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126 lines
3.3 KiB
PHP
126 lines
3.3 KiB
PHP
<?php
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/**
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* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
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* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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use Psr\Log\LoggerInterface;
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class OC_Hook {
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public static $thrownExceptions = [];
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private static $registered = [];
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/**
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* connects a function to a hook
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*
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* @param string $signalClass class name of emitter
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* @param string $signalName name of signal
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* @param string|object $slotClass class name of slot
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* @param string $slotName name of slot
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* @return bool
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*
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* This function makes it very easy to connect to use hooks.
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*
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* TODO: write example
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*/
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public static function connect($signalClass, $signalName, $slotClass, $slotName) {
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// If we're trying to connect to an emitting class that isn't
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// yet registered, register it
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if (!array_key_exists($signalClass, self::$registered)) {
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self::$registered[$signalClass] = [];
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}
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// If we're trying to connect to an emitting method that isn't
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// yet registered, register it with the emitting class
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if (!array_key_exists($signalName, self::$registered[$signalClass])) {
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self::$registered[$signalClass][$signalName] = [];
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}
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// don't connect hooks twice
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foreach (self::$registered[$signalClass][$signalName] as $hook) {
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if ($hook['class'] === $slotClass and $hook['name'] === $slotName) {
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return false;
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}
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}
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// Connect the hook handler to the requested emitter
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self::$registered[$signalClass][$signalName][] = [
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'class' => $slotClass,
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'name' => $slotName
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];
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// No chance for failure ;-)
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return true;
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}
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/**
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* emits a signal
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*
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* @param string $signalClass class name of emitter
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* @param string $signalName name of signal
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* @param mixed $params default: array() array with additional data
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* @return bool true if slots exists or false if not
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* @throws \OCP\HintException
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* @throws \OC\ServerNotAvailableException Emits a signal. To get data from the slot use references!
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*
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* TODO: write example
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*/
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public static function emit($signalClass, $signalName, $params = []) {
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// Return false if no hook handlers are listening to this
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// emitting class
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if (!array_key_exists($signalClass, self::$registered)) {
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return false;
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}
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// Return false if no hook handlers are listening to this
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// emitting method
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if (!array_key_exists($signalName, self::$registered[$signalClass])) {
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return false;
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}
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// Call all slots
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foreach (self::$registered[$signalClass][$signalName] as $i) {
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try {
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call_user_func([ $i['class'], $i['name'] ], $params);
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} catch (Exception $e) {
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self::$thrownExceptions[] = $e;
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\OCP\Server::get(LoggerInterface::class)->error($e->getMessage(), ['exception' => $e]);
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if ($e instanceof \OCP\HintException) {
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throw $e;
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}
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if ($e instanceof \OC\ServerNotAvailableException) {
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throw $e;
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}
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}
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}
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return true;
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}
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/**
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* clear hooks
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* @param string $signalClass
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* @param string $signalName
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*/
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public static function clear($signalClass = '', $signalName = '') {
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if ($signalClass) {
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if ($signalName) {
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self::$registered[$signalClass][$signalName] = [];
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} else {
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self::$registered[$signalClass] = [];
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}
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} else {
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self::$registered = [];
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}
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}
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/**
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* DO NOT USE!
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* For unit tests ONLY!
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*/
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public static function getHooks() {
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return self::$registered;
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}
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}
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