1: <?php
  2: /**
  3:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  4:  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
  5:  *
  6:  * Licensed under The MIT License
  7:  * For full copyright and license information, please see the LICENSE.txt
  8:  * Redistributions of files must retain the above copyright notice.
  9:  *
 10:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 11:  * @link          http://cakephp.org CakePHP(tm) Project
 12:  * @package       Cake.View
 13:  * @since         CakePHP(tm) v 0.2.9
 14:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 15:  */
 16: 
 17: App::uses('Router', 'Routing');
 18: App::uses('Hash', 'Utility');
 19: App::uses('Inflector', 'Utility');
 20: 
 21: /**
 22:  * Abstract base class for all other Helpers in CakePHP.
 23:  * Provides common methods and features.
 24:  *
 25:  * @package       Cake.View
 26:  */
 27: class Helper extends Object {
 28: 
 29: /**
 30:  * Settings for this helper.
 31:  *
 32:  * @var array
 33:  */
 34:     public $settings = array();
 35: 
 36: /**
 37:  * List of helpers used by this helper
 38:  *
 39:  * @var array
 40:  */
 41:     public $helpers = array();
 42: 
 43: /**
 44:  * A helper lookup table used to lazy load helper objects.
 45:  *
 46:  * @var array
 47:  */
 48:     protected $_helperMap = array();
 49: 
 50: /**
 51:  * The current theme name if any.
 52:  *
 53:  * @var string
 54:  */
 55:     public $theme = null;
 56: 
 57: /**
 58:  * Request object
 59:  *
 60:  * @var CakeRequest
 61:  */
 62:     public $request = null;
 63: 
 64: /**
 65:  * Plugin path
 66:  *
 67:  * @var string
 68:  */
 69:     public $plugin = null;
 70: 
 71: /**
 72:  * Holds the fields array('field_name' => array('type' => 'string', 'length' => 100),
 73:  * primaryKey and validates array('field_name')
 74:  *
 75:  * @var array
 76:  */
 77:     public $fieldset = array();
 78: 
 79: /**
 80:  * Holds tag templates.
 81:  *
 82:  * @var array
 83:  */
 84:     public $tags = array();
 85: 
 86: /**
 87:  * Holds the content to be cleaned.
 88:  *
 89:  * @var mixed
 90:  */
 91:     protected $_tainted = null;
 92: 
 93: /**
 94:  * Holds the cleaned content.
 95:  *
 96:  * @var mixed
 97:  */
 98:     protected $_cleaned = null;
 99: 
100: /**
101:  * The View instance this helper is attached to
102:  *
103:  * @var View
104:  */
105:     protected $_View;
106: 
107: /**
108:  * A list of strings that should be treated as suffixes, or
109:  * sub inputs for a parent input. This is used for date/time
110:  * inputs primarily.
111:  *
112:  * @var array
113:  */
114:     protected $_fieldSuffixes = array(
115:         'year', 'month', 'day', 'hour', 'min', 'second', 'meridian'
116:     );
117: 
118: /**
119:  * The name of the current model entities are in scope of.
120:  *
121:  * @see Helper::setEntity()
122:  * @var string
123:  */
124:     protected $_modelScope;
125: 
126: /**
127:  * The name of the current model association entities are in scope of.
128:  *
129:  * @see Helper::setEntity()
130:  * @var string
131:  */
132:     protected $_association;
133: 
134: /**
135:  * The dot separated list of elements the current field entity is for.
136:  *
137:  * @see Helper::setEntity()
138:  * @var string
139:  */
140:     protected $_entityPath;
141: 
142: /**
143:  * Minimized attributes
144:  *
145:  * @var array
146:  */
147:     protected $_minimizedAttributes = array(
148:         'compact', 'checked', 'declare', 'readonly', 'disabled', 'selected',
149:         'defer', 'ismap', 'nohref', 'noshade', 'nowrap', 'multiple', 'noresize',
150:         'autoplay', 'controls', 'loop', 'muted', 'required', 'novalidate', 'formnovalidate'
151:     );
152: 
153: /**
154:  * Format to attribute
155:  *
156:  * @var string
157:  */
158:     protected $_attributeFormat = '%s="%s"';
159: 
160: /**
161:  * Format to attribute
162:  *
163:  * @var string
164:  */
165:     protected $_minimizedAttributeFormat = '%s="%s"';
166: 
167: /**
168:  * Default Constructor
169:  *
170:  * @param View $View The View this helper is being attached to.
171:  * @param array $settings Configuration settings for the helper.
172:  */
173:     public function __construct(View $View, $settings = array()) {
174:         $this->_View = $View;
175:         $this->request = $View->request;
176:         if ($settings) {
177:             $this->settings = Hash::merge($this->settings, $settings);
178:         }
179:         if (!empty($this->helpers)) {
180:             $this->_helperMap = ObjectCollection::normalizeObjectArray($this->helpers);
181:         }
182:     }
183: 
184: /**
185:  * Provide non fatal errors on missing method calls.
186:  *
187:  * @param string $method Method to invoke
188:  * @param array $params Array of params for the method.
189:  * @return void
190:  */
191:     public function __call($method, $params) {
192:         trigger_error(__d('cake_dev', 'Method %1$s::%2$s does not exist', get_class($this), $method), E_USER_WARNING);
193:     }
194: 
195: /**
196:  * Lazy loads helpers. Provides access to deprecated request properties as well.
197:  *
198:  * @param string $name Name of the property being accessed.
199:  * @return mixed Helper or property found at $name
200:  * @deprecated 3.0.0 Accessing request properties through this method is deprecated and will be removed in 3.0.
201:  */
202:     public function __get($name) {
203:         if (isset($this->_helperMap[$name]) && !isset($this->{$name})) {
204:             $settings = array('enabled' => false) + (array)$this->_helperMap[$name]['settings'];
205:             $this->{$name} = $this->_View->loadHelper($this->_helperMap[$name]['class'], $settings);
206:         }
207:         if (isset($this->{$name})) {
208:             return $this->{$name};
209:         }
210:         switch ($name) {
211:             case 'base':
212:             case 'here':
213:             case 'webroot':
214:             case 'data':
215:                 return $this->request->{$name};
216:             case 'action':
217:                 return isset($this->request->params['action']) ? $this->request->params['action'] : '';
218:             case 'params':
219:                 return $this->request;
220:         }
221:     }
222: 
223: /**
224:  * Provides backwards compatibility access for setting values to the request object.
225:  *
226:  * @param string $name Name of the property being accessed.
227:  * @param mixed $value Value to set.
228:  * @return void
229:  * @deprecated 3.0.0 This method will be removed in 3.0
230:  */
231:     public function __set($name, $value) {
232:         switch ($name) {
233:             case 'base':
234:             case 'here':
235:             case 'webroot':
236:             case 'data':
237:                 $this->request->{$name} = $value;
238:                 return;
239:             case 'action':
240:                 $this->request->params['action'] = $value;
241:                 return;
242:         }
243:         $this->{$name} = $value;
244:     }
245: 
246: /**
247:  * Finds URL for specified action.
248:  *
249:  * Returns a URL pointing at the provided parameters.
250:  *
251:  * @param string|array $url Either a relative string url like `/products/view/23` or
252:  *    an array of URL parameters. Using an array for URLs will allow you to leverage
253:  *    the reverse routing features of CakePHP.
254:  * @param bool $full If true, the full base URL will be prepended to the result
255:  * @return string Full translated URL with base path.
256:  * @link http://book.cakephp.org/2.0/en/views/helpers.html
257:  */
258:     public function url($url = null, $full = false) {
259:         return h(Router::url($url, $full));
260:     }
261: 
262: /**
263:  * Checks if a file exists when theme is used, if no file is found default location is returned
264:  *
265:  * @param string $file The file to create a webroot path to.
266:  * @return string Web accessible path to file.
267:  */
268:     public function webroot($file) {
269:         $asset = explode('?', $file);
270:         $asset[1] = isset($asset[1]) ? '?' . $asset[1] : null;
271:         $webPath = "{$this->request->webroot}" . $asset[0];
272:         $file = $asset[0];
273: 
274:         if (!empty($this->theme)) {
275:             $file = trim($file, '/');
276:             $theme = $this->theme . '/';
277: 
278:             if (DS === '\\') {
279:                 $file = str_replace('/', '\\', $file);
280:             }
281: 
282:             if (file_exists(Configure::read('App.www_root') . 'theme' . DS . $this->theme . DS . $file)) {
283:                 $webPath = "{$this->request->webroot}theme/" . $theme . $asset[0];
284:             } else {
285:                 $themePath = App::themePath($this->theme);
286:                 $path = $themePath . 'webroot' . DS . $file;
287:                 if (file_exists($path)) {
288:                     $webPath = "{$this->request->webroot}theme/" . $theme . $asset[0];
289:                 }
290:             }
291:         }
292:         if (strpos($webPath, '//') !== false) {
293:             return str_replace('//', '/', $webPath . $asset[1]);
294:         }
295:         return $webPath . $asset[1];
296:     }
297: 
298: /**
299:  * Generate URL for given asset file. Depending on options passed provides full URL with domain name.
300:  * Also calls Helper::assetTimestamp() to add timestamp to local files
301:  *
302:  * @param string|array $path Path string or URL array
303:  * @param array $options Options array. Possible keys:
304:  *   `fullBase` Return full URL with domain name
305:  *   `pathPrefix` Path prefix for relative URLs
306:  *   `ext` Asset extension to append
307:  *   `plugin` False value will prevent parsing path as a plugin
308:  * @return string Generated URL
309:  */
310:     public function assetUrl($path, $options = array()) {
311:         if (is_array($path)) {
312:             return $this->url($path, !empty($options['fullBase']));
313:         }
314:         if (strpos($path, '://') !== false) {
315:             return $path;
316:         }
317:         if (!array_key_exists('plugin', $options) || $options['plugin'] !== false) {
318:             list($plugin, $path) = $this->_View->pluginSplit($path, false);
319:         }
320:         if (!empty($options['pathPrefix']) && $path[0] !== '/') {
321:             $path = $options['pathPrefix'] . $path;
322:         }
323:         if (!empty($options['ext']) &&
324:             strpos($path, '?') === false &&
325:             substr($path, -strlen($options['ext'])) !== $options['ext']
326:         ) {
327:             $path .= $options['ext'];
328:         }
329:         if (preg_match('|^([a-z0-9]+:)?//|', $path)) {
330:             return $path;
331:         }
332:         if (isset($plugin)) {
333:             $path = Inflector::underscore($plugin) . '/' . $path;
334:         }
335:         $path = $this->_encodeUrl($this->assetTimestamp($this->webroot($path)));
336: 
337:         if (!empty($options['fullBase'])) {
338:             $path = rtrim(Router::fullBaseUrl(), '/') . '/' . ltrim($path, '/');
339:         }
340:         return $path;
341:     }
342: 
343: /**
344:  * Encodes a URL for use in HTML attributes.
345:  *
346:  * @param string $url The URL to encode.
347:  * @return string The URL encoded for both URL & HTML contexts.
348:  */
349:     protected function _encodeUrl($url) {
350:         $path = parse_url($url, PHP_URL_PATH);
351:         $parts = array_map('rawurldecode', explode('/', $path));
352:         $parts = array_map('rawurlencode', $parts);
353:         $encoded = implode('/', $parts);
354:         return h(str_replace($path, $encoded, $url));
355:     }
356: 
357: /**
358:  * Adds a timestamp to a file based resource based on the value of `Asset.timestamp` in
359:  * Configure. If Asset.timestamp is true and debug > 0, or Asset.timestamp === 'force'
360:  * a timestamp will be added.
361:  *
362:  * @param string $path The file path to timestamp, the path must be inside WWW_ROOT
363:  * @return string Path with a timestamp added, or not.
364:  */
365:     public function assetTimestamp($path) {
366:         $stamp = Configure::read('Asset.timestamp');
367:         $timestampEnabled = $stamp === 'force' || ($stamp === true && Configure::read('debug') > 0);
368:         if ($timestampEnabled && strpos($path, '?') === false) {
369:             $filepath = preg_replace(
370:                 '/^' . preg_quote($this->request->webroot, '/') . '/',
371:                 '',
372:                 urldecode($path)
373:             );
374:             $webrootPath = WWW_ROOT . str_replace('/', DS, $filepath);
375:             if (file_exists($webrootPath)) {
376:                 //@codingStandardsIgnoreStart
377:                 return $path . '?' . @filemtime($webrootPath);
378:                 //@codingStandardsIgnoreEnd
379:             }
380:             $segments = explode('/', ltrim($filepath, '/'));
381:             if ($segments[0] === 'theme') {
382:                 $theme = $segments[1];
383:                 unset($segments[0], $segments[1]);
384:                 $themePath = App::themePath($theme) . 'webroot' . DS . implode(DS, $segments);
385:                 //@codingStandardsIgnoreStart
386:                 return $path . '?' . @filemtime($themePath);
387:                 //@codingStandardsIgnoreEnd
388:             } else {
389:                 $plugin = Inflector::camelize($segments[0]);
390:                 if (CakePlugin::loaded($plugin)) {
391:                     unset($segments[0]);
392:                     $pluginPath = CakePlugin::path($plugin) . 'webroot' . DS . implode(DS, $segments);
393:                     //@codingStandardsIgnoreStart
394:                     return $path . '?' . @filemtime($pluginPath);
395:                     //@codingStandardsIgnoreEnd
396:                 }
397:             }
398:         }
399:         return $path;
400:     }
401: 
402: /**
403:  * Used to remove harmful tags from content. Removes a number of well known XSS attacks
404:  * from content. However, is not guaranteed to remove all possibilities. Escaping
405:  * content is the best way to prevent all possible attacks.
406:  *
407:  * @param string|array $output Either an array of strings to clean or a single string to clean.
408:  * @return string|array|null Cleaned content for output
409:  * @deprecated 3.0.0 This method will be removed in 3.0
410:  */
411:     public function clean($output) {
412:         $this->_reset();
413:         if (empty($output)) {
414:             return null;
415:         }
416:         if (is_array($output)) {
417:             foreach ($output as $key => $value) {
418:                 $return[$key] = $this->clean($value);
419:             }
420:             return $return;
421:         }
422:         $this->_tainted = $output;
423:         $this->_clean();
424:         return $this->_cleaned;
425:     }
426: 
427: /**
428:  * Returns a space-delimited string with items of the $options array. If a key
429:  * of $options array happens to be one of those listed in `Helper::$_minimizedAttributes`
430:  *
431:  * And its value is one of:
432:  *
433:  * - '1' (string)
434:  * - 1 (integer)
435:  * - true (boolean)
436:  * - 'true' (string)
437:  *
438:  * Then the value will be reset to be identical with key's name.
439:  * If the value is not one of these 3, the parameter is not output.
440:  *
441:  * 'escape' is a special option in that it controls the conversion of
442:  *  attributes to their html-entity encoded equivalents. Set to false to disable html-encoding.
443:  *
444:  * If value for any option key is set to `null` or `false`, that option will be excluded from output.
445:  *
446:  * @param array $options Array of options.
447:  * @param array $exclude Array of options to be excluded, the options here will not be part of the return.
448:  * @param string $insertBefore String to be inserted before options.
449:  * @param string $insertAfter String to be inserted after options.
450:  * @return string Composed attributes.
451:  * @deprecated 3.0.0 This method will be moved to HtmlHelper in 3.0
452:  */
453:     protected function _parseAttributes($options, $exclude = null, $insertBefore = ' ', $insertAfter = null) {
454:         if (!is_string($options)) {
455:             $options = (array)$options + array('escape' => true);
456: 
457:             if (!is_array($exclude)) {
458:                 $exclude = array();
459:             }
460: 
461:             $exclude = array('escape' => true) + array_flip($exclude);
462:             $escape = $options['escape'];
463:             $attributes = array();
464: 
465:             foreach ($options as $key => $value) {
466:                 if (!isset($exclude[$key]) && $value !== false && $value !== null) {
467:                     $attributes[] = $this->_formatAttribute($key, $value, $escape);
468:                 }
469:             }
470:             $out = implode(' ', $attributes);
471:         } else {
472:             $out = $options;
473:         }
474:         return $out ? $insertBefore . $out . $insertAfter : '';
475:     }
476: 
477: /**
478:  * Formats an individual attribute, and returns the string value of the composed attribute.
479:  * Works with minimized attributes that have the same value as their name such as 'disabled' and 'checked'
480:  *
481:  * @param string $key The name of the attribute to create
482:  * @param string $value The value of the attribute to create.
483:  * @param bool $escape Define if the value must be escaped
484:  * @return string The composed attribute.
485:  * @deprecated 3.0.0 This method will be moved to HtmlHelper in 3.0
486:  */
487:     protected function _formatAttribute($key, $value, $escape = true) {
488:         if (is_array($value)) {
489:             $value = implode(' ', $value);
490:         }
491:         if (is_numeric($key)) {
492:             return sprintf($this->_minimizedAttributeFormat, $value, $value);
493:         }
494:         $truthy = array(1, '1', true, 'true', $key);
495:         $isMinimized = in_array($key, $this->_minimizedAttributes);
496:         if ($isMinimized && in_array($value, $truthy, true)) {
497:             return sprintf($this->_minimizedAttributeFormat, $key, $key);
498:         }
499:         if ($isMinimized) {
500:             return '';
501:         }
502:         return sprintf($this->_attributeFormat, $key, ($escape ? h($value) : $value));
503:     }
504: 
505: /**
506:  * Returns a string to be used as onclick handler for confirm dialogs.
507:  *
508:  * @param string $message Message to be displayed
509:  * @param string $okCode Code to be executed after user chose 'OK'
510:  * @param string $cancelCode Code to be executed after user chose 'Cancel'
511:  * @param array $options Array of options
512:  * @return string onclick JS code
513:  */
514:     protected function _confirm($message, $okCode, $cancelCode = '', $options = array()) {
515:         $message = json_encode($message);
516:         $confirm = "if (confirm({$message})) { {$okCode} } {$cancelCode}";
517:         if (isset($options['escape']) && $options['escape'] === false) {
518:             $confirm = h($confirm);
519:         }
520:         return $confirm;
521:     }
522: 
523: /**
524:  * Sets this helper's model and field properties to the dot-separated value-pair in $entity.
525:  *
526:  * @param string $entity A field name, like "ModelName.fieldName" or "ModelName.ID.fieldName"
527:  * @param bool $setScope Sets the view scope to the model specified in $tagValue
528:  * @return void
529:  */
530:     public function setEntity($entity, $setScope = false) {
531:         if ($entity === null) {
532:             $this->_modelScope = false;
533:         }
534:         if ($setScope === true) {
535:             $this->_modelScope = $entity;
536:         }
537:         $parts = array_values(Hash::filter(explode('.', $entity)));
538:         if (empty($parts)) {
539:             return;
540:         }
541:         $count = count($parts);
542:         $lastPart = isset($parts[$count - 1]) ? $parts[$count - 1] : null;
543: 
544:         // Either 'body' or 'date.month' type inputs.
545:         if (($count === 1 && $this->_modelScope && !$setScope) ||
546:             (
547:                 $count === 2 &&
548:                 in_array($lastPart, $this->_fieldSuffixes) &&
549:                 $this->_modelScope &&
550:                 $parts[0] !== $this->_modelScope
551:             )
552:         ) {
553:             $entity = $this->_modelScope . '.' . $entity;
554:         }
555: 
556:         // 0.name, 0.created.month style inputs. Excludes inputs with the modelScope in them.
557:         if ($count >= 2 &&
558:             is_numeric($parts[0]) &&
559:             !is_numeric($parts[1]) &&
560:             $this->_modelScope &&
561:             strpos($entity, $this->_modelScope) === false
562:         ) {
563:             $entity = $this->_modelScope . '.' . $entity;
564:         }
565: 
566:         $this->_association = null;
567: 
568:         $isHabtm = (
569:             isset($this->fieldset[$this->_modelScope]['fields'][$parts[0]]['type']) &&
570:             $this->fieldset[$this->_modelScope]['fields'][$parts[0]]['type'] === 'multiple'
571:         );
572: 
573:         // habtm models are special
574:         if ($count === 1 && $isHabtm) {
575:             $this->_association = $parts[0];
576:             $entity = $parts[0] . '.' . $parts[0];
577:         } else {
578:             // check for associated model.
579:             $reversed = array_reverse($parts);
580:             foreach ($reversed as $i => $part) {
581:                 if ($i > 0 && preg_match('/^[A-Z]/', $part)) {
582:                     $this->_association = $part;
583:                     break;
584:                 }
585:             }
586:         }
587:         $this->_entityPath = $entity;
588:     }
589: 
590: /**
591:  * Returns the entity reference of the current context as an array of identity parts
592:  *
593:  * @return array An array containing the identity elements of an entity
594:  */
595:     public function entity() {
596:         return explode('.', $this->_entityPath);
597:     }
598: 
599: /**
600:  * Gets the currently-used model of the rendering context.
601:  *
602:  * @return string
603:  */
604:     public function model() {
605:         if ($this->_association) {
606:             return $this->_association;
607:         }
608:         return $this->_modelScope;
609:     }
610: 
611: /**
612:  * Gets the currently-used model field of the rendering context.
613:  * Strips off field suffixes such as year, month, day, hour, min, meridian
614:  * when the current entity is longer than 2 elements.
615:  *
616:  * @return string
617:  */
618:     public function field() {
619:         $entity = $this->entity();
620:         $count = count($entity);
621:         $last = $entity[$count - 1];
622:         if ($count > 2 && in_array($last, $this->_fieldSuffixes)) {
623:             $last = isset($entity[$count - 2]) ? $entity[$count - 2] : null;
624:         }
625:         return $last;
626:     }
627: 
628: /**
629:  * Generates a DOM ID for the selected element, if one is not set.
630:  * Uses the current View::entity() settings to generate a CamelCased id attribute.
631:  *
632:  * @param array|string $options Either an array of html attributes to add $id into, or a string
633:  *   with a view entity path to get a domId for.
634:  * @param string $id The name of the 'id' attribute.
635:  * @return mixed If $options was an array, an array will be returned with $id set. If a string
636:  *   was supplied, a string will be returned.
637:  */
638:     public function domId($options = null, $id = 'id') {
639:         if (is_array($options) && array_key_exists($id, $options) && $options[$id] === null) {
640:             unset($options[$id]);
641:             return $options;
642:         } elseif (!is_array($options) && $options !== null) {
643:             $this->setEntity($options);
644:             return $this->domId();
645:         }
646: 
647:         $entity = $this->entity();
648:         $model = array_shift($entity);
649:         $dom = $model . implode('', array_map(array('Inflector', 'camelize'), $entity));
650: 
651:         if (is_array($options) && !array_key_exists($id, $options)) {
652:             $options[$id] = $dom;
653:         } elseif ($options === null) {
654:             return $dom;
655:         }
656:         return $options;
657:     }
658: 
659: /**
660:  * Gets the input field name for the current tag. Creates input name attributes
661:  * using CakePHP's data[Model][field] formatting.
662:  *
663:  * @param array|string $options If an array, should be an array of attributes that $key needs to be added to.
664:  *   If a string or null, will be used as the View entity.
665:  * @param string $field Field name.
666:  * @param string $key The name of the attribute to be set, defaults to 'name'
667:  * @return mixed If an array was given for $options, an array with $key set will be returned.
668:  *   If a string was supplied a string will be returned.
669:  */
670:     protected function _name($options = array(), $field = null, $key = 'name') {
671:         if ($options === null) {
672:             $options = array();
673:         } elseif (is_string($options)) {
674:             $field = $options;
675:             $options = 0;
676:         }
677: 
678:         if (!empty($field)) {
679:             $this->setEntity($field);
680:         }
681: 
682:         if (is_array($options) && array_key_exists($key, $options)) {
683:             return $options;
684:         }
685: 
686:         switch ($field) {
687:             case '_method':
688:                 $name = $field;
689:                 break;
690:             default:
691:                 $name = 'data[' . implode('][', $this->entity()) . ']';
692:         }
693: 
694:         if (is_array($options)) {
695:             $options[$key] = $name;
696:             return $options;
697:         }
698:         return $name;
699:     }
700: 
701: /**
702:  * Gets the data for the current tag
703:  *
704:  * @param array|string $options If an array, should be an array of attributes that $key needs to be added to.
705:  *   If a string or null, will be used as the View entity.
706:  * @param string $field Field name.
707:  * @param string $key The name of the attribute to be set, defaults to 'value'
708:  * @return mixed If an array was given for $options, an array with $key set will be returned.
709:  *   If a string was supplied a string will be returned.
710:  */
711:     public function value($options = array(), $field = null, $key = 'value') {
712:         if ($options === null) {
713:             $options = array();
714:         } elseif (is_string($options)) {
715:             $field = $options;
716:             $options = 0;
717:         }
718: 
719:         if (is_array($options) && isset($options[$key])) {
720:             return $options;
721:         }
722: 
723:         if (!empty($field)) {
724:             $this->setEntity($field);
725:         }
726:         $result = null;
727:         $data = $this->request->data;
728: 
729:         $entity = $this->entity();
730:         if (!empty($data) && is_array($data) && !empty($entity)) {
731:             $result = Hash::get($data, implode('.', $entity));
732:         }
733: 
734:         $habtmKey = $this->field();
735:         if (empty($result) && isset($data[$habtmKey][$habtmKey]) && is_array($data[$habtmKey])) {
736:             $result = $data[$habtmKey][$habtmKey];
737:         } elseif (empty($result) && isset($data[$habtmKey]) && is_array($data[$habtmKey])) {
738:             if (ClassRegistry::isKeySet($habtmKey)) {
739:                 $model = ClassRegistry::getObject($habtmKey);
740:                 $result = $this->_selectedArray($data[$habtmKey], $model->primaryKey);
741:             }
742:         }
743: 
744:         if (is_array($options)) {
745:             if ($result === null && isset($options['default'])) {
746:                 $result = $options['default'];
747:             }
748:             unset($options['default']);
749:         }
750: 
751:         if (is_array($options)) {
752:             $options[$key] = $result;
753:             return $options;
754:         }
755:         return $result;
756:     }
757: 
758: /**
759:  * Sets the defaults for an input tag. Will set the
760:  * name, value, and id attributes for an array of html attributes.
761:  *
762:  * @param string $field The field name to initialize.
763:  * @param array $options Array of options to use while initializing an input field.
764:  * @return array Array options for the form input.
765:  */
766:     protected function _initInputField($field, $options = array()) {
767:         if ($field !== null) {
768:             $this->setEntity($field);
769:         }
770:         $options = (array)$options;
771:         $options = $this->_name($options);
772:         $options = $this->value($options);
773:         $options = $this->domId($options);
774:         return $options;
775:     }
776: 
777: /**
778:  * Adds the given class to the element options
779:  *
780:  * @param array $options Array options/attributes to add a class to
781:  * @param string $class The class name being added.
782:  * @param string $key the key to use for class.
783:  * @return array Array of options with $key set.
784:  */
785:     public function addClass($options = array(), $class = null, $key = 'class') {
786:         if (isset($options[$key]) && trim($options[$key])) {
787:             $options[$key] .= ' ' . $class;
788:         } else {
789:             $options[$key] = $class;
790:         }
791:         return $options;
792:     }
793: 
794: /**
795:  * Returns a string generated by a helper method
796:  *
797:  * This method can be overridden in subclasses to do generalized output post-processing
798:  *
799:  * @param string $str String to be output.
800:  * @return string
801:  * @deprecated 3.0.0 This method will be removed in future versions.
802:  */
803:     public function output($str) {
804:         return $str;
805:     }
806: 
807: /**
808:  * Before render callback. beforeRender is called before the view file is rendered.
809:  *
810:  * Overridden in subclasses.
811:  *
812:  * @param string $viewFile The view file that is going to be rendered
813:  * @return void
814:  */
815:     public function beforeRender($viewFile) {
816:     }
817: 
818: /**
819:  * After render callback. afterRender is called after the view file is rendered
820:  * but before the layout has been rendered.
821:  *
822:  * Overridden in subclasses.
823:  *
824:  * @param string $viewFile The view file that was rendered.
825:  * @return void
826:  */
827:     public function afterRender($viewFile) {
828:     }
829: 
830: /**
831:  * Before layout callback. beforeLayout is called before the layout is rendered.
832:  *
833:  * Overridden in subclasses.
834:  *
835:  * @param string $layoutFile The layout about to be rendered.
836:  * @return void
837:  */
838:     public function beforeLayout($layoutFile) {
839:     }
840: 
841: /**
842:  * After layout callback. afterLayout is called after the layout has rendered.
843:  *
844:  * Overridden in subclasses.
845:  *
846:  * @param string $layoutFile The layout file that was rendered.
847:  * @return void
848:  */
849:     public function afterLayout($layoutFile) {
850:     }
851: 
852: /**
853:  * Before render file callback.
854:  * Called before any view fragment is rendered.
855:  *
856:  * Overridden in subclasses.
857:  *
858:  * @param string $viewFile The file about to be rendered.
859:  * @return void
860:  */
861:     public function beforeRenderFile($viewFile) {
862:     }
863: 
864: /**
865:  * After render file callback.
866:  * Called after any view fragment is rendered.
867:  *
868:  * Overridden in subclasses.
869:  *
870:  * @param string $viewFile The file just be rendered.
871:  * @param string $content The content that was rendered.
872:  * @return void
873:  */
874:     public function afterRenderFile($viewFile, $content) {
875:     }
876: 
877: /**
878:  * Transforms a recordset from a hasAndBelongsToMany association to a list of selected
879:  * options for a multiple select element
880:  *
881:  * @param string|array $data Data array or model name.
882:  * @param string $key Field name.
883:  * @return array
884:  */
885:     protected function _selectedArray($data, $key = 'id') {
886:         if (!is_array($data)) {
887:             $model = $data;
888:             if (!empty($this->request->data[$model][$model])) {
889:                 return $this->request->data[$model][$model];
890:             }
891:             if (!empty($this->request->data[$model])) {
892:                 $data = $this->request->data[$model];
893:             }
894:         }
895:         $array = array();
896:         if (!empty($data)) {
897:             foreach ($data as $row) {
898:                 if (isset($row[$key])) {
899:                     $array[$row[$key]] = $row[$key];
900:                 }
901:             }
902:         }
903:         return empty($array) ? null : $array;
904:     }
905: 
906: /**
907:  * Resets the vars used by Helper::clean() to null
908:  *
909:  * @return void
910:  */
911:     protected function _reset() {
912:         $this->_tainted = null;
913:         $this->_cleaned = null;
914:     }
915: 
916: /**
917:  * Removes harmful content from output
918:  *
919:  * @return void
920:  */
921:     protected function _clean() {
922:         if (get_magic_quotes_gpc()) {
923:             $this->_cleaned = stripslashes($this->_tainted);
924:         } else {
925:             $this->_cleaned = $this->_tainted;
926:         }
927: 
928:         $this->_cleaned = str_replace(array("&amp;", "&lt;", "&gt;"), array("&amp;amp;", "&amp;lt;", "&amp;gt;"), $this->_cleaned);
929:         $this->_cleaned = preg_replace('#(&\#*\w+)[\x00-\x20]+;#u', "$1;", $this->_cleaned);
930:         $this->_cleaned = preg_replace('#(&\#x*)([0-9A-F]+);*#iu', "$1$2;", $this->_cleaned);
931:         $this->_cleaned = html_entity_decode($this->_cleaned, ENT_COMPAT, "UTF-8");
932:         $this->_cleaned = preg_replace('#(<[^>]+[\x00-\x20\"\'\/])(on|xmlns)[^>]*>#iUu', "$1>", $this->_cleaned);
933:         $this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*)[\\x00-\x20]*j[\x00-\x20]*a[\x00-\x20]*v[\x00-\x20]*a[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu', '$1=$2nojavascript...', $this->_cleaned);
934:         $this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*v[\x00-\x20]*b[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu', '$1=$2novbscript...', $this->_cleaned);
935:         $this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=*([\'\"]*)[\x00-\x20]*-moz-binding[\x00-\x20]*:#iUu', '$1=$2nomozbinding...', $this->_cleaned);
936:         $this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*data[\x00-\x20]*:#Uu', '$1=$2nodata...', $this->_cleaned);
937:         $this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*expression[\x00-\x20]*\([^>]*>#iU', "$1>", $this->_cleaned);
938:         $this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*behaviour[\x00-\x20]*\([^>]*>#iU', "$1>", $this->_cleaned);
939:         $this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:*[^>]*>#iUu', "$1>", $this->_cleaned);
940:         $this->_cleaned = preg_replace('#</*\w+:\w[^>]*>#i', "", $this->_cleaned);
941:         do {
942:             $oldstring = $this->_cleaned;
943:             $this->_cleaned = preg_replace('#</*(applet|meta|xml|blink|link|style|script|embed|object|iframe|frame|frameset|ilayer|layer|bgsound|title|base)[^>]*>#i', "", $this->_cleaned);
944:         } while ($oldstring !== $this->_cleaned);
945:         $this->_cleaned = str_replace(array("&amp;", "&lt;", "&gt;"), array("&amp;amp;", "&amp;lt;", "&amp;gt;"), $this->_cleaned);
946:     }
947: 
948: }
949: