# The LearningOnline Network
# Bulletin Board Handler
#
# $Id: lonbulletin.pm,v 1.52 2009/12/03 02:13:28 www Exp $
#
# 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::lonbulletin;
use strict;
use Apache::Constants qw(:common);
use Apache::loncommon;
use Apache::lonnet;
use Apache::lontexconvert;
use Apache::lonfeedback;
use Apache::lonlocal;
use Apache::lonhtmlcommon;
use HTML::Entities();
use LONCAPA;
sub handler {
my $r = shift;
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
return OK if $r->header_only;
my $target=$env{'form.grade_target'};
# ------------------------------------------------------------ Print the screen
if ($target eq 'tex') {
$r->print(&Apache::lonprintout::print_latex_header($env{'form.latex_type'}));
}
my (undef,undef,undef,undef,$marker)=split(/\//,$r->uri);
# Is this even in a course?
if (!$env{'request.course.id'}) {
&Apache::loncommon::simple_error_page($r,'Not in a course',
'Not in a course');
return OK;
}
$marker=~s/\D//g;
if (!$marker) {
&Apache::loncommon::simple_error_page($r,'Invalid Call',
'Invalid Call');
return OK;
}
my $dom = $env{'course.'.$env{'request.course.id'}.'.domain'};
my $crs = $env{'course.'.$env{'request.course.id'}.'.num'};
my ($group,$grp_desc);
# --------------------------------------------------------- The syllabus fields
my %syllabusfields=&Apache::lonlocal::texthash(
'aaa_title' => 'Topic',
'bbb_content' => 'Task',
'ccc_webreferences' => 'Web References');
# ------------------------------------------------------------ Get Query String
&Apache::loncommon::get_unprocessed_cgi
($ENV{'QUERY_STRING'},['forcestudent','forceedit','register',
'origpage','group','ref']);
# ----------------------------------------------------- Force menu registration
my %addentries;
if ($env{'form.origpage'}) {
$addentries{'onload'} = "document.location='#newpost';";
}
# --------------------------------------------------------------- Force Student
my $forcestudent='';
if ($env{'form.forcestudent'}) { $forcestudent='student'; }
my $forceedit='';
if ($env{'form.forceedit'}) { $forceedit='edit'; }
my $refarg = '';
if (exists($env{'form.ref'})) { $refarg = 'ref='.$env{'form.ref'}; }
my %syllabus=&Apache::lonnet::dump('bulletinpage_'.$marker,$dom,$crs);
my $boardurl = $r->uri;
if ($boardurl =~ m|/adm/\Q$dom\E/\Q$crs\E/\d+/bulletinboard|) {
if (!exists($syllabus{'group'})) {
&Apache::loncommon::simple_error_page($r,'Group information missing',
'Group information missing');
return OK;
} else {
$group = $syllabus{'group'};
if ($group eq '') {
&Apache::loncommon::simple_error_page($r,'Invalid group',
'Invalid group');
return OK;
}
my %curr_groups = &Apache::longroup::coursegroups($dom,$crs,$group);
if (!defined($curr_groups{$group})) {
&Apache::loncommon::simple_error_page($r,'Invalid group',
'Invalid group');
return OK;
} else {
my %content = &Apache::longroup::get_group_settings(
$curr_groups{$group});
$grp_desc = &unescape($content{'description'});
}
}
}
# --------------------------------------- There is such a user, get environment
if ($target ne 'tex') {
my $course_or_group;
if($group eq '') {
$course_or_group="Course";
} else {
$course_or_group="Group";
}
my $start_page =
&Apache::loncommon::start_page("$course_or_group Discussion Board",undef,
{'function' => $forcestudent,
'add_entries' => \%addentries,
'domain' => $dom,
'force_register' =>
$env{'form.register'}});
$r->print($start_page);
if ($group ne '' && $env{'form.group'} eq $group) {
my $gpterm = &Apache::loncommon::group_term();
my $ucgpterm = $gpterm;
$ucgpterm =~ s/^(\w)/uc($1)/e;
my ($groupboards,$boards) =
&Apache::longroup::get_group_bbinfo($dom,$crs,$group,$boardurl);
my $boardtitle;
if ((ref($groupboards) eq 'ARRAY') && (@{$groupboards} > 0)) {
$boardtitle = $$boards{$$groupboards[0]}{'title'};
}
$boardurl .= '?register=1&group='.$group;
$r->print(&groupboard_breadcrumbs($dom,$crs,$group,$refarg,$gpterm,
$ucgpterm,$grp_desc,$boardurl,$boardtitle));
}
}
my ($allowed);
if ($group ne '') {
$allowed=&Apache::lonnet::allowed('mdg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''));
if (!$allowed) {
$allowed = &Apache::lonnet::allowed('cgb',$env{'request.course.id'}.
'/'.$group);
}
if (!$allowed) {
if ((!&Apache::lonnet::allowed('vcg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) &&
(!&Apache::lonnet::allowed('vgb',$env{'request.course.id'}.
'/'.$group))) {
&print_end_page($r,$target);
return OK;
}
}
} else {
$allowed=&Apache::lonnet::allowed('mdc',$env{'request.course.id'});
}
my $privileged=$allowed;
if (($syllabus{'uploaded.lastmodified'}) && (!$forceedit)) {
$forcestudent='student';
}
if ($target ne 'tex') { $r->print('<table><tr><td>'); }
if ($forcestudent or $target eq 'tex') { $allowed=0; }
if ($allowed) {
my $query_str = 'forcestudent=1';
if (($group ne '') && ($env{'form.group'} eq $group)) {
$query_str.='&group='.$group.'&'.$refarg;
}
$r->print(
'<p>'.
&Apache::loncommon::help_open_topic('Uploaded_Templates_TextBoxes',&mt('Help with filling in text boxes')).'<br /><a href="'.$r->uri.'?'.$query_str.'"><font size="+1">'.&mt('Show Student View').'</font></a>'.
&Apache::loncommon::help_open_topic('Uploaded_Templates_PublicView').'</p>');
} elsif ($privileged and $target ne 'tex') {
my $query_str = 'forceedit=edit';
if (($group ne '') && ($env{'form.group'} eq $group)) {
$query_str.='&group='.$group.'&'.$refarg;
}
$r->print('<a href="'.$r->uri.'?'.$query_str.'"><font size="+1">'
.&mt('Edit').'</font></a>');
}
if (($env{'form.uploaddoc.filename'}) &&
($env{'form.storeupl'}) && ($allowed)) {
if ($env{'form.uploaddoc.filename'}=~/\.(gif|jpg|png|jpeg)$/i) {
if ($syllabus{'uploaded.photourl'}) {
&Apache::lonnet::removeuploadedurl($syllabus{'uploaded.photourl'});
}
if ($group ne '') {
$syllabus{'uploaded.photourl'}=
&Apache::lonnet::userfileupload('uploaddoc',1,
'bulletin/'.$group.'/'.$marker);
} else {
$syllabus{'uploaded.photourl'}=
&Apache::lonnet::userfileupload('uploaddoc',1,
'bulletin/'.$marker);
}
}
$syllabus{'uploaded.lastmodified'}=time;
&Apache::lonnet::put('bulletinpage_'.$marker,\%syllabus,$dom,$crs);
}
if (($allowed) && ($env{'form.storesyl'})) {
foreach my $syl_field (keys(%syllabusfields)) {
my $field=$env{'form.'.$syl_field};
$field=~s/\s+$//s;
$field=&Apache::lonfeedback::clear_out_html($field,1);
$syllabus{$syl_field}=$field;
}
$syllabus{'uploaded.lastmodified'}=time;
&Apache::lonnet::put('bulletinpage_'.$marker,\%syllabus,$dom,$crs);
}
# ---------------------------------------------------------------- Get syllabus
if (($syllabus{'uploaded.lastmodified'}) || ($allowed)) {
if ($syllabus{'uploaded.photourl'}) {
&Apache::lonnet::allowuploaded('/adm/syllabus',
$syllabus{'uploaded.photourl'});
$r->print('<img src="'.$syllabus{'uploaded.photourl'}.
'" align="right" />');
}
if ($allowed) {
$r->print(
'<form method="post" enctype="multipart/form-data">'.
'<input type="hidden" name="forceedit" value="edit" />'.
'<h3>'.&mt('Upload a Photo').'</h3>'.
'<input type="file" name="uploaddoc" size="50" />'.
'<input type="submit" name="storeupl" value="'.&mt('Upload').'" />'.
'</form><form method="post">'.
'<input type="hidden" name="forceedit" value="edit" />');
}
foreach my $field (sort(keys(%syllabusfields))) {
if (($syllabus{$field}) || ($allowed)) {
my $message=$syllabus{$field};
if (!&Apache::lonfeedback::contains_block_html($message)) {
&Apache::lonfeedback::newline_to_br(\$message);
}
$message=&Apache::lonhtmlcommon::raw_href_to_link($message);
if ($allowed) {
$message=&Apache::lonspeller::markeduptext($message);
}
$message=&Apache::lontexconvert::msgtexconverted($message);
unless ($field eq 'aaa_title') {
if (($field ne 'bbb_content') || ($allowed)) {
if ($target ne 'tex') {
$r->print('<h3>'.$syllabusfields{$field}.'</h3>');
} else {
$r->print('\\\\\textbf{'.$syllabusfields{$field}.'}\\\\');
}
}
if ($target ne 'tex') {
$r->print('<blockquote>'.
$message.'</blockquote>');
} else {
$r->print(' '.&Apache::lonxml::xmlparse($r,'tex',$message).' ');
}
if ($allowed) {
$r->print('<br /><textarea cols="80" rows="10" name="'.$field.'">'.
&HTML::Entities::encode($syllabus{$field},'&"<>').
'</textarea><input type="submit" name="storesyl" value="'.&mt('Save').'" />');
}
} else {
if ($target ne 'tex') {
$r->print('<h1>'.$message.'</h1>');
} else {
$r->print('\\\\\textbf{'.&Apache::lonxml::xmlparse($r,'tex',$message).'}\\\\');
}
if ($allowed) {
$r->print(
'<br />'.&mt('Topic').'<br /><textarea cols="80" rows="2" name="'.$field.'">'.
&HTML::Entities::encode($syllabus{$field},'&"<>').
'</textarea><input type="submit" name="storesyl" value="'.&mt('Save').'" />');
}
}
}
}
if ($allowed) {
$r->print('</form>');
}
if ($target ne 'tex') {$r->print('</p>');} else {$r->print('\\\\');}
} else {
$r->print('<p>'.&mt('No page information provided.').'</p>');
}
if ($target ne 'tex') { $r->print('</td></tr></table>'); }
if ($target ne 'tex') {
$r->print(&Apache::lonfeedback::list_discussion
('board','OPEN','bulletin___'.$marker.'___'.
$r->uri,undef,$group));
} else {
$r->print('\\\\'.&Apache::lonxml::xmlparse($r,'tex',&Apache::lonfeedback::list_discussion
('board','OPEN','bulletin___'.$marker.'___'.
$r->uri,undef,$group)));
}
&print_end_page($r,$target);
return OK;
}
sub print_end_page {
my ($r,$target) = @_;
if ($target ne 'tex') {
$r->print(&Apache::loncommon::end_page());
} else {
$r->print('\end{document}');
}
}
sub groupboard_breadcrumbs {
my ($cdom,$cnum,$group,$refarg,$gpterm,$ucgpterm,$description,$boardurl,
$boardtitle)= @_;
&Apache::lonhtmlcommon::clear_breadcrumbs();
if ($refarg ne '') {
&Apache::lonhtmlcommon::add_breadcrumb
({href=>"/adm/coursegroups",
text=>"Groups",
title=>"View course groups"});
}
&Apache::lonhtmlcommon::add_breadcrumb
({href=>"/adm/$cdom/$cnum/$group/smppg?$refarg",
text=>"$ucgpterm: $description",
title=>"Go to group's home page"},
{href=>"/adm/groupboards?group=$group&$refarg",
text=>"Discussion Boards",
title=>"Display group discussion boards"},
{href=>"$boardurl",
text=>"$boardtitle",
title=>"$boardtitle"},
);
my $output .= &Apache::lonhtmlcommon::breadcrumbs(&mt('[_1] discussion boards - [_2]',$gpterm,$description));
return $output;
}
1;
__END__
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