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# The LearningOnline Network
# Documents
#
# $Id: londocs.pm,v 1.25 2002/10/10 17:17:11 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;
use Apache::lonxml;

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,1);
}

sub editor {
    my ($r,$coursenum,$coursedom,$folder,$allowed)=@_;
    if ($ENV{'form.foldername'}) {
	$r->print('<h3>Folder: '.$ENV{'form.foldername'}.'</h3>');
    }
    my $errtext='';
    my $fatal=0;
    ($errtext,$fatal)=
          &mapread($coursenum,$coursedom,$folder.'.sequence');
    if ($#Apache::lonratedt::order<1) {
       	$Apache::lonratedt::order[0]=1;
        $Apache::lonratedt::resources[1]='';
    }
    if ($fatal) {
	   $r->print('<p><font color="red">'.$errtext.'</font></p>');
    } else {
# ------------------------------------------------------------ Process commands
# ---------------- if they are for this folder and user allowed to make changes
	if (($allowed) && ($ENV{'form.folder'} eq $folder)) {
# upload a file, if present
           if (($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;
              $comment=~s/\:/\&colon;/g;
              if ($folder=~/^supplemental/) {
		  $comment=time.'___&&&___'.$ENV{'user.name'}.'___&&&___'.
		      $ENV{'user.domain'}.'___&&&___'.$comment;
              }
              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');
            }
# Group import/search
	    if ($ENV{'form.importdetail'}) {
               foreach (split(/\&/,$ENV{'form.importdetail'})) {
                  if (defined($_)) {
	             my ($name,$url)=split(/\=/,$_);
                     $name=&Apache::lonnet::unescape($name);
                     $url=&Apache::lonnet::unescape($url);
                     if ($url) {
	                my $idx=$#Apache::lonratedt::resources+1;
                        $Apache::lonratedt::order
                           [$#Apache::lonratedt::order+1]=$idx;
                        my $ext='false';
                        if ($url=~/^http\:\/\//) { $ext='true'; }
                        $url=~s/\:/\&colon;/g;
                        $Apache::lonratedt::resources[$idx]=
                           $name.':'.$url.':'.$ext.':normal:res';
	             }
                 }
	      }
# Store the changed version
		&storemap($coursenum,$coursedom,$folder.'.sequence');
            }
       }
# ---------------------------------------------------------------- End commands
# ---------------------------------------------------------------- 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_$index'>Remove</td>
END
    }
# Figure out what kind of a resource this is
    my ($extension)=($url=~/\.(\w+)$/);
    my $uploaded=($url=~/^\/*uploaded\//);
    my $icon='unknown';
    if (-e "/home/httpd/html/adm/lonIcons/$extension.gif") {
	$icon=$extension;
    }
    my $isfolder=0;
    if ($uploaded) {
       if ($extension eq 'sequence') {
	  $icon='folder_closed';
          $url=~/\/(\w+)\.sequence/;
          $url='/adm/coursedocs?folder='.$1;
          $isfolder=1;
       } else {
	  $url=&Apache::lonnet::tokenwrapper($url);
       } 
    }
    $url=~s/^http\&colon\;\/\//\/adm\/wrapper\/ext\//;
# Title
    $title=&Apache::lonnet::unescape($title);
    my $foldertitle=$title;
    if ($title=~
 /^(\d+)\_\_\_\&\&\&\_\_\_(\w+)\_\_\_\&\&\&\_\_\_(\w+)\_\_\_\&\&\&\_\_\_(.*)$/
	) { 
            $foldertitle=&Apache::lontexconvert::msgtexconverted($4);
            $title='<i>'.localtime($1).'</i> '.
                &Apache::loncommon::plainname($2,$3).': <br>'.
		$foldertitle;
	}
    if ($isfolder) { $url.='&foldername='.$foldertitle; }
    $line.='<td bgcolor="#FFFFBB"><a href="'.$url.'" target="cat_'.$folder.
'"><img src="/adm/lonIcons/'.
        $icon.'.gif" border="0"></a></td>'.
        "<td bgcolor='#FFFFBB'><a href='$url' target='cat_$folder'>$title</a></td></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?

    my $standard=($ENV{'request.course.uri'}=~/^\/uploaded\//);
    my $forcestandard;
    my $forcesupplement;
    my $script='';
    my $allowed;
    my $events='';
    my $showdoc=0;
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
       ['folder','foldername']);
    if ($r->uri=~/^\/adm\/coursedocs\/showdoc\/(.*)$/) {
       $showdoc=$1;
    }
    unless ($showdoc) { # got called from remote
       $forcestandard=($ENV{'form.folder'}=~/^default_/);
       $forcesupplement=($ENV{'form.folder'}=~/^supplemental_/);

# does this user have privileges to post, etc?
       $allowed=&Apache::lonnet::allowed('srm',$ENV{'request.course.id'});
       if ($allowed) { 
         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['cmd']);
         $script=&Apache::lonratedt::editscript('simple'); 
       }
    } else { # got called in sequence from course
       $allowed=0;
       $script='</script>'.&Apache::lonxml::registerurl(1,undef).'<script>';
       $events='onLoad="'.&Apache::lonxml::loadevents.
           '" onUnload="'.&Apache::lonxml::unloadevents.'"';
    }

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

# get personal data
 
    my $uname=$ENV{'user.name'};
    my $udom=$ENV{'user.domain'};
    my $plainname=&Apache::lonnet::escape(
                     &Apache::loncommon::plainname($uname,$udom));

# graphics settings

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

    my $now=time;

# print screen
    $r->print(<<ENDDOCUMENT);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
<script>
$script
</script>
ENDDOCUMENT
   if ($allowed) {
    $r->print(<<ENDNEWSCRIPT);
<script>
function makenewfolder(targetform,folderseq) {
    var foldername=prompt('Name of New Folder','New Folder');
    if (foldername) {
	targetform.importdetail.value=foldername+"="+folderseq;
        targetform.submit();
    }
}

function makenewext(targetname) {
    this.document.forms.extimport.useform.value=targetname;
    window.open('/adm/rat/extpickframe.html');
}

function makesmppage() {
    var title=prompt('Listed Title for the Page');
    this.document.forms.newsmppg.importdetail.value=
	title+'=/adm/$udom/$uname/$now/smppg';
    this.document.forms.newsmppg.submit();
}

function makebulboard() {
    var title=prompt('Listed Title for the Bulletin Board');
    this.document.forms.newbul.importdetail.value=
	title+'=/adm/$udom/$uname/$now/bulletinboard';
    this.document.forms.newbul.submit();
}

function finishpick() {
    var title=this.document.forms.extimport.title.value;
    var url=this.document.forms.extimport.url.value;
    var form=this.document.forms.extimport.useform.value;
    eval
     ('this.document.forms.'+form+'.importdetail.value="'+title+'='+url+
    '";this.document.forms.'+form+'.submit();');
}
</script>
ENDNEWSCRIPT
  }
# -------------------------------------------------------------------- Body tag
  $r->print('</head>'.
            &Apache::loncommon::bodytag('Course Documents','',$events));
  unless ($showdoc) {
    if ($allowed) {
       $r->print(<<ENDCOURSEVERIFY);
<form name="courseverify">
<input type="submit" name="verify" value="Verify Content" />
<input type="submit" name="versions" value="Check Resource Versions" />
</form>
ENDCOURSEVERIFY
    }
# --------------------------------------------------------- Standard documents
    $r->print('<table>');
    if (($standard) && ($allowed) && (!$forcesupplement)) {
       $r->print('<tr><td bgcolor="#FFFFBB"><h2>Main Course Documents</h2>');
       my $folder=$ENV{'form.folder'};
       unless ($folder=~/^default/) { $folder='default'; }
       &editor($r,$coursenum,$coursedom,$folder,$allowed);
       my $folderseq='/uploaded/'.$coursedom.'/'.$coursenum.'/default_'.time.
                     '.sequence';
       $r->print(<<ENDFORM);
<table cellspacing=2><tr>
<th bgcolor="#DDDDDD">Upload a new main course document</th>
<th bgcolor="#DDDDDD">Import a published document</th>
<th bgcolor="#DDDDDD">Special documents</th>
</tr>
<tr><td bgcolor="#DDDDDD">
File:<br />
<form action="/adm/coursedocs" method="post" enctype="multipart/form-data">
<input type="file" name="uploaddoc" size="50">
<br />
Title:<br /> 
<input type="text" size="50" name="comment">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type="hidden" name="cmd" value="upload_default">
<input type="submit" value="Upload Document">
</form>
</td>
<td bgcolor="#DDDDDD">
<form action="/adm/coursedocs" method="post" name="simpleedit">
<input type="hidden" name="folder" value="$folder">
<input type=hidden name="importdetail" value="">
<input type=button onClick=
"javascript:groupsearch()" value="Search">
<input type=button onClick=
"javascript:groupimport();" value="Import">
</form>
</td><td bgcolor="#DDDDDD">
<form action="/adm/coursedocs" method="post" name="newfolder">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" value="">
<input name="newfolder" type="button"
onClick="javascript:makenewfolder(this.form,'$folderseq');"
value="New Folder" />
</form>
<form action="/adm/coursedocs" method="post" name="newext">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" value="">
<input name="newext" type="button" onClick="javascript:makenewext('newext');"
value="External Resource" />
</form>
<form action="/adm/coursedocs" method="post" name="newsyl">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" 
value="Syllabus=/public/$coursedom/$coursenum/syllabus">
<input name="newsyl" type="submit" value="Syllabus" />
</form>
<form action="/adm/coursedocs" method="post" name="newnav">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" 
value="Navigate Content=/adm/navmaps">
<input name="newnav" type="submit" value="Navigate Content" />
</form>
<form action="/adm/coursedocs" method="post" name="newsmppg">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" value="">
<input name="newsmppg" type="button" value="Simple Page"
onClick="javascript:makesmppage();" />
</form>
<form action="/adm/coursedocs" method="post" name="newbul">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" value="">
<input name="newbulletin" type="button" value="Bulletin Board"
onClick="javascript:makebulboard();" />
</form>
<form action="/adm/coursedocs" method="post" name="newaboutme">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" 
value="$plainname=/adm/$udom/$uname/aboutme">
<input name="newaboutme" type="submit" value="My Personal Info" />
</form>
</td></tr>
</table>
ENDFORM
       $r->print('</td></tr>');
    }
# ----------------------------------------------------- Supplemental documents
    if (!$forcestandard) {
       $r->print(
  '<tr><td bgcolor="#BBFFFF"><h2>Supplemental Course Documents</h2>');
       my $folder=$ENV{'form.folder'};
       unless ($folder=~/supplemental/) { $folder='supplemental'; }
       &editor($r,$coursenum,$coursedom,$folder,$allowed);
       if ($allowed) {
       my $folderseq=
                  '/uploaded/'.$coursedom.'/'.$coursenum.'/supplemental_'.time.
                     '.sequence';

          $r->print(<<ENDSUPFORM);
<table cellspacing=2><tr>
<th bgcolor="#DDDDDD">Upload a new supplemental course document</th>
<th bgcolor="#DDDDDD">Import a published document</th>
<th bgcolor="#DDDDDD">Special documents</th>
</tr>
<tr><td bgcolor="#DDDDDD">
<form action="/adm/coursedocs" method="post" enctype="multipart/form-data">
<input type="file" name="uploaddoc" size="50">
<br />Comment:<br />
<textarea cols=50 rows=4 name='comment'>
</textarea>
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type="hidden" name="cmd" value="upload_supplemental">
<input type="submit" value="Upload Document">
</form>
</td>
<td bgcolor="#DDDDDD">
<form action="/adm/coursedocs" method="post" name="simpleedit">
<input type="hidden" name="folder" value="$folder">
<input type=hidden name="importdetail" value="">
<input type=button onClick=
"javascript:groupsearch()" value="Search">
<input type=button onClick=
"javascript:groupimport();" value="Import">
</form>
</td><td bgcolor="#DDDDDD">
<form action="/adm/coursedocs" method="post" name="supnewfolder">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" value="">
<input name="newfolder" type="button"
onClick="javascript:makenewfolder(this.form,'$folderseq');"
value="New Folder" />
</form>
<form action="/adm/coursedocs" method="post" name="supnewext">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" value="">
<input name="newext" type="button" 
onClick="javascript:makenewext('supnewext');"
value="External Resource" />
</form>
<form action="/adm/coursedocs" method="post" name="supnewsyl">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" 
value="Syllabus=/public/$coursedom/$coursenum/syllabus">
<input name="newsyl" type="submit" value="Syllabus" />
</form>
<form action="/adm/coursedocs" method="post" name="subnewaboutme">
<input type="hidden" name="folder" value="$folder">
<input type="hidden" name="foldername" value="$ENV{'form.foldername'}">
<input type=hidden name="importdetail" 
value="$plainname=/adm/$udom/$uname/aboutme">
<input name="newaboutme" type="submit" value="My Personal Info" />
</form>
</td></tr>
</table></td></tr>
ENDSUPFORM
       }
    }
    if ($allowed) {
	$r->print('<form name="extimport"><input type="hidden" name="title"><input type="hidden" name="url"><input type="hidden" name="useform"></form>');
    }
    $r->print('</table>');
  } else {
# -------------------------------------------------------- This is showdoc mode
      $r->print("<h1>Uploaded Document</h1><p>It is recommended that you use an up-to-date virus scanner before handling this file.</p><p><table>".
         &entryline(0,"Click to download or use your browser's Save Link function",$showdoc).'</table></p>');
  }
  $r->print('</body></html>');
  return OK;
} 

1;
__END__