# The LearningOnline Network
# Group Bulletin Boards Manager
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
package Apache::groupboards;
use strict;
use Apache::Constants qw(:common :http);
use Apache::loncommon;
use Apache::lonnet;
use Apache::lonnavmaps;
use Apache::lonuserstate;
use Apache::lonratedt;
use Apache::lonlocal;
use LONCAPA;
sub handler {
my ($r) = @_;
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
return OK if $r->header_only;
# Needs to be in a course
if (! ($env{'request.course.fn'})) {
# Not in a course
$env{'user.error.msg'}=
"/adm/groupboards:mdg:0:0:Cannot edit or view course groups";
return HTTP_NOT_ACCEPTABLE;
}
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['group']);
my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
my $now = time;
my $crstype = &Apache::loncommon::course_type();
my $gpterm = &Apache::loncommon::group_term();
my $bodytitle = &mt('[_1] Discussion Boards',$crstype);
my $group = $env{'form.group'};
if (!defined($group)) {
$r->print(&Apache::loncommon::start_page($bodytitle));
$r->print(&mt('No [_1] defined, so there are no [_1] discussion boards to display',$gpterm));
$r->print(&Apache::loncommon::end_page());
return OK;
}
my $can_create=&Apache::lonnet::allowed('cgb',$env{'request.course.id'}.
'/'.$group);
my $can_view=&Apache::lonnet::allowed('pgd',$env{'request.course.id'}.
'/'.$group);
if (defined($env{'form.newbul'})) {
if (($can_create) || (&Apache::lonnet::allowed('mdg',$env{'request.course.id'}))) {
$r->print(&Apache::loncommon::start_page($bodytitle));
my ($outcome,$symb,$newurl,$bbtitle) =
&create_board($cdom,$cnum,$group,$env{'form.newbul'});
if ($outcome eq 'ok') {
my ($furl,$ferr)= &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
$r->print(&mt('The new discussion board was added successfully.<br />'));
$r->print('<table border="0"><tr><td>'.
'<a href="'.$newurl.'?register=1&symb='.$symb.
'&group='.$group.'">'.
&mt('Edit [_1] board',$bbtitle).'</a></td>'.
'<td> </td><td>'.
'<a href="/adm/groupboards?group='.$group.'">'.
&mt('View all group discussion boards').
'</a></td></tr></table>');
} else {
$r->print(&mt('There was a problem creating the new discussion board - [_1]','<span class="LC_error">'.$outcome.'</span>').'<br /><a href="/adm/groupboards?group='.$group.'">'.
&mt('Return to discussion boards').'</a>');
}
$r->print(&Apache::loncommon::end_page());
return OK;
}
}
my $jscript;
if (($can_create) || (&Apache::lonnet::allowed('mdg',$env{'request.course.id'}))) {
$jscript = qq|
function makebulboard() {
var title=prompt('Discussion Board Title');
if (title) {
this.document.forms.newbb.newbul.value=
title+'=/adm/$cdom/$cnum/$now/bulletinboard';
this.document.forms.newbb.submit();
}
}
|;
}
$r->print(&Apache::loncommon::start_page($bodytitle,
'<script type="text/javascript">'.
$jscript.'</script>'));
if (!$can_view) {
$r->print(&mt('You do not have privileges to view discussion boards in this [_1]',$crstype));
return OK;
}
my $navmap = Apache::lonnavmaps::navmap->new();
my @groupboards;
my %boards;
my $grpbbmap = &get_bbfolder_url($cdom,$cnum,$group);
if ($grpbbmap) {
my $bbfolderres = $navmap->getResourceByUrl($grpbbmap);
if ($bbfolderres) {
my @boards = $navmap->retrieveResources($bbfolderres,undef,0,0);
foreach my $res (@boards) {
my $url = $res->src();
if ($url =~ m|^/adm/\Q$cdom\E/\Q$cnum\E/\d+/bulletinboard|) {
push(@groupboards,$res->symb());
$boards{$res->symb()} = {
title => $res->title(),
url => $res->src(),
};
}
}
}
}
if (($can_create) || (&Apache::lonnet::allowed('mdg',$env{'request.course.id'}))) {
$r->print('<form method="post" name="newbb" action="/adm/groupboards">'.
"\n".'<input type="button" name="bbbutton" value="'.
&mt('New Discussion Board').
'" onClick="javascript:makebulboard();" />'."\n".
' <input type="hidden" name="newbul" />'."\n".
' <input type="hidden" name="group" value="'.$group.'" />'.
"\n".'</form><br />');
}
if (@groupboards) {
foreach my $board (@groupboards) {
$r->print('<a href="'.$boards{$board}{'url'}.'?register=1&symb='.$board.'&group='.$group.'">'.$boards{$board}{'title'}.'</a><br />');
}
} else {
$r->print(&mt('There are currently no discussion boards in this [_1].',
$gpterm));
}
$r->print(&Apache::loncommon::end_page());
return OK;
}
sub create_board {
my ($cdom,$cnum,$group,$newboard,$symb) = @_;
my ($bbtitle,$newurl)=split(/\=/,$newboard);
$bbtitle=&unescape($bbtitle);
$newurl=&unescape($newurl);
my $allbbsmap = &get_bbfolder_url($cdom,$cnum,$group);
my ($outcome,$symb);
if ($allbbsmap =~ m|^/uploaded|) {
my ($errtext,$fatal)=&Apache::lonratedt::mapread($allbbsmap);
if (!$fatal) {
my $newidx=&Apache::lonratedt::getresidx($newurl);
$Apache::lonratedt::resources[$newidx]=$bbtitle.':'.$newurl.
':false:normal:res';
push(@Apache::lonratedt::order,$newidx);
my ($errtext,$fatal)=&Apache::lonratedt::storemap($allbbsmap,1);
if ($fatal) {
$outcome = "error: failed to store discussion boards map - $errtext\n";
} else {
$outcome = 'ok';
$symb = &Apache::lonnet::encode_symb($allbbsmap,$newidx,$newurl);
}
} else {
$outcome = "error: failed to read all discussion boards map - $errtext\n";
}
} else {
$outcome = 'error: discussion boards folder absent, '.
'or in unexpected location - '.$allbbsmap."\n";
}
return ($outcome,$symb,$newurl,$bbtitle);
}
sub get_bbfolder_url {
my ($cdom,$cnum,$group) = @_;
my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum,$group);
my $grpbbmap;
if (%curr_groups) {
my %group_info = &Apache::longroup::get_group_settings(
$curr_groups{$group});
my $creation = $group_info{'creation'};
my $bbfolder = $creation + 1;
my $crspath = '/uploaded/'.$cdom.'/'.$cnum.'/';
$grpbbmap = $crspath.'default_'.$bbfolder.'.sequence';
}
return $grpbbmap;
}
1;
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