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<?php
/**
* Rule checking the value's length
*
* 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 checking the value's length
*
* The rule needs an "allowed length" parameter for its work, it can be either
* - a scalar: the value will be valid if it is exactly this long
* - an array: the value will be valid if its length is between the given values
* (inclusive). If one of these evaluates to 0, then length will be compared
* only with the remaining one.
* See {@link mergeConfig()} for description of possible ways to pass
* configuration parameters.
*
* The Rule considers empty fields as valid and doesn't try to compare their
* lengths with provided limits.
*
* For convenience this Rule is also registered with the names 'minlength' and
* 'maxlength' (having, respectively, 'max' and 'min' parameters set to 0):
* <code>
* $password->addRule('minlength', 'The password should be at least 6 characters long', 6);
* $message->addRule('maxlength', 'Your message is too verbose', 1000);
* </code>
*
* @category HTML
* @package HTML_QuickForm2
* @author Alexey Borzov <avb@php.net>
* @author Bertrand Mansion <golgote@mamasam.com>
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @version Release: 2.0.2
* @link http://pear.php.net/package/HTML_QuickForm2
*/
class HTML_QuickForm2_Rule_Length extends HTML_QuickForm2_Rule
{
/**
* Validates the owner element
*
* @return bool whether length of the element's value is within allowed range
*/
protected function validateOwner()
{
if (0 == ($valueLength = strlen($this->owner->getValue()))) {
return true;
}
$allowedLength = $this->getConfig();
if (is_scalar($allowedLength)) {
return $valueLength == $allowedLength;
} else {
return (empty($allowedLength['min']) || $valueLength >= $allowedLength['min']) &&
(empty($allowedLength['max']) || $valueLength <= $allowedLength['max']);
}
}
protected function getJavascriptCallback()
{
$allowedLength = $this->getConfig();
if (is_scalar($allowedLength)) {
$check = "length == {$allowedLength}";
} else {
$checks = array();
if (!empty($allowedLength['min'])) {
$checks[] = "length >= {$allowedLength['min']}";
}
if (!empty($allowedLength['max'])) {
$checks[] = "length <= {$allowedLength['max']}";
}
$check = implode(' && ', $checks);
}
return "function() { var length = " . $this->owner->getJavascriptValue() .
".length; return qf.rules.empty(length) || ({$check}); }";
}
/**
* Adds the 'min' and 'max' fields from one array to the other
*
* @param array $length Rule configuration, array with 'min' and 'max' keys
* @param array $config Additional configuration, fields will be added to
* $length if it doesn't contain such a key already
*
* @return array
*/
protected static function mergeMinMaxLength($length, $config)
{
if (array_key_exists('min', $config) || array_key_exists('max', $config)) {
if (!array_key_exists('min', $length) && array_key_exists('min', $config)) {
$length['min'] = $config['min'];
}
if (!array_key_exists('max', $length) && array_key_exists('max', $config)) {
$length['max'] = $config['max'];
}
} else {
if (!array_key_exists('min', $length)) {
$length['min'] = reset($config);
}
if (!array_key_exists('max', $length)) {
$length['max'] = end($config);
}
}
return $length;
}
/**
* Merges length limits given on rule creation with those given to registerRule()
*
* "Global" length limits may be passed to
* {@link HTML_QuickForm2_Factory::registerRule()} in either of the
* following formats
* - scalar (exact length)
* - array(minlength, maxlength)
* - array(['min' => minlength, ]['max' => maxlength])
*
* "Local" length limits may be passed to the constructor in either of
* the following formats
* - scalar (if global config is unset then it is treated as an exact
* length, if 'min' or 'max' is in global config then it is treated
* as 'max' or 'min', respectively)
* - array(minlength, maxlength)
* - array(['min' => minlength, ]['max' => maxlength])
*
* As usual, global configuration overrides local one.
*
* @param int|array $localConfig Local length limits
* @param int|array $globalConfig Global length limits, usually provided to
* {@link HTML_QuickForm2_Factory::registerRule()}
*
* @return int|array Merged length limits
*/
public static function mergeConfig($localConfig, $globalConfig)
{
if (!isset($globalConfig)) {
$length = $localConfig;
} elseif (!is_array($globalConfig)) {
$length = $globalConfig;
} else {
$length = self::mergeMinMaxLength(array(), $globalConfig);
if (isset($localConfig)) {
$length = self::mergeMinMaxLength(
$length, is_array($localConfig)? $localConfig: array($localConfig)
);
}
}
return $length;
}
/**
* Sets the allowed length limits
*
* $config can be either of the following
* - integer (rule checks for exact length)
* - array(minlength, maxlength)
* - array(['min' => minlength, ]['max' => maxlength])
*
* @param int|array $config Length limits
*
* @return HTML_QuickForm2_Rule
* @throws HTML_QuickForm2_InvalidArgumentException if bogus length limits
* were provided
*/
public function setConfig($config)
{
if (is_array($config)) {
$config = self::mergeMinMaxLength(array(), $config)
+ array('min' => 0, 'max' => 0);
}
if (is_array($config) && ($config['min'] < 0 || $config['max'] < 0)
|| !is_array($config) && $config < 0
) {
throw new HTML_QuickForm2_InvalidArgumentException(
'Length Rule requires limits to be nonnegative, ' .
preg_replace('/\s+/', ' ', var_export($config, true)) . ' given'
);
} elseif (is_array($config) && $config['min'] == 0 && $config['max'] == 0
|| !is_array($config) && 0 == $config
) {
throw new HTML_QuickForm2_InvalidArgumentException(
'Length Rule requires at least one non-zero limit, ' .
preg_replace('/\s+/', ' ', var_export($config, true)) . ' given'
);
}
if (!empty($config['min']) && !empty($config['max'])) {
if ($config['min'] > $config['max']) {
list($config['min'], $config['max']) = array($config['max'], $config['min']);
} elseif ($config['min'] == $config['max']) {
$config = $config['min'];
}
}
return parent::setConfig($config);
}
}
?>
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