 4347: if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }
4348: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
4349: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
4350: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 4351: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 4352: return $self->NOT_ATTEMPTED;
1.108 bowersj2 4353: }
4354:
4355: sub queryRestoreHash {
4356: my $self = shift;
4357: my $hashentry = shift;
4358: my $part = shift;
1.185 bowersj2 4359: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 4360: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4361:
4362: $self->getReturnHash();
4363:
4364: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 4365: }
4366:
4367: =pod
4368:
4369: B<Composite Status>
4370:
1.174 albertel 4371: Along with directly returning the date or completion status, the
4372: resource object includes a convenience function B<status>() that will
4373: combine the two status tidbits into one composite status that can
1.191 bowersj2 4374: represent the status of the resource as a whole. This method represents
4375: the concept of the thing we want to display to the user on the nav maps
4376: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 4377: documented in the comments of the status method. The following results
4378: may be returned, all available as methods on the resource object
1.185 bowersj2 4379: ($res->NETWORK_FAILURE): In addition to the return values that match
4380: the date or completion status, this function can return "ANSWER_SUBMITTED"
4381: if that problemstatus parameter value is set to No, suppressing the
4382: incorrect/correct feedback.
1.51 bowersj2 4383:
4384: =over 4
4385:
1.174 albertel 4386: =item * B<NETWORK_FAILURE>:
4387:
4388: The network has failed and the information is not available.
1.51 bowersj2 4389:
1.174 albertel 4390: =item * B<NOTHING_SET>:
1.53 bowersj2 4391:
1.174 albertel 4392: No dates have been set for this problem (part) at all. (Because only
4393: certain parts of a multi-part problem may be assigned, this can not be
4394: collapsed into "open later", as we do not know a given part will EVER
4395: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 4396:
1.174 albertel 4397: =item * B<CORRECT>:
1.51 bowersj2 4398:
1.174 albertel 4399: For any reason at all, the part is considered correct.
1.54 bowersj2 4400:
1.174 albertel 4401: =item * B<EXCUSED>:
1.51 bowersj2 4402:
1.174 albertel 4403: For any reason at all, the problem is excused.
1.51 bowersj2 4404:
1.174 albertel 4405: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 4406:
1.174 albertel 4407: The problem is past due, not considered correct, and no answer date is
4408: set.
1.51 bowersj2 4409:
1.174 albertel 4410: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4411:
1.174 albertel 4412: The problem is past due, not considered correct, and an answer date in
4413: the future is set.
1.51 bowersj2 4414:
1.174 albertel 4415: =item * B<ANSWER_OPEN>:
4416:
4417: The problem is past due, not correct, and the answer is now available.
4418:
4419: =item * B<OPEN_LATER>:
4420:
4421: The problem is not yet open.
4422:
4423: =item * B<TRIES_LEFT>:
4424:
4425: The problem is open, has been tried, is not correct, but there are
4426: tries left.
4427:
4428: =item * B<INCORRECT>:
4429:
4430: The problem is open, and all tries have been used without getting the
4431: correct answer.
4432:
4433: =item * B<OPEN>:
4434:
4435: The item is open and not yet tried.
4436:
4437: =item * B<ATTEMPTED>:
4438:
4439: The problem has been attempted.
1.69 bowersj2 4440:
1.185 bowersj2 4441: =item * B<ANSWER_SUBMITTED>:
4442:
4443: An answer has been submitted, but the student should not see it.
4444:
1.51 bowersj2 4445: =back
4446:
4447: =cut
4448:
1.185 bowersj2 4449: sub TRIES_LEFT { return 20; }
4450: sub ANSWER_SUBMITTED { return 21; }
1.51 bowersj2 4451:
4452: sub status {
4453: my $self = shift;
4454: my $part = shift;
4455: if (!defined($part)) { $part = "0"; }
4456: my $completionStatus = $self->getCompletionStatus($part);
4457: my $dateStatus = $self->getDateStatus($part);
4458:
4459: # What we have is a two-dimensional matrix with 4 entries on one
4460: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 4461: # plus network failure and "no date data at all".
1.51 bowersj2 4462:
1.222 bowersj2 4463: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 4464: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 4465:
1.236 bowersj2 4466: my $suppressFeedback = $self->problemstatus($part) eq 'no';
4467: # If there's an answer date and we're past it, don't
4468: # suppress the feedback; student should know
4469: if ($self->answerdate($part) && $self->answerdate($part) < time()) {
4470: $suppressFeedback = 0;
4471: }
1.185 bowersj2 4472:
1.51 bowersj2 4473: # There are a few whole rows we can dispose of:
1.53 bowersj2 4474: if ($completionStatus == CORRECT ||
4475: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.185 bowersj2 4476: return $suppressFeedback? ANSWER_SUBMITTED : CORRECT;
1.69 bowersj2 4477: }
4478:
4479: if ($completionStatus == ATTEMPTED) {
4480: return ATTEMPTED;
1.53 bowersj2 4481: }
4482:
4483: # If it's EXCUSED, then return that no matter what
4484: if ($completionStatus == EXCUSED) {
4485: return EXCUSED;
1.51 bowersj2 4486: }
4487:
1.53 bowersj2 4488: if ($dateStatus == NOTHING_SET) {
4489: return NOTHING_SET;
1.51 bowersj2 4490: }
4491:
1.69 bowersj2 4492: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
4493: # by 4 matrix (date statuses).
1.51 bowersj2 4494:
1.54 bowersj2 4495: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 4496: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 4497: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 4498: }
4499:
1.53 bowersj2 4500: if ($dateStatus == ANSWER_OPEN) {
4501: return ANSWER_OPEN;
1.51 bowersj2 4502: }
4503:
4504: # Now: (incorrect, incorrect_override, not_attempted) x
4505: # (open_later), (open)
4506:
1.53 bowersj2 4507: if ($dateStatus == OPEN_LATER) {
4508: return OPEN_LATER;
1.51 bowersj2 4509: }
4510:
4511: # If it's WRONG...
1.53 bowersj2 4512: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 4513: # and there are TRIES LEFT:
1.79 bowersj2 4514: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 4515: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 4516: }
1.185 bowersj2 4517: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 4518: }
4519:
4520: # Otherwise, it's untried and open
1.53 bowersj2 4521: return OPEN;
1.224 bowersj2 4522: }
4523:
4524: sub CLOSED { return 23; }
4525: sub ERROR { return 24; }
4526:
4527: =pod
4528:
4529: B<Simple Status>
4530:
4531: Convenience method B<simpleStatus> provides a "simple status" for the resource.
4532: "Simple status" corresponds to "which icon is shown on the
4533: Navmaps". There are six "simple" statuses:
4534:
4535: =over 4
4536:
4537: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
4538:
4539: =item * B<OPEN>: The problem is open and unattempted.
4540:
4541: =item * B<CORRECT>: The problem is correct for any reason.
4542:
4543: =item * B<INCORRECT>: The problem is incorrect and can still be
4544: completed successfully.
4545:
4546: =item * B<ATTEMPTED>: The problem has been attempted, but the student
4547: does not know if they are correct. (The ellipsis icon.)
4548:
4549: =item * B<ERROR>: There is an error retrieving information about this
4550: problem.
4551:
4552: =back
4553:
4554: =cut
4555:
4556: # This hash maps the composite status to this simple status, and
4557: # can be used directly, if you like
4558: my %compositeToSimple =
4559: (
4560: NETWORK_FAILURE() => ERROR,
4561: NOTHING_SET() => CLOSED,
4562: CORRECT() => CORRECT,
4563: EXCUSED() => CORRECT,
4564: PAST_DUE_NO_ANSWER() => INCORRECT,
4565: PAST_DUE_ANSWER_LATER() => INCORRECT,
4566: ANSWER_OPEN() => INCORRECT,
4567: OPEN_LATER() => CLOSED,
4568: TRIES_LEFT() => OPEN,
4569: INCORRECT() => INCORRECT,
4570: OPEN() => OPEN,
4571: ATTEMPTED() => ATTEMPTED,
4572: ANSWER_SUBMITTED() => ATTEMPTED
4573: );
4574:
4575: sub simpleStatus {
4576: my $self = shift;
4577: my $part = shift;
4578: my $status = $self->status($part);
4579: return $compositeToSimple{$status};
1.225 bowersj2 4580: }
4581:
4582: =pod
4583:
4584: B<simpleStatusCount> will return an array reference containing, in
4585: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
4586: and ERROR parts the given problem has.
4587:
4588: =cut
4589:
4590: # This maps the status to the slot we want to increment
4591: my %statusToSlotMap =
4592: (
4593: OPEN() => 0,
4594: CLOSED() => 1,
4595: CORRECT() => 2,
4596: INCORRECT() => 3,
4597: ATTEMPTED() => 4,
4598: ERROR() => 5
4599: );
4600:
4601: sub statusToSlot { return $statusToSlotMap{shift()}; }
4602:
4603: sub simpleStatusCount {
4604: my $self = shift;
4605:
4606: my @counts = (0, 0, 0, 0, 0, 0, 0);
4607: foreach my $part (@{$self->parts()}) {
4608: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
4609: }
4610:
4611: return \@counts;
1.191 bowersj2 4612: }
4613:
4614: =pod
4615:
4616: B<Completable>
4617:
4618: The completable method represents the concept of I<whether the student can
4619: currently do the problem>. If the student can do the problem, which means
4620: that it is open, there are tries left, and if the problem is manually graded
4621: or the grade is suppressed via problemstatus, the student has not tried it
4622: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
4623: either the student has tried it and there is no feedback, or that for
4624: some reason it is no longer completable (not open yet, successfully completed,
4625: out of tries, etc.). As an example, this is used as the filter for the
4626: "Uncompleted Homework" option for the nav maps.
4627:
4628: If this does not quite meet your needs, do not fiddle with it (unless you are
4629: fixing it to better match the student's conception of "completable" because
4630: it's broken somehow)... make a new method.
4631:
4632: =cut
4633:
4634: sub completable {
4635: my $self = shift;
4636: if (!$self->is_problem()) { return 0; }
4637: my $partCount = $self->countParts();
4638:
4639: foreach my $part (@{$self->parts()}) {
4640: if ($part eq '0' && $partCount != 1) { next; }
4641: my $status = $self->status($part);
4642: # "If any of the parts are open, or have tries left (implies open),
4643: # and it is not "attempted" (manually graded problem), it is
4644: # not "complete"
1.216 bowersj2 4645: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
4646: $status == ANSWER_SUBMITTED() ) {
4647: # did this part already, as well as we can
4648: next;
4649: }
4650: if ($status == OPEN() || $status == TRIES_LEFT()) {
4651: return 1;
4652: }
1.191 bowersj2 4653: }
4654:
4655: # If all the parts were complete, so was this problem.
1.216 bowersj2 4656: return 0;
1.51 bowersj2 4657: }
4658:
4659: =pod
4660:
4661: =head2 Resource/Nav Map Navigation
4662:
4663: =over 4
4664:
1.174 albertel 4665: =item * B<getNext>():
4666:
4667: Retreive an array of the possible next resources after this
4668: one. Always returns an array, even in the one- or zero-element case.
4669:
4670: =item * B<getPrevious>():
1.85 bowersj2 4671:
1.174 albertel 4672: Retreive an array of the possible previous resources from this
4673: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 4674:
4675: =cut
4676:
4677: sub getNext {
4678: my $self = shift;
4679: my @branches;
4680: my $to = $self->to();
1.85 bowersj2 4681: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 4682: my $choice = $self->{NAV_MAP}->getById($branch);
4683: my $next = $choice->goesto();
4684: $next = $self->{NAV_MAP}->getById($next);
4685:
1.131 bowersj2 4686: push @branches, $next;
1.85 bowersj2 4687: }
4688: return \@branches;
4689: }
4690:
4691: sub getPrevious {
4692: my $self = shift;
4693: my @branches;
4694: my $from = $self->from();
4695: foreach my $branch ( split /,/, $from) {
4696: my $choice = $self->{NAV_MAP}->getById($branch);
4697: my $prev = $choice->comesfrom();
4698: $prev = $self->{NAV_MAP}->getById($prev);
4699:
1.131 bowersj2 4700: push @branches, $prev;
1.51 bowersj2 4701: }
4702: return \@branches;
1.131 bowersj2 4703: }
4704:
4705: sub browsePriv {
4706: my $self = shift;
4707: if (defined($self->{BROWSE_PRIV})) {
4708: return $self->{BROWSE_PRIV};
4709: }
4710:
4711: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre', $self->src());
1.51 bowersj2 4712: }
4713:
4714: =pod
1.2 www 4715:
1.51 bowersj2 4716: =back
1.2 www 4717:
1.51 bowersj2 4718: =cut
1.2 www 4719:
1.51 bowersj2 4720: 1;
1.2 www 4721:
1.51 bowersj2 4722: __END__
1.2 www 4723:
4724:
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