# The LearningOnline Network with CAPA
# Publication Handler
#
# $Id: lonpublisher.pm,v 1.91 2002/08/09 18:03:05 matthew 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/
#
# 
# (TeX Content Handler
#
# 05/29/00,05/30,10/11 Gerd Kortemeyer)
#
# 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
# 03/23 Guy Albertelli
# 03/24,03/29,04/03 Gerd Kortemeyer
# 04/16/2001 Scott Harrison
# 05/03,05/05,05/07 Gerd Kortemeyer
# 05/28/2001 Scott Harrison
# 06/23,08/07,08/11,8/13,8/17,8/18,8/24,9/26,10/16 Gerd Kortemeyer
# 12/04,12/05 Guy Albertelli
# 12/05 Gerd Kortemeyer
# 12/05 Guy Albertelli
# 12/06,12/07 Gerd Kortemeyer
# 12/15,12/16 Scott Harrison
# 12/25 Gerd Kortemeyer
# YEAR=2002
# 1/16,1/17 Scott Harrison
# 1/17 Gerd Kortemeyer
#
###

###############################################################################
##                                                                           ##
## ORGANIZATION OF THIS PERL MODULE                                          ##
##                                                                           ##
## 1. Modules used by this module                                            ##
## 2. Various subroutines                                                    ##
## 3. Publication Step One                                                   ##
## 4. Phase Two                                                              ##
## 5. Main Handler                                                           ##
##                                                                           ##
###############################################################################


######################################################################
######################################################################

=pod 

=head1 Name

lonpublisher - LON-CAPA publishing handler

=head1 Synopsis

lonpublisher takes the proper steps to add resources to the LON-CAPA
digital library.  This includes updating the metadata table in the
LON-CAPA database.

=head1 Description

lonpublisher is many things to many people.  
To all people it is woefully documented.  
This documentation conforms to this standard.

This module publishes a file.  This involves gathering metadata,
versioning the file, copying file from construction space to
publication space, and copying metadata from construction space
to publication space.

=head2 Internal Functions

=over 4

=cut

######################################################################
######################################################################


package Apache::lonpublisher;

# ------------------------------------------------- modules used by this module
use strict;
use Apache::File;
use File::Copy;
use Apache::Constants qw(:common :http :methods);
use HTML::LCParser;
use Apache::lonxml;
use Apache::lonhomework;
use Apache::loncacc;
use DBI;
use Apache::lonnet();
use Apache::loncommon();
use Apache::lonmysql;

my %addid;
my %nokey;

my %metadatafields;
my %metadatakeys;

my $docroot;

my $cuname;
my $cudom;

#########################################
#########################################

=pod

=item metaeval

Evaluate string with metadata

=cut

#########################################
#########################################
sub metaeval {
    my $metastring=shift;
   
        my $parser=HTML::LCParser->new(\$metastring);
        my $token;
        while ($token=$parser->get_token) {
           if ($token->[0] eq 'S') {
	      my $entry=$token->[1];
              my $unikey=$entry;
              if (defined($token->[2]->{'package'})) { 
                  $unikey.='_package_'.$token->[2]->{'package'};
              } 
              if (defined($token->[2]->{'part'})) { 
                 $unikey.='_'.$token->[2]->{'part'}; 
	      }
              if (defined($token->[2]->{'id'})) { 
                  $unikey.='_'.$token->[2]->{'id'};
              } 
              if (defined($token->[2]->{'name'})) { 
                 $unikey.='_'.$token->[2]->{'name'}; 
	      }
              foreach (@{$token->[3]}) {
		  $metadatafields{$unikey.'.'.$_}=$token->[2]->{$_};
                  if ($metadatakeys{$unikey}) {
		      $metadatakeys{$unikey}.=','.$_;
                  } else {
                      $metadatakeys{$unikey}=$_;
                  }
              }
              if ($metadatafields{$unikey}) {
		  my $newentry=$parser->get_text('/'.$entry);
                  unless (($metadatafields{$unikey}=~/$newentry/) ||
                          ($newentry eq '')) {
                     $metadatafields{$unikey}.=', '.$newentry;
		  }
	      } else {
                 $metadatafields{$unikey}=$parser->get_text('/'.$entry);
              }
          }
       }
}

#########################################
#########################################

=pod

=item metaread

Read a metadata file

=cut

#########################################
#########################################
sub metaread {
    my ($logfile,$fn)=@_;
    unless (-e $fn) {
	print $logfile 'No file '.$fn."\n";
        return '<br><b>No file:</b> <tt>'.$fn.'</tt>';
    }
    print $logfile 'Processing '.$fn."\n";
    my $metastring;
    {
     my $metafh=Apache::File->new($fn);
     $metastring=join('',<$metafh>);
    }
    &metaeval($metastring);
    return '<br><b>Processed file:</b> <tt>'.$fn.'</tt>';
}

#########################################
#########################################

=pod

=item sqltime

Convert 'time' format into a datetime sql format

=cut

#########################################
#########################################
sub sqltime {
    my $timef=shift @_;
    my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
	localtime($timef);
    $mon++; $year+=1900;
    return "$year-$mon-$mday $hour:$min:$sec";
}


#########################################
#########################################

=pod

=item Form field generating functions

=over 4

=item textfield

=item hiddenfield

=item selectbox

=back

=cut

#########################################
#########################################
sub textfield {
    my ($title,$name,$value)=@_;
    return "\n<p><b>$title:</b><br>".
           '<input type=text name="'.$name.'" size=80 value="'.$value.'">';
}

sub hiddenfield {
    my ($name,$value)=@_;
    return "\n".'<input type=hidden name="'.$name.'" value="'.$value.'">';
}

sub selectbox {
    my ($title,$name,$value,$functionref,@idlist)=@_;
    my $uctitle=uc($title);
    my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
	"</b></font><br />".'<select name="'.$name.'">';
    foreach (@idlist) {
        $selout.='<option value=\''.$_.'\'';
        if ($_ eq $value) {
	    $selout.=' selected>'.&{$functionref}($_).'</option>';
	}
        else {$selout.='>'.&{$functionref}($_).'</option>';}
    }
    return $selout.'</select>';
}

#########################################
#########################################

=pod

=item urlfixup

Fix up a url?  First step of publication

=cut

#########################################
#########################################
sub urlfixup {
    my ($url,$target)=@_;
    unless ($url) { return ''; }
    #javascript code needs no fixing
    if ($url =~ /^javascript:/i) { return $url; }
    if ($url =~ /^mailto:/i) { return $url; }
    #internal document links need no fixing
    if ($url =~ /^\#/) { return $url; } 
    my ($host)=($url=~/(?:http\:\/\/)*([^\/]+)/);
    foreach (values %Apache::lonnet::hostname) {
	if ($_ eq $host) {
	    $url=~s/^http\:\/\///;
            $url=~s/^$host//;
        }
    }
    if ($url=~/^http\:\/\//) { return $url; }
    $url=~s/\~$cuname/res\/$cudom\/$cuname/;
    return $url;
}

#########################################
#########################################

=pod

=item absoluteurl

Currently undocumented    

=cut

#########################################
#########################################
sub absoluteurl {
    my ($url,$target)=@_;
    unless ($url) { return ''; }
    if ($target) {
	$target=~s/\/[^\/]+$//;
       $url=&Apache::lonnet::hreflocation($target,$url);
    }
    return $url;
}

#########################################
#########################################

=pod

=item set_allow

Currently undocumented    

=cut

#########################################
#########################################
sub set_allow {
    my ($allow,$logfile,$target,$tag,$oldurl)=@_;
    my $newurl=&urlfixup($oldurl,$target);
    my $return_url=$oldurl;
    print $logfile 'GUYURL: '.$tag.':'.$oldurl.' - '.$newurl."\n";
    if ($newurl ne $oldurl) {
	$return_url=$newurl;
	print $logfile 'URL: '.$tag.':'.$oldurl.' - '.$newurl."\n";
    }
    if (($newurl !~ /^javascript:/i) &&
	($newurl !~ /^mailto:/i) &&
	($newurl !~ /^http:/i) &&
	($newurl !~ /^\#/)) {
	$$allow{&absoluteurl($newurl,$target)}=1;
    }
    return $return_url
}

#########################################
#########################################

=pod

=item get_subscribed_hosts

Currently undocumented    

=cut

#########################################
#########################################
sub get_subscribed_hosts {
    my ($target)=@_;
    my @subscribed;
    my $filename;
    $target=~/(.*)\/([^\/]+)$/;
    my $srcf=$2;
    opendir(DIR,$1);
    while ($filename=readdir(DIR)) {
	if ($filename=~/$srcf\.(\w+)$/) {
	    my $subhost=$1;
	    if ($subhost ne 'meta' && $subhost ne 'subscription') {
		push(@subscribed,$subhost);
	    }
	}
    }
    closedir(DIR);
    my $sh;
    if ( $sh=Apache::File->new("$target.subscription") ) {
	&Apache::lonnet::logthis("opened $target.subscription");
	while (my $subline=<$sh>) {
	    &Apache::lonnet::logthis("Trying $subline");
	    if ($subline =~ /(^\w+):/) { push(@subscribed,$1); } else {
		&Apache::lonnet::logthis("No Match for $subline");
	    }
	}
    } else {
	&Apache::lonnet::logthis("Un able to open $target.subscription");
    }
    &Apache::lonnet::logthis("Got list of ".join(':',@subscribed));
    return @subscribed;
}


#########################################
#########################################

=pod

=item get_max_ids_indices

Currently undocumented    

=cut

#########################################
#########################################
sub get_max_ids_indices {
    my ($content)=@_;
    my $maxindex=10;
    my $maxid=10;
    my $needsfixup=0;

    my $parser=HTML::LCParser->new($content);
    my $token;
    while ($token=$parser->get_token) {
	if ($token->[0] eq 'S') {
	    my $counter;
	    if ($counter=$addid{$token->[1]}) {
		if ($counter eq 'id') {
		    if (defined($token->[2]->{'id'})) {
			$maxid=($token->[2]->{'id'}>$maxid)?$token->[2]->{'id'}:$maxid;
		    } else {
			$needsfixup=1;
		    }
		} else {
		    if (defined($token->[2]->{'index'})) {
			$maxindex=($token->[2]->{'index'}>$maxindex)?$token->[2]->{'index'}:$maxindex;
		    } else {
			$needsfixup=1;
		    }
		}
	    }
	}
    }
    return ($needsfixup,$maxid,$maxindex);
}

#########################################
#########################################

=pod

=item get_all_text_unbalanced

Currently undocumented    

=cut

#########################################
#########################################
sub get_all_text_unbalanced {
    #there is a copy of this in lonxml.pm
    my($tag,$pars)= @_;
    my $token;
    my $result='';
    $tag='<'.$tag.'>';
    while ($token = $$pars[-1]->get_token) {
	if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
	    $result.=$token->[1];
	} elsif ($token->[0] eq 'PI') {
	    $result.=$token->[2];
	} elsif ($token->[0] eq 'S') {
	    $result.=$token->[4];
	} elsif ($token->[0] eq 'E')  {
	    $result.=$token->[2];
	}
	if ($result =~ /(.*)$tag(.*)/) {
	    #&Apache::lonnet::logthis('Got a winner with leftovers ::'.$2);
	    #&Apache::lonnet::logthis('Result is :'.$1);
	    $result=$1;
	    my $redo=$tag.$2;
	    push (@$pars,HTML::LCParser->new(\$redo));
	    $$pars[-1]->xml_mode('1');
	    last;
	}
    }
    return $result
}

#########################################
#########################################

=pod

=item fix_ids_and_indices

Currently undocumented    

=cut

#########################################
#########################################
#Arguably this should all be done as a lonnet::ssi instead
sub fix_ids_and_indices {
    my ($logfile,$source,$target)=@_;

    my %allow;
    my $content;
    {
	my $org=Apache::File->new($source);
	$content=join('',<$org>);
    }

    my ($needsfixup,$maxid,$maxindex)=&get_max_ids_indices(\$content);

    if ($needsfixup) {
	print $logfile "Needs ID and/or index fixup\n".
	    "Max ID   : $maxid (min 10)\n".
                "Max Index: $maxindex (min 10)\n";
    }
    my $outstring='';
    my @parser;
    $parser[0]=HTML::LCParser->new(\$content);
    $parser[-1]->xml_mode(1);
    my $token;
    while (@parser) {
	while ($token=$parser[-1]->get_token) {
	    if ($token->[0] eq 'S') {
		my $counter;
		my $tag=$token->[1];
		my $lctag=lc($tag);
		if ($lctag eq 'allow') {
		    $allow{$token->[2]->{'src'}}=1;
		    next;
		}
		my %parms=%{$token->[2]};
		$counter=$addid{$tag};
		if (!$counter) { $counter=$addid{$lctag}; }
		if ($counter) {
		    if ($counter eq 'id') {
			unless (defined($parms{'id'})) {
			    $maxid++;
			    $parms{'id'}=$maxid;
			    print $logfile 'ID: '.$tag.':'.$maxid."\n";
			}
		    } elsif ($counter eq 'index') {
			unless (defined($parms{'index'})) {
			    $maxindex++;
			    $parms{'index'}=$maxindex;
			    print $logfile 'Index: '.$tag.':'.$maxindex."\n";
			}
		    }
		}
		foreach my $type ('src','href','background','bgimg') {
		    foreach my $key (keys(%parms)) {
			if ($key =~ /^$type$/i) {
			    $parms{$key}=&set_allow(\%allow,$logfile,
						    $target,$tag,
						    $parms{$key});
			}
		    }
		}
		# probably a <randomlabel> image type <label>
		if ($lctag eq 'label' && defined($parms{'description'})) {
		    my $next_token=$parser[-1]->get_token();
		    if ($next_token->[0] eq 'T') {
			$next_token->[1]=&set_allow(\%allow,$logfile,
						    $target,$tag,
						    $next_token->[1]);
		    }
		    $parser[-1]->unget_token($next_token);
		}
		if ($lctag eq 'applet') {
		    my $codebase='';
		    if (defined($parms{'codebase'})) {
			my $oldcodebase=$parms{'codebase'};
			unless ($oldcodebase=~/\/$/) {
			    $oldcodebase.='/';
			}
			$codebase=&urlfixup($oldcodebase,$target);
			$codebase=~s/\/$//;    
			if ($codebase ne $oldcodebase) {
			    $parms{'codebase'}=$codebase;
			    print $logfile 'URL codebase: '.$tag.':'.
				$oldcodebase.' - '.
				    $codebase."\n";
			}
			$allow{&absoluteurl($codebase,$target).'/*'}=1;
		    } else {
			foreach ('archive','code','object') {
			    if (defined($parms{$_})) {
				my $oldurl=$parms{$_};
				my $newurl=&urlfixup($oldurl,$target);
				$newurl=~s/\/[^\/]+$/\/\*/;
				print $logfile 'Allow: applet '.$_.':'.
				    $oldurl.' allows '.
					$newurl."\n";
				$allow{&absoluteurl($newurl,$target)}=1;
			    }
			}
		    }
		}
		my $newparmstring='';
		my $endtag='';
		foreach (keys %parms) {
		    if ($_ eq '/') {
			$endtag=' /';
		    } else { 
			my $quote=($parms{$_}=~/\"/?"'":'"');
			$newparmstring.=' '.$_.'='.$quote.$parms{$_}.$quote;
		    }
		}
		if (!$endtag) { if ($token->[4]=~m:/>$:) { $endtag=' /'; }; }
		$outstring.='<'.$tag.$newparmstring.$endtag.'>';
		if ($lctag eq 'm') {
		    $outstring.=&get_all_text_unbalanced('/m',\@parser);
		}
	    } elsif ($token->[0] eq 'E') {
		if ($token->[2]) {
		    unless ($token->[1] eq 'allow') {
			$outstring.='</'.$token->[1].'>';
		    }
		}
	    } else {
		$outstring.=$token->[1];
	    }
	}
	pop(@parser);
    }

    if ($needsfixup) {
	print $logfile "End of ID and/or index fixup\n".
	    "Max ID   : $maxid (min 10)\n".
		"Max Index: $maxindex (min 10)\n";
    } else {
	print $logfile "Does not need ID and/or index fixup\n";
    }

    return ($outstring,%allow);
}

#########################################
#########################################

=pod

=item store_metadata

Store the metadata in the metadata table in the loncapa database.
Uses lonmysql to access the database.

Inputs: \%metadata

Returns: (error,status).  error is undef on success, status is undef on error.

=cut

#########################################
#########################################
sub store_metadata {
    my %metadata = %{shift()};
    my $error;
    # Determine if the table exists
    my $status = &Apache::lonmysql::check_table('metadata');
    if (! defined($status)) {
        $error='<font color="red">WARNING: Cannot connect to '.
            'database!</font>';
        &Apache::lonnet::logthis($error);
        return ($error,undef);
    }
    if ($status == 0) {
        # It would be nice to actually create the table....
        $error ='<font color="red">WARNING: The metadata table does not '.
            'exist in the LON-CAPA database.</font>';
        &Apache::lonnet::logthis($error);
        return ($error,undef);
    }
    # Remove old value from table
    $status = &Apache::lonmysql::remove_from_table
        ('metadata','url',$metadata{'url'});
    if (! defined($status)) {
        $error = '<font color="red">Error when removing old values from '.
            'metadata table in LON-CAPA database.</font>';
        &Apache::lonnet::logthis($error);
        return ($error,undef);
    }
    # Store data in table.
    $status = &Apache::lonmysql::store_row('metadata',\%metadata);
    if (! defined($status)) {
        $error='<font color="red">Error occured storing new values in '.
            'metadata table in LON-CAPA database</font>';
        &Apache::lonnet::logthis($error);
        return ($error,undef);
    }
    return (undef,$status);
}

#########################################
#########################################

=pod

=item publish

Currently undocumented.  This is the workhorse function of this module.

=cut

#########################################
#########################################
sub publish {

    my ($source,$target,$style)=@_;
    my $logfile;
    my $scrout='';
    my $allmeta='';
    my $content='';
    my %allow=();

    unless ($logfile=Apache::File->new('>>'.$source.'.log')) {
	return 
         '<font color=red>No write permission to user directory, FAIL</font>';
    }
    print $logfile 
"\n\n================= Publish ".localtime()." Phase One  ================\n";

    if (($style eq 'ssi') || ($style eq 'rat')) {
# ------------------------------------------------------- This needs processing

# ----------------------------------------------------------------- Backup Copy
	my $copyfile=$source.'.save';
        if (copy($source,$copyfile)) {
	    print $logfile "Copied original file to ".$copyfile."\n";
        } else {
	    print $logfile "Unable to write backup ".$copyfile.':'.$!."\n";
          return "<font color=red>Failed to write backup copy, $!,FAIL</font>";
        }
# ------------------------------------------------------------- IDs and indices
	
	my $outstring;
	($outstring,%allow)=&fix_ids_and_indices($logfile,$source,$target);
# ------------------------------------------------------------ Construct Allows
    
	$scrout.='<h3>Dependencies</h3>';
        my $allowstr='';
        foreach (sort(keys(%allow))) {
	   my $thisdep=$_;
	   if ($thisdep !~ /[^\s]/) { next; }
           unless ($style eq 'rat') { 
              $allowstr.="\n".'<allow src="'.$thisdep.'" />';
	   }
           $scrout.='<br>';
           unless ($thisdep=~/\*/) {
	       $scrout.='<a href="'.$thisdep.'">';
           }
           $scrout.='<tt>'.$thisdep.'</tt>';
           unless ($thisdep=~/\*/) {
	       $scrout.='</a>';
               if (
       &Apache::lonnet::getfile($Apache::lonnet::perlvar{'lonDocRoot'}.'/'.
                                            $thisdep.'.meta') eq '-1') {
		   $scrout.=
                           ' - <font color=red>Currently not available</font>';
               } else {
                   my %temphash=(&Apache::lonnet::declutter($target).'___'.
                             &Apache::lonnet::declutter($thisdep).'___usage'
                                 => time);
                   $thisdep=~/^\/res\/(\w+)\/(\w+)\//;
                   if ((defined($1)) && (defined($2))) {
                      &Apache::lonnet::put('resevaldata',\%temphash,$1,$2);
		   }
	       }
           }
        }
        $outstring=~s/\n*(\<\/[^\>]+\>)\s*$/$allowstr\n$1\n/s;

	#Encode any High ASCII characters
	$outstring=&HTML::Entities::encode($outstring,"\200-\377");
# ------------------------------------------------------------- Write modified

        {
          my $org;
          unless ($org=Apache::File->new('>'.$source)) {
             print $logfile "No write permit to $source\n";
             return 
              "<font color=red>No write permission to $source, FAIL</font>";
	  }
          print $org $outstring;
        }
	  $content=$outstring;

    }
# --------------------------------------------- Initial step done, now metadata

# ---------------------------------------- Storage for metadata keys and fields

     %metadatafields=();
     %metadatakeys=();
     
     my %oldparmstores=();
     
     
     $scrout.='<h3>Metadata Information ' .
       Apache::loncommon::help_open_topic("Metadata_Description")
       . '</h3>';

# ------------------------------------------------ First, check out environment
     unless (-e $source.'.meta') {
        $metadatafields{'author'}=$ENV{'environment.firstname'}.' '.
	                          $ENV{'environment.middlename'}.' '.
		                  $ENV{'environment.lastname'}.' '.
		                  $ENV{'environment.generation'};
        $metadatafields{'author'}=~s/\s+/ /g;
        $metadatafields{'author'}=~s/\s+$//;
        $metadatafields{'owner'}=$cuname.'@'.$cudom;

# ------------------------------------------------ Check out directory hierachy

        my $thisdisfn=$source;
        $thisdisfn=~s/^\/home\/$cuname\///;

        my @urlparts=split(/\//,$thisdisfn);
        $#urlparts--;

        my $currentpath='/home/'.$cuname.'/';

        foreach (@urlparts) {
	    $currentpath.=$_.'/';
            $scrout.=&metaread($logfile,$currentpath.'default.meta');
        }

# ------------------- Clear out parameters and stores (there should not be any)

        foreach (keys %metadatafields) {
	    if (($_=~/^parameter/) || ($_=~/^stores/)) {
		delete $metadatafields{$_};
            }
        }

    } else {
# ---------------------- Read previous metafile, remember parameters and stores

        $scrout.=&metaread($logfile,$source.'.meta');

        foreach (keys %metadatafields) {
	    if (($_=~/^parameter/) || ($_=~/^stores/)) {
                $oldparmstores{$_}=1;
		delete $metadatafields{$_};
            }
        }
        
    }

# -------------------------------------------------- Parse content for metadata
    if ($style eq 'ssi') {
        my $oldenv=$ENV{'request.uri'};

        $ENV{'request.uri'}=$target;
        $allmeta=Apache::lonxml::xmlparse(undef,'meta',$content);
        $ENV{'request.uri'}=$oldenv;

        &metaeval($allmeta);
    }
# ---------------- Find and document discrepancies in the parameters and stores

        my $chparms='';
        foreach (sort keys %metadatafields) {
	    if (($_=~/^parameter/) || ($_=~/^stores/)) {
                unless ($_=~/\.\w+$/) { 
                   unless ($oldparmstores{$_}) {
		      print $logfile 'New: '.$_."\n";
                      $chparms.=$_.' ';
                   }
	        }
            }
        }
        if ($chparms) {
	    $scrout.='<p><b>New parameters or stored values:</b> '.
                     $chparms;
        }

        $chparms='';
        foreach (sort keys %oldparmstores) {
	    if (($_=~/^parameter/) || ($_=~/^stores/)) {
                unless (($metadatafields{$_.'.name'}) ||
                        ($metadatafields{$_.'.package'}) || ($_=~/\.\w+$/)) {
		    print $logfile 'Obsolete: '.$_."\n";
                    $chparms.=$_.' ';
                }
            }
        }
        if ($chparms) {
	    $scrout.='<p><b>Obsolete parameters or stored values:</b> '.
                     $chparms;
        }

# ------------------------------------------------------- Now have all metadata

        $scrout.=
     '<form name="pubform" action="/adm/publish" method="post">'.
       '<p><input type="submit" value="Finalize Publication" /></p>'.
          &hiddenfield('phase','two').
          &hiddenfield('filename',$ENV{'form.filename'}).
	  &hiddenfield('allmeta',&Apache::lonnet::escape($allmeta)).
          &hiddenfield('dependencies',join(',',keys %allow)).
          &textfield('Title','title',$metadatafields{'title'}).
          &textfield('Author(s)','author',$metadatafields{'author'}).
	  &textfield('Subject','subject',$metadatafields{'subject'});

# --------------------------------------------------- Scan content for keywords

        my $keywords_help = Apache::loncommon::help_open_topic("Publishing_Keywords");
	my $keywordout=<<"END";
<script>
function checkAll(field)
{
    for (i = 0; i < field.length; i++)
        field[i].checked = true ;
}

function uncheckAll(field)
{
    for (i = 0; i < field.length; i++)
        field[i].checked = false ;
}
</script>
<p><b>Keywords: $keywords_help</b> 
<input type="button" value="check all" onclick="javascript:checkAll(document.pubform.keywords)"> 
<input type="button" value="uncheck all" onclick="javascript:uncheckAll(document.pubform.keywords)"> 
<br />
END
        $keywordout.='<table border=2><tr>';
        my $colcount=0;
        my %keywords=();
        
	if (length($content)<500000) {
	    my $textonly=$content;
            $textonly=~s/\<script[^\<]+\<\/script\>//g;
            $textonly=~s/\<m\>[^\<]+\<\/m\>//g;
            $textonly=~s/\<[^\>]*\>//g;
            $textonly=~tr/A-Z/a-z/;
            $textonly=~s/[\$\&][a-z]\w*//g;
            $textonly=~s/[^a-z\s]//g;

            foreach ($textonly=~m/(\w+)/g) {
		unless ($nokey{$_}) {
                   $keywords{$_}=1;
                } 
            }
        }

            
            foreach (split(/\W+/,$metadatafields{'keywords'})) {
		$keywords{$_}=1;
            }

            foreach (sort keys %keywords) {
                $keywordout.='<td><input type=checkbox name="keywords" value="'.$_.'"';
                if ($metadatafields{'keywords'}) {
                   if ($metadatafields{'keywords'}=~/$_/) { 
                      $keywordout.=' checked'; 
                   }
	        } elsif (&Apache::loncommon::keyword($_)) {
	            $keywordout.=' checked';
                } 
                $keywordout.='>'.$_.'</td>';
                if ($colcount>10) {
		    $keywordout.="</tr><tr>\n";
                    $colcount=0;
                }
                $colcount++;
            }
        
	$keywordout.='</tr></table>';

        $scrout.=$keywordout;

        $scrout.=&textfield('Additional Keywords','addkey','');

        $scrout.=&textfield('Notes','notes',$metadatafields{'notes'});

        $scrout.=
             '<p><b>Abstract:</b><br><textarea cols=80 rows=5 name=abstract>'.
              $metadatafields{'abstract'}.'</textarea>';

	$source=~/\.(\w+)$/;

	$scrout.=&hiddenfield('mime',$1);

        $scrout.=&selectbox('Language','language',
                            $metadatafields{'language'},
			    \&Apache::loncommon::languagedescription,
			    (&Apache::loncommon::languageids),
			     );

        unless ($metadatafields{'creationdate'}) {
	    $metadatafields{'creationdate'}=time;
        }
        $scrout.=&hiddenfield('creationdate',$metadatafields{'creationdate'});

        $scrout.=&hiddenfield('lastrevisiondate',time);

			   
	$scrout.=&textfield('Publisher/Owner','owner',
                            $metadatafields{'owner'});
# --------------------------------------------------- Correct copyright for rat        

    if ($style eq 'rat') {
	if ($metadatafields{'copyright'} eq 'public') { 
	    delete $metadatafields{'copyright'};
	}
        $scrout.=&selectbox('Copyright/Distribution','copyright',
                            $metadatafields{'copyright'},
			    \&Apache::loncommon::copyrightdescription,
		     (grep !/^public$/,(&Apache::loncommon::copyrightids)));
    }
    else {
        $scrout.=&selectbox('Copyright/Distribution','copyright',
                            $metadatafields{'copyright'},
			    \&Apache::loncommon::copyrightdescription,
			     (&Apache::loncommon::copyrightids));
    }

    my $copyright_help = Apache::loncommon::help_open_topic("Publishing_Copyright");
    $scrout =~ s/DISTRIBUTION:/'DISTRIBUTION: ' . $copyright_help/ge;
    return $scrout.
      '<p><input type="submit" value="Finalize Publication" /></p></form>';
}

#########################################
#########################################

=pod 

=item phasetwo

Render second interface showing status of publication steps.
This is publication step two.

=cut

#########################################
#########################################
sub phasetwo {

    my ($source,$target,$style,$distarget)=@_;
    my $logfile;
    my $scrout='';
    unless ($logfile=Apache::File->new('>>'.$source.'.log')) {
	return 
         '<font color=red>No write permission to user directory, FAIL</font>';
    }
    print $logfile 
"\n================= Publish ".localtime()." Phase Two  ================\n";

     %metadatafields=();
     %metadatakeys=();

     &metaeval(&Apache::lonnet::unescape($ENV{'form.allmeta'}));

     $metadatafields{'title'}=$ENV{'form.title'};
     $metadatafields{'author'}=$ENV{'form.author'};
     $metadatafields{'subject'}=$ENV{'form.subject'};
     $metadatafields{'notes'}=$ENV{'form.notes'};
     $metadatafields{'abstract'}=$ENV{'form.abstract'};
     $metadatafields{'mime'}=$ENV{'form.mime'};
     $metadatafields{'language'}=$ENV{'form.language'};
     $metadatafields{'creationdate'}=$ENV{'form.creationdate'};
     $metadatafields{'lastrevisiondate'}=$ENV{'form.lastrevisiondate'};
     $metadatafields{'owner'}=$ENV{'form.owner'};
     $metadatafields{'copyright'}=$ENV{'form.copyright'};
     $metadatafields{'dependencies'}=$ENV{'form.dependencies'};

     my $allkeywords=$ENV{'form.addkey'};
     if (exists($ENV{'form.keywords'}) && (ref($ENV{'form.keywords'}))) {
         my @Keywords = @{$ENV{'form.keywords'}};
         foreach (@Keywords) {
             $allkeywords.=','.$_;
         }
     }
     $allkeywords=~s/\W+/\,/;
     $allkeywords=~s/^\,//;
     $metadatafields{'keywords'}=$allkeywords;
 
     {
       print $logfile "\nWrite metadata file for ".$source;
       my $mfh;
       unless ($mfh=Apache::File->new('>'.$source.'.meta')) {
	return 
         '<font color=red>Could not write metadata, FAIL</font>';
       }
       foreach (sort keys %metadatafields) {
	 unless ($_=~/\./) {
           my $unikey=$_;
           $unikey=~/^([A-Za-z]+)/;
           my $tag=$1;
           $tag=~tr/A-Z/a-z/;
           print $mfh "\n\<$tag";
           foreach (split(/\,/,$metadatakeys{$unikey})) {
               my $value=$metadatafields{$unikey.'.'.$_};
               $value=~s/\"/\'\'/g;
               print $mfh ' '.$_.'="'.$value.'"';
           }
	   print $mfh '>'.
	     &HTML::Entities::encode($metadatafields{$unikey})
	       .'</'.$tag.'>';
         }
       }
       $scrout.='<p>Wrote Metadata';
       print $logfile "\nWrote metadata";
     }

# -------------------------------- Synchronize entry with SQL metadata database
    my $warning;
    $metadatafields{'url'} = $distarget;
    $metadatafields{'version'} = 'current';
    unless ($metadatafields{'copyright'} eq 'priv') {
        my ($error,$success) = &store_metadata(\%metadatafields);
        if ($success) {
            $scrout.='<p>Synchronized SQL metadata database';
            print $logfile "\nSynchronized SQL metadata database";
        } else {
            $warning.=$error;
            print $logfile "\n".$error;
        }
    } else {
        $scrout.='<p>Private Publication - did not synchronize database';
        print $logfile "\nPrivate: Did not synchronize data into ".
            "SQL metadata database";
    }
# ----------------------------------------------------------- Copy old versions
   
if (-e $target) {
    my $filename;
    my $maxversion=0;
    $target=~/(.*)\/([^\/]+)\.(\w+)$/;
    my $srcf=$2;
    my $srct=$3;
    my $srcd=$1;
    unless ($srcd=~/^\/home\/httpd\/html\/res/) {
	print $logfile "\nPANIC: Target dir is ".$srcd;
        return "<font color=red>Invalid target directory, FAIL</font>";
    }
    opendir(DIR,$srcd);
    while ($filename=readdir(DIR)) {
       if ($filename=~/$srcf\.(\d+)\.$srct$/) {
	   $maxversion=($1>$maxversion)?$1:$maxversion;
       }
    }
    closedir(DIR);
    $maxversion++;
    $scrout.='<p>Creating old version '.$maxversion;
    print $logfile "\nCreating old version ".$maxversion;

    my $copyfile=$srcd.'/'.$srcf.'.'.$maxversion.'.'.$srct;

        if (copy($target,$copyfile)) {
	    print $logfile "Copied old target to ".$copyfile."\n";
            $scrout.='<p>Copied old target file';
        } else {
	    print $logfile "Unable to write ".$copyfile.':'.$!."\n";
           return "<font color=red>Failed to copy old target, $!, FAIL</font>";
        }

# --------------------------------------------------------------- Copy Metadata

	$copyfile=$copyfile.'.meta';

        if (copy($target.'.meta',$copyfile)) {
	    print $logfile "Copied old target metadata to ".$copyfile."\n";
            $scrout.='<p>Copied old metadata';
        } else {
	    print $logfile "Unable to write metadata ".$copyfile.':'.$!."\n";
            if (-e $target.'.meta') {
               return 
       "<font color=red>Failed to write old metadata copy, $!, FAIL</font>";
	    }
        }


} else {
    $scrout.='<p>Initial version';
    print $logfile "\nInitial version";
}

# ---------------------------------------------------------------- Write Source
	my $copyfile=$target;

           my @parts=split(/\//,$copyfile);
           my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";

           my $count;
           for ($count=5;$count<$#parts;$count++) {
               $path.="/$parts[$count]";
               if ((-e $path)!=1) {
                   print $logfile "\nCreating directory ".$path;
                   $scrout.='<p>Created directory '.$parts[$count];
		   mkdir($path,0777);
               }
           }

        if (copy($source,$copyfile)) {
	    print $logfile "Copied original source to ".$copyfile."\n";
            $scrout.='<p>Copied source file';
        } else {
	    print $logfile "Unable to write ".$copyfile.':'.$!."\n";
            return "<font color=red>Failed to copy source, $!, FAIL</font>";
        }

# --------------------------------------------------------------- Copy Metadata

        $copyfile=$copyfile.'.meta';

        if (copy($source.'.meta',$copyfile)) {
	    print $logfile "Copied original metadata to ".$copyfile."\n";
            $scrout.='<p>Copied metadata';
        } else {
	    print $logfile "Unable to write metadata ".$copyfile.':'.$!."\n";
            return 
          "<font color=red>Failed to write metadata copy, $!, FAIL</font>";
        }

# --------------------------------------------------- Send update notifications

    my @subscribed=&get_subscribed_hosts($target);
    foreach my $subhost (@subscribed) {
	$scrout.='<p>Notifying host '.$subhost.':';
	print $logfile "\nNotifying host ".$subhost.':';
	my $reply=&Apache::lonnet::critical('update:'.$target,$subhost);
	$scrout.=$reply;
	print $logfile $reply;
    }

# ---------------------------------------- Send update notifications, meta only

    my @subscribedmeta=&get_subscribed_hosts("$target.meta");
    foreach my $subhost (@subscribedmeta) {
	$scrout.='<p>Notifying host for metadata only '.$subhost.':';
	print $logfile "\nNotifying host for metadata only ".$subhost.':';
	my $reply=&Apache::lonnet::critical('update:'.$target.'.meta',
					    $subhost);
	$scrout.=$reply;
	print $logfile $reply;
    }

# ------------------------------------------------ Provide link to new resource

    my $thisdistarget=$target;
    $thisdistarget=~s/^$docroot//;

    my $thissrc=$source;
    $thissrc=~s/^\/home\/(\w+)\/public_html/\/priv\/$1/;

    my $thissrcdir=$thissrc;
    $thissrcdir=~s/\/[^\/]+$/\//;


    return $warning.$scrout.
      '<hr><a href="'.$thisdistarget.'"><font size=+2>View Published Version</font></a>'.
      '<p><a href="'.$thissrc.'"><font size=+2>Back to Source</font></a>'.
      '<p><a href="'.$thissrcdir.
      '"><font size=+2>Back to Source Directory</font></a>';

}


#########################################
#########################################

=pod

=item handler

A basic outline of the handler subroutine follows.

=over 4

=item Get query string for limited number of parameters

=item Check filename

=item File is there and owned, init lookup tables

=item Start page output

=item Individual file

=item publish from $thisfn to $thistarget with $thisembstyle

=back

=cut

#########################################
#########################################
sub handler {
  my $r=shift;

  if ($r->header_only) {
     $r->content_type('text/html');
     $r->send_http_header;
     return OK;
  }

# Get query string for limited number of parameters

    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                            ['filename']);

# -------------------------------------------------------------- Check filename

  my $fn=$ENV{'form.filename'};

  
  unless ($fn) { 
     $r->log_reason($cuname.' at '.$cudom.
         ' trying to publish empty filename', $r->filename); 
     return HTTP_NOT_FOUND;
  } 

  ($cuname,$cudom)=
    &Apache::loncacc::constructaccess($fn,$r->dir_config('lonDefDomain'));
  unless (($cuname) && ($cudom)) {
     $r->log_reason($cuname.' at '.$cudom.
         ' trying to publish file '.$ENV{'form.filename'}.
         ' ('.$fn.') - not authorized', 
         $r->filename); 
     return HTTP_NOT_ACCEPTABLE;
  }

  unless (&Apache::lonnet::homeserver($cuname,$cudom) 
          eq $r->dir_config('lonHostID')) {
     $r->log_reason($cuname.' at '.$cudom.
         ' trying to publish file '.$ENV{'form.filename'}.
         ' ('.$fn.') - not homeserver ('.
         &Apache::lonnet::homeserver($cuname,$cudom).')', 
         $r->filename); 
     return HTTP_NOT_ACCEPTABLE;
  }

  $fn=~s/^http\:\/\/[^\/]+//;
  $fn=~s/^\/\~(\w+)/\/home\/$1\/public_html/;

  my $targetdir='';
  $docroot=$r->dir_config('lonDocRoot'); 
  if ($1 ne $cuname) {
     $r->log_reason($cuname.' at '.$cudom.
         ' trying to publish unowned file '.$ENV{'form.filename'}.
         ' ('.$fn.')', 
         $r->filename); 
     return HTTP_NOT_ACCEPTABLE;
  } else {
      $targetdir=$docroot.'/res/'.$cudom;
  }
                                 
  
  unless (-e $fn) { 
     $r->log_reason($cuname.' at '.$cudom.
         ' trying to publish non-existing file '.$ENV{'form.filename'}.
         ' ('.$fn.')', 
         $r->filename); 
     return HTTP_NOT_FOUND;
  } 

unless ($ENV{'form.phase'} eq 'two') {

# --------------------------------- File is there and owned, init lookup tables

  %addid=();

  {
      my $fh=Apache::File->new($r->dir_config('lonTabDir').'/addid.tab');
      while (<$fh>=~/(\w+)\s+(\w+)/) {
          $addid{$1}=$2;
      }
  }

  %nokey=();

  {
     my $fh=Apache::File->new($r->dir_config('lonIncludes').'/un_keyword.tab');
      while (<$fh>) {
          my $word=$_;
          chomp($word);
          $nokey{$word}=1;
      }
  }

}

# ----------------------------------------------------------- Start page output

  $r->content_type('text/html');
  $r->send_http_header;

  $r->print('<html><head><title>LON-CAPA Publishing</title></head>');
  $r->print(
   '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
  my $thisfn=$fn;
   
# ------------------------------------------------------------- Individual file
  {
      $thisfn=~/\.(\w+)$/;
      my $thistype=$1;
      my $thisembstyle=&Apache::loncommon::fileembstyle($thistype);

      my $thistarget=$thisfn;
      
      $thistarget=~s/^\/home/$targetdir/;
      $thistarget=~s/\/public\_html//;

      my $thisdistarget=$thistarget;
      $thisdistarget=~s/^$docroot//;

      my $thisdisfn=$thisfn;
      $thisdisfn=~s/^\/home\/$cuname\/public_html\///;

      $r->print('<h2>Publishing '.
        &Apache::loncommon::filedescription($thistype).' <tt>'.
        $thisdisfn.'</tt></h2><b>Target:</b> <tt>'.$thisdistarget.'</tt><p>');
   
       if (($cuname ne $ENV{'user.name'}) || ($cudom ne $ENV{'user.domain'})) {
          $r->print('<h3><font color=red>Co-Author: '.$cuname.' at '.$cudom.
               '</font></h3>');
      }

      if (&Apache::loncommon::fileembstyle($thistype) eq 'ssi') {
          $r->print('<br><a href="/adm/diff?filename=/~'.$cuname.'/'.
                    $thisdisfn.
  	  '&versionone=priv" target=cat>Diffs with Current Version</a><p>');
      }
  
# ------------ We are publishing from $thisfn to $thistarget with $thisembstyle

       unless ($ENV{'form.phase'} eq 'two') {
         $r->print(
          '<hr>'.&publish($thisfn,$thistarget,$thisembstyle));
       } else {
         $r->print(
          '<hr>'.&phasetwo($thisfn,$thistarget,$thisembstyle,$thisdistarget)); 
       }  

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

  return OK;
}

1;
__END__

=pod

=back

=cut

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at 
 root@localhost to inform them of the time this error occurred,
 and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
</body></html>