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<?php
2
/* SVN FILE: $Id: router.php 8004 2009-01-16 20:15:21Z gwoo $ */
3
/**
4
 * Parses the request URL into controller, action, and parameters.
5
 *
6
 * Long description for file
7
 *
8
 * PHP versions 4 and 5
9
 *
10
 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)
11
 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
12
 *
13
 * Licensed under The MIT License
14
 * Redistributions of files must retain the above copyright notice.
15
 *
16
 * @filesource
17
 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
18
 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
19
 * @package       cake
20
 * @subpackage    cake.cake.libs
21
 * @since         CakePHP(tm) v 0.2.9
22
 * @version       $Revision: 8004 $
23
 * @modifiedby    $LastChangedBy: gwoo $
24
 * @lastmodified  $Date: 2009-01-16 12:15:21 -0800 (Fri, 16 Jan 2009) $
25
 * @license       http://www.opensource.org/licenses/mit-license.php The MIT License
26
 */
27
/**
28
 * Included libraries.
29
 *
30
 */
31
if (!class_exists('Object')) {
32
	App::import('Core', 'Object');
33
}
34
/**
35
 * Parses the request URL into controller, action, and parameters.
36
 *
37
 * @package       cake
38
 * @subpackage    cake.cake.libs
39
 */
40
class Router extends Object {
41
/**
42
 * Array of routes
43
 *
44
 * @var array
45
 * @access public
46
 */
47
	var $routes = array();
48
/**
49
 * Caches admin setting from Configure class
50
 *
51
 * @var array
52
 * @access private
53
 */
54
	var $__admin = null;
55
/**
56
 * List of action prefixes used in connected routes
57
 *
58
 * @var array
59
 * @access private
60
 */
61
	var $__prefixes = array();
62
/**
63
 * Directive for Router to parse out file extensions for mapping to Content-types.
64
 *
65
 * @var boolean
66
 * @access private
67
 */
68
	var $__parseExtensions = false;
69
/**
70
 * List of valid extensions to parse from a URL.  If null, any extension is allowed.
71
 *
72
 * @var array
73
 * @access private
74
 */
75
	var $__validExtensions = null;
76
/**
77
 * 'Constant' regular expression definitions for named route elements
78
 *
79
 * @var array
80
 * @access private
81
 */
82
	var $__named = array(
83
		'Action'	=> 'index|show|add|create|edit|update|remove|del|delete|view|item',
84
		'Year'		=> '[12][0-9]{3}',
85
		'Month'		=> '0[1-9]|1[012]',
86
		'Day'		=> '0[1-9]|[12][0-9]|3[01]',
87
		'ID'		=> '[0-9]+',
88
		'UUID'		=> '[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}'
89
	);
90
/**
91
 * Stores all information necessary to decide what named arguments are parsed under what conditions.
92
 *
93
 * @var string
94
 * @access public
95
 */
96
	var $named = array(
97
		'default' => array('page', 'fields', 'order', 'limit', 'recursive', 'sort', 'direction', 'step'),
98
		'greedy' => true,
99
		'separator' => ':',
100
		'rules' => false,
101
	);
102
/**
103
 * The route matching the URL of the current request
104
 *
105
 * @var array
106
 * @access private
107
 */
108
	var $__currentRoute = array();
109
/**
110
 * HTTP header shortcut map.  Used for evaluating header-based route expressions.
111
 *
112
 * @var array
113
 * @access private
114
 */
115
	var $__headerMap = array(
116
		'type'		=> 'content_type',
117
		'method'	=> 'request_method',
118
		'server'	=> 'server_name'
119
	);
120
/**
121
 * Default HTTP request method => controller action map.
122
 *
123
 * @var array
124
 * @access private
125
 */
126
	var $__resourceMap = array(
127
		array('action' => 'index',	'method' => 'GET',		'id' => false),
128
		array('action' => 'view',	'method' => 'GET',		'id' => true),
129
		array('action' => 'add',	'method' => 'POST',		'id' => false),
130
		array('action' => 'edit',	'method' => 'PUT', 		'id' => true),
131
		array('action' => 'delete',	'method' => 'DELETE',	'id' => true),
132
		array('action' => 'edit',	'method' => 'POST', 	'id' => true)
133
	);
134
/**
135
 * List of resource-mapped controllers
136
 *
137
 * @var array
138
 * @access private
139
 */
140
	var $__resourceMapped = array();
141
/**
142
 * Maintains the parameter stack for the current request
143
 *
144
 * @var array
145
 * @access private
146
 */
147
	var $__params = array();
148
/**
149
 * Maintains the path stack for the current request
150
 *
151
 * @var array
152
 * @access private
153
 */
154
	var $__paths = array();
155
/**
156
 * Keeps Router state to determine if default routes have already been connected
157
 *
158
 * @var boolean
159
 * @access private
160
 */
161
	var $__defaultsMapped = false;
162
/**
163
 * Gets a reference to the Router object instance
164
 *
165
 * @return object Object instance
166
 * @access public
167
 * @static
168
 */
169
	function &getInstance() {
170
		static $instance = array();
171
 
172
		if (!$instance) {
173
			$instance[0] =& new Router();
174
			$instance[0]->__admin = Configure::read('Routing.admin');
175
		}
176
		return $instance[0];
177
	}
178
/**
179
 * Gets the named route elements for use in app/config/routes.php
180
 *
181
 * @return array Named route elements
182
 * @access public
183
 * @see Router::$__named
184
 * @static
185
 */
186
	function getNamedExpressions() {
187
		$_this =& Router::getInstance();
188
		return $_this->__named;
189
	}
190
/**
191
 * Returns this object's routes array. Returns false if there are no routes available.
192
 *
193
 * @param string $route			An empty string, or a route string "/"
194
 * @param array $default		NULL or an array describing the default route
195
 * @param array $params			An array matching the named elements in the route to regular expressions which that element should match.
196
 * @see routes
197
 * @return array			Array of routes
198
 * @access public
199
 * @static
200
 */
201
	function connect($route, $default = array(), $params = array()) {
202
		$_this =& Router::getInstance();
203
 
204
		if (!isset($default['action'])) {
205
			$default['action'] = 'index';
206
		}
207
		if (isset($default[$_this->__admin])) {
208
			$default['prefix'] = $_this->__admin;
209
		}
210
		if (isset($default['prefix'])) {
211
			$_this->__prefixes[] = $default['prefix'];
212
			$_this->__prefixes = array_keys(array_flip($_this->__prefixes));
213
		}
214
		$_this->routes[] = array($route, $default, $params);
215
		return $_this->routes;
216
	}
217
/**
218
 *Specifies what named parameters CakePHP should be parsing. The most common setups are:
219
 *
220
 * Do not parse any named parameters:
221
 * 	Router::connectNamed(false);
222
 *
223
 * Parse only default parameters used for CakePHP's pagination:
224
 * 	Router::connectNamed(false, array('default' => true));
225
 *
226
 * Parse only the page parameter if its value is a number:
227
 * 	Router::connectNamed(array('page' => '[\d]+'), array('default' => false, 'greedy' => false));
228
 *
229
 * Parse only the page parameter no mater what.
230
 * 	Router::connectNamed(array('page'), array('default' => false, 'greedy' => false));
231
 *
232
 * Parse only the page parameter if the current action is 'index'.
233
 * 	Router::connectNamed(array('page' => array('action' => 'index')), array('default' => false, 'greedy' => false));
234
 *
235
 * Parse only the page parameter if the current action is 'index' and the controller is 'pages'.
236
 * 	Router::connectNamed(array('page' => array('action' => 'index', 'controller' => 'pages')), array('default' => false, 'greedy' => false));
237
 *
238
 * @param array $named A list of named parameters. Key value pairs are accepted where values are either regex strings to match, or arrays as seen above.
239
 * @param array $options Allows to control all settings: separator, greedy, reset, default
240
 * @return array
241
 * @access public
242
 * @static
243
 */
244
	function connectNamed($named, $options = array()) {
245
		$_this =& Router::getInstance();
246
 
247
		if (isset($options['argSeparator'])) {
248
			$_this->named['separator'] = $options['argSeparator'];
249
			unset($options['argSeparator']);
250
		}
251
 
252
		if ($named === true || $named === false) {
253
			$options = array_merge(array('default' => $named, 'reset' => true, 'greedy' => $named), $options);
254
			$named = array();
255
		}
256
		$options = array_merge(array('default' => false, 'reset' => false, 'greedy' => true), $options);
257
 
258
		if ($options['reset'] == true || $_this->named['rules'] === false) {
259
			$_this->named['rules'] = array();
260
		}
261
 
262
		if ($options['default']) {
263
			$named = array_merge($named, $_this->named['default']);
264
		}
265
 
266
		foreach ($named as $key => $val) {
267
			if (is_numeric($key)) {
268
				$_this->named['rules'][$val] = true;
269
			} else {
270
				$_this->named['rules'][$key] = $val;
271
			}
272
		}
273
		$_this->named['greedy'] = $options['greedy'];
274
		return $_this->named;
275
	}
276
/**
277
 * Creates REST resource routes for the given controller(s)
278
 *
279
 * @param mixed $controller		A controller name or array of controller names (i.e. "Posts" or "ListItems")
280
 * @param array $options		Options to use when generating REST routes
281
 *					'id' -		The regular expression fragment to use when matching IDs.  By default, matches
282
 *								integer values and UUIDs.
283
 *					'prefix' -	URL prefix to use for the generated routes.  Defaults to '/'.
284
 * @return void
285
 * @access public
286
 * @static
287
 */
288
	function mapResources($controller, $options = array()) {
289
		$_this =& Router::getInstance();
290
		$options = array_merge(array('prefix' => '/', 'id' => $_this->__named['ID'] . '|' . $_this->__named['UUID']), $options);
291
		$prefix = $options['prefix'];
292
 
293
		foreach ((array)$controller as $ctlName) {
294
			$urlName = Inflector::underscore($ctlName);
295
 
296
			foreach ($_this->__resourceMap as $params) {
297
				extract($params);
298
				$url = $prefix . $urlName . (($id) ? '/:id' : '');
299
 
300
				Router::connect($url,
301
					array('controller' => $urlName, 'action' => $action, '[method]' => $params['method']),
302
					array('id' => $options['id'], 'pass' => array('id'))
303
				);
304
			}
305
			$_this->__resourceMapped[] = $urlName;
306
		}
307
	}
308
/**
309
 * Builds a route regular expression
310
 *
311
 * @param string $route			An empty string, or a route string "/"
312
 * @param array $default		NULL or an array describing the default route
313
 * @param array $params			An array matching the named elements in the route to regular expressions which that element should match.
314
 * @return array
315
 * @see routes
316
 * @access public
317
 * @static
318
 */
319
	function writeRoute($route, $default, $params) {
320
		if (empty($route) || ($route === '/')) {
321
			return array('/^[\/]*$/', array());
322
		}
323
		$names = array();
324
		$elements = explode('/', $route);
325
 
326
		foreach ($elements as $element) {
327
			if (empty($element)) {
328
				continue;
329
			}
330
			$q = null;
331
			$element = trim($element);
332
			$namedParam = strpos($element, ':') !== false;
333
 
334
			if ($namedParam && preg_match('/^:([^:]+)$/', $element, $r)) {
335
				if (isset($params[$r[1]])) {
336
					if ($r[1] != 'plugin' && array_key_exists($r[1], $default)) {
337
						$q = '?';
338
					}
339
					$parsed[] = '(?:/(' . $params[$r[1]] . ')' . $q . ')' . $q;
340
				} else {
341
					$parsed[] = '(?:/([^\/]+))?';
342
				}
343
				$names[] = $r[1];
344
			} elseif ($element === '*') {
345
				$parsed[] = '(?:/(.*))?';
346
			} else if ($namedParam && preg_match_all('/(?!\\\\):([a-z_0-9]+)/i', $element, $matches)) {
347
				$matchCount = count($matches[1]);
348
 
349
				foreach ($matches[1] as $i => $name) {
350
					$pos = strpos($element, ':' . $name);
351
					$before = substr($element, 0, $pos);
352
					$element = substr($element, $pos + strlen($name) + 1);
353
					$after = null;
354
 
355
					if ($i + 1 === $matchCount && $element) {
356
						$after = preg_quote($element);
357
					}
358
 
359
					if ($i === 0) {
360
						$before = '/' . $before;
361
					}
362
					$before = preg_quote($before, '#');
363
 
364
					if (isset($params[$name])) {
365
						if (isset($default[$name]) && $name != 'plugin') {
366
							$q = '?';
367
						}
368
						$parsed[] = '(?:' . $before . '(' . $params[$name] . ')' . $q . $after . ')' . $q;
369
					} else {
370
						$parsed[] = '(?:' . $before . '([^\/]+)' . $after . ')?';
371
					}
372
					$names[] = $name;
373
				}
374
			} else {
375
				$parsed[] = '/' . $element;
376
			}
377
		}
378
		return array('#^' . join('', $parsed) . '[\/]*$#', $names);
379
	}
380
/**
381
 * Returns the list of prefixes used in connected routes
382
 *
383
 * @return array A list of prefixes used in connected routes
384
 * @access public
385
 * @static
386
 */
387
	function prefixes() {
388
		$_this =& Router::getInstance();
389
		return $_this->__prefixes;
390
	}
391
/**
392
 * Parses given URL and returns an array of controllers, action and parameters
393
 * taken from that URL.
394
 *
395
 * @param string $url URL to be parsed
396
 * @return array Parsed elements from URL
397
 * @access public
398
 * @static
399
 */
400
	function parse($url) {
401
		$_this =& Router::getInstance();
402
		if (!$_this->__defaultsMapped) {
403
			$_this->__connectDefaultRoutes();
404
		}
405
		$out = array('pass' => array(), 'named' => array());
406
		$r = $ext = null;
407
 
408
		if (ini_get('magic_quotes_gpc') === '1') {
409
			$url = stripslashes_deep($url);
410
		}
411
 
412
		if ($url && strpos($url, '/') !== 0) {
413
			$url = '/' . $url;
414
		}
415
		if (strpos($url, '?') !== false) {
416
			$url = substr($url, 0, strpos($url, '?'));
417
		}
418
		extract($_this->__parseExtension($url));
419
 
420
		foreach ($_this->routes as $i => $route) {
421
			if (count($route) === 3) {
422
				$route = $_this->compile($i);
423
			}
424
 
425
			if (($r = $_this->__matchRoute($route, $url)) !== false) {
426
				$_this->__currentRoute[] = $route;
427
				list($route, $regexp, $names, $defaults, $params) = $route;
428
				$argOptions = array();
429
 
430
				if (array_key_exists('named', $params)) {
431
					$argOptions['named'] = $params['named'];
432
					unset($params['named']);
433
				}
434
				if (array_key_exists('greedy', $params)) {
435
					$argOptions['greedy'] = $params['greedy'];
436
					unset($params['greedy']);
437
				}
438
				array_shift($r);
439
 
440
				foreach ($names as $name) {
441
					$out[$name] = null;
442
				}
443
				if (is_array($defaults)) {
444
					foreach ($defaults as $name => $value) {
445
						if (preg_match('#[a-zA-Z_\-]#i', $name)) {
446
							$out[$name] = $value;
447
						} else {
448
							$out['pass'][] = $value;
449
						}
450
					}
451
				}
452
 
453
				foreach ($r as $key => $found) {
454
					if (empty($found) && $found != 0) {
455
						continue;
456
					}
457
 
458
					if (isset($names[$key])) {
459
						$out[$names[$key]] = $_this->stripEscape($found);
460
					} elseif (isset($names[$key]) && empty($names[$key]) && empty($out[$names[$key]])) {
461
						break;
462
					} else {
463
						$argOptions['context'] = array('action' => $out['action'], 'controller' => $out['controller']);
464
						extract($_this->getArgs($found, $argOptions));
465
						$out['pass'] = array_merge($out['pass'], $pass);
466
						$out['named'] = $named;
467
					}
468
				}
469
 
470
				if (isset($params['pass'])) {
471
					for ($j = count($params['pass']) - 1; $j > -1; $j--) {
472
						if (isset($out[$params['pass'][$j]])) {
473
							array_unshift($out['pass'], $out[$params['pass'][$j]]);
474
						}
475
					}
476
				}
477
				break;
478
			}
479
		}
480
 
481
		if (!empty($ext)) {
482
			$out['url']['ext'] = $ext;
483
		}
484
		return $out;
485
	}
486
/**
487
 * Checks to see if the given URL matches the given route
488
 *
489
 * @param array $route
490
 * @param string $url
491
 * @return mixed Boolean false on failure, otherwise array
492
 * @access private
493
 */
494
	function __matchRoute($route, $url) {
495
		list($route, $regexp, $names, $defaults) = $route;
496
 
497
		if (!preg_match($regexp, $url, $r)) {
498
			return false;
499
		} else {
500
			foreach ($defaults as $key => $val) {
501
				if ($key{0} === '[' && preg_match('/^\[(\w+)\]$/', $key, $header)) {
502
					if (isset($this->__headerMap[$header[1]])) {
503
						$header = $this->__headerMap[$header[1]];
504
					} else {
505
						$header = 'http_' . $header[1];
506
					}
507
 
508
					$val = (array)$val;
509
					$h = false;
510
 
511
					foreach ($val as $v) {
512
						if (env(strtoupper($header)) === $v) {
513
							$h = true;
514
						}
515
					}
516
					if (!$h) {
517
						return false;
518
					}
519
				}
520
			}
521
		}
522
		return $r;
523
	}
524
/**
525
 * Compiles a route by numeric key and returns the compiled expression, replacing
526
 * the existing uncompiled route.  Do not call statically.
527
 *
528
 * @param integer $i
529
 * @return array Returns an array containing the compiled route
530
 * @access public
531
 */
532
	function compile($i) {
533
		$route = $this->routes[$i];
534
 
535
		if (!list($pattern, $names) = $this->writeRoute($route[0], $route[1], $route[2])) {
536
			unset($this->routes[$i]);
537
			return array();
538
		}
539
		$this->routes[$i] = array(
540
			$route[0], $pattern, $names,
541
			array_merge(array('plugin' => null, 'controller' => null), (array)$route[1]),
542
			$route[2]
543
		);
544
		return $this->routes[$i];
545
	}
546
/**
547
 * Parses a file extension out of a URL, if Router::parseExtensions() is enabled.
548
 *
549
 * @param string $url
550
 * @return array Returns an array containing the altered URL and the parsed extension.
551
 * @access private
552
 */
553
	function __parseExtension($url) {
554
		$ext = null;
555
 
556
		if ($this->__parseExtensions) {
557
			if (preg_match('/\.[0-9a-zA-Z]*$/', $url, $match) === 1) {
558
				$match = substr($match[0], 1);
559
				if (empty($this->__validExtensions)) {
560
					$url = substr($url, 0, strpos($url, '.' . $match));
561
					$ext = $match;
562
				} else {
563
					foreach ($this->__validExtensions as $name) {
564
						if (strcasecmp($name, $match) === 0) {
565
							$url = substr($url, 0, strpos($url, '.' . $name));
566
							$ext = $match;
567
						}
568
					}
569
				}
570
			}
571
			if (empty($ext)) {
572
				$ext = 'html';
573
			}
574
		}
575
		return compact('ext', 'url');
576
	}
577
/**
578
 * Connects the default, built-in routes, including admin routes, and (deprecated) web services
579
 * routes.
580
 *
581
 * @return void
582
 * @access private
583
 */
584
	function __connectDefaultRoutes() {
585
		if ($this->__defaultsMapped) {
586
			return;
587
		}
588
 
589
		if ($this->__admin) {
590
			$params = array('prefix' => $this->__admin, $this->__admin => true);
591
		}
592
 
593
		if ($plugins = Configure::listObjects('plugin')) {
594
			foreach ($plugins as $key => $value) {
595
				$plugins[$key] = Inflector::underscore($value);
596
			}
597
 
598
			$match = array('plugin' => implode('|', $plugins));
599
			$this->connect('/:plugin/:controller/:action/*', array(), $match);
600
 
601
			if ($this->__admin) {
602
				$this->connect("/{$this->__admin}/:plugin/:controller", $params, $match);
603
				$this->connect("/{$this->__admin}/:plugin/:controller/:action/*", $params, $match);
604
			}
605
		}
606
 
607
		if ($this->__admin) {
608
			$this->connect("/{$this->__admin}/:controller", $params);
609
			$this->connect("/{$this->__admin}/:controller/:action/*", $params);
610
		}
611
		$this->connect('/:controller', array('action' => 'index'));
612
		$this->connect('/:controller/:action/*');
613
 
614
		if ($this->named['rules'] === false) {
615
			$this->connectNamed(true);
616
		}
617
		$this->__defaultsMapped = true;
618
	}
619
/**
620
 * Takes parameter and path information back from the Dispatcher
621
 *
622
 * @param array $params Parameters and path information
623
 * @return void
624
 * @access public
625
 * @static
626
 */
627
	function setRequestInfo($params) {
628
		$_this =& Router::getInstance();
629
		$defaults = array('plugin' => null, 'controller' => null, 'action' => null);
630
		$params[0] = array_merge($defaults, (array)$params[0]);
631
		$params[1] = array_merge($defaults, (array)$params[1]);
632
		list($_this->__params[], $_this->__paths[]) = $params;
633
 
634
		if (count($_this->__paths)) {
635
			if (isset($_this->__paths[0]['namedArgs'])) {
636
				foreach ($_this->__paths[0]['namedArgs'] as $arg => $value) {
637
					$_this->named['rules'][$arg] = true;
638
				}
639
			}
640
		}
641
	}
642
/**
643
 * Gets parameter information
644
 *
645
 * @param boolean $current Get current parameter (true)
646
 * @return array Parameter information
647
 * @access public
648
 * @static
649
 */
650
	function getParams($current = false) {
651
		$_this =& Router::getInstance();
652
		if ($current) {
653
			return $_this->__params[count($_this->__params) - 1];
654
		}
655
		if (isset($_this->__params[0])) {
656
			return $_this->__params[0];
657
		}
658
		return array();
659
	}
660
/**
661
 * Gets URL parameter by name
662
 *
663
 * @param string $name Parameter name
664
 * @param boolean $current Current parameter
665
 * @return string Parameter value
666
 * @access public
667
 * @static
668
 */
669
	function getParam($name = 'controller', $current = false) {
670
		$params = Router::getParams($current);
671
		if (isset($params[$name])) {
672
			return $params[$name];
673
		}
674
		return null;
675
	}
676
/**
677
 * Gets path information
678
 *
679
 * @param boolean $current Current parameter
680
 * @return array
681
 * @access public
682
 * @static
683
 */
684
	function getPaths($current = false) {
685
		$_this =& Router::getInstance();
686
		if ($current) {
687
			return $_this->__paths[count($_this->__paths) - 1];
688
		}
689
		if (!isset($_this->__paths[0])) {
690
			return array('base' => null);
691
		}
692
		return $_this->__paths[0];
693
	}
694
/**
695
 * Reloads default Router settings
696
 *
697
 * @access public
698
 * @return void
699
 * @static
700
 */
701
	function reload() {
702
		$_this =& Router::getInstance();
703
		foreach (get_class_vars('Router') as $key => $val) {
704
			$_this->{$key} = $val;
705
		}
706
		$_this->__admin = Configure::read('Routing.admin');
707
	}
708
/**
709
 * Promote a route (by default, the last one added) to the beginning of the list
710
 *
711
 * @param $which A zero-based array index representing the route to move. For example,
712
 *               if 3 routes have been added, the last route would be 2.
713
 * @return boolean Retuns false if no route exists at the position specified by $which.
714
 * @access public
715
 * @static
716
 */
717
	function promote($which = null) {
718
		$_this =& Router::getInstance();
719
		if ($which === null) {
720
			$which = count($_this->routes) - 1;
721
		}
722
		if (!isset($_this->routes[$which])) {
723
			return false;
724
		}
725
		$route = $_this->routes[$which];
726
		unset($_this->routes[$which]);
727
		array_unshift($_this->routes, $route);
728
		return true;
729
	}
730
/**
731
 * Finds URL for specified action.
732
 *
733
 * Returns an URL pointing to a combination of controller and action. Param
734
 * $url can be:
735
 *	+ Empty - the method will find adress to actuall controller/action.
736
 *	+ '/' - the method will find base URL of application.
737
 *	+ A combination of controller/action - the method will find url for it.
738
 *
739
 * @param  mixed  $url    Cake-relative URL, like "/products/edit/92" or "/presidents/elect/4"
740
 *                        or an array specifying any of the following: 'controller', 'action',
741
 *                        and/or 'plugin', in addition to named arguments (keyed array elements),
742
 *                        and standard URL arguments (indexed array elements)
743
 * @param mixed $options If (bool)true, the full base URL will be prepended to the result.
744
 *                       If an array accepts the following keys
745
 *                           escape - used when making urls embedded in html escapes query string '&'
746
 *                           full - if true the full base URL will be prepended.
747
 * @return string  Full translated URL with base path.
748
 * @access public
749
 * @static
750
 */
751
	function url($url = null, $full = false) {
752
		$_this =& Router::getInstance();
753
		$defaults = $params = array('plugin' => null, 'controller' => null, 'action' => 'index');
754
 
755
		if (is_bool($full)) {
756
			$escape = false;
757
		} else {
758
			extract(array_merge(array('escape' => false, 'full' => false), $full));
759
		}
760
 
761
		if (!empty($_this->__params)) {
762
			if (isset($this) && !isset($this->params['requested'])) {
763
				$params = $_this->__params[0];
764
			} else {
765
				$params = end($_this->__params);
766
			}
767
		}
768
		$path = array('base' => null);
769
 
770
		if (!empty($_this->__paths)) {
771
			if (isset($this) && !isset($this->params['requested'])) {
772
				$path = $_this->__paths[0];
773
			} else {
774
				$path = end($_this->__paths);
775
			}
776
		}
777
		$base = $path['base'];
778
		$extension = $output = $mapped = $q = $frag = null;
779
 
780
		if (is_array($url)) {
781
			if (isset($url['base']) && $url['base'] === false) {
782
				$base = null;
783
				unset($url['base']);
784
			}
785
			if (isset($url['full_base']) && $url['full_base'] === true) {
786
				$full = true;
787
				unset($url['full_base']);
788
			}
789
			if (isset($url['?'])) {
790
				$q = $url['?'];
791
				unset($url['?']);
792
			}
793
			if (isset($url['#'])) {
794
				$frag = '#' . urlencode($url['#']);
795
				unset($url['#']);
796
			}
797
			if (empty($url['action'])) {
798
				if (empty($url['controller']) || $params['controller'] === $url['controller']) {
799
					$url['action'] = $params['action'];
800
				} else {
801
					$url['action'] = 'index';
802
				}
803
			}
804
			if ($_this->__admin) {
805
				if (!isset($url[$_this->__admin]) && !empty($params[$_this->__admin])) {
806
					$url[$_this->__admin] = true;
807
				} elseif ($_this->__admin && isset($url[$_this->__admin]) && !$url[$_this->__admin]) {
808
					unset($url[$_this->__admin]);
809
				}
810
			}
811
			$plugin = false;
812
 
813
			if (array_key_exists('plugin', $url)) {
814
				$plugin = $url['plugin'];
815
			}
816
 
817
			$url = array_merge(array('controller' => $params['controller'], 'plugin' => $params['plugin']), Set::filter($url, true));
818
 
819
			if ($plugin !== false) {
820
				$url['plugin'] = $plugin;
821
			}
822
 
823
			if (isset($url['ext'])) {
824
				$extension = '.' . $url['ext'];
825
				unset($url['ext']);
826
			}
827
			$match = false;
828
 
829
			foreach ($_this->routes as $i => $route) {
830
				if (count($route) === 3) {
831
					$route = $_this->compile($i);
832
				}
833
				$originalUrl = $url;
834
 
835
				if (isset($route[4]['persist'], $_this->__params[0])) {
836
					$url = array_merge(array_intersect_key($params, Set::combine($route[4]['persist'], '/')), $url);
837
				}
838
				if ($match = $_this->mapRouteElements($route, $url)) {
839
					$output = trim($match, '/');
840
					$url = array();
841
					break;
842
				}
843
				$url = $originalUrl;
844
			}
845
			$named = $args = array();
846
			$skip = array(
847
				'bare', 'action', 'controller', 'plugin', 'ext', '?', '#', 'prefix', $_this->__admin
848
			);
849
 
850
			$keys = array_values(array_diff(array_keys($url), $skip));
851
			$count = count($keys);
852
 
853
			// Remove this once parsed URL parameters can be inserted into 'pass'
854
			for ($i = 0; $i < $count; $i++) {
855
				if ($i === 0 && is_numeric($keys[$i]) && in_array('id', $keys)) {
856
					$args[0] = $url[$keys[$i]];
857
				} elseif (is_numeric($keys[$i]) || $keys[$i] === 'id') {
858
					$args[] = $url[$keys[$i]];
859
				} else {
860
					$named[$keys[$i]] = $url[$keys[$i]];
861
				}
862
			}
863
 
864
			if ($match === false) {
865
				list($args, $named)  = array(Set::filter($args, true), Set::filter($named));
866
				if (!empty($url[$_this->__admin])) {
867
					$url['action'] = str_replace($_this->__admin . '_', '', $url['action']);
868
				}
869
 
870
				if (empty($named) && empty($args) && (!isset($url['action']) || $url['action'] === 'index')) {
871
					$url['action'] = null;
872
				}
873
 
874
				$urlOut = Set::filter(array($url['controller'], $url['action']));
875
 
876
				if (isset($url['plugin']) && $url['plugin'] != $url['controller']) {
877
					array_unshift($urlOut, $url['plugin']);
878
				}
879
 
880
				if ($_this->__admin && isset($url[$_this->__admin])) {
881
					array_unshift($urlOut, $_this->__admin);
882
				}
883
				$output = join('/', $urlOut) . '/';
884
			}
885
 
886
			if (!empty($args)) {
887
				$args = join('/', $args);
888
				if ($output{strlen($output) - 1} != '/') {
889
					$args = '/'. $args;
890
				}
891
				$output .= $args;
892
			}
893
 
894
			if (!empty($named)) {
895
				foreach ($named as $name => $value) {
896
					$output .= '/' . $name . $_this->named['separator'] . $value;
897
				}
898
			}
899
 
900
			$output = str_replace('//', '/', $base . '/' . $output);
901
		} else {
902
			if (((strpos($url, '://')) || (strpos($url, 'javascript:') === 0) || (strpos($url, 'mailto:') === 0)) || (!strncmp($url, '#', 1))) {
903
				return $url;
904
			}
905
			if (empty($url)) {
906
				if (!isset($path['here'])) {
907
					$path['here'] = '/';
908
				}
909
				$output = $path['here'];
910
			} elseif (substr($url, 0, 1) === '/') {
911
				$output = $base . $url;
912
			} else {
913
				$output = $base . '/';
914
				if ($_this->__admin && isset($params[$_this->__admin])) {
915
					$output .= $_this->__admin . '/';
916
				}
917
				if (!empty($params['plugin']) && $params['plugin'] !== $params['controller']) {
918
					$output .= Inflector::underscore($params['plugin']) . '/';
919
				}
920
				$output .= Inflector::underscore($params['controller']) . '/' . $url;
921
			}
922
			$output = str_replace('//', '/', $output);
923
		}
924
		if ($full && defined('FULL_BASE_URL')) {
925
			$output = FULL_BASE_URL . $output;
926
		}
927
		if (!empty($extension) && substr($output, -1) === '/') {
928
			$output = substr($output, 0, -1);
929
		}
930
 
931
		return $output . $extension . $_this->queryString($q, array(), $escape) . $frag;
932
	}
933
/**
934
 * Maps a URL array onto a route and returns the string result, or false if no match
935
 *
936
 * @param array $route Route Route
937
 * @param array $url URL URL to map
938
 * @return mixed Result (as string) or false if no match
939
 * @access public
940
 * @static
941
 */
942
	function mapRouteElements($route, $url) {
943
		if (isset($route[3]['prefix'])) {
944
			$prefix = $route[3]['prefix'];
945
			unset($route[3]['prefix']);
946
		}
947
 
948
		$pass = array();
949
		$defaults = $route[3];
950
		$routeParams = $route[2];
951
		$params = Set::diff($url, $defaults);
952
		$urlInv = array_combine(array_values($url), array_keys($url));
953
 
954
		$i = 0;
955
		while (isset($defaults[$i])) {
956
			if (isset($urlInv[$defaults[$i]])) {
957
				if (!in_array($defaults[$i], $url) && is_int($urlInv[$defaults[$i]])) {
958
					return false;
959
				}
960
				unset($urlInv[$defaults[$i]], $defaults[$i]);
961
			} else {
962
				return false;
963
			}
964
			$i++;
965
		}
966
 
967
		foreach ($params as $key => $value) {
968
			if (is_int($key)) {
969
				$pass[] = $value;
970
				unset($params[$key]);
971
			}
972
		}
973
		list($named, $params) = Router::getNamedElements($params);
974
 
975
		if (!strpos($route[0], '*') && (!empty($pass) || !empty($named))) {
976
			return false;
977
		}
978
 
979
		$urlKeys = array_keys($url);
980
		$paramsKeys = array_keys($params);
981
		$defaultsKeys = array_keys($defaults);
982
 
983
		if (!empty($params)) {
984
			if (array_diff($paramsKeys, $routeParams) != array()) {
985
				return false;
986
			}
987
			$required = array_values(array_diff($routeParams, $urlKeys));
988
			$reqCount = count($required);
989
 
990
			for ($i = 0; $i < $reqCount; $i++) {
991
				if (array_key_exists($required[$i], $defaults) && $defaults[$required[$i]] === null) {
992
					unset($required[$i]);
993
				}
994
			}
995
		}
996
		$isFilled = true;
997
 
998
		if (!empty($routeParams)) {
999
			$filled = array_intersect_key($url, array_combine($routeParams, array_keys($routeParams)));
1000
			$isFilled = (array_diff($routeParams, array_keys($filled)) === array());
1001
			if (!$isFilled && empty($params)) {
1002
				return false;
1003
			}
1004
		}
1005
 
1006
		if (empty($params)) {
1007
			return Router::__mapRoute($route, array_merge($url, compact('pass', 'named', 'prefix')));
1008
		} elseif (!empty($routeParams) && !empty($route[3])) {
1009
 
1010
			if (!empty($required)) {
1011
				return false;
1012
			}
1013
			foreach ($params as $key => $val) {
1014
				if ((!isset($url[$key]) || $url[$key] != $val) || (!isset($defaults[$key]) || $defaults[$key] != $val) && !in_array($key, $routeParams)) {
1015
					if (!isset($defaults[$key])) {
1016
						continue;
1017
					}
1018
					return false;
1019
				}
1020
			}
1021
		} else {
1022
			if (empty($required) && $defaults['plugin'] === $url['plugin'] && $defaults['controller'] === $url['controller'] && $defaults['action'] === $url['action']) {
1023
				return Router::__mapRoute($route, array_merge($url, compact('pass', 'named', 'prefix')));
1024
			}
1025
			return false;
1026
		}
1027
 
1028
		if (!empty($route[4])) {
1029
			foreach ($route[4] as $key => $reg) {
1030
				if (array_key_exists($key, $url) && !preg_match('#' . $reg . '#', $url[$key])) {
1031
					return false;
1032
				}
1033
			}
1034
		}
1035
		return Router::__mapRoute($route, array_merge($filled, compact('pass', 'named', 'prefix')));
1036
	}
1037
/**
1038
 * Merges URL parameters into a route string
1039
 *
1040
 * @param array $route Route
1041
 * @param array $params Parameters
1042
 * @return string Merged URL with parameters
1043
 * @access private
1044
 */
1045
	function __mapRoute($route, $params = array()) {
1046
		if (isset($params['plugin']) && isset($params['controller']) && $params['plugin'] === $params['controller']) {
1047
			unset($params['controller']);
1048
		}
1049
 
1050
		if (isset($params['prefix']) && isset($params['action'])) {
1051
			$params['action'] = str_replace($params['prefix'] . '_', '', $params['action']);
1052
			unset($params['prefix']);
1053
		}
1054
 
1055
		if (isset($params['pass']) && is_array($params['pass'])) {
1056
			$params['pass'] = implode('/', Set::filter($params['pass'], true));
1057
		} elseif (!isset($params['pass'])) {
1058
			$params['pass'] = '';
1059
		}
1060
 
1061
		if (isset($params['named'])) {
1062
			if (is_array($params['named'])) {
1063
				$count = count($params['named']);
1064
				$keys = array_keys($params['named']);
1065
				$named = array();
1066
 
1067
				for ($i = 0; $i < $count; $i++) {
1068
					$named[] = $keys[$i] . $this->named['separator'] . $params['named'][$keys[$i]];
1069
				}
1070
				$params['named'] = join('/', $named);
1071
			}
1072
			$params['pass'] = str_replace('//', '/', $params['pass'] . '/' . $params['named']);
1073
		}
1074
		$out = $route[0];
1075
 
1076
		foreach ($route[2] as $key) {
1077
			$string = null;
1078
			if (isset($params[$key])) {
1079
				$string = $params[$key];
1080
				unset($params[$key]);
1081
			}
1082
			$out = str_replace(':' . $key, $string, $out);
1083
		}
1084
 
1085
		if (strpos($route[0], '*')) {
1086
			$out = str_replace('*', $params['pass'], $out);
1087
		}
1088
		return $out;
1089
	}
1090
/**
1091
 * Takes an array of URL parameters and separates the ones that can be used as named arguments
1092
 *
1093
 * @param array $params			Associative array of URL parameters.
1094
 * @param string $controller	Name of controller being routed.  Used in scoping.
1095
 * @param string $action	 	Name of action being routed.  Used in scoping.
1096
 * @return array
1097
 * @access public
1098
 * @static
1099
 */
1100
	function getNamedElements($params, $controller = null, $action = null) {
1101
		$_this =& Router::getInstance();
1102
		$named = array();
1103
 
1104
		foreach ($params as $param => $val) {
1105
			if (isset($_this->named['rules'][$param])) {
1106
				$rule = $_this->named['rules'][$param];
1107
				if (Router::matchNamed($param, $val, $rule, compact('controller', 'action'))) {
1108
					$named[$param] = $val;
1109
					unset($params[$param]);
1110
				}
1111
			}
1112
		}
1113
		return array($named, $params);
1114
	}
1115
/**
1116
 * Return true if a given named $param's $val matches a given $rule depending on $context. Currently implemented
1117
 * rule types are controller, action and match that can be combined with each other.
1118
 *
1119
 * @param string $param The name of the named parameter
1120
 * @param string $val The value of the named parameter
1121
 * @param array $rule The rule(s) to apply, can also be a match string
1122
 * @param string $context An array with additional context information (controller / action)
1123
 * @return boolean
1124
 * @access public
1125
 */
1126
	function matchNamed($param, $val, $rule, $context = array()) {
1127
		if ($rule === true || $rule === false) {
1128
			return $rule;
1129
		}
1130
		if (is_string($rule)) {
1131
			$rule = array('match' => $rule);
1132
		}
1133
		if (!is_array($rule)) {
1134
			return false;
1135
		}
1136
 
1137
		$controllerMatches = !isset($rule['controller'], $context['controller']) || in_array($context['controller'], (array)$rule['controller']);
1138
		if (!$controllerMatches) {
1139
			return false;
1140
		}
1141
		$actionMatches = !isset($rule['action'], $context['action']) || in_array($context['action'], (array)$rule['action']);
1142
		if (!$actionMatches) {
1143
			return false;
1144
		}
1145
		$valueMatches = !isset($rule['match']) || preg_match(sprintf('/%s/', $rule['match']), $val);
1146
		return $valueMatches;
1147
	}
1148
/**
1149
 * Generates a well-formed querystring from $q
1150
 *
1151
 * @param mixed $q Query string
1152
 * @param array $extra Extra querystring parameters.
1153
 * @param bool $escape Whether or not to use escaped &
1154
 * @return array
1155
 * @access public
1156
 * @static
1157
 */
1158
	function queryString($q, $extra = array(), $escape = false) {
1159
		if (empty($q) && empty($extra)) {
1160
			return null;
1161
		}
1162
		$join = '&';
1163
		if ($escape === true) {
1164
			$join = '&amp;';
1165
		}
1166
		$out = '';
1167
 
1168
		if (is_array($q)) {
1169
			$q = array_merge($extra, $q);
1170
		} else {
1171
			$out = $q;
1172
			$q = $extra;
1173
		}
1174
		$out .= http_build_query($q, null, $join);
1175
		if (isset($out[0]) && $out[0] != '?') {
1176
			$out = '?' . $out;
1177
		}
1178
		return $out;
1179
	}
1180
/**
1181
 * Normalizes a URL for purposes of comparison
1182
 *
1183
 * @param mixed $url URL to normalize
1184
 * @return string Normalized URL
1185
 * @access public
1186
 */
1187
	function normalize($url = '/') {
1188
		if (is_array($url)) {
1189
			$url = Router::url($url);
1190
		} elseif (preg_match('/^[a-z\-]+:\/\//', $url)) {
1191
			return $url;
1192
		}
1193
		$paths = Router::getPaths();
1194
 
1195
		if (!empty($paths['base']) && stristr($url, $paths['base'])) {
1196
			$url = preg_replace('/' . preg_quote($paths['base'], '/') . '/', '', $url, 1);
1197
		}
1198
		$url = '/' . $url;
1199
 
1200
		while (strpos($url, '//') !== false) {
1201
			$url = str_replace('//', '/', $url);
1202
		}
1203
		$url = preg_replace('/(?:(\/$))/', '', $url);
1204
 
1205
		if (empty($url)) {
1206
			return '/';
1207
		}
1208
		return $url;
1209
	}
1210
/**
1211
 * Returns the route matching the current request URL.
1212
 *
1213
 * @return array Matching route
1214
 * @access public
1215
 * @static
1216
 */
1217
	function requestRoute() {
1218
		$_this =& Router::getInstance();
1219
		return $_this->__currentRoute[0];
1220
	}
1221
/**
1222
 * Returns the route matching the current request (useful for requestAction traces)
1223
 *
1224
 * @return array Matching route
1225
 * @access public
1226
 * @static
1227
 */
1228
	function currentRoute() {
1229
		$_this =& Router::getInstance();
1230
		return $_this->__currentRoute[count($_this->__currentRoute) - 1];
1231
	}
1232
/**
1233
 * Removes the plugin name from the base URL.
1234
 *
1235
 * @param string $base Base URL
1236
 * @param string $plugin Plugin name
1237
 * @return base url with plugin name removed if present
1238
 * @access public
1239
 * @static
1240
 */
1241
	function stripPlugin($base, $plugin) {
1242
		if ($plugin != null) {
1243
			$base = preg_replace('/(?:' . $plugin . ')/', '', $base);
1244
			$base = str_replace('//', '', $base);
1245
			$pos1 = strrpos($base, '/');
1246
			$char = strlen($base) - 1;
1247
 
1248
			if ($pos1 === $char) {
1249
				$base = substr($base, 0, $char);
1250
			}
1251
		}
1252
		return $base;
1253
	}
1254
 
1255
/**
1256
 * Strip escape characters from parameter values.
1257
 *
1258
 * @param mixed $param Either an array, or a string
1259
 * @return mixed Array or string escaped
1260
 * @access public
1261
 * @static
1262
 */
1263
	function stripEscape($param) {
1264
		$_this =& Router::getInstance();
1265
		if (!is_array($param) || empty($param)) {
1266
			if (is_bool($param)) {
1267
				return $param;
1268
			}
1269
 
1270
			$return = preg_replace('/^(?:[\\t ]*(?:-!)+)/', '', $param);
1271
			return $return;
1272
		}
1273
		foreach ($param as $key => $value) {
1274
			if (is_string($value)) {
1275
				$return[$key] = preg_replace('/^(?:[\\t ]*(?:-!)+)/', '', $value);
1276
			} else {
1277
				foreach ($value as $array => $string) {
1278
					$return[$key][$array] = $_this->stripEscape($string);
1279
				}
1280
			}
1281
		}
1282
		return $return;
1283
	}
1284
/**
1285
 * Instructs the router to parse out file extensions from the URL. For example,
1286
 * http://example.com/posts.rss would yield an file extension of "rss".
1287
 * The file extension itself is made available in the controller as
1288
 * $this->params['url']['ext'], and is used by the RequestHandler component to
1289
 * automatically switch to alternate layouts and templates, and load helpers
1290
 * corresponding to the given content, i.e. RssHelper.
1291
 *
1292
 * A list of valid extension can be passed to this method, i.e. Router::parseExtensions('rss', 'xml');
1293
 * If no parameters are given, anything after the first . (dot) after the last / in the URL will be
1294
 * parsed, excluding querystring parameters (i.e. ?q=...).
1295
 *
1296
 * @access public
1297
 * @return void
1298
 * @static
1299
 */
1300
	function parseExtensions() {
1301
		$_this =& Router::getInstance();
1302
		$_this->__parseExtensions = true;
1303
		if (func_num_args() > 0) {
1304
			$_this->__validExtensions = func_get_args();
1305
		}
1306
	}
1307
/**
1308
 * Takes an passed params and converts it to args
1309
 *
1310
 * @param array $params
1311
 * @return array Array containing passed and named parameters
1312
 * @access public
1313
 * @static
1314
 */
1315
	function getArgs($args, $options = array()) {
1316
		$_this =& Router::getInstance();
1317
		$pass = $named = array();
1318
		$args = explode('/', $args);
1319
 
1320
		$greedy = $_this->named['greedy'];
1321
		if (isset($options['greedy'])) {
1322
			$greedy = $options['greedy'];
1323
		}
1324
		$context = array();
1325
		if (isset($options['context'])) {
1326
			$context = $options['context'];
1327
		}
1328
		$rules = $_this->named['rules'];
1329
		if (isset($options['named'])) {
1330
			$greedy = isset($options['greedy']) && $options['greedy'] === true;
1331
			foreach ((array)$options['named'] as $key => $val) {
1332
				if (is_numeric($key)) {
1333
					$rules[$val] = true;
1334
					continue;
1335
				}
1336
				$rules[$key] = $val;
1337
			}
1338
		}
1339
 
1340
		foreach ($args as $param) {
1341
			if (empty($param) && $param !== '0' && $param !== 0) {
1342
				continue;
1343
			}
1344
			$param = $_this->stripEscape($param);
1345
			if ((!isset($options['named']) || !empty($options['named'])) && strpos($param, $_this->named['separator']) !== false) {
1346
				list($key, $val) = explode($_this->named['separator'], $param, 2);
1347
				$hasRule = isset($rules[$key]);
1348
				$passIt = (!$hasRule && !$greedy) || ($hasRule && !Router::matchNamed($key, $val, $rules[$key], $context));
1349
				if ($passIt) {
1350
					$pass[] = $param;
1351
				} else {
1352
					$named[$key] = $val;
1353
				}
1354
			} else {
1355
				$pass[] = $param;
1356
			}
1357
		}
1358
		return compact('pass', 'named');
1359
	}
1360
}
1361
?>