lib/pear/HTML/QuickForm/Rule/Compare.php

   1 <?php
   2 /* vim: set expandtab tabstop=4 shiftwidth=4: */
   3 // +----------------------------------------------------------------------+
   4 // | PHP version 4.0                                                      |
   5 // +----------------------------------------------------------------------+
   6 // | Copyright (c) 1997-2003 The PHP Group                                |
   7 // +----------------------------------------------------------------------+
   8 // | This source file is subject to version 2.0 of the PHP license,       |
   9 // | that is bundled with this package in the file LICENSE, and is        |
  10 // | available at through the world-wide-web at                           |
  11 // | http://www.php.net/license/2_02.txt.                                 |
  12 // | If you did not receive a copy of the PHP license and are unable to   |
  13 // | obtain it through the world-wide-web, please send a note to          |
  14 // | license@php.net so we can mail you a copy immediately.               |
  15 // +----------------------------------------------------------------------+
  16 // | Author: Alexey Borzov <avb@php.net>                                  |
  17 // +----------------------------------------------------------------------+
  18 //
  19 // $Id$
  20
  21 require_once 'HTML/QuickForm/Rule.php';
  22
  23 /**
  24  * Rule to compare two form fields
  25  *
  26  * The most common usage for this is to ensure that the password
  27  * confirmation field matches the password field
  28  *
  29  * @access public
  30  * @package HTML_QuickForm
  31  * @version $Revision$
  32  */
  33 class HTML_QuickForm_Rule_Compare extends HTML_QuickForm_Rule
  34 {
  35    /**
  36     * Possible operators to use
  37     * @var array
  38     * @access private
  39     */
  40     var $_operators = array(
  41         'eq'  => '==',
  42         'neq' => '!=',
  43         'gt'  => '>',
  44         'gte' => '>=',
  45         'lt'  => '<',
  46         'lte' => '<='
  47     );
  48
  49
  50    /**
  51     * Returns the operator to use for comparing the values
  52     *
  53     * @access private
  54     * @param  string     operator name
  55     * @return string     operator to use for validation
  56     */
  57     function _findOperator($name)
  58     {
  59         if (empty($name)) {
  60             return '==';
  61         } elseif (isset($this->_operators[$name])) {
  62             return $this->_operators[$name];
  63         } elseif (in_array($name, $this->_operators)) {
  64             return $name;
  65         } else {
  66             return '==';
  67         }
  68     }
  69
  70
  71     function validate($values, $operator = null)
  72     {
  73         $operator = $this->_findOperator($operator);
  74         if ('==' != $operator && '!=' != $operator) {
  75             $compareFn = create_function('$a, $b', 'return floatval($a) ' . $operator . ' floatval($b);');
  76         } else {
  77             $compareFn = create_function('$a, $b', 'return $a ' . $operator . ' $b;');
  78         }
  79
  80         return $compareFn($values[0], $values[1]);
  81     }
  82
  83
  84     function getValidationScript($operator = null)
  85     {
  86         $operator = $this->_findOperator($operator);
  87         if ('==' != $operator && '!=' != $operator) {
  88             $check = "!(Number({jsVar}[0]) {$operator} Number({jsVar}[1]))";
  89         } else {
  90             $check = "!({jsVar}[0] {$operator} {jsVar}[1])";
  91         }
  92         return array('', "'' != {jsVar}[0] && {$check}");
  93     }
  94 }
  95 ?>