Annotation of loncom/interface/lonnavmaps.pm, revision 1.347
1.2 www 1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
1.1 www 3: #
1.347 ! www 4: # $Id: lonnavmaps.pm,v 1.346 2005/11/08 12:01:42 foxr Exp $
1.20 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.245 www 28: ###
1.2 www 29:
1.1 www 30: package Apache::lonnavmaps;
31:
32: use strict;
1.317 albertel 33: use GDBM_File;
1.2 www 34: use Apache::Constants qw(:common :http);
1.18 albertel 35: use Apache::loncommon();
1.150 www 36: use Apache::lonmenu();
1.305 albertel 37: use Apache::lonenc();
1.229 www 38: use Apache::lonlocal;
1.306 foxr 39: use Apache::lonnet;
1.73 bowersj2 40: use POSIX qw (floor strftime);
1.300 albertel 41: use Data::Dumper; # for debugging, not always
1.316 albertel 42: use Time::HiRes qw( gettimeofday tv_interval );
1.2 www 43:
1.133 bowersj2 44: # symbolic constants
45: sub SYMB { return 1; }
46: sub URL { return 2; }
47: sub NOTHING { return 3; }
48:
49: # Some data
50:
1.140 bowersj2 51: my $resObj = "Apache::lonnavmaps::resource";
52:
1.135 bowersj2 53: # Keep these mappings in sync with lonquickgrades, which uses the colors
54: # instead of the icons.
55: my %statusIconMap =
1.224 bowersj2 56: (
57: $resObj->CLOSED => '',
58: $resObj->OPEN => 'navmap.open.gif',
59: $resObj->CORRECT => 'navmap.correct.gif',
1.332 albertel 60: $resObj->PARTIALLY_CORRECT => 'navmap.ellipsis.gif',
1.224 bowersj2 61: $resObj->INCORRECT => 'navmap.wrong.gif',
62: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
63: $resObj->ERROR => ''
64: );
1.135 bowersj2 65:
66: my %iconAltTags =
67: ( 'navmap.correct.gif' => 'Correct',
68: 'navmap.wrong.gif' => 'Incorrect',
69: 'navmap.open.gif' => 'Open' );
1.133 bowersj2 70:
1.136 bowersj2 71: # Defines a status->color mapping, null string means don't color
72: my %colormap =
1.140 bowersj2 73: ( $resObj->NETWORK_FAILURE => '',
74: $resObj->CORRECT => '',
75: $resObj->EXCUSED => '#3333FF',
76: $resObj->PAST_DUE_ANSWER_LATER => '',
77: $resObj->PAST_DUE_NO_ANSWER => '',
78: $resObj->ANSWER_OPEN => '#006600',
79: $resObj->OPEN_LATER => '',
80: $resObj->TRIES_LEFT => '',
81: $resObj->INCORRECT => '',
82: $resObj->OPEN => '',
1.207 bowersj2 83: $resObj->NOTHING_SET => '',
84: $resObj->ATTEMPTED => '',
1.332 albertel 85: $resObj->ANSWER_SUBMITTED => '',
86: $resObj->PARTIALLY_CORRECT => '#006600'
1.207 bowersj2 87: );
1.136 bowersj2 88: # And a special case in the nav map; what to do when the assignment
89: # is not yet done and due in less then 24 hours
90: my $hurryUpColor = "#FF0000";
1.130 www 91:
1.268 albertel 92: sub launch_win {
1.336 albertel 93: my ($mode,$script,$toplinkitems,$firsttime)=@_;
1.268 albertel 94: my $result;
95: if ($script ne 'no') {
96: $result.='<script type="text/javascript">';
97: }
1.336 albertel 98: if ($firsttime) {
99: $result.='function launch_navmapwin() {
100: newWindow=open(\'/adm/navmaps?launchExternalRoles\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
101: }';
102: } else {
103: $result.='function launch_navmapwin() {
1.268 albertel 104: newWindow=open(\'/adm/navmaps?launchExternal\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
105: }';
1.336 albertel 106: }
1.268 albertel 107: if ($mode eq 'now') {
108: $result.="\nlaunch_navmapwin();\n";
109: }
110: if ($script ne 'no') {
111: $result.='</script>';
112: }
113: if ($mode eq 'link') {
1.281 albertel 114: &add_linkitem($toplinkitems,'launchnav','launch_navmapwin()',
115: "Launch navigation window");
1.268 albertel 116: }
117: return $result;
118: }
119:
1.269 albertel 120: sub close {
1.320 albertel 121: if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
1.269 albertel 122: return(<<ENDCLOSE);
123: <script type="text/javascript">
124: window.status='Accessing Nav Control';
125: menu=window.open("/adm/rat/empty.html","loncapanav",
126: "height=600,width=400,scrollbars=1");
127: window.status='Closing Nav Control';
128: menu.close();
129: window.status='Done.';
130: </script>
131: ENDCLOSE
132: }
1.268 albertel 133:
1.270 albertel 134: sub update {
1.320 albertel 135: if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
136: if (!$env{'request.course.id'}) { return ''; }
1.270 albertel 137: if ($ENV{'REQUEST_URI'}=~m|^/adm/navmaps|) { return ''; }
138: return(<<ENDUPDATE);
139: <form name="navform"></form>
140: <script type="text/javascript">
141: this.document.navform.action='/adm/navmaps#curloc';
142: this.document.navform.target='loncapanav';
143: this.document.navform.submit();
144: </script>
145: ENDUPDATE
146: }
1.268 albertel 147:
1.1 www 148: sub handler {
1.99 bowersj2 149: my $r = shift;
1.118 bowersj2 150: real_handler($r);
151: }
152:
153: sub real_handler {
154: my $r = shift;
1.316 albertel 155: #my $t0=[&gettimeofday()];
1.51 bowersj2 156: # Handle header-only request
157: if ($r->header_only) {
1.320 albertel 158: if ($env{'browser.mathml'}) {
1.232 www 159: &Apache::loncommon::content_type($r,'text/xml');
1.51 bowersj2 160: } else {
1.232 www 161: &Apache::loncommon::content_type($r,'text/html');
1.51 bowersj2 162: }
163: $r->send_http_header;
164: return OK;
165: }
166:
167: # Send header, don't cache this page
1.320 albertel 168: if ($env{'browser.mathml'}) {
1.232 www 169: &Apache::loncommon::content_type($r,'text/xml');
1.51 bowersj2 170: } else {
1.232 www 171: &Apache::loncommon::content_type($r,'text/html');
1.51 bowersj2 172: }
173: &Apache::loncommon::no_cache($r);
174: $r->send_http_header;
175:
1.281 albertel 176: my %toplinkitems=();
1.312 albertel 177: &add_linkitem(\%toplinkitems,'blank','',"Select Action");
1.268 albertel 178: if ($ENV{QUERY_STRING} eq 'collapseExternal') {
179: &Apache::lonnet::put('environment',{'remotenavmap' => 'off'});
180: &Apache::lonnet::appenv('environment.remotenavmap' => 'off');
1.275 albertel 181: my $menu=&Apache::lonmenu::reopenmenu();
182: my $navstatus=&Apache::lonmenu::get_nav_status();
183: if ($menu) {
184: $menu=(<<MENU)
185: swmenu=$menu
186: swmenu.clearTimeout(swmenu.menucltim);
187: $navstatus
188: MENU
1.280 albertel 189: } else {
190: my $nothing = &Apache::lonhtmlcommon::javascript_nothing();
191: my $mainwindow='window.open('.$nothing.',"loncapaclient","",false);';
192: $menu=(<<MENU)
193: swmenu=$mainwindow
194: $navstatus
195: MENU
1.275 albertel 196: }
1.316 albertel 197: my $html=&Apache::lonxml::xmlbegin();
1.268 albertel 198: $r->print(<<"ENDSUBM");
1.316 albertel 199: $html
1.268 albertel 200: <head>
201: <script type="text/javascript">
202: function submitthis() {
1.275 albertel 203: $menu
1.268 albertel 204: self.close();
205: }
1.275 albertel 206:
1.268 albertel 207: </script>
208: </head>
209: <body bgcolor="#FFFFFF" onLoad="submitthis()"></body>
210: </html>
211: ENDSUBM
212: return;
213: }
1.336 albertel 214: if ($ENV{QUERY_STRING} =~ /^launchExternal/) {
1.268 albertel 215: &Apache::lonnet::put('environment',{'remotenavmap' => 'on'});
216: &Apache::lonnet::appenv('environment.remotenavmap' => 'on');
1.335 albertel 217: my $menu=&Apache::lonmenu::reopenmenu();
218: my $navstatus=&Apache::lonmenu::get_nav_status();
219: if ($menu) {
220: $r->print(<<MENU);
221: <script type="text/javascript">
222: swmenu=$menu
223: swmenu.clearTimeout(swmenu.menucltim);
224: $navstatus
225: </script>
226: MENU
227: }
228: }
229: if ($ENV{QUERY_STRING} eq 'turningOffExternal') {
230: $env{'environment.remotenavmap'}='off';
1.268 albertel 231: }
232:
1.106 bowersj2 233: # Create the nav map
1.221 bowersj2 234: my $navmap = Apache::lonnavmaps::navmap->new();
1.51 bowersj2 235:
1.55 bowersj2 236: if (!defined($navmap)) {
237: my $requrl = $r->uri;
1.320 albertel 238: $env{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";
1.55 bowersj2 239: return HTTP_NOT_ACCEPTABLE;
240: }
1.316 albertel 241: my $html=&Apache::lonxml::xmlbegin();
242: $r->print("$html<head>\n");
1.229 www 243: $r->print("<title>".&mt('Navigate Course Contents')."</title>");
1.150 www 244: # ------------------------------------------------------------ Get query string
1.313 albertel 245: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register','sort','showOnlyHomework','postsymb']);
1.158 bowersj2 246:
1.150 www 247: # ----------------------------------------------------- Force menu registration
248: my $addentries='';
1.268 albertel 249: my $more_unload;
1.278 albertel 250: my $body_only='';
1.320 albertel 251: if ($env{'environment.remotenavmap'} eq 'on') {
1.268 albertel 252: $r->print('<script type="text/javascript">
253: function collapse() {
254: this.document.location="/adm/navmaps?collapseExternal";
255: }
256: </script>');
257: # FIXME need to be smarter to only catch window close events
258: # $more_unload="collapse()"
1.278 albertel 259: $body_only=1;
1.268 albertel 260: }
1.320 albertel 261: if ($env{'form.register'}) {
1.268 albertel 262: $addentries=' onLoad="'.&Apache::lonmenu::loadevents().
263: '" onUnload="'.&Apache::lonmenu::unloadevents().';'.
264: $more_unload.'"';
265: $r->print(&Apache::lonmenu::registerurl(1));
266: } else {
267: $addentries=' onUnload="'.$more_unload.'"';
1.150 www 268: }
1.111 bowersj2 269:
1.64 bowersj2 270: # Header
1.150 www 271: $r->print('</head>'.
272: &Apache::loncommon::bodytag('Navigate Course Contents','',
1.278 albertel 273: $addentries,$body_only,'',
1.320 albertel 274: $env{'form.register'}));
1.283 raeburn 275: $r->print('<script>window.focus();</script>');
1.265 albertel 276:
1.124 bowersj2 277: $r->rflush();
278:
1.55 bowersj2 279: # Check that it's defined
280: if (!($navmap->courseMapDefined())) {
1.283 raeburn 281: $r->print(&Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT'));
1.55 bowersj2 282: $r->print('<font size="+2" color="red">Coursemap undefined.</font>' .
283: '</body></html>');
284: return OK;
285: }
286:
1.178 bowersj2 287: # See if there's only one map in the top-level, if we don't
288: # already have a filter... if so, automatically display it
1.222 bowersj2 289: # (older code; should use retrieveResources)
1.179 bowersj2 290: if ($ENV{QUERY_STRING} !~ /filter/) {
1.178 bowersj2 291: my $iterator = $navmap->getIterator(undef, undef, undef, 0);
1.222 bowersj2 292: my $curRes;
1.178 bowersj2 293: my $sequenceCount = 0;
294: my $sequenceId;
1.222 bowersj2 295: while ($curRes = $iterator->next()) {
1.178 bowersj2 296: if (ref($curRes) && $curRes->is_sequence()) {
297: $sequenceCount++;
298: $sequenceId = $curRes->map_pc();
1.179 bowersj2 299: }
1.178 bowersj2 300: }
301:
302: if ($sequenceCount == 1) {
303: # The automatic iterator creation in the render call
304: # will pick this up. We know the condition because
1.320 albertel 305: # the defined($env{'form.filter'}) also ensures this
1.178 bowersj2 306: # is a fresh call.
1.320 albertel 307: $env{'form.filter'} = "$sequenceId";
1.155 bowersj2 308: }
309: }
310:
1.268 albertel 311: if ($ENV{QUERY_STRING} eq 'launchExternal') {
312: $r->print('
1.335 albertel 313: <form name="returnwin" action="/adm/flip?postdata=navlaunch%3a"
1.268 albertel 314: method="post" target="loncapaclient">
315: </form>');
316: $r->print('
317: <script type="text/javascript">
318: this.document.returnwin.submit();
319: </script>');
320: }
321:
1.320 albertel 322: if ($env{'environment.remotenavmap'} ne 'on') {
1.281 albertel 323: $r->print(&launch_win('link','yes',\%toplinkitems));
1.268 albertel 324: }
1.320 albertel 325: if ($env{'environment.remotenavmap'} eq 'on') {
1.281 albertel 326: &add_linkitem(\%toplinkitems,'closenav','collapse()',
327: "Close navigation window");
1.268 albertel 328: }
329:
1.191 bowersj2 330: my $jumpToFirstHomework = 0;
1.184 bowersj2 331: # Check to see if the student is jumping to next open, do-able problem
1.281 albertel 332: if ($ENV{QUERY_STRING} =~ /^jumpToFirstHomework/) {
1.191 bowersj2 333: $jumpToFirstHomework = 1;
1.184 bowersj2 334: # Find the next homework problem that they can do.
335: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 336: my $curRes;
1.184 bowersj2 337: my $foundDoableProblem = 0;
338: my $problemRes;
339:
1.222 bowersj2 340: while (($curRes = $iterator->next()) && !$foundDoableProblem) {
1.184 bowersj2 341: if (ref($curRes) && $curRes->is_problem()) {
342: my $status = $curRes->status();
1.191 bowersj2 343: if ($curRes->completable()) {
1.184 bowersj2 344: $problemRes = $curRes;
345: $foundDoableProblem = 1;
346:
347: # Pop open all previous maps
348: my $stack = $iterator->getStack();
349: pop @$stack; # last resource in the stack is the problem
350: # itself, which we don't need in the map stack
351: my @mapPcs = map {$_->map_pc()} @$stack;
1.320 albertel 352: $env{'form.filter'} = join(',', @mapPcs);
1.184 bowersj2 353:
354: # Mark as both "here" and "jump"
1.320 albertel 355: $env{'form.postsymb'} = $curRes->symb();
1.184 bowersj2 356: }
357: }
358: }
359:
360: # If we found no problems, print a note to that effect.
361: if (!$foundDoableProblem) {
362: $r->print("<font size='+2'>All homework assignments have been completed.</font><br /><br />");
363: }
364: } else {
1.281 albertel 365: &add_linkitem(\%toplinkitems,'firsthomework',
366: 'location.href="navmaps?jumpToFirstHomework"',
1.287 albertel 367: "Show Me My First Homework Problem");
1.184 bowersj2 368: }
369:
1.191 bowersj2 370: my $suppressEmptySequences = 0;
371: my $filterFunc = undef;
1.201 bowersj2 372: my $resource_no_folder_link = 0;
373:
1.191 bowersj2 374: # Display only due homework.
375: my $showOnlyHomework = 0;
1.320 albertel 376: if ($env{'form.showOnlyHomework'} eq "1") {
1.191 bowersj2 377: $showOnlyHomework = 1;
378: $suppressEmptySequences = 1;
379: $filterFunc = sub { my $res = shift;
1.201 bowersj2 380: return $res->completable() || $res->is_map();
1.191 bowersj2 381: };
1.281 albertel 382: &add_linkitem(\%toplinkitems,'everything',
1.320 albertel 383: 'location.href="navmaps?sort='.$env{'form.sort'}.'"',
1.281 albertel 384: "Show Everything");
1.229 www 385: $r->print("<p><font size='+2'>".&mt("Uncompleted Homework")."</font></p>");
1.320 albertel 386: $env{'form.filter'} = '';
387: $env{'form.condition'} = 1;
1.201 bowersj2 388: $resource_no_folder_link = 1;
1.191 bowersj2 389: } else {
1.281 albertel 390: &add_linkitem(\%toplinkitems,'uncompleted',
1.320 albertel 391: 'location.href="navmaps?sort='.$env{'form.sort'}.
1.281 albertel 392: '&showOnlyHomework=1"',
393: "Show Only Uncompleted Homework");
1.191 bowersj2 394: }
395:
1.320 albertel 396: my %selected=($env{'form.sort'} => 'selected=on');
1.276 albertel 397: my $sort_html=("<form>
1.270 albertel 398: <nobr>
1.320 albertel 399: <input type=\"hidden\" name=\"showOnlyHomework\" value=\"".$env{'form.showOnlyHomework'}."\" />
1.276 albertel 400: <input type=\"submit\" value=\"".&mt('Sort by:')."\" />
1.270 albertel 401: <select name=\"sort\">
1.276 albertel 402: <option value=\"default\" $selected{'default'}>".&mt('Default')."</option>
403: <option value=\"title\" $selected{'title'} >".&mt('Title')."</option>
404: <option value=\"duedate\" $selected{'duedate'}>".&mt('Duedate')."</option>
1.307 raeburn 405: <option value=\"discussion\" $selected{'discussion'}>".&mt('Has New Discussion')."</option>
1.270 albertel 406: </select>
407: </nobr>
408: </form>");
1.133 bowersj2 409: # renderer call
1.285 albertel 410: my $renderArgs = { 'cols' => [0,1,2,3],
1.320 albertel 411: 'sort' => $env{'form.sort'},
1.191 bowersj2 412: 'url' => '/adm/navmaps',
413: 'navmap' => $navmap,
414: 'suppressNavmap' => 1,
415: 'suppressEmptySequences' => $suppressEmptySequences,
416: 'filterFunc' => $filterFunc,
1.201 bowersj2 417: 'resource_no_folder_link' => $resource_no_folder_link,
1.276 albertel 418: 'sort_html'=> $sort_html,
1.281 albertel 419: 'r' => $r,
420: 'caller' => 'navmapsdisplay',
421: 'linkitems' => \%toplinkitems};
1.191 bowersj2 422: my $render = render($renderArgs);
1.133 bowersj2 423:
1.191 bowersj2 424: # If no resources were printed, print a reassuring message so the
425: # user knows there was no error.
426: if ($renderArgs->{'counter'} == 0) {
427: if ($showOnlyHomework) {
1.229 www 428: $r->print("<p><font size='+1'>".&mt("All homework is currently completed").".</font></p>");
1.191 bowersj2 429: } else { # both jumpToFirstHomework and normal use the same: course must be empty
430: $r->print("<p><font size='+1'>This course is empty.</font></p>");
431: }
432: }
1.316 albertel 433: #my $td=&tv_interval($t0);
434: #$r->print("<br />$td");
1.51 bowersj2 435:
1.128 bowersj2 436: $r->print("</body></html>");
1.134 bowersj2 437: $r->rflush();
1.59 bowersj2 438:
1.51 bowersj2 439: return OK;
440: }
441:
442: # Convenience functions: Returns a string that adds or subtracts
443: # the second argument from the first hash, appropriate for the
444: # query string that determines which folders to recurse on
445: sub addToFilter {
446: my $hashIn = shift;
447: my $addition = shift;
448: my %hash = %$hashIn;
449: $hash{$addition} = 1;
450:
451: return join (",", keys(%hash));
452: }
453:
454: sub removeFromFilter {
455: my $hashIn = shift;
456: my $subtraction = shift;
457: my %hash = %$hashIn;
458:
459: delete $hash{$subtraction};
460: return join(",", keys(%hash));
461: }
462:
463: # Convenience function: Given a stack returned from getStack on the iterator,
464: # return the correct src() value.
465: sub getLinkForResource {
466: my $stack = shift;
467: my $res;
468:
469: # Check to see if there are any pages in the stack
470: foreach $res (@$stack) {
1.248 www 471: if (defined($res)) {
1.308 albertel 472: my $anchor;
1.248 www 473: if ($res->is_page()) {
1.308 albertel 474: foreach (@$stack) { if (defined($_)) { $anchor = $_; } }
475: $anchor=&Apache::lonnet::escape($anchor->shown_symb());
476: return ($res->link(),$res->shown_symb(),$anchor);
1.248 www 477: }
478: # in case folder was skipped over as "only sequence"
479: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
480: if ($map=~/\.page$/) {
1.308 albertel 481: my $url=&Apache::lonnet::clutter($map);
482: $anchor=&Apache::lonnet::escape($src->shown_symb());
483: return ($url,$res->shown_symb(),$anchor);
1.248 www 484: }
1.51 bowersj2 485: }
486: }
487:
488: # Failing that, return the src of the last resource that is defined
489: # (when we first recurse on a map, it puts an undefined resource
490: # on the bottom because $self->{HERE} isn't defined yet, and we
491: # want the src for the map anyhow)
492: foreach (@$stack) {
493: if (defined($_)) { $res = $_; }
494: }
495:
1.308 albertel 496: return ($res->link(),$res->shown_symb());
1.51 bowersj2 497: }
498:
1.251 www 499: # Convenience function: This separates the logic of how to create
1.53 bowersj2 500: # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
1.251 www 501: # etc.) into a separate function. It takes a resource object as the
1.53 bowersj2 502: # first parameter, and the part number of the resource as the second.
503: # It's basically a big switch statement on the status of the resource.
504:
505: sub getDescription {
506: my $res = shift;
507: my $part = shift;
1.69 bowersj2 508: my $status = $res->status($part);
1.53 bowersj2 509:
1.182 bowersj2 510: if ($status == $res->NETWORK_FAILURE) {
1.229 www 511: return &mt("Having technical difficulties; please check status later");
1.182 bowersj2 512: }
1.53 bowersj2 513: if ($status == $res->NOTHING_SET) {
1.229 www 514: return &mt("Not currently assigned.");
1.53 bowersj2 515: }
516: if ($status == $res->OPEN_LATER) {
1.341 albertel 517: return "Open " . timeToHumanString($res->opendate($part),'start');
1.53 bowersj2 518: }
519: if ($status == $res->OPEN) {
1.79 bowersj2 520: if ($res->duedate($part)) {
1.341 albertel 521: return &mt("Due")." " .timeToHumanString($res->duedate($part),'end');
1.66 bowersj2 522: } else {
1.229 www 523: return &mt("Open, no due date");
1.66 bowersj2 524: }
1.53 bowersj2 525: }
1.54 bowersj2 526: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.341 albertel 527: return &mt("Answer open")." " . timeToHumanString($res->answerdate($part),'start');
1.54 bowersj2 528: }
529: if ($status == $res->PAST_DUE_NO_ANSWER) {
1.341 albertel 530: return &mt("Was due")." " . timeToHumanString($res->duedate($part),'end');
1.53 bowersj2 531: }
1.332 albertel 532: if ($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT) {
1.229 www 533: return &mt("Answer available");
1.53 bowersj2 534: }
1.59 bowersj2 535: if ($status == $res->EXCUSED) {
1.229 www 536: return &mt("Excused by instructor");
1.59 bowersj2 537: }
1.69 bowersj2 538: if ($status == $res->ATTEMPTED) {
1.229 www 539: return &mt("Answer submitted, not yet graded");
1.69 bowersj2 540: }
1.59 bowersj2 541: if ($status == $res->TRIES_LEFT) {
1.79 bowersj2 542: my $tries = $res->tries($part);
543: my $maxtries = $res->maxtries($part);
544: my $triesString = "";
545: if ($tries && $maxtries) {
546: $triesString = "<font size=\"-1\"><i>($tries of $maxtries tries used)</i></font>";
547: if ($maxtries > 1 && $maxtries - $tries == 1) {
548: $triesString = "<b>$triesString</b>";
549: }
550: }
1.244 albertel 551: if ($res->duedate($part)) {
1.341 albertel 552: return &mt("Due")." " . timeToHumanString($res->duedate($part),'end') .
1.66 bowersj2 553: " $triesString";
554: } else {
1.229 www 555: return &mt("No due date")." $triesString";
1.66 bowersj2 556: }
1.59 bowersj2 557: }
1.185 bowersj2 558: if ($status == $res->ANSWER_SUBMITTED) {
1.229 www 559: return &mt('Answer submitted');
1.185 bowersj2 560: }
1.53 bowersj2 561: }
562:
1.115 bowersj2 563: # Convenience function, so others can use it: Is the problem due in less then
564: # 24 hours, and still can be done?
565:
1.252 matthew 566: sub dueInLessThan24Hours {
1.115 bowersj2 567: my $res = shift;
568: my $part = shift;
569: my $status = $res->status($part);
570:
1.207 bowersj2 571: return ($status == $res->OPEN() ||
1.115 bowersj2 572: $status == $res->TRIES_LEFT()) &&
1.244 albertel 573: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
574: $res->duedate($part) > time();
1.115 bowersj2 575: }
576:
577: # Convenience function, so others can use it: Is there only one try remaining for the
578: # part, with more then one try to begin with, not due yet and still can be done?
579: sub lastTry {
580: my $res = shift;
581: my $part = shift;
582:
583: my $tries = $res->tries($part);
584: my $maxtries = $res->maxtries($part);
585: return $tries && $maxtries && $maxtries > 1 &&
1.244 albertel 586: $maxtries - $tries == 1 && $res->duedate($part) &&
587: $res->duedate($part) > time();
1.115 bowersj2 588: }
589:
1.320 albertel 590: # This puts a human-readable name on the env variable.
1.177 www 591:
1.68 bowersj2 592: sub advancedUser {
1.320 albertel 593: return $env{'request.role.adv'};
1.68 bowersj2 594: }
595:
1.73 bowersj2 596:
597: # timeToHumanString takes a time number and converts it to a
598: # human-readable representation, meant to be used in the following
599: # manner:
600: # print "Due $timestring"
601: # print "Open $timestring"
602: # print "Answer available $timestring"
603: # Very, very, very, VERY English-only... goodness help a localizer on
604: # this func...
1.347 ! www 605:
! 606:
1.53 bowersj2 607: sub timeToHumanString {
1.346 foxr 608: my ($time,$type,$format) = @_;
609:
1.58 albertel 610: # zero, '0' and blank are bad times
1.73 bowersj2 611: if (!$time) {
1.229 www 612: return &mt('never');
1.73 bowersj2 613: }
1.231 www 614: unless (&Apache::lonlocal::current_language()=~/^en/) {
1.237 www 615: return &Apache::lonlocal::locallocaltime($time);
1.229 www 616: }
1.73 bowersj2 617: my $now = time();
618:
619: my @time = localtime($time);
620: my @now = localtime($now);
621:
622: # Positive = future
623: my $delta = $time - $now;
624:
625: my $minute = 60;
626: my $hour = 60 * $minute;
627: my $day = 24 * $hour;
628: my $week = 7 * $day;
629: my $inPast = 0;
630:
631: # Logic in comments:
632: # Is it now? (extremely unlikely)
633: if ( $delta == 0 ) {
634: return "this instant";
635: }
636:
637: if ($delta < 0) {
638: $inPast = 1;
639: $delta = -$delta;
640: }
641:
642: if ( $delta > 0 ) {
1.101 bowersj2 643:
1.73 bowersj2 644: my $tense = $inPast ? " ago" : "";
645: my $prefix = $inPast ? "" : "in ";
1.101 bowersj2 646:
647: # Less then a minute
1.73 bowersj2 648: if ( $delta < $minute ) {
649: if ($delta == 1) { return "${prefix}1 second$tense"; }
650: return "$prefix$delta seconds$tense";
651: }
652:
1.101 bowersj2 653: # Less then an hour
1.73 bowersj2 654: if ( $delta < $hour ) {
655: # If so, use minutes
656: my $minutes = floor($delta / 60);
657: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
658: return "$prefix$minutes minutes$tense";
659: }
660:
661: # Is it less then 24 hours away? If so,
662: # display hours + minutes
663: if ( $delta < $hour * 24) {
664: my $hours = floor($delta / $hour);
665: my $minutes = floor(($delta % $hour) / $minute);
666: my $hourString = "$hours hours";
667: my $minuteString = ", $minutes minutes";
668: if ($hours == 1) {
669: $hourString = "1 hour";
670: }
671: if ($minutes == 1) {
672: $minuteString = ", 1 minute";
673: }
674: if ($minutes == 0) {
675: $minuteString = "";
676: }
677: return "$prefix$hourString$minuteString$tense";
678: }
679:
1.346 foxr 680: # If there's a caller supplied format, use it.
681:
682: if($format ne '') {
683: my $timeStr = strftime($format, localtime($time));
1.347 ! www 684: return $timeStr.&Apache::lonlocal::gettimezone();
1.346 foxr 685: }
686:
1.73 bowersj2 687: # Less then 5 days away, display day of the week and
688: # HH:MM
1.346 foxr 689:
1.73 bowersj2 690: if ( $delta < $day * 5 ) {
1.85 bowersj2 691: my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
1.238 albertel 692: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 693: $timeStr =~ s/12:00 pm/noon/;
1.333 albertel 694: return ($inPast ? "last " : "this ") .
1.347 ! www 695: $timeStr.&Apache::lonlocal::gettimezone();
1.73 bowersj2 696: }
697:
1.341 albertel 698: my $conjunction='on';
699: if ($type eq 'start') {
700: $conjunction='at';
701: } elsif ($type eq 'end') {
702: $conjunction='by';
703: }
1.73 bowersj2 704: # Is it this year?
705: if ( $time[5] == $now[5]) {
706: # Return on Month Day, HH:MM meridian
1.341 albertel 707: my $timeStr = strftime("$conjunction %A, %b %e at %I:%M %P", localtime($time));
1.238 albertel 708: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 709: $timeStr =~ s/12:00 pm/noon/;
1.347 ! www 710: return $timeStr.&Apache::lonlocal::gettimezone();
1.73 bowersj2 711: }
712:
713: # Not this year, so show the year
1.341 albertel 714: my $timeStr = strftime("$conjunction %A, %b %e %Y at %I:%M %P", localtime($time));
1.238 albertel 715: $timeStr =~ s/12:00 am/00:00/;
1.73 bowersj2 716: $timeStr =~ s/12:00 pm/noon/;
1.347 ! www 717: return $timeStr.&Apache::lonlocal::gettimezone();
1.58 albertel 718: }
1.53 bowersj2 719: }
720:
1.51 bowersj2 721:
1.133 bowersj2 722: =pod
723:
1.174 albertel 724: =head1 NAME
725:
1.217 bowersj2 726: Apache::lonnavmap - Subroutines to handle and render the navigation
727: maps
1.174 albertel 728:
729: =head1 SYNOPSIS
730:
731: The main handler generates the navigational listing for the course,
732: the other objects export this information in a usable fashion for
1.205 bowersj2 733: other modules.
1.133 bowersj2 734:
1.216 bowersj2 735: =head1 OVERVIEW
736:
1.217 bowersj2 737: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
1.218 bowersj2 738: course structure and caches it in what is often referred to as the
739: "big hash" X<big hash>. You can see it if you are logged into
740: LON-CAPA, in a course, by going to /adm/test. (You may need to
741: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
742: content of the hash will be under the heading "Big Hash".
1.216 bowersj2 743:
744: Big Hash contains, among other things, how resources are related
745: to each other (next/previous), what resources are maps, which
746: resources are being chosen to not show to the student (for random
747: selection), and a lot of other things that can take a lot of time
748: to compute due to the amount of data that needs to be collected and
749: processed.
750:
751: Apache::lonnavmaps provides an object model for manipulating this
752: information in a higher-level fashion then directly manipulating
753: the hash. It also provides access to several auxilary functions
754: that aren't necessarily stored in the Big Hash, but are a per-
755: resource sort of value, like whether there is any feedback on
756: a given resource.
757:
758: Apache::lonnavmaps also abstracts away branching, and someday,
759: conditions, for the times where you don't really care about those
760: things.
761:
762: Apache::lonnavmaps also provides fairly powerful routines for
763: rendering navmaps, and last but not least, provides the navmaps
764: view for when the user clicks the NAV button.
765:
766: B<Note>: Apache::lonnavmaps I<only> works for the "currently
767: logged in user"; if you want things like "due dates for another
768: student" lonnavmaps can not directly retrieve information like
769: that. You need the EXT function. This module can still help,
770: because many things, such as the course structure, are constant
771: between users, and Apache::lonnavmaps can help by providing
772: symbs for the EXT call.
773:
774: The rest of this file will cover the provided rendering routines,
775: which can often be used without fiddling with the navmap object at
776: all, then documents the Apache::lonnavmaps::navmap object, which
777: is the key to accessing the Big Hash information, covers the use
778: of the Iterator (which provides the logic for traversing the
779: somewhat-complicated Big Hash data structure), documents the
780: Apache::lonnavmaps::Resource objects that are returned by
781:
1.205 bowersj2 782: =head1 Subroutine: render
1.133 bowersj2 783:
1.174 albertel 784: The navmap renderer package provides a sophisticated rendering of the
785: standard navigation maps interface into HTML. The provided nav map
786: handler is actually just a glorified call to this.
1.133 bowersj2 787:
1.216 bowersj2 788: Because of the large number of parameters this function accepts,
1.174 albertel 789: instead of passing it arguments as is normal, pass it in an anonymous
1.216 bowersj2 790: hash with the desired options.
1.174 albertel 791:
792: The package provides a function called 'render', called as
1.205 bowersj2 793: Apache::lonnavmaps::render({}).
1.51 bowersj2 794:
1.133 bowersj2 795: =head2 Overview of Columns
1.51 bowersj2 796:
1.174 albertel 797: The renderer will build an HTML table for the navmap and return
798: it. The table is consists of several columns, and a row for each
799: resource (or possibly each part). You tell the renderer how many
800: columns to create and what to place in each column, optionally using
1.205 bowersj2 801: one or more of the prepared columns, and the renderer will assemble
1.174 albertel 802: the table.
803:
804: Any additional generally useful column types should be placed in the
805: renderer code here, so anybody can use it anywhere else. Any code
806: specific to the current application (such as the addition of <input>
807: elements in a column) should be placed in the code of the thing using
808: the renderer.
809:
810: At the core of the renderer is the array reference COLS (see Example
811: section below for how to pass this correctly). The COLS array will
812: consist of entries of one of two types of things: Either an integer
813: representing one of the pre-packaged column types, or a sub reference
814: that takes a resource reference, a part number, and a reference to the
815: argument hash passed to the renderer, and returns a string that will
816: be inserted into the HTML representation as it.
817:
1.216 bowersj2 818: All other parameters are ways of either changing how the columns
819: are printing, or which rows are shown.
820:
1.174 albertel 821: The pre-packaged column names are refered to by constants in the
1.205 bowersj2 822: Apache::lonnavmaps namespace. The following currently exist:
1.51 bowersj2 823:
1.174 albertel 824: =over 4
1.51 bowersj2 825:
1.216 bowersj2 826: =item * B<Apache::lonnavmaps::resource>:
1.51 bowersj2 827:
1.174 albertel 828: The general info about the resource: Link, icon for the type, etc. The
1.216 bowersj2 829: first column in the standard nav map display. This column provides the
830: indentation effect seen in the B<NAV> screen. This column also accepts
1.205 bowersj2 831: the following parameters in the renderer hash:
1.51 bowersj2 832:
1.133 bowersj2 833: =over 4
1.51 bowersj2 834:
1.216 bowersj2 835: =item * B<resource_nolink>: default false
1.51 bowersj2 836:
1.216 bowersj2 837: If true, the resource will not be linked. By default, all non-folder
838: resources are linked.
1.174 albertel 839:
1.216 bowersj2 840: =item * B<resource_part_count>: default true
1.51 bowersj2 841:
1.216 bowersj2 842: If true, the resource will show a part count B<if> the full
843: part list is not displayed. (See "condense_parts" later.) If false,
844: the resource will never show a part count.
1.133 bowersj2 845:
1.174 albertel 846: =item * B<resource_no_folder_link>:
1.133 bowersj2 847:
1.174 albertel 848: If true, the resource's folder will not be clickable to open or close
849: it. Default is false. True implies printCloseAll is false, since you
850: can't close or open folders when this is on anyhow.
1.144 bowersj2 851:
1.133 bowersj2 852: =back
1.51 bowersj2 853:
1.225 bowersj2 854: =item * B<Apache::lonnavmaps::communication_status>:
1.174 albertel 855:
856: Whether there is discussion on the resource, email for the user, or
857: (lumped in here) perl errors in the execution of the problem. This is
858: the second column in the main nav map.
859:
1.225 bowersj2 860: =item * B<Apache::lonnavmaps::quick_status>:
1.51 bowersj2 861:
1.216 bowersj2 862: An icon for the status of a problem, with five possible states:
863: Correct, incorrect, open, awaiting grading (for a problem where the
864: computer's grade is suppressed, or the computer can't grade, like
865: essay problem), or none (not open yet, not a problem). The
1.174 albertel 866: third column of the standard navmap.
1.51 bowersj2 867:
1.225 bowersj2 868: =item * B<Apache::lonnavmaps::long_status>:
1.174 albertel 869:
870: A text readout of the details of the current status of the problem,
871: such as "Due in 22 hours". The fourth column of the standard navmap.
1.51 bowersj2 872:
1.225 bowersj2 873: =item * B<Apache::lonnavmaps::part_status_summary>:
874:
875: A text readout summarizing the status of the problem. If it is a
876: single part problem, will display "Correct", "Incorrect",
877: "Not yet open", "Open", "Attempted", or "Error". If there are
878: multiple parts, this will output a string that in HTML will show a
879: status of how many parts are in each status, in color coding, trying
880: to match the colors of the icons within reason.
881:
882: Note this only makes sense if you are I<not> showing parts. If
883: C<showParts> is true (see below), this column will not output
884: anything.
885:
1.133 bowersj2 886: =back
1.51 bowersj2 887:
1.133 bowersj2 888: If you add any others please be sure to document them here.
1.51 bowersj2 889:
1.174 albertel 890: An example of a column renderer that will show the ID number of a
891: resource, along with the part name if any:
1.51 bowersj2 892:
1.133 bowersj2 893: sub {
894: my ($resource, $part, $params) = @_;
895: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
896: return '<td>' . $resource->{ID} . '</td>';
897: }
1.51 bowersj2 898:
1.174 albertel 899: Note these functions are responsible for the TD tags, which allow them
900: to override vertical and horizontal alignment, etc.
1.130 www 901:
1.133 bowersj2 902: =head2 Parameters
1.115 bowersj2 903:
1.217 bowersj2 904: Minimally, you should be
1.174 albertel 905: able to get away with just using 'cols' (to specify the columns
906: shown), 'url' (necessary for the folders to link to the current screen
907: correctly), and possibly 'queryString' if your app calls for it. In
908: that case, maintaining the state of the folders will be done
909: automatically.
1.140 bowersj2 910:
1.133 bowersj2 911: =over 4
1.51 bowersj2 912:
1.320 albertel 913: =item * B<iterator>: default: constructs one from %env
1.174 albertel 914:
915: A reference to a fresh ::iterator to use from the navmaps. The
916: rendering will reflect the options passed to the iterator, so you can
917: use that to just render a certain part of the course, if you like. If
918: one is not passed, the renderer will attempt to construct one from
1.320 albertel 919: env{'form.filter'} and env{'form.condition'} information, plus the
1.174 albertel 920: 'iterator_map' parameter if any.
921:
1.216 bowersj2 922: =item * B<iterator_map>: default: not used
1.174 albertel 923:
924: If you are letting the renderer do the iterator handling, you can
925: instruct the renderer to render only a particular map by passing it
926: the source of the map you want to process, like
927: '/res/103/jerf/navmap.course.sequence'.
928:
1.320 albertel 929: =item * B<navmap>: default: constructs one from %env
1.174 albertel 930:
931: A reference to a navmap, used only if an iterator is not passed in. If
932: this is necessary to make an iterator but it is not passed in, a new
1.320 albertel 933: one will be constructed based on env info. This is useful to do basic
1.174 albertel 934: error checking before passing it off to render.
935:
1.216 bowersj2 936: =item * B<r>: default: must be passed in
1.174 albertel 937:
938: The standard Apache response object. This must be passed to the
939: renderer or the course hash will be locked.
940:
1.216 bowersj2 941: =item * B<cols>: default: empty (useless)
1.174 albertel 942:
943: An array reference
944:
1.216 bowersj2 945: =item * B<showParts>:default true
1.174 albertel 946:
1.216 bowersj2 947: A flag. If true, a line for the resource itself, and a line
1.174 albertel 948: for each part will be displayed. If not, only one line for each
949: resource will be displayed.
950:
1.216 bowersj2 951: =item * B<condenseParts>: default true
1.174 albertel 952:
1.216 bowersj2 953: A flag. If true, if all parts of the problem have the same
1.174 albertel 954: status and that status is Nothing Set, Correct, or Network Failure,
955: then only one line will be displayed for that resource anyhow. If no,
956: all parts will always be displayed. If showParts is 0, this is
957: ignored.
958:
1.320 albertel 959: =item * B<jumpCount>: default: determined from %env
1.174 albertel 960:
1.216 bowersj2 961: A string identifying the URL to place the anchor 'curloc' at.
962: It is the responsibility of the renderer user to
1.174 albertel 963: ensure that the #curloc is in the URL. By default, determined through
1.320 albertel 964: the use of the env{} 'jump' information, and should normally "just
1.174 albertel 965: work" correctly.
1.144 bowersj2 966:
1.216 bowersj2 967: =item * B<here>: default: empty string
1.140 bowersj2 968:
1.216 bowersj2 969: A Symb identifying where to place the 'here' marker. The empty
970: string means no marker.
1.92 bowersj2 971:
1.216 bowersj2 972: =item * B<indentString>: default: 25 pixel whitespace image
1.164 bowersj2 973:
1.216 bowersj2 974: A string identifying the indentation string to use.
1.92 bowersj2 975:
1.216 bowersj2 976: =item * B<queryString>: default: empty
1.51 bowersj2 977:
1.174 albertel 978: A string which will be prepended to the query string used when the
1.216 bowersj2 979: folders are opened or closed. You can use this to pass
980: application-specific values.
1.55 bowersj2 981:
1.216 bowersj2 982: =item * B<url>: default: none
1.84 bowersj2 983:
1.174 albertel 984: The url the folders will link to, which should be the current
1.216 bowersj2 985: page. Required if the resource info column is shown, and you
986: are allowing the user to open and close folders.
1.115 bowersj2 987:
1.216 bowersj2 988: =item * B<currentJumpIndex>: default: no jumping
1.55 bowersj2 989:
1.174 albertel 990: Describes the currently-open row number to cause the browser to jump
991: to, because the user just opened that folder. By default, pulled from
1.320 albertel 992: the Jump information in the env{'form.*'}.
1.51 bowersj2 993:
1.216 bowersj2 994: =item * B<printKey>: default: false
1.51 bowersj2 995:
1.174 albertel 996: If true, print the key that appears on the top of the standard
1.216 bowersj2 997: navmaps.
1.139 bowersj2 998:
1.216 bowersj2 999: =item * B<printCloseAll>: default: true
1.140 bowersj2 1000:
1.174 albertel 1001: If true, print the "Close all folders" or "open all folders"
1.216 bowersj2 1002: links.
1.140 bowersj2 1003:
1.216 bowersj2 1004: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.153 bowersj2 1005:
1.174 albertel 1006: A function that takes the resource object as its only parameter and
1007: returns a true or false value. If true, the resource is displayed. If
1.216 bowersj2 1008: false, it is simply skipped in the display.
1.174 albertel 1009:
1.216 bowersj2 1010: =item * B<suppressEmptySequences>: default: false
1.190 bowersj2 1011:
1012: If you're using a filter function, and displaying sequences to orient
1013: the user, then frequently some sequences will be empty. Setting this to
1014: true will cause those sequences not to display, so as not to confuse the
1015: user into thinking that if the sequence is there there should be things
1.216 bowersj2 1016: under it; for example, see the "Show Uncompleted Homework" view on the
1017: B<NAV> screen.
1.190 bowersj2 1018:
1.216 bowersj2 1019: =item * B<suppressNavmaps>: default: false
1.174 albertel 1020:
1.216 bowersj2 1021: If true, will not display Navigate Content resources.
1.143 bowersj2 1022:
1.133 bowersj2 1023: =back
1.51 bowersj2 1024:
1.133 bowersj2 1025: =head2 Additional Info
1.51 bowersj2 1026:
1.174 albertel 1027: In addition to the parameters you can pass to the renderer, which will
1028: be passed through unchange to the column renderers, the renderer will
1029: generate the following information which your renderer may find
1030: useful:
1031:
1.216 bowersj2 1032: =over 4
1033:
1034: =item * B<counter>:
1.145 bowersj2 1035:
1.216 bowersj2 1036: Contains the number of rows printed. Useful after calling the render
1037: function, as you can detect whether anything was printed at all.
1038:
1039: =item * B<isNewBranch>:
1040:
1041: Useful for renderers: If this resource is currently the first resource
1042: of a new branch, this will be true. The Resource column (leftmost in the
1043: navmaps screen) uses this to display the "new branch" icon
1.59 bowersj2 1044:
1.133 bowersj2 1045: =back
1.59 bowersj2 1046:
1.133 bowersj2 1047: =cut
1.59 bowersj2 1048:
1.133 bowersj2 1049: sub resource { return 0; }
1050: sub communication_status { return 1; }
1051: sub quick_status { return 2; }
1052: sub long_status { return 3; }
1.225 bowersj2 1053: sub part_status_summary { return 4; }
1.51 bowersj2 1054:
1.133 bowersj2 1055: sub render_resource {
1056: my ($resource, $part, $params) = @_;
1.51 bowersj2 1057:
1.133 bowersj2 1058: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 1059:
1.134 bowersj2 1060: my $link = $params->{"resourceLink"};
1.306 foxr 1061:
1062: # The URL part is not escaped at this point, but the symb is...
1063: # The stuff to the left of the ? must have ' replaced by \' since
1064: # it will be quoted with ' in the href.
1065:
1066: my ($left,$right) = split(/\?/, $link);
1067: $left =~ s/'/\\'/g;
1068: $link = $left.'?'.$right;
1069:
1.134 bowersj2 1070: my $src = $resource->src();
1071: my $it = $params->{"iterator"};
1.133 bowersj2 1072: my $filter = $it->{FILTER};
1073:
1074: my $title = $resource->compTitle();
1.258 albertel 1075:
1.133 bowersj2 1076: my $partLabel = "";
1077: my $newBranchText = "";
1.298 albertel 1078: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
1.133 bowersj2 1079: # If this is a new branch, label it so
1080: if ($params->{'isNewBranch'}) {
1.329 albertel 1081: $newBranchText = "<img src='$location/branch.gif' border='0' alt='Branch' />";
1.51 bowersj2 1082: }
1083:
1.133 bowersj2 1084: # links to open and close the folder
1.306 foxr 1085:
1086:
1.133 bowersj2 1087: my $linkopen = "<a href='$link'>";
1.306 foxr 1088:
1089:
1.133 bowersj2 1090: my $linkclose = "</a>";
1.51 bowersj2 1091:
1.204 albertel 1092: # Default icon: unknown page
1.329 albertel 1093: my $icon = "<img src='$location/unknown.gif' alt='' border='0' alt=' ' ' />";
1.133 bowersj2 1094:
1095: if ($resource->is_problem()) {
1.192 bowersj2 1096: if ($part eq '0' || $params->{'condensed'}) {
1.329 albertel 1097: $icon ='<img src="'.$location.'/problem.gif" alt=" " border="0" />';
1.133 bowersj2 1098: } else {
1099: $icon = $params->{'indentString'};
1100: }
1.204 albertel 1101: } else {
1.329 albertel 1102: $icon = "<img src='".&Apache::loncommon::icon($resource->src)."' alt=' ' border='0' />";
1.133 bowersj2 1103: }
1.51 bowersj2 1104:
1.133 bowersj2 1105: # Display the correct map icon to open or shut map
1106: if ($resource->is_map()) {
1107: my $mapId = $resource->map_pc();
1108: my $nowOpen = !defined($filter->{$mapId});
1109: if ($it->{CONDITION}) {
1110: $nowOpen = !$nowOpen;
1111: }
1.144 bowersj2 1112:
1.205 bowersj2 1113: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1114:
1.144 bowersj2 1115: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 1116: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.329 albertel 1117: $icon = "<img src='$location/$icon' alt='".
1118: ($nowOpen ? 'Open Folder' : 'Close Folder')."' border='0' />";
1.144 bowersj2 1119:
1120: $linkopen = "<a href='" . $params->{'url'} . '?' .
1121: $params->{'queryString'} . '&filter=';
1122: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
1123: addToFilter($filter, $mapId) :
1124: removeFromFilter($filter, $mapId);
1125: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
1126: . $params->{'hereType'} . '&here=' .
1127: &Apache::lonnet::escape($params->{'here'}) .
1.159 bowersj2 1128: '&jump=' .
1.144 bowersj2 1129: &Apache::lonnet::escape($resource->symb()) .
1130: "&folderManip=1'>";
1.306 foxr 1131:
1.144 bowersj2 1132: } else {
1133: # Don't allow users to manipulate folder
1.205 bowersj2 1134: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
1.144 bowersj2 1135: '.nomanip.gif';
1.329 albertel 1136: $icon = "<img src='$location/$icon' alt='".
1137: ($nowOpen ? 'Open Folder' : 'Close Folder')."' border='0' />";
1.144 bowersj2 1138:
1139: $linkopen = "";
1140: $linkclose = "";
1141: }
1.133 bowersj2 1142: }
1.51 bowersj2 1143:
1.133 bowersj2 1144: if ($resource->randomout()) {
1145: $nonLinkedText .= ' <i>(hidden)</i> ';
1146: }
1.342 albertel 1147: if (!$resource->condval()) {
1148: $nonLinkedText .= ' <i>(conditionally hidden)</i> ';
1149: }
1.133 bowersj2 1150:
1151: # We're done preparing and finally ready to start the rendering
1152: my $result = "<td align='left' valign='center'>";
1.140 bowersj2 1153:
1154: my $indentLevel = $params->{'indentLevel'};
1155: if ($newBranchText) { $indentLevel--; }
1156:
1.133 bowersj2 1157: # print indentation
1.140 bowersj2 1158: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 1159: $result .= $params->{'indentString'};
1.84 bowersj2 1160: }
1161:
1.133 bowersj2 1162: # Decide what to display
1.306 foxr 1163:
1.133 bowersj2 1164: $result .= "$newBranchText$linkopen$icon$linkclose";
1165:
1166: my $curMarkerBegin = '';
1167: my $curMarkerEnd = '';
1.51 bowersj2 1168:
1.133 bowersj2 1169: # Is this the current resource?
1.158 bowersj2 1170: if (!$params->{'displayedHereMarker'} &&
1171: $resource->symb() eq $params->{'here'} ) {
1.345 www 1172: $curMarkerBegin = '<font color="red" size="+2">></font>';
1.133 bowersj2 1173: $curMarkerEnd = '<font color="red" size="+2"><</font>';
1.158 bowersj2 1174: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 1175: }
1176:
1.192 bowersj2 1177: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 1178: !$params->{'condensed'}) {
1.274 matthew 1179: my $displaypart=$resource->part_display($part);
1.245 www 1180: $partLabel = " (Part: $displaypart)";
1.309 albertel 1181: if ($link!~/\#/) { $link.='#'.&Apache::lonnet::escape($part); }
1.133 bowersj2 1182: $title = "";
1.51 bowersj2 1183: }
1184:
1.163 bowersj2 1185: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.133 bowersj2 1186: $nonLinkedText .= ' (' . $resource->countParts() . ' parts)';
1.51 bowersj2 1187: }
1188:
1.268 albertel 1189: my $target;
1.320 albertel 1190: if ($env{'environment.remotenavmap'} eq 'on') {
1.268 albertel 1191: $target=' target="loncapaclient" ';
1192: }
1.266 raeburn 1193: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.268 albertel 1194: $result .= " $curMarkerBegin<a $target href='$link'>$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
1.144 bowersj2 1195: } else {
1196: $result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
1197: }
1.51 bowersj2 1198:
1.133 bowersj2 1199: return $result;
1200: }
1.51 bowersj2 1201:
1.133 bowersj2 1202: sub render_communication_status {
1203: my ($resource, $part, $params) = @_;
1.134 bowersj2 1204: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1205:
1206: my $link = $params->{"resourceLink"};
1.335 albertel 1207: my $target;
1208: if ($env{'environment.remotenavmap'} eq 'on') {
1209: $target=' target="loncapaclient" ';
1210: }
1211: my $linkopen = "<a $target href='$link'>";
1.134 bowersj2 1212: my $linkclose = "</a>";
1.298 albertel 1213: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.134 bowersj2 1214: if ($resource->hasDiscussion()) {
1215: $discussionHTML = $linkopen .
1.298 albertel 1216: '<img border="0" src="'.$location.'/chat.gif" />' .
1.134 bowersj2 1217: $linkclose;
1218: }
1219:
1220: if ($resource->getFeedback()) {
1221: my $feedback = $resource->getFeedback();
1222: foreach (split(/\,/, $feedback)) {
1223: if ($_) {
1.335 albertel 1224: $feedbackHTML .= ' <a '.$target.' href="/adm/email?display='
1.134 bowersj2 1225: . &Apache::lonnet::escape($_) . '">'
1.298 albertel 1226: . '<img src="'.$location.'/feedback.gif" '
1.134 bowersj2 1227: . 'border="0" /></a>';
1228: }
1229: }
1230: }
1231:
1232: if ($resource->getErrors()) {
1233: my $errors = $resource->getErrors();
1.254 matthew 1234: my $errorcount = 0;
1.134 bowersj2 1235: foreach (split(/,/, $errors)) {
1.254 matthew 1236: last if ($errorcount>=10); # Only output 10 bombs maximum
1.134 bowersj2 1237: if ($_) {
1.254 matthew 1238: $errorcount++;
1.335 albertel 1239: $errorHTML .= ' <a '.$target.' href="/adm/email?display='
1.134 bowersj2 1240: . &Apache::lonnet::escape($_) . '">'
1.298 albertel 1241: . '<img src="'.$location.'/bomb.gif" '
1.134 bowersj2 1242: . 'border="0" /></a>';
1243: }
1244: }
1.197 bowersj2 1245: }
1246:
1247: if ($params->{'multipart'} && $part != '0') {
1248: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 1249: }
1250:
1251: return "<td width=\"75\" align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML$errorHTML </td>";
1252:
1.133 bowersj2 1253: }
1254: sub render_quick_status {
1255: my ($resource, $part, $params) = @_;
1.135 bowersj2 1256: my $result = "";
1257: my $firstDisplayed = !$params->{'condensed'} &&
1258: $params->{'multipart'} && $part eq "0";
1259:
1260: my $link = $params->{"resourceLink"};
1.335 albertel 1261: my $target;
1262: if ($env{'environment.remotenavmap'} eq 'on') {
1263: $target=' target="loncapaclient" ';
1264: }
1265: my $linkopen = "<a $target href='$link'>";
1.135 bowersj2 1266: my $linkclose = "</a>";
1267:
1268: if ($resource->is_problem() &&
1269: !$firstDisplayed) {
1.224 bowersj2 1270:
1271: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 1272: my $alt = $iconAltTags{$icon};
1273: if ($icon) {
1.298 albertel 1274: my $location=
1275: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1276: $result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";
1.135 bowersj2 1277: } else {
1278: $result .= "<td width='30'> </td>\n";
1279: }
1280: } else { # not problem, no icon
1281: $result .= "<td width='30'> </td>\n";
1282: }
1283:
1284: return $result;
1.133 bowersj2 1285: }
1286: sub render_long_status {
1287: my ($resource, $part, $params) = @_;
1.136 bowersj2 1288: my $result = "<td align='right' valign='center'>\n";
1289: my $firstDisplayed = !$params->{'condensed'} &&
1290: $params->{'multipart'} && $part eq "0";
1291:
1292: my $color;
1.212 bowersj2 1293: if ($resource->is_problem()) {
1.136 bowersj2 1294: $color = $colormap{$resource->status};
1295:
1.252 matthew 1296: if (dueInLessThan24Hours($resource, $part) ||
1.136 bowersj2 1297: lastTry($resource, $part)) {
1298: $color = $hurryUpColor;
1299: }
1300: }
1301:
1302: if ($resource->kind() eq "res" &&
1303: $resource->is_problem() &&
1304: !$firstDisplayed) {
1305: if ($color) {$result .= "<font color=\"$color\"><b>"; }
1306: $result .= getDescription($resource, $part);
1307: if ($color) {$result .= "</b></font>"; }
1308: }
1309: if ($resource->is_map() && advancedUser() && $resource->randompick()) {
1310: $result .= '(randomly select ' . $resource->randompick() .')';
1311: }
1.210 bowersj2 1312:
1.213 bowersj2 1313: # Debugging code
1314: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1315: # ' - Part: ' . $part;
1316:
1.210 bowersj2 1317: $result .= "</td>\n";
1.136 bowersj2 1318:
1319: return $result;
1.51 bowersj2 1320: }
1321:
1.227 bowersj2 1322: # Colors obtained by taking the icons, matching the colors, and
1323: # possibly reducing the Value (HSV) of the color, if it's too bright
1324: # for text, generally by one third or so.
1.225 bowersj2 1325: my %statusColors =
1326: (
1327: $resObj->CLOSED => '#000000',
1.227 bowersj2 1328: $resObj->OPEN => '#998b13',
1329: $resObj->CORRECT => '#26933f',
1330: $resObj->INCORRECT => '#c48207',
1331: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1332: $resObj->ERROR => '#000000'
1333: );
1334: my %statusStrings =
1335: (
1336: $resObj->CLOSED => 'Not yet open',
1337: $resObj->OPEN => 'Open',
1338: $resObj->CORRECT => 'Correct',
1339: $resObj->INCORRECT => 'Incorrect',
1340: $resObj->ATTEMPTED => 'Attempted',
1341: $resObj->ERROR => 'Network Error'
1342: );
1343: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1344:
1345: use Data::Dumper;
1346: sub render_parts_summary_status {
1347: my ($resource, $part, $params) = @_;
1.256 albertel 1348: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1349: if ($params->{showParts}) {
1350: return '<td></td>';
1351: }
1352:
1353: my $td = "<td align='right'>\n";
1354: my $endtd = "</td>\n";
1.256 albertel 1355: my @probs;
1.225 bowersj2 1356:
1.256 albertel 1357: if ($resource->contains_problem) {
1358: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1359: } else {
1360: @probs=($resource);
1361: }
1362: my $return;
1363: my %overallstatus;
1364: my $totalParts;
1365: foreach my $resource (@probs) {
1366: # If there is a single part, just show the simple status
1367: if ($resource->singlepart()) {
1368: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1369: $overallstatus{$status}++;
1370: $totalParts++;
1371: next;
1372: }
1373: # Now we can be sure the $part doesn't really matter.
1374: my $statusCount = $resource->simpleStatusCount();
1375: my @counts;
1376: foreach my $status (@statuses) {
1377: # decouple display order from the simpleStatusCount order
1378: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1379: if ($statusCount->[$slot]) {
1380: $overallstatus{$status}+=$statusCount->[$slot];
1381: $totalParts+=$statusCount->[$slot];
1382: }
1383: }
1384: }
1385: $return.= $td . $totalParts . ' parts: ';
1386: foreach my $status (@statuses) {
1387: if ($overallstatus{$status}) {
1388: $return.="<font color='" . $statusColors{$status} .
1389: "'>" . $overallstatus{$status} . ' '
1.225 bowersj2 1390: . $statusStrings{$status} . "</font>";
1391: }
1392: }
1.256 albertel 1393: $return.= $endtd;
1394: return $return;
1.225 bowersj2 1395: }
1396:
1.133 bowersj2 1397: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1398: \&render_quick_status, \&render_long_status,
1399: \&render_parts_summary_status);
1.132 bowersj2 1400:
1401: sub setDefault {
1402: my ($val, $default) = @_;
1403: if (!defined($val)) { return $default; }
1404: return $val;
1405: }
1406:
1.296 albertel 1407: sub cmp_title {
1408: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1409: $atitle=~s/^\s*//;
1410: $btitle=~s/^\s*//;
1411: return $atitle cmp $btitle;
1412: }
1413:
1.132 bowersj2 1414: sub render {
1415: my $args = shift;
1.140 bowersj2 1416: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1417: my $result = '';
1.132 bowersj2 1418: # Configure the renderer.
1419: my $cols = $args->{'cols'};
1420: if (!defined($cols)) {
1421: # no columns, no nav maps.
1422: return '';
1423: }
1.140 bowersj2 1424: my $navmap;
1425: if (defined($args->{'navmap'})) {
1426: $navmap = $args->{'navmap'};
1427: }
1428:
1.158 bowersj2 1429: my $r = $args->{'r'};
1.140 bowersj2 1430: my $queryString = $args->{'queryString'};
1.159 bowersj2 1431: my $jump = $args->{'jump'};
1.158 bowersj2 1432: my $here = $args->{'here'};
1.153 bowersj2 1433: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1434: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1435: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1436: # before the current resource when using #current
1437:
1438: # If we were passed 'here' information, we are not rendering
1439: # after a folder manipulation, and we were not passed an
1440: # iterator, make sure we open the folders to show the "here"
1441: # marker
1442: my $filterHash = {};
1443: # Figure out what we're not displaying
1.320 albertel 1444: foreach (split(/\,/, $env{"form.filter"})) {
1.140 bowersj2 1445: if ($_) {
1446: $filterHash->{$_} = "1";
1447: }
1448: }
1449:
1.191 bowersj2 1450: # Filter: Remember filter function and add our own filter: Refuse
1451: # to show hidden resources unless the user can see them.
1452: my $userCanSeeHidden = advancedUser();
1453: my $filterFunc = setDefault($args->{'filterFunc'},
1454: sub {return 1;});
1455: if (!$userCanSeeHidden) {
1456: # Without renaming the filterfunc, the server seems to go into
1457: # an infinite loop
1458: my $oldFilterFunc = $filterFunc;
1459: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1460: &$oldFilterFunc($res);};
1461: }
1462:
1.140 bowersj2 1463: my $condition = 0;
1.320 albertel 1464: if ($env{'form.condition'}) {
1.140 bowersj2 1465: $condition = 1;
1466: }
1467:
1.320 albertel 1468: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1.140 bowersj2 1469: # Step 1: Check to see if we have a navmap
1470: if (!defined($navmap)) {
1.221 bowersj2 1471: $navmap = Apache::lonnavmaps::navmap->new();
1.340 albertel 1472: if (!defined($navmap)) {
1473: # no londer in course
1474: return '<font color="red">No course selected</font><br />
1475: <a href="/adm/roles">Select a course</a><br />';
1476: }
1477: }
1.140 bowersj2 1478:
1479: # Step two: Locate what kind of here marker is necessary
1480: # Determine where the "here" marker is and where the screen jumps to.
1481:
1.332 albertel 1482: if ($env{'form.postsymb'} ne '') {
1.320 albertel 1483: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1.332 albertel 1484: } elsif ($env{'form.postdata'} ne '') {
1.140 bowersj2 1485: # couldn't find a symb, is there a URL?
1.320 albertel 1486: my $currenturl = $env{'form.postdata'};
1.158 bowersj2 1487: #$currenturl=~s/^http\:\/\///;
1488: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1489:
1.158 bowersj2 1490: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.331 albertel 1491: }
1492: if ($here eq '') {
1.317 albertel 1493: my $last;
1.320 albertel 1494: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1.317 albertel 1495: &GDBM_READER(),0640)) {
1496: $last=$hash{'last_known'};
1497: untie(%hash);
1498: }
1499: if ($last) { $here = $jump = $last; }
1500: }
1.158 bowersj2 1501:
1.140 bowersj2 1502: # Step three: Ensure the folders are open
1503: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1504: my $curRes;
1.140 bowersj2 1505: my $found = 0;
1506:
1507: # We only need to do this if we need to open the maps to show the
1508: # current position. This will change the counter so we can't count
1509: # for the jump marker with this loop.
1.294 albertel 1510: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1511: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1512: my $mapStack = $mapIterator->getStack();
1513:
1514: # Ensure the parent maps are open
1515: for my $map (@{$mapStack}) {
1516: if ($condition) {
1517: undef $filterHash->{$map->map_pc()};
1518: } else {
1519: $filterHash->{$map->map_pc()} = 1;
1520: }
1521: }
1522: $found = 1;
1523: }
1524: }
1.159 bowersj2 1525: }
1.140 bowersj2 1526:
1.320 albertel 1527: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1.140 bowersj2 1528: # If this is a click on a folder or something, we want to preserve the "here"
1529: # from the querystring, and get the new "jump" marker
1.320 albertel 1530: $here = $env{'form.here'};
1531: $jump = $env{'form.jump'};
1.140 bowersj2 1532: }
1533:
1.132 bowersj2 1534: my $it = $args->{'iterator'};
1535: if (!defined($it)) {
1.320 albertel 1536: # Construct a default iterator based on $env{'form.'} information
1.140 bowersj2 1537:
1538: # Step 1: Check to see if we have a navmap
1539: if (!defined($navmap)) {
1.221 bowersj2 1540: $navmap = Apache::lonnavmaps::navmap->new();
1.140 bowersj2 1541: }
1542:
1.144 bowersj2 1543: # See if we're being passed a specific map
1544: if ($args->{'iterator_map'}) {
1545: my $map = $args->{'iterator_map'};
1.145 bowersj2 1546: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1547: my $firstResource = $map->map_start();
1548: my $finishResource = $map->map_finish();
1549:
1550: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1551: } else {
1552: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);
1553: }
1.132 bowersj2 1554: }
1.256 albertel 1555:
1.159 bowersj2 1556: # (re-)Locate the jump point, if any
1.191 bowersj2 1557: # Note this does not take filtering or hidden into account... need
1558: # to be fixed?
1.159 bowersj2 1559: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1560: my $curRes;
1.159 bowersj2 1561: my $foundJump = 0;
1562: my $counter = 0;
1563:
1.222 bowersj2 1564: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1565: if (ref($curRes)) { $counter++; }
1566:
1567: if (ref($curRes) && $jump eq $curRes->symb()) {
1568:
1569: # This is why we have to use the main iterator instead of the
1570: # potentially faster DFS: The count has to be the same, so
1571: # the order has to be the same, which DFS won't give us.
1572: $args->{'currentJumpIndex'} = $counter;
1573: $foundJump = 1;
1574: }
1575: }
1576:
1.132 bowersj2 1577: my $showParts = setDefault($args->{'showParts'}, 1);
1578: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1579: # keeps track of when the current resource is found,
1580: # so we can back up a few and put the anchor above the
1581: # current resource
1.140 bowersj2 1582: my $printKey = $args->{'printKey'};
1583: my $printCloseAll = $args->{'printCloseAll'};
1584: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.298 albertel 1585:
1.140 bowersj2 1586: # Print key?
1587: if ($printKey) {
1588: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1589: my $date=localtime;
1590: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1.298 albertel 1591: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.140 bowersj2 1592: if ($navmap->{LAST_CHECK}) {
1593: $result .=
1.298 albertel 1594: '<img src="'.$location.'/chat.gif"> '.&mt('New discussion since').' '.
1.140 bowersj2 1595: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1596: '</td><td align="center" valign="bottom"> '.
1.298 albertel 1597: '<img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1598: '</td>';
1599: } else {
1600: $result .= '<td align="center" valign="bottom"> '.
1.298 albertel 1601: '<img src="'.$location.'/chat.gif"> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1602: ' <img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').
1.140 bowersj2 1603: '</td>';
1604: }
1605:
1606: $result .= '</tr></table>';
1607: }
1608:
1.172 bowersj2 1609: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1610: my ($link,$text);
1.140 bowersj2 1611: if ($condition) {
1.281 albertel 1612: $link='"navmaps?condition=0&filter=&'.$queryString.
1613: '&here='.&Apache::lonnet::escape($here).'"';
1614: $text='Close All Folders';
1.140 bowersj2 1615: } else {
1.281 albertel 1616: $link='"navmaps?condition=1&filter=&'.$queryString.
1617: '&here='.&Apache::lonnet::escape($here).'"';
1618: $text='Open All Folders';
1619: }
1620: if ($args->{'caller'} eq 'navmapsdisplay') {
1621: &add_linkitem($args->{'linkitems'},'changefolder',
1622: 'location.href='.$link,$text);
1623: } else {
1624: $result.='<a href='.$link.'>'.&mt($text).'</a>';
1625: }
1.266 raeburn 1626: $result .= "\n";
1627: }
1.140 bowersj2 1628:
1.266 raeburn 1629: # Check for any unread discussions in all resources.
1.281 albertel 1630: if ($args->{'caller'} eq 'navmapsdisplay') {
1.296 albertel 1631: &add_linkitem($args->{'linkitems'},'clearbubbles',
1632: 'document.clearbubbles.submit()',
1633: 'Mark all posts read');
1.297 albertel 1634: my $time=time;
1.296 albertel 1635: $result .= (<<END);
1636: <form name="clearbubbles" method="post" action="/adm/feedback">
1637: <input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
1.297 albertel 1638: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1639: END
1640: if ($args->{'sort'} eq 'discussion') {
1641: my $totdisc = 0;
1642: my $haveDisc = '';
1643: my @allres=$navmap->retrieveResources();
1644: foreach my $resource (@allres) {
1645: if ($resource->hasDiscussion()) {
1.323 albertel 1646: $haveDisc .= $resource->wrap_symb().':';
1.296 albertel 1647: $totdisc ++;
1.267 albertel 1648: }
1649: }
1.296 albertel 1650: if ($totdisc > 0) {
1651: $haveDisc =~ s/:$//;
1652: $result .= (<<END);
1653: <input type="hidden" name="navmaps" value="$haveDisc" />
1654: </form>
1655: END
1656: }
1.297 albertel 1657: }
1658: $result.='</form>';
1.266 raeburn 1659: }
1.276 albertel 1660:
1.281 albertel 1661: if ($args->{'caller'} eq 'navmapsdisplay') {
1.283 raeburn 1662: $result .= '<table><tr><td>'.
1663: &Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT').'</td>';
1.320 albertel 1664: if ($env{'environment.remotenavmap'} ne 'on') {
1.283 raeburn 1665: $result .= '<td> </td>';
1666: } else {
1667: $result .= '</tr><tr>';
1668: }
1.281 albertel 1669: $result.=&show_linkitems($args->{'linkitems'});
1670: if ($args->{'sort_html'}) {
1.320 albertel 1671: if ($env{'environment.remotenavmap'} ne 'on') {
1.281 albertel 1672: $result.='<td> </td><td> </td><td> </td>'.
1673: '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
1674: } else {
1675: $result.='</tr><tr><td align="left"><br />'.
1676: $args->{'sort_html'}.'</td></tr>';
1677: }
1678: }
1679: $result .= '</table>';
1680: } elsif ($args->{'sort_html'}) {
1681: $result.=$args->{'sort_html'};
1682: }
1.276 albertel 1683:
1.266 raeburn 1684: $result .= "<br />\n";
1.140 bowersj2 1685: if ($r) {
1686: $r->print($result);
1687: $r->rflush();
1688: $result = "";
1689: }
1.132 bowersj2 1690: # End parameter setting
1.133 bowersj2 1691:
1.132 bowersj2 1692: # Data
1.140 bowersj2 1693: $result .= '<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n";
1.132 bowersj2 1694: my $res = "Apache::lonnavmaps::resource";
1695: my %condenseStatuses =
1696: ( $res->NETWORK_FAILURE => 1,
1697: $res->NOTHING_SET => 1,
1698: $res->CORRECT => 1 );
1699: my @backgroundColors = ("#FFFFFF", "#F6F6F6");
1.133 bowersj2 1700:
1701: # Shared variables
1702: $args->{'counter'} = 0; # counts the rows
1703: $args->{'indentLevel'} = 0;
1704: $args->{'isNewBranch'} = 0;
1705: $args->{'condensed'} = 0;
1.298 albertel 1706: my $location=
1707: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace1.gif");
1.329 albertel 1708: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' width='25' height='1' alt=' ' border='0' />");
1.133 bowersj2 1709: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1710:
1.190 bowersj2 1711: # If we're suppressing empty sequences, look for them here. Use DFS for speed,
1712: # since structure actually doesn't matter, except what map has what resources.
1713: if ($args->{'suppressEmptySequences'}) {
1714: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1715: $it->{FIRST_RESOURCE},
1716: $it->{FINISH_RESOURCE},
1717: {}, undef, 1);
1.222 bowersj2 1718: my $depth = 0;
1.190 bowersj2 1719: $dfsit->next();
1720: my $curRes = $dfsit->next();
1721: while ($depth > -1) {
1722: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1723: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1724:
1725: if (ref($curRes)) {
1726: # Parallel pre-processing: Do sequences have non-filtered-out children?
1.201 bowersj2 1727: if ($curRes->is_map()) {
1.190 bowersj2 1728: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1729: # Sequences themselves do not count as visible children,
1730: # unless those sequences also have visible children.
1731: # This means if a sequence appears, there's a "promise"
1732: # that there's something under it if you open it, somewhere.
1733: } else {
1734: # Not a sequence: if it's filtered, ignore it, otherwise
1735: # rise up the stack and mark the sequences as having children
1736: if (&$filterFunc($curRes)) {
1737: for my $sequence (@{$dfsit->getStack()}) {
1738: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1739: }
1740: }
1741: }
1742: }
1743: } continue {
1744: $curRes = $dfsit->next();
1745: }
1746: }
1747:
1.133 bowersj2 1748: my $displayedJumpMarker = 0;
1.132 bowersj2 1749: # Set up iteration.
1750: my $now = time();
1751: my $in24Hours = $now + 24 * 60 * 60;
1752: my $rownum = 0;
1753:
1.141 bowersj2 1754: # export "here" marker information
1755: $args->{'here'} = $here;
1756:
1.222 bowersj2 1757: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1758: my @resources;
1759: my $code='';# sub { !(shift->is_map();) };
1760: if ($args->{'sort'} eq 'title') {
1.276 albertel 1761: my $oldFilterFunc = $filterFunc;
1762: my $filterFunc=
1763: sub {
1764: my ($res)=@_;
1765: if ($res->is_map()) { return 0;}
1766: return &$oldFilterFunc($res);
1767: };
1768: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1769: @resources= sort { &cmp_title($a,$b) } @resources;
1770: } elsif ($args->{'sort'} eq 'duedate') {
1771: my $oldFilterFunc = $filterFunc;
1772: my $filterFunc=
1773: sub {
1774: my ($res)=@_;
1775: if (!$res->is_problem()) { return 0;}
1776: return &$oldFilterFunc($res);
1777: };
1778: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1779: @resources= sort {
1.270 albertel 1780: if ($a->duedate ne $b->duedate) {
1781: return $a->duedate cmp $b->duedate;
1782: }
1.296 albertel 1783: my $value=&cmp_title($a,$b);
1784: return $value;
1.270 albertel 1785: } @resources;
1.296 albertel 1786: } elsif ($args->{'sort'} eq 'discussion') {
1787: my $oldFilterFunc = $filterFunc;
1788: my $filterFunc=
1789: sub {
1790: my ($res)=@_;
1791: if (!$res->hasDiscussion() &&
1792: !$res->getFeedback() &&
1793: !$res->getErrors()) { return 0;}
1794: return &$oldFilterFunc($res);
1795: };
1796: @resources=$navmap->retrieveResources(undef,$filterFunc);
1797: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1798: } else {
1799: #unknow sort mechanism or default
1800: undef($args->{'sort'});
1.270 albertel 1801: }
1802:
1.276 albertel 1803:
1.270 albertel 1804: while (1) {
1805: if ($args->{'sort'}) {
1806: $curRes = shift(@resources);
1807: } else {
1808: $curRes = $it->next($closeAllPages);
1809: }
1810: if (!$curRes) { last; }
1811:
1.132 bowersj2 1812: # Maintain indentation level.
1813: if ($curRes == $it->BEGIN_MAP() ||
1814: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1815: $args->{'indentLevel'}++;
1.132 bowersj2 1816: }
1817: if ($curRes == $it->END_MAP() ||
1818: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1819: $args->{'indentLevel'}--;
1.132 bowersj2 1820: }
1821: # Notice new branches
1822: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1823: $args->{'isNewBranch'} = 1;
1824: }
1825:
1826: # If this isn't an actual resource, continue on
1827: if (!ref($curRes)) {
1828: next;
1.132 bowersj2 1829: }
1.133 bowersj2 1830:
1.143 bowersj2 1831: # If this has been filtered out, continue on
1832: if (!(&$filterFunc($curRes))) {
1833: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1834: next;
1835: }
1.132 bowersj2 1836:
1.190 bowersj2 1837: # If this is an empty sequence and we're filtering them, continue on
1.201 bowersj2 1838: if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&
1.190 bowersj2 1839: !$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {
1840: next;
1841: }
1842:
1.153 bowersj2 1843: # If we're suppressing navmaps and this is a navmap, continue on
1844: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1845: next;
1846: }
1847:
1.191 bowersj2 1848: $args->{'counter'}++;
1849:
1.132 bowersj2 1850: # Does it have multiple parts?
1.133 bowersj2 1851: $args->{'multipart'} = 0;
1852: $args->{'condensed'} = 0;
1.132 bowersj2 1853: my @parts;
1854:
1855: # Decide what parts to show.
1.133 bowersj2 1856: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1857: @parts = @{$curRes->parts()};
1.192 bowersj2 1858: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1859:
1860: if ($condenseParts) { # do the condensation
1.133 bowersj2 1861: if (!$args->{'condensed'}) {
1.132 bowersj2 1862: # Decide whether to condense based on similarity
1.192 bowersj2 1863: my $status = $curRes->status($parts[0]);
1864: my $due = $curRes->duedate($parts[0]);
1865: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1866: my $statusAllSame = 1;
1867: my $dueAllSame = 1;
1868: my $openAllSame = 1;
1.192 bowersj2 1869: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1870: if ($curRes->status($parts[$i]) != $status){
1871: $statusAllSame = 0;
1872: }
1873: if ($curRes->duedate($parts[$i]) != $due ) {
1874: $dueAllSame = 0;
1875: }
1876: if ($curRes->opendate($parts[$i]) != $open) {
1877: $openAllSame = 0;
1878: }
1879: }
1880: # $*allSame is true if all the statuses were
1881: # the same. Now, if they are all the same and
1882: # match one of the statuses to condense, or they
1883: # are all open with the same due date, or they are
1884: # all OPEN_LATER with the same open date, display the
1885: # status of the first non-zero part (to get the 'correct'
1886: # status right, since 0 is never 'correct' or 'open').
1887: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1888: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1889: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1890: @parts = ($parts[0]);
1.133 bowersj2 1891: $args->{'condensed'} = 1;
1.132 bowersj2 1892: }
1893: }
1.198 bowersj2 1894: # Multipart problem with one part: always "condense" (happens
1895: # to match the desirable behavior)
1896: if ($curRes->countParts() == 1) {
1897: @parts = ($parts[0]);
1898: $args->{'condensed'} = 1;
1899: }
1.132 bowersj2 1900: }
1.157 bowersj2 1901: }
1.132 bowersj2 1902:
1903: # If the multipart problem was condensed, "forget" it was multipart
1904: if (scalar(@parts) == 1) {
1.133 bowersj2 1905: $args->{'multipart'} = 0;
1.192 bowersj2 1906: } else {
1907: # Add part 0 so we display it correctly.
1908: unshift @parts, '0';
1.132 bowersj2 1909: }
1.310 albertel 1910:
1911: {
1912: my ($src,$symb,$anchor,$stack);
1913: if ($args->{'sort'}) {
1914: my $it = $navmap->getIterator(undef, undef, undef, 1);
1915: while ( my $res=$it->next()) {
1916: if (ref($res) &&
1917: $res->symb() eq $curRes->symb()) { last; }
1918: }
1919: $stack=$it->getStack();
1920: } else {
1921: $stack=$it->getStack();
1922: }
1923: ($src,$symb,$anchor)=getLinkForResource($stack);
1924: if (defined($anchor)) { $anchor='#'.$anchor; }
1925: my $srcHasQuestion = $src =~ /\?/;
1926: $args->{"resourceLink"} = $src.
1927: ($srcHasQuestion?'&':'?') .
1928: 'symb=' . &Apache::lonnet::escape($symb).$anchor;
1929: }
1.132 bowersj2 1930: # Now, we've decided what parts to show. Loop through them and
1931: # show them.
1.192 bowersj2 1932: foreach my $part (@parts) {
1.132 bowersj2 1933: $rownum ++;
1934: my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];
1935:
1936: $result .= " <tr bgcolor='$backgroundColor'>\n";
1.134 bowersj2 1937:
1938: # Set up some data about the parts that the cols might want
1939: my $filter = $it->{FILTER};
1.270 albertel 1940:
1.132 bowersj2 1941: # Now, display each column.
1942: foreach my $col (@$cols) {
1.139 bowersj2 1943: my $colHTML = '';
1944: if (ref($col)) {
1945: $colHTML .= &$col($curRes, $part, $args);
1946: } else {
1947: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1948: }
1.132 bowersj2 1949:
1.133 bowersj2 1950: # If this is the first column and it's time to print
1951: # the anchor, do so
1952: if ($col == $cols->[0] &&
1953: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1954: $currentJumpDelta) {
1955: # Jam the anchor after the <td> tag;
1956: # necessary for valid HTML (which Mozilla requires)
1957: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1958: $displayedJumpMarker = 1;
1959: }
1.139 bowersj2 1960: $result .= $colHTML . "\n";
1.132 bowersj2 1961: }
1.139 bowersj2 1962: $result .= " </tr>\n";
1.140 bowersj2 1963: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1964: }
1.153 bowersj2 1965:
1.139 bowersj2 1966: if ($r && $rownum % 20 == 0) {
1967: $r->print($result);
1968: $result = "";
1969: $r->rflush();
1.132 bowersj2 1970: }
1.156 bowersj2 1971: } continue {
1.208 bowersj2 1972: if ($r) {
1973: # If we have the connection, make sure the user is still connected
1974: my $c = $r->connection;
1975: if ($c->aborted()) {
1976: # Who cares what we do, nobody will see it anyhow.
1977: return '';
1978: }
1979: }
1.132 bowersj2 1980: }
1981:
1.134 bowersj2 1982: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1983: # delay needed because the browser is processing the jump before
1984: # it finishes rendering, so it goes to the wrong place!
1985: # onload might be better, but this routine has no access to that.
1986: # On mozilla, the 0-millisecond timeout seems to prevent this;
1987: # it's quite likely this might fix other browsers, too, and
1988: # certainly won't hurt anything.
1.139 bowersj2 1989: if ($displayedJumpMarker) {
1.247 albertel 1990: $result .= "
1991: <script>
1992: if (location.href.indexOf('#curloc')==-1) {
1993: setTimeout(\"location += '#curloc';\", 0)
1994: }
1995: </script>";
1.134 bowersj2 1996: }
1997:
1.132 bowersj2 1998: $result .= "</table>";
1.140 bowersj2 1999:
2000: if ($r) {
2001: $r->print($result);
2002: $result = "";
2003: $r->rflush();
2004: }
2005:
1.132 bowersj2 2006: return $result;
2007: }
2008:
1.281 albertel 2009: sub add_linkitem {
2010: my ($linkitems,$name,$cmd,$text)=@_;
2011: $$linkitems{$name}{'cmd'}=$cmd;
2012: $$linkitems{$name}{'text'}=&mt($text);
2013: }
2014:
2015: sub show_linkitems {
2016: my ($linkitems)=@_;
1.312 albertel 2017: my @linkorder = ("blank","launchnav","closenav","firsthomework",
2018: "everything","uncompleted","changefolder","clearbubbles");
1.281 albertel 2019:
2020: my $result .= (<<ENDBLOCK);
1.283 raeburn 2021: <td align="left">
1.281 albertel 2022: <script type="text/javascript">
2023: function changeNavDisplay () {
2024: var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
2025: ENDBLOCK
2026: foreach my $link (@linkorder) {
2027: $result.= "if (navchoice == '$link') {".
2028: $linkitems->{$link}{'cmd'}."}\n";
2029: }
2030: $result.='}
2031: </script>
2032: <form name="linkitems" method="post">
2033: <nobr><select name="toplink">'."\n";
2034: foreach my $link (@linkorder) {
2035: if (defined($linkitems->{$link})) {
2036: if ($linkitems->{$link}{'text'} ne '') {
2037: $result .= ' <option value="'.$link.'">'.
2038: $linkitems->{$link}{'text'}."</option>\n";
2039: }
2040: }
2041: }
2042: $result .= '</select> <input type="button" name="chgnav"
2043: value="Go" onClick="javascript:changeNavDisplay()" />
2044: </nobr></form></td>'."\n";
1.298 albertel 2045:
1.281 albertel 2046: return $result;
2047: }
2048:
1.133 bowersj2 2049: 1;
2050:
2051: package Apache::lonnavmaps::navmap;
2052:
2053: =pod
2054:
1.216 bowersj2 2055: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 2056:
1.217 bowersj2 2057: =head2 Overview
1.133 bowersj2 2058:
1.217 bowersj2 2059: The navmap object's job is to provide access to the resources
2060: in the course as Apache::lonnavmaps::resource objects, and to
2061: query and manage the relationship between those resource objects.
2062:
2063: Generally, you'll use the navmap object in one of three basic ways.
2064: In order of increasing complexity and power:
2065:
2066: =over 4
2067:
2068: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb>, B<Url> or B<MapPc>. This provides
2069: various ways to obtain resource objects, based on various identifiers.
2070: Use this when you want to request information about one object or
2071: a handful of resources you already know the identities of, from some
2072: other source. For more about Ids, Symbs, and MapPcs, see the
2073: Resource documentation. Note that Url should be a B<last resort>,
2074: not your first choice; it only works when there is only one
2075: instance of the resource in the course, which only applies to
2076: maps, and even that may change in the future.
2077:
2078: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
2079: retrieves resources matching some criterion and returns them
2080: in a flat array, with no structure information. Use this when
2081: you are manipulating a series of resources, based on what map
2082: the are in, but do not care about branching, or exactly how
2083: the maps and resources are related. This is the most common case.
2084:
2085: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
2086: the course's navmap in various ways without writing the traversal
2087: code yourself. See iterator documentation below. Use this when
2088: you need to know absolutely everything about the course, including
2089: branches and the precise relationship between maps and resources.
2090:
2091: =back
2092:
2093: =head2 Creation And Destruction
2094:
2095: To create a navmap object, use the following function:
1.133 bowersj2 2096:
2097: =over 4
2098:
1.221 bowersj2 2099: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 2100:
1.221 bowersj2 2101: Creates a new navmap object. Returns the navmap object if this is
2102: successful, or B<undef> if not.
1.174 albertel 2103:
1.216 bowersj2 2104: =back
2105:
2106: =head2 Methods
2107:
2108: =over 4
2109:
1.174 albertel 2110: =item * B<getIterator>(first, finish, filter, condition):
2111:
2112: See iterator documentation below.
1.133 bowersj2 2113:
2114: =cut
2115:
2116: use strict;
2117: use GDBM_File;
1.320 albertel 2118: use Apache::lonnet;
1.133 bowersj2 2119:
2120: sub new {
2121: # magic invocation to create a class instance
2122: my $proto = shift;
2123: my $class = ref($proto) || $proto;
2124: my $self = {};
2125:
2126: # Resource cache stores navmap resources as we reference them. We generate
2127: # them on-demand so we don't pay for creating resources unless we use them.
2128: $self->{RESOURCE_CACHE} = {};
2129:
2130: # Network failure flag, if we accessed the course or user opt and
2131: # failed
2132: $self->{NETWORK_FAILURE} = 0;
2133:
2134: # tie the nav hash
2135:
1.168 bowersj2 2136: my %navmaphash;
2137: my %parmhash;
1.320 albertel 2138: my $courseFn = $env{"request.course.fn"};
1.220 bowersj2 2139: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
1.133 bowersj2 2140: &GDBM_READER(), 0640))) {
2141: return undef;
2142: }
2143:
1.220 bowersj2 2144: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
1.133 bowersj2 2145: &GDBM_READER(), 0640)))
2146: {
1.170 matthew 2147: untie %{$self->{PARM_HASH}};
1.133 bowersj2 2148: return undef;
2149: }
2150:
1.199 bowersj2 2151: $self->{NAV_HASH} = \%navmaphash;
1.168 bowersj2 2152: $self->{PARM_HASH} = \%parmhash;
1.221 bowersj2 2153: $self->{PARM_CACHE} = {};
1.133 bowersj2 2154:
2155: bless($self);
2156:
2157: return $self;
2158: }
2159:
1.221 bowersj2 2160: sub generate_course_user_opt {
1.133 bowersj2 2161: my $self = shift;
1.221 bowersj2 2162: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 2163:
1.320 albertel 2164: my $uname=$env{'user.name'};
2165: my $udom=$env{'user.domain'};
2166: my $cid=$env{'request.course.id'};
1.326 albertel 2167: my $cdom=$env{'course.'.$cid.'.domain'};
2168: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2169:
1.133 bowersj2 2170: # ------------------------------------------------- Get coursedata (if present)
1.326 albertel 2171: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2172: # Check for network failure
2173: if (!ref($courseopt)) {
2174: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
1.324 albertel 2175: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2176: }
1.326 albertel 2177: undef($courseopt);
2178: }
1.325 albertel 2179:
1.133 bowersj2 2180: # --------------------------------------------------- Get userdata (if present)
1.325 albertel 2181:
1.326 albertel 2182: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2183: # Check for network failure
2184: if (!ref($useropt)) {
2185: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
1.324 albertel 2186: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2187: }
1.326 albertel 2188: undef($useropt);
1.221 bowersj2 2189: }
2190:
1.326 albertel 2191: $self->{COURSE_OPT} = $courseopt;
2192: $self->{USER_OPT} = $useropt;
2193:
1.221 bowersj2 2194: $self->{COURSE_USER_OPT_GENERATED} = 1;
2195:
2196: return;
2197: }
2198:
2199: sub generate_email_discuss_status {
2200: my $self = shift;
1.259 raeburn 2201: my $symb = shift;
1.221 bowersj2 2202: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 2203:
1.320 albertel 2204: my $cid=$env{'request.course.id'};
1.326 albertel 2205: my $cdom=$env{'course.'.$cid.'.domain'};
2206: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2207:
2208: my %emailstatus = &Apache::lonnet::dump('email_status');
2209: my $logoutTime = $emailstatus{'logout'};
1.320 albertel 2210: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
1.221 bowersj2 2211: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2212: $courseLeaveTime : $logoutTime);
2213: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2214: $cdom, $cnum);
1.259 raeburn 2215: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
1.320 albertel 2216: $env{'user.domain'},$env{'user.name'},'lastread');
1.259 raeburn 2217: my %lastreadtime = ();
2218: foreach (keys %lastread) {
2219: my $key = $_;
2220: $key =~ s/_lastread$//;
2221: $lastreadtime{$key} = $lastread{$_};
2222: }
2223:
1.221 bowersj2 2224: my %feedback=();
2225: my %error=();
1.325 albertel 2226: my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},
2227: $env{'user.name'});
1.221 bowersj2 2228:
1.325 albertel 2229: foreach my $msgid (@keys) {
1.295 albertel 2230: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
2231: my $plain=
2232: &Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
2233: if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
2234: my ($what,$url)=($1,$2);
1.221 bowersj2 2235: if ($what eq 'Error') {
2236: $error{$url}.=','.$msgid;
2237: } else {
2238: $feedback{$url}.=','.$msgid;
2239: }
2240: }
2241: }
1.211 bowersj2 2242: }
1.221 bowersj2 2243:
1.295 albertel 2244: #url's of resources that have feedbacks
1.221 bowersj2 2245: $self->{FEEDBACK} = \%feedback;
1.295 albertel 2246: #or errors
2247: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 2248: $self->{DISCUSSION_TIME} = \%discussiontime;
2249: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 2250: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 2251:
2252: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2253: }
2254:
2255: sub get_user_data {
2256: my $self = shift;
2257: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 2258:
1.221 bowersj2 2259: # Retrieve performance data on problems
1.320 albertel 2260: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
2261: $env{'user.domain'},
2262: $env{'user.name'});
1.221 bowersj2 2263: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 2264:
1.221 bowersj2 2265: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 2266: }
2267:
2268: # Internal function: Takes a key to look up in the nav hash and implements internal
2269: # memory caching of that key.
2270: sub navhash {
2271: my $self = shift; my $key = shift;
2272: return $self->{NAV_HASH}->{$key};
2273: }
2274:
1.217 bowersj2 2275: =pod
2276:
2277: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2278: false otherwise. Undefined course maps indicate an error somewhere in
2279: LON-CAPA, and you will not be able to proceed with using the navmap.
2280: See the B<NAV> screen for an example of using this.
2281:
2282: =cut
2283:
1.133 bowersj2 2284: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2285: sub courseMapDefined {
2286: my $self = shift;
1.320 albertel 2287: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
1.133 bowersj2 2288:
2289: my $firstres = $self->navhash("map_start_$uri");
2290: my $lastres = $self->navhash("map_finish_$uri");
2291: return $firstres && $lastres;
2292: }
2293:
2294: sub getIterator {
2295: my $self = shift;
2296: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.314 albertel 2297: shift, undef, shift,
2298: shift, shift);
1.133 bowersj2 2299: return $iterator;
2300: }
2301:
2302: # Private method: Does the given resource (as a symb string) have
2303: # current discussion? Returns 0 if chat/mail data not extracted.
2304: sub hasDiscussion {
2305: my $self = shift;
2306: my $symb = shift;
1.221 bowersj2 2307: $self->generate_email_discuss_status();
2308:
1.133 bowersj2 2309: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2310:
2311: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2312:
1.323 albertel 2313: # backward compatibility (bulletin boards used to be 'wrapped')
2314: my $ressymb = $self->wrap_symb($symb);
1.259 raeburn 2315: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2316: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2317: } else {
1.266 raeburn 2318: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2319: 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 2320: }
1.133 bowersj2 2321: }
2322:
1.321 raeburn 2323: sub wrap_symb {
1.322 albertel 2324: my $self = shift;
1.321 raeburn 2325: my $symb = shift;
1.322 albertel 2326: if ($symb =~ m-___(adm/\w+/\w+/)(\d+)(/bulletinboard)$-) {
2327: unless ($symb =~ m|adm/wrapper/adm|) {
2328: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
1.321 raeburn 2329: }
2330: }
1.322 albertel 2331: return $symb;
1.321 raeburn 2332: }
2333:
1.322 albertel 2334: # Private method: Does the given resource (as a symb string) have
2335: # current feedback? Returns the string in the feedback hash, which
2336: # will be false if it does not exist.
2337:
1.133 bowersj2 2338: sub getFeedback {
2339: my $self = shift;
2340: my $symb = shift;
2341:
1.221 bowersj2 2342: $self->generate_email_discuss_status();
2343:
1.133 bowersj2 2344: if (!defined($self->{FEEDBACK})) { return ""; }
2345:
2346: return $self->{FEEDBACK}->{$symb};
2347: }
2348:
2349: # Private method: Get the errors for that resource (by source).
2350: sub getErrors {
2351: my $self = shift;
2352: my $src = shift;
1.221 bowersj2 2353:
2354: $self->generate_email_discuss_status();
2355:
1.133 bowersj2 2356: if (!defined($self->{ERROR_MSG})) { return ""; }
2357: return $self->{ERROR_MSG}->{$src};
2358: }
2359:
2360: =pod
2361:
1.174 albertel 2362: =item * B<getById>(id):
2363:
2364: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2365: object for that resource. This method, or other methods that use it
2366: (as in the resource object) is the only proper way to obtain a
2367: resource object.
1.133 bowersj2 2368:
1.194 bowersj2 2369: =item * B<getBySymb>(symb):
2370:
2371: Based on the symb of the resource, get a resource object for that
2372: resource. This is one of the proper ways to get a resource object.
2373:
2374: =item * B<getMapByMapPc>(map_pc):
2375:
2376: Based on the map_pc of the resource, get a resource object for
2377: the given map. This is one of the proper ways to get a resource object.
2378:
1.133 bowersj2 2379: =cut
2380:
2381: # The strategy here is to cache the resource objects, and only construct them
2382: # as we use them. The real point is to prevent reading any more from the tied
2383: # hash then we have to, which should hopefully alleviate speed problems.
2384:
2385: sub getById {
2386: my $self = shift;
2387: my $id = shift;
2388:
2389: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2390: {
2391: return $self->{RESOURCE_CACHE}->{$id};
2392: }
2393:
2394: # resource handles inserting itself into cache.
2395: # Not clear why the quotes are necessary, but as of this
2396: # writing it doesn't work without them.
2397: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2398: }
1.133 bowersj2 2399:
1.172 bowersj2 2400: sub getBySymb {
2401: my $self = shift;
2402: my $symb = shift;
1.277 matthew 2403:
1.228 albertel 2404: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2405: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2406: my $returnvalue = undef;
2407: if (ref($map)) {
2408: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2409: }
2410: return $returnvalue;
1.194 bowersj2 2411: }
2412:
2413: sub getByMapPc {
2414: my $self = shift;
2415: my $map_pc = shift;
2416: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2417: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2418: return $self->getById($map_id);
1.172 bowersj2 2419: }
2420:
1.133 bowersj2 2421: =pod
2422:
1.174 albertel 2423: =item * B<firstResource>():
2424:
2425: Returns a resource object reference corresponding to the first
2426: resource in the navmap.
1.133 bowersj2 2427:
2428: =cut
2429:
2430: sub firstResource {
2431: my $self = shift;
2432: my $firstResource = $self->navhash('map_start_' .
1.320 albertel 2433: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2434: return $self->getById($firstResource);
1.132 bowersj2 2435: }
1.133 bowersj2 2436:
2437: =pod
2438:
1.174 albertel 2439: =item * B<finishResource>():
2440:
2441: Returns a resource object reference corresponding to the last resource
2442: in the navmap.
1.133 bowersj2 2443:
2444: =cut
2445:
2446: sub finishResource {
2447: my $self = shift;
2448: my $firstResource = $self->navhash('map_finish_' .
1.320 albertel 2449: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2450: return $self->getById($firstResource);
1.132 bowersj2 2451: }
1.133 bowersj2 2452:
2453: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2454: # the actual lookup; parmval caches the results.
2455: sub parmval {
2456: my $self = shift;
2457: my ($what,$symb)=@_;
2458: my $hashkey = $what."|||".$symb;
2459:
2460: if (defined($self->{PARM_CACHE}->{$hashkey})) {
2461: return $self->{PARM_CACHE}->{$hashkey};
2462: }
2463:
2464: my $result = $self->parmval_real($what, $symb);
2465: $self->{PARM_CACHE}->{$hashkey} = $result;
2466: return $result;
1.132 bowersj2 2467: }
2468:
1.133 bowersj2 2469: sub parmval_real {
2470: my $self = shift;
1.219 albertel 2471: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2472:
1.221 bowersj2 2473: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2474: $self->generate_course_user_opt();
2475:
1.320 albertel 2476: my $cid=$env{'request.course.id'};
2477: my $csec=$env{'request.course.sec'};
2478: my $uname=$env{'user.name'};
2479: my $udom=$env{'user.domain'};
1.133 bowersj2 2480:
2481: unless ($symb) { return ''; }
2482: my $result='';
2483:
1.226 www 2484: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.133 bowersj2 2485:
2486: # ----------------------------------------------------- Cascading lookup scheme
2487: my $rwhat=$what;
2488: $what=~s/^parameter\_//;
2489: $what=~s/\_/\./;
2490:
2491: my $symbparm=$symb.'.'.$what;
2492: my $mapparm=$mapname.'___(all).'.$what;
1.325 albertel 2493: my $usercourseprefix=$cid;
1.133 bowersj2 2494:
2495: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2496: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2497: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2498:
2499: my $courselevel= $usercourseprefix.'.'.$what;
2500: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2501: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2502:
2503: my $useropt = $self->{USER_OPT};
2504: my $courseopt = $self->{COURSE_OPT};
2505: my $parmhash = $self->{PARM_HASH};
2506:
2507: # ---------------------------------------------------------- first, check user
2508: if ($uname and defined($useropt)) {
2509: if (defined($$useropt{$courselevelr})) { return $$useropt{$courselevelr}; }
2510: if (defined($$useropt{$courselevelm})) { return $$useropt{$courselevelm}; }
2511: if (defined($$useropt{$courselevel})) { return $$useropt{$courselevel}; }
2512: }
2513:
2514: # ------------------------------------------------------- second, check course
2515: if ($csec and defined($courseopt)) {
2516: if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
2517: if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
2518: if (defined($$courseopt{$seclevel})) { return $$courseopt{$seclevel}; }
2519: }
2520:
2521: if (defined($courseopt)) {
2522: if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
2523: }
2524:
2525: # ----------------------------------------------------- third, check map parms
2526:
2527: my $thisparm=$$parmhash{$symbparm};
2528: if (defined($thisparm)) { return $thisparm; }
2529:
2530: # ----------------------------------------------------- fourth , check default
2531:
1.246 albertel 2532: my $meta_rwhat=$rwhat;
2533: $meta_rwhat=~s/\./_/g;
2534: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
2535: if (defined($default)) { return $default}
2536: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.133 bowersj2 2537: if (defined($default)) { return $default}
2538:
1.315 albertel 2539: # --------------------------------------------------- fifth, check more course
2540: if (defined($courseopt)) {
2541: if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
2542: if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
2543: }
2544:
2545: # --------------------------------------------------- sixth , cascade up parts
1.133 bowersj2 2546:
2547: my ($space,@qualifier)=split(/\./,$rwhat);
2548: my $qualifier=join('.',@qualifier);
2549: unless ($space eq '0') {
1.160 albertel 2550: my @parts=split(/_/,$space);
2551: my $id=pop(@parts);
2552: my $part=join('_',@parts);
2553: if ($part eq '') { $part='0'; }
1.219 albertel 2554: my $partgeneral=$self->parmval($part.".$qualifier",$symb,1);
1.160 albertel 2555: if (defined($partgeneral)) { return $partgeneral; }
1.133 bowersj2 2556: }
1.219 albertel 2557: if ($recurse) { return undef; }
2558: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);
2559: if (defined($pack_def)) { return $pack_def; }
1.133 bowersj2 2560: return '';
1.145 bowersj2 2561: }
2562:
1.174 albertel 2563: =pod
1.145 bowersj2 2564:
1.174 albertel 2565: =item * B<getResourceByUrl>(url):
1.145 bowersj2 2566:
1.174 albertel 2567: Retrieves a resource object by URL of the resource. If passed a
2568: resource object, it will simply return it, so it is safe to use this
2569: method in code like "$res = $navmap->getResourceByUrl($res)", if
2570: you're not sure if $res is already an object, or just a URL. If the
2571: resource appears multiple times in the course, only the first instance
2572: will be returned. As a result, this is probably useful only for maps.
2573:
1.314 albertel 2574: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall):
1.174 albertel 2575:
2576: The map is a specification of a map to retreive the resources from,
2577: either as a url or as an object. The filterFunc is a reference to a
2578: function that takes a resource object as its one argument and returns
2579: true if the resource should be included, or false if it should not
2580: be. If recursive is true, the map will be recursively examined,
2581: otherwise it will not be. If bailout is true, the function will return
1.314 albertel 2582: as soon as it finds a resource, if false it will finish. If showall is
2583: true it will not hide maps that contain nothing but one other map. By
2584: default, the map is the top-level map of the course, filterFunc is a
2585: function that always returns 1, recursive is true, bailout is false,
2586: showall is false. The resources will be returned in a list containing
2587: the resource objects for the corresponding resources, with B<no
2588: structure information> in the list; regardless of branching,
2589: recursion, etc., it will be a flat list.
1.174 albertel 2590:
2591: Thus, this is suitable for cases where you don't want the structure,
2592: just a list of all resources. It is also suitable for finding out how
2593: many resources match a given description; for this use, if all you
2594: want to know is if I<any> resources match the description, the bailout
2595: parameter will allow you to avoid potentially expensive enumeration of
2596: all matching resources.
1.145 bowersj2 2597:
1.318 albertel 2598: =item * B<hasResource>(map, filterFunc, recursive, showall):
1.145 bowersj2 2599:
1.174 albertel 2600: Convience method for
1.146 bowersj2 2601:
1.318 albertel 2602: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
1.146 bowersj2 2603:
1.174 albertel 2604: which will tell whether the map has resources matching the description
2605: in the filter function.
1.146 bowersj2 2606:
1.145 bowersj2 2607: =cut
2608:
1.277 matthew 2609:
1.145 bowersj2 2610: sub getResourceByUrl {
2611: my $self = shift;
2612: my $resUrl = shift;
2613:
2614: if (ref($resUrl)) { return $resUrl; }
2615:
2616: $resUrl = &Apache::lonnet::clutter($resUrl);
2617: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
2618: if ($resId =~ /,/) {
2619: $resId = (split (/,/, $resId))[0];
2620: }
2621: if (!$resId) { return ''; }
2622: return $self->getById($resId);
2623: }
2624:
2625: sub retrieveResources {
2626: my $self = shift;
2627: my $map = shift;
2628: my $filterFunc = shift;
2629: if (!defined ($filterFunc)) {
2630: $filterFunc = sub {return 1;};
2631: }
2632: my $recursive = shift;
2633: if (!defined($recursive)) { $recursive = 1; }
2634: my $bailout = shift;
2635: if (!defined($bailout)) { $bailout = 0; }
1.314 albertel 2636: my $showall = shift;
1.145 bowersj2 2637: # Create the necessary iterator.
2638: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 2639: $map = $self->getResourceByUrl($map);
1.145 bowersj2 2640: }
2641:
1.213 bowersj2 2642: # If nothing was passed, assume top-level map
2643: if (!$map) {
2644: $map = $self->getById('0.0');
2645: }
2646:
1.145 bowersj2 2647: # Check the map's validity.
1.213 bowersj2 2648: if (!$map->is_map()) {
1.145 bowersj2 2649: # Oh, to throw an exception.... how I'd love that!
2650: return ();
2651: }
2652:
1.146 bowersj2 2653: # Get an iterator.
2654: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.314 albertel 2655: undef, $recursive, $showall);
1.146 bowersj2 2656:
2657: my @resources = ();
2658:
2659: # Run down the iterator and collect the resources.
1.222 bowersj2 2660: my $curRes;
2661:
2662: while ($curRes = $it->next()) {
1.146 bowersj2 2663: if (ref($curRes)) {
2664: if (!&$filterFunc($curRes)) {
2665: next;
2666: }
2667:
2668: push @resources, $curRes;
2669:
2670: if ($bailout) {
2671: return @resources;
2672: }
2673: }
2674:
2675: }
2676:
2677: return @resources;
2678: }
2679:
2680: sub hasResource {
2681: my $self = shift;
2682: my $map = shift;
2683: my $filterFunc = shift;
2684: my $recursive = shift;
1.318 albertel 2685: my $showall = shift;
1.146 bowersj2 2686:
1.318 albertel 2687: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
1.133 bowersj2 2688: }
1.51 bowersj2 2689:
2690: 1;
2691:
2692: package Apache::lonnavmaps::iterator;
1.300 albertel 2693: use WeakRef;
1.320 albertel 2694: use Apache::lonnet;
2695:
1.51 bowersj2 2696: =pod
2697:
2698: =back
2699:
1.174 albertel 2700: =head1 Object: navmap Iterator
1.51 bowersj2 2701:
1.174 albertel 2702: An I<iterator> encapsulates the logic required to traverse a data
2703: structure. navmap uses an iterator to traverse the course map
2704: according to the criteria you wish to use.
2705:
2706: To obtain an iterator, call the B<getIterator>() function of a
2707: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
2708: directly.) This will return a reference to the iterator:
1.51 bowersj2 2709:
2710: C<my $resourceIterator = $navmap-E<gt>getIterator();>
2711:
2712: To get the next thing from the iterator, call B<next>:
2713:
2714: C<my $nextThing = $resourceIterator-E<gt>next()>
2715:
2716: getIterator behaves as follows:
2717:
2718: =over 4
2719:
1.174 albertel 2720: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
2721:
2722: All parameters are optional. firstResource is a resource reference
2723: corresponding to where the iterator should start. It defaults to
2724: navmap->firstResource() for the corresponding nav map. finishResource
2725: corresponds to where you want the iterator to end, defaulting to
2726: navmap->finishResource(). filterHash is a hash used as a set
2727: containing strings representing the resource IDs, defaulting to
2728: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 2729: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 2730: recursed on. If it is a 1, only resources NOT in the filterHash will
2731: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
2732: false (default), the iterator will only return the first level of map
2733: that is not just a single, 'redirecting' map. If true, the iterator
2734: will return all information, starting with the top-level map,
2735: regardless of content. returnTopMap, if true (default false), will
2736: cause the iterator to return the top-level map object (resource 0.0)
2737: before anything else.
2738:
2739: Thus, by default, only top-level resources will be shown. Change the
2740: condition to a 1 without changing the hash, and all resources will be
2741: shown. Changing the condition to 1 and including some values in the
2742: hash will allow you to selectively suppress parts of the navmap, while
2743: leaving it on 0 and adding things to the hash will allow you to
2744: selectively add parts of the nav map. See the handler code for
2745: examples.
2746:
2747: The iterator will return either a reference to a resource object, or a
2748: token representing something in the map, such as the beginning of a
2749: new branch. The possible tokens are:
2750:
2751: =over 4
1.51 bowersj2 2752:
1.222 bowersj2 2753: =item * B<END_ITERATOR>:
2754:
2755: The iterator has returned all that it's going to. Further calls to the
2756: iterator will just produce more of these. This is a "false" value, and
2757: is the only false value the iterator which will be returned, so it can
2758: be used as a loop sentinel.
2759:
1.217 bowersj2 2760: =item * B<BEGIN_MAP>:
1.51 bowersj2 2761:
1.174 albertel 2762: A new map is being recursed into. This is returned I<after> the map
2763: resource itself is returned.
1.51 bowersj2 2764:
1.217 bowersj2 2765: =item * B<END_MAP>:
1.174 albertel 2766:
2767: The map is now done.
1.51 bowersj2 2768:
1.217 bowersj2 2769: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 2770:
1.174 albertel 2771: A branch is now starting. The next resource returned will be the first
2772: in that branch.
1.70 bowersj2 2773:
1.217 bowersj2 2774: =item * B<END_BRANCH>:
1.70 bowersj2 2775:
1.174 albertel 2776: The branch is now done.
1.51 bowersj2 2777:
2778: =back
2779:
1.174 albertel 2780: The tokens are retreivable via methods on the iterator object, i.e.,
2781: $iterator->END_MAP.
1.70 bowersj2 2782:
1.174 albertel 2783: Maps can contain empty resources. The iterator will automatically skip
2784: over such resources, but will still treat the structure
2785: correctly. Thus, a complicated map with several branches, but
2786: consisting entirely of empty resources except for one beginning or
2787: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
2788: but only one resource will be returned.
1.116 bowersj2 2789:
1.242 matthew 2790: =back
2791:
1.222 bowersj2 2792: =head2 Normal Usage
2793:
2794: Normal usage of the iterator object is to do the following:
2795:
2796: my $it = $navmap->getIterator([your params here]);
2797: my $curRes;
2798: while ($curRes = $it->next()) {
2799: [your logic here]
2800: }
2801:
2802: Note that inside of the loop, it's frequently useful to check if
2803: "$curRes" is a reference or not with the reference function; only
2804: resource objects will be references, and any non-references will
2805: be the tokens described above.
2806:
2807: Also note there is some old code floating around that trys to track
2808: the depth of the iterator to see when it's done; do not copy that
2809: code. It is difficult to get right and harder to understand then
2810: this. They should be migrated to this new style.
1.51 bowersj2 2811:
2812: =cut
2813:
2814: # Here are the tokens for the iterator:
2815:
1.222 bowersj2 2816: sub END_ITERATOR { return 0; }
1.51 bowersj2 2817: sub BEGIN_MAP { return 1; } # begining of a new map
2818: sub END_MAP { return 2; } # end of the map
2819: sub BEGIN_BRANCH { return 3; } # beginning of a branch
2820: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 2821: sub FORWARD { return 1; } # go forward
2822: sub BACKWARD { return 2; }
1.51 bowersj2 2823:
1.96 bowersj2 2824: sub min {
2825: (my $a, my $b) = @_;
2826: if ($a < $b) { return $a; } else { return $b; }
2827: }
2828:
1.94 bowersj2 2829: sub new {
2830: # magic invocation to create a class instance
2831: my $proto = shift;
2832: my $class = ref($proto) || $proto;
2833: my $self = {};
2834:
1.300 albertel 2835: weaken($self->{NAV_MAP} = shift);
1.94 bowersj2 2836: return undef unless ($self->{NAV_MAP});
2837:
2838: # Handle the parameters
2839: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
2840: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
2841:
2842: # If the given resources are just the ID of the resource, get the
2843: # objects
2844: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
2845: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
2846: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
2847: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
2848:
2849: $self->{FILTER} = shift;
2850:
2851: # A hash, used as a set, of resource already seen
2852: $self->{ALREADY_SEEN} = shift;
2853: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
2854: $self->{CONDITION} = shift;
2855:
1.116 bowersj2 2856: # Do we want to automatically follow "redirection" maps?
2857: $self->{FORCE_TOP} = shift;
2858:
1.162 bowersj2 2859: # Do we want to return the top-level map object (resource 0.0)?
2860: $self->{RETURN_0} = shift;
2861: # have we done that yet?
2862: $self->{HAVE_RETURNED_0} = 0;
2863:
1.94 bowersj2 2864: # Now, we need to pre-process the map, by walking forward and backward
2865: # over the parts of the map we're going to look at.
1.96 bowersj2 2866:
1.97 bowersj2 2867: # The processing steps are exactly the same, except for a few small
2868: # changes, so I bundle those up in the following list of two elements:
2869: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
2870: # first_resource).
2871: # This prevents writing nearly-identical code twice.
2872: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
2873: 'FIRST_RESOURCE'],
2874: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
2875: 'FINISH_RESOURCE'] );
2876:
1.98 bowersj2 2877: my $maxDepth = 0; # tracks max depth
2878:
1.116 bowersj2 2879: # If there is only one resource in this map, and it's a map, we
2880: # want to remember that, so the user can ask for the first map
2881: # that isn't just a redirector.
2882: my $resource; my $resourceCount = 0;
2883:
1.209 bowersj2 2884: # Documentation on this algorithm can be found in the CVS repository at
2885: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
2886: # in that file.
1.107 bowersj2 2887: # **1**
2888:
1.97 bowersj2 2889: foreach my $pass (@iterations) {
2890: my $direction = $pass->[0];
2891: my $valName = $pass->[1];
2892: my $nextResourceMethod = $pass->[2];
2893: my $firstResourceName = $pass->[3];
2894:
2895: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
2896: $self->{FIRST_RESOURCE},
2897: $self->{FINISH_RESOURCE},
2898: {}, undef, 0, $direction);
1.96 bowersj2 2899:
1.97 bowersj2 2900: # prime the recursion
2901: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 2902: $iterator->next();
1.97 bowersj2 2903: my $curRes = $iterator->next();
1.222 bowersj2 2904: my $depth = 1;
2905: while ($depth > 0) {
2906: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
2907: if ($curRes == $iterator->END_MAP()) { $depth--; }
2908:
1.97 bowersj2 2909: if (ref($curRes)) {
1.116 bowersj2 2910: # If there's only one resource, this will save it
1.117 bowersj2 2911: # we have to filter empty resources from consideration here,
2912: # or even "empty", redirecting maps have two (start & finish)
2913: # or three (start, finish, plus redirector)
2914: if($direction == FORWARD && $curRes->src()) {
2915: $resource = $curRes; $resourceCount++;
2916: }
1.97 bowersj2 2917: my $resultingVal = $curRes->{DATA}->{$valName};
2918: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 2919: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 2920:
1.116 bowersj2 2921: if ($nextCount == 1) { # **3**
1.97 bowersj2 2922: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
2923: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
2924: }
2925:
1.116 bowersj2 2926: if ($nextCount > 1) { # **4**
1.97 bowersj2 2927: foreach my $res (@{$nextResources}) {
2928: my $current = $res->{DATA}->{$valName} || 999999999;
2929: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
2930: }
2931: }
2932: }
1.96 bowersj2 2933:
1.107 bowersj2 2934: # Assign the final val (**2**)
1.97 bowersj2 2935: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 2936: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
2937: $curRes->{DATA}->{BOT_UP_VAL});
2938:
2939: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
2940: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 2941: }
1.222 bowersj2 2942:
2943: $curRes = $iterator->next();
1.96 bowersj2 2944: }
2945: }
1.94 bowersj2 2946:
1.116 bowersj2 2947: # Check: Was this only one resource, a map?
1.255 albertel 2948: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 2949: my $firstResource = $resource->map_start();
2950: my $finishResource = $resource->map_finish();
2951: return
2952: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
2953: $finishResource, $self->{FILTER},
2954: $self->{ALREADY_SEEN},
1.314 albertel 2955: $self->{CONDITION},
2956: $self->{FORCE_TOP});
1.116 bowersj2 2957:
2958: }
2959:
1.98 bowersj2 2960: # Set up some bookkeeping information.
2961: $self->{CURRENT_DEPTH} = 0;
2962: $self->{MAX_DEPTH} = $maxDepth;
2963: $self->{STACK} = [];
2964: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 2965: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 2966:
2967: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
2968: push @{$self->{STACK}}, [];
2969: }
2970:
1.107 bowersj2 2971: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 2972: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
2973: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
2974:
2975: bless ($self);
2976:
2977: return $self;
2978: }
2979:
2980: sub next {
2981: my $self = shift;
1.256 albertel 2982: my $closeAllPages=shift;
1.222 bowersj2 2983: if ($self->{FINISHED}) {
2984: return END_ITERATOR();
2985: }
2986:
1.162 bowersj2 2987: # If we want to return the top-level map object, and haven't yet,
2988: # do so.
2989: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
2990: $self->{HAVE_RETURNED_0} = 1;
2991: return $self->{NAV_MAP}->getById('0.0');
2992: }
1.98 bowersj2 2993:
2994: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
2995: # grab the next from the recursive iterator
1.256 albertel 2996: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 2997:
2998: # is it a begin or end map? If so, update the depth
2999: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3000: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3001:
3002: # Are we back at depth 0? If so, stop recursing
3003: if ($self->{RECURSIVE_DEPTH} == 0) {
3004: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3005: }
3006:
3007: return $next;
3008: }
3009:
3010: if (defined($self->{FORCE_NEXT})) {
3011: my $tmp = $self->{FORCE_NEXT};
3012: $self->{FORCE_NEXT} = undef;
3013: return $tmp;
3014: }
3015:
3016: # Have we not yet begun? If not, return BEGIN_MAP and
3017: # remember we've started.
3018: if ( !$self->{STARTED} ) {
3019: $self->{STARTED} = 1;
3020: return $self->BEGIN_MAP();
3021: }
3022:
3023: # Here's the guts of the iterator.
3024:
3025: # Find the next resource, if any.
3026: my $found = 0;
3027: my $i = $self->{MAX_DEPTH};
3028: my $newDepth;
3029: my $here;
3030: while ( $i >= 0 && !$found ) {
1.107 bowersj2 3031: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3032: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 3033: $found = 1;
3034: $newDepth = $i;
3035: }
3036: $i--;
3037: }
3038:
3039: # If we still didn't find anything, we're done.
3040: if ( !$found ) {
3041: # We need to get back down to the correct branch depth
3042: if ( $self->{CURRENT_DEPTH} > 0 ) {
3043: $self->{CURRENT_DEPTH}--;
3044: return END_BRANCH();
3045: } else {
1.222 bowersj2 3046: $self->{FINISHED} = 1;
1.98 bowersj2 3047: return END_MAP();
3048: }
3049: }
3050:
1.104 bowersj2 3051: # If this is not a resource, it must be an END_BRANCH marker we want
3052: # to return directly.
1.107 bowersj2 3053: if (!ref($here)) { # **8**
1.104 bowersj2 3054: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3055: $self->{CURRENT_DEPTH}--;
3056: return $here;
3057: }
3058: }
3059:
3060: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3061: $self->{HERE} = $here;
3062:
1.98 bowersj2 3063: # Get to the right level
3064: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3065: push @{$self->{STACK}->[$newDepth]}, $here;
3066: $self->{CURRENT_DEPTH}--;
3067: return END_BRANCH();
3068: }
3069: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3070: push @{$self->{STACK}->[$newDepth]}, $here;
3071: $self->{CURRENT_DEPTH}++;
3072: return BEGIN_BRANCH();
3073: }
3074:
3075: # If we made it here, we have the next resource, and we're at the
3076: # right branch level. So let's examine the resource for where
3077: # we can get to from here.
3078:
3079: # So we need to look at all the resources we can get to from here,
3080: # categorize them if we haven't seen them, remember if we have a new
3081: my $nextUnfiltered = $here->getNext();
1.104 bowersj2 3082: my $maxDepthAdded = -1;
3083:
1.98 bowersj2 3084: for (@$nextUnfiltered) {
3085: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 3086: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3087: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 3088: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 3089: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 3090: }
3091: }
1.104 bowersj2 3092:
3093: # Is this the end of a branch? If so, all of the resources examined above
3094: # led to lower levels then the one we are currently at, so we push a END_BRANCH
3095: # marker onto the stack so we don't forget.
3096: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3097: # BC branch and gets to C, it will see F as the only next resource, but it's
3098: # one level lower. Thus, this is the end of the branch, since there are no
3099: # more resources added to this level or above.
1.111 bowersj2 3100: # We don't do this if the examined resource is the finish resource,
3101: # because the condition given above is true, but the "END_MAP" will
3102: # take care of things and we should already be at depth 0.
1.104 bowersj2 3103: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3104: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3105: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3106: }
3107:
1.98 bowersj2 3108: # That ends the main iterator logic. Now, do we want to recurse
3109: # down this map (if this resource is a map)?
1.256 albertel 3110: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3111: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3112: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3113: my $firstResource = $self->{HERE}->map_start();
3114: my $finishResource = $self->{HERE}->map_finish();
3115:
3116: $self->{RECURSIVE_ITERATOR} =
3117: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3118: $finishResource, $self->{FILTER},
1.314 albertel 3119: $self->{ALREADY_SEEN},
3120: $self->{CONDITION},
3121: $self->{FORCE_TOP});
1.98 bowersj2 3122: }
3123:
1.116 bowersj2 3124: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3125: # Should you ever find you need it, make sure to add an option to the code
3126: # that you can use; other things depend on this behavior.
1.138 bowersj2 3127: my $browsePriv = $self->{HERE}->browsePriv();
3128: if (!$self->{HERE}->src() ||
3129: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3130: return $self->next($closeAllPages);
1.116 bowersj2 3131: }
3132:
1.98 bowersj2 3133: return $self->{HERE};
3134:
3135: }
3136:
3137: =pod
3138:
1.174 albertel 3139: The other method available on the iterator is B<getStack>, which
3140: returns an array populated with the current 'stack' of maps, as
3141: references to the resource objects. Example: This is useful when
3142: making the navigation map, as we need to check whether we are under a
3143: page map to see if we need to link directly to the resource, or to the
3144: page. The first elements in the array will correspond to the top of
3145: the stack (most inclusive map).
1.98 bowersj2 3146:
3147: =cut
3148:
3149: sub getStack {
3150: my $self=shift;
3151:
3152: my @stack;
3153:
3154: $self->populateStack(\@stack);
3155:
3156: return \@stack;
3157: }
3158:
3159: # Private method: Calls the iterators recursively to populate the stack.
3160: sub populateStack {
3161: my $self=shift;
3162: my $stack = shift;
3163:
3164: push @$stack, $self->{HERE} if ($self->{HERE});
3165:
3166: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3167: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3168: }
1.94 bowersj2 3169: }
3170:
3171: 1;
3172:
3173: package Apache::lonnavmaps::DFSiterator;
1.300 albertel 3174: use WeakRef;
1.320 albertel 3175: use Apache::lonnet;
3176:
1.100 bowersj2 3177: # Not documented in the perldoc: This is a simple iterator that just walks
3178: # through the nav map and presents the resources in a depth-first search
3179: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3180: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3181: # useful for pre-processing of some kind, and is in fact used by the main
3182: # iterator that way, but that's about it.
3183: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3184: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3185: # use might be found for it. - Jeremy
1.94 bowersj2 3186:
1.117 bowersj2 3187: # Unlike the main iterator, this DOES return all resources, even blank ones.
3188: # The main iterator needs them to correctly preprocess the map.
3189:
1.94 bowersj2 3190: sub BEGIN_MAP { return 1; } # begining of a new map
3191: sub END_MAP { return 2; } # end of the map
3192: sub FORWARD { return 1; } # go forward
3193: sub BACKWARD { return 2; }
3194:
1.100 bowersj2 3195: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3196: # filter hash ref (or undef), already seen hash or undef, condition
3197: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3198: sub new {
3199: # magic invocation to create a class instance
3200: my $proto = shift;
3201: my $class = ref($proto) || $proto;
3202: my $self = {};
3203:
1.300 albertel 3204: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3205: return undef unless ($self->{NAV_MAP});
3206:
3207: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3208: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3209:
3210: # If the given resources are just the ID of the resource, get the
3211: # objects
3212: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3213: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3214: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3215: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3216:
3217: $self->{FILTER} = shift;
3218:
3219: # A hash, used as a set, of resource already seen
3220: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3221: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3222: $self->{CONDITION} = shift;
1.89 bowersj2 3223: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3224:
1.100 bowersj2 3225: # Flag: Have we started yet?
1.51 bowersj2 3226: $self->{STARTED} = 0;
3227:
3228: # Should we continue calling the recursive iterator, if any?
3229: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3230: # The recursive iterator, if any
3231: $self->{RECURSIVE_ITERATOR} = undef;
3232: # Are we recursing on a map, or a branch?
3233: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3234: # And the count of how deep it is, so that this iterator can keep track of
3235: # when to pick back up again.
3236: $self->{RECURSIVE_DEPTH} = 0;
3237:
3238: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3239: $self->{STACK} = [];
1.51 bowersj2 3240:
3241: # Start with the first resource
1.89 bowersj2 3242: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3243: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3244: } else {
1.100 bowersj2 3245: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3246: }
1.51 bowersj2 3247:
3248: bless($self);
3249: return $self;
3250: }
3251:
3252: sub next {
3253: my $self = shift;
3254:
3255: # Are we using a recursive iterator? If so, pull from that and
3256: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3257: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3258: # grab the next from the recursive iterator
3259: my $next = $self->{RECURSIVE_ITERATOR}->next();
3260:
3261: # is it a begin or end map? Update depth if so
3262: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3263: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3264:
3265: # Are we back at depth 0? If so, stop recursing.
3266: if ($self->{RECURSIVE_DEPTH} == 0) {
3267: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3268: }
3269:
3270: return $next;
3271: }
3272:
3273: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3274: # END_MAP, which will end the iterator.
3275: if (scalar(@{$self->{STACK}}) == 0) {
3276: return $self->END_MAP();
1.51 bowersj2 3277: }
3278:
3279: # Have we not yet begun? If not, return BEGIN_MAP and
3280: # remember that we've started.
3281: if ( !$self->{STARTED} ) {
3282: $self->{STARTED} = 1;
3283: return $self->BEGIN_MAP;
3284: }
3285:
3286: # Get the next resource in the branch
1.100 bowersj2 3287: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3288:
1.100 bowersj2 3289: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3290: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3291:
3292: # Get the next possible resources
1.90 bowersj2 3293: my $nextUnfiltered;
1.89 bowersj2 3294: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3295: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3296: } else {
1.90 bowersj2 3297: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3298: }
1.51 bowersj2 3299: my $next = [];
3300:
3301: # filter the next possibilities to remove things we've
1.100 bowersj2 3302: # already seen.
1.51 bowersj2 3303: foreach (@$nextUnfiltered) {
1.52 bowersj2 3304: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
3305: push @$next, $_;
3306: }
1.51 bowersj2 3307: }
3308:
3309: while (@$next) {
1.100 bowersj2 3310: # copy the next possibilities over to the stack
3311: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3312: }
3313:
3314: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3315: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3316: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3317: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3318: my $firstResource = $self->{HERE}->map_start();
3319: my $finishResource = $self->{HERE}->map_finish();
3320:
3321: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3322: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3323: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3324: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3325: }
3326:
3327: return $self->{HERE};
1.190 bowersj2 3328: }
3329:
3330: # Identical to the full iterator methods of the same name. Hate to copy/paste
3331: # but I also hate to "inherit" either iterator from the other.
3332:
3333: sub getStack {
3334: my $self=shift;
3335:
3336: my @stack;
3337:
3338: $self->populateStack(\@stack);
3339:
3340: return \@stack;
3341: }
3342:
3343: # Private method: Calls the iterators recursively to populate the stack.
3344: sub populateStack {
3345: my $self=shift;
3346: my $stack = shift;
3347:
3348: push @$stack, $self->{HERE} if ($self->{HERE});
3349:
3350: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3351: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3352: }
1.51 bowersj2 3353: }
3354:
1.1 www 3355: 1;
1.2 www 3356:
1.51 bowersj2 3357: package Apache::lonnavmaps::resource;
1.300 albertel 3358: use WeakRef;
1.51 bowersj2 3359: use Apache::lonnet;
3360:
3361: =pod
3362:
1.217 bowersj2 3363: =head1 Object: resource
1.51 bowersj2 3364:
1.217 bowersj2 3365: X<resource, navmap object>
1.174 albertel 3366: A resource object encapsulates a resource in a resource map, allowing
3367: easy manipulation of the resource, querying the properties of the
3368: resource (including user properties), and represents a reference that
3369: can be used as the canonical representation of the resource by
3370: lonnavmap clients like renderers.
3371:
3372: A resource only makes sense in the context of a navmap, as some of the
3373: data is stored in the navmap object.
3374:
3375: You will probably never need to instantiate this object directly. Use
3376: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3377: starting resource.
1.51 bowersj2 3378:
1.188 bowersj2 3379: Resource objects respect the parameter_hiddenparts, which suppresses
3380: various parts according to the wishes of the map author. As of this
3381: writing, there is no way to override this parameter, and suppressed
3382: parts will never be returned, nor will their response types or ids be
3383: stored.
3384:
1.217 bowersj2 3385: =head2 Overview
1.51 bowersj2 3386:
1.217 bowersj2 3387: A B<Resource> is the most granular type of object in LON-CAPA that can
3388: be included in a course. It can either be a particular resource, like
3389: an HTML page, external resource, problem, etc., or it can be a
3390: container sequence, such as a "page" or a "map".
3391:
3392: To see a sequence from the user's point of view, please see the
3393: B<Creating a Course: Maps and Sequences> chapter of the Author's
3394: Manual.
3395:
3396: A Resource Object, once obtained from a navmap object via a B<getBy*>
3397: method of the navmap, or from an iterator, allows you to query
3398: information about that resource.
3399:
3400: Generally, you do not ever want to create a resource object yourself,
3401: so creation has been left undocumented. Always retrieve resources
3402: from navmap objects.
3403:
3404: =head3 Identifying Resources
3405:
3406: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3407: unique to that resource for a given course. X<resource ID, in big hash>
3408: The Resource ID has the form #.#, where the first number is the same
3409: for every resource in a map, and the second is unique. For instance,
3410: for a course laid out like this:
3411:
3412: * Problem 1
3413: * Map
3414: * Resource 2
3415: * Resource 3
3416:
3417: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3418: C<Resource 3> will share a first number. The second number may end up
3419: re-used between the two groups.
3420:
3421: The resource ID is only used in the big hash, but can be used in the
3422: context of a course to identify a resource easily. (For instance, the
3423: printing system uses it to record which resources from a sequence you
3424: wish to print.)
3425:
3426: X<symb> X<resource, symb>
3427: All resources also have B<symb>s, which uniquely identify a resource
3428: in a course. Many internal LON-CAPA functions expect a symb. A symb
3429: carries along with it the URL of the resource, and the map it appears
3430: in. Symbs are much larger then resource IDs.
1.51 bowersj2 3431:
3432: =cut
3433:
3434: sub new {
3435: # magic invocation to create a class instance
3436: my $proto = shift;
3437: my $class = ref($proto) || $proto;
3438: my $self = {};
3439:
1.300 albertel 3440: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3441: $self->{ID} = shift;
3442:
3443: # Store this new resource in the parent nav map's cache.
3444: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 3445: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 3446:
3447: # A hash that can be used by two-pass algorithms to store data
3448: # about this resource in. Not used by the resource object
3449: # directly.
3450: $self->{DATA} = {};
3451:
3452: bless($self);
3453:
3454: return $self;
3455: }
3456:
1.70 bowersj2 3457: # private function: simplify the NAV_HASH lookups we keep doing
3458: # pass the name, and to automatically append my ID, pass a true val on the
3459: # second param
3460: sub navHash {
3461: my $self = shift;
3462: my $param = shift;
3463: my $id = shift;
1.115 bowersj2 3464: return $self->{NAV_MAP}->navhash($param . ($id?$self->{ID}:""));
1.70 bowersj2 3465: }
3466:
1.51 bowersj2 3467: =pod
3468:
1.217 bowersj2 3469: =head2 Methods
1.70 bowersj2 3470:
1.217 bowersj2 3471: Once you have a resource object, here's what you can do with it:
3472:
3473: =head3 Attribute Retrieval
3474:
3475: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 3476:
3477: =over 4
3478:
1.217 bowersj2 3479: =item * B<ID>: Every resource has an ID that is unique for that
3480: resource in the course it is in. The ID is actually in the hash
3481: representing the resource, so for a resource object $res, obtain
3482: it via C<$res->{ID}).
3483:
1.174 albertel 3484: =item * B<compTitle>:
3485:
3486: Returns a "composite title", that is equal to $res->title() if the
3487: resource has a title, and is otherwise the last part of the URL (e.g.,
3488: "problem.problem").
3489:
3490: =item * B<ext>:
3491:
3492: Returns true if the resource is external.
3493:
3494: =item * B<kind>:
3495:
3496: Returns the kind of the resource from the compiled nav map.
3497:
3498: =item * B<randomout>:
1.106 bowersj2 3499:
1.174 albertel 3500: Returns true if this resource was chosen to NOT be shown to the user
3501: by the random map selection feature. In other words, this is usually
3502: false.
1.70 bowersj2 3503:
1.174 albertel 3504: =item * B<randompick>:
1.70 bowersj2 3505:
1.174 albertel 3506: Returns true for a map if the randompick feature is being used on the
3507: map. (?)
1.70 bowersj2 3508:
1.174 albertel 3509: =item * B<src>:
1.51 bowersj2 3510:
1.174 albertel 3511: Returns the source for the resource.
1.70 bowersj2 3512:
1.174 albertel 3513: =item * B<symb>:
1.70 bowersj2 3514:
1.174 albertel 3515: Returns the symb for the resource.
1.70 bowersj2 3516:
1.174 albertel 3517: =item * B<title>:
1.70 bowersj2 3518:
1.174 albertel 3519: Returns the title of the resource.
3520:
1.51 bowersj2 3521: =back
3522:
3523: =cut
3524:
3525: # These info functions can be used directly, as they don't return
3526: # resource information.
1.85 bowersj2 3527: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.303 albertel 3528: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
1.70 bowersj2 3529: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 3530: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 3531: # considered private and undocumented
1.51 bowersj2 3532: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
3533: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 3534: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
3535: sub randompick {
3536: my $self = shift;
3537: return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .
3538: '.0.parameter_randompick'};
3539: }
1.303 albertel 3540: sub link {
3541: my $self=shift;
3542: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
3543: return $self->src;
3544: }
1.51 bowersj2 3545: sub src {
3546: my $self=shift;
3547: return $self->navHash("src_", 1);
3548: }
1.303 albertel 3549: sub shown_symb {
3550: my $self=shift;
3551: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->symb());}
3552: return $self->symb();
3553: }
1.328 www 3554: sub id {
3555: my $self=shift;
3556: return $self->{ID};
3557: }
3558: sub enclosing_map_src {
3559: my $self=shift;
3560: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3561: return $self->navHash('map_id_'.$first);
3562: }
1.51 bowersj2 3563: sub symb {
3564: my $self=shift;
3565: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3566: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 3567: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 3568: . '___' . $second . '___' . $symbSrc;
1.223 albertel 3569: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 3570: }
1.321 raeburn 3571: sub wrap_symb {
3572: my $self = shift;
3573: return $self->{NAV_MAP}->wrap_symb($self->symb());
3574: }
1.213 bowersj2 3575: sub title {
3576: my $self=shift;
3577: if ($self->{ID} eq '0.0') {
3578: # If this is the top-level map, return the title of the course
3579: # since this map can not be titled otherwise.
1.320 albertel 3580: return $env{'course.'.$env{'request.course.id'}.'.description'};
1.213 bowersj2 3581: }
3582: return $self->navHash("title_", 1); }
1.217 bowersj2 3583: # considered private and undocumented
1.70 bowersj2 3584: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.301 albertel 3585: sub condition {
3586: my $self=shift;
3587: my $undercond=$self->navHash("undercond_", 1);
3588: if (!defined($undercond)) { return 1; };
3589: my $condid=$self->navHash("condid_$undercond");
3590: if (!defined($condid)) { return 1; };
3591: my $condition=&Apache::lonnet::directcondval($condid);
3592: return $condition;
3593: }
1.342 albertel 3594: sub condval {
3595: my $self=shift;
3596: my $uri=&Apache::lonnet::deversion(&Apache::lonnet::declutter($self->src()));
3597: my ($pathname,$filename)=($uri=~m|(.*)/([^/]*)|);
3598: $pathname=~s/^adm\/wrapper\///;
3599:
3600: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3601: /\&\Q$filename\E\:([\d\|]+)\&/);
3602: if ($match) {
3603: return &Apache::lonnet::condval($1);
3604: }
3605: return 0;
3606: }
1.106 bowersj2 3607: sub compTitle {
3608: my $self = shift;
3609: my $title = $self->title();
1.176 www 3610: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 3611: if (!$title) {
3612: $title = $self->src();
3613: $title = substr($title, rindex($title, '/') + 1);
3614: }
3615: return $title;
3616: }
1.70 bowersj2 3617: =pod
3618:
3619: B<Predicate Testing the Resource>
3620:
3621: These methods are shortcuts to deciding if a given resource has a given property.
3622:
3623: =over 4
3624:
1.174 albertel 3625: =item * B<is_map>:
3626:
3627: Returns true if the resource is a map type.
3628:
3629: =item * B<is_problem>:
1.70 bowersj2 3630:
1.174 albertel 3631: Returns true if the resource is a problem type, false
3632: otherwise. (Looks at the extension on the src field; might need more
3633: to work correctly.)
1.70 bowersj2 3634:
1.174 albertel 3635: =item * B<is_page>:
1.70 bowersj2 3636:
1.174 albertel 3637: Returns true if the resource is a page.
3638:
3639: =item * B<is_sequence>:
3640:
3641: Returns true if the resource is a sequence.
1.70 bowersj2 3642:
3643: =back
3644:
3645: =cut
3646:
1.256 albertel 3647: sub hasResource {
3648: my $self = shift;
3649: return $self->{NAV_MAP}->hasResource(@_);
3650: }
3651:
3652: sub retrieveResources {
3653: my $self = shift;
3654: return $self->{NAV_MAP}->retrieveResources(@_);
3655: }
1.70 bowersj2 3656:
3657: sub is_html {
1.51 bowersj2 3658: my $self=shift;
3659: my $src = $self->src();
1.70 bowersj2 3660: return ($src =~ /html$/);
1.51 bowersj2 3661: }
1.70 bowersj2 3662: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
3663: sub is_page {
1.51 bowersj2 3664: my $self=shift;
3665: my $src = $self->src();
1.205 bowersj2 3666: return $self->navHash("is_map_", 1) &&
3667: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 3668: }
1.70 bowersj2 3669: sub is_problem {
1.51 bowersj2 3670: my $self=shift;
3671: my $src = $self->src();
1.337 albertel 3672: return ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/)
1.256 albertel 3673: }
3674: sub contains_problem {
3675: my $self=shift;
3676: if ($self->is_page()) {
3677: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
3678: return $hasProblem;
3679: }
3680: return 0;
1.51 bowersj2 3681: }
1.70 bowersj2 3682: sub is_sequence {
1.51 bowersj2 3683: my $self=shift;
3684: my $src = $self->src();
1.205 bowersj2 3685: return $self->navHash("is_map_", 1) &&
3686: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 3687: }
1.261 matthew 3688: sub is_survey {
3689: my $self = shift();
3690: my $part = shift();
1.263 albertel 3691: if ($self->parmval('type',$part) eq 'survey') {
1.261 matthew 3692: return 1;
3693: }
1.263 albertel 3694: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 3695: return 1;
3696: }
3697: return 0;
3698: }
1.51 bowersj2 3699:
1.266 raeburn 3700: sub is_empty_sequence {
3701: my $self=shift;
3702: my $src = $self->src();
3703: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
3704: }
3705:
1.101 bowersj2 3706: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 3707: sub parmval {
3708: my $self = shift;
3709: my $what = shift;
1.185 bowersj2 3710: my $part = shift;
3711: if (!defined($part)) {
3712: $part = '0';
3713: }
1.51 bowersj2 3714: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
3715: }
3716:
1.70 bowersj2 3717: =pod
3718:
3719: B<Map Methods>
3720:
1.174 albertel 3721: These methods are useful for getting information about the map
3722: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 3723:
3724: =over 4
3725:
1.174 albertel 3726: =item * B<map_finish>:
3727:
3728: Returns a reference to a resource object corresponding to the finish
3729: resource of the map.
1.70 bowersj2 3730:
1.174 albertel 3731: =item * B<map_pc>:
1.70 bowersj2 3732:
1.174 albertel 3733: Returns the pc value of the map, which is the first number that
3734: appears in the resource ID of the resources in the map, and is the
3735: number that appears around the middle of the symbs of the resources in
3736: that map.
1.70 bowersj2 3737:
1.174 albertel 3738: =item * B<map_start>:
3739:
3740: Returns a reference to a resource object corresponding to the start
3741: resource of the map.
3742:
3743: =item * B<map_type>:
3744:
3745: Returns a string with the type of the map in it.
1.70 bowersj2 3746:
3747: =back
1.51 bowersj2 3748:
1.70 bowersj2 3749: =cut
1.51 bowersj2 3750:
3751: sub map_finish {
3752: my $self = shift;
3753: my $src = $self->src();
1.144 bowersj2 3754: $src = Apache::lonnet::clutter($src);
1.51 bowersj2 3755: my $res = $self->navHash("map_finish_$src", 0);
3756: $res = $self->{NAV_MAP}->getById($res);
3757: return $res;
3758: }
1.70 bowersj2 3759: sub map_pc {
3760: my $self = shift;
3761: my $src = $self->src();
3762: return $self->navHash("map_pc_$src", 0);
3763: }
1.51 bowersj2 3764: sub map_start {
3765: my $self = shift;
3766: my $src = $self->src();
1.144 bowersj2 3767: $src = Apache::lonnet::clutter($src);
1.51 bowersj2 3768: my $res = $self->navHash("map_start_$src", 0);
3769: $res = $self->{NAV_MAP}->getById($res);
3770: return $res;
3771: }
3772: sub map_type {
3773: my $self = shift;
3774: my $pc = $self->map_pc();
3775: return $self->navHash("map_type_$pc", 0);
3776: }
3777:
3778: #####
3779: # Property queries
3780: #####
3781:
3782: # These functions will be responsible for returning the CORRECT
3783: # VALUE for the parameter, no matter what. So while they may look
3784: # like direct calls to parmval, they can be more then that.
3785: # So, for instance, the duedate function should use the "duedatetype"
3786: # information, rather then the resource object user.
3787:
3788: =pod
3789:
3790: =head2 Resource Parameters
3791:
1.174 albertel 3792: In order to use the resource parameters correctly, the nav map must
3793: have been instantiated with genCourseAndUserOptions set to true, so
3794: the courseopt and useropt is read correctly. Then, you can call these
3795: functions to get the relevant parameters for the resource. Each
3796: function defaults to part "0", but can be directed to another part by
3797: passing the part as the parameter.
3798:
3799: These methods are responsible for getting the parameter correct, not
3800: merely reflecting the contents of the GDBM hashes. As we move towards
3801: dates relative to other dates, these methods should be updated to
3802: reflect that. (Then, anybody using these methods will not have to update
3803: their code.)
3804:
3805: =over 4
3806:
3807: =item * B<acc>:
3808:
3809: Get the Client IP/Name Access Control information.
1.51 bowersj2 3810:
1.174 albertel 3811: =item * B<answerdate>:
1.51 bowersj2 3812:
1.174 albertel 3813: Get the answer-reveal date for the problem.
3814:
1.211 bowersj2 3815: =item * B<awarded>:
3816:
3817: Gets the awarded value for the problem part. Requires genUserData set to
3818: true when the navmap object was created.
3819:
1.174 albertel 3820: =item * B<duedate>:
3821:
3822: Get the due date for the problem.
3823:
3824: =item * B<tries>:
3825:
3826: Get the number of tries the student has used on the problem.
3827:
3828: =item * B<maxtries>:
3829:
3830: Get the number of max tries allowed.
3831:
3832: =item * B<opendate>:
1.51 bowersj2 3833:
1.174 albertel 3834: Get the open date for the problem.
1.51 bowersj2 3835:
1.174 albertel 3836: =item * B<sig>:
1.51 bowersj2 3837:
1.174 albertel 3838: Get the significant figures setting.
1.51 bowersj2 3839:
1.174 albertel 3840: =item * B<tol>:
1.51 bowersj2 3841:
1.174 albertel 3842: Get the tolerance for the problem.
1.51 bowersj2 3843:
1.174 albertel 3844: =item * B<tries>:
1.51 bowersj2 3845:
1.174 albertel 3846: Get the number of tries the user has already used on the problem.
1.51 bowersj2 3847:
1.174 albertel 3848: =item * B<type>:
1.51 bowersj2 3849:
1.174 albertel 3850: Get the question type for the problem.
1.70 bowersj2 3851:
1.174 albertel 3852: =item * B<weight>:
1.51 bowersj2 3853:
1.174 albertel 3854: Get the weight for the problem.
1.51 bowersj2 3855:
3856: =back
3857:
3858: =cut
3859:
3860: sub acc {
3861: (my $self, my $part) = @_;
3862: return $self->parmval("acc", $part);
3863: }
3864: sub answerdate {
3865: (my $self, my $part) = @_;
3866: # Handle intervals
3867: if ($self->parmval("answerdate.type", $part) eq 'date_interval') {
3868: return $self->duedate($part) +
3869: $self->parmval("answerdate", $part);
3870: }
3871: return $self->parmval("answerdate", $part);
1.106 bowersj2 3872: }
1.211 bowersj2 3873: sub awarded {
3874: my $self = shift; my $part = shift;
1.221 bowersj2 3875: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 3876: if (!defined($part)) { $part = '0'; }
3877: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
3878: }
1.51 bowersj2 3879: sub duedate {
3880: (my $self, my $part) = @_;
1.260 albertel 3881: my $interval=$self->parmval("interval", $part);
3882: if ($interval) {
3883: my $first_access=&Apache::lonnet::get_first_access('map',$self->symb);
3884: if ($first_access) { return ($first_access+$interval); }
3885: }
1.51 bowersj2 3886: return $self->parmval("duedate", $part);
3887: }
1.334 albertel 3888: sub handgrade {
3889: (my $self, my $part) = @_;
3890: return $self->parmval("handgrade", $part);
3891: }
1.51 bowersj2 3892: sub maxtries {
3893: (my $self, my $part) = @_;
3894: return $self->parmval("maxtries", $part);
3895: }
3896: sub opendate {
3897: (my $self, my $part) = @_;
3898: if ($self->parmval("opendate.type", $part) eq 'date_interval') {
3899: return $self->duedate($part) -
3900: $self->parmval("opendate", $part);
3901: }
3902: return $self->parmval("opendate");
3903: }
1.185 bowersj2 3904: sub problemstatus {
3905: (my $self, my $part) = @_;
1.236 bowersj2 3906: return lc $self->parmval("problemstatus", $part);
1.185 bowersj2 3907: }
1.51 bowersj2 3908: sub sig {
3909: (my $self, my $part) = @_;
3910: return $self->parmval("sig", $part);
3911: }
3912: sub tol {
3913: (my $self, my $part) = @_;
3914: return $self->parmval("tol", $part);
3915: }
1.108 bowersj2 3916: sub tries {
3917: my $self = shift;
3918: my $tries = $self->queryRestoreHash('tries', shift);
3919: if (!defined($tries)) { return '0';}
1.51 bowersj2 3920: return $tries;
3921: }
1.70 bowersj2 3922: sub type {
3923: (my $self, my $part) = @_;
3924: return $self->parmval("type", $part);
3925: }
1.109 bowersj2 3926: sub weight {
3927: my $self = shift; my $part = shift;
1.211 bowersj2 3928: if (!defined($part)) { $part = '0'; }
3929: return &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.320 albertel 3930: $self->symb(), $env{'user.domain'},
3931: $env{'user.name'},
3932: $env{'request.course.sec'});
1.274 matthew 3933: }
3934: sub part_display {
3935: my $self= shift(); my $partID = shift();
3936: if (! defined($partID)) { $partID = '0'; }
3937: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
3938: $self->symb);
3939: if (! defined($display) || $display eq '') {
3940: $display = $partID;
3941: }
3942: return $display;
1.70 bowersj2 3943: }
1.51 bowersj2 3944:
3945: # Multiple things need this
3946: sub getReturnHash {
3947: my $self = shift;
3948:
3949: if (!defined($self->{RETURN_HASH})) {
1.84 bowersj2 3950: my %tmpHash = &Apache::lonnet::restore($self->symb());
1.51 bowersj2 3951: $self->{RETURN_HASH} = \%tmpHash;
3952: }
3953: }
3954:
3955: ######
3956: # Status queries
3957: ######
3958:
3959: # These methods query the status of problems.
3960:
3961: # If we need to count parts, this function determines the number of
3962: # parts from the metadata. When called, it returns a reference to a list
3963: # of strings corresponding to the parts. (Thus, using it in a scalar context
3964: # tells you how many parts you have in the problem:
3965: # $partcount = scalar($resource->countParts());
3966: # Don't use $self->{PARTS} directly because you don't know if it's been
3967: # computed yet.
3968:
3969: =pod
3970:
3971: =head2 Resource misc
3972:
3973: Misc. functions for the resource.
3974:
3975: =over 4
3976:
1.174 albertel 3977: =item * B<hasDiscussion>:
1.59 bowersj2 3978:
1.174 albertel 3979: Returns a false value if there has been discussion since the user last
3980: logged in, true if there has. Always returns false if the discussion
3981: data was not extracted when the nav map was constructed.
3982:
3983: =item * B<getFeedback>:
3984:
3985: Gets the feedback for the resource and returns the raw feedback string
3986: for the resource, or the null string if there is no feedback or the
3987: email data was not extracted when the nav map was constructed. Usually
3988: used like this:
1.59 bowersj2 3989:
3990: for (split(/\,/, $res->getFeedback())) {
3991: my $link = &Apache::lonnet::escape($_);
3992: ...
3993:
3994: and use the link as appropriate.
3995:
3996: =cut
3997:
3998: sub hasDiscussion {
3999: my $self = shift;
4000: return $self->{NAV_MAP}->hasDiscussion($self->symb());
4001: }
4002:
4003: sub getFeedback {
4004: my $self = shift;
1.124 bowersj2 4005: my $source = $self->src();
1.125 bowersj2 4006: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.124 bowersj2 4007: return $self->{NAV_MAP}->getFeedback($source);
4008: }
4009:
4010: sub getErrors {
4011: my $self = shift;
4012: my $source = $self->src();
4013: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
4014: return $self->{NAV_MAP}->getErrors($source);
1.59 bowersj2 4015: }
4016:
4017: =pod
4018:
1.174 albertel 4019: =item * B<parts>():
1.51 bowersj2 4020:
1.174 albertel 4021: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 4022: each part of the problem. Single part problems have only a part '0'.
4023: Multipart problems do not return their part '0', since they typically
4024: do not really matter.
1.174 albertel 4025:
4026: =item * B<countParts>():
4027:
4028: Returns the number of parts of the problem a student can answer. Thus,
4029: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 4030: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 4031:
1.290 matthew 4032: =item * B<countResponses>():
4033:
4034: Returns the total number of responses in the problem a student can answer.
4035:
4036: =item * B<responseTypes>():
4037:
4038: Returns a hash whose keys are the response types. The values are the number
4039: of times each response type is used. This is for the I<entire> problem, not
4040: just a single part.
4041:
1.192 bowersj2 4042: =item * B<multipart>():
4043:
1.193 bowersj2 4044: Returns true if the problem is multipart, false otherwise. Use this instead
4045: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 4046:
1.187 bowersj2 4047: =item * B<responseType>($part):
4048:
4049: Returns the response type of the part, without the word "response" on the
4050: end. Example return values: 'string', 'essay', 'numeric', etc.
4051:
1.193 bowersj2 4052: =item * B<responseIds>($part):
1.187 bowersj2 4053:
1.193 bowersj2 4054: Retreives the response IDs for the given part as an array reference containing
4055: strings naming the response IDs. This may be empty.
1.187 bowersj2 4056:
1.51 bowersj2 4057: =back
4058:
4059: =cut
4060:
4061: sub parts {
4062: my $self = shift;
4063:
1.192 bowersj2 4064: if ($self->ext) { return []; }
1.67 bowersj2 4065:
1.51 bowersj2 4066: $self->extractParts();
4067: return $self->{PARTS};
4068: }
4069:
4070: sub countParts {
4071: my $self = shift;
4072:
4073: my $parts = $self->parts();
1.191 bowersj2 4074:
4075: # If I left this here, then it's not necessary.
4076: #my $delta = 0;
4077: #for my $part (@$parts) {
4078: # if ($part eq '0') { $delta--; }
4079: #}
1.66 bowersj2 4080:
4081: if ($self->{RESOURCE_ERROR}) {
4082: return 0;
4083: }
4084:
1.191 bowersj2 4085: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 4086: }
4087:
1.290 matthew 4088: sub countResponses {
4089: my $self = shift;
4090: my $count;
1.293 matthew 4091: foreach my $part (@{$self->parts()}) {
4092: $count+= scalar($self->responseIds($part));
1.290 matthew 4093: }
4094: return $count;
4095: }
4096:
4097: sub responseTypes {
4098: my $self = shift;
1.291 albertel 4099: my %responses;
1.290 matthew 4100: foreach my $part ($self->parts()) {
4101: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 4102: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 4103: }
4104: }
1.291 albertel 4105: return %responses;
1.290 matthew 4106: }
4107:
1.192 bowersj2 4108: sub multipart {
4109: my $self = shift;
4110: return $self->countParts() > 1;
1.51 bowersj2 4111: }
4112:
1.225 bowersj2 4113: sub singlepart {
4114: my $self = shift;
4115: return $self->countParts() == 1;
4116: }
4117:
1.187 bowersj2 4118: sub responseType {
1.184 bowersj2 4119: my $self = shift;
4120: my $part = shift;
4121:
4122: $self->extractParts();
1.235 albertel 4123: if (defined($self->{RESPONSE_TYPES}->{$part})) {
4124: return @{$self->{RESPONSE_TYPES}->{$part}};
4125: } else {
4126: return undef;
4127: }
1.187 bowersj2 4128: }
4129:
1.193 bowersj2 4130: sub responseIds {
1.187 bowersj2 4131: my $self = shift;
4132: my $part = shift;
4133:
4134: $self->extractParts();
1.235 albertel 4135: if (defined($self->{RESPONSE_IDS}->{$part})) {
4136: return @{$self->{RESPONSE_IDS}->{$part}};
4137: } else {
4138: return undef;
4139: }
1.184 bowersj2 4140: }
4141:
4142: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 4143: # part types, and saves it.
1.51 bowersj2 4144: sub extractParts {
4145: my $self = shift;
4146:
1.153 bowersj2 4147: return if (defined($self->{PARTS}));
1.67 bowersj2 4148: return if ($self->ext);
1.51 bowersj2 4149:
4150: $self->{PARTS} = [];
4151:
1.181 bowersj2 4152: my %parts;
4153:
1.82 bowersj2 4154: # Retrieve part count, if this is a problem
4155: if ($self->is_problem()) {
1.240 albertel 4156: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 4157: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 4158:
1.239 bowersj2 4159: if ($partorder) {
4160: my @parts;
4161: for my $part (split (/,/,$partorder)) {
4162: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4163: push @parts, $part;
1.241 albertel 4164: $parts{$part} = 1;
1.239 bowersj2 4165: }
4166: }
4167: $self->{PARTS} = \@parts;
4168: } else {
4169: if (!$metadata) {
4170: $self->{RESOURCE_ERROR} = 1;
4171: $self->{PARTS} = [];
4172: $self->{PART_TYPE} = {};
4173: return;
4174: }
4175: foreach (split(/\,/,$metadata)) {
1.337 albertel 4176: if ($_ =~ /^(?:part|Task)_(.*)$/) {
1.239 bowersj2 4177: my $part = $1;
4178: # This floods the logs if it blows up
4179: if (defined($parts{$part})) {
1.241 albertel 4180: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
4181: }
1.239 bowersj2 4182:
4183: # check to see if part is turned off.
4184:
4185: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4186: $parts{$part} = 1;
4187: }
4188: }
4189: }
4190: my @sortedParts = sort keys %parts;
4191: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 4192: }
1.82 bowersj2 4193:
1.187 bowersj2 4194:
1.284 matthew 4195: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 4196: my %responseIdHash;
4197: my %responseTypeHash;
4198:
1.189 bowersj2 4199:
4200: # Init the responseIdHash
4201: foreach (@{$self->{PARTS}}) {
4202: $responseIdHash{$_} = [];
4203: }
4204:
1.187 bowersj2 4205: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 4206: # response id are delimited by underscores, but both the part
1.187 bowersj2 4207: # name and response id can themselves have underscores in them.
4208: # So we have to use our knowlege of part names to figure out
4209: # where the part names begin and end, and even then, it is possible
4210: # to construct ambiguous situations.
4211: foreach (split /,/, $metadata) {
4212: if ($_ =~ /^([a-zA-Z]+)response_(.*)/) {
4213: my $responseType = $1;
4214: my $partStuff = $2;
4215: my $partIdSoFar = '';
4216: my @partChunks = split /_/, $partStuff;
4217: my $i = 0;
4218: for ($i = 0; $i < scalar(@partChunks); $i++) {
4219: if ($partIdSoFar) { $partIdSoFar .= '_'; }
4220: $partIdSoFar .= $partChunks[$i];
4221: if ($parts{$partIdSoFar}) {
4222: my @otherChunks = @partChunks[$i+1..$#partChunks];
4223: my $responseId = join('_', @otherChunks);
1.188 bowersj2 4224: push @{$responseIdHash{$partIdSoFar}}, $responseId;
1.233 matthew 4225: push @{$responseTypeHash{$partIdSoFar}}, $responseType;
1.187 bowersj2 4226: }
4227: }
4228: }
4229: }
1.264 albertel 4230: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 4231: #
4232: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 4233: if ($resorder) {
4234: my @resorder=split(/,/,$resorder);
4235: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 4236: my $i=0;
4237: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 4238: my @neworder;
4239: foreach my $possibleid (@resorder) {
4240: if (exists($resids{$possibleid})) {
1.286 albertel 4241: push(@neworder,$resids{$possibleid});
1.264 albertel 4242: }
4243: }
1.286 albertel 4244: my @ids;
4245: my @type;
4246: foreach my $element (@neworder) {
4247: push (@ids,$responseIdHash{$part}->[$element]);
4248: push (@type,$responseTypeHash{$part}->[$element]);
4249: }
4250: $responseIdHash{$part}=\@ids;
4251: $responseTypeHash{$part}=\@type;
1.264 albertel 4252: }
4253: }
1.187 bowersj2 4254: $self->{RESPONSE_IDS} = \%responseIdHash;
4255: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 4256: }
4257:
1.51 bowersj2 4258: return;
4259: }
4260:
4261: =pod
4262:
4263: =head2 Resource Status
4264:
1.174 albertel 4265: Problem resources have status information, reflecting their various
4266: dates and completion statuses.
1.51 bowersj2 4267:
1.174 albertel 4268: There are two aspects to the status: the date-related information and
4269: the completion information.
1.51 bowersj2 4270:
1.174 albertel 4271: Idiomatic usage of these two methods would probably look something
4272: like
1.51 bowersj2 4273:
4274: foreach ($resource->parts()) {
4275: my $dateStatus = $resource->getDateStatus($_);
4276: my $completionStatus = $resource->getCompletionStatus($_);
4277:
1.70 bowersj2 4278: or
4279:
4280: my $status = $resource->status($_);
4281:
1.51 bowersj2 4282: ... use it here ...
4283: }
4284:
1.174 albertel 4285: Which you use depends on exactly what you are looking for. The
4286: status() function has been optimized for the nav maps display and may
4287: not precisely match what you need elsewhere.
1.101 bowersj2 4288:
1.174 albertel 4289: The symbolic constants shown below can be accessed through the
4290: resource object: C<$res->OPEN>.
1.101 bowersj2 4291:
1.51 bowersj2 4292: =over 4
4293:
1.174 albertel 4294: =item * B<getDateStatus>($part):
4295:
4296: ($part defaults to 0). A convenience function that returns a symbolic
4297: constant telling you about the date status of the part. The possible
4298: return values are:
1.51 bowersj2 4299:
4300: =back
4301:
4302: B<Date Codes>
4303:
4304: =over 4
4305:
1.174 albertel 4306: =item * B<OPEN_LATER>:
4307:
4308: The problem will be opened later.
4309:
4310: =item * B<OPEN>:
4311:
4312: Open and not yet due.
4313:
1.51 bowersj2 4314:
1.174 albertel 4315: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4316:
1.174 albertel 4317: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 4318:
1.174 albertel 4319: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 4320:
1.174 albertel 4321: The due date has passed and there is no answer opening date set.
1.51 bowersj2 4322:
1.174 albertel 4323: =item * B<ANSWER_OPEN>:
1.51 bowersj2 4324:
1.174 albertel 4325: The answer date is here.
4326:
4327: =item * B<NETWORK_FAILURE>:
4328:
4329: The information is unknown due to network failure.
1.51 bowersj2 4330:
4331: =back
4332:
4333: =cut
4334:
4335: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 4336: sub OPEN_LATER { return 0; }
4337: sub OPEN { return 1; }
4338: sub PAST_DUE_NO_ANSWER { return 2; }
4339: sub PAST_DUE_ANSWER_LATER { return 3; }
4340: sub ANSWER_OPEN { return 4; }
4341: sub NOTHING_SET { return 5; }
4342: sub NETWORK_FAILURE { return 100; }
4343:
4344: # getDateStatus gets the date status for a given problem part.
4345: # Because answer date, due date, and open date are fully independent
4346: # (i.e., it is perfectly possible to *only* have an answer date),
4347: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
4348: # (past, future, none given). This function handles this with a decision
4349: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 4350:
4351: sub getDateStatus {
4352: my $self = shift;
4353: my $part = shift;
4354: $part = "0" if (!defined($part));
1.54 bowersj2 4355:
4356: # Always return network failure if there was one.
1.51 bowersj2 4357: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4358:
4359: my $now = time();
4360:
1.53 bowersj2 4361: my $open = $self->opendate($part);
4362: my $due = $self->duedate($part);
4363: my $answer = $self->answerdate($part);
4364:
4365: if (!$open && !$due && !$answer) {
4366: # no data on the problem at all
4367: # should this be the same as "open later"? think multipart.
4368: return $self->NOTHING_SET;
4369: }
1.59 bowersj2 4370: if (!$open || $now < $open) {return $self->OPEN_LATER}
4371: if (!$due || $now < $due) {return $self->OPEN}
4372: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
4373: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 4374: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 4375: }
4376:
4377: =pod
4378:
4379: B<>
4380:
4381: =over 4
4382:
1.174 albertel 4383: =item * B<getCompletionStatus>($part):
1.51 bowersj2 4384:
1.174 albertel 4385: ($part defaults to 0.) A convenience function that returns a symbolic
4386: constant telling you about the completion status of the part, with the
4387: following possible results:
4388:
4389: =back
1.51 bowersj2 4390:
4391: B<Completion Codes>
4392:
4393: =over 4
4394:
1.174 albertel 4395: =item * B<NOT_ATTEMPTED>:
4396:
4397: Has not been attempted at all.
4398:
4399: =item * B<INCORRECT>:
4400:
4401: Attempted, but wrong by student.
1.51 bowersj2 4402:
1.174 albertel 4403: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 4404:
1.174 albertel 4405: Attempted, but wrong by instructor override.
1.51 bowersj2 4406:
1.174 albertel 4407: =item * B<CORRECT>:
1.51 bowersj2 4408:
1.174 albertel 4409: Correct or correct by instructor.
1.51 bowersj2 4410:
1.174 albertel 4411: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 4412:
1.174 albertel 4413: Correct by instructor override.
1.51 bowersj2 4414:
1.174 albertel 4415: =item * B<EXCUSED>:
4416:
4417: Excused. Not yet implemented.
4418:
4419: =item * B<NETWORK_FAILURE>:
4420:
4421: Information not available due to network failure.
4422:
4423: =item * B<ATTEMPTED>:
4424:
4425: Attempted, and not yet graded.
1.69 bowersj2 4426:
1.51 bowersj2 4427: =back
4428:
4429: =cut
4430:
1.53 bowersj2 4431: sub NOT_ATTEMPTED { return 10; }
4432: sub INCORRECT { return 11; }
4433: sub INCORRECT_BY_OVERRIDE { return 12; }
4434: sub CORRECT { return 13; }
4435: sub CORRECT_BY_OVERRIDE { return 14; }
4436: sub EXCUSED { return 15; }
1.69 bowersj2 4437: sub ATTEMPTED { return 16; }
1.51 bowersj2 4438:
4439: sub getCompletionStatus {
4440: my $self = shift;
1.332 albertel 4441: my $part = shift;
1.51 bowersj2 4442: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4443:
1.332 albertel 4444: my $status = $self->queryRestoreHash('solved', $part);
1.51 bowersj2 4445:
1.251 www 4446: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 4447: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 4448: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.332 albertel 4449: if ($status eq 'correct_by_override') {
4450: return $self->CORRECT_BY_OVERRIDE;
4451: }
1.51 bowersj2 4452: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
4453: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
4454: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 4455: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 4456: return $self->NOT_ATTEMPTED;
1.108 bowersj2 4457: }
4458:
4459: sub queryRestoreHash {
4460: my $self = shift;
4461: my $hashentry = shift;
4462: my $part = shift;
1.185 bowersj2 4463: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 4464: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4465:
4466: $self->getReturnHash();
4467:
4468: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 4469: }
4470:
4471: =pod
4472:
4473: B<Composite Status>
4474:
1.174 albertel 4475: Along with directly returning the date or completion status, the
4476: resource object includes a convenience function B<status>() that will
4477: combine the two status tidbits into one composite status that can
1.191 bowersj2 4478: represent the status of the resource as a whole. This method represents
4479: the concept of the thing we want to display to the user on the nav maps
4480: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 4481: documented in the comments of the status method. The following results
4482: may be returned, all available as methods on the resource object
1.185 bowersj2 4483: ($res->NETWORK_FAILURE): In addition to the return values that match
4484: the date or completion status, this function can return "ANSWER_SUBMITTED"
4485: if that problemstatus parameter value is set to No, suppressing the
4486: incorrect/correct feedback.
1.51 bowersj2 4487:
4488: =over 4
4489:
1.174 albertel 4490: =item * B<NETWORK_FAILURE>:
4491:
4492: The network has failed and the information is not available.
1.51 bowersj2 4493:
1.174 albertel 4494: =item * B<NOTHING_SET>:
1.53 bowersj2 4495:
1.174 albertel 4496: No dates have been set for this problem (part) at all. (Because only
4497: certain parts of a multi-part problem may be assigned, this can not be
4498: collapsed into "open later", as we do not know a given part will EVER
4499: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 4500:
1.174 albertel 4501: =item * B<CORRECT>:
1.51 bowersj2 4502:
1.174 albertel 4503: For any reason at all, the part is considered correct.
1.54 bowersj2 4504:
1.174 albertel 4505: =item * B<EXCUSED>:
1.51 bowersj2 4506:
1.174 albertel 4507: For any reason at all, the problem is excused.
1.51 bowersj2 4508:
1.174 albertel 4509: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 4510:
1.174 albertel 4511: The problem is past due, not considered correct, and no answer date is
4512: set.
1.51 bowersj2 4513:
1.174 albertel 4514: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4515:
1.174 albertel 4516: The problem is past due, not considered correct, and an answer date in
4517: the future is set.
1.51 bowersj2 4518:
1.174 albertel 4519: =item * B<ANSWER_OPEN>:
4520:
4521: The problem is past due, not correct, and the answer is now available.
4522:
4523: =item * B<OPEN_LATER>:
4524:
4525: The problem is not yet open.
4526:
4527: =item * B<TRIES_LEFT>:
4528:
4529: The problem is open, has been tried, is not correct, but there are
4530: tries left.
4531:
4532: =item * B<INCORRECT>:
4533:
4534: The problem is open, and all tries have been used without getting the
4535: correct answer.
4536:
4537: =item * B<OPEN>:
4538:
4539: The item is open and not yet tried.
4540:
4541: =item * B<ATTEMPTED>:
4542:
4543: The problem has been attempted.
1.69 bowersj2 4544:
1.185 bowersj2 4545: =item * B<ANSWER_SUBMITTED>:
4546:
4547: An answer has been submitted, but the student should not see it.
4548:
1.51 bowersj2 4549: =back
4550:
4551: =cut
4552:
1.185 bowersj2 4553: sub TRIES_LEFT { return 20; }
4554: sub ANSWER_SUBMITTED { return 21; }
1.332 albertel 4555: sub PARTIALLY_CORRECT{ return 22; }
1.51 bowersj2 4556:
4557: sub status {
4558: my $self = shift;
4559: my $part = shift;
4560: if (!defined($part)) { $part = "0"; }
4561: my $completionStatus = $self->getCompletionStatus($part);
4562: my $dateStatus = $self->getDateStatus($part);
4563:
4564: # What we have is a two-dimensional matrix with 4 entries on one
4565: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 4566: # plus network failure and "no date data at all".
1.51 bowersj2 4567:
1.222 bowersj2 4568: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 4569: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 4570:
1.236 bowersj2 4571: my $suppressFeedback = $self->problemstatus($part) eq 'no';
4572: # If there's an answer date and we're past it, don't
4573: # suppress the feedback; student should know
1.330 albertel 4574: if ($self->duedate($part) && $self->duedate($part) < time() &&
4575: $self->answerdate($part) && $self->answerdate($part) < time()) {
1.236 bowersj2 4576: $suppressFeedback = 0;
4577: }
1.185 bowersj2 4578:
1.51 bowersj2 4579: # There are a few whole rows we can dispose of:
1.53 bowersj2 4580: if ($completionStatus == CORRECT ||
4581: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.332 albertel 4582: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
4583: my $awarded=$self->awarded($part);
4584: if ($awarded < 1 && $awarded > 0) {
4585: return PARTIALLY_CORRECT;
4586: } elsif ($awarded<1) {
4587: return INCORRECT;
4588: }
4589: return CORRECT;
1.69 bowersj2 4590: }
4591:
1.343 albertel 4592: # If it's WRONG... and not open
4593: if ( ($completionStatus == INCORRECT ||
4594: $completionStatus == INCORRECT_BY_OVERRIDE)
4595: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
4596: return INCORRECT;
4597: }
4598:
1.69 bowersj2 4599: if ($completionStatus == ATTEMPTED) {
4600: return ATTEMPTED;
1.53 bowersj2 4601: }
4602:
4603: # If it's EXCUSED, then return that no matter what
4604: if ($completionStatus == EXCUSED) {
4605: return EXCUSED;
1.51 bowersj2 4606: }
4607:
1.53 bowersj2 4608: if ($dateStatus == NOTHING_SET) {
4609: return NOTHING_SET;
1.51 bowersj2 4610: }
4611:
1.69 bowersj2 4612: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
4613: # by 4 matrix (date statuses).
1.51 bowersj2 4614:
1.54 bowersj2 4615: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 4616: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 4617: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 4618: }
4619:
1.53 bowersj2 4620: if ($dateStatus == ANSWER_OPEN) {
4621: return ANSWER_OPEN;
1.51 bowersj2 4622: }
4623:
4624: # Now: (incorrect, incorrect_override, not_attempted) x
4625: # (open_later), (open)
4626:
1.53 bowersj2 4627: if ($dateStatus == OPEN_LATER) {
4628: return OPEN_LATER;
1.51 bowersj2 4629: }
4630:
4631: # If it's WRONG...
1.53 bowersj2 4632: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 4633: # and there are TRIES LEFT:
1.79 bowersj2 4634: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 4635: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 4636: }
1.185 bowersj2 4637: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 4638: }
4639:
4640: # Otherwise, it's untried and open
1.53 bowersj2 4641: return OPEN;
1.224 bowersj2 4642: }
4643:
4644: sub CLOSED { return 23; }
4645: sub ERROR { return 24; }
4646:
4647: =pod
4648:
4649: B<Simple Status>
4650:
4651: Convenience method B<simpleStatus> provides a "simple status" for the resource.
4652: "Simple status" corresponds to "which icon is shown on the
4653: Navmaps". There are six "simple" statuses:
4654:
4655: =over 4
4656:
4657: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
4658:
4659: =item * B<OPEN>: The problem is open and unattempted.
4660:
4661: =item * B<CORRECT>: The problem is correct for any reason.
4662:
4663: =item * B<INCORRECT>: The problem is incorrect and can still be
4664: completed successfully.
4665:
4666: =item * B<ATTEMPTED>: The problem has been attempted, but the student
4667: does not know if they are correct. (The ellipsis icon.)
4668:
4669: =item * B<ERROR>: There is an error retrieving information about this
4670: problem.
4671:
4672: =back
4673:
4674: =cut
4675:
4676: # This hash maps the composite status to this simple status, and
4677: # can be used directly, if you like
4678: my %compositeToSimple =
4679: (
4680: NETWORK_FAILURE() => ERROR,
4681: NOTHING_SET() => CLOSED,
4682: CORRECT() => CORRECT,
1.332 albertel 4683: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
1.224 bowersj2 4684: EXCUSED() => CORRECT,
4685: PAST_DUE_NO_ANSWER() => INCORRECT,
4686: PAST_DUE_ANSWER_LATER() => INCORRECT,
4687: ANSWER_OPEN() => INCORRECT,
4688: OPEN_LATER() => CLOSED,
4689: TRIES_LEFT() => OPEN,
4690: INCORRECT() => INCORRECT,
4691: OPEN() => OPEN,
4692: ATTEMPTED() => ATTEMPTED,
4693: ANSWER_SUBMITTED() => ATTEMPTED
4694: );
4695:
4696: sub simpleStatus {
4697: my $self = shift;
4698: my $part = shift;
4699: my $status = $self->status($part);
4700: return $compositeToSimple{$status};
1.225 bowersj2 4701: }
4702:
4703: =pod
4704:
4705: B<simpleStatusCount> will return an array reference containing, in
4706: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
4707: and ERROR parts the given problem has.
4708:
4709: =cut
4710:
4711: # This maps the status to the slot we want to increment
4712: my %statusToSlotMap =
4713: (
4714: OPEN() => 0,
4715: CLOSED() => 1,
4716: CORRECT() => 2,
4717: INCORRECT() => 3,
4718: ATTEMPTED() => 4,
4719: ERROR() => 5
4720: );
4721:
4722: sub statusToSlot { return $statusToSlotMap{shift()}; }
4723:
4724: sub simpleStatusCount {
4725: my $self = shift;
4726:
4727: my @counts = (0, 0, 0, 0, 0, 0, 0);
4728: foreach my $part (@{$self->parts()}) {
4729: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
4730: }
4731:
4732: return \@counts;
1.191 bowersj2 4733: }
4734:
4735: =pod
4736:
4737: B<Completable>
4738:
4739: The completable method represents the concept of I<whether the student can
4740: currently do the problem>. If the student can do the problem, which means
4741: that it is open, there are tries left, and if the problem is manually graded
4742: or the grade is suppressed via problemstatus, the student has not tried it
4743: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
4744: either the student has tried it and there is no feedback, or that for
4745: some reason it is no longer completable (not open yet, successfully completed,
4746: out of tries, etc.). As an example, this is used as the filter for the
4747: "Uncompleted Homework" option for the nav maps.
4748:
4749: If this does not quite meet your needs, do not fiddle with it (unless you are
4750: fixing it to better match the student's conception of "completable" because
4751: it's broken somehow)... make a new method.
4752:
4753: =cut
4754:
4755: sub completable {
4756: my $self = shift;
4757: if (!$self->is_problem()) { return 0; }
4758: my $partCount = $self->countParts();
4759:
4760: foreach my $part (@{$self->parts()}) {
4761: if ($part eq '0' && $partCount != 1) { next; }
4762: my $status = $self->status($part);
4763: # "If any of the parts are open, or have tries left (implies open),
4764: # and it is not "attempted" (manually graded problem), it is
4765: # not "complete"
1.216 bowersj2 4766: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
4767: $status == ANSWER_SUBMITTED() ) {
4768: # did this part already, as well as we can
4769: next;
4770: }
4771: if ($status == OPEN() || $status == TRIES_LEFT()) {
4772: return 1;
4773: }
1.191 bowersj2 4774: }
4775:
4776: # If all the parts were complete, so was this problem.
1.216 bowersj2 4777: return 0;
1.51 bowersj2 4778: }
4779:
4780: =pod
4781:
4782: =head2 Resource/Nav Map Navigation
4783:
4784: =over 4
4785:
1.174 albertel 4786: =item * B<getNext>():
4787:
4788: Retreive an array of the possible next resources after this
4789: one. Always returns an array, even in the one- or zero-element case.
4790:
4791: =item * B<getPrevious>():
1.85 bowersj2 4792:
1.174 albertel 4793: Retreive an array of the possible previous resources from this
4794: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 4795:
4796: =cut
4797:
4798: sub getNext {
4799: my $self = shift;
4800: my @branches;
4801: my $to = $self->to();
1.85 bowersj2 4802: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 4803: my $choice = $self->{NAV_MAP}->getById($branch);
1.342 albertel 4804: #if (!$choice->condition()) { next; }
1.51 bowersj2 4805: my $next = $choice->goesto();
4806: $next = $self->{NAV_MAP}->getById($next);
4807:
1.131 bowersj2 4808: push @branches, $next;
1.85 bowersj2 4809: }
4810: return \@branches;
4811: }
4812:
4813: sub getPrevious {
4814: my $self = shift;
4815: my @branches;
4816: my $from = $self->from();
4817: foreach my $branch ( split /,/, $from) {
4818: my $choice = $self->{NAV_MAP}->getById($branch);
4819: my $prev = $choice->comesfrom();
4820: $prev = $self->{NAV_MAP}->getById($prev);
4821:
1.131 bowersj2 4822: push @branches, $prev;
1.51 bowersj2 4823: }
4824: return \@branches;
1.131 bowersj2 4825: }
4826:
4827: sub browsePriv {
4828: my $self = shift;
4829: if (defined($self->{BROWSE_PRIV})) {
4830: return $self->{BROWSE_PRIV};
4831: }
4832:
1.311 albertel 4833: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
4834: $self->symb());
1.51 bowersj2 4835: }
4836:
4837: =pod
1.2 www 4838:
1.51 bowersj2 4839: =back
1.2 www 4840:
1.51 bowersj2 4841: =cut
1.2 www 4842:
1.51 bowersj2 4843: 1;
1.2 www 4844:
1.51 bowersj2 4845: __END__
1.2 www 4846:
4847:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonnavmaps.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / interface