#!/usr/bin/perl -w
#
# TWiki WikiClone (see $wikiversion in wiki.pm for version)
#
# Based on parts of Ward Cunninghams original Wiki and JosWiki.
# Copyright (C) 1998 Markus Peter - SPiN GmbH (warpi@spin.de)
# Some changes by Dave Harris (drh@bhresearch.co.uk) incorporated
# Copyright (C) 1999 Peter Thoeny, peter.thoeny@takefive.com , 
# TakeFive Software Inc.
#
# This program 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.
#
# This program 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, published at 
# http://www.gnu.ai.mit.edu/copyleft/gpl.html 

use CGI;
use wiki;

$query= new CGI;

print "Content-type: text/html\n\n";

&main();

sub main
{
    my $thePathInfo = $query->path_info(); 
    my $theRemoteUser = $query->remote_user();
    my $theTopic = $query->param('topic');
    my $theUrl = $query->url;

    ( $topic, $webName) = 
	&wiki::initialize( $thePathInfo, $theRemoteUser, $theTopic, $theUrl );

    my $tmpl= "", $text="";
    my $rev= $query->param("rev");
    $rev =~ s/1\.//go;  # cut major
    my $maxrev = 1;

    if( ! &wiki::webExists( $webName ) )
    {
	$tmpl= &wiki::readTemplate( "noweb" );
	$tmpl = &wiki::handleCommonTags( $tmpl, $topic );
	print $tmpl;
	return;
    }
    $tmpl= &wiki::readTemplate( "view" );
    my $topicExists = &wiki::topicExists( $webName, $topic );
    if( $topicExists )
    {
	$maxrev = &wiki::getRevisionNumber( $topic );
        $maxrev =~ s/1\.//go;  # cut major
	if( $rev )
	{
	    if( $rev < 1 )       { $rev = 1; }
            if( $rev > $maxrev ) { $rev = $maxrev; }
	    $text= &wiki::readVersion( $topic, "1.$rev" );
	}
	else
	{
	    $text= &wiki::readTopic( $topic );
	    $rev= $maxrev;
	}
    }
    else
    {
	$rev = 1;
	if( &wiki::isWikiName( $topic ) )
	{
	    $text= &wiki::readTemplate( "notext" );
	}
	else
	{
	    $text= &wiki::readTemplate( "notwiki" );
	}
    }
    $text = &wiki::handleCommonTags( $text, $topic );
    $text = &wiki::getRenderedVersion( $text );

    if( $rev < $maxrev )
    {
        # disable edit of previous revisions
        $tmpl =~ s/%EDITTOPIC%/Edit/go;
        $tmpl =~ s/%REVTITLE%/\(r1.$rev\)/go;
    }
    else
    {
        if( $topicExists )
        {
            $tmpl =~ s/%EDITTOPIC%/<A href=\"..\/..\/edit\/%WEB%\/%TOPIC%\"><B>Edit<\/B><\/A>/go; 
        }
        else
        {
            $tmpl =~ s/%EDITTOPIC%/<A href=\"..\/..\/edit\/%WEB%\/%TOPIC%\"><B>Create<\/B><\/A>/go; 
        }
        $tmpl =~ s/%REVTITLE%//go;
    }

    my $i = $maxrev;
    my $j = $maxrev;
#    my $revisions = "";
#
#    while( $i > 0 )
#    {
#        if( $i eq $rev)
#        {
#            $revisions = "$revisions | r1.$i";
#        }
#        else
#        {
#            $revisions = "$revisions | <A href=\"../../view/%WEB%/%TOPIC%?rev=1.$i\">r1.$i</A>";
#        }
#        if( $i != 1 )
#        {
#            $j = $i - 1;
#            $revisions = "$revisions | <A href=\"../../rdiff/%WEB%/%TOPIC%?rev1=1.$i&rev2=1.$j\">&gt;</A>";
#        }
#        $i = $i - 1;
#    }


    my $revisions = "";
    my $revs1     = "";
    my $revs2     = "";
    
    while( $i > 0 )
    {
	$revs1 = "$revs1 <OPTION VALUE=\"1.$i\"";
	$revs2 = "$revs2 <OPTION VALUE=\"1.$i\"";

        if( $i eq $rev)
        {
            $revs1 = "$revs1 SELECTED ";

        }
	
	
        if( $i eq $rev - 1 )
        {
            $revs2 = "$revs2 SELECTED ";

        }

	$revs1 = "$revs1 >1.$i</OPTION>";
	$revs2 = "$revs2 >1.$i</OPTION>";
	
        $i = $i - 1;
    }


    $revisions = "$revisions <TABLE BORDER=1>";
    $revisions = "$revisions <TR><TD>";

    $revisions = "$revisions <FONT SIZE=\"-1\">";
    $revisions = "$revisions <FORM ACTION=\"../../view/%WEB%/%TOPIC%\" METHOD=GET >";
    $revisions = "$revisions <INPUT TYPE=submit VALUE=\"Go ->\"></INPUT>";
    $revisions = "$revisions <SELECT NAME=\"rev\">";
    $revisions = "$revisions $revs1";    
    $revisions = "$revisions </SELECT>";
    $revisions = "$revisions </FORM>";
    $revisions = "$revisions </FONT>";

    $revisions = "$revisions </TD><TD>";

    $revisions = "$revisions <FONT SIZE=\"-1\">";
    $revisions = "$revisions <FORM ACTION=\"../../rdiff/%WEB%/%TOPIC%\" METHOD=GET >";
    $revisions = "$revisions <SELECT NAME=\"rev1\">";
    $revisions = "$revisions $revs1";    
    $revisions = "$revisions </SELECT>";
    $revisions = "$revisions <INPUT TYPE=submit VALUE=\"Diff\"></INPUT>";
    $revisions = "$revisions <SELECT NAME=\"rev2\">";
    $revisions = "$revisions $revs2";    
    $revisions = "$revisions </SELECT>";
    $revisions = "$revisions </FORM>";
    $revisions = "$revisions </FONT>";

    $revisions = "$revisions </TD></TR>";
    $revisions = "$revisions </TABLE>";


    $tmpl =~ s/%REVISIONS%/$revisions/go;

    if( $topicExists )
    {
        my( $date, $user ) = &wiki::getRevisionInfo( $topic, "1.$rev", 1 );
        $user = &wiki::userToWikiName( $user );
        my $temp = &wiki::getRenderedVersion( "r1.$rev - $date by $user" );
        $tmpl =~ s/%REVINFO%/$temp/go;
    }
    else
    {
        $tmpl =~ s/%REVINFO%//go;
    }

    $tmpl = &wiki::handleCommonTags( $tmpl, $topic );
    $tmpl =~ s/%TEXT%/$text/go;
    print $tmpl;
}