mirror of
https://github.com/EGroupware/egroupware.git
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297 lines
9.7 KiB
PHP
297 lines
9.7 KiB
PHP
<?php
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/**
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* EGroupware API - Hooks
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*
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* @link http://www.egroupware.org
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* @author Dan Kuykendall <seek3r@phpgroupware.org>
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* Copyright (C) 2000, 2001 Dan Kuykendall
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* New method hooks and docu are written by <RalfBecker@outdoor-training.de>
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* @license http://opensource.org/licenses/lgpl-license.php LGPL - GNU Lesser General Public License
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* @package api
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* @version $Id$
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*/
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namespace EGroupware\Api;
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/**
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* Allow applications to set and use hooks to communicate with each other
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*
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* Hooks need to be declared in the app's setup.inc.php file and
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* are cached in instance cache for 1h.
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*
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* Clearing instance cache or calling Api\Hooks::read(true) forces a new scan.
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*
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* Hooks can have one of the following formats:
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* - static class method hooks are declared as:
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* $setup_info['appname']['hooks']['location'] = 'class::method';
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* - method hooks, which are methods of a class. You can pass parameters to the call and
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* they can return values. They get declared in setup.inc.php as:
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* $setup_info['appname']['hooks']['location'] = 'app.class.method';
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* - old type, which are included files. Values can only be passed by global values and they cant return anything.
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* Old declaration in setup.inc.php:
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* $setup_info['appname']['hooks'][] = 'location';
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*/
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class Hooks
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{
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/**
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* Hooks by location and appname
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*
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* @var array $location => $app => array($file, ...)
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*/
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protected static $locations;
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/**
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* Executes all the hooks (the user has rights to) for a given location
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*
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* If no $order given, hooks are executed in the order of the applications!
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*
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* @param string|array $args location-name as string or array with keys location and
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* further data to be passed to the hook, if its a new method-hook
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* @param string|array $order appname(s as value), which should be executes first
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* @param boolean $no_permission_check if True execute all hooks, not only the ones a user has rights to
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* $no_permission_check should *ONLY* be used when it *HAS* to be. (jengo)
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* @return array with results of each hook call (with appname as key) and value:
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* - False if no hook exists (should no longer be the case),
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* - True if old hook exists and
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* - array of return-values, if an app implements more then one hook
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* - whatever the new method-hook returns (can be True or False too!)
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*/
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public static function process($args, $order = array(), $no_permission_check = False)
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{
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//echo "<p>".__METHOD__.'('.array2string($args).','.array2string($order).','.array2string($no_permission_check).")</p>\n";
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$location = is_array($args) ? (isset($args['hook_location']) ? $args['hook_location'] : $args['location']) : $args;
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if (!isset(self::$locations)) self::read();
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$hooks = self::$locations[$location];
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if (!isset($hooks) || empty($hooks)) return array(); // not a single app implements that hook
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$apps = array_keys($hooks);
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if (!$no_permission_check)
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{
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// on install of a new egroupware both hook-apps and user apps may be empty/not set
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$apps = array_intersect((array)$apps,array_keys((array)$GLOBALS['egw_info']['user']['apps']));
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}
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if ($order)
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{
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$apps = array_unique(array_merge((array)$order,$apps));
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}
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$results = array();
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foreach((array)$apps as $appname)
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{
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$results[$appname] = self::single($args,$appname,$no_permission_check);
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}
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return $results;
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}
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/**
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* Executes a single hook of a given location and application
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*
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* @param string|array $args location-name as string or array with keys location, appname and
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* further data to be passed to the hook, if its a new method-hook
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* @param string $appname name of the app, which's hook to execute, if empty the current app is used
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* @param boolean $no_permission_check =false if True execute all hooks, not only the ones a user has rights to
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* $no_permission_check should *ONLY* be used when it *HAS* to be. (jengo)
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* @param boolean $try_unregistered =false If true, try to include old file-hook anyway (for setup)
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* @return mixed False if no hook exists, True if old hook exists and whatever the new method-hook returns (can be True or False too!).
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*/
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public static function single($args, $appname = '', $no_permission_check = False, $try_unregistered = False)
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{
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//error_log(__METHOD__."(".array2string($args).",'$appname','$no_permission_check','$try_unregistered')");
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if (!isset(self::$locations)) self::read();
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if (!is_array($args)) $args = array('location' => $args);
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$location = isset($args['hook_location']) ? $args['hook_location'] : $args['location'];
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if (!$appname)
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{
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$appname = is_array($args) && isset($args['appname']) ? $args['appname'] : $GLOBALS['egw_info']['flags']['currentapp'];
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}
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// excute hook only if $no_permission_check or user has run-rights for app
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if (!($no_permission_check || isset($GLOBALS['egw_info']['user']['apps'][$appname])))
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{
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return false;
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}
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$ret = array();
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foreach((array)self::$locations[$location][$appname] as $hook)
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{
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try {
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// old style file hook
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if ($hook[0] == '/')
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{
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if (!file_exists(EGW_SERVER_ROOT.$hook))
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{
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error_log(__METHOD__."() old style hook file '$hook' not found --> ignored!");
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continue;
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}
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include(EGW_SERVER_ROOT.$hook);
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return true;
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}
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list($class, $method) = explode('::', $hook);
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// static method of an autoloadable class
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if (isset($method) && class_exists($class))
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{
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if (is_callable($hook)) $ret[] = call_user_func($hook, $args);
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}
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// app.class.method or not autoloadable class
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else
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{
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$ret[] = ExecMethod2($hook, $args);
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}
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}
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catch (Api\Exception\AssertionFailed $e)
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{
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if (preg_match('/ file .+ not found!$/', $e->getMessage()))
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{
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// ignore not found hook
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}
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else
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{
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throw $e;
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}
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}
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}
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// hooks only existing in filesystem used by setup
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if (!$ret && $try_unregistered && file_exists(EGW_SERVER_ROOT.($hook='/'.$appname.'/inc/hook_'.$location.'.inc.php')))
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{
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include(EGW_SERVER_ROOT.$hook);
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return true;
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}
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if (!$ret) return false;
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return count($ret) == 1 ? $ret[0] : $ret;
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}
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/**
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* loop through the applications and count the apps implementing a hooks
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*
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* @param string $location location-name
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* @return int the number of found hooks
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*/
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public static function count($location)
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{
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if (!isset(self::$locations)) self::read();
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return count(self::$locations[$location]);
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}
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/**
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* check if a given hook for an application is registered
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*
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* @param string $location location-name
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* @param string $app appname
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* @param boolean $return_methods =false true: return hook-method(s)
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* @return int|array the number of found hooks or for $return_methods array with methods
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*/
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public static function exists($location, $app, $return_methods=false)
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{
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if (!isset(self::$locations)) self::read();
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//error_log(__METHOD__.__LINE__.array2string(self::$locations[$location]));
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return $return_methods ? self::$locations[$location][$app] :
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(empty(self::$locations[$location][$app]) ? 0 : count(self::$locations[$location][$app]));
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}
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/**
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* check which apps implement a given hook
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*
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* @param string $location location-name
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* @return array of apps implementing given hook
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*/
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public static function implemented($location)
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{
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if (!isset(self::$locations)) self::read();
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//error_log(__METHOD__.__LINE__.array2string(self::$locations[$location]));
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return isset(self::$locations[$location]) ? array_keys(self::$locations[$location]) : array();
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}
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/**
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* Disable a hook for this request
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*
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* @param string $hook
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* @return boolean true if hook existed, false otherwise
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*/
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static public function disable($hook)
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{
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if (!isset(self::$locations)) self::read();
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$ret = isset(self::$locations[$hook]);
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unset(self::$locations[$hook]);
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return $ret;
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}
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/**
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* Read all hooks into self::$locations
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*
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* @param boolan $force_rescan =false true: do not use instance cache
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*/
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public static function read($force_rescan=false)
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{
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//$starttime = microtime(true);
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if ($force_rescan) Cache::unsetInstance(__CLASS__, 'locations');
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self::$locations = Cache::getInstance(__CLASS__, 'locations', function()
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{
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// if we run in setup, we need to read installed apps first
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if (!$GLOBALS['egw_info']['apps'])
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{
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$applications = new Egw\Applications();
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$applications->read_installed_apps();
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}
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// read all apps using just filesystem data
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$locations = array();
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foreach(array_merge(array('api'), array_keys($GLOBALS['egw_info']['apps'])) as $appname)
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{
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if ($appname[0] == '.' || !is_dir(EGW_SERVER_ROOT.'/'.$appname)) continue;
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$f = EGW_SERVER_ROOT . '/' . $appname . '/setup/setup.inc.php';
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$setup_info = array($appname => array());
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if(@file_exists($f)) include($f);
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// some apps have setup_info for more then themselfs (eg. api for groupdav)
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foreach($setup_info as $appname => $data)
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{
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foreach((array)$data['hooks'] as $location => $methods)
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{
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if (is_int($location))
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{
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$location = $methods;
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$methods = '/'.$appname.'/inc/hook_'.$methods.'.inc.php';
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}
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$locations[$location][$appname] = (array)$methods;
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}
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}
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}
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return $locations;
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}, array(), 3600);
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//error_log(__METHOD__."() took ".number_format(1000*(microtime(true)-$starttime), 1)."ms, size=".Vfs::hsize(strlen(json_encode(self::$locations))));
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}
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/**
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* Static function to build pgp encryption sidebox menu
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* @param type $appname application name
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*/
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public static function pgp_encryption_menu($appname)
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{
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if (Header\UserAgent::mobile()) return;
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// PGP Encryption (Mailvelope plugin) restore/backup menu
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$file = Array(
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'Backup/Restore ...' => 'javascript:app.'.$appname.'.mailvelopeCreateBackupRestoreDialog();',
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'sendToBottom' => true
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);
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display_sidebox($appname, lang('PGP Encryption'), $file);
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}
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}
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