#!/usr/bin/perl

=head1 NAME

asterisk_fax_* - Plugin to monitor Asterisk fax parameters.

=head1 SUPPORTED VERSION

This plugin supports Asterisk 1.4.* and Digiums Fax For Asterisk (FFA) modules.

=head1 CONFIGURATION

The following configuration parameters are used by this plugin

 [asterisk*]
  env.host     - hostname to connect to. Defaults to localhost.
  env.port     - port number to connect to. Defaults to 5038.
  env.username - username used for authentication. No default value.
  env.secret   - secret used for authentication. No default value.
  env.timeout  - AMI timeout value in seconds. Defaults to 5.

The "username" and "secret" parameters are mandatory, and have no
defaults.

=head1 DEFAULT CONFIGURATION

 [asterisk*]
  env.username manager
  env.secret insecure
  env.host 127.0.0.1
  env.port 5038
  env.timeout 5

=head1 REQUIRED PERL MODULES

This plugin requires the Asterisk::AMI module and its dependencies.
Its dependencies can be found here:
http://deps.cpantesters.org/?module=Asterisk::AMI;perl=latest


=head1 AUTHOR

Copyright (C) 2011 Frank DiGennaro <fsd@voipbusiness.us>

=head1 LICENSE

Gnu GPLv2

=begin comment

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; version 2 dated June, 1991.

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.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.

If you improve this script please send your version to my email
address with the copyright notice upgrade with your name.

=end comment

=head1 MAGIC MARKERS

 #%# family=contrib

=cut

    use Carp;
    use strict;
    use Asterisk::AMI;

    eval "use Asterisk::AMI"; 
    print "Asterisk::AMI not found. Exiting...\n" if $@;
    exit( 0 ) if $@;

    if ( $ARGV[ 0 ] and $ARGV[ 0 ] eq "config" ) {
        print "graph_title Asterisk Fax - Switched to T.38\n";
        print "graph_args --base 1000 -l 0\n";
        print "graph_vlabel Number of Switches to T.38\n";
        print "graph_category other\n";
        print "switched.draw AREA\n";
        print "switched.label Switches to T.38\n";
        exit 0;
    };

    my $host     = exists $ENV{ 'host'    } ? $ENV{ 'host'    } : "127.0.0.1";
    my $port     = exists $ENV{ 'port'    } ? $ENV{ 'port'    } : "5038";
    my $timeout  = exists $ENV{ 'timeout' } ? $ENV{ 'timeout' } : "5";
    my $username = $ENV{ 'username' };
    my $secret   = $ENV{ 'secret'   };

    my $astman = Asterisk::AMI->new(PeerAddr => "$host",
                                    PeerPort => "$port",
                                    Username => "$username",
                                    Secret   => "$secret"
    );

    croak "Unable to connect to asterisk" unless ( $astman );
    my $actionid = $astman->send_action({ Action => 'Command',
                                          Command => 'fax show stats',
                                          $timeout});
    my $response = $astman->get_response( $actionid );
    my $arrayref = $response->{CMD};
    my $null     = qq{};
    my ( %faxstats, $section );
    foreach my $line ( @$arrayref ) {
        next if ( ( ! $line ) || ( $line =~ /-----------/ ) );
        my ( $key, $value ) = split( ':', $line );
        $section = $key if ( $value eq $null );
        $key     =~ s/\s+$//g;
        $value   =~ s/^\s+//g;
        $faxstats{ "$section" }{ "$key" } = $value if ( $value ne $null );
    };
    $astman->disconnect;

    my $switched = $faxstats{'Digium G.711'}{'Switched to T.38'};
    print "switched.value $switched\n";

    exit( 0 );