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Validation.php

Timestamp:

02/14/2008 05:26:13 PM (11 months ago)

Author:

Shadowhand

Message:

Replacing Validation with the shiny new extensible version.

Files:

: 1 modified

trunk/system/libraries/Validation.php (modified) (1 diff)

Legend:

: Unmodified
: Added
: Removed

trunk/system/libraries/Validation.php

r1992	r2046
10	10	* @license http://kohanaphp.com/license.html
11	11	*/
12		class Validation_Core {
13
14		// Instance count
15		private static $instances = 0;
16
17		// Currently validating field
18		public $current_field = '';
19
20		// Enable or disable safe form errors
21		public $form_safe = FALSE;
22
23		// Error message format
24		public $error_format = '<p class="error">{message}</p>';
25		public $newline_char = "\n";
26
27		// Error messages
28		public $messages = array();
29
30		// Field names, rules, and errors
31		protected $fields = array();
32		protected $rules = array();
	12	class Validation_Core extends ArrayObject {
	13
	14	// Unique "any field" key
	15	protected $any_field;
	16
	17	// Message output format
	18	protected $message_format = '<p class="error">{message}</p>';
	19
	20	// Filters
	21	protected $pre_filters = array();
	22	protected $post_filters = array();
	23
	24	// Rules and callbacks
	25	protected $rules = array();
	26	protected $callbacks = array();
	27
	28	// Errors
33	29	protected $errors = array();
34
35		// Data to validate
36		protected $data = array();
37
38		// Result from validation rules
39		protected $result;
40
41		/**
42		* @param array array to validate
43		*/
44		public function __construct( & $data = array())
45		{
46		$this->set_data($data);
47
48		// Load the default error messages
49		$this->messages = Kohana::lang('validation');
50
51		// Add one more instance to the count
52		self::$instances++;
53
54		Log::add('debug', 'Validation Library Initialized, instance '.self::$instances);
55		}
56
57		/**
58		* Magically gets a validation variable. This can be an error string or a
59		* data field, or an array of all field data.
60		*
61		* @param string Variable name
62		* @return string\|array The variable contents or NULL if the variable does not exist
63		*/
64		public function __get($key)
65		{
66		if ( ! isset($this->$key))
67		{
68		if ($key === 'error_string')
69		{
70		// Complete error message string
71		$messages = FALSE;
72		foreach(array_keys($this->errors) as $field)
73		{
74		$messages .= $this->__get($field.'_error');
75		}
76		return $messages;
77		}
78		elseif (substr($key, -6) === '_error')
79		{
80		// Get the field name
81		$field = substr($key, 0, -6);
82
83		// Return the error messages for this field
84		$messages = FALSE;
85		if (isset($this->errors[$field]) AND ! empty($this->errors[$field]))
86		{
87		foreach($this->errors[$field] as $error)
	30	protected $messages = array();
	31
	32	/**
	33	* Creates a new Validation instance.
	34	*
	35	* @param array array to use for validation
	36	* @return object
	37	*/
	38	public static function factory($array = NULL)
	39	{
	40	return new Validation( ! is_array($array) ? $_POST : $array);
	41	}
	42
	43	/**
	44	* Sets the unique "any field" key and creates an ArrayObject from the
	45	* passed array.
	46	*
	47	* @param array array to validate
	48	* @return void
	49	*/
	50	public function __construct(array $array)
	51	{
	52	// Set a dynamic, unique "any field" key
	53	$this->any_field = uniqid(NULL, TRUE);
	54
	55	parent::__construct($array, ArrayObject::ARRAY_AS_PROPS \| ArrayObject::STD_PROP_LIST);
	56	}
	57
	58	/**
	59	* Returns the ArrayObject array values.
	60	*
	61	* @return array
	62	*/
	63	public function as_array()
	64	{
	65	return $this->getArrayCopy();
	66	}
	67
	68	/**
	69	* Set the format of message strings.
	70	*
	71	* @chainable
	72	* @param string new message format
	73	* @return object
	74	*/
	75	public function message_format($str)
	76	{
	77	if (strpos($str, '{message}') === FALSE)
	78	throw new Kohana_Exception('validation.error_format');
	79
	80	// Set the new message format
	81	$this->message_format = $str;
	82
	83	return $this;
	84	}
	85
	86	/**
	87	* Sets or returns the message for an input.
	88	*
	89	* @chainable
	90	* @param string input key
	91	* @param string message to set
	92	* @return string\|object
	93	*/
	94	public function message($input, $message = NULL)
	95	{
	96	if ($message === NULL)
	97	{
	98	// Return nothing if no message exists
	99	if (empty($this->messages[$input]))
	100	return '';
	101
	102	// Return the HTML message string
	103	return str_replace('{message}', $this->messages[$input], $this->message_format);
	104	}
	105	else
	106	{
	107	$this->messages[$input] = $message;
	108	}
	109
	110	return $this;
	111	}
	112
	113	/**
	114	* Add a pre-filter to one or more inputs.
	115	*
	116	* @chainable
	117	* @param callback filter
	118	* @param string fields to apply filter to, use TRUE for all fields
	119	* @return object
	120	*/
	121	public function pre_filter($filter, $field = TRUE)
	122	{
	123	if ( ! is_callable($filter))
	124	throw new Kohana_Exception('validation.filter_not_callable');
	125
	126	if ($field === TRUE)
	127	{
	128	// Handle "any field" filters
	129	$fields = $this->any_field;
	130	}
	131	else
	132	{
	133	// Add the filter to specific inputs
	134	$fields = func_get_args();
	135	$fields = array_slice($fields, 1);
	136	}
	137
	138	foreach ($fields as $field)
	139	{
	140	// Add the filter to specified field
	141	$this->pre_filters[$field][] = $filter;
	142	}
	143
	144	return $this;
	145	}
	146
	147	/**
	148	* Add a post-filter to one or more inputs.
	149	*
	150	* @chainable
	151	* @param callback filter
	152	* @param string fields to apply filter to, use TRUE for all fields
	153	* @return object
	154	*/
	155	public function post_filter($filter, $field = TRUE)
	156	{
	157	if ( ! is_callable($filter, TRUE))
	158	throw new Kohana_Exception('validation.filter_not_callable');
	159
	160	if ($field === TRUE)
	161	{
	162	// Handle "any field" filters
	163	$fields = $this->any_field;
	164	}
	165	else
	166	{
	167	// Add the filter to specific inputs
	168	$fields = func_get_args();
	169	$fields = array_slice($fields, 1);
	170	}
	171
	172	foreach ($fields as $field)
	173	{
	174	// Add the filter to specified field
	175	$this->post_filters[$field][] = $filter;
	176	}
	177
	178	return $this;
	179	}
	180
	181	/**
	182	* Add rules to a field. Rules are callbacks or validation methods. Rules can
	183	* only return TRUE or FALSE.
	184	*
	185	* @chainable
	186	* @param string field name
	187	* @param callback rules (unlimited number)
	188	* @return object
	189	*/
	190	public function add_rules($field, $rules)
	191	{
	192	// Handle "any field" filters
	193	($field === TRUE) and $field = $this->any_field;
	194
	195	// Get the rules
	196	$rules = func_get_args();
	197	$rules = array_slice($rules, 1);
	198
	199	foreach ($rules as $rule)
	200	{
	201	// Rule arguments
	202	$args = NULL;
	203
	204	if (is_string($rule))
	205	{
	206	if (preg_match('/^([^\[]++)\[(.+)\]$/', $rule, $matches))
	207	{
	208	// Split the rule into the function and args
	209	$rule = $matches[1];
	210	$args = preg_split('/(?<!\\\\),\s*/', $matches[2]);
	211	}
	212
	213	if (method_exists($this, $rule))
	214	{
	215	// Make the rule a valid callback
	216	$rule = array($this, $rule);
	217	}
	218	}
	219
	220	if ( ! is_callable($rule, TRUE))
	221	throw new Kohana_Exception('validation.rule_not_callable');
	222
	223	// Add the rule to specified field
	224	$this->rules[$field][] = array($rule, $args);
	225	}
	226
	227	return $this;
	228	}
	229
	230	/**
	231	* Add callbacks to a field. Callbacks must accept the Validation object
	232	* and the input name. Callback returns are not processed.
	233	*
	234	* @chainable
	235	* @param string field name
	236	* @param callbacks callbacks (unlimited number)
	237	* @return object
	238	*/
	239	public function add_callbacks($field, $callbacks)
	240	{
	241	// Handle "any field" filters
	242	($field === TRUE) and $field = $this->any_field;
	243
	244	if (func_get_args() > 2)
	245	{
	246	// Multiple callback
	247	$callbacks = func_get_args();
	248	$callbacks = array_slice($callbacks, 1);
	249	}
	250	else
	251	{
	252	// Only one callback
	253	$callbacks = array($callbacks);
	254	}
	255
	256	foreach ($callbacks as $callback)
	257	{
	258	if ( ! is_callable($callback, TRUE))
	259	throw new Kohana_Exception('validation.callback_not_callable');
	260
	261	// Add the filter to specified field
	262	$this->callbacks[$field][] = $callback;
	263	}
	264
	265	return $this;
	266	}
	267
	268	/**
	269	* Validate by processing pre-filters, rules, callbacks, and post-filters.
	270	* All fields that have filters, rules, or callbacks will be initialized if
	271	* they are undefined. Validation will only be run if there is data already
	272	* in the array.
	273	*
	274	* @return bool
	275	*/
	276	public function validate()
	277	{
	278	// All the fields that are being validated
	279	$all_fields = array_unique(array_merge
	280	(
	281	array_keys($this->pre_filters),
	282	array_keys($this->rules),
	283	array_keys($this->callbacks),
	284	array_keys($this->post_filters)
	285	));
	286
	287	// Only run validation when POST data exists
	288	$run_validation = (count($this) > 0);
	289
	290	foreach ($all_fields as $i => $field)
	291	{
	292	if ($field === $this->any_field)
	293	{
	294	// Remove "any field" from the list of fields
	295	unset($all_fields[$i]);
	296	continue;
	297	}
	298
	299	// Make sure all fields are defined
	300	isset($this[$field]) or $this[$field] = NULL;
	301	}
	302
	303	if ($run_validation === FALSE)
	304	return FALSE;
	305
	306	// Reset all fields to ALL defined fields
	307	$all_fields = array_keys($this->getArrayCopy());
	308
	309	foreach ($this->pre_filters as $field => $calls)
	310	{
	311	foreach ($calls as $func)
	312	{
	313	if ($field === $this->any_field)
	314	{
	315	foreach ($all_fields as $f)
88	316	{
89		// ~~Replace the message with the error in the html error string~~
90		$~~messages .= str_replace('{message}', $error, $this->error_format).$this->newline_char~~;
	317	// Process each filter
	318	$this[$f] = is_array($this[$f]) ? array_map($func, $this[$f]) : call_user_func($func, $this[$f]);
91	319	}
92	320	}
93		return $messages;
94		}
95		elseif (isset($this->data[$key]))
96		{
97		return $this->data[$key];
98		}
99		elseif ($key === 'data_array')
100		{
101		$data = array();
102		foreach (array_keys($this->rules) as $key)
103		{
104		if (isset($this->data[$key]))
	321	else
	322	{
	323	// Process each filter
	324	$this[$field] = is_array($this[$field]) ? array_map($func, $this[$field]) : call_user_func($func, $this[$field]);
	325	}
	326	}
	327	}
	328
	329	foreach ($this->rules as $field => $calls)
	330	{
	331	foreach ($calls as $call)
	332	{
	333	// Split the rule into function and args
	334	list($func, $args) = $call;
	335
	336	if ($field === $this->any_field)
	337	{
	338	foreach ($all_fields as $f)
105	339	{
106		$data[$key] = $this->data[$key];
107		}
108		}
109		return $data;
110		}
111		}
112		}
113
114		/**
115		* This function takes an array of key names, rules, and field names as
116		* input and sets internal field information.
117		*
118		* @param string\|array Key names
119		* @param string Rules
120		* @param string Field name
121		* @return void
122		*/
123		public function set_rules($data, $rules = '', $field = FALSE)
124		{
125		// Normalize rules to an array
126		if ( ! is_array($data))
127		{
128		if ($rules == '') return FALSE;
129
130		// Make data into an array
131		$data = array($data => array($field, $rules));
132		}
133
134		// Set the field information
135		foreach ($data as $name => $rules)
136		{
137		if (is_array($rules))
138		{
139		if (count($rules) > 1)
140		{
141		$field = current($rules);
142		$rules = next($rules);
143		}
144		else
145		{
146		$rules = current($rules);
147		}
148		}
149
150		// Empty field names default to the name of the element
151		$this->fields[$name] = empty($field) ? $name : $field;
152		$this->rules[$name] = $rules;
153
154		// Prevent fields from getting the wrong name
155		unset($field);
156		}
157		}
158
159		/**
160		* Lets users set their own error messages on the fly.
161		* Note - The key name has to match the function name that it corresponds to.
162		*
163		* @param string Function name
164		* @param string Error message
165		* @return void
166		*/
167		public function set_message($func, $message = '')
168		{
169		if ( ! is_array($func))
170		{
171		$func = array($func => $message);
172		}
173
174		foreach($func as $name => $message)
175		{
176		$this->messages[$name] = $message;
177		}
178		}
179
180		/**
181		* @param array Data to validate
182		* @return void
183		*/
184		public function set_data( & $data)
185		{
186		if ( ! empty($data) AND is_array($data))
187		{
188		$this->data =& $data;
189		}
190		else
191		{
192		$this->data =& $_POST;
193		}
194		}
195
196		/**
197		* Allows the user to change the error message format. Error formats must
198		* contain the string "{message}" or Kohana_Exception will be triggered.
199		*
200		* @param string Error message format
201		* @return void
202		*/
203		public function error_format($string = '')
204		{
205		if (strpos((string) $string, '{message}') === FALSE)
206		throw new Kohana_Exception('validation.error_format');
207
208		$this->error_format = $string;
209		}
210
211		/**
212		* @param string Function name
213		* @param string field name
214		* @return void
215		*/
216		public function add_error($func, $field)
217		{
218		// Set the friendly field name
219		$friendly = isset($this->fields[$field]) ? $this->fields[$field] : $field;
220
221		// Fetch the message
222		$message = isset($this->messages[$func]) ? $this->messages[$func] : $this->messages['unknown_error'];
223
224		// Replacements in strings
225		$replace = array_slice(func_get_args(), 1);
226
227		if ( ! empty($replace) AND $replace[0] === $field)
228		{
229		// Add the friendly name instead of the field name
230		$replace[0] = $friendly;
231		}
232
233		// Add the field name into the message, if there is a place for it
234		$message = (strpos($message, '%s') !== FALSE) ? vsprintf($message, $replace) : $message;
235
236		$this->errors[$field][] = $message;
237		}
238
239		/**
240		* This function does all the work.
241		*
242		* @return boolean The validation result
243		*/
244		public function run()
245		{
246		// Do we even have any data to process? Mm?
247		if (count($this->data) == 0 OR count($this->rules) == 0)
248		{
249		return FALSE;
250		}
251
252		// Cycle through the rules and test for errors
253		foreach ($this->rules as $field => $rules)
254		{
255		// Set the current field, for other functions to use
256		$this->current_field = $field;
257
258		// Insert uploads into the data
259		if (strpos($rules, 'upload') !== FALSE AND isset($_FILES[$field]))
260		{
261		if (is_array($_FILES[$field]['error']))
262		{
263		foreach($_FILES[$field]['error'] as $error)
264		{
265		if ($error !== UPLOAD_ERR_NO_FILE)
	340	// Prevent other rules from running when this field already has errors
	341	if ( ! empty($this->errors[$f])) break;
	342
	343	// Don't process rules on empty fields
	344	if (($func[1] !== 'required' AND $func[1] !== 'matches') AND empty($this[$f]))
	345	continue;
	346
	347	// Run each rule
	348	if ( ! call_user_func($func, $this[$f], $args))
266	349	{
267		$this->data[$field] = $_FILES[$field];
268		break;
	350	$this->errors[$f] = is_array($func) ? $func[1] : $func;
269	351	}
270	352	}
271	353	}
272		elseif ($_FILES[$field]['error'] !== UPLOAD_ERR_NO_FILE)
273		{
274		$this->data[$field] = $_FILES[$field];
275		}
276		}
277
278		// Process empty fields
279		if ( ! isset($this->data[$field]) OR $this->data[$field] == NULL)
280		{
281		// This field is required
282		if (strpos($rules, 'required') !== FALSE)
283		{
284		$this->add_error('required', $field);
285		}
286		continue;
287		}
288
289		// Loop through the rules and process each one
290		foreach(explode('\|', $rules) as $rule)
291		{
292		// To properly handle recursion
293		$this->run_rule($rule, $field);
294
295		// Stop validating when there is an error
296		if ($this->result === FALSE)
297		break;
298		}
299		}
300
301		// Run validation finished Event and return
302		if (count($this->errors) == 0)
303		{
304		Event::run('validation.success', $this->data);
305		return TRUE;
	354	else
	355	{
	356	// Prevent other rules from running when this field already has errors
	357	if ( ! empty($thi