1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
<?php
/**
* @author Bart Visscher <bartv@thisnet.nl>
* @author Jakob Sack <mail@jakobsack.de>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Sam Tuke <mail@samtuke.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @copyright Copyright (c) 2016, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
class OC_Hook{
public static $thrownExceptions = [];
static private $registered = array();
/**
* connects a function to a hook
*
* @param string $signalClass class name of emitter
* @param string $signalName name of signal
* @param string|object $slotClass class name of slot
* @param string $slotName name of slot
* @return bool
*
* This function makes it very easy to connect to use hooks.
*
* TODO: write example
*/
static public function connect($signalClass, $signalName, $slotClass, $slotName ) {
// If we're trying to connect to an emitting class that isn't
// yet registered, register it
if( !array_key_exists($signalClass, self::$registered )) {
self::$registered[$signalClass] = array();
}
// If we're trying to connect to an emitting method that isn't
// yet registered, register it with the emitting class
if( !array_key_exists( $signalName, self::$registered[$signalClass] )) {
self::$registered[$signalClass][$signalName] = array();
}
// don't connect hooks twice
foreach (self::$registered[$signalClass][$signalName] as $hook) {
if ($hook['class'] === $slotClass and $hook['name'] === $slotName) {
return false;
}
}
// Connect the hook handler to the requested emitter
self::$registered[$signalClass][$signalName][] = array(
"class" => $slotClass,
"name" => $slotName
);
// No chance for failure ;-)
return true;
}
/**
* emits a signal
*
* @param string $signalClass class name of emitter
* @param string $signalName name of signal
* @param mixed $params default: array() array with additional data
* @return bool true if slots exists or false if not
* @throws \OC\HintException
* @throws \OC\ServerNotAvailableException Emits a signal. To get data from the slot use references!
*
* TODO: write example
*/
static public function emit($signalClass, $signalName, $params = []) {
// Return false if no hook handlers are listening to this
// emitting class
if( !array_key_exists($signalClass, self::$registered )) {
return false;
}
// Return false if no hook handlers are listening to this
// emitting method
if( !array_key_exists( $signalName, self::$registered[$signalClass] )) {
return false;
}
// Call all slots
foreach( self::$registered[$signalClass][$signalName] as $i ) {
try {
call_user_func( array( $i["class"], $i["name"] ), $params );
} catch (Exception $e){
self::$thrownExceptions[] = $e;
\OC::$server->getLogger()->logException($e);
if($e instanceof \OC\HintException) {
throw $e;
}
if($e instanceof \OC\ServerNotAvailableException) {
throw $e;
}
}
}
return true;
}
/**
* clear hooks
* @param string $signalClass
* @param string $signalName
*/
static public function clear($signalClass='', $signalName='') {
if ($signalClass) {
if ($signalName) {
self::$registered[$signalClass][$signalName]=array();
}else{
self::$registered[$signalClass]=array();
}
}else{
self::$registered=array();
}
}
/**
* DO NOT USE!
* For unit tests ONLY!
*/
static public function getHooks() {
return self::$registered;
}
}
|
