Publish Nerbus source snapshot and build documentation

lib/ratelimit.js

@@ -0,0 +1,52 @@
+// Initialize the rate limiting class from Matteo Agosti via https://www.matteoagosti.com/blog/2013/01/22/rate-limiting-function-calls-in-javascript/
+var RateLimit = (function() {
+  var RateLimit = function(maxOps, interval, allowBursts) {
+    this._maxRate = allowBursts ? maxOps : maxOps / interval;
+    this._interval = interval;
+    this._allowBursts = allowBursts;
+
+    this._numOps = 0;
+    this._start = new Date().getTime();
+    this._queue = [];
+  };
+
+  RateLimit.prototype.schedule = function(fn) {
+    var that = this,
+        rate = 0,
+        now = new Date().getTime(),
+        elapsed = now - this._start;
+
+    if (elapsed > this._interval) {
+      this._numOps = 0;
+      this._start = now;
+    }
+
+    rate = this._numOps / (this._allowBursts ? 1 : elapsed);
+
+    if (rate < this._maxRate) {
+      if (this._queue.length === 0) {
+        this._numOps++;
+        fn();
+      } else {
+        if (fn)
+          this._queue.push(fn);
+
+        this._numOps++;
+        this._queue.shift()();
+      }
+    } else {
+      if (fn)
+        this._queue.push(fn);
+
+      setTimeout(function() {
+        that.schedule();
+      }, 1 / this._maxRate);
+    }
+  };
+
+  return RateLimit;
+})();
+
+module.exports = {
+  RateLimit: RateLimit
+};