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:  * List of validation & condition rules.
 13:  *
 14:  * @author     David Grudl
 15:  * @package Nette\Forms
 16:  */
 17: class NRules extends NObject implements IteratorAggregate
 18: {
 19:     /** @internal */
 20:     const VALIDATE_PREFIX = 'validate';
 21: 
 22:     /** @var array */
 23:     public static $defaultMessages = array(
 24:         NForm::PROTECTION => 'Your session has expired. Please return to the home page and try again.',
 25:         NForm::EQUAL => 'Please enter %s.',
 26:         NForm::FILLED => 'Please complete mandatory field.',
 27:         NForm::MIN_LENGTH => 'Please enter a value of at least %d characters.',
 28:         NForm::MAX_LENGTH => 'Please enter a value no longer than %d characters.',
 29:         NForm::LENGTH => 'Please enter a value between %d and %d characters long.',
 30:         NForm::EMAIL => 'Please enter a valid email address.',
 31:         NForm::URL => 'Please enter a valid URL.',
 32:         NForm::INTEGER => 'Please enter a numeric value.',
 33:         NForm::FLOAT => 'Please enter a numeric value.',
 34:         NForm::RANGE => 'Please enter a value between %d and %d.',
 35:         NForm::MAX_FILE_SIZE => 'The size of the uploaded file can be up to %d bytes.',
 36:         NForm::IMAGE => 'The uploaded file must be image in format JPEG, GIF or PNG.',
 37:         NForm::MIME_TYPE => 'The uploaded file is not in the expected format.',
 38:     );
 39: 
 40:     /** @var NRule[] */
 41:     private $rules = array();
 42: 
 43:     /** @var NRules */
 44:     private $parent;
 45: 
 46:     /** @var array */
 47:     private $toggles = array();
 48: 
 49:     /** @var IFormControl */
 50:     private $control;
 51: 
 52: 
 53:     public function __construct(IFormControl $control)
 54:     {
 55:         $this->control = $control;
 56:     }
 57: 
 58: 
 59:     /**
 60:      * Adds a validation rule for the current control.
 61:      * @param  mixed      rule type
 62:      * @param  string     message to display for invalid data
 63:      * @param  mixed      optional rule arguments
 64:      * @return self
 65:      */
 66:     public function addRule($operation, $message = NULL, $arg = NULL)
 67:     {
 68:         $rule = new NRule;
 69:         $rule->control = $this->control;
 70:         $rule->operation = $operation;
 71:         $this->adjustOperation($rule);
 72:         $rule->arg = $arg;
 73:         $rule->type = NRule::VALIDATOR;
 74:         if ($message === NULL && is_string($rule->operation) && isset(self::$defaultMessages[$rule->operation])) {
 75:             $rule->message = self::$defaultMessages[$rule->operation];
 76:         } else {
 77:             $rule->message = $message;
 78:         }
 79:         $this->rules[] = $rule;
 80:         return $this;
 81:     }
 82: 
 83: 
 84:     /**
 85:      * Adds a validation condition a returns new branch.
 86:      * @param  mixed      condition type
 87:      * @param  mixed      optional condition arguments
 88:      * @return NRules      new branch
 89:      */
 90:     public function addCondition($operation, $arg = NULL)
 91:     {
 92:         return $this->addConditionOn($this->control, $operation, $arg);
 93:     }
 94: 
 95: 
 96:     /**
 97:      * Adds a validation condition on specified control a returns new branch.
 98:      * @param  IFormControl form control
 99:      * @param  mixed      condition type
100:      * @param  mixed      optional condition arguments
101:      * @return NRules      new branch
102:      */
103:     public function addConditionOn(IFormControl $control, $operation, $arg = NULL)
104:     {
105:         $rule = new NRule;
106:         $rule->control = $control;
107:         $rule->operation = $operation;
108:         $this->adjustOperation($rule);
109:         $rule->arg = $arg;
110:         $rule->type = NRule::CONDITION;
111:         $rule->subRules = new self($this->control);
112:         $rule->subRules->parent = $this;
113: 
114:         $this->rules[] = $rule;
115:         return $rule->subRules;
116:     }
117: 
118: 
119:     /**
120:      * Adds a else statement.
121:      * @return NRules      else branch
122:      */
123:     public function elseCondition()
124:     {
125:         $rule = clone end($this->parent->rules);
126:         $rule->isNegative = !$rule->isNegative;
127:         $rule->subRules = new self($this->parent->control);
128:         $rule->subRules->parent = $this->parent;
129:         $this->parent->rules[] = $rule;
130:         return $rule->subRules;
131:     }
132: 
133: 
134:     /**
135:      * Ends current validation condition.
136:      * @return NRules      parent branch
137:      */
138:     public function endCondition()
139:     {
140:         return $this->parent;
141:     }
142: 
143: 
144:     /**
145:      * Toggles HTML elememnt visibility.
146:      * @param  string     element id
147:      * @param  bool       hide element?
148:      * @return self
149:      */
150:     public function toggle($id, $hide = TRUE)
151:     {
152:         $this->toggles[$id] = $hide;
153:         return $this;
154:     }
155: 
156: 
157:     /**
158:      * Validates against ruleset.
159:      * @param  bool    stop before first error?
160:      * @return bool    is valid?
161:      */
162:     public function validate($onlyCheck = FALSE)
163:     {
164:         foreach ($this->rules as $rule) {
165:             if ($rule->control->isDisabled()) {
166:                 continue;
167:             }
168: 
169:             $success = ($rule->isNegative xor $this->getCallback($rule)->invoke($rule->control, $rule->arg));
170: 
171:             if ($rule->type === NRule::CONDITION && $success) {
172:                 if (!$rule->subRules->validate($onlyCheck)) {
173:                     return FALSE;
174:                 }
175: 
176:             } elseif ($rule->type === NRule::VALIDATOR && !$success) {
177:                 if (!$onlyCheck) {
178:                     $rule->control->addError(self::formatMessage($rule, TRUE));
179:                 }
180:                 return FALSE;
181:             }
182:         }
183:         return TRUE;
184:     }
185: 
186: 
187:     /**
188:      * Iterates over ruleset.
189:      * @return ArrayIterator
190:      */
191:     public function getIterator()
192:     {
193:         return new ArrayIterator($this->rules);
194:     }
195: 
196: 
197:     /**
198:      * @return array
199:      */
200:     public function getToggles()
201:     {
202:         return $this->toggles;
203:     }
204: 
205: 
206:     /**
207:      * Process 'operation' string.
208:      * @param  NRule
209:      * @return void
210:      */
211:     private function adjustOperation($rule)
212:     {
213:         if (is_string($rule->operation) && ord($rule->operation[0]) > 127) {
214:             $rule->isNegative = TRUE;
215:             $rule->operation = ~$rule->operation;
216:         }
217: 
218:         if (!$this->getCallback($rule)->isCallable()) {
219:             $operation = is_scalar($rule->operation) ? " '$rule->operation'" : '';
220:             throw new InvalidArgumentException("Unknown operation$operation for control '{$rule->control->getName()}'.");
221:         }
222:     }
223: 
224: 
225:     private function getCallback($rule)
226:     {
227:         $op = $rule->operation;
228:         if (is_string($op) && strncmp($op, ':', 1) === 0) {
229:             return new NCallback(get_class($rule->control), self::VALIDATE_PREFIX . ltrim($op, ':'));
230:         } else {
231:             return new NCallback($op);
232:         }
233:     }
234: 
235: 
236:     public static function formatMessage($rule, $withValue)
237:     {
238:         $message = $rule->message;
239:         if ($message instanceof NHtml) {
240:             return $message;
241:         }
242:         if ($message == NULL) { // intentionally ==
243:             trigger_error("Missing validation message for control '{$rule->control->getName()}'.", E_USER_WARNING);
244:         }
245:         if ($translator = $rule->control->getForm()->getTranslator()) {
246:             $message = $translator->translate($message, is_int($rule->arg) ? $rule->arg : NULL);
247:         }
248:         $message = vsprintf(preg_replace('#%(name|label|value)#', '%$0', $message), (array) $rule->arg);
249:         $message = str_replace('%name', $rule->control->getName(), $message);
250:         $message = str_replace('%label', $rule->control->translate($rule->control->caption), $message);
251:         if ($withValue && strpos($message, '%value') !== FALSE) {
252:             $message = str_replace('%value', $rule->control->getValue(), $message);
253:         }
254:         return $message;
255:     }
256: 
257: }
258: