pbot/PBot/EventDispatcher.pm

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

package PBot::EventDispatcher;
use parent 'PBot::Class';

use warnings; use strict;
use feature 'unicode_strings';

use IO::Select;

sub initialize {
  my ($self, %conf) = @_;
  $self->{handlers} = { any => [] };
}

sub register_handler {
  my ($self, $event_type, $sub, $package_override) = @_;
  my ($package) = caller(0);
  $package = $package_override if defined $package_override;
  my $info = "$package\-\>$event_type";
  $self->{pbot}->{logger}->log("Adding handler: $info\n") if $self->{pbot}->{registry}->get_value('eventdispatcher', 'debug');
  push @{$self->{handlers}->{$event_type}}, [$sub, $info];
}

sub remove_handler {
  my ($self, $event_type, $package_override) = @_;
  my ($package) = caller(0);
  $package = $package_override if defined $package_override;
  my $info = "$package\-\>$event_type";

  if (exists $self->{handlers}->{$event_type}) {
    for (my $i = 0; $i < @{$self->{handlers}->{$event_type}}; $i++) {
      my $ref = @{$self->{handlers}->{$event_type}}[$i];
      if ($info eq $ref->[1]) {
        $self->{pbot}->{logger}->log("Removing handler: $info\n") if $self->{pbot}->{registry}->get_value('eventdispatcher', 'debug');
        splice @{$self->{handlers}->{$event_type}}, $i--, 1;
      }
    }
  }
}

sub dispatch_event {
  my ($self, $event_type, $event_data) = @_;
  my $ret = undef;

  if (exists $self->{handlers}->{$event_type}) {
    for (my $i = 0; $i < @{$self->{handlers}->{$event_type}}; $i++) {
      my $ref = @{$self->{handlers}->{$event_type}}[$i];
      my ($handler, $info) = ($ref->[0], $ref->[1]);
      my $debug = $self->{pbot}->{registry}->get_value('eventdispatcher', 'debug') // 0;
      $self->{pbot}->{logger}->log("Dispatching $event_type to handler $info\n") if $debug > 1;

      eval {
        $ret = $handler->($event_type, $event_data);
      };

      if ($@) {
        chomp $@;
        $self->{pbot}->{logger}->log("Error in event handler: $@\n");
        #$self->{pbot}->{logger}->log("Removing handler.\n");
        #splice @{$self->{handlers}->{$event_type}}, $i--, 1;
      }
      return $ret if $ret;
    }
  }

  for (my $i = 0; $i < @{$self->{handlers}->{any}}; $i++) {
    my $ref = @{$self->{handlers}->{any}}[$i];
    my ($handler, $info) = ($ref->[0], $ref->[1]);
    $self->{pbot}->{logger}->log("Dispatching any to handler $info\n") if $self->{pbot}->{registry}->get_value('eventdispatcher', 'debug');

    eval {
      $ret = $handler->($event_type, $event_data);
    };

    if ($@) {
      chomp $@;
      $self->{pbot}->{logger}->log("Error in event handler: $@\n");
      #$self->{pbot}->{logger}->log("Removing handler.\n");
      #splice @{$self->{handlers}->{any}}, $i--, 1;
    }
    return $ret if $ret;
  }
  return $ret;
}

1;