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- <?php
- /**
- * Base class for HTML_QuickForm2 rules
- *
- * PHP version 5
- *
- * LICENSE:
- *
- * Copyright (c) 2006, 2007, Alexey Borzov <avb@php.net>,
- * Bertrand Mansion <golgote@mamasam.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * The names of the authors may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * @category HTML
- * @package HTML_QuickForm2
- * @author Alexey Borzov <avb@php.net>
- * @author Bertrand Mansion <golgote@mamasam.com>
- * @license http://opensource.org/licenses/bsd-license.php New BSD License
- * @version CVS: $Id: Rule.php,v 1.3 2007/07/05 18:27:16 avb Exp $
- * @link http://pear.php.net/package/HTML_QuickForm2
- */
-
- /**
- * Abstract base class for HTML_QuickForm2 rules
- *
- * This class provides methods that allow chaining several rules together.
- * Its validate() method executes the whole rule chain starting from this rule.
- *
- * @category HTML
- * @package HTML_QuickForm2
- * @author Alexey Borzov <avb@php.net>
- * @author Bertrand Mansion <golgote@mamasam.com>
- * @version Release: 0.2.0
- */
- abstract class HTML_QuickForm2_Rule
- {
- /**
- * An element whose value will be validated by this rule
- * @var HTML_QuickForm2_Node
- */
- protected $owner;
-
- /**
- * An error message to display if validation fails
- * @var string
- */
- protected $message;
-
- /**
- * Additional data for the rule
- * @var mixed
- */
- protected $options;
-
- /**
- * Rules chained to this via "and" and "or" operators
- *
- * The contents can be described as "disjunctive normal form", where an outer
- * array represents a disjunction of conjunctive clauses represented by inner
- * arrays.
- *
- * @var array
- */
- protected $chainedRules = array(array());
-
- /**
- * Type that was provided to Factory when creating this Rule instance
- *
- * Used to get the common configuration data for the Rules of that type from
- * Factory.
- *
- * @var string
- */
- protected $registeredType = null;
-
-
- /**
- * Class constructor
- *
- * @param HTML_QuickForm2_Node Element to validate
- * @param string Error message to display if validation fails
- * @param mixed Additional data for the rule
- * @param string Type that was provided to Factory when
- * creating this Rule instance, shouldn't
- * be set if instantiating the Rule object
- * manually.
- */
- public function __construct(HTML_QuickForm2_Node $owner, $message = '',
- $options = null, $registeredType = null)
- {
- $this->setOwner($owner);
- $this->setMessage($message);
- $this->setOptions($options);
- $this->registeredType = $registeredType;
- }
-
- /**
- * Sets additional configuration data for the rule
- *
- * @param mixed Rule configuration data (rule-dependent)
- * @return HTML_QuickForm2_Rule
- */
- public function setOptions($options)
- {
- $this->options = $options;
- return $this;
- }
-
- /**
- * Returns the rule's configuration data
- *
- * @return mixed
- */
- public function getOptions()
- {
- return $this->options;
- }
-
- /**
- * Sets the error message output by the rule
- *
- * @param string Error message to display if validation fails
- * @return HTML_QuickForm2_Rule
- */
- public function setMessage($message)
- {
- $this->message = (string)$message;
- return $this;
- }
-
- /**
- * Returns the error message output by the rule
- *
- * @return string Error message
- */
- public function getMessage()
- {
- return $this->message;
- }
-
- /**
- * Sets the element that will be validated by this rule
- *
- * @param HTML_QuickForm2_Node Element to validate
- * @todo We should consider removing the rule from previous owner
- */
- public function setOwner(HTML_QuickForm2_Node $owner)
- {
- $this->owner = $owner;
- }
-
- /**
- * Adds a rule to the chain with an "and" operator
- *
- * Evaluation is short-circuited, next rule will not be evaluated if the
- * previous one returns false. The method is named this way because "and" is
- * a reserved word in PHP.
- *
- * @param HTML_QuickForm2_Rule
- * @return HTML_QuickForm2_Rule first rule in the chain (i.e. $this)
- * @throws HTML_QuickForm2_InvalidArgumentException when trying to add
- * a "required" rule to the chain
- */
- public function and_(HTML_QuickForm2_Rule $next)
- {
- if ($next instanceof HTML_QuickForm2_Rule_Required) {
- throw new HTML_QuickForm2_InvalidArgumentException(
- 'and_(): Cannot add a "required" rule'
- );
- }
- $this->chainedRules[count($this->chainedRules) - 1][] = $next;
- return $this;
- }
-
- /**
- * Adds a rule to the chain with an "or" operator
- *
- * Evaluation is short-circuited, next rule will not be evaluated if the
- * previous one returns true. The method is named this way because "or" is
- * a reserved word in PHP.
- *
- * @param HTML_QuickForm2_Rule
- * @return HTML_QuickForm2_Rule first rule in the chain (i.e. $this)
- * @throws HTML_QuickForm2_InvalidArgumentException when trying to add
- * a "required" rule to the chain
- */
- public function or_(HTML_QuickForm2_Rule $next)
- {
- if ($next instanceof HTML_QuickForm2_Rule_Required) {
- throw new HTML_QuickForm2_InvalidArgumentException(
- 'or_(): Cannot add a "required" rule'
- );
- }
- $this->chainedRules[] = array($next);
- return $this;
- }
-
- /**
- * Performs validation
- *
- * The whole rule chain is executed. Note that the side effect of this
- * method is setting the error message on element if validation fails
- *
- * @return boolean Whether the element is valid
- */
- public function validate()
- {
- $globalValid = false;
- $localValid = $this->checkValue($this->owner->getValue());
- foreach ($this->chainedRules as $item) {
- foreach ($item as $multiplier) {
- if (!$localValid) {
- break;
- }
- $localValid = $localValid && $multiplier->validate();
- }
- $globalValid = $globalValid || $localValid;
- if ($globalValid) {
- break;
- }
- $localValid = true;
- }
- if (!$globalValid && strlen($this->message) && !$this->owner->getError()) {
- $this->owner->setError($this->message);
- }
- return $globalValid;
- }
-
- /**
- * Validates the element's value
- *
- * Note that the error message will be set for an element if such message
- * exists in the rule and that method returns false
- *
- * @param mixed Form element's value
- * @return boolean Whether the value is valid according to the rule
- */
- abstract protected function checkValue($value);
- }
- ?>
-