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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OC\Hooks;
/**
* @deprecated 18.0.0 use events and the \OCP\EventDispatcher\IEventDispatcher service
*/
trait EmitterTrait {
/**
* @var callable[][] $listeners
*/
protected $listeners = [];
/**
* @param string $scope
* @param string $method
* @param callable $callback
* @deprecated 18.0.0 use \OCP\EventDispatcher\IEventDispatcher::addListener
*/
public function listen($scope, $method, callable $callback) {
$eventName = $scope . '::' . $method;
if (!isset($this->listeners[$eventName])) {
$this->listeners[$eventName] = [];
}
if (!in_array($callback, $this->listeners[$eventName], true)) {
$this->listeners[$eventName][] = $callback;
}
}
/**
* @param string $scope optional
* @param string $method optional
* @param callable $callback optional
* @deprecated 18.0.0 use \OCP\EventDispatcher\IEventDispatcher::removeListener
*/
public function removeListener($scope = null, $method = null, ?callable $callback = null) {
$names = [];
$allNames = array_keys($this->listeners);
if ($scope and $method) {
$name = $scope . '::' . $method;
if (isset($this->listeners[$name])) {
$names[] = $name;
}
} elseif ($scope) {
foreach ($allNames as $name) {
$parts = explode('::', $name, 2);
if ($parts[0] == $scope) {
$names[] = $name;
}
}
} elseif ($method) {
foreach ($allNames as $name) {
$parts = explode('::', $name, 2);
if ($parts[1] == $method) {
$names[] = $name;
}
}
} else {
$names = $allNames;
}
foreach ($names as $name) {
if ($callback) {
$index = array_search($callback, $this->listeners[$name], true);
if ($index !== false) {
unset($this->listeners[$name][$index]);
}
} else {
$this->listeners[$name] = [];
}
}
}
/**
* @param string $scope
* @param string $method
* @param array $arguments optional
* @deprecated 18.0.0 use \OCP\EventDispatcher\IEventDispatcher::dispatchTyped
*/
protected function emit($scope, $method, array $arguments = []) {
$eventName = $scope . '::' . $method;
if (isset($this->listeners[$eventName])) {
foreach ($this->listeners[$eventName] as $callback) {
call_user_func_array($callback, $arguments);
}
}
}
}
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