1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
3: #
4: # $Id: lonnavdisplay.pm,v 1.18 2010/06/24 14:21:39 bisitz Exp $
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: #
28: ###
29:
30: package Apache::lonnavdisplay;
31:
32: use strict;
33: use Apache::Constants qw(:common :http);
34: use Apache::lonmenu();
35: use Apache::loncommon();
36: use Apache::lonnavmaps();
37: use Apache::lonhtmlcommon();
38: use Apache::lonnet;
39: use Apache::lonlocal;
40: use Time::HiRes qw( gettimeofday tv_interval );
41:
42: sub handler {
43: my $r = shift;
44: real_handler($r);
45: }
46:
47: sub real_handler {
48: my $r = shift;
49: #my $t0=[&gettimeofday()];
50: # Handle header-only request
51: if ($r->header_only) {
52: if ($env{'browser.mathml'}) {
53: &Apache::loncommon::content_type($r,'text/xml');
54: } else {
55: &Apache::loncommon::content_type($r,'text/html');
56: }
57: $r->send_http_header;
58: return OK;
59: }
60:
61: # Send header, don't cache this page
62: if ($env{'browser.mathml'}) {
63: &Apache::loncommon::content_type($r,'text/xml');
64: } else {
65: &Apache::loncommon::content_type($r,'text/html');
66: }
67: &Apache::loncommon::no_cache($r);
68:
69: my %toplinkitems=();
70:
71: # Create the nav map
72: my $navmap = Apache::lonnavmaps::navmap->new();
73:
74: if (!defined($navmap)) {
75: my $requrl = $r->uri;
76: $env{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";
77: $env{'user.reinit'} = 1;
78: return HTTP_NOT_ACCEPTABLE;
79: }
80: $r->send_http_header;
81:
82: # ------------------------------------------------------------ Get query string
83: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['sort','showOnlyHomework','postsymb','register']);
84:
85: # ----------------------------------------------------- Force menu registration
86: # Header
87: my $course_type = &Apache::loncommon::course_type();
88: my $title = $course_type . ' Contents';
89: my ($start_page,$args);
90: if ($env{'form.register'}) {
91: $args = {'force_register' => $env{'form.register'}};
92: $start_page = &Apache::loncommon::start_page($title,undef,$args);
93: } else {
94: my $brcrum = [{href => '/adm/navmaps',
95: text => &mt($course_type . ' Contents'),
96: no_mt => 1},
97: ];
98: $args = {'bread_crumbs' => $brcrum};
99: $start_page = &Apache::loncommon::start_page($title,undef,$args);
100: }
101: $r->print($start_page.
102: '<script type="text/javascript">window.focus();</script>');
103: $r->rflush();
104:
105: # Check that it's defined
106: if (!($navmap->courseMapDefined())) {
107: $r->print(&Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',undef,'RAT'));
108: $r->print('<span class="LC_error">'.&mt('Coursemap undefined.').
109: '</span>' .
110: &Apache::loncommon::end_page());
111: return OK;
112: }
113:
114: # See if there's only one map in the top-level, if we don't
115: # already have a filter... if so, automatically display it
116: # (older code; should use retrieveResources)
117: if ($ENV{QUERY_STRING} !~ /filter/) {
118: my $iterator = $navmap->getIterator(undef, undef, undef, 0);
119: my $curRes;
120: my $sequenceCount = 0;
121: my $sequenceId;
122: while ($curRes = $iterator->next()) {
123: if (ref($curRes) && $curRes->is_sequence()) {
124: $sequenceCount++;
125: $sequenceId = $curRes->map_pc();
126: }
127: }
128:
129: if ($sequenceCount == 1) {
130: # The automatic iterator creation in the render call
131: # will pick this up. We know the condition because
132: # the defined($env{'form.filter'}) also ensures this
133: # is a fresh call.
134: $env{'form.filter'} = "$sequenceId";
135: }
136: }
137:
138: # Check to see if the student is jumping to next open, do-able problem
139: if ($ENV{QUERY_STRING} =~ /^jumpToFirstHomework/) {
140: # Find the next homework problem that they can do.
141: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
142: my $curRes;
143: my $foundDoableProblem = 0;
144: my $minimumduedate;
145: my $now = time();
146:
147: while ($curRes = $iterator->next()) {
148: if (ref($curRes) && $curRes->is_problem()) {
149: my $status = $curRes->status();
150: my $thisduedate=$curRes->duedate();
151: if ($thisduedate > $now
152: && $curRes->completable()) {
153:
154: $foundDoableProblem = 1;
155:
156: if (!defined($minimumduedate)
157: || $thisduedate<$minimumduedate) {
158: # Pop open all previous maps
159: my $stack = $iterator->getStack();
160: pop @$stack; # last resource in the stack is the problem
161: # itself, which we don't need in the map stack
162: my @mapPcs = map {$_->map_pc()} @$stack;
163: $env{'form.filter'} = join(',', @mapPcs);
164:
165: # Mark as both "here" and "jump"
166: $env{'form.postsymb'} = $curRes->symb();
167: $minimumduedate=$thisduedate;
168: }
169: }
170: }
171: }
172:
173: # If we found no problems, print a note to that effect.
174: if (!$foundDoableProblem) {
175: $r->print("<span class=\"LC_info\">"
176: .&mt("All homework assignments have been completed.")
177: ."</span>");
178: }
179: } else {
180: my $link = 'navmaps?jumpToFirstHomework';
181: if ($env{'form.register'}) {
182: $link .= '&register='.$env{'form.register'};
183: }
184: &Apache::lonnavmaps::add_linkitem(\%toplinkitems,'firsthomework',
185: 'location.href="'.$link.'"',
186: "Show my first due problem");
187: }
188:
189: my $suppressEmptySequences = 0;
190: my $filterFunc = undef;
191: my $resource_no_folder_link = 0;
192:
193: # Display only due homework.
194: my $showOnlyHomework = 0;
195: if ($env{'form.showOnlyHomework'} eq "1") {
196: $showOnlyHomework = 1;
197: $suppressEmptySequences = 1;
198: $filterFunc = sub { my $res = shift;
199: return $res->completable() || $res->is_map();
200: };
201: my $link = 'navmaps?sort='.$env{'form.sort'};
202: if ($env{'form.register'}) {
203: $link .= '&register='.$env{'form.register'};
204: }
205: &Apache::lonnavmaps::add_linkitem(\%toplinkitems,'everything',
206: 'location.href="'.$link.'"',
207: 'Show everything');
208: $r->print("<span class=\"LC_info\">".&mt("Uncompleted Problems")."</span>");
209: $env{'form.filter'} = '';
210: $env{'form.condition'} = 1;
211: $resource_no_folder_link = 1;
212: } else {
213: my $link = 'navmaps?sort='.$env{'form.sort'}.'&showOnlyHomework=1';
214: if ($env{'form.register'}) {
215: $link .= '&register='.$env{'form.register'};
216: }
217: &Apache::lonnavmaps::add_linkitem(\%toplinkitems,'uncompleted',
218: 'location.href="'.$link.'"',
219: 'Show only uncompleted problems');
220: }
221:
222: my %selected=($env{'form.sort'} => ' selected="selected"');
223: my $sort_html=('<form name="sortForm" action="">
224: <span class="LC_nobreak">
225: <input type="hidden" name="showOnlyHomework" value="'.$env{'form.showOnlyHomework'}.'" />
226: '.&mt('Sort by:').'
227: <select name="sort" onchange="document.sortForm.submit()">
228: <option value="default"'.$selected{'default'}.'>'.&mt('Default').'</option>
229: <option value="title"'.$selected{'title'}.'>'.&mt('Title').'</option>
230: <option value="duedate"'.$selected{'duedate'}.'>'.&mt('Duedate').'</option>
231: <option value="discussion"'.$selected{'discussion'}.'>'.&mt('Has New Discussion').'</option>
232: </select>
233: <input type="hidden" name="register" value="'.$env{'form.register'}.'" />
234: </span>
235: </form>');
236: # renderer call
237: my $renderArgs = { 'cols' => [0,1,2,3],
238: 'sort' => $env{'form.sort'},
239: 'url' => '/adm/navmaps',
240: 'navmap' => $navmap,
241: 'suppressNavmap' => 1,
242: 'suppressEmptySequences' => $suppressEmptySequences,
243: 'filterFunc' => $filterFunc,
244: 'resource_no_folder_link' => $resource_no_folder_link,
245: 'sort_html'=> $sort_html,
246: 'r' => $r,
247: 'caller' => 'navmapsdisplay',
248: 'linkitems' => \%toplinkitems};
249: my $render = &Apache::lonnavmaps::render($renderArgs);
250:
251: # If no resources were printed, print a reassuring message so the
252: # user knows there was no error.
253: if ($renderArgs->{'counter'} == 0) {
254: if ($showOnlyHomework) {
255: $r->print("<p><span class=\"LC_info\">".&mt("All homework is currently completed.")."</span></p>");
256: } else { # both jumpToFirstHomework and normal use the same: course must be empty
257: $r->print("<p><span class=\"LC_info\">".&mt("This course is empty.")."</span></p>");
258: }
259: }
260: #my $td=&tv_interval($t0);
261: #$r->print("<br />$td");
262:
263: $r->print(&Apache::loncommon::end_page());
264: $r->rflush();
265:
266: return OK;
267: }
268:
269: 1;
270: __END__
271:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonnavdisplay.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / interface