2 /************************************************************************/
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4 /************************************************************************/
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5 /* Copyright (c) 2010 */
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6 /* Inclusive Design Institute */
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8 /* This program is free software. You can redistribute it and/or */
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9 /* modify it under the terms of the GNU General Public License */
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10 /* as published by the Free Software Foundation. */
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11 /************************************************************************/
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14 * Content Utility functions
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16 * @author Cindy Qi Li
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19 if (!defined('TR_INCLUDE_PATH')) exit;
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21 class ContentUtility {
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24 * This function cuts out html body
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26 * @param $text html text
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27 * @author Cindy Qi Li
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29 public static function getHtmlBody($text) {
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30 /* strip everything before <body> */
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31 $start_pos = strpos(strtolower($text), '<body');
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32 if ($start_pos !== false) {
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33 $start_pos += strlen('<body');
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34 $end_pos = strpos(strtolower($text), '>', $start_pos);
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35 $end_pos += strlen('>');
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37 $text = substr($text, $end_pos);
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40 /* strip everything after </body> */
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41 $end_pos = strpos(strtolower($text), '</body>');
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42 if ($end_pos !== false) {
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43 $text = trim(substr($text, 0, $end_pos));
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50 * This function cuts out requested tag information from html head
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52 * @param $text html text
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53 * @param $tags a string or an array of requested tags
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54 * @author Cindy Qi Li
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56 public static function getHtmlHeadByTag($text, $tags)
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58 $head = ContentUtility::getHtmlHead($text);
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61 if (!is_array($tags) && strlen(trim($tags)) > 0)
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63 $tags = array(trim($tags));
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65 foreach ($tags as $tag)
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67 $tag = strtolower($tag);
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69 /* strip everything before <{tag}> */
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70 $start_pos = stripos($head, '<'.$tag);
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73 while ($start_pos !== false)
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75 $temp_text = substr($temp_head, $start_pos);
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77 /* strip everything after </{tag}> or />*/
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78 $end_pos = stripos($temp_text, '</' . $tag . '>');
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80 if ($end_pos !== false)
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82 $end_pos += strlen('</' . $tag . '>');
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84 // add an empty line after each tag information
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85 $rtn_text .= trim(substr($temp_text, 0, $end_pos)) . '
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89 else // match /> as ending tag if </tag> is not found
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91 $end_pos = stripos($temp_text, '/>');
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93 if($end_pos === false && stripos($temp_text, $tag.'>')===false){
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94 //if /> is not found, then this is not a valid XHTML
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95 //text iff it's not tag>
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96 $end_pos = stripos($temp_text, '>');
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97 $end_pos += strlen('>');
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99 $end_pos += strlen('/>');
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101 // add an empty line after each tag information
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102 $rtn_text .= trim(substr($temp_text, 0, $end_pos)) . '
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107 // initialize vars for next round of matching
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108 $temp_head = substr($temp_text, $end_pos);
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109 $start_pos = stripos($temp_head, '<'.$tag);
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116 * This function cuts out html head
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118 * @param $text html text
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119 * @author Cindy Qi Li
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121 private static function getHtmlHead ($text) {
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122 /* strip everything before <head> */
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123 $start_pos = stripos($text, '<head');
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124 if ($start_pos !== false) {
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125 $start_pos += strlen('<head');
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126 $end_pos = stripos($text, '>', $start_pos);
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127 $end_pos += strlen('>');
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129 $text = substr($text, $end_pos);
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132 /* strip everything after </head> */
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133 $end_pos = stripos($text, '</head');
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134 if ($end_pos !== false) {
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135 $text = trim(substr($text, 0, $end_pos));
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140 private static function embedFLV($text) {
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141 global $content_base_href;
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143 $media_replace = array();
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144 $media_matches = array();
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145 $flowplayerholder_class = "atutor.flowplayerholder"; // style class used to play flowplayer medias
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146 $flowplayerholder_def = '$f("*.'.$flowplayerholder_class.'"'; // javascript definition for atutor.flowplayerholder
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149 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+)\.flv\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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150 $media_replace[] ="<object>\n".
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152 " <a class=\"".$flowplayerholder_class."\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"##MEDIA1##.flv\"></a>\n".
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154 " <div style=\"margin-top:-2em;\">\n".
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155 " <a href=\"##MEDIA1##.flv\">##MEDIA1##.flv</a>\n".
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160 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+)\.mp4\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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161 //$media_replace[] ="<a class=\"".$flowplayerholder_class."\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"".AT_BASE_HREF."get.php/".$_content_base_href."##MEDIA1##.mp4\"></a>";
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162 $media_replace[] ="<object>\n".
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164 " <a class=\"".$flowplayerholder_class."\" style=\"display:block;width:##WIDTH##px;height:##HEIGHT##px;\" href=\"##MEDIA1##.mp4\"></a>\n".
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166 " <div style=\"margin-top:-2em;\">\n".
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167 " <a href=\"##MEDIA1##.mp4\">##MEDIA1##.mp4</a>\n".
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170 // Executing the replace
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171 for ($i=0;$i<count($media_replace);$i++){
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172 foreach($media_matches[$i] as $media)
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174 //find width and height for each matched media
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175 if (preg_match("/\[media\|([0-9]*)\|([0-9]*)\]*/", $media[0], $matches))
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177 $width = $matches[1];
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178 $height = $matches[2];
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186 //replace media tags with embedded media for each media tag
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187 $media_input = $media_replace[$i];
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188 $media_input = str_replace("##WIDTH##","$width",$media_input);
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189 $media_input = str_replace("##HEIGHT##","$height",$media_input);
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190 $media_input = str_replace("##MEDIA1##","$media[1]",$media_input);
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191 $media_input = str_replace("##MEDIA2##","$media[2]",$media_input);
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192 $text = str_replace($media[0],$media_input,$text);
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196 // Include the javascript only if:
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197 // 1. $flowplayerholder_class is used but not defined
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198 // 2. exclude from export common cartridge or content package
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199 if (strpos($text, $flowplayerholder_class)
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200 && !strpos($text, $flowplayerholder_def)
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201 && !strpos($_SERVER['PHP_SELF'], "ims_export.php"))
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203 $text .= '<script type="text/javascript">
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204 '.$flowplayerholder_def.', "'.TR_BASE_HREF.'include/jscripts/flowplayer/flowplayer-3.2.4.swf", {
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207 baseUrl: \''.TR_BASE_HREF.'get.php/'.$content_base_href.'\'},
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223 * This function converts the youtube playable url used in <object> tag (for instance: http://www.youtube.com/v/a0ryB0m0MiM)
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224 * to youtube url that is used to browse (for instance: http://www.youtube.com/watch?v=a0ryB0m0MiM)
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225 * @param: youtube playable URL. For instance, http://www.youtube.com/v/a0ryB0m0MiM
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226 * @return: if the param is a youtube playable url, return the according youtube URL used to browse.
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227 * For instance: http://www.youtube.com/watch?v=a0ryB0m0MiM
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228 * Otherwise, return the original send-in parameter.
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230 public function convertYoutubePlayURLToWatchURL($youtube_playURL) {
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231 return preg_replace("/(http:\/\/[a-z0-9\.]*)?youtube.com\/v\/(.*)/",
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232 "\\1youtube.com/watch?v=\\2", $youtube_playURL);
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236 * This function converts the youtube url that is used to browse (for instance: http://www.youtube.com/watch?v=a0ryB0m0MiM)
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237 * to youtube playable url used in <object> tag (for instance: http://www.youtube.com/v/a0ryB0m0MiM)
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238 * @param: the youtube URL used to browse.
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239 * For instance: http://www.youtube.com/watch?v=a0ryB0m0MiM
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240 * @return: if the param is a youtube url used to browse, return the according youtube playable URL.
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241 * For instance, http://www.youtube.com/v/a0ryB0m0MiM
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242 * Otherwise, return the original send-in parameter.
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244 public function convertYoutubeWatchURLToPlayURL($youtube_watchURL) {
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245 return preg_replace("/(http:\/\/[a-z0-9\.]*)?youtube.com\/watch\?v=(.*)/",
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246 "\\1youtube.com/v/\\2", $youtube_watchURL);
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249 public static function embedMedia($text) {
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250 if (preg_match("/\[media(\|[0-9]+\|[0-9]+)?\]*/", $text)==0){
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254 // remove the spaces in [media] tag, otherwise, the next line converts URL inside [media] into <a> tag
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255 $text = preg_replace("/(\[media\])([\s]*)(.*)(\[\/media\])/", '$1$3$4', $text);
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256 $text = preg_replace("/(\[media\])(.*)([\s]*)(\[\/media\])/U", '$1$2$4', $text);
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258 $media_matches = array();
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259 $media_replace = array();
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261 // First, we search though the text for all different kinds of media defined by media tags and store the results in $media_matches.
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262 // Then the different replacements for the different media tags are stored in $media_replace.
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263 // 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.
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266 preg_match_all("#\[media[0-9a-z\|]*\]http://([a-z0-9\.]*)?youtube.com/watch\?v=(.*)\[/media\]#iU",$text,$media_matches[],PREG_SET_ORDER);
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267 $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>';
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270 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mpg\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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271 $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>";
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274 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).avi\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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275 $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>";
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278 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).wmv\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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279 $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>";
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282 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mov\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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283 $media_replace[] = "<object classid=\"clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B\" codebase=\"http://www.apple.com/qtactivex/qtplugin.cab\" width=\"##WIDTH##\" height=\"##HEIGHT##\">\n".
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284 " <param name=\"src\" value=\"##MEDIA1##.mov\">\n".
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285 " <param name=\"controller\" value=\"true\">\n".
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286 " <param name=\"autoplay\" value=\"false\">\n".
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287 " <!--[if gte IE 7] > <!-->\n".
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288 " <object type=\"video/quicktime\" data=\"##MEDIA1##.mov\" width=\"##WIDTH##\" height=\"##HEIGHT##\">\n".
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289 " <param name=\"controller\" value=\"true\">\n".
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290 " <param name=\"autoplay\" value=\"false\">\n".
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291 " <a href=\"##MEDIA1##.mov\">##MEDIA1##.mov</a>\n".
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293 " <!--<![endif]-->\n".
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294 " <!--[if lt IE 7]>\n".
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295 " <a href=\"##MEDIA1##.mov\">##MEDIA1##.mov</a>\n".
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300 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).swf\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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301 $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>";
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304 preg_match_all("#\[media[0-9a-z\|]*\]([.\w\d]+[^\s\"]+).mp3\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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305 $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>";
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308 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).wav\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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309 $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>";
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312 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).ogg\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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313 $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>";
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316 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).ogm\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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317 $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>";
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320 preg_match_all("#\[media[0-9a-z\|]*\](.+[^\s\"]+).mid\[/media\]#i",$text,$media_matches[],PREG_SET_ORDER);
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321 $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>";
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323 $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>", $text);
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325 // Executing the replace
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326 for ($i=0;$i<count($media_replace);$i++){
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327 foreach($media_matches[$i] as $media)
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330 //find width and height for each matched media
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331 if (preg_match("/\[media\|([0-9]*)\|([0-9]*)\]*/", $media[0], $matches))
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333 $width = $matches[1];
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334 $height = $matches[2];
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342 //replace media tags with embedded media for each media tag
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343 $media_input = $media_replace[$i];
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344 $media_input = str_replace("##WIDTH##","$width",$media_input);
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345 $media_input = str_replace("##HEIGHT##","$height",$media_input);
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346 $media_input = str_replace("##MEDIA1##","$media[1]",$media_input);
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347 $media_input = str_replace("##MEDIA2##","$media[2]",$media_input);
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348 $text = str_replace($media[0],$media_input,$text);
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355 public static function makeClickable($text) {
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356 $text = ContentUtility::embedMedia($text);
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358 // convert plain text URL to clickable URL.
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359 // Limited conversion: It doesn't cover the case when the stuff in front of the URL is not a word. For example:
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360 // <p>http://google.ca</p>
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361 // "http://google.ca"
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362 $text = preg_replace('/(^|[\n ])([\w]*?)((?<!(\[media\]))http(s)?:\/\/[\w]+[^ \,\"\n\r\t\)<]*)/is',
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363 '$1$2<a href="$3">$3</a>', $text);
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365 // convert email address to clickable URL that pops up "send email" interface with the address filled in
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366 $text = preg_replace('/(?|<a href="mailto[\s]*:[\s]*([_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'\@'
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367 .'[_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'(\.[a-zA-Z]{1,6})+)">(.*)<\/a>'
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368 .'|((((([_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'\@'
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369 .'[_a-zA-Z0-9\-]+(\.[_a-zA-Z0-9\-]+)*'.'(\.[a-zA-Z]{1,6})+))))))/i',
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370 "<a href=\"mailto:\\1\">\\5</a>",
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373 // flv conversion needs to come after url conversion (2 lines above) otherwise the url to flowplayer swf file
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374 // in the script for a.flowplayerholder is converted
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375 $text = ContentUtility::embedFLV($text);
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380 public static function myCodes($text, $html = false) {
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381 global $_base_path;
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382 global $HTTP_USER_AGENT;
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384 if (substr($HTTP_USER_AGENT,0,11) == 'Mozilla/4.7') {
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385 $text = str_replace('[quote]','</p><p class="block">',$text);
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386 $text = str_replace('[/quote]','</p><p>',$text);
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388 $text = str_replace('[reply]','</p><p class="block">',$text);
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389 $text = str_replace('[/reply]','</p><p>',$text);
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391 $text = str_replace('[quote]','<blockquote>',$text);
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392 $text = str_replace('[/quote]','</blockquote><p>',$text);
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394 $text = str_replace('[reply]','</p><blockquote class="block"><p>',$text);
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395 $text = str_replace('[/reply]','</p></blockquote><p>',$text);
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398 $text = str_replace('[b]','<strong>',$text);
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399 $text = str_replace('[/b]','</strong>',$text);
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401 $text = str_replace('[i]','<em>',$text);
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402 $text = str_replace('[/i]','</em>',$text);
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404 $text = str_replace('[u]','<u>',$text);
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405 $text = str_replace('[/u]','</u>',$text);
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407 $text = str_replace('[center]','<center>',$text);
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408 $text = str_replace('[/center]','</center><p>',$text);
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411 $text = str_replace('[blue]','<span style="color: blue;">',$text);
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412 $text = str_replace('[/blue]','</span>',$text);
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414 $text = str_replace('[orange]','<span style="color: orange;">',$text);
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415 $text = str_replace('[/orange]','</span>',$text);
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417 $text = str_replace('[red]','<span style="color: red;">',$text);
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418 $text = str_replace('[/red]','</span>',$text);
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420 $text = str_replace('[purple]','<span style="color: purple;">',$text);
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421 $text = str_replace('[/purple]','</span>',$text);
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423 $text = str_replace('[green]','<span style="color: green;">',$text);
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424 $text = str_replace('[/green]','</span>',$text);
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426 $text = str_replace('[gray]','<span style="color: gray;">',$text);
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427 $text = str_replace('[/gray]','</span>',$text);
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429 $text = str_replace('[op]','<span class="bigspacer"></span> <a href="',$text);
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430 $text = str_replace('[/op]','">'._AT('view_entire_post').'</a>',$text);
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432 $text = str_replace('[head1]','<h2>',$text);
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433 $text = str_replace('[/head1]','</h2>',$text);
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435 $text = str_replace('[head2]','<h3>',$text);
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436 $text = str_replace('[/head2]','</h3>',$text);
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438 $text = str_replace('[cid]',$_base_path.'content.php?_cid='.$_SESSION['s_cid'],$text);
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440 global $sequence_links, $_course_id, $_content_id;
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441 if ($_course_id > 0 && !isset($sequence_links) && $_content_id > 0) {
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442 global $contentManager;
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443 $sequence_links = $contentManager->generateSequenceCrumbs($_content_id);
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445 if (isset($sequence_links['previous']) && $sequence_links['previous']['url']) {
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446 $text = str_replace('[pid]', $sequence_links['previous']['url'], $text);
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448 if (isset($sequence_links['next']) && $sequence_links['next']['url']) {
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449 $text = str_replace('[nid]', $sequence_links['next']['url'], $text);
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451 if (isset($sequence_links['resume']) && $sequence_links['resume']['url']) {
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452 $text = str_replace('[nid]', $sequence_links['resume']['url'], $text);
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454 if (isset($sequence_links['first']) && $sequence_links['first']['url']) {
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455 $text = str_replace('[fid]', $sequence_links['first']['url'], $text);
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458 /* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */
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459 $html = !$html ? 0 : 1;
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461 // little hack added by greg to add syntax highlighting without using <?php \?\>
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463 $text = str_replace("[code]","[code]<?php",$text);
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464 $text = str_replace("[/code]","?>[/code]",$text);
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466 $text = preg_replace("/\[code\]\s*(.*)\s*\[\\/code\]/Usei", "ContentUtility::highlightCode(ContentUtility::fixQuotes('\\1'), $html)", $text);
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467 // now remove the <?php added above and leave the syntax colour behind.
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468 $text = str_replace("<?php", "", $text);
\r
469 $text = str_replace("?>", "", $text);
\r
474 /* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */
\r
475 private static function highlightCode($code, $html) {
\r
476 // XHTMLize PHP highlight_string output until it gets fixed in PHP
\r
477 static $search = array(
\r
483 static $replace = array(
\r
489 $code = str_replace('<', '<', $code);
\r
490 $code = str_replace("\r", '', $code);
\r
493 return str_replace($search, $replace, highlight_string($code, true));
\r
496 /* contributed by Thomas M. Duffey <tduffey at homeboyz.com> */
\r
497 private static function fixQuotes($text){
\r
498 return str_replace('\\"', '"', $text);
\r
501 public static function imageReplace($text) {
\r
502 /* image urls do not require http:// */
\r
504 // $text = eregi_replace("\[image(\|)?([[:alnum:][:space:]]*)\]" .
\r
506 // "([[:alnum:]#?/&=:\"'_.-]+)" .
\r
508 // "((\[/image\])|(.*\[/image\]))",
\r
509 // "<img src=\"\\3\" alt=\"\\2\" />",
\r
512 $text = preg_replace("/\[image(\|)?([a-zA-Z0-9\s]*)\]".
\r
514 "([a-zA-Z0-9\#\?\/\&\=\:\\\"\'\_\.\-]+)[\s]*".
\r
515 "((\[\/image\])|(.*\[\/image\]))/i",
\r
516 "<img src=\"\\3\" alt=\"\\2\" />",
\r
522 private static function formatFinalOutput($text, $nl2br = true) {
\r
523 global $_base_path;
\r
525 $text = str_replace('CONTENT_DIR/', '', $text);
\r
527 return nl2br(ContentUtility::imageReplace(ContentUtility::makeClickable(ContentUtility::myCodes(' '.$text, false))));
\r
530 return ContentUtility::imageReplace(ContentUtility::makeClickable(ContentUtility::myCodes(' '.$text, true)));
\r
534 * This function converts the input string into AContent html content string
\r
536 * @param $input: input string
\r
537 * $html: whether the input is in html
\r
538 * @return converted AContent html content string
\r
539 * @author Cindy Qi Li
\r
541 public static function formatContent($input, $html = 0) {
\r
542 global $_base_path, $_config;
\r
545 $input = str_replace('<', '<', $input);
\r
546 $input = str_replace('<?php', '<?php', $input); // for bug #2087
\r
547 } elseif ($html==2) {
\r
548 $output = '<iframe width="100%" frameborder="0" id="content_frame" marginheight="0" marginwidth="0" src="'.$input.'"></iframe>';
\r
549 $output .= '<script type="text/javascript">
\r
550 function resizeIframe() {
\r
551 var height = document.documentElement.clientHeight;
\r
553 // not sure how to get this dynamically
\r
554 height -= 20; /* whatever you set your body bottom margin/padding to be */
\r
556 document.getElementById(\'content_frame\').style.height = height +"px";
\r
559 document.getElementById(\'content_frame\').onload = resizeIframe;
\r
560 window.onresize = resizeIframe;
\r
565 /* Commented by Cindy Qi Li on Jan 12, 2010
\r
566 * AContent does not support glossary
\r
567 // do the glossary search and replace:
\r
568 if (is_array($glossary)) {
\r
569 foreach ($glossary as $k => $v) {
\r
570 $k = urldecode($k);
\r
571 $v = str_replace("\n", '<br />', $v);
\r
572 $v = str_replace("\r", '', $v);
\r
574 // escape special characters
\r
575 $k = preg_quote($k);
\r
577 $k = str_replace('<', '<', $k);
\r
578 $k = str_replace('/', '\/', $k);
\r
580 $original_term = $k;
\r
581 $term = $original_term;
\r
583 $term = '(\s*'.$term.'\s*)';
\r
584 $term = str_replace(' ','((<br \/>)*\s*)', $term);
\r
586 $def = htmlspecialchars($v, ENT_QUOTES, 'UTF-8');
\r
588 $input = preg_replace
\r
589 ("/(\[\?\])$term(\[\/\?\])/i",
\r
590 '<a href="'.$simple.'glossary.html#'.urlencode($original_term).'" target="body" class="at-term">\\2</a>',
\r
593 $input = preg_replace
\r
594 ("/(\[\?\])$term(\[\/\?\])/i",
\r
595 '\\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
598 } else if (!$user_glossary) {
\r
599 $input = str_replace(array('[?]','[/?]'), '', $input);
\r
604 $input = str_replace('CONTENT_DIR', '', $input);
\r
606 if (isset($_config['latex_server']) && $_config['latex_server']) {
\r
607 // see: http://www.forkosh.com/mimetex.html
\r
608 $input = preg_replace('/\[tex\](.*?)\[\/tex\]/sie', "'<img src=\"'.\$_config['latex_server'].rawurlencode('$1').'\" align=\"middle\">'", $input);
\r
612 $x = ContentUtility::formatFinalOutput($input, false);
\r
616 // the following has been taken out for this:
\r
617 // http://atutor.ca/atutor/mantis/view.php?id=4593
\r
618 // @date Oct 18, 2010
\r
619 // $output = ContentUtility::formatFinalOutput($input);
\r
621 $output = '<p>'.$input.'</p>';
\r
627 * This function returns html string of "table of content"
\r
629 * @param: $content: a string
\r
630 * @return: a html string of "table of content"
\r
632 public static function getContentTable($content)
\r
634 preg_match_all("/<(h[\d]+)[^>]*>(.*)<\/(\s*)\\1(\s*)>/i", $content, $found_headers, PREG_SET_ORDER);
\r
636 if (count($found_headers) == 0) return array("", $content);
\r
639 $num_of_headers = 0;
\r
641 for ($i = 0; $i < count($found_headers); $i++)
\r
643 $div_id = "_header_" . $num_of_headers++;
\r
647 $content_table = "<div id=\"toc\">\n<fieldset id=\"toc\"><legend>". _AT("table_of_contents")."</legend>\n";
\r
650 $content = str_replace($found_headers[$i][0], '<div id="'.$div_id.'">'.$found_headers[$i][0].'</div>', $content);
\r
651 $content_table .= '<a href="'.$_SERVER["REQUEST_URI"].'#'.$div_id.'" class="'.$found_headers[$i][1].'">'. $found_headers[$i][2]."</a>\n";
\r
653 if ($i == count($found_headers) - 1)
\r
655 $content_table .= "</fieldset></div><br />";
\r
658 return array($content_table, $content);
\r
663 * This function returns an array of content tools' shortcuts
\r
665 * @param: $content_row: an array of the current content information
\r
666 * @return: an array of all the tool short cuts that apply to the current content or content folder
\r
668 public static function getToolShortcuts($content_row)
\r
670 global $_current_user, $_base_href, $contentManager, $_course_id;
\r
672 if (((!$content_row['content_parent_id'] && ($_SESSION['packaging'] == 'top'))
\r
673 || ($_SESSION['packaging'] == 'all'))
\r
674 || (isset($_current_user) && $_current_user->isAuthor($_course_id))) {
\r
676 $tool_shortcuts[] = array(
\r
677 'title' => _AT('export_content_in_cp'),
\r
678 'url' => $_base_href . 'home/ims/ims_export.php?_cid='.$content_row['content_id'],
\r
679 'icon' => $_base_href . 'themes/'.$_SESSION['prefs']['PREF_THEME'].'/images/export.png');
\r
680 $tool_shortcuts[] = array(
\r
681 'title' => _AT('export_content_in_cc'),
\r
682 'url' => $_base_href . 'home/imscc/ims_export.php?_cid='.$content_row['content_id'].SEP.'to_a4a=1',
\r
683 'icon' => $_base_href . 'themes/'.$_SESSION['prefs']['PREF_THEME'].'/images/export_cc.png');
\r
686 if (isset($_current_user) && $_current_user->isAuthor($_course_id)) {
\r
687 if ($content_row['content_type'] == CONTENT_TYPE_CONTENT || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {
\r
688 $tool_shortcuts[] = array(
\r
689 'title' => _AT('edit_this_page'),
\r
690 'url' => $_base_href . 'home/editor/edit_content.php?_cid='.$content_row['content_id'],
\r
691 'icon' => $_base_href . 'images/medit.gif');
\r
694 $tool_shortcuts[] = array(
\r
695 'title' => _AT('add_sibling_folder'),
\r
696 'url' => $_base_href .
\r
697 'home/editor/edit_content_folder.php?pid='.$contentManager->_menu_info[$content_row['content_id']]['content_parent_id'].SEP.'_course_id='.$_course_id,
\r
698 'icon' => $_base_href . 'images/add_sibling_folder.gif');
\r
700 if ($content_row['content_type'] == CONTENT_TYPE_FOLDER || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {
\r
701 $tool_shortcuts[] = array(
\r
702 'title' => _AT('add_sub_folder'),
\r
703 'url' => $_base_href .
\r
704 'home/editor/edit_content_folder.php?_course_id='.$_course_id.SEP.'pid='.$content_row['content_id'],
\r
705 'icon' => $_base_href . 'images/add_sub_folder.gif');
\r
708 $tool_shortcuts[] = array(
\r
709 'title' => _AT('add_sibling_page'),
\r
710 'url' => $_base_href .
\r
711 'home/editor/edit_content.php?pid='.$contentManager->_menu_info[$content_row['content_id']]['content_parent_id'].SEP.'_course_id='.$_course_id,
\r
712 'icon' => $_base_href . 'images/add_sibling_page.gif');
\r
714 if ($content_row['content_type'] == CONTENT_TYPE_CONTENT || $content_row['content_type'] == CONTENT_TYPE_WEBLINK) {
\r
715 $tool_shortcuts[] = array(
\r
716 'title' => _AT('delete_this_page'),
\r
717 'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$content_row['content_id'],
\r
718 'icon' => $_base_href . 'images/page_delete.gif');
\r
720 else if ($content_row['content_type'] == CONTENT_TYPE_FOLDER) {
\r
721 $tool_shortcuts[] = array(
\r
722 'title' => _AT('add_sub_page'),
\r
723 'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$content_row['content_id'],
\r
724 'icon' => $_base_href . 'images/add_sub_page.gif');
\r
726 $tool_shortcuts[] = array(
\r
727 'title' => _AT('delete_this_folder'),
\r
728 'url' => $_base_href . 'home/editor/delete_content.php?_cid='.$content_row['content_id'],
\r
729 'icon' => $_base_href . 'images/page_delete.gif');
\r
732 return $tool_shortcuts;
\r
734 // if (isset($_current_user) && $_current_user->isAuthor($_course_id)) {
\r
735 // $shortcuts[] = array('title' => _AT('add_sub_folder'), 'url' => $_base_href . 'home/editor/edit_content_folder.php?_course_id='.$_course_id.'pid='.$cid);
\r
737 //// $shortcuts[] = array('title' => _AT('add_top_page'), 'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id, 'icon' => $_base_href . 'images/page_add.gif');
\r
738 // if ($contentManager->_menu_info[$cid]['content_parent_id']) {
\r
739 // $shortcuts[] = array('title' => _AT('add_sibling_page'), 'url' => $_base_href .
\r
740 // 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$contentManager->_menu_info[$cid]['content_parent_id'], 'icon' => $_base_href . 'images/page_add_sibling.gif');
\r
743 // $shortcuts[] = array('title' => _AT('add_sub_page'), 'url' => $_base_href . 'home/editor/edit_content.php?_course_id='.$_course_id.SEP.'pid='.$cid);
\r
744 // $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
749 * replace source object with alternatives according to user's preferences
\r
751 * @param $cid: content id.
\r
752 * @param $content: the original content page ($content_row['text'], from content.php).
\r
753 * @param $info_only: when "true", return the array of info (has_text_alternative, has_audio_alternative, has_visual_alternative, has_sign_lang_alternative)
\r
754 * @param $only_on_secondary_type:
\r
755 * @return string $content: the content page with the appropriated resources.
\r
756 * @see $db from include/vitals.inc.php
\r
757 * @author Cindy Qi Li
\r
759 public static function applyAlternatives($cid, $content, $info_only = false, $only_on_secondary_type = 0){
\r
760 global $db, $_course_id;
\r
762 include_once(TR_INCLUDE_PATH.'classes/DAO/DAO.class.php');
\r
765 $video_exts = array("mpg", "avi", "wmv", "mov", "swf", "mp4", "flv");
\r
767 $audio_exts = array("mp3", "wav", "ogg", "mid");
\r
768 $audio_width = 425;
\r
769 $audio_height = 27;
\r
771 $txt_exts = array("txt", "html", "htm");
\r
772 $image_exts = array("gif", "bmp", "png", "jpg", "jpeg", "png", "tif");
\r
773 $only_on_secondary_type = intval($only_on_secondary_type);
\r
775 // intialize the 4 returned values when $info_only is on
\r
778 $has_text_alternative = false;
\r
779 $has_audio_alternative = false;
\r
780 $has_visual_alternative = false;
\r
781 $has_sign_lang_alternative = false;
\r
784 if (!$info_only && !$only_on_secondary_type &&
\r
785 ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_TEXT']==0) &&
\r
786 ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_AUDIO']==0) &&
\r
787 ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_VISUAL']==0))
\r
789 //No user's preferences related to content format are declared
\r
793 return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);
\r
797 // get all relations between primary resources and their alternatives
\r
798 $sql = "SELECT DISTINCT c.content_path, pr.resource, ";
\r
800 // ignore primary resource type if the request is on particular secondary type.
\r
801 // otherwise, if the primary resource is defined with multiple primary types,
\r
802 // the primary resource would be replaced/appended multiple times.
\r
803 if ($only_on_secondary_type == 0) {
\r
804 $sql .= "prt.type_id primary_type, ";
\r
806 $sql .= "sr.secondary_resource, srt.type_id secondary_type
\r
807 FROM ".TABLE_PREFIX."primary_resources pr, ".
\r
808 TABLE_PREFIX."primary_resources_types prt,".
\r
809 TABLE_PREFIX."secondary_resources sr,".
\r
810 TABLE_PREFIX."secondary_resources_types srt,".
\r
811 TABLE_PREFIX."content c
\r
812 WHERE pr.content_id=".$cid."
\r
813 AND pr.primary_resource_id = prt.primary_resource_id
\r
814 AND pr.primary_resource_id = sr.primary_resource_id
\r
815 AND sr.language_code='".$_SESSION['lang']."'
\r
816 AND sr.secondary_resource_id = srt.secondary_resource_id
\r
817 AND pr.content_id = c.content_id";
\r
818 if ($only_on_secondary_type > 0) {
\r
819 $sql .= " AND srt.type_id=".$only_on_secondary_type;
\r
821 $sql .= " ORDER BY pr.primary_resource_id, prt.type_id";
\r
823 $rows = $dao->execute($sql);
\r
825 if (!is_array($rows)) {
\r
829 return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);
\r
833 foreach ($rows as $row) {
\r
834 $alternative_rows[] = $row;
\r
836 $youtube_playURL = ContentUtility::convertYoutubeWatchURLToPlayURL($row['resource']);
\r
838 if ($row['resource'] <> $youtube_playURL) {
\r
839 $row['resource'] = $youtube_playURL;
\r
840 $alternative_rows[] = $row;
\r
844 foreach ($alternative_rows as $row)
\r
846 if ($info_only || $only_on_secondary_type ||
\r
847 ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_TEXT']==1 && $row['primary_type']==3 &&
\r
848 ($_SESSION['prefs']['PREF_ALT_TO_TEXT']=="audio" && $row['secondary_type']==1 ||
\r
849 $_SESSION['prefs']['PREF_ALT_TO_TEXT']=="visual" && $row['secondary_type']==4 ||
\r
850 $_SESSION['prefs']['PREF_ALT_TO_TEXT']=="sign_lang" && $row['secondary_type']==2)) ||
\r
852 ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_AUDIO']==1 && $row['primary_type']==1 &&
\r
853 ($_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="visual" && $row['secondary_type']==4 ||
\r
854 $_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="text" && $row['secondary_type']==3 ||
\r
855 $_SESSION['prefs']['PREF_ALT_TO_AUDIO']=="sign_lang" && $row['secondary_type']==2)) ||
\r
857 ($_SESSION['prefs']['PREF_USE_ALTERNATIVE_TO_VISUAL']==1 && $row['primary_type']==4 &&
\r
858 ($_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="audio" && $row['secondary_type']==1 ||
\r
859 $_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="text" && $row['secondary_type']==3 ||
\r
860 $_SESSION['prefs']['PREF_ALT_TO_VISUAL']=="sign_lang" && $row['secondary_type']==2))
\r
863 $ext = substr($row['secondary_resource'], strrpos($row['secondary_resource'], '.')+1);
\r
865 // alternative is video
\r
866 if (in_array($ext, $video_exts)|| in_array($ext, $audio_exts) ||
\r
867 preg_match("/http:\/\/.*youtube.com\/watch.*/", $row['secondary_resource'])) {
\r
868 if (in_array($ext, $audio_exts)) {
\r
869 // display audio medias in a smaller width/height (425 * 27)
\r
870 // A hack for now to handle audio media player size
\r
871 $target = '[media|'.$audio_width.'|'.$audio_height.']'.$row['secondary_resource'].'[/media]';
\r
873 // use default media size for video medias
\r
874 $target = '[media]'.$row['secondary_resource'].'[/media]';
\r
877 // a text primary to be replaced by a visual alternative
\r
878 else if (in_array($ext, $txt_exts))
\r
880 if ($row['content_path'] <> '')
\r
881 $file_location = $row['content_path'].'/'.$row['secondary_resource'];
\r
883 $file_location = $row['secondary_resource'];
\r
885 $file = TR_CONTENT_DIR.$_SESSION['course_id'] . '/'.$file_location;
\r
886 $target = '<br />'.file_get_contents($file);
\r
888 // check whether html file
\r
889 if (preg_match('/.*\<html.*\<\/html\>.*/s', $target))
\r
890 { // is a html file, use iframe to display
\r
891 // get real path to the text file
\r
892 if (defined('TR_FORCE_GET_FILE') && TR_FORCE_GET_FILE) {
\r
893 $course_base_href = 'get.php/';
\r
895 $course_base_href = 'content/' . $_SESSION['course_id'] . '/';
\r
898 $file = TR_BASE_HREF . $course_base_href.$file_location;
\r
900 $target = '<iframe width="100%" frameborder="0" class="autoHeight" scrolling="auto" src="'.$file.'"></iframe>';
\r
903 { // is a text file, insert/replace into content
\r
904 $target = nl2br($target);
\r
907 else if (in_array($ext, $image_exts))
\r
908 $target = '<img border="0" alt="'._AT('alternate_text').'" src="'.$row['secondary_resource'].'"/>';
\r
911 $target = '<p><a href="'.$row['secondary_resource'].'">'.$row['secondary_resource'].'</a></p>';
\r
913 // replace or append the target alternative to the source
\r
914 if (($row['primary_type']==3 && $_SESSION['prefs']['PREF_ALT_TO_TEXT_APPEND_OR_REPLACE'] == 'replace') ||
\r
915 ($row['primary_type']==1 && $_SESSION['prefs']['PREF_ALT_TO_AUDIO_APPEND_OR_REPLACE']=='replace') ||
\r
916 ($row['primary_type']==4 && $_SESSION['prefs']['PREF_ALT_TO_VISUAL_APPEND_OR_REPLACE']=='replace'))
\r
917 $pattern_replace_to = '${1}'."\n".$target."\n".'${3}';
\r
919 $pattern_replace_to = '${1}${2}'."<br /><br />\n".$target."\n".'${3}';
\r
921 // *** Alternative replace/append starts from here ***
\r
922 $processed = false; // one primary resource is only processed once
\r
924 // append/replace target alternative to [media]source[/media]
\r
925 if (!$processed && preg_match("/".preg_quote("[media").".*".preg_quote("]".$row['resource']."[/media]", "/")."/sU", $content))
\r
929 $content = preg_replace("/(.*)(".preg_quote("[media").".*".preg_quote("]".$row['resource']."[/media]", "/").")(.*)/sU",
\r
930 $pattern_replace_to, $content);
\r
932 if ($row['secondary_type'] == 1) $has_audio_alternative = true;
\r
933 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;
\r
934 if ($row['secondary_type'] == 3) $has_text_alternative = true;
\r
935 if ($row['secondary_type'] == 4) $has_visual_alternative = true;
\r
939 // append/replace target alternative to <img ... src="source" ...></a>
\r
940 if (!$processed && preg_match("/\<img.*src=\"".preg_quote($row['resource'], "/")."\".*\/\>/sU", $content))
\r
944 $content = preg_replace("/(.*)(\<img.*src=\"".preg_quote($row['resource'], "/")."\".*\/\>)(.*)/sU",
\r
945 $pattern_replace_to, $content);
\r
947 if ($row['secondary_type'] == 1) $has_audio_alternative = true;
\r
948 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;
\r
949 if ($row['secondary_type'] == 3) $has_text_alternative = true;
\r
950 if ($row['secondary_type'] == 4) $has_visual_alternative = true;
\r
954 // append/replace target alternative to <object ... source ...></object>
\r
955 if (!$processed && preg_match("/\<object.*".preg_quote($row['resource'], "/").".*\<\/object\>/sU", $content))
\r
959 $content = preg_replace("/(.*)(\<object.*".preg_quote($row['resource'], "/").".*\<\/object\>)(.*)/sU",
\r
960 $pattern_replace_to, $content);
\r
962 if ($row['secondary_type'] == 1) $has_audio_alternative = true;
\r
963 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;
\r
964 if ($row['secondary_type'] == 3) $has_text_alternative = true;
\r
965 if ($row['secondary_type'] == 4) $has_visual_alternative = true;
\r
969 // append/replace target alternative to <a>...source...</a> or <a ...source...>...</a>
\r
970 // skip this "if" when the source object has been processed in aboved <img> tag
\r
971 if (!$processed && preg_match("/\<a.*".preg_quote($row['resource'], "/").".*\<\/a\>/sU", $content))
\r
975 $content = preg_replace("/(.*)(\<a.*".preg_quote($row['resource'], "/").".*\<\/a\>)(.*)/sU",
\r
976 $pattern_replace_to, $content);
\r
978 if ($row['secondary_type'] == 1) $has_audio_alternative = true;
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979 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;
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980 if ($row['secondary_type'] == 3) $has_text_alternative = true;
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981 if ($row['secondary_type'] == 4) $has_visual_alternative = true;
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985 // append/replace target alternative to <embed ... source ...>
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986 if (!$processed && preg_match("/\<embed.*".preg_quote($row['resource'], "/").".*\>/sU", $content))
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990 $content = preg_replace("/(.*)(\<embed.*".preg_quote($row['resource'], "/").".*\>)(.*)/sU",
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991 $pattern_replace_to, $content);
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993 if ($row['secondary_type'] == 1) $has_audio_alternative = true;
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994 if ($row['secondary_type'] == 2) $has_sign_lang_alternative = true;
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995 if ($row['secondary_type'] == 3) $has_text_alternative = true;
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996 if ($row['secondary_type'] == 4) $has_visual_alternative = true;
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1002 if (!$info_only) {
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1005 return array($has_text_alternative, $has_audio_alternative, $has_visual_alternative, $has_sign_lang_alternative);
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1010 * This function save the last content_id accessed by current user on a course into db and set $_SESSION['s_cid']
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1012 * @param: $content_id
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1013 * @return: save $content_id, the last visited one of the current user, into db and session
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1015 public static function saveLastCid($content_id)
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1017 global $_course_id;
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1019 if (!$content_id || !isset($_SESSION['user_id'])) return;
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1021 include_once(TR_INCLUDE_PATH.'classes/DAO/UserCoursesDAO.class.php');
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1023 $userCoursesDAO = new UserCoursesDAO();
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1024 if ($userCoursesDAO->isExist($_SESSION['user_id'], $_course_id))
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1026 $userCoursesDAO->UpdateLastCid($_SESSION['user_id'], $_course_id, $content_id);
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1027 $_SESSION['s_cid'] = $content_id;
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projects / acontent.git / blob