#!/usr/bin/perl
# Fig. 17.10: forum.pl
# Display forum postings for non-XSL browser

use warnings;
use strict;
use CGI qw( :standard *center *table );
use XML::Parser;
use Fcntl qw( :flock );

print redirect( "error.html" ) if not param;

my ( $file, $parser, %info );

$file = param( "file" );
$file  =~ /^\w+\.xml$/             or die "Not a valid file: $!";
open  FORUM, "../htdocs/XML/$file" or die "Could not open: $!";
flock FORUM, LOCK_SH;

$parser = new XML::Parser( Style    => "Subs",
                           Handlers => { Char => \&text } );
$parser->parse( \*FORUM );
close FORUM;

sub forum
{
   print header;
}

sub forum_
{
   print br, start_center,
 
      a( { -href => "../cgi-bin/addPost.pl?file=$file" },
           "Post a Message" ),
      br, br,
      a( { -href => "../cgi-bin/default.pl" }, 
           "Return to Main Page" ),
      end_center, end_html;
}

sub name_
{
   print start_html( -title => $info{ "name" },
                     -style => { -src => "../XML/site.css" } ),

         start_table( { -width       => "100%",
                     -cellspacing => "0",
                     -cellpadding => "2"    } ),

         Tr( td( { -class => "forumTitle" }, $info{ "name" } ) ),

         end_table, br;
}

sub message
{
   my ( $expat, $element, %attributes ) = @_;
   $info{ "date" } = $attributes{ "timestamp" };
}

sub message_
{
   print start_table( { -width       => "100%",
                        -cellspacing => "0",
                        -cellpadding => "2"     } ), 
      
      Tr( [ td( { -class   => "msgTitle" }, $info{ "title" } ),

            td( { -class   => "msgInfo"  }, 
                " by " . em( $info{ "user" } ) . " at " .
                span( { -class => "date" }, $info{ "date" } ) ),

            td( { -class   => "msgText"  }, $info{ "text" } ) ] ),

      end_table;
}
                                                    
sub text
{
   my ( $expat, $string ) = @_;
   $info{ $expat->current_element } = $string;
}


###########################################################################
#  (C) Copyright 2001 by Deitel & Associates, Inc. and Prentice Hall.     #
#  All Rights Reserved.                                                   #
#                                                                         #
#  DISCLAIMER: The authors and publisher of this book have used their     #
#  best efforts in preparing the book. These efforts include the          #
#  development, research, and testing of the theories and programs        #
#  to determine their effectiveness. The authors and publisher make       #
#  no warranty of any kind, expressed or implied, with regard to these    #
#  programs or to the documentation contained in these books. The authors #
#  and publisher shall not be liable in any event for incidental or       #
#  consequential damages in connection with, or arising out of, the       #
#  furnishing, performance, or use of these programs.                     #
###########################################################################