1: # The LearningOnline Network
2: # Bulletin Board Handler
3: #
4: # $Id: lonbulletin.pm,v 1.49 2009/11/19 18:05:32 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: package Apache::lonbulletin;
30:
31: use strict;
32: use Apache::Constants qw(:common);
33: use Apache::loncommon;
34: use Apache::lonnet;
35: use Apache::lontexconvert;
36: use Apache::lonfeedback;
37: use Apache::lonlocal;
38: use Apache::lonhtmlcommon;
39: use HTML::Entities();
40: use LONCAPA;
41:
42: sub handler {
43: my $r = shift;
44: &Apache::loncommon::content_type($r,'text/html');
45: $r->send_http_header;
46: return OK if $r->header_only;
47: my $target=$env{'form.grade_target'};
48:
49: # ------------------------------------------------------------ Print the screen
50: if ($target eq 'tex') {
51: $r->print(&Apache::lonprintout::print_latex_header($env{'form.latex_type'}));
52: }
53: my (undef,undef,undef,undef,$marker)=split(/\//,$r->uri);
54: # Is this even in a course?
55: if (!$env{'request.course.id'}) {
56: &Apache::loncommon::simple_error_page($r,'Not in a course',
57: 'Not in a course');
58: return OK;
59: }
60:
61: $marker=~s/\D//g;
62:
63: if (!$marker) {
64: &Apache::loncommon::simple_error_page($r,'Invalid Call',
65: 'Invalid Call');
66: return OK;
67: }
68:
69: my $dom = $env{'course.'.$env{'request.course.id'}.'.domain'};
70: my $crs = $env{'course.'.$env{'request.course.id'}.'.num'};
71: my ($group,$grp_desc);
72:
73: # --------------------------------------------------------- The syllabus fields
74: my %syllabusfields=&Apache::lonlocal::texthash(
75: 'aaa_title' => 'Topic',
76: 'bbb_content' => 'Task',
77: 'ccc_webreferences' => 'Web References');
78:
79: # ------------------------------------------------------------ Get Query String
80: &Apache::loncommon::get_unprocessed_cgi
81: ($ENV{'QUERY_STRING'},['forcestudent','forceedit','register',
82: 'origpage','group','ref']);
83: # ----------------------------------------------------- Force menu registration
84: my %addentries;
85: if ($env{'form.origpage'}) {
86: $addentries{'onload'} = "document.location='#newpost';";
87: }
88: # --------------------------------------------------------------- Force Student
89: my $forcestudent='';
90: if ($env{'form.forcestudent'}) { $forcestudent='student'; }
91:
92: my $forceedit='';
93: if ($env{'form.forceedit'}) { $forceedit='edit'; }
94: my $refarg = '';
95: if (exists($env{'form.ref'})) { $refarg = 'ref='.$env{'form.ref'}; }
96:
97: my %syllabus=&Apache::lonnet::dump('bulletinpage_'.$marker,$dom,$crs);
98:
99: my $boardurl = $r->uri;
100: if ($boardurl =~ m|/adm/\Q$dom\E/\Q$crs\E/\d+/bulletinboard|) {
101: if (!exists($syllabus{'group'})) {
102: &Apache::loncommon::simple_error_page($r,'Group information missing',
103: 'Group information missing');
104:
105: return OK;
106: } else {
107: $group = $syllabus{'group'};
108: if ($group eq '') {
109: &Apache::loncommon::simple_error_page($r,'Invalid group',
110: 'Invalid group');
111: return OK;
112: }
113: my %curr_groups = &Apache::longroup::coursegroups($dom,$crs,$group);
114: if (!defined($curr_groups{$group})) {
115: &Apache::loncommon::simple_error_page($r,'Invalid group',
116: 'Invalid group');
117: return OK;
118: } else {
119: my %content = &Apache::longroup::get_group_settings(
120: $curr_groups{$group});
121: $grp_desc = &unescape($content{'description'});
122: }
123: }
124: }
125:
126: # --------------------------------------- There is such a user, get environment
127: if ($target ne 'tex') {
128: my $course_or_group;
129: if($group eq '') {
130: $course_or_group="Course";
131: } else {
132: $course_or_group="Group";
133: }
134: my $start_page =
135: &Apache::loncommon::start_page("$course_or_group Discussion Board",undef,
136: {'function' => $forcestudent,
137: 'add_entries' => \%addentries,
138: 'domain' => $dom,
139: 'force_register' =>
140: $env{'form.register'}});
141: $r->print($start_page);
142: if ($group ne '' && $env{'form.group'} eq $group) {
143: my $gpterm = &Apache::loncommon::group_term();
144: my $ucgpterm = $gpterm;
145: $ucgpterm =~ s/^(\w)/uc($1)/e;
146: my ($groupboards,$boards) =
147: &Apache::longroup::get_group_bbinfo($dom,$crs,$group,$boardurl);
148: my $boardtitle;
149: if ((ref($groupboards) eq 'ARRAY') && (@{$groupboards} > 0)) {
150: $boardtitle = $$boards{$$groupboards[0]}{'title'};
151: }
152: $boardurl .= '?register=1&group='.$group;
153: $r->print(&groupboard_breadcrumbs($dom,$crs,$group,$refarg,$gpterm,
154: $ucgpterm,$grp_desc,$boardurl,$boardtitle));
155: }
156: }
157: my ($allowed);
158: if ($group ne '') {
159: $allowed=&Apache::lonnet::allowed('mdg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''));
160: if (!$allowed) {
161: $allowed = &Apache::lonnet::allowed('cgb',$env{'request.course.id'}.
162: '/'.$group);
163: }
164: if (!$allowed) {
165: if ((!&Apache::lonnet::allowed('vcg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) &&
166: (!&Apache::lonnet::allowed('vgb',$env{'request.course.id'}.
167: '/'.$group))) {
168: &print_end_page($r,$target);
169: return OK;
170: }
171: }
172: } else {
173: $allowed=&Apache::lonnet::allowed('mdc',$env{'request.course.id'});
174: }
175:
176: my $privileged=$allowed;
177: if (($syllabus{'uploaded.lastmodified'}) && (!$forceedit)) {
178: $forcestudent='student';
179: }
180: if ($target ne 'tex') { $r->print('<table><tr><td>'); }
181: if ($forcestudent or $target eq 'tex') { $allowed=0; }
182:
183: if ($allowed) {
184: my $query_str = 'forcestudent=1';
185: if (($group ne '') && ($env{'form.group'} eq $group)) {
186: $query_str.='&group='.$group.'&'.$refarg;
187: }
188: $r->print(
189: '<p>'.
190: &Apache::loncommon::help_open_topic('Uploaded_Templates_TextBoxes',&mt('Help with filling in text boxes')).'<br /><a href="'.$r->uri.'?'.$query_str.'"><font size="+1">'.&mt('Show Student View').'</font></a>'.
191: &Apache::loncommon::help_open_topic('Uploaded_Templates_PublicView').'</p>');
192: } elsif ($privileged and $target ne 'tex') {
193: my $query_str = 'forceedit=edit';
194: if (($group ne '') && ($env{'form.group'} eq $group)) {
195: $query_str.='&group='.$group.'&'.$refarg;
196: }
197: $r->print('<a href="'.$r->uri.'?'.$query_str.'"><font size="+1">'
198: .&mt('Edit').'</font></a>');
199: }
200:
201: if (($env{'form.uploaddoc.filename'}) &&
202: ($env{'form.storeupl'}) && ($allowed)) {
203: if ($env{'form.uploaddoc.filename'}=~/\.(gif|jpg|png|jpeg)$/i) {
204: if ($syllabus{'uploaded.photourl'}) {
205: &Apache::lonnet::removeuploadedurl($syllabus{'uploaded.photourl'});
206: }
207: if ($group ne '') {
208: $syllabus{'uploaded.photourl'}=
209: &Apache::lonnet::userfileupload('uploaddoc',1,
210: 'bulletin/'.$group.'/'.$marker);
211: } else {
212: $syllabus{'uploaded.photourl'}=
213: &Apache::lonnet::userfileupload('uploaddoc',1,
214: 'bulletin/'.$marker);
215: }
216: }
217: $syllabus{'uploaded.lastmodified'}=time;
218: &Apache::lonnet::put('bulletinpage_'.$marker,\%syllabus,$dom,$crs);
219: }
220: if (($allowed) && ($env{'form.storesyl'})) {
221: foreach my $syl_field (keys(%syllabusfields)) {
222: my $field=$env{'form.'.$syl_field};
223: $field=~s/\s+$//s;
224: $field=&Apache::lonfeedback::clear_out_html($field,1);
225: $syllabus{$syl_field}=$field;
226: }
227: $syllabus{'uploaded.lastmodified'}=time;
228: &Apache::lonnet::put('bulletinpage_'.$marker,\%syllabus,$dom,$crs);
229: }
230:
231: # ---------------------------------------------------------------- Get syllabus
232: if (($syllabus{'uploaded.lastmodified'}) || ($allowed)) {
233: if ($syllabus{'uploaded.photourl'}) {
234: &Apache::lonnet::allowuploaded('/adm/syllabus',
235: $syllabus{'uploaded.photourl'});
236: $r->print('<img src="'.$syllabus{'uploaded.photourl'}.
237: '" align="right" />');
238: }
239: if ($allowed) {
240: $r->print(
241: '<form method="post" enctype="multipart/form-data">'.
242: '<input type="hidden" name="forceedit" value="edit" />'.
243: '<h3>'.&mt('Upload a Photo').'</h3>'.
244: '<input type="file" name="uploaddoc" size="50" />'.
245: '<input type="submit" name="storeupl" value="'.&mt('Upload').'" />'.
246: '</form><form method="post">'.
247: '<input type="hidden" name="forceedit" value="edit" />');
248: }
249: foreach my $field (sort(keys(%syllabusfields))) {
250: if (($syllabus{$field}) || ($allowed)) {
251: my $message=$syllabus{$field};
252: &Apache::lonfeedback::newline_to_br(\$message);
253: $message
254: =~s/(https*\:\/\/[^\s]+)/\<a href=\"$1\"\>\<tt\>$1\<\/tt\>\<\/a\>/g;
255: if ($allowed) {
256: $message=&Apache::lonspeller::markeduptext($message);
257: }
258: $message=&Apache::lontexconvert::msgtexconverted($message);
259: unless ($field eq 'aaa_title') {
260: if (($field ne 'bbb_content') || ($allowed)) {
261: if ($target ne 'tex') {
262: $r->print('<h3>'.$syllabusfields{$field}.'</h3>');
263: } else {
264: $r->print('\\\\\textbf{'.$syllabusfields{$field}.'}\\\\');
265: }
266: }
267: if ($target ne 'tex') {
268: $r->print('<blockquote>'.
269: $message.'</blockquote>');
270: } else {
271: $r->print(' '.&Apache::lonxml::xmlparse($r,'tex',$message).' ');
272: }
273: if ($allowed) {
274: $r->print('<br /><textarea cols="80" rows="10" name="'.$field.'">'.
275: &HTML::Entities::encode($syllabus{$field},'&"<>').
276: '</textarea><input type="submit" name="storesyl" value="'.&mt('Save').'" />');
277: }
278: } else {
279: if ($target ne 'tex') {
280: $r->print('<h1>'.$message.'</h1>');
281: } else {
282: $r->print('\\\\\textbf{'.&Apache::lonxml::xmlparse($r,'tex',$message).'}\\\\');
283: }
284: if ($allowed) {
285: $r->print(
286: '<br />'.&mt('Topic').'<br /><textarea cols="80" rows="2" name="'.$field.'">'.
287: &HTML::Entities::encode($syllabus{$field},'&"<>').
288: '</textarea><input type="submit" name="storesyl" value="'.&mt('Save').'" />');
289: }
290: }
291: }
292: }
293: if ($allowed) {
294: $r->print('</form>');
295: }
296: if ($target ne 'tex') {$r->print('</p>');} else {$r->print('\\\\');}
297: } else {
298: $r->print('<p>'.&mt('No page information provided.').'</p>');
299: }
300: if ($target ne 'tex') { $r->print('</td></tr></table>'); }
301: if ($target ne 'tex') {
302: $r->print(&Apache::lonfeedback::list_discussion
303: ('board','OPEN','bulletin___'.$marker.'___'.
304: $r->uri,undef,$group));
305: } else {
306: $r->print('\\\\'.&Apache::lonxml::xmlparse($r,'tex',&Apache::lonfeedback::list_discussion
307: ('board','OPEN','bulletin___'.$marker.'___'.
308: $r->uri,undef,$group)));
309: }
310: &print_end_page($r,$target);
311: return OK;
312: }
313:
314: sub print_end_page {
315: my ($r,$target) = @_;
316: if ($target ne 'tex') {
317: $r->print(&Apache::loncommon::end_page());
318: } else {
319: $r->print('\end{document}');
320: }
321: }
322:
323: sub groupboard_breadcrumbs {
324: my ($cdom,$cnum,$group,$refarg,$gpterm,$ucgpterm,$description,$boardurl,
325: $boardtitle)= @_;
326: &Apache::lonhtmlcommon::clear_breadcrumbs();
327: if ($refarg ne '') {
328: &Apache::lonhtmlcommon::add_breadcrumb
329: ({href=>"/adm/coursegroups",
330: text=>"Groups",
331: title=>"View course groups"});
332: }
333: &Apache::lonhtmlcommon::add_breadcrumb
334: ({href=>"/adm/$cdom/$cnum/$group/smppg?$refarg",
335: text=>"$ucgpterm: $description",
336: title=>"Go to group's home page"},
337: {href=>"/adm/groupboards?group=$group&$refarg",
338: text=>"Discussion Boards",
339: title=>"Display group discussion boards"},
340: {href=>"$boardurl",
341: text=>"$boardtitle",
342: title=>"$boardtitle"},
343: );
344: my $output .= &Apache::lonhtmlcommon::breadcrumbs(&mt('[_1] discussion boards - [_2]',$gpterm,$description));
345: return $output;
346: }
347:
348: 1;
349: __END__
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