ruleregistry.php

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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**
 * Registers rule objects and uses them for validation
 * 
 * PHP versions 4 and 5
 *
 * LICENSE: This source file is subject to version 3.01 of the PHP license
 * that is available through the world-wide-web at the following URI:
 * http://www.php.net/license/3_01.txt If you did not receive a copy of
 * the PHP License and are unable to obtain it through the web, please
 * send a note to [e-mail] so we can mail you a copy immediately.
 *
 * @category    HTML
 * @package     HTML_QuickForm
 * @author      Adam Daniel <[e-mail]>
 * @author      Bertrand Mansion <[e-mail]>
 * @author      Alexey Borzov <[e-mail]>
 * @copyright   2001-2007 The PHP Group
 * @license     http://www.php.net/license/3_01.txt PHP License 3.01
 * @version     CVS: $Id: RuleRegistry.php 444 2008-04-11 13:38:22Z johmathe $
 * @link        http://pear.php.net/package/HTML_QuickForm
 */

/**
 * Registers rule objects and uses them for validation
 *
 * @category    HTML
 * @package     HTML_QuickForm
 * @author      Adam Daniel <[e-mail]>
 * @author      Bertrand Mansion <[e-mail]>
 * @author      Alexey Borzov <[e-mail]>
 * @version     Release: 3.2.9
 * @since       3.2
 */
class HTML_QuickForm_RuleRegistry
{
    /**
     * Array containing references to used rules
     * @var     array
     * @access  private
     */
    var $_rules = array();


    /**
     * Returns a singleton of HTML_QuickForm_RuleRegistry
     *
     * Usually, only one RuleRegistry object is needed, this is the reason
     * why it is recommended to use this method to get the validation object. 
     *
     * @access    public
     * @static
     * @return    HTML_QuickForm_RuleRegistry
     */
    static function &singleton()
    {
        static $obj;
        if (!isset($obj)) {
            $obj = new HTML_QuickForm_RuleRegistry();
        }
        return $obj;
    } // end func singleton

    /**
     * Registers a new validation rule
     *
     * In order to use a custom rule in your form, you need to register it
     * first. For regular expressions, one can directly use the 'regex' type
     * rule in addRule(), this is faster than registering the rule.
     *
     * Functions and methods can be registered. Use the 'function' type.
     * When registering a method, specify the class name as second parameter.
     *
     * You can also register an HTML_QuickForm_Rule subclass with its own
     * validate() method.
     *
     * @param     string    $ruleName   Name of validation rule
     * @param     string    $type       Either: 'regex', 'function' or null
     * @param     string    $data1      Name of function, regular expression or
     *                                  HTML_QuickForm_Rule object class name
     * @param     string    $data2      Object parent of above function or HTML_QuickForm_Rule file path
     * @access    public
     * @return    void
     */
    function registerRule($ruleName, $type, $data1, $data2 = null)
    {
        $type = strtolower($type);
        if ($type == 'regex') {
            // Regular expression
            $rule =& $this->getRule('regex');
            $rule->addData($ruleName, $data1);
            $GLOBALS['_HTML_QuickForm_registered_rules'][$ruleName] = $GLOBALS['_HTML_QuickForm_registered_rules']['regex'];

        } elseif ($type == 'function' || $type == 'callback') {
            // Callback function
            $rule =& $this->getRule('callback');
            $rule->addData($ruleName, $data1, $data2, 'function' == $type);
            $GLOBALS['_HTML_QuickForm_registered_rules'][$ruleName] = $GLOBALS['_HTML_QuickForm_registered_rules']['callback'];

        } elseif (is_object($data1)) {
            // An instance of HTML_QuickForm_Rule
            $this->_rules[strtolower(get_class($data1))] = $data1;
            $GLOBALS['_HTML_QuickForm_registered_rules'][$ruleName] = array(strtolower(get_class($data1)), null);

        } else {
            // Rule class name
            $GLOBALS['_HTML_QuickForm_registered_rules'][$ruleName] = array(strtolower($data1), $data2);
        }
    } // end func registerRule

    /**
     * Returns a reference to the requested rule object
     *
     * @param     string   $ruleName        Name of the requested rule
     * @access    public
     * @return    HTML_QuickForm_Rule
     */
    function &getRule($ruleName)
    {
        list($class, $path) = $GLOBALS['_HTML_QuickForm_registered_rules'][$ruleName];

        if (!isset($this->_rules[$class])) {
            if (!empty($path)) {
                include_once($path);
            }
            $this->_rules[$class] = new $class();
        }
        $this->_rules[$class]->setName($ruleName);
        return $this->_rules[$class];
    } // end func getRule

    /**
     * Performs validation on the given values
     *
     * @param     string   $ruleName        Name of the rule to be used
     * @param     mixed    $values          Can be a scalar or an array of values 
     *                                      to be validated
     * @param     mixed    $options         Options used by the rule
     * @param     mixed    $multiple        Whether to validate an array of values altogether
     * @access    public
     * @return    mixed    true if no error found, int of valid values (when an array of values is given) or false if error
     */
    function validate($ruleName, $values, $options = null, $multiple = false)
    {
        $rule =& $this->getRule($ruleName);

        if (is_array($values) && !$multiple) {
            $result = 0;
            foreach ($values as $value) {
                if ($rule->validate($value, $options) === true) {
                    $result++;
                }
            }
            return ($result == 0) ? false : $result;
        } else {
            return $rule->validate($values, $options);
        }
    } // end func validate

    /**
     * Returns the validation test in javascript code
     *
     * @param     array|HTML_QuickForm_element  Element(s) the rule applies to
     * @param     string                        Element name, in case $element is 
     *                                          not an array
     * @param     array                         Rule data
     * @access    public
     * @return    string    JavaScript for the rule
     */
    function getValidationScript(&$element, $elementName, $ruleData)
    {
        $reset =  (isset($ruleData['reset'])) ? $ruleData['reset'] : false;
        $rule  =& $this->getRule($ruleData['type']);