1
|
<?php
|
2
|
|
3
|
/**
|
4
|
* @file Contains classes for data processing.
|
5
|
*
|
6
|
* Data processors can be used to process element arguments on evaluation time,
|
7
|
* e.g. to apply input evaluators or to apply simple calculations to number
|
8
|
* arguments.
|
9
|
*/
|
10
|
|
11
|
/**
|
12
|
* Common base class for Rules data processors.
|
13
|
*/
|
14
|
abstract class RulesDataProcessor {
|
15
|
|
16
|
/**
|
17
|
* The processors' setting value.
|
18
|
*/
|
19
|
protected $setting = NULL;
|
20
|
|
21
|
/**
|
22
|
* Allows chaining processors. If set, the next processor to invoke.
|
23
|
*/
|
24
|
protected $processor = NULL;
|
25
|
|
26
|
/**
|
27
|
* Constructor.
|
28
|
*/
|
29
|
protected function __construct($setting, $param_info, $var_info = array(), $processor = NULL) {
|
30
|
$this->setting = $setting;
|
31
|
$this->processor = $processor;
|
32
|
}
|
33
|
|
34
|
/**
|
35
|
* Return $this or skip this processor by returning the next processor.
|
36
|
*/
|
37
|
protected function getPreparedValue() {
|
38
|
return isset($this->setting) && array_filter($this->setting) ? $this : $this->processor;
|
39
|
}
|
40
|
|
41
|
/**
|
42
|
* Returns whether the current user has permission to edit this chain of data
|
43
|
* processors.
|
44
|
*/
|
45
|
public function editAccess() {
|
46
|
return $this->access() && (!isset($this->processor) || $this->processor->editAccess());
|
47
|
}
|
48
|
|
49
|
|
50
|
/**
|
51
|
* Prepares the processor for parameters.
|
52
|
*
|
53
|
* It turns the settings into a suiting processor object, which gets invoked
|
54
|
* on evaluation time.
|
55
|
*
|
56
|
* @param $setting
|
57
|
* The processor settings which are to be prepared.
|
58
|
* @param $param_info
|
59
|
* The info about the parameter to prepare the processor for.
|
60
|
* @param $var_info
|
61
|
* An array of info about the available variables.
|
62
|
*/
|
63
|
public static function prepareSetting(&$setting, $param_info, $var_info = array()) {
|
64
|
$processor = NULL;
|
65
|
foreach (self::processors($param_info, FALSE) as $name => $info) {
|
66
|
if (!empty($setting[$name])) {
|
67
|
$object = new $info['class']($setting[$name], $param_info, $var_info, $processor);
|
68
|
$processor = $object->getPreparedValue();
|
69
|
}
|
70
|
}
|
71
|
$setting = $processor;
|
72
|
}
|
73
|
|
74
|
/**
|
75
|
* Attaches the form of applicable data processors.
|
76
|
*/
|
77
|
public static function attachForm(&$form, $settings, $param_info, $var_info, $access_check = TRUE) {
|
78
|
// If $settings is already prepared get the settings from the processors.
|
79
|
if ($settings instanceof RulesDataProcessor) {
|
80
|
$settings = $settings->getChainSettings();
|
81
|
}
|
82
|
foreach (self::processors($param_info, $access_check) as $name => $info) {
|
83
|
$settings += array($name => array());
|
84
|
$form[$name] = call_user_func(array($info['class'], 'form'), $settings[$name], $var_info);
|
85
|
$form[$name]['#weight'] = $info['weight'];
|
86
|
}
|
87
|
}
|
88
|
|
89
|
/**
|
90
|
* Returns defined data processors applicable for the given parameter.
|
91
|
* Optionally also access to the processors is checked.
|
92
|
*
|
93
|
* @param $param_info
|
94
|
* If given, only processors valid for this parameter are returned.
|
95
|
*/
|
96
|
public static function processors($param_info = NULL, $access_check = TRUE, $hook = 'data_processor_info') {
|
97
|
static $items = array();
|
98
|
|
99
|
if (!isset($items[$hook]['all'])) {
|
100
|
$items[$hook]['all'] = rules_fetch_data($hook);
|
101
|
uasort($items[$hook]['all'], array(__CLASS__, '_item_sort'));
|
102
|
}
|
103
|
// Data processing isn't supported for multiple types.
|
104
|
if (isset($param_info) && is_array($param_info['type'])) {
|
105
|
return array();
|
106
|
}
|
107
|
// Filter the items by type.
|
108
|
if (isset($param_info['type']) && !isset($items[$hook][$param_info['type']])) {
|
109
|
$items[$hook][$param_info['type']] = array();
|
110
|
foreach ($items[$hook]['all'] as $name => $info) {
|
111
|
// Check whether the parameter type matches the supported types.
|
112
|
$info += array('type' => 'text');
|
113
|
if (RulesData::typesMatch($param_info, $info, FALSE)) {
|
114
|
$items[$hook][$param_info['type']][$name] = $info;
|
115
|
}
|
116
|
}
|
117
|
}
|
118
|
// Apply the access check.
|
119
|
$return = isset($param_info['type']) ? $items[$hook][$param_info['type']] : $items[$hook]['all'];
|
120
|
if ($access_check) {
|
121
|
foreach ($return as $base => $info) {
|
122
|
if (!call_user_func(array($info['class'], 'access'))) {
|
123
|
unset($return[$base]);
|
124
|
}
|
125
|
}
|
126
|
}
|
127
|
return $return;
|
128
|
}
|
129
|
|
130
|
public static function _item_sort($a, $b) {
|
131
|
return $a['weight'] < $b['weight'] ? -1 : ($a['weight'] > $b['weight'] ? 1 : 0);
|
132
|
}
|
133
|
|
134
|
/**
|
135
|
* Gets the settings array for this and all contained chained processors.
|
136
|
*/
|
137
|
public function getChainSettings() {
|
138
|
foreach ($this->unchain() as $name => $processor) {
|
139
|
$settings[$name] = $processor->getSetting();
|
140
|
}
|
141
|
return isset($settings) ? $settings : array();
|
142
|
}
|
143
|
|
144
|
/**
|
145
|
* Returns an array of modules which we depend on.
|
146
|
*/
|
147
|
public function dependencies() {
|
148
|
$used_processor_info = array_intersect_key($this->processors(), $this->unchain());
|
149
|
$modules = array();
|
150
|
foreach ($used_processor_info as $name => $info) {
|
151
|
$modules[] = $info['module'];
|
152
|
}
|
153
|
return array_filter($modules);
|
154
|
}
|
155
|
|
156
|
/**
|
157
|
* @return
|
158
|
* An array of processors keyed by processor name.
|
159
|
*/
|
160
|
protected function unchain() {
|
161
|
$processor = $this;
|
162
|
while ($processor instanceof RulesDataProcessor) {
|
163
|
$processors[get_class($processor)] = $processor;
|
164
|
$processor = $processor->processor;
|
165
|
}
|
166
|
// Note: Don't use the static context to call processors() here as we need a
|
167
|
// late binding to invoke the input evaluators version, if needed.
|
168
|
$return = array();
|
169
|
foreach ($this->processors() as $name => $info) {
|
170
|
if (isset($processors[$info['class']])) {
|
171
|
$return[$name] = $processors[$info['class']];
|
172
|
}
|
173
|
}
|
174
|
return $return;
|
175
|
}
|
176
|
|
177
|
/**
|
178
|
* Gets the settings of this processor.
|
179
|
*/
|
180
|
public function getSetting() {
|
181
|
return $this->setting;
|
182
|
}
|
183
|
|
184
|
/**
|
185
|
* Processes the value. If $this->processor is set, invoke this processor
|
186
|
* first so chaining multiple processors is working.
|
187
|
*
|
188
|
* @param $value
|
189
|
* The value to process.
|
190
|
* @param $info
|
191
|
* Info about the parameter for which we process the value.
|
192
|
* @param $state RulesState
|
193
|
* The rules evaluation state.
|
194
|
* @param $element RulesPlugin
|
195
|
* The element for which we process the value.
|
196
|
* @return
|
197
|
* The processed value.
|
198
|
*/
|
199
|
abstract public function process($value, $info, RulesState $state, RulesPlugin $element);
|
200
|
|
201
|
/**
|
202
|
* Return whether the current user has permission to use the processor.
|
203
|
*/
|
204
|
public static function access() {
|
205
|
return TRUE;
|
206
|
}
|
207
|
|
208
|
/**
|
209
|
* Defines the processor form element.
|
210
|
*
|
211
|
* @param $settings
|
212
|
* The settings of the processor.
|
213
|
* @param $var_info
|
214
|
* An array of info about the available variables.
|
215
|
*
|
216
|
* @return
|
217
|
* A form element structure.
|
218
|
*/
|
219
|
protected static function form($settings, $var_info) {
|
220
|
return array();
|
221
|
}
|
222
|
}
|
223
|
|
224
|
|
225
|
/**
|
226
|
* A base processor for use as input evaluators. Input evaluators are not listed
|
227
|
* in hook_rules_data_processor_info(). Instead they use
|
228
|
* hook_rules_evaluator_info() and get attached to input forms.
|
229
|
*/
|
230
|
abstract class RulesDataInputEvaluator extends RulesDataProcessor {
|
231
|
|
232
|
/**
|
233
|
* Overridden to invoke prepare().
|
234
|
*/
|
235
|
protected function __construct($setting, $param_info, $var_info = array(), $processor = NULL) {
|
236
|
$this->setting = TRUE;
|
237
|
$this->processor = $processor;
|
238
|
$this->prepare($setting, $var_info, $param_info);
|
239
|
}
|
240
|
|
241
|
/**
|
242
|
* Overridden to generate evaluator $options and invoke evaluate().
|
243
|
*/
|
244
|
public function process($value, $info, RulesState $state, RulesPlugin $element, $options = NULL) {
|
245
|
$options = isset($options) ? $options : $this->getEvaluatorOptions($info, $state, $element);
|
246
|
$value = isset($this->processor) ? $this->processor->process($value, $info, $state, $element, $options) : $value;
|
247
|
return $this->evaluate($value, $options, $state);
|
248
|
}
|
249
|
|
250
|
/**
|
251
|
* Generates the evaluator $options.
|
252
|
*/
|
253
|
protected function getEvaluatorOptions($info, $state, $element) {
|
254
|
$cache = rules_get_cache();
|
255
|
$languages = language_list();
|
256
|
$info += array(
|
257
|
'cleaning callback' => isset($cache['data info'][$info['type']]['cleaning callback']) ? $cache['data info'][$info['type']]['cleaning callback'] : FALSE,
|
258
|
'sanitize' => FALSE,
|
259
|
);
|
260
|
$options = array_filter(array(
|
261
|
'language' => $info['#langcode'] != LANGUAGE_NONE && isset($languages[$info['#langcode']]) ? $languages[$info['#langcode']] : NULL,
|
262
|
'callback' => $info['cleaning callback'],
|
263
|
'sanitize' => $info['sanitize'],
|
264
|
));
|
265
|
return $options;
|
266
|
}
|
267
|
|
268
|
/**
|
269
|
* Overriden to prepare input evaluator processors. The setting is expected
|
270
|
* to be the input value to be evaluated later on and is replaced by the
|
271
|
* suiting processor.
|
272
|
*/
|
273
|
public static function prepareSetting(&$setting, $param_info, $var_info = array()) {
|
274
|
$processor = NULL;
|
275
|
foreach (self::evaluators($param_info, FALSE) as $name => $info) {
|
276
|
$object = new $info['class']($setting, $param_info, $var_info, $processor);
|
277
|
$processor = $object->getPreparedValue();
|
278
|
}
|
279
|
$setting = $processor;
|
280
|
}
|
281
|
|
282
|
protected function getPreparedValue() {
|
283
|
return isset($this->setting) ? $this : $this->processor;
|
284
|
}
|
285
|
|
286
|
/**
|
287
|
* Overriden to just attach the help() of evaluators.
|
288
|
*/
|
289
|
public static function attachForm(&$form, $settings, $param_info, $var_info, $access_check = TRUE) {
|
290
|
foreach (self::evaluators($param_info, $access_check) as $name => $info) {
|
291
|
$form['help'][$name] = call_user_func(array($info['class'], 'help'), $var_info, $param_info);
|
292
|
$form['help'][$name]['#weight'] = $info['weight'];
|
293
|
}
|
294
|
}
|
295
|
|
296
|
/**
|
297
|
* Returns all input evaluators that can be applied to the parameters needed
|
298
|
* type.
|
299
|
*/
|
300
|
public static function evaluators($param_info = NULL, $access_check = TRUE) {
|
301
|
return parent::processors($param_info, $access_check, 'evaluator_info');
|
302
|
}
|
303
|
|
304
|
/**
|
305
|
* Overridden to default to our hook, thus being equivalent to
|
306
|
* self::evaluators().
|
307
|
*/
|
308
|
public static function processors($param_info = NULL, $access_check = TRUE, $hook = 'evaluator_info') {
|
309
|
return parent::processors($param_info, $access_check, $hook);
|
310
|
}
|
311
|
|
312
|
/**
|
313
|
* Prepares the evalution, e.g. to determine whether the input evaluator has
|
314
|
* been used. If this evaluator should be skipped just unset $this->setting.
|
315
|
*
|
316
|
* @param $text
|
317
|
* The text to evaluate later on.
|
318
|
* @param $variables
|
319
|
* An array of info about available variables.
|
320
|
* @param $param_info
|
321
|
* (optional) An array of information about the handled parameter value.
|
322
|
* For backward compatibility, this parameter is not required.
|
323
|
*/
|
324
|
abstract public function prepare($text, $variables);
|
325
|
|
326
|
/**
|
327
|
* Apply the input evaluator.
|
328
|
*
|
329
|
* @param $text
|
330
|
* The text to evaluate.
|
331
|
* @param $options
|
332
|
* A keyed array of settings and flags to control the processing.
|
333
|
* Supported options are:
|
334
|
* - language: A language object to be used when processing.
|
335
|
* - callback: A callback function that will be used to post-process
|
336
|
* replacements that might be incorporated, so they can be cleaned in a
|
337
|
* certain way.
|
338
|
* - sanitize: A boolean flag indicating whether incorporated replacements
|
339
|
* should be sanitized.
|
340
|
* @param RulesState
|
341
|
* The rules evaluation state.
|
342
|
*
|
343
|
* @return
|
344
|
* The evaluated text.
|
345
|
*/
|
346
|
abstract public function evaluate($text, $options, RulesState $state);
|
347
|
|
348
|
/**
|
349
|
* Provide some usage help for the evaluator.
|
350
|
*
|
351
|
* @param $variables
|
352
|
* An array of info about available variables.
|
353
|
* @param $param_info
|
354
|
* (optional) An array of information about the handled parameter value.
|
355
|
* For backward compatibility, this parameter is not required.
|
356
|
*
|
357
|
* @return
|
358
|
* A renderable array.
|
359
|
*/
|
360
|
public static function help($variables) {
|
361
|
return array();
|
362
|
}
|
363
|
|
364
|
}
|