mod/hotpot/view.php

   1 <?PHP // $Id$
   2     /// This page prints a hotpot quiz
   3     if (defined('HOTPOT_FIRST_ATTEMPT') && HOTPOT_FIRST_ATTEMPT==false) {
   4         // this script is being included (by attempt.php)
   5     } else {
   6         // this script is being called directly from the browser
   7         define('HOTPOT_FIRST_ATTEMPT', true);
   8         require_once("../../config.php");
   9         require_once("lib.php");
  10
  11         $id = optional_param('id', 0, PARAM_INT); // Course Module ID, or
  12         $hp = optional_param('hp', 0, PARAM_INT); // hotpot ID
  13
  14         if ($id) {
  15             if (! $cm = get_coursemodule_from_id('hotpot', $id)) {
  16                 error("Course Module ID was incorrect");
  17             }
  18             if (! $course = get_record("course", "id", $cm->course)) {
  19                 error("Course is misconfigured");
  20             }
  21             if (! $hotpot = get_record("hotpot", "id", $cm->instance)) {
  22                 error("Course module is incorrect");
  23             }
  24
  25         } else {
  26             if (! $hotpot = get_record("hotpot", "id", $hp)) {
  27                 error("Course module is incorrect");
  28             }
  29             if (! $course = get_record("course", "id", $hotpot->course)) {
  30                 error("Course is misconfigured");
  31             }
  32             if (! $cm = get_coursemodule_from_instance("hotpot", $hotpot->id, $course->id)) {
  33                 error("Course Module ID was incorrect");
  34             }
  35
  36         }
  37         // make sure this user is enrolled in this course and can access this HotPot
  38         require_login($course);
  39         $context = get_context_instance(CONTEXT_MODULE, $cm->id);
  40         require_capability('mod/hotpot:attempt', $context, $USER->id);
  41     }
  42     // set nextpage (for error messages)
  43     $nextpage = "$CFG->wwwroot/course/view.php?id=$course->id";
  44     // header strings
  45     $title = format_string($course->shortname.': '.$hotpot->name, true);
  46     $heading = $course->fullname;
  47
  48     $navigation = build_navigation('', $cm);
  49
  50     $button = update_module_button($cm->id, $course->id, get_string("modulename", "hotpot"));
  51     $button = '<div style="font-size:0.75em;">'.$button.'</div>';
  52     $loggedinas = '<span class="logininfo">'.user_login_string($course, $USER).'</span>';
  53     $time = time();
  54     $hppassword = optional_param('hppassword', '');
  55     if (HOTPOT_FIRST_ATTEMPT && !has_capability('mod/hotpot:grade', $context)) {
  56         // check this quiz is available to this student
  57         // error message, if quiz is unavailable
  58         $error = '';
  59         // check quiz is visible
  60         if (!hotpot_is_visible($cm)) {
  61             $error = get_string("activityiscurrentlyhidden");
  62         // check network address
  63         } else if ($hotpot->subnet && !address_in_subnet(getremoteaddr(), $hotpot->subnet)) {
  64             $error = get_string("subneterror", "quiz");
  65         // check number of attempts
  66         } else if ($hotpot->attempts && $hotpot->attempts <= count_records_select('hotpot_attempts', 'hotpot='.$hotpot->id.' AND userid='.$USER->id, 'COUNT(DISTINCT clickreportid)')) {
  67             $error = get_string("nomoreattempts", "quiz");
  68         // get password
  69         } else if ($hotpot->password && empty($hppassword)) {
  70             print_header($title, $heading, $navigation, "", "", true, $button, $loggedinas, false);
  71             print_heading($hotpot->name);
  72             $boxalign = 'center';
  73             $boxwidth = 500;
  74             if (trim(strip_tags($hotpot->summary))) {
  75                 print_simple_box_start($boxalign, $boxwidth);
  76                 print '<div class="mdl-align">'.format_text($hotpot->summary)."</div>\n";
  77                 print_simple_box_end();
  78                 print "<br />\n";
  79             }
  80             print '<form id="passwordform" method="post" action="view.php?id='.$cm->id.'">'."\n";
  81             print_simple_box_start($boxalign, $boxwidth);
  82             print '<div class="mdl-align">';
  83             print get_string('requirepasswordmessage', 'quiz').'<br /><br />';
  84             print '<b>'.get_string('password').':</b> ';
  85             print '<input name="hppassword" type="password" value="" /> ';
  86             print '<input type="submit" value="'.get_string("ok").'" /> ';
  87             print "</div>\n";
  88             print_simple_box_end();
  89             print "</form>\n";
  90             print_footer();
  91             exit;
  92         // check password
  93         } else if ($hotpot->password && strcmp($hotpot->password, $hppassword)) {
  94             $error = get_string("passworderror", "quiz");
  95             $nextpage = "view.php?id=$cm->id";
  96         // check quiz is open
  97         } else if ($hotpot->timeopen && $hotpot->timeopen > $time) {
  98             $error = get_string("quiznotavailable", "quiz", userdate($hotpot->timeopen))."<br />\n";
  99         // check quiz is not closed
 100         } else if ($hotpot->timeclose && $hotpot->timeclose < $time) {
 101             $error = get_string("quizclosed", "quiz", userdate($hotpot->timeclose))."<br />\n";
 102         }
 103         if ($error) {
 104             print_header($title, $heading, $navigation, "", "", true, $button, $loggedinas, false);
 105             notice($error, $nextpage);
 106             //
 107             // script stops here, if quiz is unavailable to student
 108             //
 109         }
 110     }
 111     $available_msg = '';
 112     if (!empty($hotpot->timeclose) && $hotpot->timeclose > $time) {
 113         // quiz is available until 'timeclose'
 114         $available_msg = get_string("quizavailable", "quiz", userdate($hotpot->timeclose))."<br />\n";
 115     }
 116     // open and parse the source file
 117     if(!$hp = new hotpot_xml_quiz($hotpot)) {
 118         error("Quiz is unavailable at the moment");
 119     }
 120     $get_js = optional_param('js', '', PARAM_ALPHA);
 121     $get_css = optional_param('css', '', PARAM_ALPHA);
 122     $framename = optional_param('framename', '', PARAM_ALPHA);
 123     // look for <frameset> (HP5 v5)
 124     $frameset = '';
 125     $frameset_tags = '';
 126     if (preg_match_all('|<frameset([^>]*)>(.*?)</frameset>|is', $hp->html, $matches)) {
 127         $last = count($matches[0])-1;
 128         $frameset = $matches[2][$last];
 129         $frameset_tags = $matches[1][$last];
 130     }
 131     // if HTML is being requested ...
 132     if (empty($get_js) && empty($get_css)) {
 133         if (empty($frameset)) {
 134             // HP v6
 135             if ($hotpot->navigation==HOTPOT_NAVIGATION_FRAME || $hotpot->navigation==HOTPOT_NAVIGATION_IFRAME) {
 136                 $get_html = ($framename=='main') ? true : false;
 137             } else {
 138                 $get_html = true;
 139             }
 140         } else {
 141             // HP5 v5
 142             $get_html = empty($framename) ? true : false;
 143         }
 144
 145         if ($get_html) {
 146
 147             if (HOTPOT_FIRST_ATTEMPT) {
 148                 add_to_log($course->id, "hotpot", "view", "view.php?id=$cm->id", "$hotpot->id", "$cm->id");
 149
 150                 $attemptid = hotpot_add_attempt($hotpot->id);
 151                 if (! is_numeric($attemptid)) {
 152                     error('Could not insert attempt record: '.$db->ErrorMsg);
 153                 }
 154             }
 155             $hp->adjust_media_urls();
 156             if (empty($frameset)) {
 157                 // HP6 v6
 158                 $targetframe = '';
 159                 switch ($hotpot->navigation) {
 160                     case HOTPOT_NAVIGATION_BUTTONS:
 161                         // do nothing (i.e. leave buttons as they are)
 162                         break;
 163                     case HOTPOT_NAVIGATION_GIVEUP:
 164                         $hp->insert_giveup_form($attemptid, '<!-- BeginTopNavButtons -->', '<!-- EndTopNavButtons -->');
 165                         break;
 166                     case HOTPOT_NAVIGATION_FRAME:
 167                     case HOTPOT_NAVIGATION_IFRAME:
 168                         if (empty($CFG->framename)) {
 169                             $targetframe = '_top';
 170                         } else {
 171                             $targetframe = $CFG->framename;
 172                         }
 173                         if ($pos = strpos($hp->html, '</body>')) {
 174                             $insert = ''
 175                                 .'<script type="text/javascript">'."\n"
 176                                 .'//<![CDATA['."\n"
 177                                 ."var obj = document.getElementsByTagName('a');\n"
 178                                 ."if (obj) {\n"
 179                                 ."      var i_max = obj.length;\n"
 180                                 ."      for (var i=0; i<i_max; i++) {\n"
 181                                 ."              if (obj[i].href && ! obj[i].target) {\n"
 182                                 ."                      obj[i].target = '$targetframe';\n"
 183                                 ."              }\n"
 184                                 ."      }\n"
 185                                 ."      var obj = null;\n"
 186                                 ."}\n"
 187                                 ."var obj = document.getElementsByTagName('form');\n"
 188                                 ."if (obj) {\n"
 189                                 ."      var i_max = obj.length;\n"
 190                                 ."      for (var i=0; i<i_max; i++) {\n"
 191                                 ."              if (obj[i].action && ! obj[i].target) {\n"
 192                                 ."                      obj[i].target = '$targetframe';\n"
 193                                 ."              }\n"
 194                                 ."      }\n"
 195                                 ."      var obj = null;\n"
 196                                 ."}\n"
 197                                 .'//]]>'."\n"
 198                                 .'</script>'."\n"
 199                             ;
 200                             $hp->html = substr_replace($hp->html, $insert, $pos, 0);
 201                         }
 202                         $hp->remove_nav_buttons();
 203                         break;
 204                     default:
 205                         $hp->remove_nav_buttons();
 206                 }
 207                 if (isset($hp->real_outputformat) && $hp->real_outputformat==HOTPOT_OUTPUTFORMAT_MOBILE) {
 208                     $hp->insert_submission_form($attemptid, '<!-- BeginSubmissionForm -->', '<!-- EndSubmissionForm -->', true);
 209                 } else {
 210                     $hp->insert_submission_form($attemptid, '<!-- BeginSubmissionForm -->', '<!-- EndSubmissionForm -->', false, $targetframe);
 211                 }
 212             } else {
 213                 // HP5 v5
 214                 switch ($hotpot->navigation) {
 215                     case HOTPOT_NAVIGATION_BUTTONS:
 216                         // convert URLs in nav buttons
 217                         break;
 218                     case HOTPOT_NAVIGATION_GIVEUP:
 219                         //  $hp->insert_giveup_form($attemptid, '<!-- BeginTopNavButtons -->', '<!-- EndTopNavButtons -->');
 220                         break;
 221                     default:
 222                         // remove navigation buttons
 223                         $hp->html = preg_replace('#NavBar\+=(.*);#', '', $hp->html);
 224                 }
 225                 $hp->insert_submission_form($attemptid, "var NavBar='", "';");
 226             }
 227         }
 228     }
 229     //FEEDBACK = new Array();
 230     //FEEDBACK[0] = ''; // url of feedback page/script
 231     //FEEDBACK[1] = ''; // array of array('teachername', 'value');
 232     //FEEDBACK[2] = ''; // 'student name' [formmail only]
 233     //FEEDBACK[3] = ''; // 'student email' [formmail only]
 234     //FEEDBACK[4] = ''; // window width
 235     //FEEDBACK[5] = ''; // window height
 236     //FEEDBACK[6] = ''; // 'Send a message to teacher' [prompt/button text]
 237     //FEEDBACK[7] = ''; // 'Title'
 238     //FEEDBACK[8] = ''; // 'Teacher'
 239     //FEEDBACK[9] = ''; // 'Message'
 240     //FEEDBACK[10] = ''; // 'Close this window'
 241     $feedback = array();
 242     switch ($hotpot->studentfeedback) {
 243         case HOTPOT_FEEDBACK_NONE:
 244             // do nothing
 245             break;
 246         case HOTPOT_FEEDBACK_WEBPAGE:
 247             if (empty($hotpot->studentfeedbackurl)) {
 248                 $hotpot->studentfeedback = HOTPOT_FEEDBACK_NONE;
 249             } else {
 250                 $feedback[0] = "'$hotpot->studentfeedbackurl'";
 251             }
 252             break;
 253         case HOTPOT_FEEDBACK_FORMMAIL:
 254             $teachers = hotpot_feedback_teachers($course, $hotpot);
 255             if (empty($teachers) || empty($hotpot->studentfeedbackurl)) {
 256                 $hotpot->studentfeedback = HOTPOT_FEEDBACK_NONE;
 257             } else {
 258                 $feedback[0] = "'$hotpot->studentfeedbackurl'";
 259                 $feedback[1] = $teachers;
 260                 $feedback[2] = "'".fullname($USER)."'";
 261                 $feedback[3] = "'".$USER->email."'";
 262                 $feedback[4] = 500; // width
 263                 $feedback[5] = 300; // height
 264             }
 265             break;
 266         case HOTPOT_FEEDBACK_MOODLEFORUM:
 267             $module = get_record('modules', 'name', 'forum');
 268             $forums = get_records('forum', 'course', "$course->id");
 269             if (empty($module) || empty($module->visible) || empty($forums)) {
 270                 $hotpot->studentfeedback = HOTPOT_FEEDBACK_NONE;
 271             } else {
 272                 $feedback[0] = "'$CFG->wwwroot/mod/forum/index.php?id=$course->id'";
 273             }
 274             break;
 275         case HOTPOT_FEEDBACK_MOODLEMESSAGING:
 276             $teachers = hotpot_feedback_teachers($course, $hotpot);
 277             if (empty($CFG->messaging) || empty($teachers)) {
 278                 $hotpot->studentfeedback = HOTPOT_FEEDBACK_NONE;
 279             } else {
 280                 $feedback[0] = "'$CFG->wwwroot/message/discussion.php?id='";
 281                 $feedback[1] = $teachers;
 282                 $feedback[4] = 400; // width
 283                 $feedback[5] = 500; // height
 284             }
 285             break;
 286         default:
 287             // do nothing
 288     }
 289     if ($hotpot->studentfeedback != HOTPOT_FEEDBACK_NONE) {
 290         $feedback[6] = "'Send a message to teacher'";
 291         $feedback[7] = "'Title'";
 292         $feedback[8] = "'Teacher'";
 293         $feedback[9] = "'Message'";
 294         $feedback[10] = "'Close this window'";
 295         $js = '';
 296         foreach ($feedback as $i=>$str) {
 297             $js .= 'FEEDBACK['.$i."] = $str;\n";
 298         }
 299         $js = '<script type="text/javascript">'."\n//<![CDATA[\n"."FEEDBACK = new Array();\n".$js."//]]>\n</script>\n";
 300         $hp->html = preg_replace('|</head>|i', "$js</head>", $hp->html, 1);
 301     }
 302     // insert hot-potatoes.js
 303     $hp->insert_script(HOTPOT_JS);
 304     // get Moodle pageid and pageclass
 305     $pageid = '';
 306     $pageclass = '';
 307     if (function_exists('page_id_and_class')) {
 308         page_id_and_class($pageid, $pageclass);
 309     }
 310     // extract first <head> tag
 311     $head = '';
 312     $pattern = '|<head([^>]*)>(.*?)</head>|is';
 313     if (preg_match($pattern, $hp->html, $matches)) {
 314         $head = $matches[2];
 315         // remove <title>
 316         $head = preg_replace('|<title[^>]*>(.*?)</title>|is', '', $head);
 317     }
 318     // extract <style> tags (and remove from $head)
 319     $styles = '';
 320     $pattern = '|<style([^>]*)>(.*?)</style>|is';
 321     if (preg_match_all($pattern, $head, $matches)) {
 322         $count = count($matches[0]);
 323         for ($i=0; $i<$count; $i++) {
 324             if ($pageid) {
 325                 $styles .= str_replace('TheBody', $pageid, $matches[0][$i])."\n";
 326             }
 327             $head = str_replace($matches[0][$i], '', $head);
 328         }
 329     }
 330     // extract <script> tags (and remove from $head)
 331     $scripts = '';
 332     $pattern = '|<script([^>]*)>(.*?)</script>|is';
 333     if (preg_match_all($pattern, $head, $matches)) {
 334         $count = count($matches[0]);
 335         for ($i=0; $i<$count; $i++) {
 336             if ($pageid) {
 337                 $scripts .= str_replace('TheBody', $pageid, $matches[0][$i])."\n";
 338             }
 339             $head = str_replace($matches[0][$i], '', $head);
 340         }
 341     }
 342     // extract <body> tags
 343     $body = '';
 344     $body_tags = '';
 345     $footer = '</html>';
 346     // HP6 and some HP5 (v6 and v4)
 347     if (preg_match('|<body'.'([^>]*'.'onLoad=(["\'])(.*?)(\\2)'.'[^>]*)'.'>(.*)</body>|is', $hp->html, $matches)) {
 348         $body = $matches[5]; // contents of first <body onload="StartUp()">...</body> block
 349         if ($pageid) {
 350             $body_tags = str_replace(' id="TheBody"', '', $matches[1]);
 351         }
 352         // workaround to ensure javascript onload routine for quiz is always executed
 353         //  $body_tags will only be inserted into the <body ...> tag
 354         //  if it is included in the theme/$CFG->theme/header.html,
 355         //  so some old or modified themes may not insert $body_tags
 356         $body .= ""
 357         .   '<script type="text/javascript">'."\n"
 358         .   "//<![CDATA[\n"
 359         .   "   var s = (typeof(window.onload)=='function') ? onload.toString() : '';\n"
 360         .   "   if (s.indexOf('".$matches[3]."')<0) {\n"
 361         .   "       if (s=='') {\n" // no previous onload
 362         .   "           window.onload = new Function('".$matches[3]."');\n"
 363         .   "       } else {\n"
 364         .   "           window.onload_hotpot = onload;\n"
 365         .   "           window.onload = new Function('window.onload_hotpot();'+'".$matches[3]."');\n"
 366         .   "       }\n"
 367         .   "    }\n"
 368         .   "//]]>\n"
 369         .   "</script>\n"
 370         ;
 371         $footer = '</body>'.$footer;
 372     } else if ($frameset) { // HP5 v5
 373         switch ($framename) {
 374             case 'top':
 375                 print_header($title, $heading, $navigation, "", "", true, $button, $loggedinas);
 376                 print $footer;
 377             break;
 378             default:
 379                 // add a HotPot navigation frame at the top of the page
 380                 //$rows = empty($CFG->resource_framesize) ? 85 : $CFG->resource_framesize;
 381                 //$frameset = "\n\t".'<frame src="view.php?id='.$cm->id.'&amp;framename=top" frameborder="0" name="top"></frame>'.$frameset;
 382                 //$frameset_tags = preg_replace('|rows="(.*?)"|', 'rows="'.$rows.',\\1"', $frameset_tags);
 383                 // put navigation into var NavBar='';
 384                 // add form to TopFrame in "WriteFeedback" function
 385                 // OR add form to BottomFrame in "DisplayExercise" function
 386                 // submission form: '<!-- BeginSubmissionForm -->', '<!-- EndSubmissionForm -->'
 387                 // give up form: '<!-- BeginTopNavButtons -->', '<!-- EndTopNavButtons -->'
 388                 print "<html>\n";
 389                 print "<head>\n<title>$title</title>\n$styles\n$scripts</head>\n";
 390                 print "<frameset$frameset_tags>$frameset</frameset>\n";
 391                 print "</html>\n";
 392             break;
 393         } // end switch $framename
 394         exit;
 395     // other files (maybe not even a HotPots)
 396     } else if (preg_match('|<body'.'([^>]*)'.'>(.*)</body>|is', $hp->html, $matches)) {
 397         $body = $matches[2];
 398         $body_tags = $matches[1];
 399     }
 400     // print the quiz to the browser
 401     if ($get_js) {
 402         print($scripts);
 403         exit;
 404     }
 405     if ($get_css) {
 406         print($styles);
 407         exit;
 408     }
 409     // closing tags for "page" and "content" divs
 410     $footer = '</div></div>'.$footer;
 411     switch ($hotpot->navigation) {
 412         case HOTPOT_NAVIGATION_BAR:
 413             //update_module_button($cm->id, $course->id, $strmodulename.'" style="font-size:0.8em')
 414             print_header(
 415                 $title, $heading, $navigation, "", $head.$styles.$scripts, true, $button, $loggedinas, false, $body_tags
 416             );
 417             if (!empty($available_msg)) {
 418                 notify($available_msg);
 419             }
 420             print $body.$footer;
 421         break;
 422         case HOTPOT_NAVIGATION_FRAME:
 423             switch ($framename) {
 424                 case 'top':
 425                     print_header($title, $heading, $navigation, "", "", true, $button, $loggedinas);
 426                     print $footer;
 427                 break;
 428                 case 'main':
 429                     if (!empty($available_msg)) {
 430                         $hp->insert_message('<!-- BeginTopNavButtons -->', $available_msg);
 431                     }
 432                     print $hp->html;
 433                 break;
 434                 default:
 435                     $txtframesetinfo = get_string('framesetinfo');
 436                     $txttoptitle     = get_string('navigation', 'hotpot');
 437                     $txtmaintitle    = get_string('modulename', 'hotpot');
 438
 439                     $rows = empty($CFG->resource_framesize) ? 85 : $CFG->resource_framesize;
 440
 441                     @header('Content-Type: text/html; charset=utf-8');
 442                     print "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Frameset//EN\" \"http://www.w3.org/TR/html4/frameset.dtd\">\n";
 443                     print "<html>\n";
 444                     print "<meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\" />\n";
 445                     print "<head><title>$title</title></head>\n";
 446                     print "<frameset rows=$rows,*>\n";
 447                     print "<frame title=\"$txttoptitle\" src=\"view.php?id=$cm->id&amp;framename=top\">\n";
 448                     print "<frame title=\"$txtmaintitle\" src=\"view.php?id=$cm->id&amp;framename=main\">\n";
 449                     print "<noframes>\n";
 450                     print "<p>$txtframesetinfo</p>\n";
 451                     print "<ul><li><a href=\"view.php?id=$cm->id&amp;framename=top\">$txttoptitle</a></li>\n";
 452                     print "<li><a href=\"view.php?id=$cm->id&amp;framename=main\">$txtmaintitle</a></li></ul>\n";
 453                     print "</noframes>\n";
 454                     print "</frameset>\n";
 455                     print "</html>\n";
 456                 break;
 457             } // end switch $framename
 458         break;
 459         case HOTPOT_NAVIGATION_IFRAME:
 460             switch ($framename) {
 461                 case 'main':
 462                     print $hp->html;
 463                 break;
 464                 default:
 465                     // set iframe attributes
 466                     $iframe_id = 'hotpot_embed_object';
 467                     $iframe_name = 'hotpot_embed_iframe';
 468                     $iframe_width = '100%';
 469                     $iframe_height = '100%';
 470                     $iframe_src = $CFG->wwwroot.'/mod/hotpot/view.php?id='.$cm->id.'&amp;framename=main';
 471                     $iframe_onload_function = 'set_embed_object_height';
 472                     $iframe_js = '<script src="'.$CFG->wwwroot.'/mod/hotpot/iframe.js" type="text/javascript"></script>'."\n";
 473
 474                     print_header(
 475                         $title, $heading, $navigation,
 476                         "", $head.$styles.$scripts.$iframe_js, true, $button,
 477                         $loggedinas, false
 478                     );
 479                     if (!empty($available_msg)) {
 480                         notify($available_msg);
 481                     }
 482
 483                     // for XHTML 1.0 Strict compatability, the embedded page should be implemented
 484                     // using an <object> not an <iframe>. However, IE <object>'s are problematic
 485                     // (links and forms cannot escape), so we use conditional comments to display
 486                     // an <iframe> in IE and an <object> in other browsers
 487
 488                     // print the html element to hold the embedded html page
 489                     // Note: the iframe in IE needs a "name" attribute for the resizing to work
 490                     print '<!--[if IE]>'."\n";
 491                     print '<iframe name="'.$iframe_name.'" id="'.$iframe_id.'" src="'.$iframe_src.'" width="'.$iframe_width.'" height="'.$iframe_height.'"></iframe>'."\n";
 492                     print '<![endif]-->'."\n";
 493                     print '<!--[if !IE]> <-->'."\n";
 494                     print '<object id="'.$iframe_id.'" type="text/html" data="'.$iframe_src.'" width="'.$iframe_width.'" height="'.$iframe_height.'"></object>'."\n";
 495                     print '<!--> <![endif]-->'."\n";
 496
 497                     // print javascript to add onload event handler - we do this here because
 498                     // an object tag should have no onload attribute in XHTML 1.0 Strict
 499                     print '<script type="text/javascript">'."\n";
 500                     print '//<![CDATA['."\n";
 501                     print "var obj = document.getElementById('$iframe_id');\n";
 502                     print "if (obj) {\n";
 503                     print "     if (obj.addEventListener) {\n";
 504                     print "             obj.addEventListener('load', $iframe_onload_function, false);\n";
 505                     print "     } else if (obj.attachEvent) {\n";
 506                     print "             obj.attachEvent('onload', $iframe_onload_function);\n";
 507                     print "     } else {\n";
 508                     print "             obj['onload'] = $iframe_onload_function;\n";
 509                     print "     }\n";
 510                     print "}\n";
 511                     print "obj = null;\n";
 512                     print '//]]>'."\n";
 513                     print '</script>'."\n";
 514
 515                     print $footer;
 516             } // end switch $framename
 517         break;
 518         case HOTPOT_NAVIGATION_GIVEUP:
 519             // replace charset , if necessary
 520             // HotPots are plain ascii (iso-8859-1) with unicode chars encoded as HTML entities
 521             $charset = get_string("thischarset");
 522             if ($charset == 'iso-8859-1') {
 523                 // do nothing
 524             } else {
 525                 $hp->html = preg_replace(
 526                     '|<meta[^>]*charset=iso-8859-1[^>]*>|is',
 527                     '<meta http-equiv="Content-Type" content="text/html; charset='.$charset.'" />',
 528                     $hp->html
 529                 );
 530             }
 531             // no break (continue to print html to browser)
 532         default:
 533             // HOTPOT_NAVIGATION_BUTTONS
 534             // HOTPOT_NAVIGATION_NONE
 535             if (!empty($available_msg)) {
 536                 $hp->insert_message('<!-- BeginTopNavButtons -->', $available_msg);
 537             }
 538             print($hp->html);
 539     }
 540 ///////////////////////////////////
 541 /// functions
 542 ///////////////////////////////////
 543 function hotpot_feedback_teachers(&$course, &$hotpot) {
 544     global $CFG;
 545     $teachers = get_users_by_capability(get_context_instance(CONTEXT_COURSE, $course->id), 'mod/hotpot:grade');
 546     $teacherdetails = '';
 547     if (!empty($teachers)) {
 548         $details = array();
 549         foreach ($teachers as $teacher) {
 550             if ($hotpot->studentfeedback==HOTPOT_FEEDBACK_MOODLEMESSAGING) {
 551                 $detail = $teacher->id;
 552             } else {
 553                 $detail =$teacher->email;
 554             }
 555             $details[] = "new Array('".fullname($teacher)."', '$detail')";
 556         }
 557         $teacherdetails = 'new Array('.implode(',', $details).");\n";
 558     }
 559     return $teacherdetails;
 560 }
 561 ?>