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   1  <?php  // $Id: users.php,v 1.13.2.3 2008/06/18 03:13:40 dongsheng Exp $
   2  
   3      $nomoodlecookie = true;     // Session not needed!
   4  
   5      include('../../../config.php');
   6      include ('../lib.php');
   7  
   8      $chat_sid   = required_param('chat_sid', PARAM_ALPHANUM);
   9      $beep       = optional_param('beep', 0, PARAM_INT);  // beep target
  10  
  11      if (!$chatuser = get_record('chat_users', 'sid', $chat_sid)) {
  12          error('Not logged in!');
  13      }
  14  
  15      //Get the minimal course
  16      if (!$course = get_record('course','id',$chatuser->course,'','','','','id,theme,lang')) {
  17          error('incorrect course id');
  18      }
  19  
  20      //Get the user theme and enough info to be used in chat_format_message() which passes it along to
  21      if (!$USER = get_record('user','id',$chatuser->userid)) { // no optimisation here, it would break again in future!
  22          error('User does not exist!');
  23      }
  24      $USER->description = '';
  25  
  26      //Setup course, lang and theme
  27      course_setup($course);
  28  
  29      $courseid = $chatuser->course;
  30  
  31      if (!$cm = get_coursemodule_from_instance('chat', $chatuser->chatid, $courseid)) {
  32          error('Course Module ID was incorrect');
  33      }
  34  
  35      if ($beep) {
  36          $message->chatid    = $chatuser->chatid;
  37          $message->userid    = $chatuser->userid;
  38          $message->groupid   = $chatuser->groupid;
  39          $message->message   = "beep $beep";
  40          $message->system    = 0;
  41          $message->timestamp = time();
  42  
  43          if (!insert_record('chat_messages', $message)) {
  44              error('Could not insert a chat message!');
  45          }
  46  
  47          $chatuser->lastmessageping = time();          // A beep is a ping  ;-)
  48      }
  49  
  50      $chatuser->lastping = time();
  51      set_field('chat_users', 'lastping', $chatuser->lastping, 'id', $chatuser->id  );
  52  
  53      $refreshurl = "users.php?chat_sid=$chat_sid";
  54  
  55      /// Get list of users
  56  
  57      if (!$chatusers = chat_get_users($chatuser->chatid, $chatuser->groupid, $cm->groupingid)) {
  58          print_error('errornousers', 'chat');
  59      }
  60  
  61      ob_start();
  62      ?>
  63      <script type="text/javascript">
  64      //<![CDATA[
  65      var timer = null
  66      var f = 1; //seconds
  67      var uidles = new Array(<?php echo count($chatusers) ?>);
  68      <?php
  69          $i = 0;
  70          foreach ($chatusers as $chatuser) {
  71              echo "uidles[$i] = 'uidle{$chatuser->id}';\n";
  72              $i++;
  73          }
  74      ?>
  75  
  76      function stop() {
  77          clearTimeout(timer)
  78      }
  79  
  80      function start() {
  81          timer = setTimeout("update()", f*1000);
  82      }
  83  
  84      function update() {
  85          for(i=0; i<uidles.length; i++) {
  86              el = document.getElementById(uidles[i]);
  87              if (el != null) {
  88                  parts = el.innerHTML.split(":");
  89                  time = f + (parseInt(parts[0], 10)*60) + parseInt(parts[1], 10);
  90                  min = Math.floor(time/60);
  91                  sec = time % 60;
  92                  el.innerHTML = ((min < 10) ? "0" : "") + min + ":" + ((sec < 10) ? "0" : "") + sec;
  93              }
  94          }
  95          timer = setTimeout("update()", f*1000);
  96      }
  97      //]]>
  98      </script>
  99      <?php
 100  
 101  
 102      /// Print headers
 103      $meta = ob_get_clean();
 104  
 105  
 106      // Use ob to support Keep-Alive
 107      ob_start();
 108      print_header('', '', '', '', $meta, false, '', '', false, 'onload="start()" onunload="stop()"');
 109  
 110  
 111      /// Print user panel body
 112      $timenow    = time();
 113      $stridle    = get_string('idle', 'chat');
 114      $strbeep    = get_string('beep', 'chat');
 115  
 116  
 117      echo '<div style="display: none"><a href="'.$refreshurl.'" id="refreshLink">Refresh link</a></div>';
 118      echo '<table width="100%">';
 119      foreach ($chatusers as $chatuser) {
 120          $lastping = $timenow - $chatuser->lastmessageping;
 121          $min = (int) ($lastping/60);
 122          $sec = $lastping - ($min*60);
 123          $min = $min < 10 ? '0'.$min : $min;
 124          $sec = $sec < 10 ? '0'.$sec : $sec;
 125          $idle = $min.':'.$sec;
 126          echo '<tr><td width="35">';
 127          echo "<a target=\"_blank\" onClick=\"return openpopup('/user/view.php?id=$chatuser->id&amp;course=$courseid','user$chatuser->id','');\" href=\"$CFG->wwwroot/user/view.php?id=$chatuser->id&amp;course=$courseid\">";
 128          print_user_picture($chatuser->id, 0, $chatuser->picture, false, false, false);
 129          echo '</a></td><td valign="center">';
 130          echo '<p><font size="1">';
 131          echo fullname($chatuser).'<br />';
 132          echo "<span class=\"dimmed_text\">$stridle <span name=\"uidles\" id=\"uidle{$chatuser->id}\">$idle</span></span>";
 133          echo " <a href=\"users.php?chat_sid=$chat_sid&amp;beep=$chatuser->id\">$strbeep</a>";
 134          echo '</font></p>';
 135          echo '</td></tr>';
 136      }
 137      // added 2 </div>s, xhtml strict complaints
 138      echo '</table>';
 139      print_footer('empty');
 140  
 141      //
 142      // Support HTTP Keep-Alive by printing Content-Length
 143      //
 144      // If the user pane is refreshing often, using keepalives 
 145      // is lighter on the server and faster for most clients. 
 146      //
 147      // Apache is normally configured to have a 15s timeout on 
 148      // keepalives, so let's observe that. Unfortunately, we cannot
 149      // autodetect the keepalive timeout. 
 150      //
 151      // Using keepalives when the refresh is longer than the timeout
 152      // wastes server resources keeping an apache child around on a  
 153      // connection that will timeout. So we don't. 
 154      if ($CFG->chat_refresh_userlist < 15) {    
 155          header("Content-Length: " . ob_get_length() );
 156          ob_end_flush(); 
 157      }
 158  
 159      exit; // no further output
 160  
 161  
 162  ?>