File oops_lib/Xoops/Core/Text/Sanitizer/Extensions/YouTube.php

  1: <?php
  2: /*
  3:  You may not change or alter any portion of this comment or credits
  4:  of supporting developers from this source code or any supporting source code
  5:  which is considered copyrighted (c) material of the original comment or credit authors.
  6: 
  7:  This program is distributed in the hope that it will be useful,
  8:  but WITHOUT ANY WARRANTY; without even the implied warranty of
  9:  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 10: */
 11: 
 12: namespace Xoops\Core\Text\Sanitizer\Extensions;
 13: 
 14: use Xoops\Core\Text\Sanitizer;
 15: use Xoops\Core\Text\Sanitizer\ExtensionAbstract;
 16: 
 17: /**
 18:  * YouTube extension
 19:  *
 20:  * @category  Sanitizer
 21:  * @package   Xoops\Core\Text
 22:  * @author    Taiwen Jiang <phppp@users.sourceforge.net>
 23:  * @copyright 2000-2015 XOOPS Project (http://xoops.org)
 24:  * @license   GNU GPL 2 (http://www.gnu.org/licenses/gpl-2.0.html)
 25:  * @link      http://xoops.org
 26:  */
 27: class YouTube extends ExtensionAbstract
 28: {
 29:     /**
 30:      * @var array default configuration values
 31:      */
 32:     protected static $defaultConfiguration = [
 33:         'enabled' => true,
 34:         'template' => '<iframe width="%2$d" height="%3$d" src="https://www.youtube.com/embed/%1$s" frameborder="0" allowfullscreen></iframe>',
 35:         'width'  => "640",
 36:         'height' => "385",
 37:     ];
 38: 
 39:     /**
 40:      * Provide button and javascript code used by the DhtmlTextArea
 41:      *
 42:      * @param string $textAreaId dom element id
 43:      *
 44:      * @return string[] editor button as HTML, supporting javascript
 45:      */
 46:     public function getDhtmlEditorSupport($textAreaId)
 47:     {
 48:         $buttonCode = $this->getEditorButtonHtml(
 49:             $textAreaId,
 50:             'youtube.gif',
 51:             \XoopsLocale::YOUTUBE,
 52:             'xoopsCodeYoutube',
 53:             \XoopsLocale::YOUTUBE_URL,
 54:             \XoopsLocale::HEIGHT,
 55:             \XoopsLocale::WIDTH
 56:         );
 57: 
 58:         $javascript = <<<EOH
 59: 
 60:             function xoopsCodeYoutube(id, enterFlashPhrase, enterFlashHeightPhrase, enterFlashWidthPhrase)
 61:             {
 62:                 var selection = xoopsGetSelect(id);
 63:                 if (selection.length > 0) {
 64:                     var text = selection;
 65:                 } else {
 66:                     var text = prompt(enterFlashPhrase, "");
 67:                 }
 68:                 var domobj = xoopsGetElementById(id);
 69:                 if ( text.length > 0 ) {
 70:                     var text2 = prompt(enterFlashWidthPhrase, "640");
 71:                     var text3 = prompt(enterFlashHeightPhrase, "385");
 72:                     var result = '[youtube url="' + text + '"';
 73:                     if ( text2.length > 0) {
 74:                         result += ' width="' + text2 + '" height="' + text3 + '"';
 75:                     }
 76:                     result += " /]";
 77:                     xoopsInsertText(domobj, result);
 78:                 }
 79:                 domobj.focus();
 80:             }
 81: 
 82: EOH;
 83: 
 84:         return [$buttonCode, $javascript];
 85:     }
 86: 
 87:     /**
 88:      * Register extension with the supplied sanitizer instance
 89:      *
 90:      * @return void
 91:      */
 92:     public function registerExtensionProcessing()
 93:     {
 94:         $this->shortcodes->addShortcode(
 95:             'youtube',
 96:             function ($attributes, $content, $tagName) {
 97:                 if (array_key_exists(0, $attributes) && '=' === substr($attributes[0], 0, 1)) {
 98:                     $args = ltrim($attributes[0], '=');
 99:                     list($width, $height) = explode(',', $args);
100:                     $url = $content;
101:                 } else {
102:                     $defaults = [
103:                         'url'    => trim($content),
104:                         'width'  => $this->config['width'],
105:                         'height' => $this->config['height'],
106:                     ];
107:                     $cleanAttributes = $this->shortcodes->shortcodeAttributes($defaults, $attributes);
108:                     $url = $cleanAttributes['url'];
109:                     $width = $cleanAttributes['width'];
110:                     $height = $cleanAttributes['height'];
111:                 }
112: 
113:                 // from: http://stackoverflow.com/questions/2936467/parse-youtube-video-id-using-preg-match/6382259#6382259
114:                 $youtubeRegex = '%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)'
115:                     .'([^"&?/ ]{11})%i';
116: 
117:                 if (preg_match($youtubeRegex, $url, $match)) {
118:                     $videoId = $match[1];
119:                 } elseif (preg_match('%^[^"&?/ ]{11}$%', $url)) {
120:                     $videoId = $url;
121:                 } else {
122:                     return ''; // giveup
123:                 }
124:                 $template = $this->config['template'];
125:                 $newContent = sprintf($template, $videoId, $width, $height);
126:                 return $newContent;
127:             }
128:         );
129:     }
130: }
131:
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