Annotation of loncom/interface/groupboards.pm, revision 1.14
1.1 raeburn 1: # The LearningOnline Network
2: # Group Bulletin Boards Manager
3: #
1.14 ! bisitz 4: # $Id: groupboards.pm,v 1.14 2009/02/13 16:45:00 bisitz Exp $
! 5: #
1.1 raeburn 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::groupboards;
1.2 albertel 30:
1.1 raeburn 31: use strict;
32: use Apache::Constants qw(:common :http);
1.10 albertel 33: use Apache::loncommon();
1.1 raeburn 34: use Apache::lonnet;
1.10 albertel 35: use Apache::lonuserstate();
36: use LONCAPA::map();
1.1 raeburn 37: use Apache::lonlocal;
38: use LONCAPA;
39:
40: sub handler {
41: my ($r) = @_;
42: &Apache::loncommon::content_type($r,'text/html');
43: $r->send_http_header;
44: return OK if $r->header_only;
45:
46: # Needs to be in a course
47: if (! ($env{'request.course.fn'})) {
48: # Not in a course
49: $env{'user.error.msg'}=
50: "/adm/groupboards:mdg:0:0:Cannot edit or view course groups";
51: return HTTP_NOT_ACCEPTABLE;
52: }
53:
54: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.7 raeburn 55: ['group','ref']);
1.1 raeburn 56:
57: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
58: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
59: my $now = time;
60: my $crstype = &Apache::loncommon::course_type();
61: my $gpterm = &Apache::loncommon::group_term();
1.5 raeburn 62: my $ucgpterm = $gpterm;
63: $ucgpterm =~ s/^(\w)/uc($1)/e;
1.13 schafran 64: my $bodytitle = $ucgpterm.' Discussion Boards';
1.1 raeburn 65: my $group = $env{'form.group'};
1.5 raeburn 66: $group =~ s/\W//g;
1.7 raeburn 67: my ($description,$earlyout,$refarg);
68:
69: if (exists($env{'form.ref'})) {
70: $refarg = 'ref='.$env{'form.ref'};
71: }
1.5 raeburn 72:
73: &Apache::lonhtmlcommon::clear_breadcrumbs();
1.1 raeburn 74: if (!defined($group)) {
1.5 raeburn 75: $earlyout = &mt('No [_1] defined, so there are no [_1] discussion boards to display',$gpterm);
76: $r->print(&display_error($cdom,$cnum,$group,$description,$gpterm,
1.7 raeburn 77: $ucgpterm,$bodytitle,$earlyout,$refarg));
1.5 raeburn 78: return OK;
79: }
80: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum,$group);
81: if (!defined($curr_groups{$group})) {
1.8 raeburn 82: $earlyout = &mt('Invalid group');
1.5 raeburn 83: $r->print(&display_error($cdom,$cnum,$group,$description,$gpterm,
1.7 raeburn 84: $ucgpterm,$bodytitle,$earlyout,$refarg));
1.1 raeburn 85: return OK;
86: }
1.5 raeburn 87: my %content = &Apache::longroup::get_group_settings($curr_groups{$group});
1.6 albertel 88: $description = &unescape($content{'description'});
1.5 raeburn 89:
1.1 raeburn 90: my $can_create=&Apache::lonnet::allowed('cgb',$env{'request.course.id'}.
91: '/'.$group);
1.7 raeburn 92: my $can_view = &Apache::lonnet::allowed('vcg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''));
1.5 raeburn 93:
94: if (!$can_view) {
1.7 raeburn 95: $can_view = &Apache::lonnet::allowed('vgb',$env{'request.course.id'}.
1.1 raeburn 96: '/'.$group);
1.5 raeburn 97: }
98: if (!$can_view) {
99: $earlyout=&mt('You do not have privileges to view discussion boards in this [_1]',$gpterm);
100: $r->print(&display_error($cdom,$cnum,$group,$description,$gpterm,
1.7 raeburn 101: $ucgpterm,$bodytitle,$earlyout,$refarg));
1.5 raeburn 102: return OK;
103: }
1.1 raeburn 104: if (defined($env{'form.newbul'})) {
105: if (($can_create) || (&Apache::lonnet::allowed('mdg',$env{'request.course.id'}))) {
1.5 raeburn 106: $r->print(&boards_header($cdom,$cnum,$group,$description,$gpterm,
1.7 raeburn 107: $ucgpterm,$bodytitle,$refarg));
1.8 raeburn 108: my ($outcome,$newurl,$bbtitle,$dellockoutcome) =
1.2 albertel 109: &create_board($cdom,$cnum,$group,$env{'form.newbul'});
1.1 raeburn 110: if ($outcome eq 'ok') {
111: my ($furl,$ferr)= &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
112: $r->print(&mt('The new discussion board was added successfully.<br />'));
113: $r->print('<table border="0"><tr><td>'.
1.7 raeburn 114: '<a href="'.$newurl.'?group='.$group.'&'.$refarg.
115: '">'.&mt('Edit [_1] board',$bbtitle).'</a></td>'.
1.1 raeburn 116: '<td> </td><td>'.
1.7 raeburn 117: '<a href="/adm/groupboards?group='.$group.'&'.
118: $refarg.'">'.&mt('View all group discussion boards').
1.1 raeburn 119: '</a></td></tr></table>');
1.8 raeburn 120: if ($dellockoutcome ne 'ok') {
121: $r->print(&mt('There was a problem removing a lockfile for the group ([_1]). This may prevent creation of additional bulletin boards in this group. Please contact the system administrator for your LON-CAPA domain.'));
122: }
1.1 raeburn 123: } else {
1.2 albertel 124: $r->print(&mt('There was a problem creating the new discussion board - [_1]','<span class="LC_error">'.$outcome.'</span>').'<br /><a href="/adm/groupboards?group='.$group.'">'.
1.1 raeburn 125: &mt('Return to discussion boards').'</a>');
126: }
127: $r->print(&Apache::loncommon::end_page());
128: return OK;
129: }
130: }
131: my $jscript;
132: if (($can_create) || (&Apache::lonnet::allowed('mdg',$env{'request.course.id'}))) {
133: $jscript = qq|
1.5 raeburn 134: <script type="text/javascript">
1.1 raeburn 135: function makebulboard() {
136: var title=prompt('Discussion Board Title');
137: if (title) {
1.8 raeburn 138: this.document.forms.newbb.newbul.value=title;
1.1 raeburn 139: this.document.forms.newbb.submit();
140: }
141: }
1.5 raeburn 142: </script>
1.1 raeburn 143: |;
144: }
1.5 raeburn 145: $r->print(&boards_header($cdom,$cnum,$group,$description,$gpterm,$ucgpterm,
1.7 raeburn 146: $bodytitle,$refarg,$jscript));
1.4 raeburn 147: my ($groupboards,$boards) = &Apache::longroup::get_group_bbinfo($cdom,$cnum,
148: $group);
1.1 raeburn 149: if (($can_create) || (&Apache::lonnet::allowed('mdg',$env{'request.course.id'}))) {
1.5 raeburn 150: $r->print('<br /><form method="post" name="newbb" action="/adm/groupboards">'.
1.1 raeburn 151: "\n".'<input type="button" name="bbbutton" value="'.
152: &mt('New Discussion Board').
153: '" onClick="javascript:makebulboard();" />'."\n".
1.7 raeburn 154: '<input type="hidden" name="newbul" />'."\n".
155: '<input type="hidden" name="group" value="'.$group.'" />'.
156: '<input type="hidden" name="ref" value="'.$env{'form.ref'}.'" />'.
1.1 raeburn 157: "\n".'</form><br />');
158: }
1.4 raeburn 159: if (@{$groupboards} > 0) {
1.12 bisitz 160: $r->print('<br />'
161: .&Apache::loncommon::start_data_table()
162: .&Apache::loncommon::start_data_table_header_row()
163: .'<th>'.&mt('Discussion Boards').'</th>'
164: .&Apache::loncommon::end_data_table_header_row()
165: );
1.4 raeburn 166: foreach my $board (@{$groupboards}) {
1.5 raeburn 167: my $board_url = $$boards{$board}{'url'};
168: if ($board_url =~ /\?/) {
169: $board_url .= '&group='.$group;
170: } else {
171: $board_url .= '?group='.$group;
172: }
1.12 bisitz 173: $r->print(&Apache::loncommon::start_data_table_row()
174: .'<td>'
175: .'<a href="'.$board_url.'&'.$refarg.'">'
176: .$$boards{$board}{'title'}.'</a>'
177: .'</td>'
178: .&Apache::loncommon::end_data_table_row()
179: );
1.1 raeburn 180: }
1.12 bisitz 181: $r->print(&Apache::loncommon::end_data_table());
1.1 raeburn 182: } else {
1.12 bisitz 183: $r->print('<p class="LC_info">'
184: .&mt('There are currently no discussion boards in this '.$gpterm.'.',)
185: .'</p>'
186: );
1.1 raeburn 187: }
188: $r->print(&Apache::loncommon::end_page());
189: return OK;
190: }
191:
192: sub create_board {
1.8 raeburn 193: my ($cdom,$cnum,$group,$bbtitle) = @_;
194: my ($outcome,$boardid,$newurl);
195: $bbtitle=&unescape($bbtitle);
196: # get lock on nohist_groupboards file
197: my $lockhash = {
198: $group."\0".'locked_boardids' => $env{'user.name'}.
199: ':'.$env{'user.domain'},
200: };
201: my $tries = 0;
202: my $gotlock = &Apache::lonnet::newput('nohist_groupboards',$lockhash,$cdom,$cnum);
203: my $dellockoutcome;
204: while (($gotlock ne 'ok') && $tries <3) {
205: $tries ++;
206: sleep 1;
207: $gotlock = &Apache::lonnet::newput('nohist_groupboards',$lockhash,$cdom,$cnum);
208: }
209: if ($gotlock eq 'ok') {
210: my %curr_boards = &Apache::lonnet::dump('nohist_groupboards',$cdom,$cnum,$group);
211: $boardid = time;
212: my $idtries = 0;
213: while(exists($curr_boards{$group."\0".$boardid}) && $idtries < 20) {
214: $boardid ++;
215: $idtries ++;
216: }
217: if (!exists($curr_boards{$group."\0".$boardid})) {
218: my %new_board = (
219: $group."\0".$boardid => $env{'user.name'}.':'.
220: $env{'user.domain'},
221: );
222: my $putresult = &Apache::lonnet::put('nohist_groupboards',\%new_board,
223: $cdom,$cnum);
224: if ($putresult ne 'ok') {
1.11 albertel 225: $outcome = 'error saving new board: '.$putresult;
1.8 raeburn 226: } else {
227: $newurl = '/adm/'.$cdom.'/'.$cnum.'/'.$boardid.
228: '/bulletinboard';
229: }
230: } else {
231: $outcome = ('error: no unique ID for the new board available.');
232: }
233: # remove lock
234: my @del_lock = ($group."\0".'locked_boardids');
235: $dellockoutcome = &Apache::lonnet::del('nohist_groupboards',\@del_lock,$cdom,$cnum);
236: } else {
237: $outcome = "error: could not obtain lockfile\n";
238: $dellockoutcome = 'ok';
239: }
240: if (!$newurl) {
241: return ($outcome,$newurl,$bbtitle,$dellockoutcome);
1.5 raeburn 242: }
1.1 raeburn 243: $newurl=&unescape($newurl);
1.8 raeburn 244: # need to check here if group_boards_$group.sequence is in the course
245: # if not - add it as an item in group_folder_$group.sequence
1.4 raeburn 246: my $allbbsmap = &Apache::longroup::get_bbfolder_url($cdom,$cnum,$group);
1.1 raeburn 247: if ($allbbsmap =~ m|^/uploaded|) {
1.10 albertel 248: my ($errtext,$fatal)=&LONCAPA::map::mapread($allbbsmap);
1.1 raeburn 249: if (!$fatal) {
1.10 albertel 250: my $newidx=&LONCAPA::map::getresidx($newurl);
251: $LONCAPA::map::resources[$newidx]=$bbtitle.':'.$newurl.
1.1 raeburn 252: ':false:normal:res';
1.10 albertel 253: push(@LONCAPA::map::order,$newidx);
254: my ($errtext,$fatal)=&LONCAPA::map::storemap($allbbsmap,1);
1.1 raeburn 255: if ($fatal) {
1.11 albertel 256: $outcome = "error: failed to save discussion boards map - $errtext\n";
1.1 raeburn 257: } else {
1.5 raeburn 258: my %boardinfo = (
259: 'group' => $group,
260: );
261: $outcome = &Apache::lonnet::put('bulletinpage_'.$boardid,
262: \%boardinfo,$cdom,$cnum);
1.1 raeburn 263: }
264: } else {
1.2 albertel 265: $outcome = "error: failed to read all discussion boards map - $errtext\n";
1.1 raeburn 266: }
267: } else {
1.2 albertel 268: $outcome = 'error: discussion boards folder absent, '.
1.1 raeburn 269: 'or in unexpected location - '.$allbbsmap."\n";
270: }
1.8 raeburn 271: return ($outcome,$newurl,$bbtitle,$dellockoutcome);
1.1 raeburn 272: }
273:
1.5 raeburn 274: sub display_error {
1.7 raeburn 275: my ($cdom,$cnum,$group,$description,$gpterm,$ucgpterm,$bodytitle,$earlyout,
276: $refarg)=@_;
1.5 raeburn 277: my $output = &boards_header($cdom,$cnum,$group,$description,$gpterm,
1.7 raeburn 278: $ucgpterm,$bodytitle,$refarg);
1.5 raeburn 279: $output .= $earlyout;
280: $output .= &Apache::loncommon::end_page();
281: return $output;
282: }
283:
284: sub boards_header {
1.7 raeburn 285: my ($cdom,$cnum,$group,$description,$gpterm,$ucgpterm,$bodytitle,$refarg,
286: $jscript)=@_;
1.5 raeburn 287: my $output = &Apache::loncommon::start_page($bodytitle,$jscript);
1.7 raeburn 288: if ($refarg) {
289: &Apache::lonhtmlcommon::add_breadcrumb
290: ({href=>"/adm/coursegroups",
291: text=>"Groups",
292: title=>"View course groups"},);
293: }
1.5 raeburn 294: &Apache::lonhtmlcommon::add_breadcrumb
1.7 raeburn 295: ({href=>"/adm/$cdom/$cnum/$group/smppg?$refarg",
1.5 raeburn 296: text=>"$ucgpterm: $description",
297: title=>"Go to group's home page"},
1.7 raeburn 298: {href=>"/adm/groupboards?group=$group&$refarg",
1.5 raeburn 299: text=>"Discussion Boards",
300: title=>"Display group discussion boards"},);
301: $output .= &Apache::lonhtmlcommon::breadcrumbs(&mt('[_1] discussion boards - [_2]',$gpterm,$description));
302: return $output;
303: }
304:
1.1 raeburn 305: 1;
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