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var pubsub = {};
(function(q) {
var topics = {}, subUid = -1;
q.subscribe = function(topic, func) {
if (!topics[topic]) {
topics[topic] = [];
}
var token = (++subUid).toString();
topics[topic].push({
token: token,
func: func
});
return token;
};
q.publish = function(topic, args) {
if (!topics[topic]) {
return false;
}
setTimeout(function() {
var subscribers = topics[topic],
len = subscribers ? subscribers.length : 0;
while (len--) {
subscribers[len].func(topic, args);
}
}, 0);
return true;
};
q.unsubscribe = function(token) {
for (var m in topics) {
if (topics[m]) {
for (var i = 0, j = topics[m].length; i < j; i++) {
if (topics[m][i].token === token) {
topics[m].splice(i, 1);
return token;
}
}
}
}
return false;
};
}(pubsub));
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