POE::Component::IRC::Plugin::Google::Calculator - non-blocking access to Google's calculator via IRC

    use strict;
    use warnings;

    use POE qw(Component::IRC  Component::IRC::Plugin::Google::Calculator);

    my $irc = POE::Component::IRC->spawn(
        nick        => 'CalcBot',
        server      => 'irc.freenode.net',
        port        => 6667,
        ircname     => 'Google Calculator Bot',
    );

    POE::Session->create(
        package_states => [
            main => [ qw(_start irc_001) ],
        ],
    );

    $poe_kernel->run;

    sub _start {
        $irc->yield( register => 'all' );

        $irc->plugin_add(
            'GoogleCalc' =>
                POE::Component::IRC::Plugin::Google::Calculator->new
        );

        $irc->yield( connect => {} );
    }

    sub irc_001 {
        $_[KERNEL]->post( $_[SENDER] => join => '#zofbot' );
    }

    <Zoffix> CalcBot, calc 2+2
    <CalcBot> Result: 2 + 2 = 4
    <Zoffix> CalcBot, calc USD in CAD
    <CalcBot> Result: 1 U.S. dollar = 0.99990001 Canadian dollars
    <Zoffix> CalcBot, calc mile in kilometer
    <CalcBot> Result: 1 mile = 1.609344 kilometer

This module is a POE::Component::IRC plugin which uses POE::Component::IRC::Plugin for its base. It provides access to Google calculator (http://www.google.ca/search?num=100&hl=en&q=2%2B2) from IRC. It accepts input from public channel events, /notice messages as well as /msg (private messages); although that can be configured at will.

    # plain and simple
    $irc->plugin_add(
        'GoogleCalc' => POE::Component::IRC::Plugin::Google::Calculator->new
    );

    # juicy flavor
    $irc->plugin_add(
        'GoogleCalc' =>
            POE::Component::IRC::Plugin::Google::Calculator->new(
                auto             => 1,
                response_event   => 'irc_google_calculator',
                banned           => [ qr/aol\.com$/i ],
                addressed        => 1,
                trigger          => qr/^calc\s+(?=\S)/i,
                listen_for_input => [ qw(public notice privmsg) ],
                eat              => 1,
                debug            => 0,
            )
    );

The new() method constructs and returns a new POE::Component::IRC::Plugin::Google::Calculator object suitable to be fed to POE::Component::IRC's plugin_add method. The constructor takes a few arguments, but all of them are optional. The possible arguments/values are as follows:

    ->new( auto => 0 );

Optional. Takes either true or false values, specifies whether or not the plugin should auto respond to calculation requests. When the auto argument is set to a true value plugin will respond to the person requesting calculation with the results automatically. When the auto argument is set to a false value plugin will not respond and you will have to listen to the events emited by the plugin to retrieve the results (see EMITED EVENTS section and response_event argument for details). Defaults to: 1.

    ->new( response_event => 'event_name_to_recieve_results' );

Optional. Takes a scalar string specifying the name of the event to emit when the results of calculation are ready. See EMITED EVENTS section for more information. Defaults to: irc_google_calculator

    ->new( banned => [ qr/aol\.com$/i ] );

Optional. Takes an arrayref of regexes as a value. If the usermask of the person (or thing) requesting the calculation matches any of the regexes listed in the banned arrayref, plugin will ignore the request. Defaults to: [] (no bans are set).

    ->new( trigger => qr/^calc\s+(?=\S)/i );

Optional. Takes a regex as an argument. Messages matching this regex will be considered as requests for calculation. See also addressed option below which is enabled by default. Note: the trigger will be removed from the message, therefore make sure your trigger doesn't match the actual data which is ment to be calculated. Defaults to: qr/^calc\s+(?=\S)/i

    ->new( addressed => 1 );

Optional. Takes either true or false values. When set to a true value all the public messages must be addressed to the bot. In other words, if your bot's nickname is CalcBot and your trigger is qr/^calc/ you would request the calculation by saying CalcBot, calc 2 + 2. When addressed mode is turned on, the bot's nickname, including any whitespace and common punctuation character will be removed before matching the trigger (see above). When addressed argument it set to a false value, public messages will only have to match trigger regex in order to request calculation. Note: this argument has no effect on /notice and /msg calculation requests. Defaults to: 1

    ->new( listen_for_input => [ qw(public  notice  privmsg) ] );

Optional. Takes an arrayref as a value which can contain any of the three elements, namely public, notice and privmsg which indicate which kind of input plugin should respond to. When the arrayref contains public element, plugin will respond to requests sent from messages in public channels (see addressed argument above for specifics). When the arrayref contains notice element plugin will respond to calculation requests sent to it via /notice messages. When the arrayref contains privmsg element, the plugin will respond to calculation requests sent to it via /msg (private messages). You can specify any of these. In other words, setting ( listen_for_input = [ qr(notice privmsg) ] )> will enable calculator only via /notice and /msg messages. Defaults to: [ qw(public notice privmsg) ]

    ->new( eat => 0 );

Optional. If set to a false value plugin will return a PCI_EAT_NONE after responding. If eat is set to a true value, plugin will return a PCI_EAT_ALL after responding. See POE::Component::IRC::Plugin documentation for more information if you are interested. Defaults to: 1

    ->new( debug => 1 );

Optional. Takes either a true or false value. When debug argument is set to a true value some debugging information will be printed out. When debug argument is set to a false value no debug info will be printed. Defaults to: 0.

    $VAR1 = {
        'who' => 'Zoffix!n=Zoffix@unaffiliated/zoffix',
        'type' => 'public',
        'channel' => '#zofbot',
        'message' => 'CalcBot, calc PHP in CAD',
        'term' => 'PHP in CAD',
        'result' => 'Result: 1 Philippine peso = 0.0244925507 Canadian dollars'
    };

The event handler set up to handle the event, name of which you've specified in the response_event argument to the constructor (it defaults to irc_google_calculator) will recieve input every time calculation request is completed. The input will come in the form of a hashref in ARG0. The keys/values of that hashref are as follows:

    { 'who' => 'Zoffix!n=Zoffix@unaffiliated/zoffix' }

The who key will contain the usermask of the user who requested the calculation.

    { 'type' => 'public' }

The type key will contain the "type" of the message sent by the requestor. The possible values are: public, notice and privmsg indicating that request was requested in public channel, via /notice and via /msg (private message) respectively.

    { 'channel' => '#zofbot' }

The channel key will contain the name of the channel from which the request came from. This will only make sense when type key (see above) contains public.

    { 'message' => 'CalcBot, calc PHP in CAD', }

The message key will contain the message which the user has sent to request the calculation.

    { 'term' => 'PHP in CAD' }

The term key will contain the term being calculated.

    { 'result' => 'Result: 1 Philippine peso = 0.0244925507 Canadian dollars' }

The result key will contain the result of the calculation in other words what you'd see the plugin say when auto (see constructor arguments) is turned on (that's the default). Note: the successful results will begin with Result: and if an error occured during the request, or no result was returned the result's value will begin with Error:.

Zoffix Znet, <zoffix at cpan.org> (http://zoffix.com, http://haslayout.net)

Please report any bugs or feature requests to bug-poe-component-irc-plugin-google-calculator at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=POE-Component-IRC-Plugin-Google-Calculator. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

You can find documentation for this module with the perldoc command.

    perldoc POE::Component::IRC::Plugin::Google::Calculator

You can also look for information at:

* RT: CPAN's request tracker

http://rt.cpan.org/NoAuth/Bugs.html?Dist=POE-Component-IRC-Plugin-Google-Calculator

* AnnoCPAN: Annotated CPAN documentation

http://annocpan.org/dist/POE-Component-IRC-Plugin-Google-Calculator

* CPAN Ratings

http://cpanratings.perl.org/d/POE-Component-IRC-Plugin-Google-Calculator

* Search CPAN

http://search.cpan.org/dist/POE-Component-IRC-Plugin-Google-Calculator

Copyright 2008 Zoffix Znet, all rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.