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   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          $a = $values[0];
  75          $b = $values[1];
  76          if ($operator == '==') {
  77              return $a == $b;
  78          } else if ($operator == '!=') {
  79              return $a != $b;
  80          } else {
  81              // One of: <= , >= , < , > .
  82              return eval('return ' . floatval($a) . $operator . floatval($b) . ';');
  83          }
  84      }
  85  
  86  
  87      function getValidationScript($operator = null)
  88      {
  89          $operator = $this->_findOperator($operator);
  90          if ('==' != $operator && '!=' != $operator) {
  91              $check = "!(Number({jsVar}[0]) {$operator} Number({jsVar}[1]))";
  92          } else {
  93              $check = "!({jsVar}[0] {$operator} {jsVar}[1])";
  94          }
  95          return array('', "'' != {jsVar}[0] && {$check}");
  96      }
  97  }
  98  ?>