134 lines
3.4 KiB
PHP
134 lines
3.4 KiB
PHP
<?php
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/**
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* Vvveb
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*
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* Copyright (C) 2022 Ziadin Givan
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*
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* This program 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 as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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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
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Vvveb\System;
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trait EventTrait {
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static function trigger($method, $params = NULL) {
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if ($params === NULL) {
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return $params = \Vvveb\System\Event::trigger(__CLASS__, $method);
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} else {
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return $params = \Vvveb\System\Event::trigger(__CLASS__, $method, $params);
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}
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}
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public static function on($namespace, $name, $id, $callback, $priority = 0) {
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return $params = \Vvveb\System\Event::on($namespace, $name, __CLASS__ . '::' . $id, $callback, $priority);
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}
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}
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class Event {
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private static $events = [];
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private function __construct() {
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}
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private function __clone() {
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}
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public static function on($namespace, $name, $id, $callback, $priority = 1000) {
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if (empty(self::$events[$namespace][$name][$priority])) {
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self::$events[$namespace][$name][$priority] = [];
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}
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self::$events[$namespace][$name][$priority][$id] = $callback;
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ksort(self::$events[$namespace][$name], SORT_NUMERIC);
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}
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public static function trigger($namespace, $name) {
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$hasParams = false;
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$params = func_get_args();
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$params = array_slice($params, 2);
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if (empty(self::$events[$namespace][$name])) {
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return $params;
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}
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//$params can be changed by events and be empty, set flag so that we know to return it
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if (isset($params[0])) {
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$hasParams = true;
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}
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foreach (self::$events[$namespace][$name] as $priority => $events) {
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foreach ($events as $id => $event) {
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if (is_callable($event)) {
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if ($hasParams) {
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$ret = call_user_func_array($event, $params);
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//if event does not filter parameters or someone forgot to return them keep previous parameters
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if ($ret !== null) {
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$params = $ret;
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}
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} else {
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call_user_func($event);
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}
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}
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}
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}
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if ($hasParams) {
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return $params;
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}
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}
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public static function off($namespace, $name = false, $eventId = false) {
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if ($eventId && ! empty(self::$events[$namespace][$name])) {
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foreach (self::$events[$namespace][$name] as $priority => &$events) {
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foreach ($events as $id => $event) {
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if ($id == $eventId) {
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unset($events[$id]);
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break 2;
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return true;
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}
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}
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}
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} else {
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if ($name && ! empty(self::$events[$namespace][$name])) {
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unset(self::$events[$namespace][$name]);
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return true;
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} else {
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if ($namespace && ! empty(self::$events[$namespace])) {
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unset(self::$events[$namespace]);
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return true;
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}
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}
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}
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return false;
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}
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public static function getEvents($namespace = false, $name = false) {
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if ($name) {
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return self::$events[$namespace][$name] ?? [];
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} else {
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if ($namespace) {
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return self::$events[$namespace] ?? [];
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}
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}
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return self::$events;
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}
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}
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