# -*- perl -*-
# Blosxom Plugin: xml_ping_generic
# Author(s): Axel Beckert <blosxom@deuxchevaux.org>, http://noone.org/blog
#            Bob Schumaker <cobblers@pobox.com>
#            Rael Dornfest <rael@oreilly.com> 
# Version: 0.01-2.0b4
# xml_ping_generic web page: http://noone.org/blog?-tags=Pinging
# xml_ping_generic download: http://noone.org/blosxom/xml_ping_generic
# Blosxom web page: http://www.blosxom.com/
# Documentation: See the bottom of this file or type: perldoc xml_ping_weblogs

package xml_ping_generic;

$VERSION = '0.01-2.0b4';

# --- Configurable variables -----

# What URL should this plugin ping?
require LWP::UserAgent;
use FileHandle;
use File::stat;
#use Data::Dumper;

# Keep track of the newest story's mtime
my $newest = 0;

my @urls_to_ping = 
    qw(

     http://rpc.technorati.com/rpc/ping
     http://rpc.weblogs.com/RPC2

       );

sub start {


    return 1;
}

sub filter {
    my($pkg, $files_ref) = @_;

    my %mtimes = ();
    foreach my $file (keys %$files_ref) {
	$mtimes{$file} = stat($file)->mtime;
    }

    $newest_file = ( sort { $mtimes{$b} <=> $mtimes{$a} } keys %mtimes )[0];
    $newest = $mtimes{$newest_file};

    return 1;
}

sub end {
    my $lockfile = "$blosxom::plugin_state_dir/.ping.lock";
    my $outfile = "$blosxom::plugin_state_dir/.ping.output";

    #print STDERR "lockfile=".(-e $lockfile)." preview=$preview::is_preview newest=".localtime($newest)." mtime=".localtime(stat($outfile)->mtime)." newest_file=$newest_file\n";

    return 1 if (-e $lockfile or $preview::is_preview );

    # If no timestamped touch-file or newest is newer than the touch-file...
    if (!-e $outfile or $newest > stat($outfile)->mtime) {

	open(LOCK, ">$lockfile");
	close(LOCK);

	# Okay, so we can't encode the values, we have to leave the
	# slashes in and all.

	my $blog_name = $blosxom::blog_title;
	my $blog_url  = $blosxom::url;
	
	my $content = <<EOF;
<?xml version="1.0"?>
<methodCall>
  <methodName>weblogUpdates.ping</methodName>
  <params>
     <param><value>$blog_name</value></param>
     <param><value>$blog_url</value></param>
  </params>
</methodCall>
EOF
        # Touch the touchfile (creates if doesn't already exist)
        open TOUCH, "> $blosxom::plugin_state_dir/.ping.output";

        foreach my $url_to_ping (@urls_to_ping) {
	    $header = new HTTP::Headers;
	    (my $host = $urls_to_ping) =~ s!http://(.*?)/.*$!$1!;
	    $header->header( User_Agent => "blosxom/2.0-abe-dev xml_ping_weblogs/$VERSION",
			     Host => $host,
			     Content_Type => 'text/xml',
			     Content_Length => length($content) );
	
	    $request = HTTP::Request->new('POST', 
					  $url_to_ping,
					  $header,
					  $content);
	
	    $ua = LWP::UserAgent->new;
	    $response = $ua->request($request);

	    #my $result = $response->{_content};
	    #$result =~ /Thanks for the ping/ or return 0;

	    my $result = $response->as_string;
	    my $reqas  = $request->as_string;
	    print TOUCH "$reqas\n$result\n";
	}
	close TOUCH;
	unlink $lockfile;

    }
  
    return 1;
}

sub encode {
    my ($string) = @_;
    
    $string =~ s/([^-A-Za-z0-9_.!~*\'()])/sprintf('%%%02X', $1)/ge;

    return $string;
}

1;

__END__

=pod

=head1 NAME

Blosxom Plug-in: xml_ping_generic

=head1 SYNOPSIS

Purpose: Notifies one or more configurable pages via weblogs.com's XML
RPC API ping that your weblog has been updated upon encountering any
new story. By default it informs weblogs.com and technorati.com.

Maintains a touch-file ($blosxom::plugin_state_dir/.ping.output) to
which to compare the newest story's creation date. (In comparsion to
the original xml_ping_weblogs this point works fine with Rael's
entries_caching index module, too.) Fills the touch-file with the sent
HTTP and XML requests and responses of the latest ping.

=head1 VERSION

0.01-2.0b4

Second part of version number coincides with the version of Bob
Schumaker's xml_ping_weblogs plugin, it's based on.

=head1 AUTHOR

Axel Beckert <abe@deuxchevaux.org>

Based on the xml_ping_weblogs plugin by Bob Schumaker
<cobblers@pobox.com>, http://www.cobblers.net/blog/

=head1 SEE ALSO

Blosxom Home/Docs/Licensing: http://www.raelity.org/apps/blosxom/

Blosxom Plugin Docs: http://www.raelity.org/apps/blosxom/plugin.shtml

=head1 BUGS

Address bug reports and comments to the Blosxom mailing list 
[http://www.yahoogroups.com/group/blosxom].

=head1 LICENSE

Blosxom and this Blosxom Plug-in
Copyright 2003, Rael Dornfest 

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.