function ascii_art_captcha_captcha in CAPTCHA Pack 8

Same name and namespace in other branches

1. 5 ascii_art_captcha/ascii_art_captcha.module \ascii_art_captcha_captcha()
2. 6 ascii_art_captcha/ascii_art_captcha.module \ascii_art_captcha_captcha()
3. 7 ascii_art_captcha/ascii_art_captcha.module \ascii_art_captcha_captcha()

Implements hook_captcha().

File

ascii_art_captcha/ascii_art_captcha.module, line 64

Contains general functionality of the module.

Code

function ascii_art_captcha_captcha($op, $captcha_type = '') {
  switch ($op) {
    case 'list':
      return [
        'ASCII art CAPTCHA',
      ];
    case 'generate':
      if ($captcha_type == "ASCII art CAPTCHA") {
        $config = Drupal::config('ascii_art_captcha.settings');

        // Get settings.
        $allowed_chars = _ascii_art_captcha_get_allowed_characters();
        $code_length = (int) $config
          ->get('ascii_art_captcha_code_length');

        // Load font.
        $font_name = $config
          ->get('ascii_art_captcha_font');
        if (!(include_once 'fonts/ascii_art_captcha_font_' . $font_name . '.inc')) {
          return;
        }
        $font = call_user_func('ascii_art_captcha_font_' . $font_name);
        if (!$font) {
          return;
        }

        // Build solution and ASCII art array.
        $solution = '';
        $ascii_lines = [];
        for ($i = 0; $i < $font['height']; $i++) {
          $ascii_lines[$i] = '';
        }
        for ($i = 0; $i < $code_length; $i++) {
          $character = $allowed_chars[array_rand($allowed_chars)];
          $solution .= $character;
          foreach ($font[$character] as $l => $cline) {
            $ascii_lines[$l] .= ' ' . Html::escape($cline);
          }
        }

        // Build CAPTCHA array.
        $captcha = [];
        $captcha['solution'] = $solution;
        $style = 'line-height:1.2;';
        if ($config
          ->get('ascii_art_captcha_font_size')) {
          $style .= 'font-size:' . $config
            ->get('ascii_art_captcha_font_size') . 'pt;';
        }
        $captcha['form']['ascii'] = [
          '#type' => 'inline_template',
          '#template' => '<pre class="ascii_art_captcha" style="' . $style . '">' . implode('<br />', $ascii_lines) . '</pre>',
          '#cache' => [
            'max-age' => 0,
          ],
        ];
        $captcha['form']['captcha_response'] = [
          '#type' => 'textfield',
          '#title' => t('Enter the code above'),
          '#size' => 10,
          '#maxlength' => 10,
          '#required' => TRUE,
          '#description' => t('Enter the code depicted in ASCII art style.'),
          '#cache' => [
            'max-age' => 0,
          ],
        ];
        \Drupal::service('page_cache_kill_switch')
          ->trigger();
        return $captcha;
      }
      break;
  }
}