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   1  <?php
   2  /**
   3  *
   4  * This file is part of the phpBB Forum Software package.
   5  *
   6  * @copyright (c) phpBB Limited <https://www.phpbb.com>
   7  * @license GNU General Public License, version 2 (GPL-2.0)
   8  *
   9  * For full copyright and license information, please see
  10  * the docs/CREDITS.txt file.
  11  *
  12  */
  13  
  14  namespace phpbb\feed;
  15  
  16  /**
  17  * Class with some helpful functions used in feeds
  18  */
  19  class helper
  20  {
  21      /** @var \phpbb\config\config */
  22      protected $config;
  23  
  24      /** @var \phpbb\user */
  25      protected $user;
  26  
  27      /** @var string */
  28      protected $phpbb_root_path;
  29  
  30      /** @var string */
  31      protected $phpEx;
  32  
  33      /**
  34      * Constructor
  35      *
  36      * @param    \phpbb\config\config    $config        Config object
  37      * @param    \phpbb\user        $user        User object
  38      * @param    string    $phpbb_root_path    Root path
  39      * @param    string    $phpEx                PHP file extension
  40      */
  41  	public function __construct(\phpbb\config\config $config, \phpbb\user $user, $phpbb_root_path, $phpEx)
  42      {
  43          $this->config = $config;
  44          $this->user = $user;
  45          $this->phpbb_root_path = $phpbb_root_path;
  46          $this->phpEx = $phpEx;
  47      }
  48  
  49      /**
  50      * Run links through append_sid(), prepend generate_board_url() and remove session id
  51      */
  52  	public function get_board_url()
  53      {
  54          static $board_url;
  55  
  56          if (empty($board_url))
  57          {
  58              $board_url = generate_board_url();
  59          }
  60  
  61          return $board_url;
  62      }
  63  
  64      /**
  65      * Run links through append_sid(), prepend generate_board_url() and remove session id
  66      */
  67  	public function append_sid($url, $params)
  68      {
  69          return append_sid($this->get_board_url() . '/' . $url, $params, true, '');
  70      }
  71  
  72      /**
  73      * Generate ISO 8601 date string (RFC 3339)
  74      */
  75  	public function format_date($time)
  76      {
  77          static $zone_offset;
  78          static $offset_string;
  79  
  80          if (empty($offset_string))
  81          {
  82              $zone_offset = $this->user->create_datetime()->getOffset();
  83              $offset_string = phpbb_format_timezone_offset($zone_offset);
  84          }
  85  
  86          return gmdate("Y-m-d\TH:i:s", $time + $zone_offset) . $offset_string;
  87      }
  88  
  89      /**
  90      * Generate text content
  91      *
  92      * @param string $content is feed text content
  93      * @param string $uid is bbcode_uid
  94      * @param string $bitfield is bbcode bitfield
  95      * @param int $options bbcode flag options
  96      * @param int $forum_id is the forum id
  97      * @param array $post_attachments is an array containing the attachments and their respective info
  98      * @return string the html content to be printed for the feed
  99      */
 100  	public function generate_content($content, $uid, $bitfield, $options, $forum_id, $post_attachments)
 101      {
 102          if (empty($content))
 103          {
 104              return '';
 105          }
 106  
 107          // Prepare some bbcodes for better parsing
 108          $content    = preg_replace("#\[quote(=&quot;.*?&quot;)?:$uid\]\s*(.*?)\s*\[/quote:$uid\]#si", "[quote$1:$uid]<br />$2<br />[/quote:$uid]", $content);
 109  
 110          $content = generate_text_for_display($content, $uid, $bitfield, $options);
 111  
 112          // Add newlines
 113          $content = str_replace('<br />', '<br />' . "\n", $content);
 114  
 115          // Convert smiley Relative paths to Absolute path, Windows style
 116          $content = str_replace($this->phpbb_root_path . $this->config['smilies_path'], $this->get_board_url() . '/' . $this->config['smilies_path'], $content);
 117  
 118          // Remove "Select all" link and mouse events
 119          $content = str_replace('<a href="#" onclick="selectCode(this); return false;">' . $this->user->lang['SELECT_ALL_CODE'] . '</a>', '', $content);
 120          $content = preg_replace('#(onkeypress|onclick)="(.*?)"#si', '', $content);
 121  
 122          // Firefox does not support CSS for feeds, though
 123  
 124          // Remove font sizes
 125      //    $content = preg_replace('#<span style="font-size: [0-9]+%; line-height: [0-9]+%;">([^>]+)</span>#iU', '\1', $content);
 126  
 127          // Make text strong :P
 128      //    $content = preg_replace('#<span style="font-weight: bold?">(.*?)</span>#iU', '<strong>\1</strong>', $content);
 129  
 130          // Italic
 131      //    $content = preg_replace('#<span style="font-style: italic?">([^<]+)</span>#iU', '<em>\1</em>', $content);
 132  
 133          // Underline
 134      //    $content = preg_replace('#<span style="text-decoration: underline?">([^<]+)</span>#iU', '<u>\1</u>', $content);
 135  
 136          // Remove embed Windows Media Streams
 137          $content    = preg_replace( '#<\!--\[if \!IE\]>-->([^[]+)<\!--<!\[endif\]-->#si', '', $content);
 138  
 139          // Do not use &lt; and &gt;, because we want to retain code contained in [code][/code]
 140  
 141          // Remove embed and objects
 142          $content    = preg_replace( '#<(object|embed)(.*?) (value|src)=(.*?) ([^[]+)(object|embed)>#si',' <a href=$4 target="_blank"><strong>$1</strong></a> ',$content);
 143  
 144          // Remove some specials html tag, because somewhere there are a mod to allow html tags ;)
 145          $content    = preg_replace( '#<(script|iframe)([^[]+)\1>#siU', ' <strong>$1</strong> ', $content);
 146  
 147          // Parse inline images to display with the feed
 148          if (!empty($post_attachments))
 149          {
 150              $update_count = array();
 151              parse_attachments($forum_id, $content, $post_attachments, $update_count);
 152              $content .= implode('<br />', $post_attachments);
 153  
 154              // Convert attachments' relative path to absolute path
 155              $content = str_replace($this->phpbb_root_path . 'download/file.' . $this->phpEx, $this->get_board_url() . '/download/file.' . $this->phpEx, $content);
 156          }
 157  
 158          // Remove Comments from inline attachments [ia]
 159          $content = preg_replace('#<dd>(.*?)</dd>#','',$content);
 160  
 161          // Replace some entities with their unicode counterpart
 162          $entities = array(
 163              '&nbsp;'    => "\xC2\xA0",
 164              '&bull;'    => "\xE2\x80\xA2",
 165              '&middot;'    => "\xC2\xB7",
 166              '&copy;'    => "\xC2\xA9",
 167          );
 168  
 169          $content = str_replace(array_keys($entities), array_values($entities), $content);
 170  
 171          // Remove CDATA blocks. ;)
 172          $content = preg_replace('#\<\!\[CDATA\[(.*?)\]\]\>#s', '', $content);
 173  
 174          // Other control characters
 175          $content = preg_replace('#(?:[\x00-\x1F\x7F]+|(?:\xC2[\x80-\x9F])+)#', '', $content);
 176  
 177          return $content;
 178      }
 179  }