#!/usr/bin/perl -w

use strict;
use warnings;
use MIME::Parser;
use MIME::Entity;
use MIME::Body;

my (@body, $i, $subentity);
my $parser = new MIME::Parser;

my $to;      #contains the message to header
my $from;    #contains the message from header
my $subject; #contains the message subject heaer
my $body;    #contains the message body

$parser->ignore_errors(1);
$parser->output_to_core(1);

my $entity = $parser->parse(\*STDIN);
my $error = ($@ || $parser->last_error);

#get email headers
my $header = $entity->head;
$subject = $header->get('Subject');
$to = $header->get('To');
$from = $header->get('From');

chomp($subject);
chomp($to);
chomp($from);

#get email body
if ($entity->parts > 0){
    for ($i=0; $i<$entity->parts; $i++){
        
        $subentity = $entity->parts($i);
        
        if (($subentity->mime_type =~ m/text\/html/i) || ($subentity->mime_type =~ m/text\/plain/i)){
            $body = join "",  @{$subentity->body};
        }
        
        #this elsif is needed for Outlook's
        #nasty multipart/alternative messages
        elsif ($subentity->mime_type =~ m/multipart\/alternative/i){

            $body = join "",  @{$subentity->body};
            
            #split html and text parts
            @body = split /------=_NextPart_\S*\n/, $body;
            
            #assign the first part of the message,
            #hopefully the text part, as the body
            $body = $body[1]; 
            
            #remove leading headers from body
            $body =~ s/^Content-Type.*Content-Transfer-Encoding.*?\n+//is
        }
    }
} else {
   $body = join "",  @{$entity->body};
}

#body may contain html tags. they will be stripped here
$body =~ s/(<br>)|(<p>)/\n/gi;           #create new lines
$body =~ s/<.+\n*.*?>//g;                #remove all <> html tages
$body =~ s/(\n|\r|(\n\r)|(\r\n)){3,}//g; #remove any extra new lines
$body =~ s/\&nbsp;//g;                   #remove html &nbsp characters

#remove trailing whitespace from body
$body =~ s/\s*\n+$//s;

open MAIL, ("|/usr/sbin/sendmail -t") || die "Unable to send mail: $!";
print MAIL "To: $from\n";
print MAIL "From: root\n";
print MAIL "Subject: mime parser test\n\n";

print MAIL "Messege was contructed as follows:
\$from:    $from
\$to:      $to
\$subject: $subject

\$body:    $body";

close(MAIL);