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                 $media_replace = array();\r
 144                 $media_matches = array();\r
 145                 \r
 146                 // .flv (playing file via full URL)\r
 147                 preg_match_all("#\[media[0-9a-z\|]*\]http://([\w\./-]+)\.flv\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);\r
 148                 $media_replace[] ="<a class=\"flowplayerholder\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"http://##MEDIA1##.flv\"></a>";\r
 149                 \r
 150                 // .flv (playing file from TR_content_dir)\r
 151                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+)\.flv\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);\r
 152                 $media_replace[] ="<a class=\"flowplayerholder\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"".TR_BASE_HREF."get.php/".$content_base_href."##MEDIA1##.flv\"></a>";\r
 153                 \r
 154                 // .mp4 (playing file via full URL)\r
 155                 preg_match_all("#\[media[0-9a-z\|]*\]http://([\w\./-]+)\.mp4\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);\r
 156                 $media_replace[] ="<a class=\"flowplayerholder\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"http://##MEDIA1##.mp4\"></a>";\r
 157                 \r
 158                 // .mp4 (playing file from TR_content_dir)\r
 159                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+)\.mp4\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);\r
 160                 $media_replace[] ="<a class=\"flowplayerholder\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"".TR_BASE_HREF."get.php/".$content_base_href."##MEDIA1##.mp4\"></a>";\r
 161                 \r
 162                 // .mov (playing file via full URL)\r
 163                 preg_match_all("#\[media[0-9a-z\|]*\]http://([\w\./-]+)\.mov\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);\r
 164                 $media_replace[] ="<a class=\"flowplayerholder\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"http://##MEDIA1##.mov\"></a>";\r
 165                 \r
 166                 // .mov (playing file from TR_content_dir)\r
 167                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+)\.mov\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);\r
 168                 $media_replace[] ="<a class=\"flowplayerholder\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"".TR_BASE_HREF."get.php/".$content_base_href."##MEDIA1##.mov\"></a>";\r
 169                 \r
 170                 // .mp3 (playing file via full URL)\r
 171                 preg_match_all("#\[media[0-9a-z\|]*\]http://([\w\./-]+)\.mp3\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);\r
 172                 $media_replace[] ="<a class=\"flowplayerholder\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"http://##MEDIA1##.mp3\"></a>";\r
 173                 \r
 174                 // .mp3 (playing file from TR_content_dir)\r
 175                 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+)\.mp3\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);\r
 176                 $media_replace[] ="<a class=\"flowplayerholder\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"".TR_BASE_HREF."get.php/".$content_base_href."##MEDIA1##.mp3\"></a>";\r
 177                 \r
 178                 $has_flv = false;\r
 179                 // Executing the replace\r
 180                 for ($i=0;$i<count($media_replace);$i++){\r
 181                         foreach($media_matches[$i] as $media)\r
 182                         {\r
 183                                 if (is_array($media)) $has_flv = true;\r
 184                                 \r
 185                                 //find width and height for each matched media\r
 186                                 if (preg_match("/\[media\|([0-9]*)\|([0-9]*)\]*/", $media[0], $matches)) \r
 187                                 {\r
 188                                         $width = $matches[1];\r
 189                                         $height = $matches[2];\r
 190                                 }\r
 191                                 else\r
 192                                 {\r
 193                                         $width = 425;\r
 194                                         $height = 350;\r
 195                                 }\r
 196                                 \r
 197                                 //replace media tags with embedded media for each media tag\r
 198                                 $media_input = $media_replace[$i];\r
 199                                 $media_input = str_replace("##WIDTH##","$width",$media_input);\r
 200                                 $media_input = str_replace("##HEIGHT##","$height",$media_input);\r
 201                                 $media_input = str_replace("##MEDIA1##","$media[1]",$media_input);\r
 202                                 $media_input = str_replace("##MEDIA2##","$media[2]",$media_input);\r
 203                                 $text = str_replace($media[0],$media_input,$text);\r
 204                         }\r
 205                 }\r
 206                 \r
 207                 if ($has_flv)\r
 208                 {\r
 209                         $text .= '\r
 210                         <script language="JavaScript">\r
 211                                 $f("a.flowplayerholder", "'.TR_BASE_HREF.'include/jscripts/flowplayer/flowplayer-3.2.5.swf", { \r
 212                                         clip: { autoPlay: false },              \r
 213                                 plugins:  { \r
 214                                         controls: { \r
 215                                             all: false,  \r
 216                                             play: true,  \r
 217                                             scrubber: true \r
 218                                         }         \r
 219                                     }\r
 220                                 });\r
 221                         </script>\r
 222                         ';\r
 223                 }\r
 224                 \r
 225                 return $text;           \r
 226         }\r
 227         \r
 228     /*\r
 229      * This function converts the youtube playable url used in <object> tag (for instance: http://www.youtube.com/v/a0ryB0m0MiM)\r
 230      * to youtube url that is used to browse (for instance: http://www.youtube.com/watch?v=a0ryB0m0MiM)\r
 231      * @param: youtube playable URL. For instance, http://www.youtube.com/v/a0ryB0m0MiM\r
 232      * @return: if the param is a youtube playable url, return the according youtube URL used to browse. \r
 233      *          For instance: http://www.youtube.com/watch?v=a0ryB0m0MiM\r
 234      *          Otherwise, return the original send-in parameter.\r
 235      */\r
 236     function convertYoutubePlayURLToWatchURL($youtube_playURL) {\r
 237         return preg_replace("/(http:\/\/[a-z0-9\.]*)?youtube.com\/v\/(.*)/",\r
 238                             "\\1youtube.com/watch?v=\\2", $youtube_playURL);\r
 239     }\r
 240 \r
 241     /*\r
 242      * This function converts the youtube url that is used to browse (for instance: http://www.youtube.com/watch?v=a0ryB0m0MiM)\r
 243      * to youtube playable url used in <object> tag (for instance: http://www.youtube.com/v/a0ryB0m0MiM)\r
 244      * @param: the youtube URL used to browse. \r
 245      *         For instance: http://www.youtube.com/watch?v=a0ryB0m0MiM\r
 246      * @return: if the param is a youtube url used to browse, return the according youtube playable URL. \r
 247      *          For instance, http://www.youtube.com/v/a0ryB0m0MiM\r
 248      *          Otherwise, return the original send-in parameter.\r
 249      */\r
 250     function convertYoutubeWatchURLToPlayURL($youtube_watchURL) {\r
 251         return preg_replace("/(http:\/\/[a-z0-9\.]*)?youtube.com\/watch\?v=(.*)/",\r
 252                             "\\1youtube.com/v/\\2", $youtube_watchURL);\r
 253     }\r
 254 \r
 255         public static function embedMedia($text) {\r
 256                 if (preg_match("/\[media(\|[0-9]+\|[0-9]+)?\]*/", $text)==0){\r
 257                         return $text;\r
 258                 }\r
 259         \r
 260                 // remove the spaces in [media] tag, otherwise, the next line converts URL inside [media] into <a> tag\r
 261                 $text = preg_replace("/(\[media\])([\s]*)(.*)(\[\/media\])/", '$1$3$4', $text);\r
 262                 $text = preg_replace("/(\[media\])(.*)([\s]*)(\[\/media\])/U", '$1$2$4', $text);\r
 263                 \r
 264                 $media_matches = Array();\r
 265                 \r
 266                 // First, we search though the text for all different kinds of media defined by media tags and store the results in $media_matches.\r
 267         // Then the different replacements for the different media tags are stored in $media_replace.\r
 268         // 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
 269                 \r
 270                 // youtube videos\r
 271         preg_match_all("#\[media[0-9a-z\|]*\]http://([a-z0-9\.]*)?youtube.com/watch\?v=(.*)\[/media\]#iU",$text,$media_matches[1],PREG_SET_ORDER);\r
 272         $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
 273                                 \r
 274                 // .mpg\r
 275                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mpg\[/media\]#i",$text,$media_matches[2],PREG_SET_ORDER);\r
 276                 $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
 277                 \r
 278                 // .avi\r
 279                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).avi\[/media\]#i",$text,$media_matches[3],PREG_SET_ORDER);\r
 280                 $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
 281                 \r
 282                 // .wmv\r
 283                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).wmv\[/media\]#i",$text,$media_matches[4],PREG_SET_ORDER);\r
 284                 $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
 285                 \r
 286                 // .swf\r
 287                 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).swf\[/media\]#i",$text,$media_matches[5],PREG_SET_ORDER);\r
 288                 $media_replace[5] = "<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
 289                 \r
 290                 // .wav\r
 291                 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).wav\[/media\]#i",$text,$media_matches[6],PREG_SET_ORDER);\r
 292                 $media_replace[6] ="<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
 293                 \r
 294                 // .ogg\r
 295                 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).ogg\[/media\]#i",$text,$media_matches[7],PREG_SET_ORDER);\r
 296                 $media_replace[7] ="<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
 297 \r
 298         // .ogm\r
 299         preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).ogm\[/media\]#i",$text,$media_matches[8],PREG_SET_ORDER);\r
 300         $media_replace[8] ="<object type=\"application/ogm\" data=\"##MEDIA1##.ogm\" width=\"##WIDTH##\" height=\"##HEIGHT##\"><param name=\"src\" value=\"##MEDIA1##.ogm\"><a href=\"##MEDIA1##.ogg\">##MEDIA1##.ogm</a></object>";\r
 301                 \r
 302                 // .mid\r
 303                 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).mid\[/media\]#i",$text,$media_matches[9],PREG_SET_ORDER);\r
 304                 $media_replace[9] ="<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
 305                 \r
 306                 $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>", $text);\r
 307         \r
 308                 // Executing the replace\r
 309                 for ($i=1;$i<=count($media_replace);$i++){\r
 310                         foreach($media_matches[$i] as $media)\r
 311                         {\r
 312                                 \r
 313                                 //find width and height for each matched media\r
 314                                 if (preg_match("/\[media\|([0-9]*)\|([0-9]*)\]*/", $media[0], $matches)) \r
 315                                 {\r
 316                                         $width = $matches[1];\r
 317                                         $height = $matches[2];\r
 318                                 }\r
 319                                 else\r
 320                                 {\r
 321                                         $width = 425;\r
 322                                         $height = 350;\r
 323                                 }\r
 324                                 \r
 325                                 //replace media tags with embedded media for each media tag\r
 326                                 $media_input = $media_replace[$i];\r
 327                                 $media_input = str_replace("##WIDTH##","$width",$media_input);\r
 328                                 $media_input = str_replace("##HEIGHT##","$height",$media_input);\r
 329                                 $media_input = str_replace("##MEDIA1##","$media[1]",$media_input);\r
 330                                 $media_input = str_replace("##MEDIA2##","$media[2]",$media_input);\r
 331                                 $text = str_replace($media[0],$media_input,$text);\r
 332                         }\r
 333                 }\r
 334                 \r
 335                 return $text;\r
 336         }\r
 337 \r
 338         public static function makeClickable($text) {\r
 339                 $text = ContentUtility::embedMedia($text);\r
 340         \r
 341                 // convert plain text URL to clickable URL.\r
 342                 // Limited conversion: It doesn't cover the case when the stuff in front of the URL is not a word. For example:\r
 343                 // <p>http://google.ca</p>\r
 344                 // "http://google.ca" \r
 345                 $text = preg_replace('/(^|[\n ])([\w]*?)((?<!(\[media\]))http(s)?:\/\/[\w]+[^ \,\"\n\r\t\)<]*)/is', \r
 346                                      '$1$2<a href="$3">$3</a>', $text);\r
 347                 \r
 348                 // convert email address to clickable URL that pops up "send email" interface with the address filled in\r
 349                 $text = preg_replace('/(?|<a href="mailto[\s]*:[\s]*([_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'\@'\r
 350                                     .'[_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'(\.[a-zA-Z]{1,6})+)">(.*)<\/a>'\r
 351                                     .'|((((([_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'\@'\r
 352                                     .'[_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'(\.[a-zA-Z]{1,6})+))))))/i',\r
 353                                                         "<a href=\"mailto:\\1\">\\5</a>",\r
 354                                                         $text);\r
 355                 \r
 356                 // flv conversion needs to come after url conversion (2 lines above) otherwise the url to flowplayer swf file\r
 357                 // in the script for a.flowplayerholder is converted\r
 358                 $text = ContentUtility::embedFLV($text);\r
 359                 \r
 360                 return $text;\r
 361         }\r
 362 \r
 363         public static function myCodes($text, $html = false) {\r
 364                 global $_base_path;\r
 365                 global $HTTP_USER_AGENT;\r
 366         \r
 367                 if (substr($HTTP_USER_AGENT,0,11) == 'Mozilla/4.7') {\r
 368                         $text = str_replace('[quote]','</p><p class="block">',$text);\r
 369                         $text = str_replace('[/quote]','</p><p>',$text);\r
 370         \r
 371                         $text = str_replace('[reply]','</p><p class="block">',$text);\r
 372                         $text = str_replace('[/reply]','</p><p>',$text);\r
 373                 } else {\r
 374                         $text = str_replace('[quote]','<blockquote>',$text);\r
 375                         $text = str_replace('[/quote]','</blockquote><p>',$text);\r
 376         \r
 377                         $text = str_replace('[reply]','</p><blockquote class="block"><p>',$text);\r
 378                         $text = str_replace('[/reply]','</p></blockquote><p>',$text);\r
 379                 }\r
 380         \r
 381                 $text = str_replace('[b]','<strong>',$text);\r
 382                 $text = str_replace('[/b]','</strong>',$text);\r
 383         \r
 384                 $text = str_replace('[i]','<em>',$text);\r
 385                 $text = str_replace('[/i]','</em>',$text);\r
 386         \r
 387                 $text = str_replace('[u]','<u>',$text);\r
 388                 $text = str_replace('[/u]','</u>',$text);\r
 389         \r
 390                 $text = str_replace('[center]','<center>',$text);\r
 391                 $text = str_replace('[/center]','</center><p>',$text);\r
 392         \r
 393                 /* colours */\r
 394                 $text = str_replace('[blue]','<span style="color: blue;">',$text);\r
 395                 $text = str_replace('[/blue]','</span>',$text);\r
 396         \r
 397                 $text = str_replace('[orange]','<span style="color: orange;">',$text);\r
 398                 $text = str_replace('[/orange]','</span>',$text);\r
 399         \r
 400                 $text = str_replace('[red]','<span style="color: red;">',$text);\r
 401                 $text = str_replace('[/red]','</span>',$text);\r
 402         \r
 403                 $text = str_replace('[purple]','<span style="color: purple;">',$text);\r
 404                 $text = str_replace('[/purple]','</span>',$text);\r
 405         \r
 406                 $text = str_replace('[green]','<span style="color: green;">',$text);\r
 407                 $text = str_replace('[/green]','</span>',$text);\r
 408         \r
 409                 $text = str_replace('[gray]','<span style="color: gray;">',$text);\r
 410                 $text = str_replace('[/gray]','</span>',$text);\r
 411         \r
 412                 $text = str_replace('[op]','<span class="bigspacer"></span> <a href="',$text);\r
 413                 $text = str_replace('[/op]','">'._AT('view_entire_post').'</a>',$text);\r
 414         \r
 415                 $text = str_replace('[head1]','<h2>',$text);\r
 416                 $text = str_replace('[/head1]','</h2>',$text);\r
 417         \r
 418                 $text = str_replace('[head2]','<h3>',$text);\r
 419                 $text = str_replace('[/head2]','</h3>',$text);\r
 420         \r
 421                 $text = str_replace('[cid]',$_base_path.'content.php?_cid='.$_SESSION['s_cid'],$text);\r
 422         \r
 423                 global $sequence_links, $_course_id, $_content_id;\r
 424                 if ($_course_id > 0 && !isset($sequence_links) && $_content_id > 0) {\r
 425                         global $contentManager;\r
 426                         $sequence_links = $contentManager->generateSequenceCrumbs($_content_id);\r
 427                 }\r
 428                 if (isset($sequence_links['previous']) && $sequence_links['previous']['url']) {\r
 429                         $text = str_replace('[pid]', $sequence_links['previous']['url'], $text);\r
 430                 }\r
 431                 if (isset($sequence_links['next']) && $sequence_links['next']['url']) {\r
 432                         $text = str_replace('[nid]', $sequence_links['next']['url'], $text);\r
 433                 }\r
 434                 if (isset($sequence_links['resume']) && $sequence_links['resume']['url']) {\r
 435                         $text = str_replace('[nid]', $sequence_links['resume']['url'], $text);\r
 436                 }\r
 437                 if (isset($sequence_links['first']) && $sequence_links['first']['url']) {\r
 438                         $text = str_replace('[fid]', $sequence_links['first']['url'], $text);\r
 439                 }\r
 440         \r
 441                 /* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */\r
 442             $html = !$html ? 0 : 1;\r
 443             \r
 444                 // little hack added by greg to add syntax highlighting without using <?php \?\>\r
 445                 \r
 446                 $text = str_replace("[code]","[code]<?php",$text);\r
 447                 $text = str_replace("[/code]","?>[/code]",$text);\r
 448         \r
 449                 $text = preg_replace("/\[code\]\s*(.*)\s*\[\\/code\]/Usei", "ContentUtility::highlightCode(ContentUtility::fixQuotes('\\1'), $html)", $text);\r
 450                 // now remove the <?php added above and leave the syntax colour behind.\r
 451                 $text = str_replace("&lt;?php", "", $text);\r
 452                 $text = str_replace("?&gt;", "", $text);\r
 453         \r
 454                 return $text;\r
 455         }\r
 456 \r
 457         /* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */\r
 458         private static function highlightCode($code, $html) {\r
 459                 // XHTMLize PHP highlight_string output until it gets fixed in PHP\r
 460                 static $search = array(\r
 461                         '<br>',\r
 462                         '<font',\r
 463                         '</font>',\r
 464                         'color="');\r
 465         \r
 466                 static $replace = array(\r
 467                         '<br />',\r
 468                         '<span',\r
 469                         '</span>',\r
 470                         'style="color:');\r
 471                 if (!$html) {\r
 472                         $code = str_replace('&lt;', '<', $code);\r
 473                         $code = str_replace("\r", '', $code);\r
 474                 }\r
 475         \r
 476                 return str_replace($search, $replace, highlight_string($code, true));\r
 477         }\r
 478         \r
 479         /* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */\r
 480         private static function fixQuotes($text){\r
 481                 return str_replace('\\"', '"', $text);\r
 482         }\r
 483 \r
 484         public static function imageReplace($text) {\r
 485                 /* image urls do not require http:// */\r
 486                 \r
 487         //      $text = eregi_replace("\[image(\|)?([[:alnum:][:space:]]*)\]" .\r
 488         //                                               "[:space:]*" .\r
 489         //                                               "([[:alnum:]#?/&=:\"'_.-]+)" .\r
 490         //                                               "[:space:]*" .\r
 491         //                                               "((\[/image\])|(.*\[/image\]))",\r
 492         //                                "<img src=\"\\3\" alt=\"\\2\" />",\r
 493         //                                $text);\r
 494                  \r
 495                 $text = preg_replace("/\[image(\|)?([a-zA-Z0-9\s]*)\]".\r
 496                                      "[\s]*".\r
 497                                      "([a-zA-Z0-9\#\?\/\&\=\:\\\"\'\_\.\-]+)[\s]*".\r
 498                                      "((\[\/image\])|(.*\[\/image\]))/i",\r
 499                                           "<img src=\"\\3\" alt=\"\\2\" />",\r
 500                                           $text);\r
 501                                           \r
 502                 return $text;\r
 503         }\r
 504         \r
 505         private static function formatFinalOutput($text, $nl2br = true) {\r
 506                 global $_base_path;\r
 507         \r
 508                 $text = str_replace('CONTENT_DIR/', '', $text);\r
 509                 if ($nl2br) {\r
 510                         return nl2br(ContentUtility::imageReplace(ContentUtility::makeClickable(ContentUtility::myCodes(' '.$text, false))));\r
 511                 }\r
 512         \r
 513                 return ContentUtility::imageReplace(ContentUtility::makeClickable(ContentUtility::myCodes(' '.$text, true)));\r
 514         }\r
 515 \r
 516         /**\r
 517         * This function converts the input string into AContent html content string \r
 518         * @access  public\r
 519         * @param   $input: input string\r
 520         *          $html: whether the input is in html\r
 521         * @return  converted AContent html content string\r
 522         * @author  Cindy Qi Li\r
 523         */\r
 524         public static function formatContent($input, $html = 0) {\r
 525                 global $_base_path, $_config;\r
 526         \r
 527                 if (!$html) {\r
 528                         $input = str_replace('<', '&lt;', $input);\r
 529                         $input = str_replace('&lt;?php', '<?php', $input); // for bug #2087\r
 530                 } elseif ($html==2) {\r
 531                         $output = '<iframe width="100%" frameborder="0" id="content_frame" marginheight="0" marginwidth="0" src="'.$input.'"></iframe>';\r
 532                         $output .=      '<script type="text/javascript">\r
 533                                                 function resizeIframe() {\r
 534                                                         var height = document.documentElement.clientHeight;\r
 535                                                         \r
 536                                                         // not sure how to get this dynamically\r
 537                                                         height -= 20; /* whatever you set your body bottom margin/padding to be */\r
 538                                                         \r
 539                                                         document.getElementById(\'content_frame\').style.height = height +"px";\r
 540                                                         \r
 541                                                 };\r
 542                                                 document.getElementById(\'content_frame\').onload = resizeIframe;\r
 543                                                 window.onresize = resizeIframe;\r
 544                                                 </script>';\r
 545                         return $output;\r
 546                 }\r
 547         \r
 548                 /* Commented by Cindy Qi Li on Jan 12, 2010\r
 549                  * AContent does not support glossary\r
 550                 // do the glossary search and replace:\r
 551                 if (is_array($glossary)) {\r
 552                         foreach ($glossary as $k => $v) {\r
 553                                 $k = urldecode($k);\r
 554                                 $v = str_replace("\n", '<br />', $v);\r
 555                                 $v = str_replace("\r", '', $v);\r
 556         \r
 557                                 // escape special characters\r
 558                                 $k = preg_quote($k);\r
 559         \r
 560                                 $k = str_replace('&lt;', '<', $k);\r
 561                                 $k = str_replace('/', '\/', $k);\r
 562         \r
 563                                 $original_term = $k;\r
 564                                 $term = $original_term;\r
 565         \r
 566                                 $term = '(\s*'.$term.'\s*)';\r
 567                                 $term = str_replace(' ','((<br \/>)*\s*)', $term); \r
 568         \r
 569                                 $def = htmlspecialchars($v, ENT_QUOTES, 'UTF-8');               \r
 570                                 if ($simple) {\r
 571                                         $input = preg_replace\r
 572                                                         ("/(\[\?\])$term(\[\/\?\])/i",\r
 573                                                         '<a href="'.$simple.'glossary.html#'.urlencode($original_term).'" target="body" class="at-term">\\2</a>',\r
 574                                                         $input);\r
 575                                 } else {\r
 576                                         $input = preg_replace\r
 577                                                 ("/(\[\?\])$term(\[\/\?\])/i",\r
 578                                                 '\\2<sup><a class="tooltip" href="'.$_base_path.'mods/_core/glossary/index.php?g_cid='.$_SESSION['s_cid'].htmlentities(SEP).'w='.urlencode($original_term).'#term" title="'.addslashes($original_term).': '.$def.'">?</a></sup>',$input);\r
 579                                 }\r
 580                         }\r
 581                 } else if (!$user_glossary) {\r
 582                         $input = str_replace(array('[?]','[/?]'), '', $input);\r
 583                 }\r
 584                 */\r
 585 \r
 586                 \r
 587                 $input = str_replace('CONTENT_DIR', '', $input);\r
 588         \r
 589                 if (isset($_config['latex_server']) && $_config['latex_server']) {\r
 590                         // see: http://www.forkosh.com/mimetex.html\r
 591                         $input = preg_replace('/\[tex\](.*?)\[\/tex\]/sie', "'<img src=\"'.\$_config['latex_server'].rawurlencode('$1').'\" align=\"middle\">'", $input);\r
 592                 }\r
 593         \r
 594                 if ($html) {\r
 595                         $x = ContentUtility::formatFinalOutput($input, false);\r
 596                         return $x;\r
 597                 }\r
 598         \r
 599                 $output = ContentUtility::formatFinalOutput($input);\r
 600         \r
 601                 $output = '<p>'.$input.'</p>';\r
 602         \r
 603                 return $output;\r
 604         }\r
 605         \r
 606         /**\r
 607          * This function returns html string of "table of content"\r
 608          * @access: public\r
 609          * @param: $content: a string\r
 610          * @return: a html string of "table of content"\r
 611          */\r
 612         public static function getContentTable($content)\r
 613         {\r
 614                 preg_match_all("/<(h[\d]+)[^>]*>(.*)<\/(\s*)\\1(\s*)>/i", $content, $found_headers, PREG_SET_ORDER);\r
 615                 \r
 616                 if (count($found_headers) == 0) return array("", $content);\r
 617                 else\r
 618                 {\r
 619                         $num_of_headers = 0;\r
 620         \r
 621                         for ($i = 0; $i < count($found_headers); $i++)\r
 622                         {\r
 623                                 $div_id = "_header_" . $num_of_headers++;\r
 624                                 \r
 625                                 if ($i == 0)\r
 626                                 {\r
 627                                         $content_table = "<div id=\"toc\">\n<fieldset id=\"toc\"><legend>". _AT("table_of_contents")."</legend>\n";\r
 628                                 }\r
 629         \r
 630                                 $content = str_replace($found_headers[$i][0], '<div id="'.$div_id.'">'.$found_headers[$i][0].'</div>', $content);\r
 631                                 $content_table .= '<a href="'.$_SERVER["REQUEST_URI"].'#'.$div_id.'" class="'.$found_headers[$i][1].'">'. $found_headers[$i][2]."</a>\n";\r
 632         \r
 633                                 if ($i == count($found_headers) - 1)\r
 634                                 {\r
 635                                         $content_table .= "</fieldset></div><br />";\r
 636                                 }\r
 637                         }\r
 638                         return array($content_table, $content);\r
 639                 }\r
 640         }\r
 641         \r
 642         /**\r
 643          * This function returns an array of content tools' shortcuts\r
 644          * @access: public\r
 645          * @param: $content_row: an array of the current content information\r
 646          * @return: an array of all the tool short cuts that apply to the current content or content folder\r
 647          */\r
 648         public static function getToolShortcuts($content_row)\r
 649         {\r
 650                 global $_current_user, $_base_href, $contentManager, $_course_id;\r
 651                 \r
 652                 if (((!$content_row['content_parent_id'] && ($_SESSION['packaging'] == 'top'))\r
 653                       || ($_SESSION['packaging'] == 'all'))\r
 654                           || (isset($_current_user) && $_current_user->isAuthor($_course_id))) {\r
 655                 \r
 656                         $tool_shortcuts[] = array(\r
 657                                   'title' => _AT('export_content_in_cp'), \r
 658                                   'url' => $_base_href . 'home/ims/ims_export.php?_cid='.$content_row['content_id'],\r
 659                                   'icon' => $_base_href . 'themes/'.$_SESSION['prefs']['PREF_THEME'].'/images/export.png');\r
 660                         $tool_shortcuts[] = array(\r
 661                                   'title' => _AT('export_content_in_cc'), \r
 662                                   'url' => $_base_href . 'home/imscc/ims_export.php?_cid='.$content_row['content_id'].SEP.'to_a4a=1',\r
 663                                   'icon' => $_base_href . 'themes/'.$_SESSION['prefs']['PREF_THEME'].'/images/export_cc.png');\r
 664                 }\r
 665                 \r
 666                 if (isset($_current_user) && $_current_user->isAuthor($_course_id)) {\r
 667                         if ($content_row['content_type'] == CONTENT_TYPE_CONTENT || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {\r
 668                                 $tool_shortcuts[] = array(\r
 669                                           'title' => _AT('edit_this_page'),   \r
 670                                            'url' => $_base_href . 'home/editor/edit_content.php?_cid='.$content_row['content_id'],\r
 671                                           'icon' => $_base_href . 'images/medit.gif');\r
 672                         }\r
 673                 \r
 674                         $tool_shortcuts[] = array(\r
 675                           'title' => _AT('add_sibling_folder'), \r
 676                           'url' => $_base_href .\r
 677                                 'home/editor/edit_content_folder.php?pid='.$contentManager->_menu_info[$content_row['content_id']]['content_parent_id'].SEP.'_course_id='.$_course_id,\r
 678                            'icon' => $_base_href . 'images/add_sibling_folder.gif');\r
 679 \r
 680                         if ($content_row['content_type'] == CONTENT_TYPE_FOLDER || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {\r
 681                                 $tool_shortcuts[] = array(\r
 682                                   'title' => _AT('add_sub_folder'), \r
 683                                   'url' => $_base_href .\r
 684                                         'home/editor/edit_content_folder.php?_course_id='.$_course_id.SEP.'pid='.$content_row['content_id'],\r
 685                                    'icon' => $_base_href . 'images/add_sub_folder.gif');\r
 686                         }\r
 687                         \r
 688                         $tool_shortcuts[] = array(\r
 689                           'title' => _AT('add_sibling_page'), \r
 690                           'url' => $_base_href .\r
 691                                 'home/editor/edit_content.php?pid='.$contentManager->_menu_info[$content_row['content_id']]['content_parent_id'].SEP.'_course_id='.$_course_id,\r
 692                           'icon' => $_base_href . 'images/add_sibling_page.gif');\r
 693                         \r
 694                         if ($content_row['content_type'] == CONTENT_TYPE_CONTENT || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {\r
 695                                 $tool_shortcuts[] = array(\r
 696                                   'title' => _AT('delete_this_page'),   \r
 697                                   'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$content_row['content_id'],\r
 698                                   'icon' => $_base_href . 'images/page_delete.gif');\r
 699                         }\r
 700                         else if ($content_row['content_type'] == CONTENT_TYPE_FOLDER) {\r
 701                                 $tool_shortcuts[] = array(\r
 702                                   'title' => _AT('add_sub_page'),       \r
 703                                   'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$content_row['content_id'],\r
 704                                   'icon' => $_base_href . 'images/add_sub_page.gif');\r
 705                                 \r
 706                                 $tool_shortcuts[] = array(\r
 707                                   'title' => _AT('delete_this_folder'),         \r
 708                                   'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$content_row['content_id'],\r
 709                                   'icon' => $_base_href . 'images/page_delete.gif');\r
 710                         }\r
 711                 }\r
 712                 return $tool_shortcuts;\r
 713 \r
 714 //      if (isset($_current_user) && $_current_user->isAuthor($_course_id)) {\r
 715 //              $shortcuts[] = array('title' => _AT('add_sub_folder'),   'url' => $_base_href . 'home/editor/edit_content_folder.php?_course_id='.$_course_id.'pid='.$cid);\r
 716 //              \r
 717 ////            $shortcuts[] = array('title' => _AT('add_top_page'),     'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id, 'icon' => $_base_href . 'images/page_add.gif');\r
 718 //              if ($contentManager->_menu_info[$cid]['content_parent_id']) {\r
 719 //                      $shortcuts[] = array('title' => _AT('add_sibling_page'), 'url' => $_base_href .\r
 720 //                              'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$contentManager->_menu_info[$cid]['content_parent_id'], 'icon' => $_base_href . 'images/page_add_sibling.gif');\r
 721 //              }\r
 722 //      \r
 723 //              $shortcuts[] = array('title' => _AT('add_sub_page'),     'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$cid);\r
 724 //              $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
 725 //      }\r
 726         }\r
 727         \r
 728         /**\r
 729         * replace source object with alternatives according to user's preferences\r
 730         * @access       public\r
 731         * @param        $cid:                           content id.\r
 732         * @param        $content:                       the original content page ($content_row['text'], from content.php).\r
 733         * @param    $info_only:         when "true", return the array of info (has_text_alternative, has_audio_alternative, has_visual_alternative, has_sign_lang_alternative)\r
 734         * @param    $only_on_secondary_type: \r
 735         * @return       string                          $content: the content page with the appropriated resources.\r
 736         * @see          $db                             from include/vitals.inc.php\r
 737         * @author       Cindy Qi Li\r
 738         */\r
 739         public static function applyAlternatives($cid, $content, $info_only = false, $only_on_secondary_type = 0){\r
 740                 global $db, $_course_id;\r
 741                 \r
 742                 include_once(TR_INCLUDE_PATH.'classes/DAO/DAO.class.php');\r
 743                 $dao = new DAO();\r
 744                 \r
 745                 // All a4a resources have "&" converted to "&amp;". To match content with resources, \r
 746         // need the same conversion on content. \r
 747         $content = convertAmp($content);\r
 748         \r
 749         // keep &lt; (content saved in plain text format) as it is instead of &amp;lt;\r
 750         $content = str_replace('&amp;lt;', '&lt;', $content);\r
 751         \r
 752         $video_exts = array("mpg", "avi", "wmv", "mov", "swf", "mp4", "flv");\r
 753         \r
 754         $audio_exts = array("mp3", "wav", "ogg", "mid");\r
 755         $audio_width = 425;\r
 756         $audio_height = 27;\r
 757 \r
 758                 $txt_exts = array("txt", "html", "htm");\r
 759                 $image_exts = array("gif", "bmp", "png", "jpg", "jpeg", "png", "tif");\r
 760                 $only_on_secondary_type = intval($only_on_secondary_type);\r
 761                                 \r
 762                 // intialize the 4 returned values when $info_only is on\r
 763                 if ($info_only)\r
 764                 {\r
 765                         $has_text_alternative = false;\r
 766                         $has_audio_alternative = false;\r
 767                         $has_visual_alternative = false;\r
 768                         $has_sign_lang_alternative = false;\r
 769                 }\r
 770 \r
 771                 if (!$info_only && !$only_on_secondary_type && \r
 772                     ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_TEXT']==0) && \r
 773                     ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_AUDIO']==0) && \r
 774                     ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_VISUAL']==0)) \r
 775                 {\r
 776                         //No user's preferences related to content format are declared\r
 777                         if (!$info_only) {\r
 778                                 return $content;\r
 779                         } else {\r
 780                                 return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);\r
 781                         }\r
 782                 }\r
 783                 // get all relations between primary resources and their alternatives\r
 784         $sql = "SELECT DISTINCT c.content_path, pr.resource, ";\r
 785         \r
 786         // ignore primary resource type if the request is on particular secondary type.\r
 787         // otherwise, if the primary resource is defined with multiple primary types, \r
 788         // the primary resource would be replaced/appended multiple times.\r
 789         if ($only_on_secondary_type == 0) {\r
 790             $sql .= "prt.type_id primary_type, ";\r
 791         }\r
 792         $sql .= "sr.secondary_resource, srt.type_id secondary_type\r
 793                           FROM ".TABLE_PREFIX."primary_resources pr, ".\r
 794                                  TABLE_PREFIX."primary_resources_types prt,".\r
 795                                  TABLE_PREFIX."secondary_resources sr,".\r
 796                                  TABLE_PREFIX."secondary_resources_types srt,".\r
 797                                  TABLE_PREFIX."content c\r
 798                          WHERE pr.content_id=".$cid."\r
 799                                AND pr.primary_resource_id = prt.primary_resource_id\r
 800                                AND pr.primary_resource_id = sr.primary_resource_id\r
 801                                AND sr.language_code='".$_SESSION['lang']."'\r
 802                                AND sr.secondary_resource_id = srt.secondary_resource_id\r
 803                            AND pr.content_id = c.content_id";\r
 804                 if ($only_on_secondary_type > 0) {\r
 805                         $sql .= " AND srt.type_id=".$only_on_secondary_type;\r
 806                 }\r
 807                 $sql .= " ORDER BY pr.primary_resource_id, prt.type_id";\r
 808                 \r
 809                 $rows = $dao->execute($sql);\r
 810         \r
 811                 if (!is_array($rows)) {\r
 812                         if (!$info_only) {\r
 813                                 return $content;\r
 814                         } else {\r
 815                                 return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);\r
 816                         }\r
 817                 }\r
 818                 \r
 819                 foreach ($rows as $row) {\r
 820             $alternative_rows[] = $row;\r
 821             \r
 822             $youtube_playURL = ContentUtility::convertYoutubeWatchURLToPlayURL($row['resource']);\r
 823             \r
 824             if ($row['resource'] <> $youtube_playURL) {\r
 825                 $row['resource'] = $youtube_playURL;\r
 826                 $alternative_rows[] = $row;\r
 827             }\r
 828         }\r
 829 \r
 830         foreach ($alternative_rows as $row) \r
 831                 {\r
 832                         if ($info_only || $only_on_secondary_type ||\r
 833                             ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_TEXT']==1 && $row['primary_type']==3 &&\r
 834                             ($_SESSION['prefs']['PREF_ALT_TO_TEXT']=="audio" && $row['secondary_type']==1 || \r
 835                              $_SESSION['prefs']['PREF_ALT_TO_TEXT']=="visual" && $row['secondary_type']==4 || \r
 836                              $_SESSION['prefs']['PREF_ALT_TO_TEXT']=="sign_lang" && $row['secondary_type']==2)) ||\r
 837                              \r
 838                              ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_AUDIO']==1 && $row['primary_type']==1 &&\r
 839                              ($_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="visual" && $row['secondary_type']==4 || \r
 840                               $_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="text" && $row['secondary_type']==3 || \r
 841                               $_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="sign_lang" && $row['secondary_type']==2)) ||\r
 842                               \r
 843                              ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_VISUAL']==1 && $row['primary_type']==4 &&\r
 844                              ($_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="audio" && $row['secondary_type']==1 || \r
 845                               $_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="text" && $row['secondary_type']==3 || \r
 846                               $_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="sign_lang" && $row['secondary_type']==2))\r
 847                             )\r
 848                         {\r
 849                                 $ext = substr($row['secondary_resource'], strrpos($row['secondary_resource'], '.')+1);\r
 850                                 \r
 851                                 // alternative is video\r
 852                                 if (in_array($ext, $video_exts)|| in_array($ext, $audio_exts) || \r
 853                     preg_match("/http:\/\/.*youtube.com\/watch.*/", $row['secondary_resource'])) {\r
 854                     if (in_array($ext, $audio_exts)) {\r
 855                         // display audio medias in a smaller width/height (425 * 27)\r
 856                         // A hack for now to handle audio media player size\r
 857                         $target = '[media|'.$audio_width.'|'.$audio_height.']'.$row['secondary_resource'].'[/media]';\r
 858                     } else {\r
 859                         // use default media size for video medias\r
 860                         $target = '[media]'.$row['secondary_resource'].'[/media]';\r
 861                     }\r
 862                     $target = ContentUtility::embedFLV(ContentUtility::embedMedia($target));\r
 863                 }\r
 864                                 // a text primary to be replaced by a visual alternative \r
 865                                 else if (in_array($ext, $txt_exts))\r
 866                                 {\r
 867                                         if ($row['content_path'] <> '') \r
 868                                                 $file_location = $row['content_path'].'/'.$row['secondary_resource'];\r
 869                                         else \r
 870                                                 $file_location = $row['secondary_resource'];\r
 871                                         \r
 872                                         $file = TR_CONTENT_DIR.$_SESSION['course_id'] . '/'.$file_location;\r
 873                                         $target = '<br />'.file_get_contents($file);\r
 874                                         \r
 875                                         // check whether html file\r
 876                                         if (preg_match('/.*\<html.*\<\/html\>.*/s', $target))\r
 877                                         { // is a html file, use iframe to display\r
 878                                                 // get real path to the text file\r
 879                                                 if (defined('TR_FORCE_GET_FILE') && TR_FORCE_GET_FILE) {\r
 880                                                         $course_base_href = 'get.php/';\r
 881                                                 } else {\r
 882                                                         $course_base_href = 'content/' . $_SESSION['course_id'] . '/';\r
 883                                                 }\r
 884                 \r
 885                                                 $file = TR_BASE_HREF . $course_base_href.$file_location;\r
 886                                                         \r
 887                                                 $target = '<iframe width="100%" frameborder="0" class="autoHeight" scrolling="auto" src="'.$file.'"></iframe>';\r
 888                                         }\r
 889                                         else\r
 890                                         { // is a text file, insert/replace into content\r
 891                                                 $target = nl2br($target);\r
 892                                         }\r
 893                                 } \r
 894                                 else if (in_array($ext, $image_exts))\r
 895                                         $target = '<img border="0" alt="'._AT('alternate_text').'" src="'.$row['secondary_resource'].'"/>';\r
 896                                 // otherwise\r
 897                                 else\r
 898                                         $target = '<p><a href="'.$row['secondary_resource'].'">'.$row['secondary_resource'].'</a></p>';\r
 899         \r
 900                                 // replace or append the target alternative to the source\r
 901                                 if (($row['primary_type']==3 && $_SESSION['prefs']['PREF_ALT_TO_TEXT_APPEND_OR_REPLACE'] == 'replace') ||\r
 902                                         ($row['primary_type']==1 && $_SESSION['prefs']['PREF_ALT_TO_AUDIO_APPEND_OR_REPLACE']=='replace') ||\r
 903                                         ($row['primary_type']==4 && $_SESSION['prefs']['PREF_ALT_TO_VISUAL_APPEND_OR_REPLACE']=='replace'))\r
 904                                         $pattern_replace_to = '${1}'."\n".$target."\n".'${3}';\r
 905                 else\r
 906                     $pattern_replace_to = '${1}${2}'."<br /><br />\n".$target."\n".'${3}';\r
 907 \r
 908                 // *** Alternative replace/append starts from here ***\r
 909                 $processed = false;    // one primary resource is only processed once \r
 910                 \r
 911                 // append/replace target alternative to [media]source[/media]\r
 912                 if (!$processed && preg_match("/".preg_quote("[media").".*".preg_quote("]".$row['resource']."[/media]", "/")."/sU", $content))\r
 913                 {\r
 914                     $processed = true;\r
 915                                         if (!$info_only) {\r
 916                                                 $content = preg_replace("/(.*)(".preg_quote("[media").".*".preg_quote("]".$row['resource']."[/media]", "/").")(.*)/sU", \r
 917                                              $pattern_replace_to, $content);\r
 918                                         } else {\r
 919                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 920                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 921                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 922                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 923                                         }\r
 924                                 }\r
 925                                 \r
 926                                 // append/replace target alternative to <img ... src="source" ...></a>\r
 927                                 if (!$processed && preg_match("/\<img.*src=\"".preg_quote($row['resource'], "/")."\".*\/\>/sU", $content))\r
 928                 {\r
 929                     $processed = true;\r
 930                                         if (!$info_only) {\r
 931                                                 $content = preg_replace("/(.*)(\<img.*src=\"".preg_quote($row['resource'], "/")."\".*\/\>)(.*)/sU", \r
 932                                                         $pattern_replace_to, $content);\r
 933                                         } else {\r
 934                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 935                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 936                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 937                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 938                                         }\r
 939                                 }\r
 940                                 \r
 941                                 // append/replace target alternative to <object ... source ...></object>\r
 942                 if (!$processed && preg_match("/\<object.*".preg_quote($row['resource'], "/").".*\<\/object\>/sU", $content))\r
 943                 {\r
 944                     $processed = true;\r
 945                     if (!$info_only) {\r
 946                         $content = preg_replace("/(.*)(\<object.*".preg_quote($row['resource'], "/").".*\<\/object\>)(.*)/sU", \r
 947                                                         $pattern_replace_to, $content);\r
 948                                         } else {\r
 949                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 950                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 951                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 952                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 953                                         }\r
 954                                 }\r
 955         \r
 956                                 // append/replace target alternative to <a>...source...</a> or <a ...source...>...</a>\r
 957                 // skip this "if" when the source object has been processed in aboved <img> tag\r
 958                 if (!$processed && preg_match("/\<a.*".preg_quote($row['resource'], "/").".*\<\/a\>/sU", $content))\r
 959                 {\r
 960                     $processed = true;\r
 961                     if (!$info_only) {\r
 962                         $content = preg_replace("/(.*)(\<a.*".preg_quote($row['resource'], "/").".*\<\/a\>)(.*)/sU",\r
 963                                                         $pattern_replace_to, $content);\r
 964                                         } else {\r
 965                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 966                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 967                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 968                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 969                                         }\r
 970                                 }\r
 971         \r
 972                                 // append/replace target alternative to <embed ... source ...>\r
 973                                 if (!$processed && preg_match("/\<embed.*".preg_quote($row['resource'], "/").".*\>/sU", $content))\r
 974                 {\r
 975                     $processed = true;\r
 976                                         if (!$info_only) {\r
 977                                                 $content = preg_replace("/(.*)(\<embed.*".preg_quote($row['resource'], "/").".*\>)(.*)/sU", \r
 978                                                         $pattern_replace_to, $content);\r
 979                                         } else {\r
 980                                                 if ($row['secondary_type'] == 1) $has_audio_alternative = true;\r
 981                                                 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;\r
 982                                                 if ($row['secondary_type'] == 3) $has_text_alternative = true;\r
 983                                                 if ($row['secondary_type'] == 4) $has_visual_alternative = true;\r
 984                                         }\r
 985                                 }\r
 986                         }\r
 987                 }\r
 988                 \r
 989                 if (!$info_only) {\r
 990                         return $content;\r
 991                 } else {\r
 992                         return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);\r
 993                 }\r
 994         }       \r
 995                 \r
 996         /**\r
 997          * This function save the last content_id accessed by current user on a course into db and set $_SESSION['s_cid']\r
 998          * @access: public\r
 999          * @param: $content_id\r
1000          * @return: save $content_id, the last visited one of the current user, into db and session\r
1001          */\r
1002         public static function saveLastCid($content_id)\r
1003         {\r
1004                 global $_course_id;\r
1005                 \r
1006                 if (!$content_id || !isset($_SESSION['user_id'])) return;\r
1007                 \r
1008                 include_once(TR_INCLUDE_PATH.'classes/DAO/UserCoursesDAO.class.php');\r
1009                 \r
1010                 $userCoursesDAO = new UserCoursesDAO();\r
1011                 if ($userCoursesDAO->isExist($_SESSION['user_id'], $_course_id))\r
1012                 {\r
1013                         $userCoursesDAO->UpdateLastCid($_SESSION['user_id'], $_course_id, $content_id);\r
1014                         $_SESSION['s_cid'] = $content_id;\r
1015                 }\r
1016         }\r
1017 }\r
1018 ?>