$.ev

John Beppu · John Beppu · commit d7160eb45841 · 2008-09-06T21:02:19.000-07:00
diff --git a/jquery.ev.js b/jquery.ev.js
@@ -0,0 +1,62 @@
+(function($){
+
+  $.ev = $.ev || {
+
+    handlers : {},
+    running  : false,
+    xhr      : null,
+
+    log: function() {
+      if (console) console.log(arguments);
+    },
+
+    run: function(events) {
+      var i;
+      for (i = 0; i < events.length; i++) {
+        var e = events[i];
+        if (!e) continue;
+        var h = this.handlers[e.type];
+        if (h) h(e);
+      }
+    },
+
+    stop: function() {
+      this.running = false;
+      if (this.xhr) {
+        this.xhr.abort();
+        this.xhr = null;
+      }
+      // Maybe it should let the server side know that it stopped listening.
+    },
+
+    loop: function(url, channels) {
+      var self = this;
+      this.running = true;
+      if (!channels) channels = [];
+      this.xhr = $.ajax({
+        type     : 'GET',
+        dataType : 'json',
+        url      : url,
+        data     : { channels: channels },
+        success  : function(events, status) {
+          self.log('success', events);
+          self.run(events)
+        },
+        complete : function(xhr, status) {
+          var delay;
+          if (status == 'success') {
+            delay = 100;
+          } else {
+            self.log('status: ' + status, '; waiting before long-polling again...');
+            delay = 5000;
+          }
+          window.setTimeout(function(){ 
+            if (self.running) self.loop(url, channels);
+          }, delay);
+        }
+      });
+    }
+
+  };
+
+})(jQuery);
