muddle/templates/config_lock.js

   1 var lock = false;
   2 var timeout = undefined;
   3 var active = true;
   4 var lock_interval = undefined;
   5
   6 function start_activity_tracking(){
   7     timeout = setTimeout(timed_out,30000)
   8     $('body')
   9         .mousemove(activity)
  10         .keypress(activity);
  11 }
  12
  13 function activity(){
  14     /*
  15         called whenever activity is detected.  This function will prevent
  16         the time_out function from being called
  17     */
  18     if (timeout!=undefined) {
  19         clearTimeout(timeout);
  20     }
  21     timeout = setTimeout(timed_out,180000)
  22 }
  23
  24 function timed_out(){
  25     /*
  26         called when the owner of the lock times out
  27     */
  28     clearTimeout(lock_interval);
  29     $('body')
  30         .unbind('mousemove',activity)
  31         .unbind('keypress',activity)
  32         .mousemove(reacquire_lock)
  33         .keypress(reacquire_lock);
  34     $errors.empty().append('<li>Your lock has timed out due to inactivity.  If you become active again it will automatically be reacquired if the page is not in use by another user.</li>')
  35     $errors.show();
  36     lock = false;
  37     active = false;
  38 }
  39
  40 function reacquire_lock() {
  41     /*
  42         called when a timed out user tries to reacquire the lock
  43     */
  44     if (!active){
  45         active = true
  46         $('body')
  47             .unbind('mousemove',reacquire_lock)
  48             .unbind('keypress',reacquire_lock);
  49         refresh_lock();
  50     }
  51 }
  52
  53 function acquire_lock() {
  54     /*
  55         called by users wishing to obtain the lock.  The result of this method
  56         may be cached.
  57     */
  58     $.get('{{ROOT}}/plugin/lock/acquire', {}, process_lock);
  59 }
  60
  61 function refresh_lock() {
  62     /*
  63         called by owner of lock to maintain possession
  64     */
  65     $.get('{{ROOT}}/plugin/lock/refresh', {}, process_lock);
  66 }
  67
  68 function process_lock(data){
  69     /*
  70         processes response about lock possession
  71     */
  72     if (active){
  73         if (data == 1){
  74             if (!lock){
  75                 // only hide on lock acquire, otherwise you could hide an important error
  76                 start_activity_tracking()
  77                 $errors.hide();
  78                 lock = true;
  79             }
  80             lock_interval = setTimeout(refresh_lock, 10000);
  81         } else {
  82             $errors.empty().append('<li>You do not hold the lock.  You cannot edit configuration until $USER is finished.<br/>  Page will unlock when lock is acquired.</li>')
  83             $errors.show();
  84             lock = false;
  85             setTimeout(acquire_lock, 10000);
  86         }
  87     }
  88 }