90 lines
2.1 KiB
PHP
90 lines
2.1 KiB
PHP
<?php
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/**
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* Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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namespace OC\Hooks;
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abstract class BasicEmitter implements Emitter {
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/**
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* @var (callable[])[] $listeners
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*/
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private $listeners = array();
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/**
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* @param string $scope
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* @param string $method
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* @param callable $callback
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*/
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public function listen($scope, $method, $callback) {
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$eventName = $scope . '::' . $method;
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if (!isset($this->listeners[$eventName])) {
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$this->listeners[$eventName] = array();
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}
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if (array_search($callback, $this->listeners[$eventName]) === false) {
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$this->listeners[$eventName][] = $callback;
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}
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}
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/**
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* @param string $scope optional
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* @param string $method optional
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* @param callable $callback optional
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*/
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public function removeListener($scope = null, $method = null, $callback = null) {
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$names = array();
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$allNames = array_keys($this->listeners);
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if ($scope and $method) {
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$name = $scope . '::' . $method;
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if (isset($this->listeners[$name])) {
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$names[] = $name;
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}
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} elseif ($scope) {
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foreach ($allNames as $name) {
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$parts = explode('::', $name, 2);
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if ($parts[0] == $scope) {
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$names[] = $name;
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}
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}
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} elseif ($method) {
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foreach ($allNames as $name) {
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$parts = explode('::', $name, 2);
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if ($parts[1] == $method) {
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$names[] = $name;
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}
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}
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} else {
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$names = $allNames;
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}
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foreach ($names as $name) {
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if ($callback) {
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$index = array_search($callback, $this->listeners[$name]);
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if ($index !== false) {
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unset($this->listeners[$name][$index]);
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}
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} else {
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$this->listeners[$name] = array();
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}
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}
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}
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/**
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* @param string $scope
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* @param string $method
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* @param array $arguments optional
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*/
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protected function emit($scope, $method, $arguments = array()) {
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$eventName = $scope . '::' . $method;
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if (isset($this->listeners[$eventName])) {
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foreach ($this->listeners[$eventName] as $callback) {
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call_user_func_array($callback, $arguments);
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}
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}
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}
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}
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