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/home/classes/ContentUtility.class.php

https://github.com/harriswong/AContent
PHP | 1049 lines | 668 code | 148 blank | 233 comment | 200 complexity | a5e6b98228777b03a6c8d487fbad73b7 MD5 | raw file
Possible License(s): LGPL-2.0, LGPL-2.1, MPL-2.0-no-copyleft-exception, MIT, AGPL-1.0 
    

  1. <?php

    2. 

  2. /************************************************************************/

    3. 

  3. /* AContent                                                             */

    4. 

  4. /************************************************************************/

    5. 

  5. /* Copyright (c) 2010                                                   */

    6. 

  6. /* Inclusive Design Institute                                           */

    7. 

  7. /*                                                                      */

    8. 

  8. /* This program is free software. You can redistribute it and/or        */

    9. 

  9. /* modify it under the terms of the GNU General Public License          */

    10. 

  10. /* as published by the Free Software Foundation.                        */

    11. 

  11. /************************************************************************/

    12. 

  12. 

    13. 

  13. /**

    14. 

  14. * Content Utility functions 

    15. 

  15. * @access	public

    16. 

  16. * @author	Cindy Qi Li

    17. 

  17. */

    18. 

  18. 

    19. 

  19. if (!defined('TR_INCLUDE_PATH')) exit;

    20. 

  20. 

    21. 

  21. class ContentUtility {

    22. 

  22. 

    23. 

  23. 	/**

    24. 

  24. 	* This function cuts out html body

    25. 

  25. 	* @access  public

    26. 

  26. 	* @param   $text  html text

    27. 

  27. 	* @author  Cindy Qi Li

    28. 

  28. 	*/

    29. 

  29. 	public static function getHtmlBody($text) {

    30. 

  30. 		/* strip everything before <body> */

    31. 

  31. 		$start_pos	= strpos(strtolower($text), '<body');

    32. 

  32. 		if ($start_pos !== false) {

    33. 

  33. 			$start_pos	+= strlen('<body');

    34. 

  34. 			$end_pos	= strpos(strtolower($text), '>', $start_pos);

    35. 

  35. 			$end_pos	+= strlen('>');

    36. 

  36. 	

    37. 

  37. 			$text = substr($text, $end_pos);

    38. 

  38. 		}

    39. 

  39. 	

    40. 

  40. 		/* strip everything after </body> */

    41. 

  41. 		$end_pos	= strpos(strtolower($text), '</body>');

    42. 

  42. 		if ($end_pos !== false) {

    43. 

  43. 			$text = trim(substr($text, 0, $end_pos));

    44. 

  44. 		}

    45. 

  45. 	

    46. 

  46. 		return $text;

    47. 

  47. 	}

    48. 

  48. 

    49. 

  49. 	/**

    50. 

  50. 	* This function cuts out requested tag information from html head

    51. 

  51. 	* @access  public

    52. 

  52. 	* @param   $text  html text

    53. 

  53. 	* @param   $tags  a string or an array of requested tags

    54. 

  54. 	* @author  Cindy Qi Li

    55. 

  55. 	*/

    56. 

  56. 	public static function getHtmlHeadByTag($text, $tags)

    57. 

  57. 	{

    58. 

  58. 		$head = ContentUtility::getHtmlHead($text);

    59. 

  59. 		$rtn_text = "";

    60. 

  60. 		

    61. 

  61. 		if (!is_array($tags) && strlen(trim($tags)) > 0)

    62. 

  62. 		{

    63. 

  63. 			$tags = array(trim($tags));

    64. 

  64. 		}

    65. 

  65. 		foreach ($tags as $tag)

    66. 

  66. 		{

    67. 

  67. 			$tag = strtolower($tag);

    68. 

  68. 	

    69. 

  69. 			/* strip everything before <{tag}> */

    70. 

  70. 			$start_pos	= stripos($head, '<'.$tag);

    71. 

  71. 			$temp_head = $head;

    72. 

  72. 			

    73. 

  73. 			while ($start_pos !== false) 

    74. 

  74. 			{

    75. 

  75. 				$temp_text = substr($temp_head, $start_pos);

    76. 

  76. 		

    77. 

  77. 				/* strip everything after </{tag}> or />*/

    78. 

  78. 				$end_pos	= stripos($temp_text, '</' . $tag . '>');

    79. 

  79. 		

    80. 

  80. 				if ($end_pos !== false) 

    81. 

  81. 				{

    82. 

  82. 					$end_pos += strlen('</' . $tag . '>');

    83. 

  83. 					

    84. 

  84. 					// add an empty line after each tag information

    85. 

  85. 					$rtn_text .= trim(substr($temp_text, 0, $end_pos)) . '

    86. 

  86. 		

    87. 

  87. 	';

    88. 

  88. 				}

    89. 

  89. 				else  // match /> as ending tag if </tag> is not found

    90. 

  90. 				{

    91. 

  91. 					$end_pos	= stripos($temp_text, '/>');

    92. 

  92. 					

    93. 

  93. 					if($end_pos === false && stripos($temp_text, $tag.'>')===false){

    94. 

  94. 						//if /> is not found, then this is not a valid XHTML

    95. 

  95. 						//text iff it's not tag>

    96. 

  96. 						$end_pos = stripos($temp_text, '>');

    97. 

  97. 						$end_pos += strlen('>');

    98. 

  98. 					} else {

    99. 

  99. 						$end_pos += strlen('/>');

    100. 

  100. 					}

    101. 

  101. 					// add an empty line after each tag information

    102. 

  102. 					$rtn_text .= trim(substr($temp_text, 0, $end_pos)) . '

    103. 

  103. 		

    104. 

  104. 	';

    105. 

  105. 				}

    106. 

  106. 				

    107. 

  107. 				// initialize vars for next round of matching

    108. 

  108. 				$temp_head = substr($temp_text, $end_pos);

    109. 

  109. 				$start_pos = stripos($temp_head, '<'.$tag);

    110. 

  110. 			}

    111. 

  111. 		}

    112. 

  112. 		return $rtn_text;

    113. 

  113. 	}

    114. 

  114. 

    115. 

  115. 	/**

    116. 

  116. 	* This function cuts out html head

    117. 

  117. 	* @access  private

    118. 

  118. 	* @param   $text  html text

    119. 

  119. 	* @author  Cindy Qi Li

    120. 

  120. 	*/

    121. 

  121. 	private static function getHtmlHead ($text) {

    122. 

  122. 		/* strip everything before <head> */

    123. 

  123. 		$start_pos	= stripos($text, '<head');

    124. 

  124. 		if ($start_pos !== false) {

    125. 

  125. 			$start_pos	+= strlen('<head');

    126. 

  126. 			$end_pos	= stripos($text, '>', $start_pos);

    127. 

  127. 			$end_pos	+= strlen('>');

    128. 

  128. 	

    129. 

  129. 			$text = substr($text, $end_pos);

    130. 

  130. 		}

    131. 

  131. 	

    132. 

  132. 		/* strip everything after </head> */

    133. 

  133. 		$end_pos	= stripos($text, '</head');

    134. 

  134. 		if ($end_pos !== false) {

    135. 

  135. 			$text = trim(substr($text, 0, $end_pos));

    136. 

  136. 		}

    137. 

  137. 		return $text;

    138. 

  138. 	}

    139. 

  139. 

    140. 

  140. 	private static function embedFLV($text) {

    141. 

  141. 		global $content_base_href;

    142. 

  142. 		

    143. 

  143. 		$media_replace = array();

    144. 

  144. 		$media_matches = array();

    145. 

  145. 		$flowplayerholder_class = "atutor.flowplayerholder";  // style class used to play flowplayer medias

    146. 

  146. 		$flowplayerholder_def = '$f("*.'.$flowplayerholder_class.'"';   // javascript definition for atutor.flowplayerholder 

    147. 

  147. 		

    148. 

  148. 		// .flv

    149. 

  149. 		preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+)\.flv\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    150. 

  150. 		

    151. 

  151. 		if (isset($_SESSION['flash']) && $_SESSION['flash'] == "yes") {

    152. 

  152. 			$media_replace[] = "<div>\n".

    153. 

  153. 		                       "  <a class=\"".$flowplayerholder_class."\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"##MEDIA1##.flv\"></a>\n".

    154. 

  154. 		                       "</div>\n";

    155. 

  155. 		} else {

    156. 

  156. 			$media_replace[] = "<div>\n".

    157. 

  157. 		                       "  <a href=\"##MEDIA1##.flv\">##MEDIA1##.flv</a>\n".

    158. 

  158. 		                       "</div>\n";

    159. 

  159. 		}

    160. 

  160. 		

    161. 

  161. 		// .mp4

    162. 

  162. 		preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+)\.mp4\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    163. 

  163. 

    164. 

  164. 		if (isset($_SESSION['flash']) && $_SESSION['flash'] == "yes") {

    165. 

  165. 			$media_replace[] = "<div>\n".

    166. 

  166. 		                       "  <a class=\"".$flowplayerholder_class."\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"##MEDIA1##.mp4\"></a>\n".

    167. 

  167. 		                       "</div>\n";

    168. 

  168. 		} else {

    169. 

  169. 			$media_replace[] = "<div>\n".

    170. 

  170. 		                       "  <a href=\"##MEDIA1##.mp4\">##MEDIA1##.mp4</a>\n".

    171. 

  171. 		                       "</div>\n";

    172. 

  172. 		}

    173. 

  173. 		

    174. 

  174. 		// Executing the replace

    175. 

  175. 		for ($i=0;$i<count($media_replace);$i++){

    176. 

  176. 			foreach($media_matches[$i] as $media)

    177. 

  177. 			{

    178. 

  178. 				//find width and height for each matched media

    179. 

  179. 				if (preg_match("/\[media\|([0-9]*)\|([0-9]*)\]*/", $media[0], $matches)) 

    180. 

  180. 				{

    181. 

  181. 					$width = $matches[1];

    182. 

  182. 					$height = $matches[2];

    183. 

  183. 				}

    184. 

  184. 				else

    185. 

  185. 				{

    186. 

  186. 					$width = 425;

    187. 

  187. 					$height = 350;

    188. 

  188. 				}

    189. 

  189. 				

    190. 

  190. 				//replace media tags with embedded media for each media tag

    191. 

  191. 				$media_input = $media_replace[$i];

    192. 

  192. 				$media_input = str_replace("##WIDTH##","$width",$media_input);

    193. 

  193. 				$media_input = str_replace("##HEIGHT##","$height",$media_input);

    194. 

  194. 				$media_input = str_replace("##MEDIA1##","$media[1]",$media_input);

    195. 

  195. 				$media_input = str_replace("##MEDIA2##","$media[2]",$media_input);

    196. 

  196. 				$text = str_replace($media[0],$media_input,$text);

    197. 

  197. 			}

    198. 

  198. 		}

    199. 

  199. 		

    200. 

  200. 		// Include the javascript only if:

    201. 

  201. 		// 1. $flowplayerholder_class is used but not defined

    202. 

  202. 		// 2. exclude from export common cartridge or content package

    203. 

  203. 		if (strpos($text, $flowplayerholder_class) 

    204. 

  204. 		    && !strpos($text, $flowplayerholder_def)

    205. 

  205. 		    && !strpos($_SERVER['PHP_SELF'], "ims_export.php"))

    206. 

  206. 		{

    207. 

  207. 			$text .= '<script type="text/javascript">

    208. 

  208. '.$flowplayerholder_def.', "'.TR_BASE_HREF.'include/jscripts/flowplayer/flowplayer-3.2.4.swf", { 

    209. 

  209.   clip: { 

    210. 

  210.   autoPlay: false,

    211. 

  211.   baseUrl: \''.TR_BASE_HREF.'get.php/'.$content_base_href.'\'},

    212. 

  212.   plugins:  { 

    213. 

  213.     controls: { 

    214. 

  214.       buttons:true, 

    215. 

  215.       play: true,  

    216. 

  216.       scrubber: true, 

    217. 

  217.       autoHide:false

    218. 

  218.     }         

    219. 

  219.   }

    220. 

  220. });

    221. 

  221. </script>'."\n";

    222. 

  222. 		}

    223. 

  223. 		return $text;		

    224. 

  224. 	}

    225. 

  225. 	

    226. 

  226.     /*

    227. 

  227.      * This function converts the youtube playable url used in <object> tag (for instance: http://www.youtube.com/v/a0ryB0m0MiM)

    228. 

  228.      * to youtube url that is used to browse (for instance: http://www.youtube.com/watch?v=a0ryB0m0MiM)

    229. 

  229.      * @param: youtube playable URL. For instance, http://www.youtube.com/v/a0ryB0m0MiM

    230. 

  230.      * @return: if the param is a youtube playable url, return the according youtube URL used to browse. 

    231. 

  231.      *          For instance: http://www.youtube.com/watch?v=a0ryB0m0MiM

    232. 

  232.      *          Otherwise, return the original send-in parameter.

    233. 

  233.      */

    234. 

  234.     public function convertYoutubePlayURLToWatchURL($youtube_playURL) {

    235. 

  235.         return preg_replace("/(http:\/\/[a-z0-9\.]*)?youtube.com\/v\/(.*)/",

    236. 

  236.                             "\\1youtube.com/watch?v=\\2", $youtube_playURL);

    237. 

  237.     }

    238. 

  238. 

    239. 

  239.     /*

    240. 

  240.      * This function converts the youtube url that is used to browse (for instance: http://www.youtube.com/watch?v=a0ryB0m0MiM)

    241. 

  241.      * to youtube playable url used in <object> tag (for instance: http://www.youtube.com/v/a0ryB0m0MiM)

    242. 

  242.      * @param: the youtube URL used to browse. 

    243. 

  243.      *         For instance: http://www.youtube.com/watch?v=a0ryB0m0MiM

    244. 

  244.      * @return: if the param is a youtube url used to browse, return the according youtube playable URL. 

    245. 

  245.      *          For instance, http://www.youtube.com/v/a0ryB0m0MiM

    246. 

  246.      *          Otherwise, return the original send-in parameter.

    247. 

  247.      */

    248. 

  248.     public function convertYoutubeWatchURLToPlayURL($youtube_watchURL) {

    249. 

  249.         return preg_replace("/(http:\/\/[a-z0-9\.]*)?youtube.com\/watch\?v=(.*)/",

    250. 

  250.                             "\\1youtube.com/v/\\2", $youtube_watchURL);

    251. 

  251.     }

    252. 

  252. 

    253. 

  253. 	public static function embedMedia($text) {

    254. 

  254. 		if (preg_match("/\[media(\|[0-9]+\|[0-9]+)?\]*/", $text)==0){

    255. 

  255. 			return $text;

    256. 

  256. 		}

    257. 

  257. 	

    258. 

  258. 		// remove the spaces in [media] tag, otherwise, the next line converts URL inside [media] into <a> tag

    259. 

  259. 		$text = preg_replace("/(\[media\])([\s]*)(.*)(\[\/media\])/", '$1$3$4', $text);

    260. 

  260. 		$text = preg_replace("/(\[media\])(.*)([\s]*)(\[\/media\])/U", '$1$2$4', $text);

    261. 

  261. 		

    262. 

  262. 		$media_matches = array();

    263. 

  263. 		$media_replace = array();

    264. 

  264. 		

    265. 

  265. 		// First, we search though the text for all different kinds of media defined by media tags and store the results in $media_matches.

    266. 

  266. 		// Then the different replacements for the different media tags are stored in $media_replace.

    267. 

  267. 		// 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.

    268. 

  268. 	

    269. 

  269. 		// youtube videos

    270. 

  270. 		preg_match_all("#\[media[0-9a-z\|]*\]http://([a-z0-9\.]*)?youtube.com/watch\?v=(.*)\[/media\]#iU",$text,$media_matches[],PREG_SET_ORDER);

    271. 

  271. 		$media_replace[] = '<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>';

    272. 

  272. 		

    273. 

  273. 		// .mpg

    274. 

  274. 		preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mpg\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    275. 

  275. 		$media_replace[] = "<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>";

    276. 

  276. 		

    277. 

  277. 		// .avi

    278. 

  278. 		preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).avi\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    279. 

  279. 		$media_replace[] = "<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>";

    280. 

  280. 		

    281. 

  281. 		// .wmv

    282. 

  282. 		preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).wmv\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    283. 

  283. 		$media_replace[] = "<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>";

    284. 

  284. 		

    285. 

  285. 		// .mov

    286. 

  286. 		preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mov\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    287. 

  287. 		$media_replace[] = "<object classid=\"clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B\" codebase=\"http://www.apple.com/qtactivex/qtplugin.cab\" width=\"##WIDTH##\" height=\"##HEIGHT##\">\n".

    288. 

  288. 		                   "  <param name=\"src\" value=\"##MEDIA1##.mov\">\n".

    289. 

  289. 		                   "  <param name=\"controller\" value=\"true\">\n".

    290. 

  290. 		                   "  <param name=\"autoplay\" value=\"false\">\n".

    291. 

  291. 		                   "  <!--[if gte IE 7] > <!-->\n".

    292. 

  292. 		                   "  <object type=\"video/quicktime\" data=\"##MEDIA1##.mov\" width=\"##WIDTH##\" height=\"##HEIGHT##\">\n".

    293. 

  293. 		                   "    <param name=\"controller\" value=\"true\">\n".

    294. 

  294. 		                   "    <param name=\"autoplay\" value=\"false\">\n".

    295. 

  295. 		                   "    <a href=\"##MEDIA1##.mov\">##MEDIA1##.mov</a>\n".

    296. 

  296. 		                   "  </object>\n".

    297. 

  297. 		                   "  <!--<![endif]-->\n".

    298. 

  298. 		                   "  <!--[if lt IE 7]>\n".

    299. 

  299. 		                   "  <a href=\"##MEDIA1##.mov\">##MEDIA1##.mov</a>\n".

    300. 

  300. 		                   "  <![endif]-->\n".

    301. 

  301. 		                   "</object>";

    302. 

  302. 		

    303. 

  303. 		// .swf

    304. 

  304. 		preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).swf\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    305. 

  305. 		$media_replace[] = "<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>";

    306. 

  306. 	

    307. 

  307. 		// .mp3

    308. 

  308. 		preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mp3\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    309. 

  309. 		$media_replace[] = "<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>";

    310. 

  310. 		

    311. 

  311. 		// .wav

    312. 

  312. 		preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).wav\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    313. 

  313. 		$media_replace[] ="<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>";

    314. 

  314. 		

    315. 

  315. 		// .ogg

    316. 

  316. 		preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).ogg\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    317. 

  317. 		$media_replace[] ="<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>";

    318. 

  318. 		

    319. 

  319. 		// .ogm

    320. 

  320. 		preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).ogm\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    321. 

  321. 		$media_replace[] ="<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>";

    322. 

  322. 		

    323. 

  323. 		// .mid

    324. 

  324. 		preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).mid\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);

    325. 

  325. 		$media_replace[] ="<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>";

    326. 

  326. 		

    327. 

  327. 		$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);

    328. 

  328. 	

    329. 

  329. 		// Executing the replace

    330. 

  330. 		for ($i=0;$i<count($media_replace);$i++){

    331. 

  331. 			foreach($media_matches[$i] as $media)

    332. 

  332. 			{

    333. 

  333. 				

    334. 

  334. 				//find width and height for each matched media

    335. 

  335. 				if (preg_match("/\[media\|([0-9]*)\|([0-9]*)\]*/", $media[0], $matches)) 

    336. 

  336. 				{

    337. 

  337. 					$width = $matches[1];

    338. 

  338. 					$height = $matches[2];

    339. 

  339. 				}

    340. 

  340. 				else

    341. 

  341. 				{

    342. 

  342. 					$width = 425;

    343. 

  343. 					$height = 350;

    344. 

  344. 				}

    345. 

  345. 				

    346. 

  346. 				//replace media tags with embedded media for each media tag

    347. 

  347. 				$media_input = $media_replace[$i];

    348. 

  348. 				$media_input = str_replace("##WIDTH##","$width",$media_input);

    349. 

  349. 				$media_input = str_replace("##HEIGHT##","$height",$media_input);

    350. 

  350. 				$media_input = str_replace("##MEDIA1##","$media[1]",$media_input);

    351. 

  351. 				$media_input = str_replace("##MEDIA2##","$media[2]",$media_input);

    352. 

  352. 				$text = str_replace($media[0],$media_input,$text);

    353. 

  353. 			}

    354. 

  354. 		}

    355. 

  355. 		

    356. 

  356. 		return $text;

    357. 

  357. 	}

    358. 

  358. 

    359. 

  359. 	public static function makeClickable($text) {

    360. 

  360. 		$text = ContentUtility::embedMedia($text);

    361. 

  361. 	

    362. 

  362. 		// convert plain text URL to clickable URL.

    363. 

  363. 		// Limited conversion: It doesn't cover the case when the stuff in front of the URL is not a word. For example:

    364. 

  364. 		// <p>http://google.ca</p>

    365. 

  365. 		// "http://google.ca" 

    366. 

  366. 		$text = preg_replace('/(^|[\n ])([\w]*?)((?<!(\[media\]))http(s)?:\/\/[\w]+[^ \,\"\n\r\t\)<]*)/is', 

    367. 

  367. 		                     '$1$2<a href="$3">$3</a>', $text);

    368. 

  368. 		

    369. 

  369. 		// convert email address to clickable URL that pops up "send email" interface with the address filled in

    370. 

  370. 		$text = preg_replace('/(?|<a href="mailto[\s]*:[\s]*([_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'\@'

    371. 

  371. 	                            .'[_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'(\.[a-zA-Z]{1,6})+)">(.*)<\/a>'

    372. 

  372. 	                            .'|((((([_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'\@'

    373. 

  373. 	                            .'[_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'(\.[a-zA-Z]{1,6})+))))))/i',

    374. 

  374. 							"<a href=\"mailto:\\1\">\\5</a>",

    375. 

  375. 							$text);

    376. 

  376. 		

    377. 

  377. 		// flv conversion needs to come after url conversion (2 lines above) otherwise the url to flowplayer swf file

    378. 

  378. 		// in the script for a.flowplayerholder is converted

    379. 

  379. 		$text = ContentUtility::embedFLV($text);

    380. 

  380. 		

    381. 

  381. 		return $text;

    382. 

  382. 	}

    383. 

  383. 

    384. 

  384. 	public static function myCodes($text, $html = false) {

    385. 

  385. 		global $_base_path;

    386. 

  386. 		global $HTTP_USER_AGENT;

    387. 

  387. 	

    388. 

  388. 		if (substr($HTTP_USER_AGENT,0,11) == 'Mozilla/4.7') {

    389. 

  389. 			$text = str_replace('[quote]','</p><p class="block">',$text);

    390. 

  390. 			$text = str_replace('[/quote]','</p><p>',$text);

    391. 

  391. 	

    392. 

  392. 			$text = str_replace('[reply]','</p><p class="block">',$text);

    393. 

  393. 			$text = str_replace('[/reply]','</p><p>',$text);

    394. 

  394. 		} else {

    395. 

  395. 			$text = str_replace('[quote]','<blockquote>',$text);

    396. 

  396. 			$text = str_replace('[/quote]','</blockquote><p>',$text);

    397. 

  397. 	

    398. 

  398. 			$text = str_replace('[reply]','</p><blockquote class="block"><p>',$text);

    399. 

  399. 			$text = str_replace('[/reply]','</p></blockquote><p>',$text);

    400. 

  400. 		}

    401. 

  401. 	

    402. 

  402. 		$text = str_replace('[b]','<strong>',$text);

    403. 

  403. 		$text = str_replace('[/b]','</strong>',$text);

    404. 

  404. 	

    405. 

  405. 		$text = str_replace('[i]','<em>',$text);

    406. 

  406. 		$text = str_replace('[/i]','</em>',$text);

    407. 

  407. 	

    408. 

  408. 		$text = str_replace('[u]','<u>',$text);

    409. 

  409. 		$text = str_replace('[/u]','</u>',$text);

    410. 

  410. 	

    411. 

  411. 		$text = str_replace('[center]','<center>',$text);

    412. 

  412. 		$text = str_replace('[/center]','</center><p>',$text);

    413. 

  413. 	

    414. 

  414. 		/* colours */

    415. 

  415. 		$text = str_replace('[blue]','<span style="color: blue;">',$text);

    416. 

  416. 		$text = str_replace('[/blue]','</span>',$text);

    417. 

  417. 	

    418. 

  418. 		$text = str_replace('[orange]','<span style="color: orange;">',$text);

    419. 

  419. 		$text = str_replace('[/orange]','</span>',$text);

    420. 

  420. 	

    421. 

  421. 		$text = str_replace('[red]','<span style="color: red;">',$text);

    422. 

  422. 		$text = str_replace('[/red]','</span>',$text);

    423. 

  423. 	

    424. 

  424. 		$text = str_replace('[purple]','<span style="color: purple;">',$text);

    425. 

  425. 		$text = str_replace('[/purple]','</span>',$text);

    426. 

  426. 	

    427. 

  427. 		$text = str_replace('[green]','<span style="color: green;">',$text);

    428. 

  428. 		$text = str_replace('[/green]','</span>',$text);

    429. 

  429. 	

    430. 

  430. 		$text = str_replace('[gray]','<span style="color: gray;">',$text);

    431. 

  431. 		$text = str_replace('[/gray]','</span>',$text);

    432. 

  432. 	

    433. 

  433. 		$text = str_replace('[op]','<span class="bigspacer"></span> <a href="',$text);

    434. 

  434. 		$text = str_replace('[/op]','">'._AT('view_entire_post').'</a>',$text);

    435. 

  435. 	

    436. 

  436. 		$text = str_replace('[head1]','<h2>',$text);

    437. 

  437. 		$text = str_replace('[/head1]','</h2>',$text);

    438. 

  438. 	

    439. 

  439. 		$text = str_replace('[head2]','<h3>',$text);

    440. 

  440. 		$text = str_replace('[/head2]','</h3>',$text);

    441. 

  441. 	

    442. 

  442. 		$text = str_replace('[cid]',$_base_path.'content.php?_cid='.$_SESSION['s_cid'],$text);

    443. 

  443. 	

    444. 

  444. 		global $sequence_links, $_course_id, $_content_id;

    445. 

  445. 		if ($_course_id > 0 && !isset($sequence_links) && $_content_id > 0) {

    446. 

  446. 			global $contentManager;

    447. 

  447. 			$sequence_links = $contentManager->generateSequenceCrumbs($_content_id);

    448. 

  448. 		}

    449. 

  449. 		if (isset($sequence_links['previous']) && $sequence_links['previous']['url']) {

    450. 

  450. 			$text = str_replace('[pid]', $sequence_links['previous']['url'], $text);

    451. 

  451. 		}

    452. 

  452. 		if (isset($sequence_links['next']) && $sequence_links['next']['url']) {

    453. 

  453. 			$text = str_replace('[nid]', $sequence_links['next']['url'], $text);

    454. 

  454. 		}

    455. 

  455. 		if (isset($sequence_links['resume']) && $sequence_links['resume']['url']) {

    456. 

  456. 			$text = str_replace('[nid]', $sequence_links['resume']['url'], $text);

    457. 

  457. 		}

    458. 

  458. 		if (isset($sequence_links['first']) && $sequence_links['first']['url']) {

    459. 

  459. 			$text = str_replace('[fid]', $sequence_links['first']['url'], $text);

    460. 

  460. 		}

    461. 

  461. 	

    462. 

  462. 		/* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */

    463. 

  463. 	    $html = !$html ? 0 : 1;

    464. 

  464. 	    

    465. 

  465. 		// little hack added by greg to add syntax highlighting without using <?php \?\>

    466. 

  466. 		

    467. 

  467. 		$text = str_replace("[code]","[code]<?php",$text);

    468. 

  468. 		$text = str_replace("[/code]","?>[/code]",$text);

    469. 

  469. 	

    470. 

  470. 		$text = preg_replace("/\[code\]\s*(.*)\s*\[\\/code\]/Usei", "ContentUtility::highlightCode(ContentUtility::fixQuotes('\\1'), $html)", $text);

    471. 

  471. 		// now remove the <?php added above and leave the syntax colour behind.

    472. 

  472. 		$text = str_replace("&lt;?php", "", $text);

    473. 

  473. 		$text = str_replace("?&gt;", "", $text);

    474. 

  474. 	

    475. 

  475. 		return $text;

    476. 

  476. 	}

    477. 

  477. 

    478. 

  478. 	/* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */

    479. 

  479. 	private static function highlightCode($code, $html) {

    480. 

  480. 		// XHTMLize PHP highlight_string output until it gets fixed in PHP

    481. 

  481. 		static $search = array(

    482. 

  482. 			'<br>',

    483. 

  483. 			'<font',

    484. 

  484. 			'</font>',

    485. 

  485. 			'color="');

    486. 

  486. 	

    487. 

  487. 		static $replace = array(

    488. 

  488. 			'<br />',

    489. 

  489. 			'<span',

    490. 

  490. 			'</span>',

    491. 

  491. 			'style="color:');

    492. 

  492. 		if (!$html) {

    493. 

  493. 			$code = str_replace('&lt;', '<', $code);

    494. 

  494. 			$code = str_replace("\r", '', $code);

    495. 

  495. 		}

    496. 

  496. 	

    497. 

  497. 		return str_replace($search, $replace, highlight_string($code, true));

    498. 

  498. 	}

    499. 

  499. 	

    500. 

  500. 	/* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */

    501. 

  501. 	private static function fixQuotes($text){

    502. 

  502. 		return str_replace('\\"', '"', $text);

    503. 

  503. 	}

    504. 

  504. 

    505. 

  505. 	public static function imageReplace($text) {

    506. 

  506. 		/* image urls do not require http:// */

    507. 

  507. 		

    508. 

  508. 	//	$text = eregi_replace("\[image(\|)?([[:alnum:][:space:]]*)\]" .

    509. 

  509. 	//						 "[:space:]*" .

    510. 

  510. 	//						 "([[:alnum:]#?/&=:\"'_.-]+)" .

    511. 

  511. 	//						 "[:space:]*" .

    512. 

  512. 	//						 "((\[/image\])|(.*\[/image\]))",

    513. 

  513. 	//				  "<img src=\"\\3\" alt=\"\\2\" />",

    514. 

  514. 	//				  $text);

    515. 

  515. 		 

    516. 

  516. 		$text = preg_replace("/\[image(\|)?([a-zA-Z0-9\s]*)\]".

    517. 

  517. 		                     "[\s]*".

    518. 

  518. 		                     "([a-zA-Z0-9\#\?\/\&\=\:\\\"\'\_\.\-]+)[\s]*".

    519. 

  519. 		                     "((\[\/image\])|(.*\[\/image\]))/i",

    520. 

  520. 					  "<img src=\"\\3\" alt=\"\\2\" />",

    521. 

  521. 					  $text);

    522. 

  522. 					  

    523. 

  523. 		return $text;

    524. 

  524. 	}

    525. 

  525. 	

    526. 

  526. 	private static function formatFinalOutput($text, $nl2br = true) {

    527. 

  527. 		global $_base_path;

    528. 

  528. 	

    529. 

  529. 		$text = str_replace('CONTENT_DIR/', '', $text);

    530. 

  530. 		if ($nl2br) {

    531. 

  531. 			return nl2br(ContentUtility::imageReplace(ContentUtility::makeClickable(ContentUtility::myCodes(' '.$text, false))));

    532. 

  532. 		}

    533. 

  533. 	

    534. 

  534. 		return ContentUtility::imageReplace(ContentUtility::makeClickable(ContentUtility::myCodes(' '.$text, true)));

    535. 

  535. 	}

    536. 

  536. 

    537. 

  537. 	/**

    538. 

  538. 	* This function converts the input string into AContent html content string 

    539. 

  539. 	* @access  public

    540. 

  540. 	* @param   $input: input string

    541. 

  541. 	*          $html: whether the input is in html

    542. 

  542. 	* @return  converted AContent html content string

    543. 

  543. 	* @author  Cindy Qi Li

    544. 

  544. 	*/

    545. 

  545. 	public static function formatContent($input, $html = 0) {

    546. 

  546. 		global $_base_path, $_config;

    547. 

  547. 	

    548. 

  548. 		if (!$html) {

    549. 

  549. 			$input = str_replace('<', '&lt;', $input);

    550. 

  550. 			$input = str_replace('&lt;?php', '<?php', $input); // for bug #2087

    551. 

  551. 		} elseif ($html==2) {

    552. 

  552. 			$output = '<iframe width="100%" frameborder="0" id="content_frame" marginheight="0" marginwidth="0" src="'.$input.'"></iframe>';

    553. 

  553. 			$output .=	'<script type="text/javascript">

    554. 

  554. 						function resizeIframe() {

    555. 

  555. 							var height = document.documentElement.clientHeight;

    556. 

  556. 							

    557. 

  557. 							// not sure how to get this dynamically

    558. 

  558. 							height -= 20; /* whatever you set your body bottom margin/padding to be */

    559. 

  559. 							

    560. 

  560. 							document.getElementById(\'content_frame\').style.height = height +"px";

    561. 

  561. 							

    562. 

  562. 						};

    563. 

  563. 						document.getElementById(\'content_frame\').onload = resizeIframe;

    564. 

  564. 						window.onresize = resizeIframe;

    565. 

  565. 						</script>';

    566. 

  566. 			return $output;

    567. 

  567. 		}

    568. 

  568. 	

    569. 

  569. 		/* Commented by Cindy Qi Li on Jan 12, 2010

    570. 

  570. 		 * AContent does not support glossary

    571. 

  571. 		// do the glossary search and replace:

    572. 

  572. 		if (is_array($glossary)) {

    573. 

  573. 			foreach ($glossary as $k => $v) {

    574. 

  574. 				$k = urldecode($k);

    575. 

  575. 				$v = str_replace("\n", '<br />', $v);

    576. 

  576. 				$v = str_replace("\r", '', $v);

    577. 

  577. 	

    578. 

  578. 				// escape special characters

    579. 

  579. 				$k = preg_quote($k);

    580. 

  580. 	

    581. 

  581. 				$k = str_replace('&lt;', '<', $k);

    582. 

  582. 				$k = str_replace('/', '\/', $k);

    583. 

  583. 	

    584. 

  584. 				$original_term = $k;

    585. 

  585. 				$term = $original_term;

    586. 

  586. 	

    587. 

  587. 		 		$term = '(\s*'.$term.'\s*)';

    588. 

  588. 				$term = str_replace(' ','((<br \/>)*\s*)', $term); 

    589. 

  589. 	

    590. 

  590. 				$def = htmlspecialchars($v, ENT_QUOTES, 'UTF-8');		

    591. 

  591. 				if ($simple) {

    592. 

  592. 					$input = preg_replace

    593. 

  593. 							("/(\[\?\])$term(\[\/\?\])/i",

    594. 

  594. 							'<a href="'.$simple.'glossary.html#'.urlencode($original_term).'" target="body" class="at-term">\\2</a>',

    595. 

  595. 							$input);

    596. 

  596. 				} else {

    597. 

  597. 					$input = preg_replace

    598. 

  598. 						("/(\[\?\])$term(\[\/\?\])/i",

    599. 

  599. 						'\\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);

    600. 

  600. 				}

    601. 

  601. 			}

    602. 

  602. 		} else if (!$user_glossary) {

    603. 

  603. 			$input = str_replace(array('[?]','[/?]'), '', $input);

    604. 

  604. 		}

    605. 

  605. 		*/

    606. 

  606. 

    607. 

  607. 		

    608. 

  608. 		$input = str_replace('CONTENT_DIR', '', $input);

    609. 

  609. 	

    610. 

  610. 		if (isset($_config['latex_server']) && $_config['latex_server']) {

    611. 

  611. 			// see: http://www.forkosh.com/mimetex.html

    612. 

  612. 			$input = preg_replace('/\[tex\](.*?)\[\/tex\]/sie', "'<img src=\"'.\$_config['latex_server'].rawurlencode('$1').'\" align=\"middle\">'", $input);

    613. 

  613. 		}

    614. 

  614. 	

    615. 

  615. 		if ($html) {

    616. 

  616. 			$x = ContentUtility::formatFinalOutput($input, false);

    617. 

  617. 			return $x;

    618. 

  618. 		}

    619. 

  619. 	

    620. 

  620.         // the following has been taken out for this: 

    621. 

  621.         // http://atutor.ca/atutor/mantis/view.php?id=4593

    622. 

  622.         // @date Oct 18, 2010

    623. 

  623.         //	$output = ContentUtility::formatFinalOutput($input);

    624. 

  624.         $output = $input;

    625. 

  625. 		$output = '<p>'.$input.'</p>';

    626. 

  626.         

    627. 

  627. 		return $output;

    628. 

  628. 	}

    629. 

  629. 	

    630. 

  630. 	/**

    631. 

  631. 	 * This function returns html string of "table of content"

    632. 

  632. 	 * @access: public

    633. 

  633. 	 * @param: $content: a string

    634. 

  634. 	 * @return: a html string of "table of content"

    635. 

  635. 	 */

    636. 

  636. 	public static function getContentTable($content)

    637. 

  637. 	{

    638. 

  638. 		preg_match_all("/<(h[\d]+)[^>]*>(.*)<\/(\s*)\\1(\s*)>/i", $content, $found_headers, PREG_SET_ORDER);

    639. 

  639. 		

    640. 

  640. 		if (count($found_headers) == 0) return array("", $content);

    641. 

  641. 		else

    642. 

  642. 		{

    643. 

  643. 			$num_of_headers = 0;

    644. 

  644. 	

    645. 

  645. 			for ($i = 0; $i < count($found_headers); $i++)

    646. 

  646. 			{

    647. 

  647. 				$div_id = "_header_" . $num_of_headers++;

    648. 

  648. 				

    649. 

  649. 				if ($i == 0)

    650. 

  650. 				{

    651. 

  651. 					$content_table = "<div id=\"toc\">\n<fieldset id=\"toc\"><legend>". _AT("table_of_contents")."</legend>\n";

    652. 

  652. 				}

    653. 

  653. 	

    654. 

  654. 				$content = str_replace($found_headers[$i][0], '<div id="'.$div_id.'">'.$found_headers[$i][0].'</div>', $content);

    655. 

  655. 				$content_table .= '<a href="'.$_SERVER["REQUEST_URI"].'#'.$div_id.'" class="'.$found_headers[$i][1].'">'. $found_headers[$i][2]."</a>\n";

    656. 

  656. 	

    657. 

  657. 				if ($i == count($found_headers) - 1)

    658. 

  658. 				{

    659. 

  659. 					$content_table .= "</fieldset></div><br />";

    660. 

  660. 				}

    661. 

  661. 			}

    662. 

  662. 			return array($content_table, $content);

    663. 

  663. 		}

    664. 

  664. 	}

    665. 

  665. 	

    666. 

  666. 	/**

    667. 

  667. 	 * This function returns an array of content tools' shortcuts

    668. 

  668. 	 * @access: public

    669. 

  669. 	 * @param: $content_row: an array of the current content information

    670. 

  670. 	 * @return: an array of all the tool short cuts that apply to the current content or content folder

    671. 

  671. 	 */

    672. 

  672. 	public static function getToolShortcuts($content_row)

    673. 

  673. 	{

    674. 

  674. 		global $_current_user, $_base_href, $contentManager, $_course_id;

    675. 

  675. 		

    676. 

  676. 		if (((!$content_row['content_parent_id'] && ($_SESSION['packaging'] == 'top'))

    677. 

  677. 		      || ($_SESSION['packaging'] == 'all'))

    678. 

  678. 			  || (isset($_current_user) && $_current_user->isAuthor($_course_id))) {

    679. 

  679. 		

    680. 

  680. 			$tool_shortcuts[] = array(

    681. 

  681. 				  'title' => _AT('export_content_in_cp'), 

    682. 

  682. 				  'url' => $_base_href . 'home/ims/ims_export.php?_cid='.$content_row['content_id'],

    683. 

  683. 				  'icon' => $_base_href . 'themes/'.$_SESSION['prefs']['PREF_THEME'].'/images/export.png');

    684. 

  684. 			$tool_shortcuts[] = array(

    685. 

  685. 				  'title' => _AT('export_content_in_cc'), 

    686. 

  686. 				  'url' => $_base_href . 'home/imscc/ims_export.php?_cid='.$content_row['content_id'].SEP.'to_a4a=1',

    687. 

  687. 				  'icon' => $_base_href . 'themes/'.$_SESSION['prefs']['PREF_THEME'].'/images/export_cc.png');

    688. 

  688. 		}

    689. 

  689. 		

    690. 

  690. 		if (isset($_current_user) && $_current_user->isAuthor($_course_id)) {

    691. 

  691. 			if ($content_row['content_type'] == CONTENT_TYPE_CONTENT || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {

    692. 

  692. 				$tool_shortcuts[] = array(

    693. 

  693. 					  'title' => _AT('edit_this_page'),   

    694. 

  694. 					   'url' => $_base_href . 'home/editor/edit_content.php?_cid='.$content_row['content_id'],

    695. 

  695. 					  'icon' => $_base_href . 'images/medit.gif');

    696. 

  696. 			}

    697. 

  697. 		

    698. 

  698. 			$tool_shortcuts[] = array(

    699. 

  699. 			  'title' => _AT('add_sibling_folder'), 

    700. 

  700. 			  'url' => $_base_href .

    701. 

  701. 				'home/editor/edit_content_folder.php?pid='.$contentManager->_menu_info[$content_row['content_id']]['content_parent_id'].SEP.'_course_id='.$_course_id,

    702. 

  702. 			   'icon' => $_base_href . 'images/add_sibling_folder.gif');

    703. 

  703. 

    704. 

  704. 			if ($content_row['content_type'] == CONTENT_TYPE_FOLDER || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {

    705. 

  705. 				$tool_shortcuts[] = array(

    706. 

  706. 				  'title' => _AT('add_sub_folder'), 

    707. 

  707. 				  'url' => $_base_href .

    708. 

  708. 					'home/editor/edit_content_folder.php?_course_id='.$_course_id.SEP.'pid='.$content_row['content_id'],

    709. 

  709. 				   'icon' => $_base_href . 'images/add_sub_folder.gif');

    710. 

  710. 			}

    711. 

  711. 			

    712. 

  712. 			$tool_shortcuts[] = array(

    713. 

  713. 			  'title' => _AT('add_sibling_page'), 

    714. 

  714. 			  'url' => $_base_href .

    715. 

  715. 				'home/editor/edit_content.php?pid='.$contentManager->_menu_info[$content_row['content_id']]['content_parent_id'].SEP.'_course_id='.$_course_id,

    716. 

  716. 			  'icon' => $_base_href . 'images/add_sibling_page.gif');

    717. 

  717. 			

    718. 

  718. 			if ($content_row['content_type'] == CONTENT_TYPE_CONTENT || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {

    719. 

  719. 				$tool_shortcuts[] = array(

    720. 

  720. 				  'title' => _AT('delete_this_page'), 	

    721. 

  721. 				  'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$content_row['content_id'],

    722. 

  722. 				  'icon' => $_base_href . 'images/page_delete.gif');

    723. 

  723. 			}

    724. 

  724. 			else if ($content_row['content_type'] == CONTENT_TYPE_FOLDER) {

    725. 

  725. 				$tool_shortcuts[] = array(

    726. 

  726. 				  'title' => _AT('add_sub_page'), 	

    727. 

  727. 				  'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$content_row['content_id'],

    728. 

  728. 				  'icon' => $_base_href . 'images/add_sub_page.gif');

    729. 

  729. 				

    730. 

  730. 				$tool_shortcuts[] = array(

    731. 

  731. 				  'title' => _AT('delete_this_folder'), 	

    732. 

  732. 				  'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$content_row['content_id'],

    733. 

  733. 				  'icon' => $_base_href . 'images/page_delete.gif');

    734. 

  734. 			}

    735. 

  735. 		}

    736. 

  736. 		return $tool_shortcuts;

    737. 

  737. 

    738. 

  738. //	if (isset($_current_user) && $_current_user->isAuthor($_course_id)) {

    739. 

  739. //		$shortcuts[] = array('title' => _AT('add_sub_folder'),   'url' => $_base_href . 'home/editor/edit_content_folder.php?_course_id='.$_course_id.'pid='.$cid);

    740. 

  740. //		

    741. 

  741. ////		$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');

    742. 

  742. //		if ($contentManager->_menu_info[$cid]['content_parent_id']) {

    743. 

  743. //			$shortcuts[] = array('title' => _AT('add_sibling_page'), 'url' => $_base_href .

    744. 

  744. //				'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');

    745. 

  745. //		}

    746. 

  746. //	

    747. 

  747. //		$shortcuts[] = array('title' => _AT('add_sub_page'),     'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$cid);

    748. 

  748. //		$shortcuts[] = array('title' => _AT('delete_this_folder'), 'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$cid, 'icon' => $_base_href . 'images/page_delete.gif');

    749. 

  749. //	}

    750. 

  750. 	}

    751. 

  751. 	

    752. 

  752. 	/**

    753. 

  753. 	* replace source object with alternatives according to user's preferences

    754. 

  754. 	* @access	public

    755. 

  755. 	* @param	$cid: 				content id.

    756. 

  756. 	* @param	$content:	 		the original content page ($content_row['text'], from content.php).

    757. 

  757. 	* @param    $info_only:         when "true", return the array of info (has_text_alternative, has_audio_alternative, has_visual_alternative, has_sign_lang_alternative)

    758. 

  758. 	* @param    $only_on_secondary_type: 

    759. 

  759. 	* @return	string				$content: the content page with the appropriated resources.

    760. 

  760. 	* @see		$db			        from include/vitals.inc.php

    761. 

  761. 	* @author	Cindy Qi Li

    762. 

  762. 	*/

    763. 

  763. 	public static function applyAlternatives($cid, $content, $info_only = false, $only_on_secondary_type = 0){

    764. 

  764. 		global $db, $_course_id;

    765. 

  765. 		

    766. 

  766. 		include_once(TR_INCLUDE_PATH.'classes/DAO/DAO.class.php');

    767. 

  767. 		$dao = new DAO();

    768. 

  768. 		

    769. 

  769.         $video_exts = array("mpg", "avi", "wmv", "mov", "swf", "mp4", "flv");

    770. 

  770.         

    771. 

  771.         $audio_exts = array("mp3", "wav", "ogg", "mid");

    772. 

  772.         $audio_width = 425;

    773. 

  773.         $audio_height = 27;

    774. 

  774. 

    775. 

  775. 		$txt_exts = array("txt", "html", "htm");

    776. 

  776. 		$image_exts = array("gif", "bmp", "png", "jpg", "jpeg", "png", "tif");

    777. 

  777. 		$only_on_secondary_type = intval($only_on_secondary_type);

    778. 

  778. 				

    779. 

  779. 		// intialize the 4 returned values when $info_only is on

    780. 

  780. 		if ($info_only)

    781. 

  781. 		{

    782. 

  782. 			$has_text_alternative = false;

    783. 

  783. 			$has_audio_alternative = false;

    784. 

  784. 			$has_visual_alternative = false;

    785. 

  785. 			$has_sign_lang_alternative = false;

    786. 

  786. 		}

    787. 

  787. 

    788. 

  788. 		if (!$info_only && !$only_on_secondary_type && 

    789. 

  789. 		    ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_TEXT']==0) && 

    790. 

  790. 		    ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_AUDIO']==0) && 

    791. 

  791. 		    ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_VISUAL']==0)) 

    792. 

  792. 		{

    793. 

  793. 			//No user's preferences related to content format are declared

    794. 

  794. 			if (!$info_only) {

    795. 

  795. 				return $content;

    796. 

  796. 			} else {

    797. 

  797. 				return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);

    798. 

  798. 			}

    799. 

  799. 		}

    800. 

  800.         

    801. 

  801. 		// get all relations between primary resources and their alternatives

    802. 

  802.         $sql = "SELECT DISTINCT c.content_path, pr.resource,  prt.type_id primary_type,

    803. 

  803.                        sr.secondary_resource, srt.type_id secondary_type

    804. 

  804. 		          FROM ".TABLE_PREFIX."primary_resources pr, ".

    805. 

  805. 		                 TABLE_PREFIX."primary_resources_types prt,".

    806. 

  806. 		                 TABLE_PREFIX."secondary_resources sr,".

    807. 

  807. 		                 TABLE_PREFIX."secondary_resources_types srt,".

    808. 

  808. 		                 TABLE_PREFIX."content c

    809. 

  809. 		         WHERE pr.content_id=".$cid."

    810. 

  810. 			       AND pr.primary_resource_id = prt.primary_resource_id

    811. 

  811. 			       AND pr.primary_resource_id = sr.primary_resource_id

    812. 

  812. 			       AND sr.language_code='".$_SESSION['lang']."'

    813. 

  813. 			       AND sr.secondary_resource_id = srt.secondary_resource_id

    814. 

  814. 		           AND pr.content_id = c.content_id";

    815. 

  815. 		if ($only_on_secondary_type > 0) {

    816. 

  816. 			$sql .= " AND srt.type_id=".$only_on_secondary_type;

    817. 

  817. 		}

    818. 

  818. 		$sql .= " ORDER BY pr.primary_resource_id, prt.type_id";

    819. 

  819. 			

    820. 

  820. 		$rows = $dao->execute($sql);

    821. 

  821. 	

    822. 

  822. 		if (!is_array($rows)) {

    823. 

  823. 			if (!$info_only) {

    824. 

  824. 				return $content;

    825. 

  825. 			} else {

    826. 

  826. 				return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);

    827. 

  827. 			}

    828. 

  828. 		}

    829. 

  829. 		

    830. 

  830. 		$primary_resource_names = array();

    831. 

  831. 		foreach ($rows as $row) {

    832. 

  832. 			// if the primary resource is defined with multiple resource type,

    833. 

  833. 			// the primary resource would be replaced/appended multiple times.

    834. 

  834. 			// This is what we want at applying alternatives by default, but

    835. 

  835. 			// not when only one secondary type is chosen to apply.

    836. 

  836. 			// This fix is to remove the duplicates on the same primary resource.

    837. 

  837. 			// A dilemma of this fix is, for example, if the primary resource type

    838. 

  838. 			// is "text" and "visual", but

    839. 

  839. 			// $_SESSION['prefs']['PREF_ALT_TO_TEXT_APPEND_OR_REPLACE'] == 'replace'

    840. 

  840. 			// $_SESSION['prefs']['PREF_ALT_TO_VISUAL_APPEND_OR_REPLACE'] == 'append'

    841. 

  841. 			// so, should replace happen or append happen? With this fix, whichever

    842. 

  842. 			// the first in the sql return gets preserved in the array and processed.

    843. 

  843. 			// The further improvement is requried to keep rows based on the selected

    844. 

  844. 			// secondary type (http://www.atutor.ca/atutor/mantis/view.php?id=4598). 

    845. 

  845. 			if ($only_on_secondary_type > 0) {

    846. 

  846. 				if (in_array($row['resource'], $primary_resource_names)) {

    847. 

  847. 					continue;

    848. 

  848. 				} else {

    849. 

  849. 					$primary_resource_names[] = $row['resource'];

    850. 

  850. 				}

    851. 

  851. 			}

    852. 

  852. 			$alternative_rows[] = $row;

    853. 

  853.             

    854. 

  854.             $youtube_playURL = ContentUtility::convertYoutubeWatchURLToPlayURL($row['resource']);

    855. 

  855.             

    856. 

  856.             if ($row['resource'] <> $youtube_playURL) {

    857. 

  857.                 $row['resource'] = $youtube_playURL;

    858. 

  858.                 $alternative_rows[] = $row;

    859. 

  859.             }

    860. 

  860.         }

    861. 

  861. 

    862. 

  862.         foreach ($alternative_rows as $row) 

    863. 

  863. 		{

    864. 

  864. 			if ($info_only || $only_on_secondary_type ||

    865. 

  865. 			    ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_TEXT']==1 && $row['primary_type']==3 &&

    866. 

  866. 			    ($_SESSION['prefs']['PREF_ALT_TO_TEXT']=="audio" && $row['secondary_type']==1 || 

    867. 

  867. 			     $_SESSION['prefs']['PREF_ALT_TO_TEXT']=="visual" && $row['secondary_type']==4 || 

    868. 

  868. 			     $_SESSION['prefs']['PREF_ALT_TO_TEXT']=="sign_lang" && $row['secondary_type']==2)) ||

    869. 

  869. 			     

    870. 

  870. 			     ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_AUDIO']==1 && $row['primary_type']==1 &&

    871. 

  871. 			     ($_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="visual" && $row['secondary_type']==4 || 

    872. 

  872. 			      $_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="text" && $row['secondary_type']==3 || 

    873. 

  873. 			      $_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="sign_lang" && $row['secondary_type']==2)) ||

    874. 

  874. 			      

    875. 

  875. 			     ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_VISUAL']==1 && $row['primary_type']==4 &&

    876. 

  876. 			     ($_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="audio" && $row['secondary_type']==1 || 

    877. 

  877. 			      $_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="text" && $row['secondary_type']==3 || 

    878. 

  878. 			      $_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="sign_lang" && $row['secondary_type']==2))

    879. 

  879. 			    )

    880. 

  880. 			{

    881. 

  881. 				$ext = substr($row['secondary_resource'], strrpos($row['secondary_resource'], '.')+1);

    882. 

  882. 				

    883. 

  883. 				// alternative is video

    884. 

  884. 				if (in_array($ext, $video_exts)|| in_array($ext, $audio_exts) || 

    885. 

  885.                     preg_match("/http:\/\/.*youtube.com\/watch.*/", $row['secondary_resource'])) {

    886. 

  886.                     if (in_array($ext, $audio_exts)) {

    887. 

  887.                         // display audio medias in a smaller width/height (425 * 27)

    888. 

  888.                         // A hack for now to handle audio media player size

    889. 

  889.                         $target = '[media|'.$audio_width.'|'.$audio_height.']'.$row['secondary_resource'].'[/media]';

    890. 

  890.                     } else {

    891. 

  891.                         // use default media size for video medias

    892. 

  892.                         $target = '[media]'.$row['secondary_resource'].'[/media]';

    893. 

  893.                     }

    894. 

  894.                 }

    895. 

  895. 				// a text primary to be replaced by a visual alternative 

    896. 

  896. 				else if (in_array($ext, $txt_exts))

    897. 

  897. 				{

    898. 

  898. 					if ($row['content_path'] <> '') 

    899. 

  899. 						$file_location = $row['content_path'].'/'.$row['secondary_resource'];

    900. 

  900. 					else 

    901. 

  901. 						$file_location = $row['secondary_resource'];

    902. 

  902. 					

    903. 

  903. 					$file = TR_CONTENT_DIR.$_SESSION['course_id'] . '/'.$file_location;

    904. 

  904. 					$target = '<br />'.file_get_contents($file);

    905. 

  905. 					

    906. 

  906. 					// check whether html file

    907. 

  907. 					if (preg_match('/.*\<html.*\<\/html\>.*/s', $target))

    908. 

  908. 					{ // is a html file, use iframe to display

    909. 

  909. 						// get real path to the text file

    910. 

  910. 						if (defined('TR_FORCE_GET_FILE') && TR_FORCE_GET_FILE) {

    911. 

  911. 							$course_base_href = 'get.php/';

    912. 

  912. 						} else {

    913. 

  913. 							$course_base_href = 'content/' . $_SESSION['course_id'] . '/';

    914. 

  914. 						}

    915. 

  915. 		

    916. 

  916. 						$file = TR_BASE_HREF . $course_base_href.$file_location;

    917. 

  917. 							

    918. 

  918. 						$target = '<iframe width="100%" frameborder="0" class="autoHeight" scrolling="auto" src="'.$file.'"></iframe>';

    919. 

  919. 					}

    920. 

  920. 					else

    921. 

  921. 					{ // is a text file, insert/replace into content

    922. 

  922. 						$target = nl2br($target);

    923. 

  923. 					}

    924. 

  924. 				} 

    925. 

  925. 				else if (in_array($ext, $image_exts))

    926. 

  926. 					$target = '<img border="0" alt="'._AT('alternate_text').'" src="'.$row['secondary_resource'].'"/>';

    927. 

  927. 				// otherwise

    928. 

  928. 				else

    929. 

  929. 					$target = '<p><a href="'.$row['secondary_resource'].'">'.$row['secondary_resource'].'</a></p>';

    930. 

  930. 	

    931. 

  931. 				// replace or append the target alternative to the source

    932. 

  932. 				if (($row['primary_type']==3 && $_SESSION['prefs']['PREF_ALT_TO_TEXT_APPEND_OR_REPLACE'] == 'replace') ||

    933. 

  933. 					($row['primary_type']==1 && $_SESSION['prefs']['PREF_ALT_TO_AUDIO_APPEND_OR_REPLACE']=='replace') ||

    934. 

  934. 					($row['primary_type']==4 && $_SESSION['prefs']['PREF_ALT_TO_VISUAL_APPEND_OR_REPLACE']=='replace'))

    935. 

  935. 					$pattern_replace_to = '${1}'."\n".$target."\n".'${3}';

    936. 

  936.                 else

    937. 

  937.                     $pattern_replace_to = '${1}${2}'."<br /><br />\n".$target."\n".'${3}';

    938. 

  938. 

    939. 

  939.                 // *** Alternative replace/append starts from here ***

    940. 

  940.                 $processed = false;    // one primary resource is only processed once 

    941. 

  941.                 

    942. 

  942.                 // append/replace target alternative to [media]source[/media]

    943. 

  943.                 if (!$processed && preg_match("/".preg_quote("[media").".*".preg_quote("]".$row['resource']."[/media]", "/")."/sU", $content))

    944. 

  944.                 {

    945. 

  945.                     $processed = true;

    946. 

  946. 					if (!$info_only) {

    947. 

  947. 						$content = preg_replace("/(.*)(".preg_quote("[media").".*".preg_quote("]".$row['resource']."[/media]", "/").")(.*)/sU", 

    948. 

  948. 				             $pattern_replace_to, $content);

    949. 

  949. 					} else {

    950. 

  950. 						if ($row['secondary_type'] == 1) $has_audio_alternative = true;

    951. 

  951. 						if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;

    952. 

  952. 						if ($row['secondary_type'] == 3) $has_text_alternative = true;

    953. 

  953. 						if ($row['secondary_type'] == 4) $has_visual_alternative = true;

    954. 

  954. 					}

    955. 

  955. 				}

    956. 

  956. 				

    957. 

  957. 				// append/replace target alternative to <img ... src="source" ...></a>

    958. 

  958. 				if (!$processed && preg_match("/\<img.*src=\"".preg_quote($row['resource'], "/")."\".*\/\>/sU", $content))

    959. 

  959.                 {

    960. 

  960.                     $processed = true;

    961. 

  961. 					if (!$info_only) {

    962. 

  962. 						$content = preg_replace("/(.*)(\<img.*src=\"".preg_quote($row['resource'], "/")."\".*\/\>)(.*)/sU", 

    963. 

  963. 			                                $pattern_replace_to, $content);

    964. 

  964. 					} else {

    965. 

  965. 						if ($row['secondary_type'] == 1) $has_audio_alternative = true;

    966. 

  966. 						if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;

    967. 

  967. 						if ($row['secondary_type'] == 3) $has_text_alternative = true;

    968. 

  968. 						if ($row['secondary_type'] == 4) $has_visual_alternative = true;

    969. 

  969. 					}

    970. 

  970. 				}

    971. 

  971. 				

    972. 

  972. 				// append/replace target alternative to <object ... source ...></object>

    973. 

  973.                 if (!$processed && preg_match("/\<object.*".preg_quote($row['resource'], "/").".*\<\/object\>/sU", $content))

    974. 

  974.                 {

    975. 

  975.                     $processed = true;

    976. 

  976.                     if (!$info_only) {

    977. 

  977.                         $content = preg_replace("/(.*)(\<object.*".preg_quote($row['resource'], "/").".*\<\/object\>)(.*)/sU", 

    978. 

  978. 			                                $pattern_replace_to, $content);

    979. 

  979. 					} else {

    980. 

  980. 						if ($row['secondary_type'] == 1) $has_audio_alternative = true;

    981. 

  981. 						if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;

    982. 

  982. 						if ($row['secondary_type'] == 3) $has_text_alternative = true;

    983. 

  983. 						if ($row['secondary_type'] == 4) $has_visual_alternative = true;

    984. 

  984. 					}

    985. 

  985. 				}

    986. 

  986. 	

    987. 

  987. 				// append/replace target alternative to <a>...source...</a> or <a ...source...>...</a>

    988. 

  988.                 // skip this "if" when the source object has been processed in aboved <img> tag

    989. 

  989.                 if (!$processed && preg_match("/\<a.*".preg_quote($row['resource'], "/").".*\<\/a\>/sU", $content))

    990. 

  990.                 {

    991. 

  991.                     $processed = true;

    992. 

  992.                     if (!$info_only) {

    993. 

  993.                         $content = preg_replace("/(.*)(\<a.*".preg_quote($row['resource'], "/").".*\<\/a\>)(.*)/sU",

    994. 

  994. 			                                $pattern_replace_to, $content);

    995. 

  995. 					} else {

    996. 

  996. 						if ($row['secondary_type'] == 1) $has_audio_alternative = true;

    997. 

  997. 						if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;

    998. 

  998. 						if ($row['secondary_type'] == 3) $has_text_alternative = true;

    999. 

  999. 						if ($row['secondary_type'] == 4) $has_visual_alternative = true;

    1000. 

  1000. 					}

    1001. 

  1001. 				}

    1002. 

  1002. 	

    1003. 

  1003. 				// append/replace target alternative to <embed ... source ...>

    1004. 

  1004. 				if (!$processed && preg_match("/\<embed.*".preg_quote($row['resource'], "/").".*\>/sU", $content))

    1005. 

  1005.                 {

    1006. 

  1006.                     $processed = true;

    1007. 

  1007. 					if (!$info_only) {

    1008. 

  1008. 						$content = preg_replace("/(.*)(\<embed.*".preg_quote($row['resource'], "/").".*\>)(.*)/sU", 

    1009. 

  1009. 			                                $pattern_replace_to, $content);

    1010. 

  1010. 					} else {

    1011. 

  1011. 						if ($row['secondary_type'] == 1) $has_audio_alternative = true;

    1012. 

  1012. 						if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;

    1013. 

  1013. 						if ($row['secondary_type'] == 3) $has_text_alternative = true;

    1014. 

  1014. 						if ($row['secondary_type'] == 4) $has_visual_alternative = true;

    1015. 

  1015. 					}

    1016. 

  1016. 				}

    1017. 

  1017. 			}

    1018. 

  1018. 		}

    1019. 

  1019. 		

    1020. 

  1020. 		if (!$info_only) {

    1021. 

  1021. 			return $content;

    1022. 

  1022. 		} else {

    1023. 

  1023. 			return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);

    1024. 

  1024. 		}

    1025. 

  1025. 	}	

    1026. 

  1026. 		

    1027. 

  1027. 	/**

    1028. 

  1028. 	 * This function save the last content_id accessed by current user on a course into db and set $_SESSION['s_cid']

    1029. 

  1029. 	 * @access: public

    1030. 

  1030. 	 * @param: $content_id

    1031. 

  1031. 	 * @return: save $content_id, the last visited one of the current user, into db and session

    1032. 

  1032. 	 */

    1033. 

  1033. 	public static function saveLastCid($content_id)

    1034. 

  1034. 	{

    1035. 

  1035. 		global $_course_id;

    1036. 

  1036. 		

    1037. 

  1037. 		if (!$content_id || !isset($_SESSION['user_id'])) return;

    1038. 

  1038. 		

    1039. 

  1039. 		include_once(TR_INCLUDE_PATH.'classes/DAO/UserCoursesDAO.class.php');

    1040. 

  1040. 		

    1041. 

  1041. 		$userCoursesDAO = new UserCoursesDAO();

    1042. 

  1042. 		if ($userCoursesDAO->isExist($_SESSION['user_id'], $_course_id))

    1043. 

  1043. 		{

    1044. 

  1044. 			$userCoursesDAO->UpdateLastCid($_SESSION['user_id'], $_course_id, $content_id);

    1045. 

  1045. 			$_SESSION['s_cid'] = $content_id;

    1046. 

  1046. 		}

    1047. 

  1047. 	}

    1048. 

  1048. }

    1049. 

  1049. ?>
    1050.