File oops_lib/Xoops/Core/Text/Sanitizer/Extensions/Embed.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\FilterAbstract;
 16: 
 17: /**
 18:  * TextSanitizer filter - clean up HTML text
 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 Embed extends FilterAbstract
 28: {
 29:     /**
 30:      * @var array default configuration values
 31:      */
 32:     protected static $defaultConfiguration = [
 33:         'enabled' => true,
 34:         'cache_time' => 15552000, // 180 days in seconds
 35:     ];
 36: 
 37:     /**
 38:      * Make and URL's in the text clickable links
 39:      *
 40:      * @param string $text text string to filter
 41:      *
 42:      * @return mixed
 43:      */
 44:     public function applyFilter($text)
 45:     {
 46:         if (!$this->config['enabled']) {
 47:             return $text;
 48:         }
 49: 
 50:         $pattern = '/^(https?:\/\/([\p{L}\p{N}]{1,}\.){1,}[\p{L}\p{N}]{2,}[\/\?\.\-_&=:#\p{L}\p{N}]{0,})$/m';
 51: 
 52:         $text = preg_replace_callback(
 53:             $pattern,
 54:             [$this, 'decorateUrl'],
 55:             $text
 56:         );
 57: 
 58:         return $text;
 59:     }
 60: 
 61:     /**
 62:      * decorate a bare url with the help of embed/embed
 63:      *
 64:      * @param string $match string to be truncated
 65:      *
 66:      * @return string
 67:      */
 68:     protected function decorateUrl($match) {
 69:         $url = $match[1];
 70:         $decorated = null;
 71:         $xoops = \Xoops::getInstance();
 72:         $md5 = md5($url);
 73:         $crc = hash("crc32b", $url);
 74:         $key = ['embed', substr($crc, -2), $md5];
 75:         //$xoops->cache()->delete($key);
 76:         $decorated = $xoops->cache()->cacheRead(
 77:             $key,
 78:             function ($url) {
 79:                 $return = null;
 80:                 try {
 81:                     $info = \Embed\Embed::create($url);
 82:                 } catch (\Exception $e) {
 83:                     $info = null;
 84:                 }
 85:                 if (is_object($info)) {
 86:                     $return = $info->code;
 87:                     if (empty($return)) {
 88:                         $return = $this->mediaBox($info->url, $info->image, $info->title, $info->description);
 89:                     }
 90:                 }
 91:                 if (empty($return)) {
 92:                     $return = $url;
 93:                 }
 94:                 return $return;
 95:             },
 96:             $this->config['cache_time'],
 97:             $url
 98:         );
 99:         return $decorated;
100:     }
101: 
102:     protected function mediaBox($link, $imageSrc, $title, $description)
103:     {
104:         $htmlTemplate = <<<'EOT'
105: <div class="media">
106:   <a class="pull-left" href="%1$s" rel="external">
107:     <img src="%2$s" class="media-object" style="max-height: 128px; max-width: 128px;">
108:   </a>
109:   <div class="media-body">
110:     <h4 class="media-heading">%3$s</h4>
111: %4$s
112:   </div>
113: </div>
114: EOT;
115: 
116:         if(empty($imageSrc)) {
117:             $imageSrc = \Xoops::getInstance()->url('media/xoops/images/icons/link-ext.svg');
118:         }
119:         $box = sprintf($htmlTemplate, $link, $imageSrc, $title, $description);
120:         return $box;
121:     }
122: 
123: }
124:
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