1: <?php
  2: 
  3: /**
  4:  * TextSanitizer extension
  5:  *
  6:  * You may not change or alter any portion of this comment or credits
  7:  * of supporting developers from this source code or any supporting source code
  8:  * which is considered copyrighted (c) material of the original comment or credit authors.
  9:  * This program is distributed in the hope that it will be useful,
 10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 12:  *
 13:  * @copyright       (c) 2000-2017 XOOPS Project (www.xoops.org)
 14:  * @license             GNU GPL 2 (http://www.gnu.org/licenses/gpl-2.0.html)
 15:  * @package             class
 16:  * @subpackage          textsanitizer
 17:  * @since               2.3.0
 18:  * @author              Taiwen Jiang <phppp@users.sourceforge.net>
 19:  */
 20: class MytsYoutube extends MyTextSanitizerExtension
 21: {
 22:     /**
 23:      * @param $textarea_id
 24:      *
 25:      * @return array
 26:      */
 27:     public function encode($textarea_id)
 28:     {
 29:         $config = parent::loadConfig(__DIR__);
 30:         $code = "<button type='button' class='btn btn-default btn-sm' onclick='xoopsCodeYoutube(\"{$textarea_id}\",\""
 31:             . htmlspecialchars(_XOOPS_FORM_ENTERYOUTUBEURL, ENT_QUOTES) . "\",\""
 32:             . htmlspecialchars(_XOOPS_FORM_ALT_ENTERHEIGHT, ENT_QUOTES) . "\",\""
 33:             . htmlspecialchars(_XOOPS_FORM_ALT_ENTERWIDTH, ENT_QUOTES)
 34:             . "\");' onmouseover='style.cursor=\"hand\"' title='" . _XOOPS_FORM_ALTYOUTUBE
 35:             . "'><span class='fa fa-fw fa-youtube' aria-hidden='true'></span></button>";
 36:         $javascript = <<<EOH
 37:             function xoopsCodeYoutube(id, enterFlashPhrase, enterFlashHeightPhrase, enterFlashWidthPhrase)
 38:             {
 39:                 var selection = xoopsGetSelect(id);
 40:                 if (selection.length > 0) {
 41:                     var text = selection;
 42:                 } else {
 43:                     var text = prompt(enterFlashPhrase, "");
 44:                 }
 45:                 var domobj = xoopsGetElementById(id);
 46:                 if (text.length > 0) {
 47:                     var text2 = prompt(enterFlashWidthPhrase, "16x9");
 48:                     var text3 = prompt(enterFlashHeightPhrase, "");
 49:                     var result = "[youtube="+text2+","+text3+"]" + text + "[/youtube]";
 50:                     xoopsInsertText(domobj, result);
 51:                 }
 52:                 domobj.focus();
 53:             }
 54: EOH;
 55: 
 56:         return array($code, $javascript);
 57:     }
 58: 
 59:     /**
 60:      * @param $match
 61:      *
 62:      * @return string
 63:      */
 64:     public static function myCallback($match)
 65:     {
 66:         return self::decode($match[4], $match[2], $match[3]);
 67:     }
 68: 
 69:     /**
 70:      * @param $ts
 71:      */
 72:     public function load($ts)
 73:     {
 74:         //        $ts->patterns[] = "/\[youtube=(['\"]?)([^\"']*),([^\"']*)\\1]([^\"]*)\[\/youtube\]/esU";
 75:         //        $ts->replacements[] = __CLASS__ . "::decode( '\\4', '\\2', '\\3' )";
 76: 
 77:         //mb------------------------------
 78:         $ts->callbackPatterns[] = "/\[youtube=(['\"]?)([^\"']*),([^\"']*)\\1]([^\"]*)\[\/youtube\]/sU";
 79:         $ts->callbacks[]        = __CLASS__ . '::myCallback';
 80:         //mb------------------------------
 81:     }
 82: 
 83:     /**
 84:      * @param $url
 85:      * @param $width
 86:      * @param $height
 87:      *
 88:      * @return string
 89:      */
 90:     public static function decode($url, $width, $height)
 91:     {
 92:         // modernized responsive youtube handling suggested by XOOPS user xd9527 -- thanks!
 93:         // http://xoops.org/modules/newbb/viewtopic.php?post_id=359913
 94: 
 95:         // match known youtube urls
 96:         // from: http://stackoverflow.com/questions/2936467/parse-youtube-video-id-using-preg-match/6382259#6382259
 97:         $youtubeRegex = '%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)'
 98:             .'([^"&?/ ]{11})%i';
 99: 
100:         if (preg_match($youtubeRegex, $url, $match)) {
101:             $videoId = $match[1]; // extract just the video id from a url
102:         } elseif (preg_match('%^[^"&?/ ]{11}$%', $url)) {
103:             $videoId = $url; // have a bare video id
104:         } else {
105:             trigger_error("Not matched: {$url} {$width} {$height}", E_USER_WARNING);
106:             return '';
107:         }
108: 
109:         $width = empty($width) ? 426 : (int) $width;
110:         switch ($width) {
111:             case 4:
112:                 $height = 3;
113:                 break;
114:             case 16:
115:                 $height = 9;
116:                 break;
117:             default:
118:                 $height = empty($height) ? 240 : (int) $height;
119:                 break;
120:         }
121: 
122:         $aspectRatio = $width/$height; // 16x9 = 1.777777778, 4x3 = 1.333333333
123:         $responsiveAspect = ($aspectRatio < 1.4) ? 'embed-responsive-4by3' : 'embed-responsive-16by9';
124:         if ($width < 17 && $height < 10) {
125:             $scale = (int) 450 / $width;
126:             $width = $width * $scale;
127:             $height = $height * $scale;
128:         }
129: 
130:         $template = <<<'EOD'
131:         <div class="embed-responsive %4$s">
132:         <iframe class="embed-responsive-item" width="%2$d" height="%3$d" src="https://www.youtube.com/embed/%1$s" frameborder="0" allowfullscreen></iframe>
133:         </div>
134: EOD;
135: 
136:         $code = sprintf($template, $videoId, $width, $height, $responsiveAspect);
137:         return $code;
138:     }
139: }
140: