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pbot/PBot/EventDispatcher.pm
2021-06-18 21:23:34 -07:00

89 lines
3.1 KiB
Perl

# File: EventDispatcher.pm
#
# Purpose: Registers event handlers and dispatches events to them.
# 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 PBot::Imports;
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;