1: # The LearningOnline Network
2: # Bulletin Board Handler
3: #
4: # $Id: lonbulletin.pm,v 1.36 2006/07/08 01:23:13 raeburn 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 LONCAPA;
40:
41: sub handler {
42: my $r = shift;
43: &Apache::loncommon::content_type($r,'text/html');
44: $r->send_http_header;
45: return OK if $r->header_only;
46: my $target=$env{'form.grade_target'};
47:
48: # ------------------------------------------------------------ Print the screen
49: if ($target eq 'tex') {
50: $r->print(&Apache::lonprintout::print_latex_header($env{'form.latex_type'}));
51: }
52: my (undef,undef,undef,undef,$marker)=split(/\//,$r->uri);
53: # Is this even in a course?
54: if (!$env{'request.course.id'}) {
55: &Apache::loncommon::simple_error_page($r,'Not in a course',
56: 'Not in a course');
57: return OK;
58: }
59:
60: $marker=~s/\D//g;
61:
62: if (!$marker) {
63: &Apache::loncommon::simple_error_page($r,'Invalid Call',
64: 'Invalid Call');
65: return OK;
66: }
67:
68: my $dom = $env{'course.'.$env{'request.course.id'}.'.domain'};
69: my $crs = $env{'course.'.$env{'request.course.id'}.'.num'};
70: my ($group,$grp_desc);
71:
72: # --------------------------------------------------------- The syllabus fields
73: my %syllabusfields=&Apache::lonlocal::texthash(
74: 'aaa_title' => 'Topic',
75: 'bbb_content' => 'Task',
76: 'ccc_webreferences' => 'Web References');
77:
78: # ------------------------------------------------------------ Get Query String
79: &Apache::loncommon::get_unprocessed_cgi
80: ($ENV{'QUERY_STRING'},['forcestudent','forceedit','register',
81: 'origpage','group']);
82: # ----------------------------------------------------- Force menu registration
83: my %addentries;
84: if ($env{'form.origpage'}) {
85: $addentries{'onload'} = "document.location='#newpost';";
86: }
87: # --------------------------------------------------------------- Force Student
88: my $forcestudent='';
89: if ($env{'form.forcestudent'}) { $forcestudent='student'; }
90:
91: my $forceedit='';
92: if ($env{'form.forceedit'}) { $forceedit='edit'; }
93:
94: my %syllabus=&Apache::lonnet::dump('bulletinpage_'.$marker,$dom,$crs);
95:
96: my $boardurl = $r->uri;
97: if ($boardurl =~ m|/adm/\Q$dom\E/\Q$crs\E/\d+/bulletinboard|) {
98: if (!exists($syllabus{'group'})) {
99: &Apache::loncommon::simple_error_page($r,'Group information missing',
100: 'Group information missing');
101:
102: return OK;
103: } else {
104: $group = $syllabus{'group'};
105: if ($group eq '') {
106: &Apache::loncommon::simple_error_page($r,'Invalid group',
107: 'Invalid group');
108: return OK;
109: }
110: my %curr_groups = &Apache::longroup::coursegroups($dom,$crs,$group);
111: if (!defined($curr_groups{$group})) {
112: &Apache::loncommon::simple_error_page($r,'Invalid group',
113: 'Invalid group');
114: return OK;
115: } else {
116: my %content = &Apache::longroup::get_group_settings(
117: $curr_groups{$group});
118: $grp_desc = &unescape($content{'description'});
119: }
120: }
121: }
122:
123: # --------------------------------------- There is such a user, get environment
124: if ($target ne 'tex') {
125: my $start_page =
126: &Apache::loncommon::start_page("Bulletin Board/Discussion",undef,
127: {'function' => $forcestudent,
128: 'add_entries' => \%addentries,
129: 'domain' => $dom,
130: 'force_register' =>
131: $env{'form.register'}});
132: $r->print($start_page);
133: if ($group ne '' && $env{'form.group'} eq $group) {
134: my $gpterm = &Apache::loncommon::group_term();
135: my $ucgpterm = $gpterm;
136: $ucgpterm =~ s/^(\w)/uc($1)/e;
137: my ($groupboards,$boards) = &Apache::longroup::get_group_bbinfo(
138: $dom,$crs,$group);
139: my $boardtitle = $$boards{$marker}{'title'};
140: $boardurl .= '?register=1&group='.$group;
141: $r->print(&groupboard_breadcrumbs($dom,$crs,$group,$gpterm,
142: $ucgpterm,$grp_desc,$boardurl,$boardtitle));
143: }
144: }
145: my ($allowed);
146: if ($group ne '') {
147: $allowed=&Apache::lonnet::allowed('mdg',$env{'request.course.id'});
148: if (!$allowed) {
149: $allowed = &Apache::lonnet::allowed('cgb',$env{'request.course.id'}.
150: '/'.$group);
151: }
152: if (!$allowed) {
153: if ((!&Apache::lonnet::allowed('vcg',$env{'request.course.id'})) &&
154: (!&Apache::lonnet::allowed('vgb',$env{'request.course.id'}.
155: '/'.$group))) {
156: &print_end_page($r,$target);
157: return OK;
158: }
159: }
160: } else {
161: $allowed=&Apache::lonnet::allowed('mdc',$env{'request.course.id'});
162: }
163:
164: my $privileged=$allowed;
165: if (($syllabus{'uploaded.lastmodified'}) && (!$forceedit)) {
166: $forcestudent='student';
167: }
168: if ($target ne 'tex') { $r->print('<table><tr><td>'); }
169: if ($forcestudent or $target eq 'tex') { $allowed=0; }
170:
171: if ($allowed) {
172: my $query_str = 'forcestudent=1';
173: if (($group ne '') && ($env{'form.group'} eq $group)) {
174: $query_str.='&group='.$group;
175: }
176: $r->print(
177: '<p>'.
178: &Apache::loncommon::help_open_topic('Uploaded_Templates_TextBoxes','Help with filling in text boxes').'<br /><a href="'.$r->uri.'?'.$query_str.'"><font size="+1">'.&mt('Show Student View').'</font></a>'.
179: &Apache::loncommon::help_open_topic('Uploaded_Templates_PublicView').'</p>');
180: } elsif ($privileged and $target ne 'tex') {
181: my $query_str = 'forceedit=edit';
182: if (($group ne '') && ($env{'form.group'} eq $group)) {
183: $query_str.='&group='.$group;
184: }
185: $r->print('<a href="'.$r->uri.'?'.$query_str.'"><font size="+1">'
186: .&mt('Edit').'</font></a>');
187: }
188:
189: if (($env{'form.uploaddoc.filename'}) &&
190: ($env{'form.storeupl'}) && ($allowed)) {
191: if ($env{'form.uploaddoc.filename'}=~/\.(gif|jpg|png|jpeg)$/i) {
192: if ($syllabus{'uploaded.photourl'}) {
193: &Apache::lonnet::removeuploadedurl($syllabus{'uploaded.photourl'});
194: }
195: $syllabus{'uploaded.photourl'}=
196: &Apache::lonnet::userfileupload('uploaddoc',1,'bulletin');
197: }
198: $syllabus{'uploaded.lastmodified'}=time;
199: &Apache::lonnet::put('bulletinpage_'.$marker,\%syllabus,$dom,$crs);
200: }
201: if (($allowed) && ($env{'form.storesyl'})) {
202: foreach (keys %syllabusfields) {
203: my $field=$env{'form.'.$_};
204: $field=~s/\s+$//s;
205: $field=&Apache::lonfeedback::clear_out_html($field,1);
206: $syllabus{$_}=$field;
207: }
208: $syllabus{'uploaded.lastmodified'}=time;
209: &Apache::lonnet::put('bulletinpage_'.$marker,\%syllabus,$dom,$crs);
210: }
211:
212: # ---------------------------------------------------------------- Get syllabus
213: if (($syllabus{'uploaded.lastmodified'}) || ($allowed)) {
214: if ($syllabus{'uploaded.photourl'}) {
215: &Apache::lonnet::allowuploaded('/adm/syllabus',
216: $syllabus{'uploaded.photourl'});
217: $r->print('<img src="'.$syllabus{'uploaded.photourl'}.
218: '" align="right" />');
219: }
220: if ($allowed) {
221: $r->print(
222: '<form method="post" enctype="multipart/form-data">'.
223: '<input type="hidden" name="forceedit" value="edit" />'.
224: '<h3>'.&mt('Upload a Photo').'</h3>'.
225: '<input type="file" name="uploaddoc" size="50">'.
226: '<input type="submit" name="storeupl" value="'.&mt('Upload').'">'.
227: '</form><form method="post">');
228: }
229: foreach (sort keys %syllabusfields) {
230: if (($syllabus{$_}) || ($allowed)) {
231: my $message=$syllabus{$_};
232: &Apache::lonfeedback::newline_to_br(\$message);
233: $message
234: =~s/(https*\:\/\/[^\s]+)/\<a href=\"$1\"\>\<tt\>$1\<\/tt\>\<\/a\>/g;
235: if ($allowed) {
236: $message=&Apache::lonspeller::markeduptext($message);
237: }
238: $message=&Apache::lontexconvert::msgtexconverted($message);
239: unless ($_ eq 'aaa_title') {
240: if (($_ ne 'bbb_content') || ($allowed)) {
241: if ($target ne 'tex') {
242: $r->print('<h3>'.$syllabusfields{$_}.'</h3>');
243: } else {
244: $r->print('\\\\\textbf{'.$syllabusfields{$_}.'}\\\\');
245: }
246: }
247: if ($target ne 'tex') {
248: $r->print('<blockquote>'.
249: $message.'</blockquote>');
250: } else {
251: $r->print(' '.&Apache::lonxml::xmlparse($r,'tex',$message).' ');
252: }
253: if ($allowed) {
254: $r->print('<br /><textarea cols="80" rows="10" name="'.$_.'">'.
255: $syllabus{$_}.
256: '</textarea><input type="submit" name="storesyl" value="'.&mt('Store').'" />');
257: }
258: } else {
259: if ($target ne 'tex') {
260: $r->print('<h1>'.$message.'</h1>');
261: } else {
262: $r->print('\\\\\textbf{'.&Apache::lonxml::xmlparse($r,'tex',$message).'}\\\\');
263: }
264: if ($allowed) {
265: $r->print(
266: '<br />'.&mt('Topic').'<br /><textarea cols="80" rows="2" name="'.$_.'">'.
267: $syllabus{$_}.
268: '</textarea><input type="submit" name="storesyl" value="'.&mt('Store').'" />');
269: }
270: }
271: }
272: }
273: if ($allowed) {
274: $r->print('</form>');
275: }
276: if ($target ne 'tex') {$r->print('</p>');} else {$r->print('\\\\');}
277: } else {
278: $r->print('<p>'.&mt('No page information provided.').'</p>');
279: }
280: if ($target ne 'tex') { $r->print('</td></tr></table>'); }
281: if ($target ne 'tex') {
282: $r->print(&Apache::lonfeedback::list_discussion
283: ('board','OPEN','bulletin___'.$marker.'___'.
284: $r->uri));
285: } else {
286: $r->print('\\\\'.&Apache::lonxml::xmlparse($r,'tex',&Apache::lonfeedback::list_discussion
287: ('board','OPEN','bulletin___'.$marker.'___'.
288: $r->uri)));
289: }
290: &print_end_page($r,$target);
291: return OK;
292: }
293:
294: sub print_end_page {
295: my ($r,$target) = @_;
296: if ($target ne 'tex') {
297: $r->print(&Apache::loncommon::end_page());
298: } else {
299: $r->print('\end{document}');
300: }
301: }
302:
303: sub groupboard_breadcrumbs {
304: my ($cdom,$cnum,$group,$gpterm,$ucgpterm,$description,$boardurl,$boardtitle)= @_;
305: &Apache::lonhtmlcommon::clear_breadcrumbs();
306: &Apache::lonhtmlcommon::add_breadcrumb
307: ({href=>"/adm/$cdom/$cnum/$group/smppg",
308: text=>"$ucgpterm: $description",
309: title=>"Go to group's home page"},
310: {href=>"/adm/groupboards?group=$group",
311: text=>"Discussion Boards",
312: title=>"Display group discussion boards"},
313: {href=>"$boardurl",
314: text=>"$boardtitle",
315: title=>"$boardtitle"},
316: );
317: my $output .= &Apache::lonhtmlcommon::breadcrumbs(&mt('[_1] discussion boards - [_2]',$gpterm,$description));
318: return $output;
319: }
320:
321: 1;
322: __END__
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