Annotation of loncom/interface/lonnavmaps.pm, revision 1.284
1.2 www 1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
1.1 www 3: #
1.284 ! matthew 4: # $Id: lonnavmaps.pm,v 1.283 2004/08/29 15:40:14 raeburn Exp $
1.20 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.245 www 28: ###
1.2 www 29:
1.1 www 30: package Apache::lonnavmaps;
31:
32: use strict;
1.2 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="$nav";
126:
127:
128: function gonav(url) {
129: if (w_loncapanav_flag != 1) {
130: go(url);
131: } else {
132: navwindow=window.open(url,
133: "loncapanav","height=600,width=400,scrollbars=1");
134: }
135: }
136: NAVCONTROL
137: }
138:
1.270 albertel 139: sub update {
140: if ($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"',
357: "Go To 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() || $res->is_map();
1.191 bowersj2 371: };
1.281 albertel 372: &add_linkitem(\%toplinkitems,'everything',
373: 'location.href="locatnavmaps?sort='.$ENV{'form.sort'}.'"',
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>
1.270 albertel 395: </select>
396: </nobr>
397: </form>");
1.133 bowersj2 398: # renderer call
1.270 albertel 399: my $renderArgs = { 'cols' => [0,2,3],
400: 'sort' => $ENV{'form.sort'},
1.191 bowersj2 401: 'url' => '/adm/navmaps',
402: 'navmap' => $navmap,
403: 'suppressNavmap' => 1,
404: 'suppressEmptySequences' => $suppressEmptySequences,
405: 'filterFunc' => $filterFunc,
1.201 bowersj2 406: 'resource_no_folder_link' => $resource_no_folder_link,
1.276 albertel 407: 'sort_html'=> $sort_html,
1.281 albertel 408: 'r' => $r,
409: 'caller' => 'navmapsdisplay',
410: 'linkitems' => \%toplinkitems};
1.191 bowersj2 411: my $render = render($renderArgs);
412: $navmap->untieHashes();
1.133 bowersj2 413:
1.191 bowersj2 414: # If no resources were printed, print a reassuring message so the
415: # user knows there was no error.
416: if ($renderArgs->{'counter'} == 0) {
417: if ($showOnlyHomework) {
1.229 www 418: $r->print("<p><font size='+1'>".&mt("All homework is currently completed").".</font></p>");
1.191 bowersj2 419: } else { # both jumpToFirstHomework and normal use the same: course must be empty
420: $r->print("<p><font size='+1'>This course is empty.</font></p>");
421: }
422: }
1.51 bowersj2 423:
1.128 bowersj2 424: $r->print("</body></html>");
1.134 bowersj2 425: $r->rflush();
1.59 bowersj2 426:
1.51 bowersj2 427: return OK;
428: }
429:
430: # Convenience functions: Returns a string that adds or subtracts
431: # the second argument from the first hash, appropriate for the
432: # query string that determines which folders to recurse on
433: sub addToFilter {
434: my $hashIn = shift;
435: my $addition = shift;
436: my %hash = %$hashIn;
437: $hash{$addition} = 1;
438:
439: return join (",", keys(%hash));
440: }
441:
442: sub removeFromFilter {
443: my $hashIn = shift;
444: my $subtraction = shift;
445: my %hash = %$hashIn;
446:
447: delete $hash{$subtraction};
448: return join(",", keys(%hash));
449: }
450:
451: # Convenience function: Given a stack returned from getStack on the iterator,
452: # return the correct src() value.
453: # Later, this should add an anchor when we start putting anchors in pages.
454: sub getLinkForResource {
455: my $stack = shift;
456: my $res;
457:
458: # Check to see if there are any pages in the stack
459: foreach $res (@$stack) {
1.248 www 460: if (defined($res)) {
461: if ($res->is_page()) {
462: return $res->src();
463: }
464: # in case folder was skipped over as "only sequence"
465: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
466: if ($map=~/\.page$/) {
1.249 www 467: return &Apache::lonnet::clutter($map).'#'.
468: &Apache::lonnet::escape(&Apache::lonnet::declutter($src));
1.248 www 469: }
1.51 bowersj2 470: }
471: }
472:
473: # Failing that, return the src of the last resource that is defined
474: # (when we first recurse on a map, it puts an undefined resource
475: # on the bottom because $self->{HERE} isn't defined yet, and we
476: # want the src for the map anyhow)
477: foreach (@$stack) {
478: if (defined($_)) { $res = $_; }
479: }
480:
481: return $res->src();
482: }
483:
1.251 www 484: # Convenience function: This separates the logic of how to create
1.53 bowersj2 485: # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
1.251 www 486: # etc.) into a separate function. It takes a resource object as the
1.53 bowersj2 487: # first parameter, and the part number of the resource as the second.
488: # It's basically a big switch statement on the status of the resource.
489:
490: sub getDescription {
491: my $res = shift;
492: my $part = shift;
1.69 bowersj2 493: my $status = $res->status($part);
1.53 bowersj2 494:
1.182 bowersj2 495: if ($status == $res->NETWORK_FAILURE) {
1.229 www 496: return &mt("Having technical difficulties; please check status later");
1.182 bowersj2 497: }
1.53 bowersj2 498: if ($status == $res->NOTHING_SET) {
1.229 www 499: return &mt("Not currently assigned.");
1.53 bowersj2 500: }
501: if ($status == $res->OPEN_LATER) {
1.73 bowersj2 502: return "Open " . timeToHumanString($res->opendate($part));
1.53 bowersj2 503: }
504: if ($status == $res->OPEN) {
1.79 bowersj2 505: if ($res->duedate($part)) {
1.229 www 506: return &mt("Due")." " .timeToHumanString($res->duedate($part));
1.66 bowersj2 507: } else {
1.229 www 508: return &mt("Open, no due date");
1.66 bowersj2 509: }
1.53 bowersj2 510: }
1.54 bowersj2 511: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.229 www 512: return &mt("Answer open")." " . timeToHumanString($res->answerdate($part));
1.54 bowersj2 513: }
514: if ($status == $res->PAST_DUE_NO_ANSWER) {
1.229 www 515: return &mt("Was due")." " . timeToHumanString($res->duedate($part));
1.53 bowersj2 516: }
517: if ($status == $res->ANSWER_OPEN) {
1.229 www 518: return &mt("Answer available");
1.53 bowersj2 519: }
1.59 bowersj2 520: if ($status == $res->EXCUSED) {
1.229 www 521: return &mt("Excused by instructor");
1.59 bowersj2 522: }
1.69 bowersj2 523: if ($status == $res->ATTEMPTED) {
1.229 www 524: return &mt("Answer submitted, not yet graded");
1.69 bowersj2 525: }
1.59 bowersj2 526: if ($status == $res->TRIES_LEFT) {
1.79 bowersj2 527: my $tries = $res->tries($part);
528: my $maxtries = $res->maxtries($part);
529: my $triesString = "";
530: if ($tries && $maxtries) {
531: $triesString = "<font size=\"-1\"><i>($tries of $maxtries tries used)</i></font>";
532: if ($maxtries > 1 && $maxtries - $tries == 1) {
533: $triesString = "<b>$triesString</b>";
534: }
535: }
1.244 albertel 536: if ($res->duedate($part)) {
1.229 www 537: return &mt("Due")." " . timeToHumanString($res->duedate($part)) .
1.66 bowersj2 538: " $triesString";
539: } else {
1.229 www 540: return &mt("No due date")." $triesString";
1.66 bowersj2 541: }
1.59 bowersj2 542: }
1.185 bowersj2 543: if ($status == $res->ANSWER_SUBMITTED) {
1.229 www 544: return &mt('Answer submitted');
1.185 bowersj2 545: }
1.53 bowersj2 546: }
547:
1.115 bowersj2 548: # Convenience function, so others can use it: Is the problem due in less then
549: # 24 hours, and still can be done?
550:
1.252 matthew 551: sub dueInLessThan24Hours {
1.115 bowersj2 552: my $res = shift;
553: my $part = shift;
554: my $status = $res->status($part);
555:
1.207 bowersj2 556: return ($status == $res->OPEN() ||
1.115 bowersj2 557: $status == $res->TRIES_LEFT()) &&
1.244 albertel 558: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
559: $res->duedate($part) > time();
1.115 bowersj2 560: }
561:
562: # Convenience function, so others can use it: Is there only one try remaining for the
563: # part, with more then one try to begin with, not due yet and still can be done?
564: sub lastTry {
565: my $res = shift;
566: my $part = shift;
567:
568: my $tries = $res->tries($part);
569: my $maxtries = $res->maxtries($part);
570: return $tries && $maxtries && $maxtries > 1 &&
1.244 albertel 571: $maxtries - $tries == 1 && $res->duedate($part) &&
572: $res->duedate($part) > time();
1.115 bowersj2 573: }
574:
1.101 bowersj2 575: # This puts a human-readable name on the ENV variable.
1.177 www 576:
1.68 bowersj2 577: sub advancedUser {
1.177 www 578: return $ENV{'request.role.adv'};
1.68 bowersj2 579: }
580:
1.73 bowersj2 581:
582: # timeToHumanString takes a time number and converts it to a
583: # human-readable representation, meant to be used in the following
584: # manner:
585: # print "Due $timestring"
586: # print "Open $timestring"
587: # print "Answer available $timestring"
588: # Very, very, very, VERY English-only... goodness help a localizer on
589: # this func...
1.53 bowersj2 590: sub timeToHumanString {
1.58 albertel 591: my ($time) = @_;
592: # zero, '0' and blank are bad times
1.73 bowersj2 593: if (!$time) {
1.229 www 594: return &mt('never');
1.73 bowersj2 595: }
1.231 www 596: unless (&Apache::lonlocal::current_language()=~/^en/) {
1.237 www 597: return &Apache::lonlocal::locallocaltime($time);
1.229 www 598: }
1.73 bowersj2 599: my $now = time();
600:
601: my @time = localtime($time);
602: my @now = localtime($now);
603:
604: # Positive = future
605: my $delta = $time - $now;
606:
607: my $minute = 60;
608: my $hour = 60 * $minute;
609: my $day = 24 * $hour;
610: my $week = 7 * $day;
611: my $inPast = 0;
612:
613: # Logic in comments:
614: # Is it now? (extremely unlikely)
615: if ( $delta == 0 ) {
616: return "this instant";
617: }
618:
619: if ($delta < 0) {
620: $inPast = 1;
621: $delta = -$delta;
622: }
623:
624: if ( $delta > 0 ) {
1.101 bowersj2 625:
1.73 bowersj2 626: my $tense = $inPast ? " ago" : "";
627: my $prefix = $inPast ? "" : "in ";
1.101 bowersj2 628:
629: # Less then a minute
1.73 bowersj2 630: if ( $delta < $minute ) {
631: if ($delta == 1) { return "${prefix}1 second$tense"; }
632: return "$prefix$delta seconds$tense";
633: }
634:
1.101 bowersj2 635: # Less then an hour
1.73 bowersj2 636: if ( $delta < $hour ) {
637: # If so, use minutes
638: my $minutes = floor($delta / 60);
639: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
640: return "$prefix$minutes minutes$tense";
641: }
642:
643: # Is it less then 24 hours away? If so,
644: # display hours + minutes
645: if ( $delta < $hour * 24) {
646: my $hours = floor($delta / $hour);
647: my $minutes = floor(($delta % $hour) / $minute);
648: my $hourString = "$hours hours";
649: my $minuteString = ", $minutes minutes";
650: if ($hours == 1) {
651: $hourString = "1 hour";
652: }
653: if ($minutes == 1) {
654: $minuteString = ", 1 minute";
655: }
656: if ($minutes == 0) {
657: $minuteString = "";
658: }
659: return "$prefix$hourString$minuteString$tense";
660: }
661:
662: # Less then 5 days away, display day of the week and
663: # HH:MM
664: if ( $delta < $day * 5 ) {
1.85 bowersj2 665: my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
1.238 albertel 666: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 667: $timeStr =~ s/12:00 pm/noon/;
668: return ($inPast ? "last " : "next ") .
669: $timeStr;
670: }
671:
672: # Is it this year?
673: if ( $time[5] == $now[5]) {
674: # Return on Month Day, HH:MM meridian
675: my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));
1.238 albertel 676: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 677: $timeStr =~ s/12:00 pm/noon/;
678: return $timeStr;
679: }
680:
681: # Not this year, so show the year
1.279 albertel 682: my $timeStr = strftime("on %A, %b %e %Y at %I:%M %P", localtime($time));
1.238 albertel 683: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 684: $timeStr =~ s/12:00 pm/noon/;
685: return $timeStr;
1.58 albertel 686: }
1.53 bowersj2 687: }
688:
1.51 bowersj2 689:
1.133 bowersj2 690: =pod
691:
1.174 albertel 692: =head1 NAME
693:
1.217 bowersj2 694: Apache::lonnavmap - Subroutines to handle and render the navigation
695: maps
1.174 albertel 696:
697: =head1 SYNOPSIS
698:
699: The main handler generates the navigational listing for the course,
700: the other objects export this information in a usable fashion for
1.205 bowersj2 701: other modules.
1.133 bowersj2 702:
1.216 bowersj2 703: =head1 OVERVIEW
704:
1.217 bowersj2 705: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
1.218 bowersj2 706: course structure and caches it in what is often referred to as the
707: "big hash" X<big hash>. You can see it if you are logged into
708: LON-CAPA, in a course, by going to /adm/test. (You may need to
709: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
710: content of the hash will be under the heading "Big Hash".
1.216 bowersj2 711:
712: Big Hash contains, among other things, how resources are related
713: to each other (next/previous), what resources are maps, which
714: resources are being chosen to not show to the student (for random
715: selection), and a lot of other things that can take a lot of time
716: to compute due to the amount of data that needs to be collected and
717: processed.
718:
719: Apache::lonnavmaps provides an object model for manipulating this
720: information in a higher-level fashion then directly manipulating
721: the hash. It also provides access to several auxilary functions
722: that aren't necessarily stored in the Big Hash, but are a per-
723: resource sort of value, like whether there is any feedback on
724: a given resource.
725:
726: Apache::lonnavmaps also abstracts away branching, and someday,
727: conditions, for the times where you don't really care about those
728: things.
729:
730: Apache::lonnavmaps also provides fairly powerful routines for
731: rendering navmaps, and last but not least, provides the navmaps
732: view for when the user clicks the NAV button.
733:
734: B<Note>: Apache::lonnavmaps I<only> works for the "currently
735: logged in user"; if you want things like "due dates for another
736: student" lonnavmaps can not directly retrieve information like
737: that. You need the EXT function. This module can still help,
738: because many things, such as the course structure, are constant
739: between users, and Apache::lonnavmaps can help by providing
740: symbs for the EXT call.
741:
742: The rest of this file will cover the provided rendering routines,
743: which can often be used without fiddling with the navmap object at
744: all, then documents the Apache::lonnavmaps::navmap object, which
745: is the key to accessing the Big Hash information, covers the use
746: of the Iterator (which provides the logic for traversing the
747: somewhat-complicated Big Hash data structure), documents the
748: Apache::lonnavmaps::Resource objects that are returned by
749:
1.205 bowersj2 750: =head1 Subroutine: render
1.133 bowersj2 751:
1.174 albertel 752: The navmap renderer package provides a sophisticated rendering of the
753: standard navigation maps interface into HTML. The provided nav map
754: handler is actually just a glorified call to this.
1.133 bowersj2 755:
1.216 bowersj2 756: Because of the large number of parameters this function accepts,
1.174 albertel 757: instead of passing it arguments as is normal, pass it in an anonymous
1.216 bowersj2 758: hash with the desired options.
1.174 albertel 759:
760: The package provides a function called 'render', called as
1.205 bowersj2 761: Apache::lonnavmaps::render({}).
1.51 bowersj2 762:
1.133 bowersj2 763: =head2 Overview of Columns
1.51 bowersj2 764:
1.174 albertel 765: The renderer will build an HTML table for the navmap and return
766: it. The table is consists of several columns, and a row for each
767: resource (or possibly each part). You tell the renderer how many
768: columns to create and what to place in each column, optionally using
1.205 bowersj2 769: one or more of the prepared columns, and the renderer will assemble
1.174 albertel 770: the table.
771:
772: Any additional generally useful column types should be placed in the
773: renderer code here, so anybody can use it anywhere else. Any code
774: specific to the current application (such as the addition of <input>
775: elements in a column) should be placed in the code of the thing using
776: the renderer.
777:
778: At the core of the renderer is the array reference COLS (see Example
779: section below for how to pass this correctly). The COLS array will
780: consist of entries of one of two types of things: Either an integer
781: representing one of the pre-packaged column types, or a sub reference
782: that takes a resource reference, a part number, and a reference to the
783: argument hash passed to the renderer, and returns a string that will
784: be inserted into the HTML representation as it.
785:
1.216 bowersj2 786: All other parameters are ways of either changing how the columns
787: are printing, or which rows are shown.
788:
1.174 albertel 789: The pre-packaged column names are refered to by constants in the
1.205 bowersj2 790: Apache::lonnavmaps namespace. The following currently exist:
1.51 bowersj2 791:
1.174 albertel 792: =over 4
1.51 bowersj2 793:
1.216 bowersj2 794: =item * B<Apache::lonnavmaps::resource>:
1.51 bowersj2 795:
1.174 albertel 796: The general info about the resource: Link, icon for the type, etc. The
1.216 bowersj2 797: first column in the standard nav map display. This column provides the
798: indentation effect seen in the B<NAV> screen. This column also accepts
1.205 bowersj2 799: the following parameters in the renderer hash:
1.51 bowersj2 800:
1.133 bowersj2 801: =over 4
1.51 bowersj2 802:
1.216 bowersj2 803: =item * B<resource_nolink>: default false
1.51 bowersj2 804:
1.216 bowersj2 805: If true, the resource will not be linked. By default, all non-folder
806: resources are linked.
1.174 albertel 807:
1.216 bowersj2 808: =item * B<resource_part_count>: default true
1.51 bowersj2 809:
1.216 bowersj2 810: If true, the resource will show a part count B<if> the full
811: part list is not displayed. (See "condense_parts" later.) If false,
812: the resource will never show a part count.
1.133 bowersj2 813:
1.174 albertel 814: =item * B<resource_no_folder_link>:
1.133 bowersj2 815:
1.174 albertel 816: If true, the resource's folder will not be clickable to open or close
817: it. Default is false. True implies printCloseAll is false, since you
818: can't close or open folders when this is on anyhow.
1.144 bowersj2 819:
1.133 bowersj2 820: =back
1.51 bowersj2 821:
1.225 bowersj2 822: =item * B<Apache::lonnavmaps::communication_status>:
1.174 albertel 823:
824: Whether there is discussion on the resource, email for the user, or
825: (lumped in here) perl errors in the execution of the problem. This is
826: the second column in the main nav map.
827:
1.225 bowersj2 828: =item * B<Apache::lonnavmaps::quick_status>:
1.51 bowersj2 829:
1.216 bowersj2 830: An icon for the status of a problem, with five possible states:
831: Correct, incorrect, open, awaiting grading (for a problem where the
832: computer's grade is suppressed, or the computer can't grade, like
833: essay problem), or none (not open yet, not a problem). The
1.174 albertel 834: third column of the standard navmap.
1.51 bowersj2 835:
1.225 bowersj2 836: =item * B<Apache::lonnavmaps::long_status>:
1.174 albertel 837:
838: A text readout of the details of the current status of the problem,
839: such as "Due in 22 hours". The fourth column of the standard navmap.
1.51 bowersj2 840:
1.225 bowersj2 841: =item * B<Apache::lonnavmaps::part_status_summary>:
842:
843: A text readout summarizing the status of the problem. If it is a
844: single part problem, will display "Correct", "Incorrect",
845: "Not yet open", "Open", "Attempted", or "Error". If there are
846: multiple parts, this will output a string that in HTML will show a
847: status of how many parts are in each status, in color coding, trying
848: to match the colors of the icons within reason.
849:
850: Note this only makes sense if you are I<not> showing parts. If
851: C<showParts> is true (see below), this column will not output
852: anything.
853:
1.133 bowersj2 854: =back
1.51 bowersj2 855:
1.133 bowersj2 856: If you add any others please be sure to document them here.
1.51 bowersj2 857:
1.174 albertel 858: An example of a column renderer that will show the ID number of a
859: resource, along with the part name if any:
1.51 bowersj2 860:
1.133 bowersj2 861: sub {
862: my ($resource, $part, $params) = @_;
863: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
864: return '<td>' . $resource->{ID} . '</td>';
865: }
1.51 bowersj2 866:
1.174 albertel 867: Note these functions are responsible for the TD tags, which allow them
868: to override vertical and horizontal alignment, etc.
1.130 www 869:
1.133 bowersj2 870: =head2 Parameters
1.115 bowersj2 871:
1.217 bowersj2 872: Minimally, you should be
1.174 albertel 873: able to get away with just using 'cols' (to specify the columns
874: shown), 'url' (necessary for the folders to link to the current screen
875: correctly), and possibly 'queryString' if your app calls for it. In
876: that case, maintaining the state of the folders will be done
877: automatically.
1.140 bowersj2 878:
1.133 bowersj2 879: =over 4
1.51 bowersj2 880:
1.216 bowersj2 881: =item * B<iterator>: default: constructs one from %ENV
1.174 albertel 882:
883: A reference to a fresh ::iterator to use from the navmaps. The
884: rendering will reflect the options passed to the iterator, so you can
885: use that to just render a certain part of the course, if you like. If
886: one is not passed, the renderer will attempt to construct one from
887: ENV{'form.filter'} and ENV{'form.condition'} information, plus the
888: 'iterator_map' parameter if any.
889:
1.216 bowersj2 890: =item * B<iterator_map>: default: not used
1.174 albertel 891:
892: If you are letting the renderer do the iterator handling, you can
893: instruct the renderer to render only a particular map by passing it
894: the source of the map you want to process, like
895: '/res/103/jerf/navmap.course.sequence'.
896:
1.216 bowersj2 897: =item * B<navmap>: default: constructs one from %ENV
1.174 albertel 898:
899: A reference to a navmap, used only if an iterator is not passed in. If
900: this is necessary to make an iterator but it is not passed in, a new
901: one will be constructed based on ENV info. This is useful to do basic
902: error checking before passing it off to render.
903:
1.216 bowersj2 904: =item * B<r>: default: must be passed in
1.174 albertel 905:
906: The standard Apache response object. This must be passed to the
907: renderer or the course hash will be locked.
908:
1.216 bowersj2 909: =item * B<cols>: default: empty (useless)
1.174 albertel 910:
911: An array reference
912:
1.216 bowersj2 913: =item * B<showParts>:default true
1.174 albertel 914:
1.216 bowersj2 915: A flag. If true, a line for the resource itself, and a line
1.174 albertel 916: for each part will be displayed. If not, only one line for each
917: resource will be displayed.
918:
1.216 bowersj2 919: =item * B<condenseParts>: default true
1.174 albertel 920:
1.216 bowersj2 921: A flag. If true, if all parts of the problem have the same
1.174 albertel 922: status and that status is Nothing Set, Correct, or Network Failure,
923: then only one line will be displayed for that resource anyhow. If no,
924: all parts will always be displayed. If showParts is 0, this is
925: ignored.
926:
1.216 bowersj2 927: =item * B<jumpCount>: default: determined from %ENV
1.174 albertel 928:
1.216 bowersj2 929: A string identifying the URL to place the anchor 'curloc' at.
930: It is the responsibility of the renderer user to
1.174 albertel 931: ensure that the #curloc is in the URL. By default, determined through
932: the use of the ENV{} 'jump' information, and should normally "just
933: work" correctly.
1.144 bowersj2 934:
1.216 bowersj2 935: =item * B<here>: default: empty string
1.140 bowersj2 936:
1.216 bowersj2 937: A Symb identifying where to place the 'here' marker. The empty
938: string means no marker.
1.92 bowersj2 939:
1.216 bowersj2 940: =item * B<indentString>: default: 25 pixel whitespace image
1.164 bowersj2 941:
1.216 bowersj2 942: A string identifying the indentation string to use.
1.92 bowersj2 943:
1.216 bowersj2 944: =item * B<queryString>: default: empty
1.51 bowersj2 945:
1.174 albertel 946: A string which will be prepended to the query string used when the
1.216 bowersj2 947: folders are opened or closed. You can use this to pass
948: application-specific values.
1.55 bowersj2 949:
1.216 bowersj2 950: =item * B<url>: default: none
1.84 bowersj2 951:
1.174 albertel 952: The url the folders will link to, which should be the current
1.216 bowersj2 953: page. Required if the resource info column is shown, and you
954: are allowing the user to open and close folders.
1.115 bowersj2 955:
1.216 bowersj2 956: =item * B<currentJumpIndex>: default: no jumping
1.55 bowersj2 957:
1.174 albertel 958: Describes the currently-open row number to cause the browser to jump
959: to, because the user just opened that folder. By default, pulled from
960: the Jump information in the ENV{'form.*'}.
1.51 bowersj2 961:
1.216 bowersj2 962: =item * B<printKey>: default: false
1.51 bowersj2 963:
1.174 albertel 964: If true, print the key that appears on the top of the standard
1.216 bowersj2 965: navmaps.
1.139 bowersj2 966:
1.216 bowersj2 967: =item * B<printCloseAll>: default: true
1.140 bowersj2 968:
1.174 albertel 969: If true, print the "Close all folders" or "open all folders"
1.216 bowersj2 970: links.
1.140 bowersj2 971:
1.216 bowersj2 972: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.153 bowersj2 973:
1.174 albertel 974: A function that takes the resource object as its only parameter and
975: returns a true or false value. If true, the resource is displayed. If
1.216 bowersj2 976: false, it is simply skipped in the display.
1.174 albertel 977:
1.216 bowersj2 978: =item * B<suppressEmptySequences>: default: false
1.190 bowersj2 979:
980: If you're using a filter function, and displaying sequences to orient
981: the user, then frequently some sequences will be empty. Setting this to
982: true will cause those sequences not to display, so as not to confuse the
983: user into thinking that if the sequence is there there should be things
1.216 bowersj2 984: under it; for example, see the "Show Uncompleted Homework" view on the
985: B<NAV> screen.
1.190 bowersj2 986:
1.216 bowersj2 987: =item * B<suppressNavmaps>: default: false
1.174 albertel 988:
1.216 bowersj2 989: If true, will not display Navigate Content resources.
1.143 bowersj2 990:
1.133 bowersj2 991: =back
1.51 bowersj2 992:
1.133 bowersj2 993: =head2 Additional Info
1.51 bowersj2 994:
1.174 albertel 995: In addition to the parameters you can pass to the renderer, which will
996: be passed through unchange to the column renderers, the renderer will
997: generate the following information which your renderer may find
998: useful:
999:
1.216 bowersj2 1000: =over 4
1001:
1002: =item * B<counter>:
1.145 bowersj2 1003:
1.216 bowersj2 1004: Contains the number of rows printed. Useful after calling the render
1005: function, as you can detect whether anything was printed at all.
1006:
1007: =item * B<isNewBranch>:
1008:
1009: Useful for renderers: If this resource is currently the first resource
1010: of a new branch, this will be true. The Resource column (leftmost in the
1011: navmaps screen) uses this to display the "new branch" icon
1.59 bowersj2 1012:
1.133 bowersj2 1013: =back
1.59 bowersj2 1014:
1.133 bowersj2 1015: =cut
1.59 bowersj2 1016:
1.133 bowersj2 1017: sub resource { return 0; }
1018: sub communication_status { return 1; }
1019: sub quick_status { return 2; }
1020: sub long_status { return 3; }
1.225 bowersj2 1021: sub part_status_summary { return 4; }
1.51 bowersj2 1022:
1.133 bowersj2 1023: sub render_resource {
1024: my ($resource, $part, $params) = @_;
1.51 bowersj2 1025:
1.133 bowersj2 1026: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 1027:
1.134 bowersj2 1028: my $link = $params->{"resourceLink"};
1029: my $src = $resource->src();
1030: my $it = $params->{"iterator"};
1.133 bowersj2 1031: my $filter = $it->{FILTER};
1032:
1033: my $title = $resource->compTitle();
1.258 albertel 1034:
1.133 bowersj2 1035: my $partLabel = "";
1036: my $newBranchText = "";
1037:
1038: # If this is a new branch, label it so
1039: if ($params->{'isNewBranch'}) {
1040: $newBranchText = "<img src='/adm/lonIcons/branch.gif' border='0' />";
1.51 bowersj2 1041: }
1042:
1.133 bowersj2 1043: # links to open and close the folder
1044: my $linkopen = "<a href='$link'>";
1045: my $linkclose = "</a>";
1.51 bowersj2 1046:
1.204 albertel 1047: # Default icon: unknown page
1048: my $icon = "<img src='/adm/lonIcons/unknown.gif' alt='' border='0' />";
1.133 bowersj2 1049:
1050: if ($resource->is_problem()) {
1.192 bowersj2 1051: if ($part eq '0' || $params->{'condensed'}) {
1.133 bowersj2 1052: $icon = '<img src="/adm/lonIcons/problem.gif" alt="" border="0" />';
1053: } else {
1054: $icon = $params->{'indentString'};
1055: }
1.204 albertel 1056: } else {
1.243 albertel 1057: $icon = "<img src='".&Apache::loncommon::icon($resource->src).
1058: "' alt='' border='0' />";
1.133 bowersj2 1059: }
1.51 bowersj2 1060:
1.133 bowersj2 1061: # Display the correct map icon to open or shut map
1062: if ($resource->is_map()) {
1063: my $mapId = $resource->map_pc();
1064: my $nowOpen = !defined($filter->{$mapId});
1065: if ($it->{CONDITION}) {
1066: $nowOpen = !$nowOpen;
1067: }
1.144 bowersj2 1068:
1.205 bowersj2 1069: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1070:
1.144 bowersj2 1071: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 1072: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.144 bowersj2 1073: $icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";
1074:
1075: $linkopen = "<a href='" . $params->{'url'} . '?' .
1076: $params->{'queryString'} . '&filter=';
1077: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
1078: addToFilter($filter, $mapId) :
1079: removeFromFilter($filter, $mapId);
1080: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
1081: . $params->{'hereType'} . '&here=' .
1082: &Apache::lonnet::escape($params->{'here'}) .
1.159 bowersj2 1083: '&jump=' .
1.144 bowersj2 1084: &Apache::lonnet::escape($resource->symb()) .
1085: "&folderManip=1'>";
1086: } else {
1087: # Don't allow users to manipulate folder
1.205 bowersj2 1088: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
1.144 bowersj2 1089: '.nomanip.gif';
1090: $icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";
1091:
1092: $linkopen = "";
1093: $linkclose = "";
1094: }
1.133 bowersj2 1095: }
1.51 bowersj2 1096:
1.133 bowersj2 1097: if ($resource->randomout()) {
1098: $nonLinkedText .= ' <i>(hidden)</i> ';
1099: }
1100:
1101: # We're done preparing and finally ready to start the rendering
1102: my $result = "<td align='left' valign='center'>";
1.140 bowersj2 1103:
1104: my $indentLevel = $params->{'indentLevel'};
1105: if ($newBranchText) { $indentLevel--; }
1106:
1.133 bowersj2 1107: # print indentation
1.140 bowersj2 1108: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 1109: $result .= $params->{'indentString'};
1.84 bowersj2 1110: }
1111:
1.133 bowersj2 1112: # Decide what to display
1113: $result .= "$newBranchText$linkopen$icon$linkclose";
1114:
1115: my $curMarkerBegin = '';
1116: my $curMarkerEnd = '';
1.51 bowersj2 1117:
1.133 bowersj2 1118: # Is this the current resource?
1.158 bowersj2 1119: if (!$params->{'displayedHereMarker'} &&
1120: $resource->symb() eq $params->{'here'} ) {
1.133 bowersj2 1121: $curMarkerBegin = '<font color="red" size="+2">> </font>';
1122: $curMarkerEnd = '<font color="red" size="+2"><</font>';
1.158 bowersj2 1123: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 1124: }
1125:
1.192 bowersj2 1126: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 1127: !$params->{'condensed'}) {
1.274 matthew 1128: my $displaypart=$resource->part_display($part);
1.245 www 1129: $partLabel = " (Part: $displaypart)";
1130: $link.='#'.&Apache::lonnet::escape($part);
1.133 bowersj2 1131: $title = "";
1.51 bowersj2 1132: }
1133:
1.163 bowersj2 1134: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.133 bowersj2 1135: $nonLinkedText .= ' (' . $resource->countParts() . ' parts)';
1.51 bowersj2 1136: }
1137:
1.268 albertel 1138: my $target;
1139: if ($ENV{'environment.remotenavmap'} eq 'on') {
1140: $target=' target="loncapaclient" ';
1141: }
1.266 raeburn 1142: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.268 albertel 1143: $result .= " $curMarkerBegin<a $target href='$link'>$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
1.144 bowersj2 1144: } else {
1145: $result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
1146: }
1.51 bowersj2 1147:
1.133 bowersj2 1148: return $result;
1149: }
1.51 bowersj2 1150:
1.133 bowersj2 1151: sub render_communication_status {
1152: my ($resource, $part, $params) = @_;
1.134 bowersj2 1153: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1154:
1155: my $link = $params->{"resourceLink"};
1156: my $linkopen = "<a href='$link'>";
1157: my $linkclose = "</a>";
1158:
1159: if ($resource->hasDiscussion()) {
1160: $discussionHTML = $linkopen .
1161: '<img border="0" src="/adm/lonMisc/chat.gif" />' .
1162: $linkclose;
1163: }
1164:
1165: if ($resource->getFeedback()) {
1166: my $feedback = $resource->getFeedback();
1167: foreach (split(/\,/, $feedback)) {
1168: if ($_) {
1169: $feedbackHTML .= ' <a href="/adm/email?display='
1170: . &Apache::lonnet::escape($_) . '">'
1171: . '<img src="/adm/lonMisc/feedback.gif" '
1172: . 'border="0" /></a>';
1173: }
1174: }
1175: }
1176:
1177: if ($resource->getErrors()) {
1178: my $errors = $resource->getErrors();
1.254 matthew 1179: my $errorcount = 0;
1.134 bowersj2 1180: foreach (split(/,/, $errors)) {
1.254 matthew 1181: last if ($errorcount>=10); # Only output 10 bombs maximum
1.134 bowersj2 1182: if ($_) {
1.254 matthew 1183: $errorcount++;
1.134 bowersj2 1184: $errorHTML .= ' <a href="/adm/email?display='
1185: . &Apache::lonnet::escape($_) . '">'
1186: . '<img src="/adm/lonMisc/bomb.gif" '
1187: . 'border="0" /></a>';
1188: }
1189: }
1.197 bowersj2 1190: }
1191:
1192: if ($params->{'multipart'} && $part != '0') {
1193: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 1194: }
1195:
1196: return "<td width=\"75\" align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML$errorHTML </td>";
1197:
1.133 bowersj2 1198: }
1199: sub render_quick_status {
1200: my ($resource, $part, $params) = @_;
1.135 bowersj2 1201: my $result = "";
1202: my $firstDisplayed = !$params->{'condensed'} &&
1203: $params->{'multipart'} && $part eq "0";
1204:
1205: my $link = $params->{"resourceLink"};
1206: my $linkopen = "<a href='$link'>";
1207: my $linkclose = "</a>";
1208:
1209: if ($resource->is_problem() &&
1210: !$firstDisplayed) {
1.224 bowersj2 1211:
1212: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 1213: my $alt = $iconAltTags{$icon};
1214: if ($icon) {
1215: $result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='/adm/lonIcons/$icon' border='0' alt='$alt' />$linkclose</td>\n";
1216: } else {
1217: $result .= "<td width='30'> </td>\n";
1218: }
1219: } else { # not problem, no icon
1220: $result .= "<td width='30'> </td>\n";
1221: }
1222:
1223: return $result;
1.133 bowersj2 1224: }
1225: sub render_long_status {
1226: my ($resource, $part, $params) = @_;
1.136 bowersj2 1227: my $result = "<td align='right' valign='center'>\n";
1228: my $firstDisplayed = !$params->{'condensed'} &&
1229: $params->{'multipart'} && $part eq "0";
1230:
1231: my $color;
1.212 bowersj2 1232: if ($resource->is_problem()) {
1.136 bowersj2 1233: $color = $colormap{$resource->status};
1234:
1.252 matthew 1235: if (dueInLessThan24Hours($resource, $part) ||
1.136 bowersj2 1236: lastTry($resource, $part)) {
1237: $color = $hurryUpColor;
1238: }
1239: }
1240:
1241: if ($resource->kind() eq "res" &&
1242: $resource->is_problem() &&
1243: !$firstDisplayed) {
1244: if ($color) {$result .= "<font color=\"$color\"><b>"; }
1245: $result .= getDescription($resource, $part);
1246: if ($color) {$result .= "</b></font>"; }
1247: }
1248: if ($resource->is_map() && advancedUser() && $resource->randompick()) {
1249: $result .= '(randomly select ' . $resource->randompick() .')';
1250: }
1.210 bowersj2 1251:
1.213 bowersj2 1252: # Debugging code
1253: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1254: # ' - Part: ' . $part;
1255:
1.210 bowersj2 1256: $result .= "</td>\n";
1.136 bowersj2 1257:
1258: return $result;
1.51 bowersj2 1259: }
1260:
1.227 bowersj2 1261: # Colors obtained by taking the icons, matching the colors, and
1262: # possibly reducing the Value (HSV) of the color, if it's too bright
1263: # for text, generally by one third or so.
1.225 bowersj2 1264: my %statusColors =
1265: (
1266: $resObj->CLOSED => '#000000',
1.227 bowersj2 1267: $resObj->OPEN => '#998b13',
1268: $resObj->CORRECT => '#26933f',
1269: $resObj->INCORRECT => '#c48207',
1270: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1271: $resObj->ERROR => '#000000'
1272: );
1273: my %statusStrings =
1274: (
1275: $resObj->CLOSED => 'Not yet open',
1276: $resObj->OPEN => 'Open',
1277: $resObj->CORRECT => 'Correct',
1278: $resObj->INCORRECT => 'Incorrect',
1279: $resObj->ATTEMPTED => 'Attempted',
1280: $resObj->ERROR => 'Network Error'
1281: );
1282: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1283:
1284: use Data::Dumper;
1285: sub render_parts_summary_status {
1286: my ($resource, $part, $params) = @_;
1.256 albertel 1287: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1288: if ($params->{showParts}) {
1289: return '<td></td>';
1290: }
1291:
1292: my $td = "<td align='right'>\n";
1293: my $endtd = "</td>\n";
1.256 albertel 1294: my @probs;
1.225 bowersj2 1295:
1.256 albertel 1296: if ($resource->contains_problem) {
1297: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1298: } else {
1299: @probs=($resource);
1300: }
1301: my $return;
1302: my %overallstatus;
1303: my $totalParts;
1304: foreach my $resource (@probs) {
1305: # If there is a single part, just show the simple status
1306: if ($resource->singlepart()) {
1307: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1308: $overallstatus{$status}++;
1309: $totalParts++;
1310: next;
1311: }
1312: # Now we can be sure the $part doesn't really matter.
1313: my $statusCount = $resource->simpleStatusCount();
1314: my @counts;
1315: foreach my $status (@statuses) {
1316: # decouple display order from the simpleStatusCount order
1317: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1318: if ($statusCount->[$slot]) {
1319: $overallstatus{$status}+=$statusCount->[$slot];
1320: $totalParts+=$statusCount->[$slot];
1321: }
1322: }
1323: }
1324: $return.= $td . $totalParts . ' parts: ';
1325: foreach my $status (@statuses) {
1326: if ($overallstatus{$status}) {
1327: $return.="<font color='" . $statusColors{$status} .
1328: "'>" . $overallstatus{$status} . ' '
1.225 bowersj2 1329: . $statusStrings{$status} . "</font>";
1330: }
1331: }
1.256 albertel 1332: $return.= $endtd;
1333: return $return;
1.225 bowersj2 1334: }
1335:
1.133 bowersj2 1336: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1337: \&render_quick_status, \&render_long_status,
1338: \&render_parts_summary_status);
1.132 bowersj2 1339:
1340: sub setDefault {
1341: my ($val, $default) = @_;
1342: if (!defined($val)) { return $default; }
1343: return $val;
1344: }
1345:
1346: sub render {
1347: my $args = shift;
1.140 bowersj2 1348: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1349: my $result = '';
1350:
1.132 bowersj2 1351: # Configure the renderer.
1352: my $cols = $args->{'cols'};
1353: if (!defined($cols)) {
1354: # no columns, no nav maps.
1355: return '';
1356: }
1.140 bowersj2 1357: my $mustCloseNavMap = 0;
1358: my $navmap;
1359: if (defined($args->{'navmap'})) {
1360: $navmap = $args->{'navmap'};
1361: }
1362:
1.158 bowersj2 1363: my $r = $args->{'r'};
1.140 bowersj2 1364: my $queryString = $args->{'queryString'};
1.159 bowersj2 1365: my $jump = $args->{'jump'};
1.158 bowersj2 1366: my $here = $args->{'here'};
1.153 bowersj2 1367: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1368: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1369: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1370: # before the current resource when using #current
1371:
1372: # If we were passed 'here' information, we are not rendering
1373: # after a folder manipulation, and we were not passed an
1374: # iterator, make sure we open the folders to show the "here"
1375: # marker
1376: my $filterHash = {};
1377: # Figure out what we're not displaying
1378: foreach (split(/\,/, $ENV{"form.filter"})) {
1379: if ($_) {
1380: $filterHash->{$_} = "1";
1381: }
1382: }
1383:
1.191 bowersj2 1384: # Filter: Remember filter function and add our own filter: Refuse
1385: # to show hidden resources unless the user can see them.
1386: my $userCanSeeHidden = advancedUser();
1387: my $filterFunc = setDefault($args->{'filterFunc'},
1388: sub {return 1;});
1389: if (!$userCanSeeHidden) {
1390: # Without renaming the filterfunc, the server seems to go into
1391: # an infinite loop
1392: my $oldFilterFunc = $filterFunc;
1393: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1394: &$oldFilterFunc($res);};
1395: }
1396:
1.140 bowersj2 1397: my $condition = 0;
1398: if ($ENV{'form.condition'}) {
1399: $condition = 1;
1400: }
1401:
1402: if (!$ENV{'form.folderManip'} && !defined($args->{'iterator'})) {
1403: # Step 1: Check to see if we have a navmap
1404: if (!defined($navmap)) {
1.221 bowersj2 1405: $navmap = Apache::lonnavmaps::navmap->new();
1.140 bowersj2 1406: $mustCloseNavMap = 1;
1407: }
1408:
1409: # Step two: Locate what kind of here marker is necessary
1410: # Determine where the "here" marker is and where the screen jumps to.
1411:
1.175 bowersj2 1412: if ($ENV{'form.postsymb'}) {
1413: $here = $jump = $ENV{'form.postsymb'};
1.140 bowersj2 1414: } elsif ($ENV{'form.postdata'}) {
1415: # couldn't find a symb, is there a URL?
1416: my $currenturl = $ENV{'form.postdata'};
1.158 bowersj2 1417: #$currenturl=~s/^http\:\/\///;
1418: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1419:
1.158 bowersj2 1420: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.276 albertel 1421: }
1.158 bowersj2 1422:
1.140 bowersj2 1423: # Step three: Ensure the folders are open
1424: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1425: my $curRes;
1.140 bowersj2 1426: my $found = 0;
1427:
1428: # We only need to do this if we need to open the maps to show the
1429: # current position. This will change the counter so we can't count
1430: # for the jump marker with this loop.
1.222 bowersj2 1431: while (($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1432: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1433: my $mapStack = $mapIterator->getStack();
1434:
1435: # Ensure the parent maps are open
1436: for my $map (@{$mapStack}) {
1437: if ($condition) {
1438: undef $filterHash->{$map->map_pc()};
1439: } else {
1440: $filterHash->{$map->map_pc()} = 1;
1441: }
1442: }
1443: $found = 1;
1444: }
1445: }
1.159 bowersj2 1446: }
1.140 bowersj2 1447:
1448: if ( !defined($args->{'iterator'}) && $ENV{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1449: # If this is a click on a folder or something, we want to preserve the "here"
1450: # from the querystring, and get the new "jump" marker
1451: $here = $ENV{'form.here'};
1452: $jump = $ENV{'form.jump'};
1453: }
1454:
1.132 bowersj2 1455: my $it = $args->{'iterator'};
1456: if (!defined($it)) {
1.140 bowersj2 1457: # Construct a default iterator based on $ENV{'form.'} information
1458:
1459: # Step 1: Check to see if we have a navmap
1460: if (!defined($navmap)) {
1.221 bowersj2 1461: $navmap = Apache::lonnavmaps::navmap->new();
1.140 bowersj2 1462: $mustCloseNavMap = 1;
1463: }
1464:
1.144 bowersj2 1465: # See if we're being passed a specific map
1466: if ($args->{'iterator_map'}) {
1467: my $map = $args->{'iterator_map'};
1.145 bowersj2 1468: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1469: my $firstResource = $map->map_start();
1470: my $finishResource = $map->map_finish();
1471:
1472: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1473: } else {
1474: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);
1475: }
1.132 bowersj2 1476: }
1.256 albertel 1477:
1.159 bowersj2 1478: # (re-)Locate the jump point, if any
1.191 bowersj2 1479: # Note this does not take filtering or hidden into account... need
1480: # to be fixed?
1.159 bowersj2 1481: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1482: my $curRes;
1.159 bowersj2 1483: my $foundJump = 0;
1484: my $counter = 0;
1485:
1.222 bowersj2 1486: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1487: if (ref($curRes)) { $counter++; }
1488:
1489: if (ref($curRes) && $jump eq $curRes->symb()) {
1490:
1491: # This is why we have to use the main iterator instead of the
1492: # potentially faster DFS: The count has to be the same, so
1493: # the order has to be the same, which DFS won't give us.
1494: $args->{'currentJumpIndex'} = $counter;
1495: $foundJump = 1;
1496: }
1497: }
1498:
1.132 bowersj2 1499: my $showParts = setDefault($args->{'showParts'}, 1);
1500: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1501: # keeps track of when the current resource is found,
1502: # so we can back up a few and put the anchor above the
1503: # current resource
1.140 bowersj2 1504: my $printKey = $args->{'printKey'};
1505: my $printCloseAll = $args->{'printCloseAll'};
1506: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.144 bowersj2 1507:
1.140 bowersj2 1508: # Print key?
1509: if ($printKey) {
1510: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1511: my $date=localtime;
1512: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1513: if ($navmap->{LAST_CHECK}) {
1514: $result .=
1.230 www 1515: '<img src="/adm/lonMisc/chat.gif"> '.&mt('New discussion since').' '.
1.140 bowersj2 1516: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1517: '</td><td align="center" valign="bottom"> '.
1.230 www 1518: '<img src="/adm/lonMisc/feedback.gif"> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1519: '</td>';
1520: } else {
1521: $result .= '<td align="center" valign="bottom"> '.
1.230 www 1522: '<img src="/adm/lonMisc/chat.gif"> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1523: ' <img src="/adm/lonMisc/feedback.gif"> '.&mt('New message (click to open)').
1.140 bowersj2 1524: '</td>';
1525: }
1526:
1527: $result .= '</tr></table>';
1528: }
1529:
1.172 bowersj2 1530: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1531: my ($link,$text);
1.140 bowersj2 1532: if ($condition) {
1.281 albertel 1533: $link='"navmaps?condition=0&filter=&'.$queryString.
1534: '&here='.&Apache::lonnet::escape($here).'"';
1535: $text='Close All Folders';
1.140 bowersj2 1536: } else {
1.281 albertel 1537: $link='"navmaps?condition=1&filter=&'.$queryString.
1538: '&here='.&Apache::lonnet::escape($here).'"';
1539: $text='Open All Folders';
1540: }
1541: if ($args->{'caller'} eq 'navmapsdisplay') {
1542: &add_linkitem($args->{'linkitems'},'changefolder',
1543: 'location.href='.$link,$text);
1544: } else {
1545: $result.='<a href='.$link.'>'.&mt($text).'</a>';
1546: }
1.266 raeburn 1547: $result .= "\n";
1548: }
1.140 bowersj2 1549:
1.266 raeburn 1550: # Check for any unread discussions in all resources.
1.281 albertel 1551: if ($args->{'caller'} eq 'navmapsdisplay') {
1.267 albertel 1552: my $totdisc = 0;
1553: my $haveDisc = '';
1554: my @allres=$navmap->retrieveResources();
1555: foreach my $resource (@allres) {
1556: if ($resource->hasDiscussion()) {
1557: my $ressymb;
1558: if ($resource->symb() =~ m-(___adm/\w+/\w+)/(\d+)/bulletinboard$-) {
1559: $ressymb = 'bulletin___'.$2.$1.'/'.$2.'/bulletinboard';
1560: } else {
1561: $ressymb = $resource->symb();
1562: }
1563: $haveDisc .= $ressymb.':';
1564: $totdisc ++;
1565: }
1566: }
1567: if ($totdisc > 0) {
1568: $haveDisc =~ s/:$//;
1.281 albertel 1569: my $navurl = $ENV{'QUERY_STRING'};
1570: &add_linkitem($args->{'linkitems'},'clearbubbles',
1571: 'document.clearbubbles.submit()',
1572: 'Mark all posts read');
1573: $result .= (<<END);
1.267 albertel 1574: <form name="clearbubbles" method="post" action="/adm/feedback">
1575: <input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
1576: <input type="hidden" name="navmaps" value="$haveDisc" />
1577: </form>
1.266 raeburn 1578: END
1.267 albertel 1579: }
1.266 raeburn 1580: }
1.276 albertel 1581:
1.281 albertel 1582: if ($args->{'caller'} eq 'navmapsdisplay') {
1.283 raeburn 1583: $result .= '<table><tr><td>'.
1584: &Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT').'</td>';
1585: if ($ENV{'environment.remotenavmap'} ne 'on') {
1586: $result .= '<td> </td>';
1587: } else {
1588: $result .= '</tr><tr>';
1589: }
1.281 albertel 1590: $result.=&show_linkitems($args->{'linkitems'});
1591: if ($args->{'sort_html'}) {
1592: if ($ENV{'environment.remotenavmap'} ne 'on') {
1593: $result.='<td> </td><td> </td><td> </td>'.
1594: '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
1595: } else {
1596: $result.='</tr><tr><td align="left"><br />'.
1597: $args->{'sort_html'}.'</td></tr>';
1598: }
1599: }
1600: $result .= '</table>';
1601: } elsif ($args->{'sort_html'}) {
1602: $result.=$args->{'sort_html'};
1603: }
1.276 albertel 1604:
1.266 raeburn 1605: $result .= "<br />\n";
1.140 bowersj2 1606: if ($r) {
1607: $r->print($result);
1608: $r->rflush();
1609: $result = "";
1610: }
1.132 bowersj2 1611: # End parameter setting
1.133 bowersj2 1612:
1.132 bowersj2 1613: # Data
1.140 bowersj2 1614: $result .= '<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n";
1.132 bowersj2 1615: my $res = "Apache::lonnavmaps::resource";
1616: my %condenseStatuses =
1617: ( $res->NETWORK_FAILURE => 1,
1618: $res->NOTHING_SET => 1,
1619: $res->CORRECT => 1 );
1620: my @backgroundColors = ("#FFFFFF", "#F6F6F6");
1.133 bowersj2 1621:
1622: # Shared variables
1623: $args->{'counter'} = 0; # counts the rows
1624: $args->{'indentLevel'} = 0;
1625: $args->{'isNewBranch'} = 0;
1626: $args->{'condensed'} = 0;
1627: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='/adm/lonIcons/whitespace1.gif' width='25' height='1' alt='' border='0' />");
1628: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1629:
1.190 bowersj2 1630: # If we're suppressing empty sequences, look for them here. Use DFS for speed,
1631: # since structure actually doesn't matter, except what map has what resources.
1632: if ($args->{'suppressEmptySequences'}) {
1633: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1634: $it->{FIRST_RESOURCE},
1635: $it->{FINISH_RESOURCE},
1636: {}, undef, 1);
1.222 bowersj2 1637: my $depth = 0;
1.190 bowersj2 1638: $dfsit->next();
1639: my $curRes = $dfsit->next();
1640: while ($depth > -1) {
1641: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1642: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1643:
1644: if (ref($curRes)) {
1645: # Parallel pre-processing: Do sequences have non-filtered-out children?
1.201 bowersj2 1646: if ($curRes->is_map()) {
1.190 bowersj2 1647: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1648: # Sequences themselves do not count as visible children,
1649: # unless those sequences also have visible children.
1650: # This means if a sequence appears, there's a "promise"
1651: # that there's something under it if you open it, somewhere.
1652: } else {
1653: # Not a sequence: if it's filtered, ignore it, otherwise
1654: # rise up the stack and mark the sequences as having children
1655: if (&$filterFunc($curRes)) {
1656: for my $sequence (@{$dfsit->getStack()}) {
1657: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1658: }
1659: }
1660: }
1661: }
1662: } continue {
1663: $curRes = $dfsit->next();
1664: }
1665: }
1666:
1.133 bowersj2 1667: my $displayedJumpMarker = 0;
1.132 bowersj2 1668: # Set up iteration.
1669: my $now = time();
1670: my $in24Hours = $now + 24 * 60 * 60;
1671: my $rownum = 0;
1672:
1.141 bowersj2 1673: # export "here" marker information
1674: $args->{'here'} = $here;
1675:
1.222 bowersj2 1676: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1677: my @resources;
1678: my $code='';# sub { !(shift->is_map();) };
1679: if ($args->{'sort'} eq 'title') {
1.276 albertel 1680: my $oldFilterFunc = $filterFunc;
1681: my $filterFunc=
1682: sub {
1683: my ($res)=@_;
1684: if ($res->is_map()) { return 0;}
1685: return &$oldFilterFunc($res);
1686: };
1687: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.270 albertel 1688: @resources= sort {lc($a->compTitle) cmp lc($b->compTitle)} @resources;
1689: } elsif ($args->{'sort'} eq 'duedate') {
1690: @resources=$navmap->retrieveResources(undef,
1691: sub { shift->is_problem(); });
1692: @resources= sort
1693: {
1694: if ($a->duedate ne $b->duedate) {
1695: return $a->duedate cmp $b->duedate;
1696: } else {
1697: lc($a->compTitle) cmp lc($b->compTitle)
1698: }
1699: } @resources;
1.276 albertel 1700: } else {
1701: #unknow sort mechanism or default
1702: undef($args->{'sort'});
1.270 albertel 1703: }
1704:
1.276 albertel 1705:
1.270 albertel 1706: while (1) {
1707: if ($args->{'sort'}) {
1708: $curRes = shift(@resources);
1709: } else {
1710: $curRes = $it->next($closeAllPages);
1711: }
1712: if (!$curRes) { last; }
1713:
1.132 bowersj2 1714: # Maintain indentation level.
1715: if ($curRes == $it->BEGIN_MAP() ||
1716: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1717: $args->{'indentLevel'}++;
1.132 bowersj2 1718: }
1719: if ($curRes == $it->END_MAP() ||
1720: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1721: $args->{'indentLevel'}--;
1.132 bowersj2 1722: }
1723: # Notice new branches
1724: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1725: $args->{'isNewBranch'} = 1;
1726: }
1727:
1728: # If this isn't an actual resource, continue on
1729: if (!ref($curRes)) {
1730: next;
1.132 bowersj2 1731: }
1.133 bowersj2 1732:
1.143 bowersj2 1733: # If this has been filtered out, continue on
1734: if (!(&$filterFunc($curRes))) {
1735: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1736: next;
1737: }
1.132 bowersj2 1738:
1.190 bowersj2 1739: # If this is an empty sequence and we're filtering them, continue on
1.201 bowersj2 1740: if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&
1.190 bowersj2 1741: !$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {
1742: next;
1743: }
1744:
1.153 bowersj2 1745: # If we're suppressing navmaps and this is a navmap, continue on
1746: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1747: next;
1748: }
1749:
1.191 bowersj2 1750: $args->{'counter'}++;
1751:
1.132 bowersj2 1752: # Does it have multiple parts?
1.133 bowersj2 1753: $args->{'multipart'} = 0;
1754: $args->{'condensed'} = 0;
1.132 bowersj2 1755: my @parts;
1756:
1757: # Decide what parts to show.
1.133 bowersj2 1758: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1759: @parts = @{$curRes->parts()};
1.192 bowersj2 1760: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1761:
1762: if ($condenseParts) { # do the condensation
1763: if (!$curRes->opendate("0")) {
1.162 bowersj2 1764: @parts = ();
1.133 bowersj2 1765: $args->{'condensed'} = 1;
1.132 bowersj2 1766: }
1.133 bowersj2 1767: if (!$args->{'condensed'}) {
1.132 bowersj2 1768: # Decide whether to condense based on similarity
1.192 bowersj2 1769: my $status = $curRes->status($parts[0]);
1770: my $due = $curRes->duedate($parts[0]);
1771: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1772: my $statusAllSame = 1;
1773: my $dueAllSame = 1;
1774: my $openAllSame = 1;
1.192 bowersj2 1775: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1776: if ($curRes->status($parts[$i]) != $status){
1777: $statusAllSame = 0;
1778: }
1779: if ($curRes->duedate($parts[$i]) != $due ) {
1780: $dueAllSame = 0;
1781: }
1782: if ($curRes->opendate($parts[$i]) != $open) {
1783: $openAllSame = 0;
1784: }
1785: }
1786: # $*allSame is true if all the statuses were
1787: # the same. Now, if they are all the same and
1788: # match one of the statuses to condense, or they
1789: # are all open with the same due date, or they are
1790: # all OPEN_LATER with the same open date, display the
1791: # status of the first non-zero part (to get the 'correct'
1792: # status right, since 0 is never 'correct' or 'open').
1793: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1794: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1795: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1796: @parts = ($parts[0]);
1.133 bowersj2 1797: $args->{'condensed'} = 1;
1.132 bowersj2 1798: }
1799: }
1.198 bowersj2 1800: # Multipart problem with one part: always "condense" (happens
1801: # to match the desirable behavior)
1802: if ($curRes->countParts() == 1) {
1803: @parts = ($parts[0]);
1804: $args->{'condensed'} = 1;
1805: }
1.132 bowersj2 1806: }
1.157 bowersj2 1807: }
1.132 bowersj2 1808:
1809: # If the multipart problem was condensed, "forget" it was multipart
1810: if (scalar(@parts) == 1) {
1.133 bowersj2 1811: $args->{'multipart'} = 0;
1.192 bowersj2 1812: } else {
1813: # Add part 0 so we display it correctly.
1814: unshift @parts, '0';
1.132 bowersj2 1815: }
1816:
1817: # Now, we've decided what parts to show. Loop through them and
1818: # show them.
1.192 bowersj2 1819: foreach my $part (@parts) {
1.132 bowersj2 1820: $rownum ++;
1821: my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];
1822:
1823: $result .= " <tr bgcolor='$backgroundColor'>\n";
1.134 bowersj2 1824:
1825: # Set up some data about the parts that the cols might want
1826: my $filter = $it->{FILTER};
1.270 albertel 1827: my $src;
1828: if ($args->{'sort'}) {
1829: $src = $curRes->src(); # FIXME this is wrong for .pages
1830: } else {
1831: my $stack = $it->getStack();
1832: $src=getLinkForResource($stack);
1833: }
1.249 www 1834: my $anchor='';
1.270 albertel 1835: if ($src=~s/(\#.*)$//) {
1.249 www 1836: $anchor=$1;
1837: }
1.134 bowersj2 1838: my $srcHasQuestion = $src =~ /\?/;
1839: $args->{"resourceLink"} = $src.
1840: ($srcHasQuestion?'&':'?') .
1.249 www 1841: 'symb=' . &Apache::lonnet::escape($curRes->symb()).
1842: $anchor;
1.270 albertel 1843:
1.132 bowersj2 1844: # Now, display each column.
1845: foreach my $col (@$cols) {
1.139 bowersj2 1846: my $colHTML = '';
1847: if (ref($col)) {
1848: $colHTML .= &$col($curRes, $part, $args);
1849: } else {
1850: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1851: }
1.132 bowersj2 1852:
1.133 bowersj2 1853: # If this is the first column and it's time to print
1854: # the anchor, do so
1855: if ($col == $cols->[0] &&
1856: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1857: $currentJumpDelta) {
1858: # Jam the anchor after the <td> tag;
1859: # necessary for valid HTML (which Mozilla requires)
1860: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1861: $displayedJumpMarker = 1;
1862: }
1.139 bowersj2 1863: $result .= $colHTML . "\n";
1.132 bowersj2 1864: }
1.139 bowersj2 1865: $result .= " </tr>\n";
1.140 bowersj2 1866: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1867: }
1.153 bowersj2 1868:
1.139 bowersj2 1869: if ($r && $rownum % 20 == 0) {
1870: $r->print($result);
1871: $result = "";
1872: $r->rflush();
1.132 bowersj2 1873: }
1.156 bowersj2 1874: } continue {
1.208 bowersj2 1875: if ($r) {
1876: # If we have the connection, make sure the user is still connected
1877: my $c = $r->connection;
1878: if ($c->aborted()) {
1879: # Who cares what we do, nobody will see it anyhow.
1880: return '';
1881: }
1882: }
1.132 bowersj2 1883: }
1884:
1.134 bowersj2 1885: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1886: # delay needed because the browser is processing the jump before
1887: # it finishes rendering, so it goes to the wrong place!
1888: # onload might be better, but this routine has no access to that.
1889: # On mozilla, the 0-millisecond timeout seems to prevent this;
1890: # it's quite likely this might fix other browsers, too, and
1891: # certainly won't hurt anything.
1.139 bowersj2 1892: if ($displayedJumpMarker) {
1.247 albertel 1893: $result .= "
1894: <script>
1895: if (location.href.indexOf('#curloc')==-1) {
1896: setTimeout(\"location += '#curloc';\", 0)
1897: }
1898: </script>";
1.134 bowersj2 1899: }
1900:
1.132 bowersj2 1901: $result .= "</table>";
1.140 bowersj2 1902:
1903: if ($r) {
1904: $r->print($result);
1905: $result = "";
1906: $r->rflush();
1907: }
1908:
1.175 bowersj2 1909: if ($mustCloseNavMap) { $navmap->untieHashes(); }
1.132 bowersj2 1910:
1911: return $result;
1912: }
1913:
1.281 albertel 1914: sub add_linkitem {
1915: my ($linkitems,$name,$cmd,$text)=@_;
1916: $$linkitems{$name}{'cmd'}=$cmd;
1917: $$linkitems{$name}{'text'}=&mt($text);
1918: }
1919:
1920: sub show_linkitems {
1921: my ($linkitems)=@_;
1922: my @linkorder = ("launchnav","closenav","firsthomework","everything",
1923: "uncompleted","changefolder","clearbubbles");
1924:
1925: my $result .= (<<ENDBLOCK);
1.283 raeburn 1926: <td align="left">
1.281 albertel 1927: <script type="text/javascript">
1928: function changeNavDisplay () {
1929: var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
1930: ENDBLOCK
1931: foreach my $link (@linkorder) {
1932: $result.= "if (navchoice == '$link') {".
1933: $linkitems->{$link}{'cmd'}."}\n";
1934: }
1935: $result.='}
1936: </script>
1937: <form name="linkitems" method="post">
1938: <nobr><select name="toplink">'."\n";
1939: foreach my $link (@linkorder) {
1940: if (defined($linkitems->{$link})) {
1941: if ($linkitems->{$link}{'text'} ne '') {
1942: $result .= ' <option value="'.$link.'">'.
1943: $linkitems->{$link}{'text'}."</option>\n";
1944: }
1945: }
1946: }
1947: $result .= '</select> <input type="button" name="chgnav"
1948: value="Go" onClick="javascript:changeNavDisplay()" />
1949: </nobr></form></td>'."\n";
1950: return $result;
1951: }
1952:
1.133 bowersj2 1953: 1;
1954:
1955: package Apache::lonnavmaps::navmap;
1956:
1957: =pod
1958:
1.216 bowersj2 1959: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 1960:
1.217 bowersj2 1961: =head2 Overview
1.133 bowersj2 1962:
1.217 bowersj2 1963: The navmap object's job is to provide access to the resources
1964: in the course as Apache::lonnavmaps::resource objects, and to
1965: query and manage the relationship between those resource objects.
1966:
1967: Generally, you'll use the navmap object in one of three basic ways.
1968: In order of increasing complexity and power:
1969:
1970: =over 4
1971:
1972: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb>, B<Url> or B<MapPc>. This provides
1973: various ways to obtain resource objects, based on various identifiers.
1974: Use this when you want to request information about one object or
1975: a handful of resources you already know the identities of, from some
1976: other source. For more about Ids, Symbs, and MapPcs, see the
1977: Resource documentation. Note that Url should be a B<last resort>,
1978: not your first choice; it only works when there is only one
1979: instance of the resource in the course, which only applies to
1980: maps, and even that may change in the future.
1981:
1982: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
1983: retrieves resources matching some criterion and returns them
1984: in a flat array, with no structure information. Use this when
1985: you are manipulating a series of resources, based on what map
1986: the are in, but do not care about branching, or exactly how
1987: the maps and resources are related. This is the most common case.
1988:
1989: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
1990: the course's navmap in various ways without writing the traversal
1991: code yourself. See iterator documentation below. Use this when
1992: you need to know absolutely everything about the course, including
1993: branches and the precise relationship between maps and resources.
1994:
1995: =back
1996:
1997: =head2 Creation And Destruction
1998:
1999: To create a navmap object, use the following function:
1.133 bowersj2 2000:
2001: =over 4
2002:
1.221 bowersj2 2003: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 2004:
1.221 bowersj2 2005: Creates a new navmap object. Returns the navmap object if this is
2006: successful, or B<undef> if not.
1.174 albertel 2007:
1.216 bowersj2 2008: =back
2009:
1.217 bowersj2 2010: When you are done with the $navmap object, you I<must> call
2011: $navmap->untieHashes(), or you'll prevent the current user from using that
2012: course until the web server is restarted. (!)
2013:
1.216 bowersj2 2014: =head2 Methods
2015:
2016: =over 4
2017:
1.174 albertel 2018: =item * B<getIterator>(first, finish, filter, condition):
2019:
2020: See iterator documentation below.
1.133 bowersj2 2021:
2022: =cut
2023:
2024: use strict;
2025: use GDBM_File;
2026:
2027: sub new {
2028: # magic invocation to create a class instance
2029: my $proto = shift;
2030: my $class = ref($proto) || $proto;
2031: my $self = {};
2032:
2033: # Resource cache stores navmap resources as we reference them. We generate
2034: # them on-demand so we don't pay for creating resources unless we use them.
2035: $self->{RESOURCE_CACHE} = {};
2036:
2037: # Network failure flag, if we accessed the course or user opt and
2038: # failed
2039: $self->{NETWORK_FAILURE} = 0;
2040:
2041: # tie the nav hash
2042:
1.168 bowersj2 2043: my %navmaphash;
2044: my %parmhash;
1.220 bowersj2 2045: my $courseFn = $ENV{"request.course.fn"};
2046: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
1.133 bowersj2 2047: &GDBM_READER(), 0640))) {
2048: return undef;
2049: }
2050:
1.220 bowersj2 2051: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
1.133 bowersj2 2052: &GDBM_READER(), 0640)))
2053: {
1.170 matthew 2054: untie %{$self->{PARM_HASH}};
1.133 bowersj2 2055: return undef;
2056: }
2057:
1.199 bowersj2 2058: $self->{NAV_HASH} = \%navmaphash;
1.168 bowersj2 2059: $self->{PARM_HASH} = \%parmhash;
1.221 bowersj2 2060: $self->{PARM_CACHE} = {};
1.133 bowersj2 2061:
2062: bless($self);
2063:
2064: return $self;
2065: }
2066:
1.221 bowersj2 2067: sub generate_course_user_opt {
1.133 bowersj2 2068: my $self = shift;
1.221 bowersj2 2069: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 2070:
1.221 bowersj2 2071: my $uname=$ENV{'user.name'};
2072: my $udom=$ENV{'user.domain'};
2073: my $uhome=$ENV{'user.home'};
2074: my $cid=$ENV{'request.course.id'};
2075: my $chome=$ENV{'course.'.$cid.'.home'};
2076: my ($cdom,$cnum)=split(/\_/,$cid);
2077:
2078: my $userprefix=$uname.'_'.$udom.'_';
2079:
2080: my %courserdatas; my %useropt; my %courseopt; my %userrdatas;
2081: unless ($uhome eq 'no_host') {
1.133 bowersj2 2082: # ------------------------------------------------- Get coursedata (if present)
1.221 bowersj2 2083: unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
2084: my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
2085: ':resourcedata',$chome);
2086: # Check for network failure
2087: if ( $reply =~ /no.such.host/i || $reply =~ /con_lost/i) {
2088: $self->{NETWORK_FAILURE} = 1;
2089: } elsif ($reply!~/^error\:/) {
2090: $courserdatas{$cid}=$reply;
2091: $courserdatas{$cid.'.last_cache'}=time;
2092: }
2093: }
2094: foreach (split(/\&/,$courserdatas{$cid})) {
2095: my ($name,$value)=split(/\=/,$_);
2096: $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
2097: &Apache::lonnet::unescape($value);
2098: }
1.133 bowersj2 2099: # --------------------------------------------------- Get userdata (if present)
1.221 bowersj2 2100: unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
2101: my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
2102: if ($reply!~/^error\:/) {
2103: $userrdatas{$uname.'___'.$udom}=$reply;
2104: $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
2105: }
2106: # check to see if network failed
2107: elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
2108: {
2109: $self->{NETWORK_FAILURE} = 1;
2110: }
2111: }
2112: foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
2113: my ($name,$value)=split(/\=/,$_);
2114: $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
2115: &Apache::lonnet::unescape($value);
2116: }
2117: $self->{COURSE_OPT} = \%courseopt;
2118: $self->{USER_OPT} = \%useropt;
2119: }
2120:
2121: $self->{COURSE_USER_OPT_GENERATED} = 1;
2122:
2123: return;
2124: }
2125:
2126: sub generate_email_discuss_status {
2127: my $self = shift;
1.259 raeburn 2128: my $symb = shift;
1.221 bowersj2 2129: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 2130:
1.221 bowersj2 2131: my $cid=$ENV{'request.course.id'};
2132: my ($cdom,$cnum)=split(/\_/,$cid);
2133:
2134: my %emailstatus = &Apache::lonnet::dump('email_status');
2135: my $logoutTime = $emailstatus{'logout'};
2136: my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
2137: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2138: $courseLeaveTime : $logoutTime);
2139: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2140: $cdom, $cnum);
1.259 raeburn 2141: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
2142: $ENV{'user.domain'},$ENV{'user.name'},'lastread');
2143: my %lastreadtime = ();
2144: foreach (keys %lastread) {
2145: my $key = $_;
2146: $key =~ s/_lastread$//;
2147: $lastreadtime{$key} = $lastread{$_};
2148: }
2149:
1.221 bowersj2 2150: my %feedback=();
2151: my %error=();
2152: my $keys = &Apache::lonnet::reply('keys:'.
2153: $ENV{'user.domain'}.':'.
2154: $ENV{'user.name'}.':nohist_email',
2155: $ENV{'user.home'});
2156:
2157: foreach my $msgid (split(/\&/, $keys)) {
2158: $msgid=&Apache::lonnet::unescape($msgid);
2159: my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
2160: if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
2161: my ($what,$url)=($1,$2);
2162: my %status=
2163: &Apache::lonnet::get('email_status',[$msgid]);
2164: if ($status{$msgid}=~/^error\:/) {
2165: $status{$msgid}='';
2166: }
2167:
2168: if (($status{$msgid} eq 'new') ||
2169: (!$status{$msgid})) {
2170: if ($what eq 'Error') {
2171: $error{$url}.=','.$msgid;
2172: } else {
2173: $feedback{$url}.=','.$msgid;
2174: }
2175: }
2176: }
1.211 bowersj2 2177: }
1.221 bowersj2 2178:
2179: $self->{FEEDBACK} = \%feedback;
2180: $self->{ERROR_MSG} = \%error; # what is this? JB
2181: $self->{DISCUSSION_TIME} = \%discussiontime;
2182: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 2183: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 2184:
2185: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2186: }
2187:
2188: sub get_user_data {
2189: my $self = shift;
2190: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 2191:
1.221 bowersj2 2192: # Retrieve performance data on problems
2193: my %student_data = Apache::lonnet::currentdump($ENV{'request.course.id'},
2194: $ENV{'user.domain'},
2195: $ENV{'user.name'});
2196: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 2197:
1.221 bowersj2 2198: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 2199: }
2200:
2201: # Internal function: Takes a key to look up in the nav hash and implements internal
2202: # memory caching of that key.
2203: sub navhash {
2204: my $self = shift; my $key = shift;
2205: return $self->{NAV_HASH}->{$key};
2206: }
2207:
1.217 bowersj2 2208: =pod
2209:
2210: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2211: false otherwise. Undefined course maps indicate an error somewhere in
2212: LON-CAPA, and you will not be able to proceed with using the navmap.
2213: See the B<NAV> screen for an example of using this.
2214:
2215: =cut
2216:
1.133 bowersj2 2217: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2218: sub courseMapDefined {
2219: my $self = shift;
2220: my $uri = &Apache::lonnet::clutter($ENV{'request.course.uri'});
2221:
2222: my $firstres = $self->navhash("map_start_$uri");
2223: my $lastres = $self->navhash("map_finish_$uri");
2224: return $firstres && $lastres;
2225: }
2226:
2227: sub getIterator {
2228: my $self = shift;
2229: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
2230: shift, undef, shift);
2231: return $iterator;
2232: }
2233:
2234: # unties the hash when done
2235: sub untieHashes {
1.168 bowersj2 2236: my $self = shift;
1.170 matthew 2237: untie %{$self->{NAV_HASH}};
2238: untie %{$self->{PARM_HASH}};
1.133 bowersj2 2239: }
2240:
2241: # Private method: Does the given resource (as a symb string) have
2242: # current discussion? Returns 0 if chat/mail data not extracted.
2243: sub hasDiscussion {
2244: my $self = shift;
2245: my $symb = shift;
1.221 bowersj2 2246:
2247: $self->generate_email_discuss_status();
2248:
1.133 bowersj2 2249: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2250:
2251: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2252:
2253: # backward compatibility (bulletin boards used to be 'wrapped')
2254: my $ressymb = $symb;
2255: if ($ressymb =~ m|adm/(\w+)/(\w+)/(\d+)/bulletinboard$|) {
1.266 raeburn 2256: unless ($ressymb =~ m|adm/wrapper/adm|) {
1.259 raeburn 2257: $ressymb = 'bulletin___'.$3.'___adm/wrapper/adm/'.$1.'/'.$2.'/'.$3.'/bulletinboard';
2258: }
2259: }
2260:
2261: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2262: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2263: } else {
1.266 raeburn 2264: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2265: 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 2266: }
1.133 bowersj2 2267: }
2268:
2269: # Private method: Does the given resource (as a symb string) have
2270: # current feedback? Returns the string in the feedback hash, which
2271: # will be false if it does not exist.
2272: sub getFeedback {
2273: my $self = shift;
2274: my $symb = shift;
2275:
1.221 bowersj2 2276: $self->generate_email_discuss_status();
2277:
1.133 bowersj2 2278: if (!defined($self->{FEEDBACK})) { return ""; }
2279:
2280: return $self->{FEEDBACK}->{$symb};
2281: }
2282:
2283: # Private method: Get the errors for that resource (by source).
2284: sub getErrors {
2285: my $self = shift;
2286: my $src = shift;
1.221 bowersj2 2287:
2288: $self->generate_email_discuss_status();
2289:
1.133 bowersj2 2290: if (!defined($self->{ERROR_MSG})) { return ""; }
2291: return $self->{ERROR_MSG}->{$src};
2292: }
2293:
2294: =pod
2295:
1.174 albertel 2296: =item * B<getById>(id):
2297:
2298: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2299: object for that resource. This method, or other methods that use it
2300: (as in the resource object) is the only proper way to obtain a
2301: resource object.
1.133 bowersj2 2302:
1.194 bowersj2 2303: =item * B<getBySymb>(symb):
2304:
2305: Based on the symb of the resource, get a resource object for that
2306: resource. This is one of the proper ways to get a resource object.
2307:
2308: =item * B<getMapByMapPc>(map_pc):
2309:
2310: Based on the map_pc of the resource, get a resource object for
2311: the given map. This is one of the proper ways to get a resource object.
2312:
1.133 bowersj2 2313: =cut
2314:
2315: # The strategy here is to cache the resource objects, and only construct them
2316: # as we use them. The real point is to prevent reading any more from the tied
2317: # hash then we have to, which should hopefully alleviate speed problems.
2318:
2319: sub getById {
2320: my $self = shift;
2321: my $id = shift;
2322:
2323: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2324: {
2325: return $self->{RESOURCE_CACHE}->{$id};
2326: }
2327:
2328: # resource handles inserting itself into cache.
2329: # Not clear why the quotes are necessary, but as of this
2330: # writing it doesn't work without them.
2331: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2332: }
1.133 bowersj2 2333:
1.172 bowersj2 2334: sub getBySymb {
2335: my $self = shift;
2336: my $symb = shift;
1.277 matthew 2337:
1.228 albertel 2338: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2339: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2340: my $returnvalue = undef;
2341: if (ref($map)) {
2342: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2343: }
2344: return $returnvalue;
1.194 bowersj2 2345: }
2346:
2347: sub getByMapPc {
2348: my $self = shift;
2349: my $map_pc = shift;
2350: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2351: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2352: return $self->getById($map_id);
1.172 bowersj2 2353: }
2354:
1.133 bowersj2 2355: =pod
2356:
1.174 albertel 2357: =item * B<firstResource>():
2358:
2359: Returns a resource object reference corresponding to the first
2360: resource in the navmap.
1.133 bowersj2 2361:
2362: =cut
2363:
2364: sub firstResource {
2365: my $self = shift;
2366: my $firstResource = $self->navhash('map_start_' .
2367: &Apache::lonnet::clutter($ENV{'request.course.uri'}));
2368: return $self->getById($firstResource);
1.132 bowersj2 2369: }
1.133 bowersj2 2370:
2371: =pod
2372:
1.174 albertel 2373: =item * B<finishResource>():
2374:
2375: Returns a resource object reference corresponding to the last resource
2376: in the navmap.
1.133 bowersj2 2377:
2378: =cut
2379:
2380: sub finishResource {
2381: my $self = shift;
2382: my $firstResource = $self->navhash('map_finish_' .
2383: &Apache::lonnet::clutter($ENV{'request.course.uri'}));
2384: return $self->getById($firstResource);
1.132 bowersj2 2385: }
1.133 bowersj2 2386:
2387: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2388: # the actual lookup; parmval caches the results.
2389: sub parmval {
2390: my $self = shift;
2391: my ($what,$symb)=@_;
2392: my $hashkey = $what."|||".$symb;
2393:
2394: if (defined($self->{PARM_CACHE}->{$hashkey})) {
2395: return $self->{PARM_CACHE}->{$hashkey};
2396: }
2397:
2398: my $result = $self->parmval_real($what, $symb);
2399: $self->{PARM_CACHE}->{$hashkey} = $result;
2400: return $result;
1.132 bowersj2 2401: }
2402:
1.133 bowersj2 2403: sub parmval_real {
2404: my $self = shift;
1.219 albertel 2405: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2406:
1.221 bowersj2 2407: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2408: $self->generate_course_user_opt();
2409:
1.133 bowersj2 2410: my $cid=$ENV{'request.course.id'};
2411: my $csec=$ENV{'request.course.sec'};
2412: my $uname=$ENV{'user.name'};
2413: my $udom=$ENV{'user.domain'};
2414:
2415: unless ($symb) { return ''; }
2416: my $result='';
2417:
1.226 www 2418: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.133 bowersj2 2419:
2420: # ----------------------------------------------------- Cascading lookup scheme
2421: my $rwhat=$what;
2422: $what=~s/^parameter\_//;
2423: $what=~s/\_/\./;
2424:
2425: my $symbparm=$symb.'.'.$what;
2426: my $mapparm=$mapname.'___(all).'.$what;
2427: my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;
2428:
2429: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2430: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2431: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2432:
2433: my $courselevel= $usercourseprefix.'.'.$what;
2434: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2435: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2436:
2437: my $useropt = $self->{USER_OPT};
2438: my $courseopt = $self->{COURSE_OPT};
2439: my $parmhash = $self->{PARM_HASH};
2440:
2441: # ---------------------------------------------------------- first, check user
2442: if ($uname and defined($useropt)) {
2443: if (defined($$useropt{$courselevelr})) { return $$useropt{$courselevelr}; }
2444: if (defined($$useropt{$courselevelm})) { return $$useropt{$courselevelm}; }
2445: if (defined($$useropt{$courselevel})) { return $$useropt{$courselevel}; }
2446: }
2447:
2448: # ------------------------------------------------------- second, check course
2449: if ($csec and defined($courseopt)) {
2450: if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
2451: if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
2452: if (defined($$courseopt{$seclevel})) { return $$courseopt{$seclevel}; }
2453: }
2454:
2455: if (defined($courseopt)) {
2456: if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
2457: if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
2458: if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
2459: }
2460:
2461: # ----------------------------------------------------- third, check map parms
2462:
2463: my $thisparm=$$parmhash{$symbparm};
2464: if (defined($thisparm)) { return $thisparm; }
2465:
2466: # ----------------------------------------------------- fourth , check default
2467:
1.246 albertel 2468: my $meta_rwhat=$rwhat;
2469: $meta_rwhat=~s/\./_/g;
2470: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
2471: if (defined($default)) { return $default}
2472: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.133 bowersj2 2473: if (defined($default)) { return $default}
2474:
2475: # --------------------------------------------------- fifth , cascade up parts
2476:
2477: my ($space,@qualifier)=split(/\./,$rwhat);
2478: my $qualifier=join('.',@qualifier);
2479: unless ($space eq '0') {
1.160 albertel 2480: my @parts=split(/_/,$space);
2481: my $id=pop(@parts);
2482: my $part=join('_',@parts);
2483: if ($part eq '') { $part='0'; }
1.219 albertel 2484: my $partgeneral=$self->parmval($part.".$qualifier",$symb,1);
1.160 albertel 2485: if (defined($partgeneral)) { return $partgeneral; }
1.133 bowersj2 2486: }
1.219 albertel 2487: if ($recurse) { return undef; }
2488: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);
2489: if (defined($pack_def)) { return $pack_def; }
1.133 bowersj2 2490: return '';
1.145 bowersj2 2491: }
2492:
1.174 albertel 2493: =pod
1.145 bowersj2 2494:
1.174 albertel 2495: =item * B<getResourceByUrl>(url):
1.145 bowersj2 2496:
1.174 albertel 2497: Retrieves a resource object by URL of the resource. If passed a
2498: resource object, it will simply return it, so it is safe to use this
2499: method in code like "$res = $navmap->getResourceByUrl($res)", if
2500: you're not sure if $res is already an object, or just a URL. If the
2501: resource appears multiple times in the course, only the first instance
2502: will be returned. As a result, this is probably useful only for maps.
2503:
2504: =item * B<retrieveResources>(map, filterFunc, recursive, bailout):
2505:
2506: The map is a specification of a map to retreive the resources from,
2507: either as a url or as an object. The filterFunc is a reference to a
2508: function that takes a resource object as its one argument and returns
2509: true if the resource should be included, or false if it should not
2510: be. If recursive is true, the map will be recursively examined,
2511: otherwise it will not be. If bailout is true, the function will return
2512: as soon as it finds a resource, if false it will finish. By default,
2513: the map is the top-level map of the course, filterFunc is a function
2514: that always returns 1, recursive is true, bailout is false. The
2515: resources will be returned in a list containing the resource objects
2516: for the corresponding resources, with B<no structure information> in
2517: the list; regardless of branching, recursion, etc., it will be a flat
2518: list.
2519:
2520: Thus, this is suitable for cases where you don't want the structure,
2521: just a list of all resources. It is also suitable for finding out how
2522: many resources match a given description; for this use, if all you
2523: want to know is if I<any> resources match the description, the bailout
2524: parameter will allow you to avoid potentially expensive enumeration of
2525: all matching resources.
1.145 bowersj2 2526:
1.256 albertel 2527: =item * B<hasResource>(map, filterFunc, recursive):
1.145 bowersj2 2528:
1.174 albertel 2529: Convience method for
1.146 bowersj2 2530:
2531: scalar(retrieveResources($map, $filterFunc, $recursive, 1)) > 0
2532:
1.174 albertel 2533: which will tell whether the map has resources matching the description
2534: in the filter function.
1.146 bowersj2 2535:
1.145 bowersj2 2536: =cut
2537:
1.277 matthew 2538:
1.145 bowersj2 2539: sub getResourceByUrl {
2540: my $self = shift;
2541: my $resUrl = shift;
2542:
2543: if (ref($resUrl)) { return $resUrl; }
2544:
2545: $resUrl = &Apache::lonnet::clutter($resUrl);
2546: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
2547: if ($resId =~ /,/) {
2548: $resId = (split (/,/, $resId))[0];
2549: }
2550: if (!$resId) { return ''; }
2551: return $self->getById($resId);
2552: }
2553:
2554: sub retrieveResources {
2555: my $self = shift;
2556: my $map = shift;
2557: my $filterFunc = shift;
2558: if (!defined ($filterFunc)) {
2559: $filterFunc = sub {return 1;};
2560: }
2561: my $recursive = shift;
2562: if (!defined($recursive)) { $recursive = 1; }
2563: my $bailout = shift;
2564: if (!defined($bailout)) { $bailout = 0; }
2565:
2566: # Create the necessary iterator.
2567: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 2568: $map = $self->getResourceByUrl($map);
1.145 bowersj2 2569: }
2570:
1.213 bowersj2 2571: # If nothing was passed, assume top-level map
2572: if (!$map) {
2573: $map = $self->getById('0.0');
2574: }
2575:
1.145 bowersj2 2576: # Check the map's validity.
1.213 bowersj2 2577: if (!$map->is_map()) {
1.145 bowersj2 2578: # Oh, to throw an exception.... how I'd love that!
2579: return ();
2580: }
2581:
1.146 bowersj2 2582: # Get an iterator.
2583: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.215 bowersj2 2584: undef, $recursive);
1.146 bowersj2 2585:
2586: my @resources = ();
2587:
2588: # Run down the iterator and collect the resources.
1.222 bowersj2 2589: my $curRes;
2590:
2591: while ($curRes = $it->next()) {
1.146 bowersj2 2592: if (ref($curRes)) {
2593: if (!&$filterFunc($curRes)) {
2594: next;
2595: }
2596:
2597: push @resources, $curRes;
2598:
2599: if ($bailout) {
2600: return @resources;
2601: }
2602: }
2603:
2604: }
2605:
2606: return @resources;
2607: }
2608:
2609: sub hasResource {
2610: my $self = shift;
2611: my $map = shift;
2612: my $filterFunc = shift;
2613: my $recursive = shift;
2614:
2615: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1)) > 0;
1.133 bowersj2 2616: }
1.51 bowersj2 2617:
2618: 1;
2619:
2620: package Apache::lonnavmaps::iterator;
2621:
2622: =pod
2623:
2624: =back
2625:
1.174 albertel 2626: =head1 Object: navmap Iterator
1.51 bowersj2 2627:
1.174 albertel 2628: An I<iterator> encapsulates the logic required to traverse a data
2629: structure. navmap uses an iterator to traverse the course map
2630: according to the criteria you wish to use.
2631:
2632: To obtain an iterator, call the B<getIterator>() function of a
2633: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
2634: directly.) This will return a reference to the iterator:
1.51 bowersj2 2635:
2636: C<my $resourceIterator = $navmap-E<gt>getIterator();>
2637:
2638: To get the next thing from the iterator, call B<next>:
2639:
2640: C<my $nextThing = $resourceIterator-E<gt>next()>
2641:
2642: getIterator behaves as follows:
2643:
2644: =over 4
2645:
1.174 albertel 2646: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
2647:
2648: All parameters are optional. firstResource is a resource reference
2649: corresponding to where the iterator should start. It defaults to
2650: navmap->firstResource() for the corresponding nav map. finishResource
2651: corresponds to where you want the iterator to end, defaulting to
2652: navmap->finishResource(). filterHash is a hash used as a set
2653: containing strings representing the resource IDs, defaulting to
2654: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 2655: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 2656: recursed on. If it is a 1, only resources NOT in the filterHash will
2657: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
2658: false (default), the iterator will only return the first level of map
2659: that is not just a single, 'redirecting' map. If true, the iterator
2660: will return all information, starting with the top-level map,
2661: regardless of content. returnTopMap, if true (default false), will
2662: cause the iterator to return the top-level map object (resource 0.0)
2663: before anything else.
2664:
2665: Thus, by default, only top-level resources will be shown. Change the
2666: condition to a 1 without changing the hash, and all resources will be
2667: shown. Changing the condition to 1 and including some values in the
2668: hash will allow you to selectively suppress parts of the navmap, while
2669: leaving it on 0 and adding things to the hash will allow you to
2670: selectively add parts of the nav map. See the handler code for
2671: examples.
2672:
2673: The iterator will return either a reference to a resource object, or a
2674: token representing something in the map, such as the beginning of a
2675: new branch. The possible tokens are:
2676:
2677: =over 4
1.51 bowersj2 2678:
1.222 bowersj2 2679: =item * B<END_ITERATOR>:
2680:
2681: The iterator has returned all that it's going to. Further calls to the
2682: iterator will just produce more of these. This is a "false" value, and
2683: is the only false value the iterator which will be returned, so it can
2684: be used as a loop sentinel.
2685:
1.217 bowersj2 2686: =item * B<BEGIN_MAP>:
1.51 bowersj2 2687:
1.174 albertel 2688: A new map is being recursed into. This is returned I<after> the map
2689: resource itself is returned.
1.51 bowersj2 2690:
1.217 bowersj2 2691: =item * B<END_MAP>:
1.174 albertel 2692:
2693: The map is now done.
1.51 bowersj2 2694:
1.217 bowersj2 2695: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 2696:
1.174 albertel 2697: A branch is now starting. The next resource returned will be the first
2698: in that branch.
1.70 bowersj2 2699:
1.217 bowersj2 2700: =item * B<END_BRANCH>:
1.70 bowersj2 2701:
1.174 albertel 2702: The branch is now done.
1.51 bowersj2 2703:
2704: =back
2705:
1.174 albertel 2706: The tokens are retreivable via methods on the iterator object, i.e.,
2707: $iterator->END_MAP.
1.70 bowersj2 2708:
1.174 albertel 2709: Maps can contain empty resources. The iterator will automatically skip
2710: over such resources, but will still treat the structure
2711: correctly. Thus, a complicated map with several branches, but
2712: consisting entirely of empty resources except for one beginning or
2713: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
2714: but only one resource will be returned.
1.116 bowersj2 2715:
1.242 matthew 2716: =back
2717:
1.222 bowersj2 2718: =head2 Normal Usage
2719:
2720: Normal usage of the iterator object is to do the following:
2721:
2722: my $it = $navmap->getIterator([your params here]);
2723: my $curRes;
2724: while ($curRes = $it->next()) {
2725: [your logic here]
2726: }
2727:
2728: Note that inside of the loop, it's frequently useful to check if
2729: "$curRes" is a reference or not with the reference function; only
2730: resource objects will be references, and any non-references will
2731: be the tokens described above.
2732:
2733: Also note there is some old code floating around that trys to track
2734: the depth of the iterator to see when it's done; do not copy that
2735: code. It is difficult to get right and harder to understand then
2736: this. They should be migrated to this new style.
1.51 bowersj2 2737:
2738: =cut
2739:
2740: # Here are the tokens for the iterator:
2741:
1.222 bowersj2 2742: sub END_ITERATOR { return 0; }
1.51 bowersj2 2743: sub BEGIN_MAP { return 1; } # begining of a new map
2744: sub END_MAP { return 2; } # end of the map
2745: sub BEGIN_BRANCH { return 3; } # beginning of a branch
2746: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 2747: sub FORWARD { return 1; } # go forward
2748: sub BACKWARD { return 2; }
1.51 bowersj2 2749:
1.96 bowersj2 2750: sub min {
2751: (my $a, my $b) = @_;
2752: if ($a < $b) { return $a; } else { return $b; }
2753: }
2754:
1.94 bowersj2 2755: sub new {
2756: # magic invocation to create a class instance
2757: my $proto = shift;
2758: my $class = ref($proto) || $proto;
2759: my $self = {};
2760:
2761: $self->{NAV_MAP} = shift;
2762: return undef unless ($self->{NAV_MAP});
2763:
2764: # Handle the parameters
2765: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
2766: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
2767:
2768: # If the given resources are just the ID of the resource, get the
2769: # objects
2770: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
2771: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
2772: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
2773: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
2774:
2775: $self->{FILTER} = shift;
2776:
2777: # A hash, used as a set, of resource already seen
2778: $self->{ALREADY_SEEN} = shift;
2779: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
2780: $self->{CONDITION} = shift;
2781:
1.116 bowersj2 2782: # Do we want to automatically follow "redirection" maps?
2783: $self->{FORCE_TOP} = shift;
2784:
1.162 bowersj2 2785: # Do we want to return the top-level map object (resource 0.0)?
2786: $self->{RETURN_0} = shift;
2787: # have we done that yet?
2788: $self->{HAVE_RETURNED_0} = 0;
2789:
1.94 bowersj2 2790: # Now, we need to pre-process the map, by walking forward and backward
2791: # over the parts of the map we're going to look at.
1.96 bowersj2 2792:
1.97 bowersj2 2793: # The processing steps are exactly the same, except for a few small
2794: # changes, so I bundle those up in the following list of two elements:
2795: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
2796: # first_resource).
2797: # This prevents writing nearly-identical code twice.
2798: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
2799: 'FIRST_RESOURCE'],
2800: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
2801: 'FINISH_RESOURCE'] );
2802:
1.98 bowersj2 2803: my $maxDepth = 0; # tracks max depth
2804:
1.116 bowersj2 2805: # If there is only one resource in this map, and it's a map, we
2806: # want to remember that, so the user can ask for the first map
2807: # that isn't just a redirector.
2808: my $resource; my $resourceCount = 0;
2809:
1.209 bowersj2 2810: # Documentation on this algorithm can be found in the CVS repository at
2811: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
2812: # in that file.
1.107 bowersj2 2813: # **1**
2814:
1.97 bowersj2 2815: foreach my $pass (@iterations) {
2816: my $direction = $pass->[0];
2817: my $valName = $pass->[1];
2818: my $nextResourceMethod = $pass->[2];
2819: my $firstResourceName = $pass->[3];
2820:
2821: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
2822: $self->{FIRST_RESOURCE},
2823: $self->{FINISH_RESOURCE},
2824: {}, undef, 0, $direction);
1.96 bowersj2 2825:
1.97 bowersj2 2826: # prime the recursion
2827: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 2828: $iterator->next();
1.97 bowersj2 2829: my $curRes = $iterator->next();
1.222 bowersj2 2830: my $depth = 1;
2831: while ($depth > 0) {
2832: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
2833: if ($curRes == $iterator->END_MAP()) { $depth--; }
2834:
1.97 bowersj2 2835: if (ref($curRes)) {
1.116 bowersj2 2836: # If there's only one resource, this will save it
1.117 bowersj2 2837: # we have to filter empty resources from consideration here,
2838: # or even "empty", redirecting maps have two (start & finish)
2839: # or three (start, finish, plus redirector)
2840: if($direction == FORWARD && $curRes->src()) {
2841: $resource = $curRes; $resourceCount++;
2842: }
1.97 bowersj2 2843: my $resultingVal = $curRes->{DATA}->{$valName};
2844: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 2845: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 2846:
1.116 bowersj2 2847: if ($nextCount == 1) { # **3**
1.97 bowersj2 2848: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
2849: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
2850: }
2851:
1.116 bowersj2 2852: if ($nextCount > 1) { # **4**
1.97 bowersj2 2853: foreach my $res (@{$nextResources}) {
2854: my $current = $res->{DATA}->{$valName} || 999999999;
2855: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
2856: }
2857: }
2858: }
1.96 bowersj2 2859:
1.107 bowersj2 2860: # Assign the final val (**2**)
1.97 bowersj2 2861: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 2862: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
2863: $curRes->{DATA}->{BOT_UP_VAL});
2864:
2865: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
2866: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 2867: }
1.222 bowersj2 2868:
2869: $curRes = $iterator->next();
1.96 bowersj2 2870: }
2871: }
1.94 bowersj2 2872:
1.116 bowersj2 2873: # Check: Was this only one resource, a map?
1.255 albertel 2874: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 2875: my $firstResource = $resource->map_start();
2876: my $finishResource = $resource->map_finish();
2877: return
2878: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
2879: $finishResource, $self->{FILTER},
2880: $self->{ALREADY_SEEN},
2881: $self->{CONDITION}, 0);
2882:
2883: }
2884:
1.98 bowersj2 2885: # Set up some bookkeeping information.
2886: $self->{CURRENT_DEPTH} = 0;
2887: $self->{MAX_DEPTH} = $maxDepth;
2888: $self->{STACK} = [];
2889: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 2890: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 2891:
2892: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
2893: push @{$self->{STACK}}, [];
2894: }
2895:
1.107 bowersj2 2896: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 2897: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
2898: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
2899:
2900: bless ($self);
2901:
2902: return $self;
2903: }
2904:
2905: sub next {
2906: my $self = shift;
1.256 albertel 2907: my $closeAllPages=shift;
1.222 bowersj2 2908: if ($self->{FINISHED}) {
2909: return END_ITERATOR();
2910: }
2911:
1.162 bowersj2 2912: # If we want to return the top-level map object, and haven't yet,
2913: # do so.
2914: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
2915: $self->{HAVE_RETURNED_0} = 1;
2916: return $self->{NAV_MAP}->getById('0.0');
2917: }
1.98 bowersj2 2918:
2919: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2920: # grab the next from the recursive iterator
1.256 albertel 2921: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 2922:
2923: # is it a begin or end map? If so, update the depth
2924: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
2925: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
2926:
2927: # Are we back at depth 0? If so, stop recursing
2928: if ($self->{RECURSIVE_DEPTH} == 0) {
2929: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
2930: }
2931:
2932: return $next;
2933: }
2934:
2935: if (defined($self->{FORCE_NEXT})) {
2936: my $tmp = $self->{FORCE_NEXT};
2937: $self->{FORCE_NEXT} = undef;
2938: return $tmp;
2939: }
2940:
2941: # Have we not yet begun? If not, return BEGIN_MAP and
2942: # remember we've started.
2943: if ( !$self->{STARTED} ) {
2944: $self->{STARTED} = 1;
2945: return $self->BEGIN_MAP();
2946: }
2947:
2948: # Here's the guts of the iterator.
2949:
2950: # Find the next resource, if any.
2951: my $found = 0;
2952: my $i = $self->{MAX_DEPTH};
2953: my $newDepth;
2954: my $here;
2955: while ( $i >= 0 && !$found ) {
1.107 bowersj2 2956: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
2957: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 2958: $found = 1;
2959: $newDepth = $i;
2960: }
2961: $i--;
2962: }
2963:
2964: # If we still didn't find anything, we're done.
2965: if ( !$found ) {
2966: # We need to get back down to the correct branch depth
2967: if ( $self->{CURRENT_DEPTH} > 0 ) {
2968: $self->{CURRENT_DEPTH}--;
2969: return END_BRANCH();
2970: } else {
1.222 bowersj2 2971: $self->{FINISHED} = 1;
1.98 bowersj2 2972: return END_MAP();
2973: }
2974: }
2975:
1.104 bowersj2 2976: # If this is not a resource, it must be an END_BRANCH marker we want
2977: # to return directly.
1.107 bowersj2 2978: if (!ref($here)) { # **8**
1.104 bowersj2 2979: if ($here == END_BRANCH()) { # paranoia, in case of later extension
2980: $self->{CURRENT_DEPTH}--;
2981: return $here;
2982: }
2983: }
2984:
2985: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
2986: $self->{HERE} = $here;
2987:
1.98 bowersj2 2988: # Get to the right level
2989: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
2990: push @{$self->{STACK}->[$newDepth]}, $here;
2991: $self->{CURRENT_DEPTH}--;
2992: return END_BRANCH();
2993: }
2994: if ( $self->{CURRENT_DEPTH} < $newDepth) {
2995: push @{$self->{STACK}->[$newDepth]}, $here;
2996: $self->{CURRENT_DEPTH}++;
2997: return BEGIN_BRANCH();
2998: }
2999:
3000: # If we made it here, we have the next resource, and we're at the
3001: # right branch level. So let's examine the resource for where
3002: # we can get to from here.
3003:
3004: # So we need to look at all the resources we can get to from here,
3005: # categorize them if we haven't seen them, remember if we have a new
3006: my $nextUnfiltered = $here->getNext();
1.104 bowersj2 3007: my $maxDepthAdded = -1;
3008:
1.98 bowersj2 3009: for (@$nextUnfiltered) {
3010: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 3011: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3012: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 3013: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 3014: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 3015: }
3016: }
1.104 bowersj2 3017:
3018: # Is this the end of a branch? If so, all of the resources examined above
3019: # led to lower levels then the one we are currently at, so we push a END_BRANCH
3020: # marker onto the stack so we don't forget.
3021: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3022: # BC branch and gets to C, it will see F as the only next resource, but it's
3023: # one level lower. Thus, this is the end of the branch, since there are no
3024: # more resources added to this level or above.
1.111 bowersj2 3025: # We don't do this if the examined resource is the finish resource,
3026: # because the condition given above is true, but the "END_MAP" will
3027: # take care of things and we should already be at depth 0.
1.104 bowersj2 3028: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3029: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3030: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3031: }
3032:
1.98 bowersj2 3033: # That ends the main iterator logic. Now, do we want to recurse
3034: # down this map (if this resource is a map)?
1.256 albertel 3035: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3036: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3037: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3038: my $firstResource = $self->{HERE}->map_start();
3039: my $finishResource = $self->{HERE}->map_finish();
3040:
3041: $self->{RECURSIVE_ITERATOR} =
3042: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3043: $finishResource, $self->{FILTER},
3044: $self->{ALREADY_SEEN}, $self->{CONDITION});
3045: }
3046:
1.116 bowersj2 3047: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3048: # Should you ever find you need it, make sure to add an option to the code
3049: # that you can use; other things depend on this behavior.
1.138 bowersj2 3050: my $browsePriv = $self->{HERE}->browsePriv();
3051: if (!$self->{HERE}->src() ||
3052: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3053: return $self->next($closeAllPages);
1.116 bowersj2 3054: }
3055:
1.98 bowersj2 3056: return $self->{HERE};
3057:
3058: }
3059:
3060: =pod
3061:
1.174 albertel 3062: The other method available on the iterator is B<getStack>, which
3063: returns an array populated with the current 'stack' of maps, as
3064: references to the resource objects. Example: This is useful when
3065: making the navigation map, as we need to check whether we are under a
3066: page map to see if we need to link directly to the resource, or to the
3067: page. The first elements in the array will correspond to the top of
3068: the stack (most inclusive map).
1.98 bowersj2 3069:
3070: =cut
3071:
3072: sub getStack {
3073: my $self=shift;
3074:
3075: my @stack;
3076:
3077: $self->populateStack(\@stack);
3078:
3079: return \@stack;
3080: }
3081:
3082: # Private method: Calls the iterators recursively to populate the stack.
3083: sub populateStack {
3084: my $self=shift;
3085: my $stack = shift;
3086:
3087: push @$stack, $self->{HERE} if ($self->{HERE});
3088:
3089: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3090: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3091: }
1.94 bowersj2 3092: }
3093:
3094: 1;
3095:
3096: package Apache::lonnavmaps::DFSiterator;
3097:
1.100 bowersj2 3098: # Not documented in the perldoc: This is a simple iterator that just walks
3099: # through the nav map and presents the resources in a depth-first search
3100: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3101: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3102: # useful for pre-processing of some kind, and is in fact used by the main
3103: # iterator that way, but that's about it.
3104: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3105: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3106: # use might be found for it. - Jeremy
1.94 bowersj2 3107:
1.117 bowersj2 3108: # Unlike the main iterator, this DOES return all resources, even blank ones.
3109: # The main iterator needs them to correctly preprocess the map.
3110:
1.94 bowersj2 3111: sub BEGIN_MAP { return 1; } # begining of a new map
3112: sub END_MAP { return 2; } # end of the map
3113: sub FORWARD { return 1; } # go forward
3114: sub BACKWARD { return 2; }
3115:
1.100 bowersj2 3116: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3117: # filter hash ref (or undef), already seen hash or undef, condition
3118: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3119: sub new {
3120: # magic invocation to create a class instance
3121: my $proto = shift;
3122: my $class = ref($proto) || $proto;
3123: my $self = {};
3124:
3125: $self->{NAV_MAP} = shift;
3126: return undef unless ($self->{NAV_MAP});
3127:
3128: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3129: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3130:
3131: # If the given resources are just the ID of the resource, get the
3132: # objects
3133: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3134: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3135: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3136: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3137:
3138: $self->{FILTER} = shift;
3139:
3140: # A hash, used as a set, of resource already seen
3141: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3142: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3143: $self->{CONDITION} = shift;
1.89 bowersj2 3144: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3145:
1.100 bowersj2 3146: # Flag: Have we started yet?
1.51 bowersj2 3147: $self->{STARTED} = 0;
3148:
3149: # Should we continue calling the recursive iterator, if any?
3150: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3151: # The recursive iterator, if any
3152: $self->{RECURSIVE_ITERATOR} = undef;
3153: # Are we recursing on a map, or a branch?
3154: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3155: # And the count of how deep it is, so that this iterator can keep track of
3156: # when to pick back up again.
3157: $self->{RECURSIVE_DEPTH} = 0;
3158:
3159: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3160: $self->{STACK} = [];
1.51 bowersj2 3161:
3162: # Start with the first resource
1.89 bowersj2 3163: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3164: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3165: } else {
1.100 bowersj2 3166: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3167: }
1.51 bowersj2 3168:
3169: bless($self);
3170: return $self;
3171: }
3172:
3173: sub next {
3174: my $self = shift;
3175:
3176: # Are we using a recursive iterator? If so, pull from that and
3177: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3178: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3179: # grab the next from the recursive iterator
3180: my $next = $self->{RECURSIVE_ITERATOR}->next();
3181:
3182: # is it a begin or end map? Update depth if so
3183: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3184: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3185:
3186: # Are we back at depth 0? If so, stop recursing.
3187: if ($self->{RECURSIVE_DEPTH} == 0) {
3188: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3189: }
3190:
3191: return $next;
3192: }
3193:
3194: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3195: # END_MAP, which will end the iterator.
3196: if (scalar(@{$self->{STACK}}) == 0) {
3197: return $self->END_MAP();
1.51 bowersj2 3198: }
3199:
3200: # Have we not yet begun? If not, return BEGIN_MAP and
3201: # remember that we've started.
3202: if ( !$self->{STARTED} ) {
3203: $self->{STARTED} = 1;
3204: return $self->BEGIN_MAP;
3205: }
3206:
3207: # Get the next resource in the branch
1.100 bowersj2 3208: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3209:
1.100 bowersj2 3210: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3211: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3212:
3213: # Get the next possible resources
1.90 bowersj2 3214: my $nextUnfiltered;
1.89 bowersj2 3215: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3216: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3217: } else {
1.90 bowersj2 3218: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3219: }
1.51 bowersj2 3220: my $next = [];
3221:
3222: # filter the next possibilities to remove things we've
1.100 bowersj2 3223: # already seen.
1.51 bowersj2 3224: foreach (@$nextUnfiltered) {
1.52 bowersj2 3225: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
3226: push @$next, $_;
3227: }
1.51 bowersj2 3228: }
3229:
3230: while (@$next) {
1.100 bowersj2 3231: # copy the next possibilities over to the stack
3232: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3233: }
3234:
3235: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3236: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3237: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3238: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3239: my $firstResource = $self->{HERE}->map_start();
3240: my $finishResource = $self->{HERE}->map_finish();
3241:
3242: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3243: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3244: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3245: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3246: }
3247:
3248: return $self->{HERE};
1.190 bowersj2 3249: }
3250:
3251: # Identical to the full iterator methods of the same name. Hate to copy/paste
3252: # but I also hate to "inherit" either iterator from the other.
3253:
3254: sub getStack {
3255: my $self=shift;
3256:
3257: my @stack;
3258:
3259: $self->populateStack(\@stack);
3260:
3261: return \@stack;
3262: }
3263:
3264: # Private method: Calls the iterators recursively to populate the stack.
3265: sub populateStack {
3266: my $self=shift;
3267: my $stack = shift;
3268:
3269: push @$stack, $self->{HERE} if ($self->{HERE});
3270:
3271: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3272: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3273: }
1.51 bowersj2 3274: }
3275:
1.1 www 3276: 1;
1.2 www 3277:
1.51 bowersj2 3278: package Apache::lonnavmaps::resource;
3279:
3280: use Apache::lonnet;
3281:
3282: =pod
3283:
1.217 bowersj2 3284: =head1 Object: resource
1.51 bowersj2 3285:
1.217 bowersj2 3286: X<resource, navmap object>
1.174 albertel 3287: A resource object encapsulates a resource in a resource map, allowing
3288: easy manipulation of the resource, querying the properties of the
3289: resource (including user properties), and represents a reference that
3290: can be used as the canonical representation of the resource by
3291: lonnavmap clients like renderers.
3292:
3293: A resource only makes sense in the context of a navmap, as some of the
3294: data is stored in the navmap object.
3295:
3296: You will probably never need to instantiate this object directly. Use
3297: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3298: starting resource.
1.51 bowersj2 3299:
1.188 bowersj2 3300: Resource objects respect the parameter_hiddenparts, which suppresses
3301: various parts according to the wishes of the map author. As of this
3302: writing, there is no way to override this parameter, and suppressed
3303: parts will never be returned, nor will their response types or ids be
3304: stored.
3305:
1.217 bowersj2 3306: =head2 Overview
1.51 bowersj2 3307:
1.217 bowersj2 3308: A B<Resource> is the most granular type of object in LON-CAPA that can
3309: be included in a course. It can either be a particular resource, like
3310: an HTML page, external resource, problem, etc., or it can be a
3311: container sequence, such as a "page" or a "map".
3312:
3313: To see a sequence from the user's point of view, please see the
3314: B<Creating a Course: Maps and Sequences> chapter of the Author's
3315: Manual.
3316:
3317: A Resource Object, once obtained from a navmap object via a B<getBy*>
3318: method of the navmap, or from an iterator, allows you to query
3319: information about that resource.
3320:
3321: Generally, you do not ever want to create a resource object yourself,
3322: so creation has been left undocumented. Always retrieve resources
3323: from navmap objects.
3324:
3325: =head3 Identifying Resources
3326:
3327: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3328: unique to that resource for a given course. X<resource ID, in big hash>
3329: The Resource ID has the form #.#, where the first number is the same
3330: for every resource in a map, and the second is unique. For instance,
3331: for a course laid out like this:
3332:
3333: * Problem 1
3334: * Map
3335: * Resource 2
3336: * Resource 3
3337:
3338: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3339: C<Resource 3> will share a first number. The second number may end up
3340: re-used between the two groups.
3341:
3342: The resource ID is only used in the big hash, but can be used in the
3343: context of a course to identify a resource easily. (For instance, the
3344: printing system uses it to record which resources from a sequence you
3345: wish to print.)
3346:
3347: X<symb> X<resource, symb>
3348: All resources also have B<symb>s, which uniquely identify a resource
3349: in a course. Many internal LON-CAPA functions expect a symb. A symb
3350: carries along with it the URL of the resource, and the map it appears
3351: in. Symbs are much larger then resource IDs.
1.51 bowersj2 3352:
3353: =cut
3354:
3355: sub new {
3356: # magic invocation to create a class instance
3357: my $proto = shift;
3358: my $class = ref($proto) || $proto;
3359: my $self = {};
3360:
3361: $self->{NAV_MAP} = shift;
3362: $self->{ID} = shift;
3363:
3364: # Store this new resource in the parent nav map's cache.
3365: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 3366: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 3367:
3368: # A hash that can be used by two-pass algorithms to store data
3369: # about this resource in. Not used by the resource object
3370: # directly.
3371: $self->{DATA} = {};
3372:
3373: bless($self);
3374:
3375: return $self;
3376: }
3377:
1.70 bowersj2 3378: # private function: simplify the NAV_HASH lookups we keep doing
3379: # pass the name, and to automatically append my ID, pass a true val on the
3380: # second param
3381: sub navHash {
3382: my $self = shift;
3383: my $param = shift;
3384: my $id = shift;
1.115 bowersj2 3385: return $self->{NAV_MAP}->navhash($param . ($id?$self->{ID}:""));
1.70 bowersj2 3386: }
3387:
1.51 bowersj2 3388: =pod
3389:
1.217 bowersj2 3390: =head2 Methods
1.70 bowersj2 3391:
1.217 bowersj2 3392: Once you have a resource object, here's what you can do with it:
3393:
3394: =head3 Attribute Retrieval
3395:
3396: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 3397:
3398: =over 4
3399:
1.217 bowersj2 3400: =item * B<ID>: Every resource has an ID that is unique for that
3401: resource in the course it is in. The ID is actually in the hash
3402: representing the resource, so for a resource object $res, obtain
3403: it via C<$res->{ID}).
3404:
1.174 albertel 3405: =item * B<compTitle>:
3406:
3407: Returns a "composite title", that is equal to $res->title() if the
3408: resource has a title, and is otherwise the last part of the URL (e.g.,
3409: "problem.problem").
3410:
3411: =item * B<ext>:
3412:
3413: Returns true if the resource is external.
3414:
3415: =item * B<kind>:
3416:
3417: Returns the kind of the resource from the compiled nav map.
3418:
3419: =item * B<randomout>:
1.106 bowersj2 3420:
1.174 albertel 3421: Returns true if this resource was chosen to NOT be shown to the user
3422: by the random map selection feature. In other words, this is usually
3423: false.
1.70 bowersj2 3424:
1.174 albertel 3425: =item * B<randompick>:
1.70 bowersj2 3426:
1.174 albertel 3427: Returns true for a map if the randompick feature is being used on the
3428: map. (?)
1.70 bowersj2 3429:
1.174 albertel 3430: =item * B<src>:
1.51 bowersj2 3431:
1.174 albertel 3432: Returns the source for the resource.
1.70 bowersj2 3433:
1.174 albertel 3434: =item * B<symb>:
1.70 bowersj2 3435:
1.174 albertel 3436: Returns the symb for the resource.
1.70 bowersj2 3437:
1.174 albertel 3438: =item * B<title>:
1.70 bowersj2 3439:
1.174 albertel 3440: Returns the title of the resource.
3441:
1.51 bowersj2 3442: =back
3443:
3444: =cut
3445:
3446: # These info functions can be used directly, as they don't return
3447: # resource information.
1.85 bowersj2 3448: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.70 bowersj2 3449: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 3450: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 3451: # considered private and undocumented
1.51 bowersj2 3452: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
3453: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 3454: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
3455: sub randompick {
3456: my $self = shift;
3457: return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .
3458: '.0.parameter_randompick'};
3459: }
1.51 bowersj2 3460: sub src {
3461: my $self=shift;
3462: return $self->navHash("src_", 1);
3463: }
3464: sub symb {
3465: my $self=shift;
3466: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3467: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 3468: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 3469: . '___' . $second . '___' . $symbSrc;
1.223 albertel 3470: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 3471: }
1.213 bowersj2 3472: sub title {
3473: my $self=shift;
3474: if ($self->{ID} eq '0.0') {
3475: # If this is the top-level map, return the title of the course
3476: # since this map can not be titled otherwise.
3477: return $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
3478: }
3479: return $self->navHash("title_", 1); }
1.217 bowersj2 3480: # considered private and undocumented
1.70 bowersj2 3481: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.106 bowersj2 3482: sub compTitle {
3483: my $self = shift;
3484: my $title = $self->title();
1.176 www 3485: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 3486: if (!$title) {
3487: $title = $self->src();
3488: $title = substr($title, rindex($title, '/') + 1);
3489: }
3490: return $title;
3491: }
1.70 bowersj2 3492: =pod
3493:
3494: B<Predicate Testing the Resource>
3495:
3496: These methods are shortcuts to deciding if a given resource has a given property.
3497:
3498: =over 4
3499:
1.174 albertel 3500: =item * B<is_map>:
3501:
3502: Returns true if the resource is a map type.
3503:
3504: =item * B<is_problem>:
1.70 bowersj2 3505:
1.174 albertel 3506: Returns true if the resource is a problem type, false
3507: otherwise. (Looks at the extension on the src field; might need more
3508: to work correctly.)
1.70 bowersj2 3509:
1.174 albertel 3510: =item * B<is_page>:
1.70 bowersj2 3511:
1.174 albertel 3512: Returns true if the resource is a page.
3513:
3514: =item * B<is_sequence>:
3515:
3516: Returns true if the resource is a sequence.
1.70 bowersj2 3517:
3518: =back
3519:
3520: =cut
3521:
1.256 albertel 3522: sub hasResource {
3523: my $self = shift;
3524: return $self->{NAV_MAP}->hasResource(@_);
3525: }
3526:
3527: sub retrieveResources {
3528: my $self = shift;
3529: return $self->{NAV_MAP}->retrieveResources(@_);
3530: }
1.70 bowersj2 3531:
3532: sub is_html {
1.51 bowersj2 3533: my $self=shift;
3534: my $src = $self->src();
1.70 bowersj2 3535: return ($src =~ /html$/);
1.51 bowersj2 3536: }
1.70 bowersj2 3537: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
3538: sub is_page {
1.51 bowersj2 3539: my $self=shift;
3540: my $src = $self->src();
1.205 bowersj2 3541: return $self->navHash("is_map_", 1) &&
3542: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 3543: }
1.70 bowersj2 3544: sub is_problem {
1.51 bowersj2 3545: my $self=shift;
3546: my $src = $self->src();
1.256 albertel 3547: return ($src =~ /\.(problem|exam|quiz|assess|survey|form|library)$/)
3548: }
3549: sub contains_problem {
3550: my $self=shift;
3551: if ($self->is_page()) {
3552: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
3553: return $hasProblem;
3554: }
3555: return 0;
1.51 bowersj2 3556: }
1.70 bowersj2 3557: sub is_sequence {
1.51 bowersj2 3558: my $self=shift;
3559: my $src = $self->src();
1.205 bowersj2 3560: return $self->navHash("is_map_", 1) &&
3561: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 3562: }
1.261 matthew 3563: sub is_survey {
3564: my $self = shift();
3565: my $part = shift();
1.263 albertel 3566: if ($self->parmval('type',$part) eq 'survey') {
1.261 matthew 3567: return 1;
3568: }
1.263 albertel 3569: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 3570: return 1;
3571: }
3572: return 0;
3573: }
1.51 bowersj2 3574:
1.266 raeburn 3575: sub is_empty_sequence {
3576: my $self=shift;
3577: my $src = $self->src();
3578: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
3579: }
3580:
1.101 bowersj2 3581: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 3582: sub parmval {
3583: my $self = shift;
3584: my $what = shift;
1.185 bowersj2 3585: my $part = shift;
3586: if (!defined($part)) {
3587: $part = '0';
3588: }
1.51 bowersj2 3589: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
3590: }
3591:
1.70 bowersj2 3592: =pod
3593:
3594: B<Map Methods>
3595:
1.174 albertel 3596: These methods are useful for getting information about the map
3597: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 3598:
3599: =over 4
3600:
1.174 albertel 3601: =item * B<map_finish>:
3602:
3603: Returns a reference to a resource object corresponding to the finish
3604: resource of the map.
1.70 bowersj2 3605:
1.174 albertel 3606: =item * B<map_pc>:
1.70 bowersj2 3607:
1.174 albertel 3608: Returns the pc value of the map, which is the first number that
3609: appears in the resource ID of the resources in the map, and is the
3610: number that appears around the middle of the symbs of the resources in
3611: that map.
1.70 bowersj2 3612:
1.174 albertel 3613: =item * B<map_start>:
3614:
3615: Returns a reference to a resource object corresponding to the start
3616: resource of the map.
3617:
3618: =item * B<map_type>:
3619:
3620: Returns a string with the type of the map in it.
1.70 bowersj2 3621:
3622: =back
1.51 bowersj2 3623:
1.70 bowersj2 3624: =cut
1.51 bowersj2 3625:
3626: sub map_finish {
3627: my $self = shift;
3628: my $src = $self->src();
1.144 bowersj2 3629: $src = Apache::lonnet::clutter($src);
1.51 bowersj2 3630: my $res = $self->navHash("map_finish_$src", 0);
3631: $res = $self->{NAV_MAP}->getById($res);
3632: return $res;
3633: }
1.70 bowersj2 3634: sub map_pc {
3635: my $self = shift;
3636: my $src = $self->src();
3637: return $self->navHash("map_pc_$src", 0);
3638: }
1.51 bowersj2 3639: sub map_start {
3640: my $self = shift;
3641: my $src = $self->src();
1.144 bowersj2 3642: $src = Apache::lonnet::clutter($src);
1.51 bowersj2 3643: my $res = $self->navHash("map_start_$src", 0);
3644: $res = $self->{NAV_MAP}->getById($res);
3645: return $res;
3646: }
3647: sub map_type {
3648: my $self = shift;
3649: my $pc = $self->map_pc();
3650: return $self->navHash("map_type_$pc", 0);
3651: }
3652:
3653: #####
3654: # Property queries
3655: #####
3656:
3657: # These functions will be responsible for returning the CORRECT
3658: # VALUE for the parameter, no matter what. So while they may look
3659: # like direct calls to parmval, they can be more then that.
3660: # So, for instance, the duedate function should use the "duedatetype"
3661: # information, rather then the resource object user.
3662:
3663: =pod
3664:
3665: =head2 Resource Parameters
3666:
1.174 albertel 3667: In order to use the resource parameters correctly, the nav map must
3668: have been instantiated with genCourseAndUserOptions set to true, so
3669: the courseopt and useropt is read correctly. Then, you can call these
3670: functions to get the relevant parameters for the resource. Each
3671: function defaults to part "0", but can be directed to another part by
3672: passing the part as the parameter.
3673:
3674: These methods are responsible for getting the parameter correct, not
3675: merely reflecting the contents of the GDBM hashes. As we move towards
3676: dates relative to other dates, these methods should be updated to
3677: reflect that. (Then, anybody using these methods will not have to update
3678: their code.)
3679:
3680: =over 4
3681:
3682: =item * B<acc>:
3683:
3684: Get the Client IP/Name Access Control information.
1.51 bowersj2 3685:
1.174 albertel 3686: =item * B<answerdate>:
1.51 bowersj2 3687:
1.174 albertel 3688: Get the answer-reveal date for the problem.
3689:
1.211 bowersj2 3690: =item * B<awarded>:
3691:
3692: Gets the awarded value for the problem part. Requires genUserData set to
3693: true when the navmap object was created.
3694:
1.174 albertel 3695: =item * B<duedate>:
3696:
3697: Get the due date for the problem.
3698:
3699: =item * B<tries>:
3700:
3701: Get the number of tries the student has used on the problem.
3702:
3703: =item * B<maxtries>:
3704:
3705: Get the number of max tries allowed.
3706:
3707: =item * B<opendate>:
1.51 bowersj2 3708:
1.174 albertel 3709: Get the open date for the problem.
1.51 bowersj2 3710:
1.174 albertel 3711: =item * B<sig>:
1.51 bowersj2 3712:
1.174 albertel 3713: Get the significant figures setting.
1.51 bowersj2 3714:
1.174 albertel 3715: =item * B<tol>:
1.51 bowersj2 3716:
1.174 albertel 3717: Get the tolerance for the problem.
1.51 bowersj2 3718:
1.174 albertel 3719: =item * B<tries>:
1.51 bowersj2 3720:
1.174 albertel 3721: Get the number of tries the user has already used on the problem.
1.51 bowersj2 3722:
1.174 albertel 3723: =item * B<type>:
1.51 bowersj2 3724:
1.174 albertel 3725: Get the question type for the problem.
1.70 bowersj2 3726:
1.174 albertel 3727: =item * B<weight>:
1.51 bowersj2 3728:
1.174 albertel 3729: Get the weight for the problem.
1.51 bowersj2 3730:
3731: =back
3732:
3733: =cut
3734:
3735: sub acc {
3736: (my $self, my $part) = @_;
3737: return $self->parmval("acc", $part);
3738: }
3739: sub answerdate {
3740: (my $self, my $part) = @_;
3741: # Handle intervals
3742: if ($self->parmval("answerdate.type", $part) eq 'date_interval') {
3743: return $self->duedate($part) +
3744: $self->parmval("answerdate", $part);
3745: }
3746: return $self->parmval("answerdate", $part);
1.106 bowersj2 3747: }
1.211 bowersj2 3748: sub awarded {
3749: my $self = shift; my $part = shift;
1.221 bowersj2 3750: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 3751: if (!defined($part)) { $part = '0'; }
3752: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
3753: }
1.51 bowersj2 3754: sub duedate {
3755: (my $self, my $part) = @_;
1.260 albertel 3756: my $interval=$self->parmval("interval", $part);
3757: if ($interval) {
3758: my $first_access=&Apache::lonnet::get_first_access('map',$self->symb);
3759: if ($first_access) { return ($first_access+$interval); }
3760: }
1.51 bowersj2 3761: return $self->parmval("duedate", $part);
3762: }
3763: sub maxtries {
3764: (my $self, my $part) = @_;
3765: return $self->parmval("maxtries", $part);
3766: }
3767: sub opendate {
3768: (my $self, my $part) = @_;
3769: if ($self->parmval("opendate.type", $part) eq 'date_interval') {
3770: return $self->duedate($part) -
3771: $self->parmval("opendate", $part);
3772: }
3773: return $self->parmval("opendate");
3774: }
1.185 bowersj2 3775: sub problemstatus {
3776: (my $self, my $part) = @_;
1.236 bowersj2 3777: return lc $self->parmval("problemstatus", $part);
1.185 bowersj2 3778: }
1.51 bowersj2 3779: sub sig {
3780: (my $self, my $part) = @_;
3781: return $self->parmval("sig", $part);
3782: }
3783: sub tol {
3784: (my $self, my $part) = @_;
3785: return $self->parmval("tol", $part);
3786: }
1.108 bowersj2 3787: sub tries {
3788: my $self = shift;
3789: my $tries = $self->queryRestoreHash('tries', shift);
3790: if (!defined($tries)) { return '0';}
1.51 bowersj2 3791: return $tries;
3792: }
1.70 bowersj2 3793: sub type {
3794: (my $self, my $part) = @_;
3795: return $self->parmval("type", $part);
3796: }
1.109 bowersj2 3797: sub weight {
3798: my $self = shift; my $part = shift;
1.211 bowersj2 3799: if (!defined($part)) { $part = '0'; }
3800: return &Apache::lonnet::EXT('resource.'.$part.'.weight',
3801: $self->symb(), $ENV{'user.domain'},
3802: $ENV{'user.name'},
3803: $ENV{'request.course.sec'});
1.274 matthew 3804: }
3805: sub part_display {
3806: my $self= shift(); my $partID = shift();
3807: if (! defined($partID)) { $partID = '0'; }
3808: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
3809: $self->symb);
3810: if (! defined($display) || $display eq '') {
3811: $display = $partID;
3812: }
3813: return $display;
1.70 bowersj2 3814: }
1.51 bowersj2 3815:
3816: # Multiple things need this
3817: sub getReturnHash {
3818: my $self = shift;
3819:
3820: if (!defined($self->{RETURN_HASH})) {
1.84 bowersj2 3821: my %tmpHash = &Apache::lonnet::restore($self->symb());
1.51 bowersj2 3822: $self->{RETURN_HASH} = \%tmpHash;
3823: }
3824: }
3825:
3826: ######
3827: # Status queries
3828: ######
3829:
3830: # These methods query the status of problems.
3831:
3832: # If we need to count parts, this function determines the number of
3833: # parts from the metadata. When called, it returns a reference to a list
3834: # of strings corresponding to the parts. (Thus, using it in a scalar context
3835: # tells you how many parts you have in the problem:
3836: # $partcount = scalar($resource->countParts());
3837: # Don't use $self->{PARTS} directly because you don't know if it's been
3838: # computed yet.
3839:
3840: =pod
3841:
3842: =head2 Resource misc
3843:
3844: Misc. functions for the resource.
3845:
3846: =over 4
3847:
1.174 albertel 3848: =item * B<hasDiscussion>:
1.59 bowersj2 3849:
1.174 albertel 3850: Returns a false value if there has been discussion since the user last
3851: logged in, true if there has. Always returns false if the discussion
3852: data was not extracted when the nav map was constructed.
3853:
3854: =item * B<getFeedback>:
3855:
3856: Gets the feedback for the resource and returns the raw feedback string
3857: for the resource, or the null string if there is no feedback or the
3858: email data was not extracted when the nav map was constructed. Usually
3859: used like this:
1.59 bowersj2 3860:
3861: for (split(/\,/, $res->getFeedback())) {
3862: my $link = &Apache::lonnet::escape($_);
3863: ...
3864:
3865: and use the link as appropriate.
3866:
3867: =cut
3868:
3869: sub hasDiscussion {
3870: my $self = shift;
3871: return $self->{NAV_MAP}->hasDiscussion($self->symb());
3872: }
3873:
3874: sub getFeedback {
3875: my $self = shift;
1.124 bowersj2 3876: my $source = $self->src();
1.125 bowersj2 3877: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.124 bowersj2 3878: return $self->{NAV_MAP}->getFeedback($source);
3879: }
3880:
3881: sub getErrors {
3882: my $self = shift;
3883: my $source = $self->src();
3884: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
3885: return $self->{NAV_MAP}->getErrors($source);
1.59 bowersj2 3886: }
3887:
3888: =pod
3889:
1.174 albertel 3890: =item * B<parts>():
1.51 bowersj2 3891:
1.174 albertel 3892: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 3893: each part of the problem. Single part problems have only a part '0'.
3894: Multipart problems do not return their part '0', since they typically
3895: do not really matter.
1.174 albertel 3896:
3897: =item * B<countParts>():
3898:
3899: Returns the number of parts of the problem a student can answer. Thus,
3900: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 3901: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 3902:
1.192 bowersj2 3903: =item * B<multipart>():
3904:
1.193 bowersj2 3905: Returns true if the problem is multipart, false otherwise. Use this instead
3906: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 3907:
1.187 bowersj2 3908: =item * B<responseType>($part):
3909:
3910: Returns the response type of the part, without the word "response" on the
3911: end. Example return values: 'string', 'essay', 'numeric', etc.
3912:
1.193 bowersj2 3913: =item * B<responseIds>($part):
1.187 bowersj2 3914:
1.193 bowersj2 3915: Retreives the response IDs for the given part as an array reference containing
3916: strings naming the response IDs. This may be empty.
1.187 bowersj2 3917:
1.51 bowersj2 3918: =back
3919:
3920: =cut
3921:
3922: sub parts {
3923: my $self = shift;
3924:
1.192 bowersj2 3925: if ($self->ext) { return []; }
1.67 bowersj2 3926:
1.51 bowersj2 3927: $self->extractParts();
3928: return $self->{PARTS};
3929: }
3930:
3931: sub countParts {
3932: my $self = shift;
3933:
3934: my $parts = $self->parts();
1.191 bowersj2 3935:
3936: # If I left this here, then it's not necessary.
3937: #my $delta = 0;
3938: #for my $part (@$parts) {
3939: # if ($part eq '0') { $delta--; }
3940: #}
1.66 bowersj2 3941:
3942: if ($self->{RESOURCE_ERROR}) {
3943: return 0;
3944: }
3945:
1.191 bowersj2 3946: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 3947: }
3948:
3949: sub multipart {
3950: my $self = shift;
3951: return $self->countParts() > 1;
1.51 bowersj2 3952: }
3953:
1.225 bowersj2 3954: sub singlepart {
3955: my $self = shift;
3956: return $self->countParts() == 1;
3957: }
3958:
1.187 bowersj2 3959: sub responseType {
1.184 bowersj2 3960: my $self = shift;
3961: my $part = shift;
3962:
3963: $self->extractParts();
1.235 albertel 3964: if (defined($self->{RESPONSE_TYPES}->{$part})) {
3965: return @{$self->{RESPONSE_TYPES}->{$part}};
3966: } else {
3967: return undef;
3968: }
1.187 bowersj2 3969: }
3970:
1.193 bowersj2 3971: sub responseIds {
1.187 bowersj2 3972: my $self = shift;
3973: my $part = shift;
3974:
3975: $self->extractParts();
1.235 albertel 3976: if (defined($self->{RESPONSE_IDS}->{$part})) {
3977: return @{$self->{RESPONSE_IDS}->{$part}};
3978: } else {
3979: return undef;
3980: }
1.184 bowersj2 3981: }
3982:
3983: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 3984: # part types, and saves it.
1.51 bowersj2 3985: sub extractParts {
3986: my $self = shift;
3987:
1.153 bowersj2 3988: return if (defined($self->{PARTS}));
1.67 bowersj2 3989: return if ($self->ext);
1.51 bowersj2 3990:
3991: $self->{PARTS} = [];
3992:
1.181 bowersj2 3993: my %parts;
3994:
1.82 bowersj2 3995: # Retrieve part count, if this is a problem
3996: if ($self->is_problem()) {
1.240 albertel 3997: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 3998: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 3999:
1.239 bowersj2 4000: if ($partorder) {
4001: my @parts;
4002: for my $part (split (/,/,$partorder)) {
4003: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4004: push @parts, $part;
1.241 albertel 4005: $parts{$part} = 1;
1.239 bowersj2 4006: }
4007: }
4008: $self->{PARTS} = \@parts;
4009: } else {
4010: if (!$metadata) {
4011: $self->{RESOURCE_ERROR} = 1;
4012: $self->{PARTS} = [];
4013: $self->{PART_TYPE} = {};
4014: return;
4015: }
4016: foreach (split(/\,/,$metadata)) {
4017: if ($_ =~ /^part_(.*)$/) {
4018: my $part = $1;
4019: # This floods the logs if it blows up
4020: if (defined($parts{$part})) {
1.241 albertel 4021: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
4022: }
1.239 bowersj2 4023:
4024: # check to see if part is turned off.
4025:
4026: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4027: $parts{$part} = 1;
4028: }
4029: }
4030: }
4031: my @sortedParts = sort keys %parts;
4032: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 4033: }
1.82 bowersj2 4034:
1.187 bowersj2 4035:
1.284 ! matthew 4036: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 4037: my %responseIdHash;
4038: my %responseTypeHash;
4039:
1.189 bowersj2 4040:
4041: # Init the responseIdHash
4042: foreach (@{$self->{PARTS}}) {
4043: $responseIdHash{$_} = [];
4044: }
4045:
1.187 bowersj2 4046: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 4047: # response id are delimited by underscores, but both the part
1.187 bowersj2 4048: # name and response id can themselves have underscores in them.
4049: # So we have to use our knowlege of part names to figure out
4050: # where the part names begin and end, and even then, it is possible
4051: # to construct ambiguous situations.
1.284 ! matthew 4052: #
! 4053: my %response_type_by_id;
1.187 bowersj2 4054: foreach (split /,/, $metadata) {
4055: if ($_ =~ /^([a-zA-Z]+)response_(.*)/) {
4056: my $responseType = $1;
4057: my $partStuff = $2;
4058: my $partIdSoFar = '';
4059: my @partChunks = split /_/, $partStuff;
4060: my $i = 0;
4061: for ($i = 0; $i < scalar(@partChunks); $i++) {
4062: if ($partIdSoFar) { $partIdSoFar .= '_'; }
4063: $partIdSoFar .= $partChunks[$i];
4064: if ($parts{$partIdSoFar}) {
4065: my @otherChunks = @partChunks[$i+1..$#partChunks];
4066: my $responseId = join('_', @otherChunks);
1.188 bowersj2 4067: push @{$responseIdHash{$partIdSoFar}}, $responseId;
1.233 matthew 4068: push @{$responseTypeHash{$partIdSoFar}}, $responseType;
1.284 ! matthew 4069: $response_type_by_id{$responseId} = $responseType;
1.187 bowersj2 4070: }
4071: }
4072: }
4073: }
1.264 albertel 4074: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 ! matthew 4075: #
! 4076: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 4077: if ($resorder) {
4078: my @resorder=split(/,/,$resorder);
4079: foreach my $part (keys(%responseIdHash)) {
4080: my %resids = map { ($_,1) } @{ $responseIdHash{$part} };
4081: my @neworder;
4082: foreach my $possibleid (@resorder) {
4083: if (exists($resids{$possibleid})) {
4084: push(@neworder,$possibleid);
4085: }
4086: }
4087: $responseIdHash{$part}=\@neworder;
4088: }
4089: }
1.284 ! matthew 4090: #
! 4091: # Reorder the response types
! 4092: foreach my $partid (keys(%responseIdHash)) {
! 4093: delete($responseTypeHash{$partid});
! 4094: foreach my $respid (@{$responseIdHash{$partid}}) {
! 4095: push(@{$responseTypeHash{$partid}},
! 4096: $response_type_by_id{$respid});
! 4097: }
! 4098: }
1.187 bowersj2 4099: $self->{RESPONSE_IDS} = \%responseIdHash;
4100: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 4101: }
4102:
1.51 bowersj2 4103: return;
4104: }
4105:
4106: =pod
4107:
4108: =head2 Resource Status
4109:
1.174 albertel 4110: Problem resources have status information, reflecting their various
4111: dates and completion statuses.
1.51 bowersj2 4112:
1.174 albertel 4113: There are two aspects to the status: the date-related information and
4114: the completion information.
1.51 bowersj2 4115:
1.174 albertel 4116: Idiomatic usage of these two methods would probably look something
4117: like
1.51 bowersj2 4118:
4119: foreach ($resource->parts()) {
4120: my $dateStatus = $resource->getDateStatus($_);
4121: my $completionStatus = $resource->getCompletionStatus($_);
4122:
1.70 bowersj2 4123: or
4124:
4125: my $status = $resource->status($_);
4126:
1.51 bowersj2 4127: ... use it here ...
4128: }
4129:
1.174 albertel 4130: Which you use depends on exactly what you are looking for. The
4131: status() function has been optimized for the nav maps display and may
4132: not precisely match what you need elsewhere.
1.101 bowersj2 4133:
1.174 albertel 4134: The symbolic constants shown below can be accessed through the
4135: resource object: C<$res->OPEN>.
1.101 bowersj2 4136:
1.51 bowersj2 4137: =over 4
4138:
1.174 albertel 4139: =item * B<getDateStatus>($part):
4140:
4141: ($part defaults to 0). A convenience function that returns a symbolic
4142: constant telling you about the date status of the part. The possible
4143: return values are:
1.51 bowersj2 4144:
4145: =back
4146:
4147: B<Date Codes>
4148:
4149: =over 4
4150:
1.174 albertel 4151: =item * B<OPEN_LATER>:
4152:
4153: The problem will be opened later.
4154:
4155: =item * B<OPEN>:
4156:
4157: Open and not yet due.
4158:
1.51 bowersj2 4159:
1.174 albertel 4160: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4161:
1.174 albertel 4162: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 4163:
1.174 albertel 4164: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 4165:
1.174 albertel 4166: The due date has passed and there is no answer opening date set.
1.51 bowersj2 4167:
1.174 albertel 4168: =item * B<ANSWER_OPEN>:
1.51 bowersj2 4169:
1.174 albertel 4170: The answer date is here.
4171:
4172: =item * B<NETWORK_FAILURE>:
4173:
4174: The information is unknown due to network failure.
1.51 bowersj2 4175:
4176: =back
4177:
4178: =cut
4179:
4180: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 4181: sub OPEN_LATER { return 0; }
4182: sub OPEN { return 1; }
4183: sub PAST_DUE_NO_ANSWER { return 2; }
4184: sub PAST_DUE_ANSWER_LATER { return 3; }
4185: sub ANSWER_OPEN { return 4; }
4186: sub NOTHING_SET { return 5; }
4187: sub NETWORK_FAILURE { return 100; }
4188:
4189: # getDateStatus gets the date status for a given problem part.
4190: # Because answer date, due date, and open date are fully independent
4191: # (i.e., it is perfectly possible to *only* have an answer date),
4192: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
4193: # (past, future, none given). This function handles this with a decision
4194: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 4195:
4196: sub getDateStatus {
4197: my $self = shift;
4198: my $part = shift;
4199: $part = "0" if (!defined($part));
1.54 bowersj2 4200:
4201: # Always return network failure if there was one.
1.51 bowersj2 4202: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4203:
4204: my $now = time();
4205:
1.53 bowersj2 4206: my $open = $self->opendate($part);
4207: my $due = $self->duedate($part);
4208: my $answer = $self->answerdate($part);
4209:
4210: if (!$open && !$due && !$answer) {
4211: # no data on the problem at all
4212: # should this be the same as "open later"? think multipart.
4213: return $self->NOTHING_SET;
4214: }
1.59 bowersj2 4215: if (!$open || $now < $open) {return $self->OPEN_LATER}
4216: if (!$due || $now < $due) {return $self->OPEN}
4217: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
4218: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 4219: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 4220: }
4221:
4222: =pod
4223:
4224: B<>
4225:
4226: =over 4
4227:
1.174 albertel 4228: =item * B<getCompletionStatus>($part):
1.51 bowersj2 4229:
1.174 albertel 4230: ($part defaults to 0.) A convenience function that returns a symbolic
4231: constant telling you about the completion status of the part, with the
4232: following possible results:
4233:
4234: =back
1.51 bowersj2 4235:
4236: B<Completion Codes>
4237:
4238: =over 4
4239:
1.174 albertel 4240: =item * B<NOT_ATTEMPTED>:
4241:
4242: Has not been attempted at all.
4243:
4244: =item * B<INCORRECT>:
4245:
4246: Attempted, but wrong by student.
1.51 bowersj2 4247:
1.174 albertel 4248: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 4249:
1.174 albertel 4250: Attempted, but wrong by instructor override.
1.51 bowersj2 4251:
1.174 albertel 4252: =item * B<CORRECT>:
1.51 bowersj2 4253:
1.174 albertel 4254: Correct or correct by instructor.
1.51 bowersj2 4255:
1.174 albertel 4256: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 4257:
1.174 albertel 4258: Correct by instructor override.
1.51 bowersj2 4259:
1.174 albertel 4260: =item * B<EXCUSED>:
4261:
4262: Excused. Not yet implemented.
4263:
4264: =item * B<NETWORK_FAILURE>:
4265:
4266: Information not available due to network failure.
4267:
4268: =item * B<ATTEMPTED>:
4269:
4270: Attempted, and not yet graded.
1.69 bowersj2 4271:
1.51 bowersj2 4272: =back
4273:
4274: =cut
4275:
1.53 bowersj2 4276: sub NOT_ATTEMPTED { return 10; }
4277: sub INCORRECT { return 11; }
4278: sub INCORRECT_BY_OVERRIDE { return 12; }
4279: sub CORRECT { return 13; }
4280: sub CORRECT_BY_OVERRIDE { return 14; }
4281: sub EXCUSED { return 15; }
1.69 bowersj2 4282: sub ATTEMPTED { return 16; }
1.51 bowersj2 4283:
4284: sub getCompletionStatus {
4285: my $self = shift;
4286: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4287:
1.108 bowersj2 4288: my $status = $self->queryRestoreHash('solved', shift);
1.51 bowersj2 4289:
1.251 www 4290: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 4291: if ($status eq 'correct_by_student') {return $self->CORRECT;}
4292: if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }
4293: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
4294: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
4295: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 4296: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 4297: return $self->NOT_ATTEMPTED;
1.108 bowersj2 4298: }
4299:
4300: sub queryRestoreHash {
4301: my $self = shift;
4302: my $hashentry = shift;
4303: my $part = shift;
1.185 bowersj2 4304: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 4305: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4306:
4307: $self->getReturnHash();
4308:
4309: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 4310: }
4311:
4312: =pod
4313:
4314: B<Composite Status>
4315:
1.174 albertel 4316: Along with directly returning the date or completion status, the
4317: resource object includes a convenience function B<status>() that will
4318: combine the two status tidbits into one composite status that can
1.191 bowersj2 4319: represent the status of the resource as a whole. This method represents
4320: the concept of the thing we want to display to the user on the nav maps
4321: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 4322: documented in the comments of the status method. The following results
4323: may be returned, all available as methods on the resource object
1.185 bowersj2 4324: ($res->NETWORK_FAILURE): In addition to the return values that match
4325: the date or completion status, this function can return "ANSWER_SUBMITTED"
4326: if that problemstatus parameter value is set to No, suppressing the
4327: incorrect/correct feedback.
1.51 bowersj2 4328:
4329: =over 4
4330:
1.174 albertel 4331: =item * B<NETWORK_FAILURE>:
4332:
4333: The network has failed and the information is not available.
1.51 bowersj2 4334:
1.174 albertel 4335: =item * B<NOTHING_SET>:
1.53 bowersj2 4336:
1.174 albertel 4337: No dates have been set for this problem (part) at all. (Because only
4338: certain parts of a multi-part problem may be assigned, this can not be
4339: collapsed into "open later", as we do not know a given part will EVER
4340: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 4341:
1.174 albertel 4342: =item * B<CORRECT>:
1.51 bowersj2 4343:
1.174 albertel 4344: For any reason at all, the part is considered correct.
1.54 bowersj2 4345:
1.174 albertel 4346: =item * B<EXCUSED>:
1.51 bowersj2 4347:
1.174 albertel 4348: For any reason at all, the problem is excused.
1.51 bowersj2 4349:
1.174 albertel 4350: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 4351:
1.174 albertel 4352: The problem is past due, not considered correct, and no answer date is
4353: set.
1.51 bowersj2 4354:
1.174 albertel 4355: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4356:
1.174 albertel 4357: The problem is past due, not considered correct, and an answer date in
4358: the future is set.
1.51 bowersj2 4359:
1.174 albertel 4360: =item * B<ANSWER_OPEN>:
4361:
4362: The problem is past due, not correct, and the answer is now available.
4363:
4364: =item * B<OPEN_LATER>:
4365:
4366: The problem is not yet open.
4367:
4368: =item * B<TRIES_LEFT>:
4369:
4370: The problem is open, has been tried, is not correct, but there are
4371: tries left.
4372:
4373: =item * B<INCORRECT>:
4374:
4375: The problem is open, and all tries have been used without getting the
4376: correct answer.
4377:
4378: =item * B<OPEN>:
4379:
4380: The item is open and not yet tried.
4381:
4382: =item * B<ATTEMPTED>:
4383:
4384: The problem has been attempted.
1.69 bowersj2 4385:
1.185 bowersj2 4386: =item * B<ANSWER_SUBMITTED>:
4387:
4388: An answer has been submitted, but the student should not see it.
4389:
1.51 bowersj2 4390: =back
4391:
4392: =cut
4393:
1.185 bowersj2 4394: sub TRIES_LEFT { return 20; }
4395: sub ANSWER_SUBMITTED { return 21; }
1.51 bowersj2 4396:
4397: sub status {
4398: my $self = shift;
4399: my $part = shift;
4400: if (!defined($part)) { $part = "0"; }
4401: my $completionStatus = $self->getCompletionStatus($part);
4402: my $dateStatus = $self->getDateStatus($part);
4403:
4404: # What we have is a two-dimensional matrix with 4 entries on one
4405: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 4406: # plus network failure and "no date data at all".
1.51 bowersj2 4407:
1.222 bowersj2 4408: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 4409: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 4410:
1.236 bowersj2 4411: my $suppressFeedback = $self->problemstatus($part) eq 'no';
4412: # If there's an answer date and we're past it, don't
4413: # suppress the feedback; student should know
4414: if ($self->answerdate($part) && $self->answerdate($part) < time()) {
4415: $suppressFeedback = 0;
4416: }
1.185 bowersj2 4417:
1.51 bowersj2 4418: # There are a few whole rows we can dispose of:
1.53 bowersj2 4419: if ($completionStatus == CORRECT ||
4420: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.185 bowersj2 4421: return $suppressFeedback? ANSWER_SUBMITTED : CORRECT;
1.69 bowersj2 4422: }
4423:
4424: if ($completionStatus == ATTEMPTED) {
4425: return ATTEMPTED;
1.53 bowersj2 4426: }
4427:
4428: # If it's EXCUSED, then return that no matter what
4429: if ($completionStatus == EXCUSED) {
4430: return EXCUSED;
1.51 bowersj2 4431: }
4432:
1.53 bowersj2 4433: if ($dateStatus == NOTHING_SET) {
4434: return NOTHING_SET;
1.51 bowersj2 4435: }
4436:
1.69 bowersj2 4437: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
4438: # by 4 matrix (date statuses).
1.51 bowersj2 4439:
1.54 bowersj2 4440: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 4441: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 4442: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 4443: }
4444:
1.53 bowersj2 4445: if ($dateStatus == ANSWER_OPEN) {
4446: return ANSWER_OPEN;
1.51 bowersj2 4447: }
4448:
4449: # Now: (incorrect, incorrect_override, not_attempted) x
4450: # (open_later), (open)
4451:
1.53 bowersj2 4452: if ($dateStatus == OPEN_LATER) {
4453: return OPEN_LATER;
1.51 bowersj2 4454: }
4455:
4456: # If it's WRONG...
1.53 bowersj2 4457: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 4458: # and there are TRIES LEFT:
1.79 bowersj2 4459: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 4460: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 4461: }
1.185 bowersj2 4462: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 4463: }
4464:
4465: # Otherwise, it's untried and open
1.53 bowersj2 4466: return OPEN;
1.224 bowersj2 4467: }
4468:
4469: sub CLOSED { return 23; }
4470: sub ERROR { return 24; }
4471:
4472: =pod
4473:
4474: B<Simple Status>
4475:
4476: Convenience method B<simpleStatus> provides a "simple status" for the resource.
4477: "Simple status" corresponds to "which icon is shown on the
4478: Navmaps". There are six "simple" statuses:
4479:
4480: =over 4
4481:
4482: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
4483:
4484: =item * B<OPEN>: The problem is open and unattempted.
4485:
4486: =item * B<CORRECT>: The problem is correct for any reason.
4487:
4488: =item * B<INCORRECT>: The problem is incorrect and can still be
4489: completed successfully.
4490:
4491: =item * B<ATTEMPTED>: The problem has been attempted, but the student
4492: does not know if they are correct. (The ellipsis icon.)
4493:
4494: =item * B<ERROR>: There is an error retrieving information about this
4495: problem.
4496:
4497: =back
4498:
4499: =cut
4500:
4501: # This hash maps the composite status to this simple status, and
4502: # can be used directly, if you like
4503: my %compositeToSimple =
4504: (
4505: NETWORK_FAILURE() => ERROR,
4506: NOTHING_SET() => CLOSED,
4507: CORRECT() => CORRECT,
4508: EXCUSED() => CORRECT,
4509: PAST_DUE_NO_ANSWER() => INCORRECT,
4510: PAST_DUE_ANSWER_LATER() => INCORRECT,
4511: ANSWER_OPEN() => INCORRECT,
4512: OPEN_LATER() => CLOSED,
4513: TRIES_LEFT() => OPEN,
4514: INCORRECT() => INCORRECT,
4515: OPEN() => OPEN,
4516: ATTEMPTED() => ATTEMPTED,
4517: ANSWER_SUBMITTED() => ATTEMPTED
4518: );
4519:
4520: sub simpleStatus {
4521: my $self = shift;
4522: my $part = shift;
4523: my $status = $self->status($part);
4524: return $compositeToSimple{$status};
1.225 bowersj2 4525: }
4526:
4527: =pod
4528:
4529: B<simpleStatusCount> will return an array reference containing, in
4530: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
4531: and ERROR parts the given problem has.
4532:
4533: =cut
4534:
4535: # This maps the status to the slot we want to increment
4536: my %statusToSlotMap =
4537: (
4538: OPEN() => 0,
4539: CLOSED() => 1,
4540: CORRECT() => 2,
4541: INCORRECT() => 3,
4542: ATTEMPTED() => 4,
4543: ERROR() => 5
4544: );
4545:
4546: sub statusToSlot { return $statusToSlotMap{shift()}; }
4547:
4548: sub simpleStatusCount {
4549: my $self = shift;
4550:
4551: my @counts = (0, 0, 0, 0, 0, 0, 0);
4552: foreach my $part (@{$self->parts()}) {
4553: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
4554: }
4555:
4556: return \@counts;
1.191 bowersj2 4557: }
4558:
4559: =pod
4560:
4561: B<Completable>
4562:
4563: The completable method represents the concept of I<whether the student can
4564: currently do the problem>. If the student can do the problem, which means
4565: that it is open, there are tries left, and if the problem is manually graded
4566: or the grade is suppressed via problemstatus, the student has not tried it
4567: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
4568: either the student has tried it and there is no feedback, or that for
4569: some reason it is no longer completable (not open yet, successfully completed,
4570: out of tries, etc.). As an example, this is used as the filter for the
4571: "Uncompleted Homework" option for the nav maps.
4572:
4573: If this does not quite meet your needs, do not fiddle with it (unless you are
4574: fixing it to better match the student's conception of "completable" because
4575: it's broken somehow)... make a new method.
4576:
4577: =cut
4578:
4579: sub completable {
4580: my $self = shift;
4581: if (!$self->is_problem()) { return 0; }
4582: my $partCount = $self->countParts();
4583:
4584: foreach my $part (@{$self->parts()}) {
4585: if ($part eq '0' && $partCount != 1) { next; }
4586: my $status = $self->status($part);
4587: # "If any of the parts are open, or have tries left (implies open),
4588: # and it is not "attempted" (manually graded problem), it is
4589: # not "complete"
1.216 bowersj2 4590: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
4591: $status == ANSWER_SUBMITTED() ) {
4592: # did this part already, as well as we can
4593: next;
4594: }
4595: if ($status == OPEN() || $status == TRIES_LEFT()) {
4596: return 1;
4597: }
1.191 bowersj2 4598: }
4599:
4600: # If all the parts were complete, so was this problem.
1.216 bowersj2 4601: return 0;
1.51 bowersj2 4602: }
4603:
4604: =pod
4605:
4606: =head2 Resource/Nav Map Navigation
4607:
4608: =over 4
4609:
1.174 albertel 4610: =item * B<getNext>():
4611:
4612: Retreive an array of the possible next resources after this
4613: one. Always returns an array, even in the one- or zero-element case.
4614:
4615: =item * B<getPrevious>():
1.85 bowersj2 4616:
1.174 albertel 4617: Retreive an array of the possible previous resources from this
4618: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 4619:
4620: =cut
4621:
4622: sub getNext {
4623: my $self = shift;
4624: my @branches;
4625: my $to = $self->to();
1.85 bowersj2 4626: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 4627: my $choice = $self->{NAV_MAP}->getById($branch);
4628: my $next = $choice->goesto();
4629: $next = $self->{NAV_MAP}->getById($next);
4630:
1.131 bowersj2 4631: push @branches, $next;
1.85 bowersj2 4632: }
4633: return \@branches;
4634: }
4635:
4636: sub getPrevious {
4637: my $self = shift;
4638: my @branches;
4639: my $from = $self->from();
4640: foreach my $branch ( split /,/, $from) {
4641: my $choice = $self->{NAV_MAP}->getById($branch);
4642: my $prev = $choice->comesfrom();
4643: $prev = $self->{NAV_MAP}->getById($prev);
4644:
1.131 bowersj2 4645: push @branches, $prev;
1.51 bowersj2 4646: }
4647: return \@branches;
1.131 bowersj2 4648: }
4649:
4650: sub browsePriv {
4651: my $self = shift;
4652: if (defined($self->{BROWSE_PRIV})) {
4653: return $self->{BROWSE_PRIV};
4654: }
4655:
4656: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre', $self->src());
1.51 bowersj2 4657: }
4658:
4659: =pod
1.2 www 4660:
1.51 bowersj2 4661: =back
1.2 www 4662:
1.51 bowersj2 4663: =cut
1.2 www 4664:
1.51 bowersj2 4665: 1;
1.2 www 4666:
1.51 bowersj2 4667: __END__
1.2 www 4668:
4669:
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