173 lines
6.6 KiB
PHP
173 lines
6.6 KiB
PHP
<?php
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/**
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* Rule checking the value via a callback function (method)
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*
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* PHP version 5
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*
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* LICENSE:
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*
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* Copyright (c) 2006-2010, Alexey Borzov <avb@php.net>,
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* Bertrand Mansion <golgote@mamasam.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * The names of the authors may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @category HTML
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* @package HTML_QuickForm2
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* @author Alexey Borzov <avb@php.net>
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* @author Bertrand Mansion <golgote@mamasam.com>
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* @license http://opensource.org/licenses/bsd-license.php New BSD License
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* @version SVN: $Id: Callback.php 294057 2010-01-26 21:10:28Z avb $
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* @link http://pear.php.net/package/HTML_QuickForm2
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*/
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/**
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* Base class for HTML_QuickForm2 rules
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*/
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// require_once 'HTML/QuickForm2/Rule.php';
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/**
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* Rule checking the value via a callback function (method)
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*
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* The Rule needs a valid callback as a configuration parameter for its work, it
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* may also be given additional arguments to pass to the callback alongside the
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* element's value. See {@link mergeConfig()} for description of possible ways
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* to pass configuration parameters.
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*
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* The callback will be called with element's value as the first argument, if
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* additional arguments were provided they'll be passed as well. It is expected
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* to return false if the value is invalid and true if it is valid.
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*
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* Checking that the value is not empty:
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* <code>
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* $str->addRule('callback', 'The field should not be empty', 'strlen');
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* </code>
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* Checking that the value is in the given array:
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* <code>
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* $meta->addRule('callback', 'Unknown variable name',
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* array('callback' => 'in_array',
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* 'arguments' => array(array('foo', 'bar', 'baz'))));
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* </code>
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* The same, but with rule registering first:
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* <code>
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* HTML_QuickForm2_Factory::registerRule(
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* 'in_array', 'HTML_QuickForm2_Rule_Callback',
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* 'HTML/QuickForm2/Rule/Callback.php', 'in_array'
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* );
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* $meta->addRule('in_array', 'Unknown variable name', array(array('foo', 'bar', 'baz')));
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* </code>
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*
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* @category HTML
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* @package HTML_QuickForm2
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* @author Alexey Borzov <avb@php.net>
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* @author Bertrand Mansion <golgote@mamasam.com>
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* @version Release: @package_version@
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*/
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class HTML_QuickForm2_Rule_Callback extends HTML_QuickForm2_Rule
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{
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/**
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* Validates the owner element
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*
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* @return bool the value returned by a callback function
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*/
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protected function validateOwner()
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{
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$value = $this->owner->getValue();
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$config = $this->getConfig();
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return (bool)call_user_func_array(
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$config['callback'], array_merge(array($value), $config['arguments'])
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);
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}
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/**
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* Merges local configuration with that provided for registerRule()
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*
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* "Global" configuration may be passed to
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* {@link HTML_QuickForm2_Factory::registerRule()} in either of the
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* following formats
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* - callback
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* - array(['callback' => callback, ]['arguments' => array(...)])
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*
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* "Local" configuration may be passed to the constructor in either of
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* the following formats
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* - callback or arguments (interpretation depends on whether the global
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* configuration already contains the callback)
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* - array(['callback' => callback, ]['arguments' => array(...)])
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*
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* As usual, global config overrides local one. It is a good idea to use the
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* associative array format to prevent ambiguity.
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*
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* @param mixed Local configuration
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* @param mixed Global configuration
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* @return mixed Merged configuration
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*/
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public static function mergeConfig($localConfig, $globalConfig)
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{
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if (!isset($globalConfig)) {
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$config = $localConfig;
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} else {
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if (!is_array($globalConfig) ||
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!isset($globalConfig['callback']) && !isset($globalConfig['arguments'])
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) {
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$config = array('callback' => $globalConfig);
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} else {
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$config = $globalConfig;
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}
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if (is_array($localConfig) && (isset($localConfig['callback'])
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|| isset($localConfig['arguments']))
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) {
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$config += $localConfig;
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} elseif(isset($localConfig)) {
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$config += array('callback' => $localConfig, 'arguments' => $localConfig);
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}
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}
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return $config;
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}
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/**
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* Sets the callback to use for validation and its additional arguments
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*
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* @param callback|array Callback or array ('callback' => validation callback,
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* 'arguments' => additional arguments)
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* @return HTML_QuickForm2_Rule
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* @throws HTML_QuickForm2_InvalidArgumentException if callback is missing or invalid
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*/
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public function setConfig($config)
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{
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if (!is_array($config) || !isset($config['callback'])) {
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$config = array('callback' => $config);
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}
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if (!is_callable($config['callback'], false, $callbackName)) {
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throw new HTML_QuickForm2_InvalidArgumentException(
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'Callback Rule requires a valid callback, \'' . $callbackName .
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'\' was given'
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);
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}
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return parent::setConfig($config + array('arguments' => array()));
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}
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}
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?>
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