QuestyCaptcha.class.php

   1 <?php
   2
   3 /**
   4  * QuestyCaptcha class
   5  *
   6  * @file
   7  * @author Benjamin Lees <emufarmers@gmail.com>
   8  * @ingroup Extensions
   9  */
  10
  11 class QuestyCaptcha extends SimpleCaptcha {
  12
  13         /** Validate a captcha response */
  14         function keyMatch( $answer, $info ) {
  15                 if ( is_array( $info['answer'] ) ) {
  16                         return in_array( strtolower( $answer ), $info['answer'] );
  17                 } else {
  18                         return strtolower( $answer ) == strtolower( $info['answer'] );
  19                 }
  20         }
  21
  22         function addCaptchaAPI( &$resultArr ) {
  23                 $captcha = $this->getCaptcha();
  24                 $index = $this->storeCaptcha( $captcha );
  25                 $resultArr['captcha']['type'] = 'question';
  26                 $resultArr['captcha']['mime'] = 'text/plain';
  27                 $resultArr['captcha']['id'] = $index;
  28                 $resultArr['captcha']['question'] = $captcha['question'];
  29         }
  30
  31         function getCaptcha() {
  32                 global $wgCaptchaQuestions;
  33                 return $wgCaptchaQuestions[mt_rand( 0, count( $wgCaptchaQuestions ) - 1 )]; // pick a question, any question
  34         }
  35
  36         function getForm() {
  37                 $captcha = $this->getCaptcha();
  38                 if ( !$captcha ) {
  39                         die( "No questions found; set some in LocalSettings.php using the format from QuestyCaptcha.php." );
  40                 }
  41                 $index = $this->storeCaptcha( $captcha );
  42                 return "<p><label for=\"wpCaptchaWord\">{$captcha['question']}</label> " .
  43                         Xml::element( 'input', array(
  44                                 'name' => 'wpCaptchaWord',
  45                                 'id'   => 'wpCaptchaWord',
  46                                 'tabindex' => 1 ) ) . // tab in before the edit textarea
  47                         "</p>\n" .
  48                         Xml::element( 'input', array(
  49                                 'type'  => 'hidden',
  50                                 'name'  => 'wpCaptchaId',
  51                                 'id'    => 'wpCaptchaId',
  52                                 'value' => $index ) );
  53         }
  54
  55         function getMessage( $action ) {
  56                 $name = 'questycaptcha-' . $action;
  57                 $text = wfMsg( $name );
  58                 # Obtain a more tailored message, if possible, otherwise, fall back to
  59                 # the default for edits
  60                 return wfEmptyMsg( $name, $text ) ? wfMsg( 'questycaptcha-edit' ) : $text;
  61         }
  62
  63         function showHelp() {
  64                 global $wgOut;
  65                 $wgOut->setPageTitle( wfMsg( 'captchahelp-title' ) );
  66                 $wgOut->addWikiText( wfMsg( 'questycaptchahelp-text' ) );
  67                 if ( $this->storage->cookiesNeeded() ) {
  68                         $wgOut->addWikiText( wfMsg( 'captchahelp-cookies-needed' ) );
  69                 }
  70         }
  71 }