-
-
Save shamansir/5949621 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// simple observer (pubsub) implementation | |
define(["underscore", "base/classex", "util/logging"], function(_, Class, Logging) { | |
var PubSub = Class.extend({}); | |
PubSub._topics = function() { | |
if (!window.pubsub) { | |
window.pubsub = {}; | |
} | |
return window.pubsub; | |
}; | |
PubSub.subscribe = function (topic, callback) { | |
var topics = PubSub._topics(); | |
if (!topics[topic]) { | |
topics[topic] = []; | |
} | |
var pair = [callback]; | |
if (arguments.length == 3) { | |
// context? | |
pair.push(arguments[2]); | |
} | |
topics[topic].push(pair); | |
return [topic, callback]; | |
}; | |
PubSub.unsubscribe = function (handle) { | |
var topic = handle[0]; | |
var topics = PubSub._topics(); | |
topics[topic] && _.each(topics[topic], function (l, i) { | |
if (l[0] === handle[1]) { | |
topics[topic].splice(i, 1); | |
} | |
}); | |
}; | |
PubSub.publish = function (topic) { | |
var args = _.map(arguments,function (arg) { return arg; }); | |
args.shift(); | |
var topics = PubSub._topics(); | |
_.each(topics[topic], function (l) { | |
l[0].apply(l.length == 2 ? l[1] : PubSub, args); | |
}); | |
}; | |
return PubSub; | |
}); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment