konami.js

/*
 * Konami-JS ~ 
 * :: Now with support for touch events and multiple instances for 
 * :: those situations that call for multiple easter eggs!
 * Code: http://konami-js.googlecode.com/
 * Examples: http://www.snaptortoise.com/konami-js
 * Copyright (c) 2009 George Mandis (georgemandis.com, snaptortoise.com)
 * Version: 1.4.2 (9/2/2013)
 * Licensed under the MIT License (http://opensource.org/licenses/MIT)
 * Tested in: Safari 4+, Google Chrome 4+, Firefox 3+, IE7+, Mobile Safari 2.2.1 and Dolphin Browser
 */

var Konami = function (callback) {
  var konami = {
    addEvent: function (obj, type, fn, ref_obj) {
      if (obj.addEventListener)
        obj.addEventListener(type, fn, false);
      else if (obj.attachEvent) {
        // IE
        obj["e" + type + fn] = fn;
        obj[type + fn] = function () {
          obj["e" + type + fn](window.event, ref_obj);
        }
        obj.attachEvent("on" + type, obj[type + fn]);
      }
    },
    input: "",
    pattern: "38384040373937396665",
    load: function (link) {
      this.addEvent(document, "keydown", function (e, ref_obj) {
        if (ref_obj) konami = ref_obj; // IE
        konami.input += e ? e.keyCode : event.keyCode;
        if (konami.input.length > konami.pattern.length)
          konami.input = konami.input.substr((konami.input.length - konami.pattern.length));
        if (konami.input == konami.pattern) {
          konami.code(link);
          konami.input = "";
          e.preventDefault();
          return false;
        }
      }, this);
      this.iphone.load(link);
    },
    code: function (link) {
      window.location = link
    },
    iphone: {
      start_x: 0,
      start_y: 0,
      stop_x: 0,
      stop_y: 0,
      tap: false,
      capture: false,
      orig_keys: "",
      keys: ["UP", "UP", "DOWN", "DOWN", "LEFT", "RIGHT", "LEFT", "RIGHT", "TAP", "TAP"],
      code: function (link) {
        konami.code(link);
      },
      load: function (link) {
        this.orig_keys = this.keys;
        konami.addEvent(document, "touchmove", function (e) {
          if (e.touches.length == 1 && konami.iphone.capture == true) {
            var touch = e.touches[0];
            konami.iphone.stop_x = touch.pageX;
            konami.iphone.stop_y = touch.pageY;
            konami.iphone.tap = false;
            konami.iphone.capture = false;
            konami.iphone.check_direction();
          }
        });
        konami.addEvent(document, "touchend", function (evt) {
          if (konami.iphone.tap == true) konami.iphone.check_direction(link);
        }, false);
        konami.addEvent(document, "touchstart", function (evt) {
          konami.iphone.start_x = evt.changedTouches[0].pageX;
          konami.iphone.start_y = evt.changedTouches[0].pageY;
          konami.iphone.tap = true;
          konami.iphone.capture = true;
        });
      },
      check_direction: function (link) {
        x_magnitude = Math.abs(this.start_x - this.stop_x);
        y_magnitude = Math.abs(this.start_y - this.stop_y);
        x = ((this.start_x - this.stop_x) < 0) ? "RIGHT" : "LEFT";
        y = ((this.start_y - this.stop_y) < 0) ? "DOWN" : "UP";
        result = (x_magnitude > y_magnitude) ? x : y;
        result = (this.tap == true) ? "TAP" : result;

        if (result == this.keys[0]) this.keys = this.keys.slice(1, this.keys.length);
        if (this.keys.length == 0) {
          this.keys = this.orig_keys;
          this.code(link);
        }
      }
    }
  }

  typeof callback === "string" && konami.load(callback);
  if (typeof callback === "function") {
    konami.code = callback;
    konami.load();
  }

  return konami;
};