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<?php
/**
* Rule comparing the value of the field with some other value
*
* PHP version 5
*
* LICENSE:
*
* Copyright (c) 2006-2014, 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
* @link http://pear.php.net/package/HTML_QuickForm2
*/
/**
* Base class for HTML_QuickForm2 rules
*/
require_once 'HTML/QuickForm2/Rule.php';
/**
* Rule comparing the value of the field with some other value
*
* The Rule needs two configuration parameters for its work
* - comparison operator (defaults to equality)
* - operand to compare with; this can be either a constant or another form
* element (its value will be used)
* See {@link mergeConfig()} for description of possible ways to pass
* configuration parameters.
*
* Note that 'less than [or equal]' and 'greater than [or equal]' operators
* compare the operands numerically, since this is considered as more useful
* approach by the authors.
*
* For convenience, this Rule is already registered in the Factory with the
* names 'eq', 'neq', 'lt', 'gt', 'lte', 'gte' corresponding to the relevant
* operators:
* <code>
* $password->addRule('eq', 'Passwords do not match', $passwordRepeat);
* $orderQty->addRule('lte', 'Should not order more than 10 of these', 10);
* </code>
*
* @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 Release: 2.0.2
* @link http://pear.php.net/package/HTML_QuickForm2
*/
class HTML_QuickForm2_Rule_Compare extends HTML_QuickForm2_Rule
{
/**
* Possible comparison operators
* @var array
*/
protected $operators = array('==', '!=', '===', '!==', '<', '<=', '>', '>=');
/**
* Validates the owner element
*
* @return bool whether (element_value operator operand) expression is true
*/
protected function validateOwner()
{
$value = $this->owner->getValue();
$config = $this->getConfig();
if (!in_array($config['operator'], array('===', '!=='))) {
$compareFn = create_function(
'$a, $b', 'return floatval($a) ' . $config['operator'] . ' floatval($b);'
);
} else {
$compareFn = create_function(
'$a, $b', 'return strval($a) ' . $config['operator'] . ' strval($b);'
);
}
return $compareFn($value, $config['operand'] instanceof HTML_QuickForm2_Node
? $config['operand']->getValue(): $config['operand']);
}
protected function getJavascriptCallback()
{
HTML_QuickForm2_Loader::loadClass('HTML_QuickForm2_JavascriptBuilder');
$config = $this->getConfig();
$operand1 = $this->owner->getJavascriptValue();
$operand2 = $config['operand'] instanceof HTML_QuickForm2_Node
? $config['operand']->getJavascriptValue()
: HTML_QuickForm2_JavascriptBuilder::encode($config['operand']);
if (!in_array($config['operator'], array('===', '!=='))) {
$check = "Number({$operand1}) {$config['operator']} Number({$operand2})";
} else {
$check = "String({$operand1}) {$config['operator']} String({$operand2})";
}
return "function () { return {$check}; }";
}
protected function getOwnJavascriptTriggers()
{
$triggers = $this->owner->getJavascriptTriggers();
$config = $this->getConfig();
if ($config['operand'] instanceof HTML_QuickForm2_Node) {
$triggers = array_merge($triggers, $config['operand']->getJavascriptTriggers());
}
return $triggers;
}
/**
* Merges local configuration with that provided for registerRule()
*
* "Global" configuration may be passed to
* {@link HTML_QuickForm2_Factory::registerRule()} in
* either of the following formats
* - operator
* - array(operator[, operand])
* - array(['operator' => operator, ]['operand' => operand])
* "Local" configuration may be passed to the constructor in either of
* the following formats
* - operand
* - array([operator, ]operand)
* - array(['operator' => operator, ]['operand' => operand])
*
* As usual, global configuration overrides local one.
*
* @param mixed $localConfig Local configuration
* @param mixed $globalConfig Global configuration
*
* @return mixed Merged configuration
*/
public static function mergeConfig($localConfig, $globalConfig)
{
$config = null;
if (0 < count($globalConfig)) {
$config = self::toCanonicalForm($globalConfig, 'operator');
}
if (0 < count($localConfig)) {
$config = (isset($config)? $config: array())
+ self::toCanonicalForm($localConfig);
}
return $config;
}
/**
* Converts configuration data to a canonical associative array form
*
* @param mixed $config Configuration data
* @param string $key Array key to assign $config to if it is scalar
*
* @return array Associative array that may contain 'operand' and 'operator' keys
*/
protected static function toCanonicalForm($config, $key = 'operand')
{
if (!is_array($config)) {
return array($key => $config);
} elseif (array_key_exists('operator', $config)
|| array_key_exists('operand', $config)
) {
return $config;
} elseif (1 == count($config)) {
return array($key => end($config));
} else {
return array('operator' => reset($config), 'operand' => end($config));
}
}
/**
* Sets the comparison operator and operand to compare to
*
* $config can be either of the following
* - operand
* - array([operator, ]operand)
* - array(['operator' => operator, ]['operand' => operand])
* If operator is missing it will default to '==='
*
* @param mixed $config Configuration data
*
* @return HTML_QuickForm2_Rule
* @throws HTML_QuickForm2_InvalidArgumentException if a bogus comparison
* operator is used for configuration, if an operand is missing
*/
public function setConfig($config)
{
if (0 == count($config)) {
throw new HTML_QuickForm2_InvalidArgumentException(
'Compare Rule requires an argument to compare with'
);
}
$config = self::toCanonicalForm($config);
$config += array('operator' => '===');
if (!in_array($config['operator'], $this->operators)) {
throw new HTML_QuickForm2_InvalidArgumentException(
'Compare Rule requires a valid comparison operator, ' .
preg_replace('/\s+/', ' ', var_export($config['operator'], true)) . ' given'
);
}
if (in_array($config['operator'], array('==', '!='))) {
$config['operator'] .= '=';
}
return parent::setConfig($config);
}
}
?>
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