flack.js

flack.js

(function () {
  var root = this;

  var flack = function (limit, blackList) {
    this.blackList = typeof blackList === "undefined" ? [] : blackList;
    this.limit = typeof limit === "undefined" ? 50 : parseInt(limit);
    this.obj = {};
  };

  if (typeof exports !== "undefined") {
    if (typeof module !== "undefined" && module.exports) {
      exports = module.exports = flack;
    }
    exports.flack = flack;
  } else {
    root.flack = flack;
  }

  flack.prototype.push = function (reportedMessage) {
    reportedMessage = reportedMessage.toLowerCase();

    var arr = reportedMessage.match(/\S+/g);
    arr = arr.filter(function(item, position) {
      return arr.indexOf(item) == position;
    });

    for (var i in arr) {
      if (this.blackList.indexOf(arr[i]) != -1) {
        continue;
      }

      if (this.obj.hasOwnProperty(arr[i])) {
        this.obj[arr[i]]++;
      } else {
        this.obj[arr[i]] = 1;
      }
    }
  };

  flack.prototype.pop = function () {
    var found = false;
    var biggestKey;
    var firstFound = false;

    for (var key in this.obj) {
      if (this.obj[key] >= this.limit) {
        found = true;
        if (!firstFound) {
          biggestKey = key;
          firstFound = true;
        } else {
          if (this.obj[key] > this.obj[biggestKey]) {
            biggestKey = key;
          }
        }
      }
    }

    if (found) {
      delete this.obj[biggestKey];
      return biggestKey;
    }
  };

  flack.prototype.start = function (callback, interval) {
    if (typeof callback !== "function") {
      throw new Error("callback not a function.");
    }

    var self = this;
    this.timer = setInterval(function () {
      callback(self.pop());
    }, interval || 30000);
  };

  flack.prototype.stop = function () {
    clearInterval(this.timer);
  };

  if (typeof define === 'function' && define.amd) {
    define('flack', [], function () {
      return flack;
    });
  }
}());