156 lines
5 KiB
JavaScript
156 lines
5 KiB
JavaScript
import { useEffect, useState } from 'react';
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export default function useKonamiListener() {
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const [isActive, setIsActive] = useState(false);
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useEffect(() => {
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let listener;
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if (!listener) {
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listener = new Konami(() => setIsActive(!isActive));
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}
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return () => {
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listener = null;
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};
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}, [isActive]);
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return isActive;
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}
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/* eslint-disable */
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/*
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* Konami-JS ~
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* :: Now with support for touch events and multiple instances for
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* :: those situations that call for multiple easter eggs!
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* Code: https://github.com/snaptortoise/konami-js
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* Copyright (c) 2009 George Mandis (georgemandis.com, snaptortoise.com)
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* Version: 1.6.2 (7/17/2018)
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* Licensed under the MIT License (http://opensource.org/licenses/MIT)
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* Tested in: Safari 4+, Google Chrome 4+, Firefox 3+, IE7+, Mobile Safari 2.2.1+ and Android
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*/
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var Konami = function(callback) {
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var konami = {
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addEvent: function(obj, type, fn, ref_obj) {
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if (obj.addEventListener) obj.addEventListener(type, fn, false);
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else if (obj.attachEvent) {
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// IE
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obj['e' + type + fn] = fn;
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obj[type + fn] = function() {
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obj['e' + type + fn](window.event, ref_obj);
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};
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obj.attachEvent('on' + type, obj[type + fn]);
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}
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},
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removeEvent: function(obj, eventName, eventCallback) {
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if (obj.removeEventListener) {
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obj.removeEventListener(eventName, eventCallback);
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} else if (obj.attachEvent) {
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obj.detachEvent(eventName);
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}
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},
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input: '',
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pattern: '38384040373937396665',
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keydownHandler: function(e, ref_obj) {
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if (ref_obj) {
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konami = ref_obj;
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} // IE
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konami.input += e ? e.keyCode : event.keyCode;
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if (konami.input.length > konami.pattern.length) {
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konami.input = konami.input.substr(konami.input.length - konami.pattern.length);
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}
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if (konami.input === konami.pattern) {
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konami.code(konami._currentLink);
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konami.input = '';
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e.preventDefault();
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return false;
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}
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},
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load: function(link) {
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this._currentLink = link;
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this.addEvent(document, 'keydown', this.keydownHandler, this);
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this.iphone.load(link);
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},
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unload: function() {
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this.removeEvent(document, 'keydown', this.keydownHandler);
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this.iphone.unload();
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},
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code: function(link) {
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window.location = link;
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},
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iphone: {
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start_x: 0,
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start_y: 0,
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stop_x: 0,
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stop_y: 0,
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tap: false,
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capture: false,
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orig_keys: '',
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keys: ['UP', 'UP', 'DOWN', 'DOWN', 'LEFT', 'RIGHT', 'LEFT', 'RIGHT', 'TAP', 'TAP'],
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input: [],
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code: function(link) {
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konami.code(link);
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},
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touchmoveHandler: function(e) {
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if (e.touches.length === 1 && konami.iphone.capture === true) {
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var touch = e.touches[0];
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konami.iphone.stop_x = touch.pageX;
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konami.iphone.stop_y = touch.pageY;
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konami.iphone.tap = false;
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konami.iphone.capture = false;
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konami.iphone.check_direction();
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}
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},
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touchendHandler: function() {
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konami.iphone.input.push(konami.iphone.check_direction());
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if (konami.iphone.input.length > konami.iphone.keys.length) konami.iphone.input.shift();
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if (konami.iphone.input.length === konami.iphone.keys.length) {
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var match = true;
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for (var i = 0; i < konami.iphone.keys.length; i++) {
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if (konami.iphone.input[i] !== konami.iphone.keys[i]) {
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match = false;
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}
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}
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if (match) {
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konami.iphone.code(konami._currentLink);
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}
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}
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},
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touchstartHandler: function(e) {
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konami.iphone.start_x = e.changedTouches[0].pageX;
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konami.iphone.start_y = e.changedTouches[0].pageY;
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konami.iphone.tap = true;
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konami.iphone.capture = true;
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},
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load: function(link) {
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this.orig_keys = this.keys;
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konami.addEvent(document, 'touchmove', this.touchmoveHandler);
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konami.addEvent(document, 'touchend', this.touchendHandler, false);
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konami.addEvent(document, 'touchstart', this.touchstartHandler);
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},
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unload: function() {
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konami.removeEvent(document, 'touchmove', this.touchmoveHandler);
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konami.removeEvent(document, 'touchend', this.touchendHandler);
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konami.removeEvent(document, 'touchstart', this.touchstartHandler);
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},
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check_direction: function() {
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var x_magnitude = Math.abs(this.start_x - this.stop_x);
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var y_magnitude = Math.abs(this.start_y - this.stop_y);
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var x = this.start_x - this.stop_x < 0 ? 'RIGHT' : 'LEFT';
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var y = this.start_y - this.stop_y < 0 ? 'DOWN' : 'UP';
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var result = x_magnitude > y_magnitude ? x : y;
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result = this.tap === true ? 'TAP' : result;
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return result;
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},
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},
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};
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typeof callback === 'string' && konami.load(callback);
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if (typeof callback === 'function') {
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konami.code = callback;
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konami.load();
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}
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return konami;
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};
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/* eslint-enable */
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