103 lines
2.6 KiB
PHP
103 lines
2.6 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Robin Appelman <robin@icewind.nl>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Hooks;
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trait EmitterTrait {
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/**
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* @var callable[][] $listeners
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*/
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protected $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, callable $callback) {
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$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], true) === 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, callable $callback = null) {
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$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], true);
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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, array $arguments = array()) {
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$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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