docs/home/classes/ContentUtility.class.php

   1 <?php\r
   2 /************************************************************************/\r
   3 /* AContent                                                             */\r
   4 /************************************************************************/\r
   5 /* Copyright (c) 2010                                                   */\r
   6 /* Inclusive Design Institute                                           */\r
   7 /*                                                                      */\r
   8 /* This program is free software. You can redistribute it and/or        */\r
   9 /* modify it under the terms of the GNU General Public License          */\r
  10 /* as published by the Free Software Foundation.                        */\r
  11 /************************************************************************/\r
  12 \r
  13 /**\r
  14 * Content Utility functions \r
  15 * @access       public\r
  16 * @author       Cindy Qi Li\r
  17 */\r
  18 \r
  19 if (!defined('TR_INCLUDE_PATH')) exit;\r
  20 \r
  21 class ContentUtility {\r
  22 \r
  23         /**\r
  24         * This function cuts out html body\r
  25         * @access  public\r
  26         * @param   $text  html text\r
  27         * @author  Cindy Qi Li\r
  28         */\r
  29         public static function getHtmlBody($text) {\r
  30                 /* strip everything before <body> */\r
  31                 $start_pos      = strpos(strtolower($text), '<body');\r
  32                 if ($start_pos !== false) {\r
  33                         $start_pos      += strlen('<body');\r
  34                         $end_pos        = strpos(strtolower($text), '>', $start_pos);\r
  35                         $end_pos        += strlen('>');\r
  36         \r
  37                         $text = substr($text, $end_pos);\r
  38                 }\r
  39         \r
  40                 /* strip everything after </body> */\r
  41                 $end_pos        = strpos(strtolower($text), '</body>');\r
  42                 if ($end_pos !== false) {\r
  43                         $text = trim(substr($text, 0, $end_pos));\r
  44                 }\r
  45         \r
  46                 return $text;\r
  47         }\r
  48 \r
  49         /**\r
  50         * This function cuts out requested tag information from html head\r
  51         * @access  public\r
  52         * @param   $text  html text\r
  53         * @param   $tags  a string or an array of requested tags\r
  54         * @author  Cindy Qi Li\r
  55         */\r
  56         public static function getHtmlHeadByTag($text, $tags)\r
  57         {\r
  58                 $head = ContentUtility::getHtmlHead($text);\r
  59                 $rtn_text = "";\r
  60                 \r
  61                 if (!is_array($tags) && strlen(trim($tags)) > 0)\r
  62                 {\r
  63                         $tags = array(trim($tags));\r
  64                 }\r
  65                 foreach ($tags as $tag)\r
  66                 {\r
  67                         $tag = strtolower($tag);\r
  68         \r
  69                         /* strip everything before <{tag}> */\r
  70                         $start_pos      = stripos($head, '<'.$tag);\r
  71                         $temp_head = $head;\r
  72                         \r
  73                         while ($start_pos !== false) \r
  74                         {\r
  75                                 $temp_text = substr($temp_head, $start_pos);\r
  76                 \r
  77                                 /* strip everything after </{tag}> or />*/\r
  78                                 $end_pos        = stripos($temp_text, '</' . $tag . '>');\r
  79                 \r
  80                                 if ($end_pos !== false) \r
  81                                 {\r
  82                                         $end_pos += strlen('</' . $tag . '>');\r
  83                                         \r
  84                                         // add an empty line after each tag information\r
  85                                         $rtn_text .= trim(substr($temp_text, 0, $end_pos)) . '\r
  86                 \r
  87         ';\r
  88                                 }\r
  89                                 else  // match /> as ending tag if </tag> is not found\r
  90                                 {\r
  91                                         $end_pos        = stripos($temp_text, '/>');\r
  92                                         \r
  93                                         if($end_pos === false && stripos($temp_text, $tag.'>')===false){\r
  94                                                 //if /> is not found, then this is not a valid XHTML\r
  95                                                 //text iff it's not tag>\r
  96                                                 $end_pos = stripos($temp_text, '>');\r
  97                                                 $end_pos += strlen('>');\r
  98                                         } else {\r
  99                                                 $end_pos += strlen('/>');\r
 100                                         }\r
 101                                         // add an empty line after each tag information\r
 102                                         $rtn_text .= trim(substr($temp_text, 0, $end_pos)) . '\r
 103                 \r
 104         ';\r
 105                                 }\r
 106                                 \r
 107                                 // initialize vars for next round of matching\r
 108                                 $temp_head = substr($temp_text, $end_pos);\r
 109                                 $start_pos = stripos($temp_head, '<'.$tag);\r
 110                         }\r
 111                 }\r
 112                 return $rtn_text;\r
 113         }\r
 114 \r
 115         /**\r
 116         * This function cuts out html head\r
 117         * @access  private\r
 118         * @param   $text  html text\r
 119         * @author  Cindy Qi Li\r
 120         */\r
 121         private static function getHtmlHead ($text) {\r
 122                 /* strip everything before <head> */\r
 123                 $start_pos      = stripos($text, '<head');\r
 124                 if ($start_pos !== false) {\r
 125                         $start_pos      += strlen('<head');\r
 126                         $end_pos        = stripos($text, '>', $start_pos);\r
 127                         $end_pos        += strlen('>');\r
 128         \r
 129                         $text = substr($text, $end_pos);\r
 130                 }\r
 131         \r
 132                 /* strip everything after </head> */\r
 133                 $end_pos        = stripos($text, '</head');\r
 134                 if ($end_pos !== false) {\r
 135                         $text = trim(substr($text, 0, $end_pos));\r
 136                 }\r
 137                 return $text;\r
 138         }\r
 139 \r
 140         private static function embedFLV($text) {\r
 141                 global $content_base_href;\r
 142                 \r
 143                 // .flv - uses Flowplayer 3.0 from flowplayer.org (playing file via full URL)\r
 144                 preg_match_all("#\[media[0-9a-z\|]*\]http://([\w\./-]+)\.flv\[/media\]#i",$text,$media_matches[0],PREG_SET_ORDER);\r
 145                 $media_replace[0] ="<a class=\"flowplayerholder\"\r
 146                 style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\"\r
 147                 href=\"http://##MEDIA1##.flv\">\r
 148                 </a>";\r
 149                 \r
 150                 // .flv - uses Flowplayer 3.0 from flowplayer.org (playing file from AT_content_dir)\r
 151                 preg_match_all("#\[media[0-9a-z\|]*\]([\w\./-]+)\.flv\[/media\]#i",$text,$media_matches[1],PREG_SET_ORDER);\r
 152                 $media_replace[1] ="<a class=\"flowplayerholder\"\r
 153                 style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\"\r
 154                 href=\"".TR_BASE_HREF."get.php/".$content_base_href."##MEDIA1##.flv\">\r
 155                 </a>";\r
 156                 \r
 157                 $has_flv = false;\r
 158                 // Executing the replace\r
 159                 for ($i=0;$i<count($media_replace);$i++){\r
 160                         foreach($media_matches[$i] as $media)\r
 161                         {\r
 162                                 if (is_array($media)) $has_flv = true;\r
 163                                 \r
 164                                 //find width and height for each matched media\r
 165                                 if (preg_match("/\[media\|([0-9]*)\|([0-9]*)\]*/", $media[0], $matches)) \r
 166                                 {\r
 167                                         $width = $matches[1];\r
 168                                         $height = $matches[2];\r
 169                                 }\r
 170                                 else\r
 171                                 {\r
 172                                         $width = 425;\r
 173                                         $height = 350;\r
 174                                 }\r
 175                                 \r
 176                                 //replace media tags with embedded media for each media tag\r
 177                                 $media_input = $media_replace[$i];\r
 178                                 $media_input = str_replace("##WIDTH##","$width",$media_input);\r
 179                                 $media_input = str_replace("##HEIGHT##","$height",$media_input);\r
 180                                 $media_input = str_replace("##MEDIA1##","$media[1]",$media_input);\r
 181                                 $media_input = str_replace("##MEDIA2##","$media[2]",$media_input);\r
 182                                 $text = str_replace($media[0],$media_input,$text);\r
 183                         }\r
 184                 }\r
 185                 \r
 186                 if ($has_flv)\r
 187                 {\r
 188                         $text .= '\r
 189                         <script language="JavaScript">\r
 190                                 $f("a.flowplayerholder", "'.TR_BASE_HREF.'include/jscripts/flowplayer/flowplayer-3.1.2.swf", { \r
 191                                         clip: { autoPlay: false },              \r
 192                                 plugins:  { \r
 193                                         controls: { \r
 194                                             all: false,  \r
 195                                             play: true,  \r
 196                                             scrubber: true \r
 197                                         }         \r
 198                                     }\r
 199                                 });\r
 200                         </script>\r
 201                         ';\r
 202                 }\r
 203                 \r
 204                 return $text;           \r
 205         }\r
 206         \r
 207         public static function embedMedia($text) {\r
 208                 if (preg_match("/\[media(\|[0-9]+\|[0-9]+)?\]*/", $text)==0){\r
 209                         return $text;\r
 210                 }\r
 211         \r
 212                 $media_matches = Array();\r
 213                 \r
 214                 /*\r
 215                         First, we search though the text for all different kinds of media defined by media tags and store the results in $media_matches.\r
 216                         \r
 217                         Then the different replacements for the different media tags are stored in $media_replace.\r
 218                         \r
 219                         Lastly, we loop through all $media_matches / $media_replaces. (We choose $media_replace as index because $media_matches is multi-dimensioned.) It is important that for each $media_matches there is a $media_replace with the same index. For each media match we check the width/height, or we use the default value of 425x350. We then replace the height/width/media1/media2 parameter placeholders in $media_replace with the correct ones, before running a str_replace on $text, replacing the given media with its correct replacement.\r
 220                         \r
 221                 */\r
 222                 \r
 223                 // youtube videos\r
 224                 preg_match_all("#\[media[0-9a-z\|]*\]http://([a-z0-9\.]*)?youtube.com/watch\?v=([a-z0-9_-]+)\[/media\]#i",$text,$media_matches[1],PREG_SET_ORDER);\r
 225                 $media_replace[1] = '<object width="##WIDTH##" height="##HEIGHT##"><param name="movie" value="http://##MEDIA1##youtube.com/v/##MEDIA2##"></param><embed src="http://##MEDIA1##youtube.com/v/##MEDIA2##" type="application/x-shockwave-flash" width="##WIDTH##" height="##HEIGHT##"></embed></object>';\r
 226                         \r
 227                 // .mpg\r
 228                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mpg\[/media\]#i",$text,$media_matches[2],PREG_SET_ORDER);\r
 229                 $media_replace[2] = "<object data=\"##MEDIA1##.mpg\" type=\"video/mpeg\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.mpg\"><param name=\"autoplay\" value=\"false\"><param name=\"autoStart\" value=\"0\"><a href=\"##MEDIA1##.mpg\">##MEDIA1##.mpg</a></object>";\r
 230                 \r
 231                 // .avi\r
 232                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).avi\[/media\]#i",$text,$media_matches[3],PREG_SET_ORDER);\r
 233                 $media_replace[3] = "<object data=\"##MEDIA1##.avi\" type=\"video/x-msvideo\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.avi\"><param name=\"autoplay\" value=\"false\"><param name=\"autoStart\" value=\"0\"><a href=\"##MEDIA1##.avi\">##MEDIA1##.avi</a></object>";\r
 234                 \r
 235                 // .wmv\r
 236                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).wmv\[/media\]#i",$text,$media_matches[4],PREG_SET_ORDER);\r
 237                 $media_replace[4] = "<object data=\"##MEDIA1##.wmv\" type=\"video/x-ms-wmv\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.wmv\"><param name=\"autoplay\" value=\"false\"><param name=\"autoStart\" value=\"0\"><a href=\"##MEDIA1##.wmv\">##MEDIA1##.wmv</a></object>";\r
 238                 \r
 239                 // .mov\r
 240                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mov\[/media\]#i",$text,$media_matches[5],PREG_SET_ORDER);\r
 241                 $media_replace[5] = "<object classid=\"clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B\" codebase=\"http://www.apple.com/qtactivex/qtplugin.cab\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.mov\"><param name=\"controller\" value=\"true\"><param name=\"autoplay\" value=\"false\"><!--[if gte IE 7]> <!--><object type=\"video/quicktime\" data=\"##MEDIA1##.mov\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"controller\" value=\"true\"><param name=\"autoplay\" value=\"false\"><a href=\"##MEDIA1##.mov\">##MEDIA1##.mov</a></object><!--<![endif]--><!--[if lt IE 7]><a href=\"##MEDIA1##.mov\">##MEDIA1##.mov</a><![endif]--></object>";\r
 242                 \r
 243                 // .swf\r
 244                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).swf\[/media\]#i",$text,$media_matches[6],PREG_SET_ORDER);\r
 245                 $media_replace[6] = "<object type=\"application/x-shockwave-flash\" data=\"##MEDIA1##.swf\" width=\"##WIDTH##\" height=\"##HEIGHT##\">  <param name=\"movie\" value=\"##MEDIA1##.swf\"><param name=\"loop\" value=\"false\"><a href=\"##MEDIA1##.swf\">##MEDIA1##.swf</a></object>";\r
 246                 \r
 247                 // .mp3\r
 248                 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).mp3\[/media\]#i",$text,$media_matches[7],PREG_SET_ORDER);\r
 249                 $media_replace[7] = "<object type=\"audio/mpeg\" data=\"##MEDIA1##.mp3\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.mp3\"><param name=\"autoplay\" value=\"false\"><param name=\"autoStart\" value=\"0\"><a href=\"##MEDIA1##.mp3\">##MEDIA1##.mp3</a></object>";\r
 250                 \r
 251                 // .wav\r
 252                 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).wav\[/media\]#i",$text,$media_matches[8],PREG_SET_ORDER);\r
 253                 $media_replace[8] ="<object type=\"audio/x-wav\" data=\"##MEDIA1##.wav\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.wav\"><param name=\"autoplay\" value=\"false\"><param name=\"autoStart\" value=\"0\"><a href=\"##MEDIA1##.wav\">##MEDIA1##.wav</a></object>";\r
 254                 \r
 255                 // .ogg\r
 256                 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).ogg\[/media\]#i",$text,$media_matches[9],PREG_SET_ORDER);\r
 257                 $media_replace[9] ="<object type=\"application/ogg\" data=\"##MEDIA1##.ogg\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.ogg\"><a href=\"##MEDIA1##.ogg\">##MEDIA1##.ogg</a></object>";\r
 258                 \r
 259                 // .mid\r
 260                 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).mid\[/media\]#i",$text,$media_matches[10],PREG_SET_ORDER);\r
 261                 $media_replace[10] ="<object type=\"application/x-midi\" data=\"##MEDIA1##.mid\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.mid\"><a href=\"##MEDIA1##.mid\">##MEDIA1##.mid</a></object>";\r
 262                 \r
 263                 $text = preg_replace("#\[media[0-9a-z\|]*\](.+[^\s\"]+).mid\[/media\]#i", "<object type=\"application/x-midi\" data=\"\\1.mid\" width=\"".$width."\" height=\"".$height."\"><param name=\"src\" value=\"\\1.mid\"><a href=\"\\1.mid\">\\1.mid</a></object>", $text);\r
 264         \r
 265                 // Executing the replace\r
 266                 for ($i=1;$i<=count($media_replace);$i++){\r
 267                         foreach($media_matches[$i] as $media)\r
 268                         {\r
 269                                 \r
 270                                 //find width and height for each matched media\r
 271                                 if (preg_match("/\[media\|([0-9]*)\|([0-9]*)\]*/", $media[0], $matches)) \r
 272                                 {\r
 273                                         $width = $matches[1];\r
 274                                         $height = $matches[2];\r
 275                                 }\r
 276                                 else\r
 277                                 {\r
 278                                         $width = 425;\r
 279                                         $height = 350;\r
 280                                 }\r
 281                                 \r
 282                                 //replace media tags with embedded media for each media tag\r
 283                                 $media_input = $media_replace[$i];\r
 284                                 $media_input = str_replace("##WIDTH##","$width",$media_input);\r
 285                                 $media_input = str_replace("##HEIGHT##","$height",$media_input);\r
 286                                 $media_input = str_replace("##MEDIA1##","$media[1]",$media_input);\r
 287                                 $media_input = str_replace("##MEDIA2##","$media[2]",$media_input);\r
 288                                 $text = str_replace($media[0],$media_input,$text);\r
 289                         }\r
 290                 }\r
 291                 \r
 292                 $text = ContentUtility::embedFLV($text);\r
 293                 \r
 294                 return $text;\r
 295         }\r
 296 \r
 297         private static function makeClickable($text) {\r
 298                 $text = ContentUtility::embedMedia($text);\r
 299         \r
 300         //      $text = eregi_replace("([[:space:]])(http[s]?)://([^[:space:]<]*)([[:alnum:]#?/&=])", "\\1<a href=\"\\2://\\3\\4\">\\3\\4</a>", $text);\r
 301         //\r
 302         //      $text = eregi_replace(  '([_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.\r
 303         //                                                      '\@'.'[_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'(\.[a-zA-Z]{1,6})+)',\r
 304         //                                                      "<a href=\"mailto:\\1\">\\1</a>",\r
 305         //                                                      $text);\r
 306         \r
 307                 $text = preg_replace("/([\s])(http[s]?):\/\/(.*)(\s|\$|<br\s\/\>)(.*)/U", \r
 308                                      "\\1<a href=\"\\2://\\3\">\\3</a>\\4\\5", $text);\r
 309                 \r
 310                 $text = preg_replace('/([_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.\r
 311                                                         '\@'.'[_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'(\.[a-zA-Z]{1,6})+)/i',\r
 312                                                         "<a href=\"mailto:\\1\">\\1</a>",\r
 313                                                         $text);\r
 314                 return $text;\r
 315         }\r
 316 \r
 317         private static function myCodes($text, $html = false) {\r
 318                 global $_base_path;\r
 319                 global $HTTP_USER_AGENT;\r
 320         \r
 321                 if (substr($HTTP_USER_AGENT,0,11) == 'Mozilla/4.7') {\r
 322                         $text = str_replace('[quote]','</p><p class="block">',$text);\r
 323                         $text = str_replace('[/quote]','</p><p>',$text);\r
 324         \r
 325                         $text = str_replace('[reply]','</p><p class="block">',$text);\r
 326                         $text = str_replace('[/reply]','</p><p>',$text);\r
 327                 } else {\r
 328                         $text = str_replace('[quote]','<blockquote>',$text);\r
 329                         $text = str_replace('[/quote]','</blockquote><p>',$text);\r
 330         \r
 331                         $text = str_replace('[reply]','</p><blockquote class="block"><p>',$text);\r
 332                         $text = str_replace('[/reply]','</p></blockquote><p>',$text);\r
 333                 }\r
 334         \r
 335                 $text = str_replace('[b]','<strong>',$text);\r
 336                 $text = str_replace('[/b]','</strong>',$text);\r
 337         \r
 338                 $text = str_replace('[i]','<em>',$text);\r
 339                 $text = str_replace('[/i]','</em>',$text);\r
 340         \r
 341                 $text = str_replace('[u]','<u>',$text);\r
 342                 $text = str_replace('[/u]','</u>',$text);\r
 343         \r
 344                 $text = str_replace('[center]','<center>',$text);\r
 345                 $text = str_replace('[/center]','</center><p>',$text);\r
 346         \r
 347                 /* colours */\r
 348                 $text = str_replace('[blue]','<span style="color: blue;">',$text);\r
 349                 $text = str_replace('[/blue]','</span>',$text);\r
 350         \r
 351                 $text = str_replace('[orange]','<span style="color: orange;">',$text);\r
 352                 $text = str_replace('[/orange]','</span>',$text);\r
 353         \r
 354                 $text = str_replace('[red]','<span style="color: red;">',$text);\r
 355                 $text = str_replace('[/red]','</span>',$text);\r
 356         \r
 357                 $text = str_replace('[purple]','<span style="color: purple;">',$text);\r
 358                 $text = str_replace('[/purple]','</span>',$text);\r
 359         \r
 360                 $text = str_replace('[green]','<span style="color: green;">',$text);\r
 361                 $text = str_replace('[/green]','</span>',$text);\r
 362         \r
 363                 $text = str_replace('[gray]','<span style="color: gray;">',$text);\r
 364                 $text = str_replace('[/gray]','</span>',$text);\r
 365         \r
 366                 $text = str_replace('[op]','<span class="bigspacer"></span> <a href="',$text);\r
 367                 $text = str_replace('[/op]','">'._AT('view_entire_post').'</a>',$text);\r
 368         \r
 369                 $text = str_replace('[head1]','<h2>',$text);\r
 370                 $text = str_replace('[/head1]','</h2>',$text);\r
 371         \r
 372                 $text = str_replace('[head2]','<h3>',$text);\r
 373                 $text = str_replace('[/head2]','</h3>',$text);\r
 374         \r
 375                 $text = str_replace('[cid]',$_base_path.'content.php?_cid='.$_SESSION['s_cid'],$text);\r
 376         \r
 377                 global $sequence_links, $_course_id, $_content_id;\r
 378                 if ($_course_id > 0 && !isset($sequence_links) && $_content_id > 0) {\r
 379                         global $contentManager;\r
 380                         $sequence_links = $contentManager->generateSequenceCrumbs($_content_id);\r
 381                 }\r
 382                 if (isset($sequence_links['previous']) && $sequence_links['previous']['url']) {\r
 383                         $text = str_replace('[pid]', $sequence_links['previous']['url'], $text);\r
 384                 }\r
 385                 if (isset($sequence_links['next']) && $sequence_links['next']['url']) {\r
 386                         $text = str_replace('[nid]', $sequence_links['next']['url'], $text);\r
 387                 }\r
 388                 if (isset($sequence_links['resume']) && $sequence_links['resume']['url']) {\r
 389                         $text = str_replace('[nid]', $sequence_links['resume']['url'], $text);\r
 390                 }\r
 391                 if (isset($sequence_links['first']) && $sequence_links['first']['url']) {\r
 392                         $text = str_replace('[fid]', $sequence_links['first']['url'], $text);\r
 393                 }\r
 394         \r
 395                 /* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */\r
 396             $html = !$html ? 0 : 1;\r
 397             \r
 398                 // little hack added by greg to add syntax highlighting without using <?php \?\>\r
 399                 \r
 400                 $text = str_replace("[code]","[code]<?php",$text);\r
 401                 $text = str_replace("[/code]","?>[/code]",$text);\r
 402         \r
 403                 $text = preg_replace("/\[code\]\s*(.*)\s*\[\\/code\]/Usei", "highlight_code(fix_quotes('\\1'), $html)", $text);\r
 404                 // now remove the <?php added above and leave the syntax colour behind.\r
 405                 $text = str_replace("&lt;?php", "", $text);\r
 406                 $text = str_replace("?&gt;", "", $text);\r
 407         \r
 408                 return $text;\r
 409         }\r
 410 \r
 411         private static function imageReplace($text) {\r
 412                 /* image urls do not require http:// */\r
 413                 \r
 414         //      $text = eregi_replace("\[image(\|)?([[:alnum:][:space:]]*)\]" .\r
 415         //                                               "[:space:]*" .\r
 416         //                                               "([[:alnum:]#?/&=:\"'_.-]+)" .\r
 417         //                                               "[:space:]*" .\r
 418         //                                               "((\[/image\])|(.*\[/image\]))",\r
 419         //                                "<img src=\"\\3\" alt=\"\\2\" />",\r
 420         //                                $text);\r
 421                  \r
 422                 $text = preg_replace("/\[image(\|)?([a-zA-Z0-9\s]*)\]".\r
 423                                      "[\s]*".\r
 424                                      "([a-zA-Z0-9\#\?\/\&\=\:\\\"\'\_\.\-]+)[\s]*".\r
 425                                      "((\[\/image\])|(.*\[\/image\]))/i",\r
 426                                           "<img src=\"\\3\" alt=\"\\2\" />",\r
 427                                           $text);\r
 428                                           \r
 429                 return $text;\r
 430         }\r
 431         \r
 432         private static function formatFinalOutput($text, $nl2br = true) {\r
 433                 global $_base_path;\r
 434         \r
 435                 $text = str_replace('CONTENT_DIR/', '', $text);\r
 436                 if ($nl2br) {\r
 437                         return nl2br(ContentUtility::imageReplace(ContentUtility::makeClickable(ContentUtility::myCodes(' '.$text, false))));\r
 438                 }\r
 439         \r
 440                 return ContentUtility::imageReplace(ContentUtility::makeClickable(ContentUtility::myCodes(' '.$text, true)));\r
 441         }\r
 442 \r
 443         /**\r
 444         * This function converts the input string into AContent html content string \r
 445         * @access  public\r
 446         * @param   $input: input string\r
 447         *          $html: whether the input is in html\r
 448         * @return  converted AContent html content string\r
 449         * @author  Cindy Qi Li\r
 450         */\r
 451         public static function formatContent($input, $html = 0) {\r
 452                 global $_base_path, $_config;\r
 453         \r
 454                 if (!$html) {\r
 455                         $input = str_replace('<', '&lt;', $input);\r
 456                         $input = str_replace('&lt;?php', '<?php', $input); // for bug #2087\r
 457                 } elseif ($html==2) {\r
 458                         $output = '<iframe width="100%" frameborder="0" id="content_frame" marginheight="0" marginwidth="0" src="'.$input.'"></iframe>';\r
 459                         $output .=      '<script type="text/javascript">\r
 460                                                 function resizeIframe() {\r
 461                                                         var height = document.documentElement.clientHeight;\r
 462                                                         \r
 463                                                         // not sure how to get this dynamically\r
 464                                                         height -= 20; /* whatever you set your body bottom margin/padding to be */\r
 465                                                         \r
 466                                                         document.getElementById(\'content_frame\').style.height = height +"px";\r
 467                                                         \r
 468                                                 };\r
 469                                                 document.getElementById(\'content_frame\').onload = resizeIframe;\r
 470                                                 window.onresize = resizeIframe;\r
 471                                                 </script>';\r
 472                         return $output;\r
 473                 }\r
 474         \r
 475                 /* Commented by Cindy Qi Li on Jan 12, 2010\r
 476                  * AContent does not support glossary\r
 477                 // do the glossary search and replace:\r
 478                 if (is_array($glossary)) {\r
 479                         foreach ($glossary as $k => $v) {\r
 480                                 $k = urldecode($k);\r
 481                                 $v = str_replace("\n", '<br />', $v);\r
 482                                 $v = str_replace("\r", '', $v);\r
 483         \r
 484                                 // escape special characters\r
 485                                 $k = preg_quote($k);\r
 486         \r
 487                                 $k = str_replace('&lt;', '<', $k);\r
 488                                 $k = str_replace('/', '\/', $k);\r
 489         \r
 490                                 $original_term = $k;\r
 491                                 $term = $original_term;\r
 492         \r
 493                                 $term = '(\s*'.$term.'\s*)';\r
 494                                 $term = str_replace(' ','((<br \/>)*\s*)', $term); \r
 495         \r
 496                                 $def = htmlspecialchars($v, ENT_QUOTES, 'UTF-8');               \r
 497                                 if ($simple) {\r
 498                                         $input = preg_replace\r
 499                                                         ("/(\[\?\])$term(\[\/\?\])/i",\r
 500                                                         '<a href="'.$simple.'glossary.html#'.urlencode($original_term).'" target="body" class="at-term">\\2</a>',\r
 501                                                         $input);\r
 502                                 } else {\r
 503                                         $input = preg_replace\r
 504                                                         ("/(\[\?\])$term(\[\/\?\])/i",\r
 505                                                         '\\2<sup><a class="tooltip" href="'.$_base_path.'glossary/index.php?g_cid='.$_SESSION['s_cid'].htmlentities(SEP).'w='.urlencode($original_term).'#term" title="'.addslashes($original_term).': '.$def.'"><span style="color: blue; text-decoration: none;font-size:small; font-weight:bolder;">?</span></a></sup>',$input);\r
 506                                 }\r
 507                         }\r
 508                 } else if (!$user_glossary) {\r
 509                         $input = str_replace(array('[?]','[/?]'), '', $input);\r
 510                 }\r
 511                 */\r
 512 \r
 513                 \r
 514                 $input = str_replace('CONTENT_DIR', '', $input);\r
 515         \r
 516                 if (isset($_config['latex_server']) && $_config['latex_server']) {\r
 517                         // see: http://www.forkosh.com/mimetex.html\r
 518                         $input = preg_replace('/\[tex\](.*?)\[\/tex\]/sie', "'<img src=\"'.\$_config['latex_server'].rawurlencode('$1').'\" align=\"middle\">'", $input);\r
 519                 }\r
 520         \r
 521                 if ($html) {\r
 522                         $x = ContentUtility::formatFinalOutput($input, false);\r
 523                         return $x;\r
 524                 }\r
 525         \r
 526                 $output = ContentUtility::formatFinalOutput($input);\r
 527         \r
 528                 $output = '<p>'.$input.'</p>';\r
 529         \r
 530                 return $output;\r
 531         }\r
 532         \r
 533         /**\r
 534          * This function returns html string of "table of content"\r
 535          * @access: public\r
 536          * @param: $content: a string\r
 537          * @return: a html string of "table of content"\r
 538          */\r
 539         public static function getContentTable($content)\r
 540         {\r
 541                 preg_match_all("/<(h[\d]+)[^>]*>(.*)<\/(\s*)\\1(\s*)>/i", $content, $found_headers, PREG_SET_ORDER);\r
 542                 \r
 543                 if (count($found_headers) == 0) return array("", $content);\r
 544                 else\r
 545                 {\r
 546                         $num_of_headers = 0;\r
 547         \r
 548                         for ($i = 0; $i < count($found_headers); $i++)\r
 549                         {\r
 550                                 $div_id = "_header_" . $num_of_headers++;\r
 551                                 \r
 552                                 if ($i == 0)\r
 553                                 {\r
 554                                         $content_table = "<div id=\"toc\">\n<fieldset id=\"toc\"><legend>". _AT("table_of_contents")."</legend>\n";\r
 555                                 }\r
 556         \r
 557                                 $content = str_replace($found_headers[$i][0], '<div id="'.$div_id.'">'.$found_headers[$i][0].'</div>', $content);\r
 558                                 $content_table .= '<a href="'.$_SERVER["REQUEST_URI"].'#'.$div_id.'" class="'.$found_headers[$i][1].'">'. $found_headers[$i][2]."</a>\n";\r
 559         \r
 560                                 if ($i == count($found_headers) - 1)\r
 561                                 {\r
 562                                         $content_table .= "</fieldset></div><br />";\r
 563                                 }\r
 564                         }\r
 565                         return array($content_table, $content);\r
 566                 }\r
 567         }\r
 568         \r
 569         /**\r
 570          * This function returns an array of content tools' shortcuts\r
 571          * @access: public\r
 572          * @param: $content_row: an array of the current content information\r
 573          * @return: an array of all the tool short cuts that apply to the current content or content folder\r
 574          */\r
 575         public static function getToolShortcuts($content_row)\r
 576         {\r
 577                 global $_current_user, $_base_href, $contentManager, $_course_id;\r
 578                 \r
 579                 if (((!$content_row['content_parent_id'] && ($_SESSION['packaging'] == 'top'))\r
 580                       || ($_SESSION['packaging'] == 'all'))\r
 581                           || (isset($_current_user) && $_current_user->isAuthor($_course_id))) {\r
 582                 \r
 583                         $tool_shortcuts[] = array(\r
 584                                   'title' => _AT('export_content_in_cp'), \r
 585                                   'url' => $_base_href . 'home/ims/ims_export.php?_cid='.$content_row['content_id'],\r
 586                                   'icon' => $_base_href . 'themes/'.$_SESSION['prefs']['PREF_THEME'].'/images/export.png');\r
 587                         $tool_shortcuts[] = array(\r
 588                                   'title' => _AT('export_content_in_cc'), \r
 589                                   'url' => $_base_href . 'home/imscc/ims_export.php?_cid='.$content_row['content_id'].'&to_a4a=1',\r
 590                                   'icon' => $_base_href . 'themes/'.$_SESSION['prefs']['PREF_THEME'].'/images/export_cc.png');\r
 591                 }\r
 592                 \r
 593                 if (isset($_current_user) && $_current_user->isAuthor($_course_id)) {\r
 594                         if ($content_row['content_type'] == CONTENT_TYPE_CONTENT || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {\r
 595                                 $tool_shortcuts[] = array(\r
 596                                           'title' => _AT('edit_this_page'),   \r
 597                                            'url' => $_base_href . 'home/editor/edit_content.php?_cid='.$content_row['content_id'],\r
 598                                           'icon' => $_base_href . 'images/medit.gif');\r
 599                         }\r
 600                 \r
 601                         $tool_shortcuts[] = array(\r
 602                           'title' => _AT('add_sibling_folder'), \r
 603                           'url' => $_base_href .\r
 604                                 'home/editor/edit_content_folder.php?pid='.$contentManager->_menu_info[$content_row['content_id']]['content_parent_id'].SEP.'_course_id='.$_course_id,\r
 605                            'icon' => $_base_href . 'images/add_sibling_folder.gif');\r
 606 \r
 607                         if ($content_row['content_type'] == CONTENT_TYPE_FOLDER || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {\r
 608                                 $tool_shortcuts[] = array(\r
 609                                   'title' => _AT('add_sub_folder'), \r
 610                                   'url' => $_base_href .\r
 611                                         'home/editor/edit_content_folder.php?_course_id='.$_course_id.SEP.'pid='.$content_row['content_id'],\r
 612                                    'icon' => $_base_href . 'images/add_sub_folder.gif');\r
 613                         }\r
 614                         \r
 615                         $tool_shortcuts[] = array(\r
 616                           'title' => _AT('add_sibling_page'), \r
 617                           'url' => $_base_href .\r
 618                                 'home/editor/edit_content.php?pid='.$contentManager->_menu_info[$content_row['content_id']]['content_parent_id'].SEP.'_course_id='.$_course_id,\r
 619                           'icon' => $_base_href . 'images/add_sibling_page.gif');\r
 620                         \r
 621                         if ($content_row['content_type'] == CONTENT_TYPE_CONTENT || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {\r
 622                                 $tool_shortcuts[] = array(\r
 623                                   'title' => _AT('delete_this_page'),   \r
 624                                   'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$content_row['content_id'],\r
 625                                   'icon' => $_base_href . 'images/page_delete.gif');\r
 626                         }\r
 627                         else if ($content_row['content_type'] == CONTENT_TYPE_FOLDER) {\r
 628                                 $tool_shortcuts[] = array(\r
 629                                   'title' => _AT('add_sub_page'),       \r
 630                                   'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$content_row['content_id'],\r
 631                                   'icon' => $_base_href . 'images/add_sub_page.gif');\r
 632                                 \r
 633                                 $tool_shortcuts[] = array(\r
 634                                   'title' => _AT('delete_this_folder'),         \r
 635                                   'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$content_row['content_id'],\r
 636                                   'icon' => $_base_href . 'images/page_delete.gif');\r
 637                         }\r
 638                 }\r
 639                 return $tool_shortcuts;\r
 640 \r
 641 //      if (isset($_current_user) && $_current_user->isAuthor($_course_id)) {\r
 642 //              $shortcuts[] = array('title' => _AT('add_sub_folder'),   'url' => $_base_href . 'home/editor/edit_content_folder.php?_course_id='.$_course_id.'pid='.$cid);\r
 643 //              \r
 644 ////            $shortcuts[] = array('title' => _AT('add_top_page'),     'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id, 'icon' => $_base_href . 'images/page_add.gif');\r
 645 //              if ($contentManager->_menu_info[$cid]['content_parent_id']) {\r
 646 //                      $shortcuts[] = array('title' => _AT('add_sibling_page'), 'url' => $_base_href .\r
 647 //                              'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$contentManager->_menu_info[$cid]['content_parent_id'], 'icon' => $_base_href . 'images/page_add_sibling.gif');\r
 648 //              }\r
 649 //      \r
 650 //              $shortcuts[] = array('title' => _AT('add_sub_page'),     'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$cid);\r
 651 //              $shortcuts[] = array('title' => _AT('delete_this_folder'), 'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$cid, 'icon' => $_base_href . 'images/page_delete.gif');\r
 652 //      }\r
 653         }\r
 654         \r
 655         /**\r
 656         * replace source object with alternatives according to user's preferences\r
 657         * @access       public\r
 658         * @param        $cid:                           content id.\r
 659         * @param        $content:                       the original content page ($content_row['text'], from content.php).\r
 660         * @param    $info_only:         when "true", return the array of info (has_text_alternative, has_audio_alternative, has_visual_alternative, has_sign_lang_alternative)\r
 661         * @param    $only_on_secondary_type: \r
 662         * @return       string                          $content: the content page with the appropriated resources.\r
 663         * @see          $db                             from include/vitals.inc.php\r
 664         * @author       Cindy Qi Li\r
 665         */\r
 666         public static function applyAlternatives($cid, $content, $info_only = false, $only_on_secondary_type = 0){\r
 667                 global $db, $_course_id;\r
 668                 \r
 669                 include_once(TR_INCLUDE_PATH.'classes/DAO/DAO.class.php');\r
 670                 $dao = new DAO();\r
 671                 \r
 672                 $video_exts = array("mpg", "avi", "wmv", "mov", "swf", "mp3", "wav", "ogg", "mid", "mp4", "flv");\r
 673                 $txt_exts = array("txt", "html", "htm");\r
 674                 $image_exts = array("gif", "bmp", "png", "jpg", "jpeg", "png", "tif");\r
 675                 $only_on_secondary_type = intval($only_on_secondary_type);\r
 676                                 \r
 677                 // intialize the 4 returned values when $info_only is on\r
 678                 if ($info_only)\r
 679                 {\r
 680                         $has_text_alternative = false;\r
 681                         $has_audio_alternative = false;\r
 682                         $has_visual_alternative = false;\r
 683                         $has_sign_lang_alternative = false;\r
 684                 }\r
 685 \r
 686                 if (!$info_only && !$only_on_secondary_type && \r
 687                     ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_TEXT']==0) && \r
 688                     ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_AUDIO']==0) && \r
 689                     ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_VISUAL']==0)) \r
 690                 {\r
 691                         //No user's preferences related to content format are declared\r
 692                         if (!$info_only) {\r
 693                                 return $content;\r
 694                         } else {\r
 695                                 return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);\r
 696                         }\r
 697                 }\r
 698                 \r
 699                 // get all relations between primary resources and their alternatives\r
 700                 $sql = "SELECT c.content_path, pr.resource, prt.type_id primary_type, sr.secondary_resource, srt.type_id secondary_type\r
 701                           FROM ".TABLE_PREFIX."primary_resources pr, ".\r
 702                                  TABLE_PREFIX."primary_resources_types prt,".\r
 703                                  TABLE_PREFIX."secondary_resources sr,".\r
 704                                  TABLE_PREFIX."secondary_resources_types srt,".\r
 705                                  TABLE_PREFIX."content c\r
 706                          WHERE pr.content_id=".$cid."\r
 707                                AND pr.primary_resource_id = prt.primary_resource_id\r
 708                                AND pr.primary_resource_id = sr.primary_resource_id\r
 709                                AND sr.language_code='".$_SESSION['lang']."'\r
 710                                AND sr.secondary_resource_id = srt.secondary_resource_id\r
 711                            AND pr.content_id = c.content_id";\r
 712                 if ($only_on_secondary_type > 0) {\r
 713                         $sql .= " AND srt.type_id=".$only_on_secondary_type;\r
 714                 }\r
 715                 $sql .= " ORDER BY pr.primary_resource_id, prt.type_id";\r
 716                 \r
 717                 $rows = $dao->execute($sql);\r
 718         \r
 719                 if (!is_array($rows)) {\r
 720                         if (!$info_only) {\r
 721                                 return $content;\r
 722                         } else {\r
 723                                 return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);\r
 724                         }\r
 725                 }\r
 726                 \r
 727                 foreach ($rows as $row) \r
 728                 {\r
 729                         if ($info_only || $only_on_secondary_type ||\r
 730                             ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_TEXT']==1 && $row['primary_type']==3 &&\r
 731                             ($_SESSION['prefs']['PREF_ALT_TO_TEXT']=="audio" && $row['secondary_type']==1 || \r
 732                              $_SESSION['prefs']['PREF_ALT_TO_TEXT']=="visual" && $row['secondary_type']==4 || \r
 733                              $_SESSION['prefs']['PREF_ALT_TO_TEXT']=="sign_lang" && $row['secondary_type']==2)) ||\r
 734                              \r
 735                              ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_AUDIO']==1 && $row['primary_type']==1 &&\r
 736                              ($_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="visual" && $row['secondary_type']==4 || \r
 737                               $_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="text" && $row['secondary_type']==3 || \r
 738                               $_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="sign_lang" && $row['secondary_type']==2)) ||\r
 739                               \r
 740                              ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_VISUAL']==1 && $row['primary_type']==4 &&\r
 741                              ($_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="audio" && $row['secondary_type']==1 || \r
 742                               $_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="text" && $row['secondary_type']==3 || \r
 743                               $_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="sign_lang" && $row['secondary_type']==2))\r
 744                             )\r
 745                         {\r
 746                                 $ext = substr($row['secondary_resource'], strrpos($row['secondary_resource'], '.')+1);\r
 747                                 \r
 748                                 // alternative is video\r
 749                                 if (in_array($ext, $video_exts))\r
 750                                         $target = '[media]'.$row['secondary_resource'].'[/media]';\r
 751                                 // a text primary to be replaced by a visual alternative \r
 752                                 else if (in_array($ext, $txt_exts))\r
 753                                 {\r
 754                                         if ($row['content_path'] <> '') \r
 755                                                 $file_location = $row['content_path'].'/'.$row['secondary_resource'];\r
 756                                         else \r
 757                                                 $file_location = $row['secondary_resource'];\r
 758                                         \r
 759                                         $file = TR_CONTENT_DIR.$_SESSION['course_id'] . '/'.$file_location;\r
 760                                         $target = '<br />'.file_get_contents($file);\r
 761                                         \r
 762                                         // check whether html file\r
 763                                         if (preg_match('/.*\<html.*\<\/html\>.*/s', $target))\r
 764                                         { // is a html file, use iframe to display\r
 765                                                 // get real path to the text file\r
 766                                                 if (defined('TR_FORCE_GET_FILE') && TR_FORCE_GET_FILE) {\r
 767                                                         $course_base_href = 'get.php/';\r
 768                                                 } else {\r
 769                                                         $course_base_href = 'content/' . $_SESSION['course_id'] . '/';\r
 770                                                 }\r
 771                 \r
 772                                                 $file = TR_BASE_HREF . $course_base_href.$file_location;\r
 773                                                         \r
 774                                                 $target = '<iframe width="100%" frameborder="0" class="autoHeight" scrolling="auto" src="'.$file.'"></iframe>';\r
 775                                         }\r
 776                                         else\r
 777                                         { // is a text file, insert/replace into content\r
 778                                                 $target = nl2br($target);\r
 779                                         }\r
 780                                 } \r
 781                                 else if (in_array($ext, $image_exts))\r
 782                                         $target = '<img border="0" alt="'._AT('alternate_text').'" src="'.$row['secondary_resource'].'"/>';\r
 783                                 // otherwise\r
 784                                 else\r
 785                                         $target = '<p><a href="'.$row['secondary_resource'].'">'.$row['secondary_resource'].'</a></p>';\r
 786         \r
 787                                 // replace or append the target alternative to the source\r
 788                                 if (($row['primary_type']==3 && $_SESSION['prefs']['PREF_ALT_TO_TEXT_APPEND_OR_REPLACE'] == 'replace') ||\r
 789                                         ($row['primary_type']==1 && $_SESSION['prefs']['PREF_ALT_TO_AUDIO_APPEND_OR_REPLACE']=='replace') ||\r
 790                                         ($row['primary_type']==4 && $_SESSION['prefs']['PREF_ALT_TO_VISUAL_APPEND_OR_REPLACE']=='replace'))\r
 791                                         $pattern_replace_to = '${1}'.$target.'${3}';\r
 792                                 else\r
 793                                         $pattern_replace_to = '${1}${2}'.$target.'${3}';\r
 794         \r
 795                                 // *** Alternative replace/append starts from here ***\r
 796                                 $img_processed = false;    // The indicator to tell the source image is found (or not) \r
 797                                                            // and processed (or not) in an <img> tag. If found and processed, \r
 798                                                            // SKIP the found/process for <a> tag because the source is a image\r
 799                                                            // and <a> is very likely the tag wrapping around <img>\r
 800 \r
 801                                 // append/replace target alternative to [media]source[/media]\r
 802                                 if (preg_match("/".preg_quote("[media").".*".preg_quote("]".$row['resource']."[/media]", "/")."/sU", $content))\r
 803                                 {\r
 804                                         if (!$info_only) {\r
 805                                                 $content = preg_replace("/(.*)(".preg_quote("[media").".*".preg_quote("]".$row['resource']."[/media]", "/").")(.*)/sU", \r
 806                                              $pattern_replace_to, $content);\r
 807                                         } else {\r
 808                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 809                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 810                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 811                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 812                                         }\r
 813                                 }\r
 814                                 \r
 815                                 // append/replace target alternative to <img ... src="source" ...></a>\r
 816                                 if (preg_match("/\<img.*src=\"".preg_quote($row['resource'], "/")."\".*\/\>/sU", $content))\r
 817                                 {\r
 818                                         $img_processed = true;\r
 819                                         if (!$info_only) {\r
 820                                                 $content = preg_replace("/(.*)(\<img.*src=\"".preg_quote($row['resource'], "/")."\".*\/\>)(.*)/sU", \r
 821                                                         $pattern_replace_to, $content);\r
 822                                         } else {\r
 823                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 824                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 825                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 826                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 827                                         }\r
 828                                 }\r
 829                                 \r
 830                                 // append/replace target alternative to <a>...source...</a> or <a ...source...>...</a>\r
 831                                 // skip this "if" when the source object has been processed in aboved <img> tag\r
 832                                 if (!$img_processed && preg_match("/\<a.*".preg_quote($row['resource'], "/").".*\<\/a\>/sU", $content))\r
 833                                 {\r
 834                                         if (!$info_only) {\r
 835                                                 $content = preg_replace("/(.*)(\<a.*".preg_quote($row['resource'], "/").".*\<\/a\>)(.*)/sU", \r
 836                                                         $pattern_replace_to, $content);\r
 837                                         } else {\r
 838                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 839                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 840                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 841                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 842                                         }\r
 843                                 }\r
 844         \r
 845                                 // append/replace target alternative to <object ... source ...></object>\r
 846                                 if (preg_match("/\<object.*".preg_quote($row['resource'], "/").".*\<\/object\>/sU", $content))\r
 847                                 {\r
 848                                         if (!$info_only) {\r
 849                                                 $content = preg_replace("/(.*)(\<object.*".preg_quote($row['resource'], "/").".*\<\/object\>)(.*)/sU", \r
 850                                                         $pattern_replace_to, $content);\r
 851                                         } else {\r
 852                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 853                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 854                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 855                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 856                                         }\r
 857                                 }\r
 858         \r
 859                                 // append/replace target alternative to <embed ... source ...>\r
 860                                 if (preg_match("/\<embed.*".preg_quote($row['resource'], "/").".*\>/sU", $content))\r
 861                                 {\r
 862                                         if (!$info_only) {\r
 863                                                 $content = preg_replace("/(.*)(\<embed.*".preg_quote($row['resource'], "/").".*\>)(.*)/sU", \r
 864                                                         $pattern_replace_to, $content);\r
 865                                         } else {\r
 866                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 867                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 868                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 869                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 870                                         }\r
 871                                 }\r
 872                         }\r
 873                 }\r
 874                 \r
 875                 if (!$info_only) {\r
 876                         return $content;\r
 877                 } else {\r
 878                         return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);\r
 879                 }\r
 880         }       \r
 881                 \r
 882         /**\r
 883          * This function save the last content_id accessed by current user on a course into db and set $_SESSION['s_cid']\r
 884          * @access: public\r
 885          * @param: $content_id\r
 886          * @return: save $content_id, the last visited one of the current user, into db and session\r
 887          */\r
 888         public static function saveLastCid($content_id)\r
 889         {\r
 890                 global $_course_id;\r
 891                 \r
 892                 if (!$content_id || !isset($_SESSION['user_id'])) return;\r
 893                 \r
 894                 include_once(TR_INCLUDE_PATH.'classes/DAO/UserCoursesDAO.class.php');\r
 895                 \r
 896                 $userCoursesDAO = new UserCoursesDAO();\r
 897                 if ($userCoursesDAO->isExist($_SESSION['user_id'], $_course_id))\r
 898                 {\r
 899                         $userCoursesDAO->UpdateLastCid($_SESSION['user_id'], $_course_id, $content_id);\r
 900                         $_SESSION['s_cid'] = $content_id;\r
 901                 }\r
 902         }\r
 903 }\r
 904 ?>