extensions/ConfirmEdit/QuestyCaptcha/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 use MediaWiki\Auth\AuthenticationRequest;
  12
  13 class QuestyCaptcha extends SimpleCaptcha {
  14         // used for questycaptcha-edit, questycaptcha-addurl, questycaptcha-badlogin,
  15         // questycaptcha-createaccount, questycaptcha-create, questycaptcha-sendemail via getMessage()
  16         protected static $messagePrefix = 'questycaptcha-';
  17
  18         /**
  19          * Validate a captcha response
  20          * @param string $answer
  21          * @param array $info
  22          * @return bool
  23          */
  24         function keyMatch( $answer, $info ) {
  25                 if ( is_array( $info['answer'] ) ) {
  26                         return in_array( strtolower( $answer ), array_map( 'strtolower', $info['answer'] ) );
  27                 } else {
  28                         return strtolower( $answer ) == strtolower( $info['answer'] );
  29                 }
  30         }
  31
  32         /**
  33          * @param array $resultArr
  34          */
  35         function addCaptchaAPI( &$resultArr ) {
  36                 $captcha = $this->getCaptcha();
  37                 $index = $this->storeCaptcha( $captcha );
  38                 $resultArr['captcha'] = $this->describeCaptchaType();
  39                 $resultArr['captcha']['id'] = $index;
  40                 $resultArr['captcha']['question'] = $captcha['question'];
  41         }
  42
  43         /**
  44          * @return array
  45          */
  46         public function describeCaptchaType() {
  47                 return [
  48                         'type' => 'question',
  49                         'mime' => 'text/html',
  50                 ];
  51         }
  52
  53         /**
  54          * @return array
  55          */
  56         function getCaptcha() {
  57                 global $wgCaptchaQuestions;
  58
  59                 // Backwards compatibility
  60                 if ( $wgCaptchaQuestions === array_values( $wgCaptchaQuestions ) ) {
  61                         return $wgCaptchaQuestions[ mt_rand( 0, count( $wgCaptchaQuestions ) - 1 ) ];
  62                 }
  63
  64                 $question = array_rand( $wgCaptchaQuestions, 1 );
  65                 $answer = $wgCaptchaQuestions[ $question ];
  66                 return [ 'question' => $question, 'answer' => $answer ];
  67         }
  68
  69         /**
  70          * @param int $tabIndex
  71          * @return array
  72          */
  73         function getFormInformation( $tabIndex = 1 ) {
  74                 $captcha = $this->getCaptcha();
  75                 if ( !$captcha ) {
  76                         die(
  77                                 "No questions found; set some in LocalSettings.php using the format from QuestyCaptcha.php."
  78                         );
  79                 }
  80                 $index = $this->storeCaptcha( $captcha );
  81                 return [
  82                         'html' => "<p><label for=\"wpCaptchaWord\">{$captcha['question']}</label> " .
  83                                 Html::element( 'input', [
  84                                         'name' => 'wpCaptchaWord',
  85                                         'id'   => 'wpCaptchaWord',
  86                                         'class' => 'mw-ui-input',
  87                                         'required',
  88                                         'autocomplete' => 'off',
  89                                         'tabindex' => $tabIndex ] ) . // tab in before the edit textarea
  90                                 "</p>\n" .
  91                                 Xml::element( 'input', [
  92                                         'type'  => 'hidden',
  93                                         'name'  => 'wpCaptchaId',
  94                                         'id'    => 'wpCaptchaId',
  95                                         'value' => $index ] )
  96                 ];
  97         }
  98
  99         function showHelp() {
 100                 global $wgOut;
 101                 $wgOut->setPageTitle( wfMessage( 'captchahelp-title' )->text() );
 102                 $wgOut->addWikiMsg( 'questycaptchahelp-text' );
 103                 if ( CaptchaStore::get()->cookiesNeeded() ) {
 104                         $wgOut->addWikiMsg( 'captchahelp-cookies-needed' );
 105                 }
 106         }
 107
 108         /**
 109          * @param array $captchaData
 110          * @param string $id
 111          * @return mixed
 112          */
 113         public function getCaptchaInfo( $captchaData, $id ) {
 114                 return $captchaData['question'];
 115         }
 116
 117         /**
 118          * @param array $requests
 119          * @param array $fieldInfo
 120          * @param array $formDescriptor
 121          * @param string $action
 122          */
 123         public function onAuthChangeFormFields( array $requests, array $fieldInfo,
 124                 array &$formDescriptor, $action ) {
 125                 /** @var CaptchaAuthenticationRequest $req */
 126                 $req =
 127                         AuthenticationRequest::getRequestByClass( $requests,
 128                                 CaptchaAuthenticationRequest::class, true );
 129                 if ( !$req ) {
 130                         return;
 131                 }
 132
 133                 // declare RAW HTML output.
 134                 $formDescriptor['captchaInfo']['raw'] = true;
 135                 $formDescriptor['captchaWord']['label-message'] = null;
 136         }
 137 }