# The LearningOnline Network
# Documents
#
# $Id: londocs.pm,v 1.10 2002/08/26 12:44:45 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::londocs;

use strict;
use Apache::Constants qw(:common);
use Apache::lonnet;
use Apache::loncommon;
use Apache::lonratedt;
use Apache::lonratsrv;

my $iconpath;

# Mapread read maps into lonratedt::global arrays 
# @order and @resources, determines status
# sets @order - pointer to resources in right order
# sets @resources - array with the resources with correct idx
#

sub mapread {
    my ($coursenum,$coursedom,$map)=@_;
    return
      &Apache::lonratedt::mapread('/uploaded/'.$coursedom.'/'.$coursenum.'/'.
                                $map);
}

sub storemap {
    my ($coursenum,$coursedom,$map)=@_;
    return
      &Apache::lonratedt::storemap('/uploaded/'.$coursedom.'/'.$coursenum.'/'.
                                $map);
}

sub editor {
    my ($r,$coursenum,$coursedom,$folder,$allowed)=@_;
    my $errtext='';
    my $fatal=0;
    ($errtext,$fatal)=
          &mapread($coursenum,$coursedom,$folder.'.sequence');
    if ($fatal) {
	   $r->print('<p><font color="red">'.$errtext.'</font></p>');
    } else {
# ------------------------------------------------------------ Process commands
	if ($allowed) {
# upload a file, if present
           if (($ENV{'form.uploaddoc.filename'}) &&
               ($ENV{'form.cmd'}=~/^upload_(\w+)/)) {
	    if ($folder=~/^$1/) {
# this is for a course, not a user, so set coursedoc flag
# probably the only place in the system where this should be "1"
	      my $url=&Apache::lonnet::userfileupload('uploaddoc',1);
              my $ext='false';
              if ($url=~/^http\:\/\//) { $ext='true'; }
              $url=~s/\:/\&colon;/g;
	      my $comment=$ENV{'form.comment'};
              $comment=~s/\</\&lt\;/g;
              $comment=~s/\>/\&gt\;/g;
              $comment=~s/\:/\&colon;/g;
              my $newidx=$#Apache::lonratedt::resources+1;
              $Apache::lonratedt::resources[$newidx]=
                  $comment.':'.$url.':'.$ext.':normal:res';
              $Apache::lonratedt::order[$#Apache::lonratedt::order+1]=
                                                              $newidx;       
 	      &storemap($coursenum,$coursedom,$folder.'.sequence');
	     }
            }
	    if ($ENV{'form.cmd'}) {
                my ($cmd,$idx)=split(/\_/,$ENV{'form.cmd'});
                if ($cmd eq 'del') {
		    for (my $i=$idx;$i<$#Apache::lonratedt::order;$i++) {
                        $Apache::lonratedt::order[$i]=
                          $Apache::lonratedt::order[$i+1];
                    }
                    $#Apache::lonratedt::order--;
                } elsif ($cmd eq 'up') {
                    my $i=$Apache::lonratedt::order[$idx-1];
                    $Apache::lonratedt::order[$idx-1]=
			$Apache::lonratedt::order[$idx];
                    $Apache::lonratedt::order[$idx]=$i;
                } elsif ($cmd eq 'down') {
                    my $i=$Apache::lonratedt::order[$idx+1];
                    $Apache::lonratedt::order[$idx+1]=
			$Apache::lonratedt::order[$idx];
                    $Apache::lonratedt::order[$idx]=$i;
                }
# Store the changed version
		&storemap($coursenum,$coursedom,$folder.'.sequence');
            }
	}
# ---------------------------------------------------------------- Print screen
        my $idx=0;
        $r->print('<table>');
        foreach (@Apache::lonratedt::order) {
           my ($name,$url)=split(/\:/,$Apache::lonratedt::resources[$_]);
           unless ($name) {  $name=(split(/\//,$url))[-1]; }
           unless ($name) { $name='EMPTY'; }
           $r->print(&entryline($idx,$name,$url,$folder,$allowed));
           $idx++;
        }
        $r->print('</table>');
    }
}

# --------------------------------------------------------------- An entry line

sub entryline {
    my ($index,$title,$url,$folder,$allowed)=@_;
    my $line='<tr>';
# Edit commands
    if ($allowed) {
       $line.=(<<END);
<td><table border='0' cellspacing='0' cellpadding='0'>
<tr><td><a href='/adm/coursedocs?folder=$folder&cmd=up_$index'>
<img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
<tr><td><a href='/adm/coursedocs?folder=$folder&cmd=down_$index'>
<img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
</table></td><td>
<a href='/adm/coursedocs?folder=$folder&cmd=del_$index'>Remove</td>
END
    }
# URL
    if ($url=~/^\/*uploaded\//) {
	$url=&Apache::lonnet::tokenwrapper($url);
    }
    $line.='<td><a href="'.$url.'">View</a></td>';
# Title
    $title=&Apache::lonnet::unescape($title);
    if ($title=~
 /^(\d+)\_\_\_\&\&\&\_\_\_(\w+)\_\_\_\&\&\&\_\_\_(\w+)\_\_\_\&\&\&\_\_\_(.*)$/
	) { $title='<i>'.localtime($1).'</i> '.$2.' at '.$3.': <br>'.
		&Apache::lontexconvert::msgtexconverted($4);
	}
    $line.="<td>$title</td>";
    $line.='</tr>';
    return $line;
}

# ================================================================ Main Handler
sub handler {
    my $r = shift;
    $r->content_type('text/html');
    $r->send_http_header;
    return OK if $r->header_only;

# is this a standard course?

    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['folder']);
    my $standard=($ENV{'request.course.uri'}=~/^\/uploaded\//);
    my $forcestandard=($ENV{'form.folder'}=~/^default_/);
    my $forcesupplement=($ENV{'form.folder'}=~/^supplemental_/);

# does this user have privileges to post, etc?
    my $allowed=&Apache::lonnet::allowed('srm',$ENV{'request.course.id'});
    my $script='';
    if ($allowed) { 
       &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['cmd']);
       $script=&Apache::lonratedt::editscript('docs'); 
    }

# get course data
    my $coursenum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my $coursedom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};

# graphics settings

    $iconpath = $r->dir_config('lonIconsURL') . "/";

# print screen
    $r->print(<<ENDDOCUMENT);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
<script>$script</script>
</head>
ENDDOCUMENT
$r->print(&Apache::loncommon::bodytag('Course Documents'));
# --------------------------------------------------0------ Standard documents
    if (($standard) && ($allowed) && (!$forcesupplement)) {
       $r->print('<h2>Main Course Documents</h2>');
       my $folder=$ENV{'form.folder'};
       unless ($folder=~/^default/) { $folder='default'; }
       &editor($r,$coursenum,$coursedom,$folder,$allowed);
       $r->print(<<ENDFORM);
<h3>Post a new main course document</h3>
<form action="/adm/coursedocs" method="post" enctype="multipart/form-data">
<input type="file" name="uploaddoc" size="50">
<br />
Title: <input type="text" size="50" name="comment">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="cmd" value="upload_default">
<input type="submit" value="Upload Document">
</form>
ENDFORM
       $r->print('<hr />');
    }
# ----------------------------------------------------- Supplemental documents
    if (!$forcestandard) {
       $r->print('<h2>Supplemental Course Documents</h2>');
       my $folder=$ENV{'form.folder'};
       unless ($folder=~/supplemental/) { $folder='supplemental'; }
       &editor($r,$coursenum,$coursedom,$folder,$allowed);
       if ($allowed) {
          $r->print(<<ENDSUPFORM);
<h3>Post a new supplemental course document</h3>
<form action="/adm/coursedocs" method="post" enctype="multipart/form-data">
<input type="file" name="uploaddoc" size="50">
<br />Comment:<br />
<textarea cols=50 rows=4 name='comment'>
</textarea>
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="cmd" value="upload_supplemental">
<input type="submit" value="Upload Document">
</form>
ENDSUPFORM
       }
    }

    $r->print('</body></html>');
    return OK;
} 

1;
__END__