#!/usr/bin/perl
# Perl Monks Forum Post Formatter, by David Caughell, grasp_the_sun@yahoo.co.uk
# Changes end-of-line chars to <br>'s, and avoids "code" . ">" sections

use strict;
use warnings;

use CGI qw(:standard -debug);

# output in text format to allow cutting and pasting
print "Content-type: text/plain\n\n\n";

my $post = param('FPost');
my $match = "code" . ">";

my $target = 0;
my $numoccur = 0;

# while there are matches from the target onwards
while (index(lc($post),$match,$target) != -1) {
    ++$numoccur;
    # if they're an opening match
    if ($numoccur % 2 == 1) {
 # make substitutions from previous target to new target
 substr($post,$target,index(lc($post),$match,$target) - $target) =~ s/\n/<br>/g;
    }

    $target = index(lc($post),$match,$target) + length($match) - 1; # the "<"
}

# either close the code block or do the final substitution
if ($numoccur % 2 == 1) {
    $post = $post . $match;
}
else {
    substr($post,$target) =~ s/\n/<br>/g;
}

print "$post\n\n\n\n\n";

# for all you other-language programmers out there, here are some statistics:
# lines of source: 39
# empty lines: 9
# commenting (shebang to be considered code): 7
# lines containing only "}": 4
# lines of code: 19