1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  6:  * @package Nette\Forms
  7:  */
  8: 
  9: 
 10: 
 11: /**
 12:  * Creates, validates and renders HTML forms.
 13:  *
 14:  * @author     David Grudl
 15:  *
 16:  * @property   mixed $action
 17:  * @property   string $method
 18:  * @property-read array $groups
 19:  * @property   ITranslator|NULL $translator
 20:  * @property-read bool $anchored
 21:  * @property-read ISubmitterControl|FALSE $submitted
 22:  * @property-read bool $success
 23:  * @property-read array $httpData
 24:  * @property-read array $errors
 25:  * @property-read NHtml $elementPrototype
 26:  * @property   IFormRenderer $renderer
 27:  * @package Nette\Forms
 28:  */
 29: class NForm extends NFormContainer
 30: {
 31:     /** validator */
 32:     const EQUAL = ':equal',
 33:         IS_IN = ':equal',
 34:         NOT_EQUAL = ':notEqual',
 35:         FILLED = ':filled',
 36:         BLANK = ':blank',
 37:         REQUIRED = self::FILLED,
 38:         VALID = ':valid';
 39: 
 40:     // CSRF protection
 41:     const PROTECTION = 'NHiddenField::validateEqual';
 42: 
 43:     // button
 44:     const SUBMITTED = ':submitted';
 45: 
 46:     // text
 47:     const MIN_LENGTH = ':minLength',
 48:         MAX_LENGTH = ':maxLength',
 49:         LENGTH = ':length',
 50:         EMAIL = ':email',
 51:         URL = ':url',
 52:         REGEXP = ':regexp',
 53:         PATTERN = ':pattern',
 54:         INTEGER = ':integer',
 55:         NUMERIC = ':integer',
 56:         FLOAT = ':float',
 57:         RANGE = ':range';
 58: 
 59:     // multiselect
 60:     const COUNT = ':length';
 61: 
 62:     // file upload
 63:     const MAX_FILE_SIZE = ':fileSize',
 64:         MIME_TYPE = ':mimeType',
 65:         IMAGE = ':image';
 66: 
 67:     /** method */
 68:     const GET = 'get',
 69:         POST = 'post';
 70: 
 71:     /** @internal tracker ID */
 72:     const TRACKER_ID = '_form_';
 73: 
 74:     /** @internal protection token ID */
 75:     const PROTECTOR_ID = '_token_';
 76: 
 77:     /** @var array of function(Form $sender); Occurs when the form is submitted and successfully validated */
 78:     public $onSuccess;
 79: 
 80:     /** @var array of function(Form $sender); Occurs when the form is submitted and is not valid */
 81:     public $onError;
 82: 
 83:     /** @var array of function(Form $sender); Occurs when the form is submitted */
 84:     public $onSubmit;
 85: 
 86:     /** @deprecated */
 87:     public $onInvalidSubmit;
 88: 
 89:     /** @var mixed or NULL meaning: not detected yet */
 90:     private $submittedBy;
 91: 
 92:     /** @var array */
 93:     private $httpData;
 94: 
 95:     /** @var NHtml  <form> element */
 96:     private $element;
 97: 
 98:     /** @var IFormRenderer */
 99:     private $renderer;
100: 
101:     /** @var ITranslator */
102:     private $translator;
103: 
104:     /** @var NFormGroup[] */
105:     private $groups = array();
106: 
107:     /** @var array */
108:     private $errors = array();
109: 
110:     /** @var IHttpRequest  used only by standalone form */
111:     public $httpRequest;
112: 
113: 
114:     /**
115:      * Form constructor.
116:      * @param  string
117:      */
118:     public function __construct($name = NULL)
119:     {
120:         $this->element = NHtml::el('form');
121:         $this->element->action = ''; // RFC 1808 -> empty uri means 'this'
122:         $this->element->method = self::POST;
123:         $this->element->id = $name === NULL ? NULL : 'frm-' . $name;
124: 
125:         $this->monitor(__CLASS__);
126:         if ($name !== NULL) {
127:             $tracker = new NHiddenField($name);
128:             $tracker->unmonitor(__CLASS__);
129:             $this[self::TRACKER_ID] = $tracker;
130:         }
131:         parent::__construct(NULL, $name);
132:     }
133: 
134: 
135:     /**
136:      * This method will be called when the component (or component's parent)
137:      * becomes attached to a monitored object. Do not call this method yourself.
138:      * @param  IComponent
139:      * @return void
140:      */
141:     protected function attached($obj)
142:     {
143:         if ($obj instanceof self) {
144:             throw new InvalidStateException('Nested forms are forbidden.');
145:         }
146:     }
147: 
148: 
149:     /**
150:      * Returns self.
151:      * @return NForm
152:      */
153:     public function getForm($need = TRUE)
154:     {
155:         return $this;
156:     }
157: 
158: 
159:     /**
160:      * Sets form's action.
161:      * @param  mixed URI
162:      * @return self
163:      */
164:     public function setAction($url)
165:     {
166:         $this->element->action = $url;
167:         return $this;
168:     }
169: 
170: 
171:     /**
172:      * Returns form's action.
173:      * @return mixed URI
174:      */
175:     public function getAction()
176:     {
177:         return $this->element->action;
178:     }
179: 
180: 
181:     /**
182:      * Sets form's method.
183:      * @param  string get | post
184:      * @return self
185:      */
186:     public function setMethod($method)
187:     {
188:         if ($this->httpData !== NULL) {
189:             throw new InvalidStateException(__METHOD__ . '() must be called until the form is empty.');
190:         }
191:         $this->element->method = strtolower($method);
192:         return $this;
193:     }
194: 
195: 
196:     /**
197:      * Returns form's method.
198:      * @return string get | post
199:      */
200:     public function getMethod()
201:     {
202:         return $this->element->method;
203:     }
204: 
205: 
206:     /**
207:      * Cross-Site Request Forgery (CSRF) form protection.
208:      * @param  string
209:      * @param  int
210:      * @return void
211:      */
212:     public function addProtection($message = NULL, $timeout = NULL)
213:     {
214:         $session = $this->getSession()->getSection('Nette.Forms.Form/CSRF');
215:         $key = "key$timeout";
216:         if (isset($session->$key)) {
217:             $token = $session->$key;
218:         } else {
219:             $session->$key = $token = NStrings::random();
220:         }
221:         $session->setExpiration($timeout, $key);
222:         $token = base64_encode($token ^ $this->getSession()->getId());
223:         $this[self::PROTECTOR_ID] = new NHiddenField($token);
224:         $this[self::PROTECTOR_ID]->addRule(self::PROTECTION, $message, $token);
225:     }
226: 
227: 
228:     /**
229:      * Adds fieldset group to the form.
230:      * @param  string  caption
231:      * @param  bool    set this group as current
232:      * @return NFormGroup
233:      */
234:     public function addGroup($caption = NULL, $setAsCurrent = TRUE)
235:     {
236:         $group = new NFormGroup;
237:         $group->setOption('label', $caption);
238:         $group->setOption('visual', TRUE);
239: 
240:         if ($setAsCurrent) {
241:             $this->setCurrentGroup($group);
242:         }
243: 
244:         if (isset($this->groups[$caption])) {
245:             return $this->groups[] = $group;
246:         } else {
247:             return $this->groups[$caption] = $group;
248:         }
249:     }
250: 
251: 
252:     /**
253:      * Removes fieldset group from form.
254:      * @param  string|ControlGroup
255:      * @return void
256:      */
257:     public function removeGroup($name)
258:     {
259:         if (is_string($name) && isset($this->groups[$name])) {
260:             $group = $this->groups[$name];
261: 
262:         } elseif ($name instanceof NFormGroup && in_array($name, $this->groups, TRUE)) {
263:             $group = $name;
264:             $name = array_search($group, $this->groups, TRUE);
265: 
266:         } else {
267:             throw new InvalidArgumentException("Group not found in form '$this->name'");
268:         }
269: 
270:         foreach ($group->getControls() as $control) {
271:             $control->getParent()->removeComponent($control);
272:         }
273: 
274:         unset($this->groups[$name]);
275:     }
276: 
277: 
278:     /**
279:      * Returns all defined groups.
280:      * @return NFormGroup[]
281:      */
282:     public function getGroups()
283:     {
284:         return $this->groups;
285:     }
286: 
287: 
288:     /**
289:      * Returns the specified group.
290:      * @param  string  name
291:      * @return NFormGroup
292:      */
293:     public function getGroup($name)
294:     {
295:         return isset($this->groups[$name]) ? $this->groups[$name] : NULL;
296:     }
297: 
298: 
299:     /********************* translator ****************d*g**/
300: 
301: 
302:     /**
303:      * Sets translate adapter.
304:      * @return self
305:      */
306:     public function setTranslator(ITranslator $translator = NULL)
307:     {
308:         $this->translator = $translator;
309:         return $this;
310:     }
311: 
312: 
313:     /**
314:      * Returns translate adapter.
315:      * @return ITranslator|NULL
316:      */
317:     public function getTranslator()
318:     {
319:         return $this->translator;
320:     }
321: 
322: 
323:     /********************* submission ****************d*g**/
324: 
325: 
326:     /**
327:      * Tells if the form is anchored.
328:      * @return bool
329:      */
330:     public function isAnchored()
331:     {
332:         return TRUE;
333:     }
334: 
335: 
336:     /**
337:      * Tells if the form was submitted.
338:      * @return ISubmitterControl|FALSE  submittor control
339:      */
340:     public function isSubmitted()
341:     {
342:         if ($this->submittedBy === NULL) {
343:             $this->getHttpData();
344:         }
345:         return $this->submittedBy;
346:     }
347: 
348: 
349:     /**
350:      * Tells if the form was submitted and successfully validated.
351:      * @return bool
352:      */
353:     public function isSuccess()
354:     {
355:         return $this->isSubmitted() && $this->isValid();
356:     }
357: 
358: 
359:     /**
360:      * Sets the submittor control.
361:      * @return self
362:      */
363:     public function setSubmittedBy(ISubmitterControl $by = NULL)
364:     {
365:         $this->submittedBy = $by === NULL ? FALSE : $by;
366:         return $this;
367:     }
368: 
369: 
370:     /**
371:      * Returns submitted HTTP data.
372:      * @return array
373:      */
374:     public function getHttpData()
375:     {
376:         if ($this->httpData === NULL) {
377:             if (!$this->isAnchored()) {
378:                 throw new InvalidStateException('Form is not anchored and therefore can not determine whether it was submitted.');
379:             }
380:             $data = $this->receiveHttpData();
381:             $this->httpData = (array) $data;
382:             $this->submittedBy = is_array($data);
383:         }
384:         return $this->httpData;
385:     }
386: 
387: 
388:     /**
389:      * Fires submit/click events.
390:      * @return void
391:      */
392:     public function fireEvents()
393:     {
394:         if (!$this->isSubmitted()) {
395:             return;
396: 
397:         } elseif ($this->submittedBy instanceof ISubmitterControl) {
398:             if (!$this->submittedBy->getValidationScope() || $this->isValid()) {
399:                 $this->submittedBy->click();
400:                 $valid = TRUE;
401:             } else {
402:                 $this->submittedBy->onInvalidClick($this->submittedBy);
403:             }
404:         }
405: 
406:         if (isset($valid) || $this->isValid()) {
407:             $this->onSuccess($this);
408:         } else {
409:             $this->onError($this);
410:             if ($this->onInvalidSubmit) {
411:                 trigger_error(__CLASS__ . '->onInvalidSubmit is deprecated; use onError instead.', E_USER_WARNING);
412:                 $this->onInvalidSubmit($this);
413:             }
414:         }
415: 
416:         if ($this->onSuccess) { // back compatibility
417:             $this->onSubmit($this);
418:         } elseif ($this->onSubmit) {
419:             trigger_error(__CLASS__ . '->onSubmit changed its behavior; use onSuccess instead.', E_USER_WARNING);
420:             if (isset($valid) || $this->isValid()) {
421:                 $this->onSubmit($this);
422:             }
423:         }
424:     }
425: 
426: 
427:     /**
428:      * Internal: returns submitted HTTP data or NULL when form was not submitted.
429:      * @return array|NULL
430:      */
431:     protected function receiveHttpData()
432:     {
433:         $httpRequest = $this->getHttpRequest();
434:         if (strcasecmp($this->getMethod(), $httpRequest->getMethod())) {
435:             return;
436:         }
437: 
438:         if ($httpRequest->isMethod('post')) {
439:             $data = NArrays::mergeTree($httpRequest->getPost(), $httpRequest->getFiles());
440:         } else {
441:             $data = $httpRequest->getQuery();
442:             if (!$data) {
443:                 return;
444:             }
445:         }
446: 
447:         if ($tracker = $this->getComponent(self::TRACKER_ID, FALSE)) {
448:             if (!isset($data[self::TRACKER_ID]) || $data[self::TRACKER_ID] !== $tracker->getValue()) {
449:                 return;
450:             }
451:         }
452: 
453:         return $data;
454:     }
455: 
456: 
457:     /********************* data exchange ****************d*g**/
458: 
459: 
460:     /**
461:      * Returns the values submitted by the form.
462:      * @return NArrayHash|array
463:      */
464:     public function getValues($asArray = FALSE)
465:     {
466:         $values = parent::getValues($asArray);
467:         unset($values[self::TRACKER_ID], $values[self::PROTECTOR_ID]);
468:         return $values;
469:     }
470: 
471: 
472:     /********************* validation ****************d*g**/
473: 
474: 
475:     /**
476:      * Adds error message to the list.
477:      * @param  string  error message
478:      * @return void
479:      */
480:     public function addError($message)
481:     {
482:         $this->valid = FALSE;
483:         if ($message !== NULL && !in_array($message, $this->errors, TRUE)) {
484:             $this->errors[] = $message;
485:         }
486:     }
487: 
488: 
489:     /**
490:      * Returns validation errors.
491:      * @return array
492:      */
493:     public function getErrors()
494:     {
495:         return $this->errors;
496:     }
497: 
498: 
499:     /**
500:      * @return bool
501:      */
502:     public function hasErrors()
503:     {
504:         return (bool) $this->getErrors();
505:     }
506: 
507: 
508:     /**
509:      * @return void
510:      */
511:     public function cleanErrors()
512:     {
513:         $this->errors = array();
514:         $this->valid = NULL;
515:     }
516: 
517: 
518:     /********************* rendering ****************d*g**/
519: 
520: 
521:     /**
522:      * Returns form's HTML element template.
523:      * @return NHtml
524:      */
525:     public function getElementPrototype()
526:     {
527:         return $this->element;
528:     }
529: 
530: 
531:     /**
532:      * Sets form renderer.
533:      * @return self
534:      */
535:     public function setRenderer(IFormRenderer $renderer)
536:     {
537:         $this->renderer = $renderer;
538:         return $this;
539:     }
540: 
541: 
542:     /**
543:      * Returns form renderer.
544:      * @return IFormRenderer
545:      */
546:     public function getRenderer()
547:     {
548:         if ($this->renderer === NULL) {
549:             $this->renderer = new NDefaultFormRenderer;
550:         }
551:         return $this->renderer;
552:     }
553: 
554: 
555:     /**
556:      * Renders form.
557:      * @return void
558:      */
559:     public function render()
560:     {
561:         $args = func_get_args();
562:         array_unshift($args, $this);
563:         echo call_user_func_array(array($this->getRenderer(), 'render'), $args);
564:     }
565: 
566: 
567:     /**
568:      * Renders form to string.
569:      * @return can throw exceptions? (hidden parameter)
570:      * @return string
571:      */
572:     public function __toString()
573:     {
574:         try {
575:             return $this->getRenderer()->render($this);
576: 
577:         } catch (Exception $e) {
578:             if (func_num_args()) {
579:                 throw $e;
580:             }
581:             trigger_error("Exception in " . __METHOD__ . "(): {$e->getMessage()} in {$e->getFile()}:{$e->getLine()}", E_USER_ERROR);
582:         }
583:     }
584: 
585: 
586:     /********************* backend ****************d*g**/
587: 
588: 
589:     /**
590:      * @return IHttpRequest
591:      */
592:     protected function getHttpRequest()
593:     {
594:         if (!$this->httpRequest) {
595:             $factory = new NHttpRequestFactory;
596:             $this->httpRequest = $factory->setEncoding('UTF-8')->createHttpRequest();
597:         }
598:         return $this->httpRequest;
599:     }
600: 
601: 
602:     /**
603:      * @return NSession
604:      */
605:     protected function getSession()
606:     {
607:         if (!$this->httpRequest) {
608:             $this->httpRequest = NEnvironment::getHttpRequest();
609:         }
610:         return NEnvironment::getSession();
611:     }
612: 
613: }
614: