lib/js/cometio.js in sinatra-cometio-0.0.7 vs lib/js/cometio.js in sinatra-cometio-0.0.8

@@ -54,24 +54,33 @@
       }
     );
   };
 
   this.events = new Array();
-  this.on = function(type, listener){
+  this.on = function(type, listener, opts){
     if(typeof listener !== "function") return;
     var event_id = self.events.length > 0 ? 1 + self.events[self.events.length-1].id : 0
-    self.events.push({
+    var params = {
       id: event_id,
       type: type,
       listener: listener
-    });
+    };
+    for(i in opts){
+      if(!params[i]) params[i] = opts[i];
+    };
+    self.events.push(params);
     return event_id;
   };
 
+  this.once = function(type, listener){
+    this.on(type, listener, {once: true});
+  };
+
   this.emit = function(type, data){
     for(var i = 0; i < self.events.length; i++){
       var e = self.events[i];
       if(e.type == type) e.listener(data);
+      if(e.once) this.removeListener(e.id);
     }
   };
 
   this.removeListener = function(id_or_type){
     for(var i = self.events.length-1; i >= 0; i--){