1 files changed, 99 insertions, 0 deletions
diff --git a/lib/scripts/locktimer.js b/lib/scripts/locktimer.js
new file mode 100644
index 000000000..f5ba1c60d
--- /dev/null
+++ b/lib/scripts/locktimer.js
@@ -0,0 +1,99 @@
+/**
+ * Class managing the timer to display a warning on a expiring lock
+ */
+var locktimer = {
+    sack:     null,
+    timeout:  0,
+    timerID:  null,
+    lasttime: null,
+    msg:      '',
+    pageid:   '',
+
+    init: function(timeout,msg,draft){
+        // init values
+        locktimer.timeout  = timeout*1000;
+        locktimer.msg      = msg;
+        locktimer.draft    = draft;
+        locktimer.lasttime = new Date();
+
+        if(!$('dw__editform')) return;
+        locktimer.pageid = $('dw__editform').elements.id.value;
+        if(!locktimer.pageid) return;
+        if($('wiki__text').readOnly) return;
+
+        // init ajax component
+        locktimer.sack = new sack(DOKU_BASE + 'lib/exe/ajax.php');
+        locktimer.sack.AjaxFailedAlert = '';
+        locktimer.sack.encodeURIString = false;
+        locktimer.sack.onCompletion = locktimer.refreshed;
+
+        // register refresh event
+        addEvent($('dw__editform'),'keypress',function(){locktimer.refresh();});
+        // start timer
+        locktimer.reset();
+    },
+
+    /**
+     * (Re)start the warning timer
+     */
+    reset: function(){
+        locktimer.clear();
+        locktimer.timerID = window.setTimeout("locktimer.warning()", locktimer.timeout);
+    },
+
+    /**
+     * Display the warning about the expiring lock
+     */
+    warning: function(){
+        locktimer.clear();
+        alert(locktimer.msg);
+    },
+
+    /**
+     * Remove the current warning timer
+     */
+    clear: function(){
+        if(locktimer.timerID !== null){
+            window.clearTimeout(locktimer.timerID);
+            locktimer.timerID = null;
+        }
+    },
+
+    /**
+     * Refresh the lock via AJAX
+     *
+     * Called on keypresses in the edit area
+     */
+    refresh: function(){
+        var now = new Date();
+        // refresh every minute only
+        if(now.getTime() - locktimer.lasttime.getTime() > 30*1000){
+            var params = 'call=lock&id='+encodeURIComponent(locktimer.pageid);
+            var dwform = $('dw__editform');
+            if(locktimer.draft && dwform.elements.wikitext){
+                params += '&prefix='+encodeURIComponent(dwform.elements.prefix.value);
+                params += '&wikitext='+encodeURIComponent(dwform.elements.wikitext.value);
+                params += '&suffix='+encodeURIComponent(dwform.elements.suffix.value);
+                if(dwform.elements.date){
+                    params += '&date='+encodeURIComponent(dwform.elements.date.value);
+                }
+            }
+            locktimer.sack.runAJAX(params);
+            locktimer.lasttime = now;
+        }
+    },
+
+    /**
+     * Callback. Resets the warning timer
+     */
+    refreshed: function(){
+        var data  = this.response;
+        var error = data.charAt(0);
+            data  = data.substring(1);
+
+        $('draft__status').innerHTML=data;
+        if(error != '1') return; // locking failed
+        locktimer.reset();
+    }
+};
+