added packer and build script

tools/janken/src/App.css

@@ -0,0 +1,24 @@
+.App {
+  height: 100vh;
+  width: 100vw;
+  background-image: url('./straysheep.png') ;
+  background-size: cover;
+  background-repeat: none;
+}
+
+.EnterButton {
+  display: flex;
+  height: 100%;
+  width: 100%;
+  justify-content: center;
+  align-items: center;
+}
+
+.EnterButton > button {
+  height: 50px;
+  width: 150px;
+}
+
+.HiddenExit {
+  display: none;
+}

tools/janken/src/App.test.tsx

@@ -0,0 +1,9 @@
+import React from 'react';
+import { render } from '@testing-library/react';
+import App from './App';
+
+test('renders learn react link', () => {
+  const { getByText } = render(<App />);
+  const linkElement = getByText(/learn react/i);
+  expect(linkElement).toBeInTheDocument();
+});

tools/janken/src/App.tsx

@@ -0,0 +1,167 @@
+import React, { useState } from 'react';
+import './App.css';
+import 'semantic-ui-css/semantic.min.css';
+import socketIOClient from 'socket.io-client';
+import { ILoginMessage, IJankenResult, IJankenSelect } from './model/messages';
+
+import { Button } from 'semantic-ui-react';
+
+import { Janken } from './component/janken/Janken';
+import { Stage } from './component/stage/Stage';
+
+function App(): JSX.Element {
+
+  const [socket, setSocket] = useState<SocketIOClient.Socket | null>(null);
+  const [stages, setStages] = useState<string[]>([]);
+  const [currentUser, setCurrentUser] = useState<string>('');
+  const [currentPlayers, setCurrentPlayers] = useState<ILoginMessage>({playerOne:'', playerTwo:''});
+  const [currentIndex, setCurrentIndex] = useState<number>(0);
+  const [jankenResult, setJankenResult] = useState<IJankenResult | null>(null);
+
+  const join = (): void => {
+    const wsUrl: string | undefined = process.env.REACT_APP_WEBSOCKET;
+    if (wsUrl){
+      const sock: SocketIOClient.Socket = socketIOClient(wsUrl);
+      sock.on('connect', () => {
+        if (sock.connected) {
+          console.log('接続！');
+        } else if (sock.disconnected) {
+          setSocket(null);
+          setStages([]);
+          setCurrentUser('');
+          setCurrentPlayers({playerOne:'', playerTwo:''});
+          setCurrentIndex(0);
+          setJankenResult(null);
+        } else {
+          console.log('しらんがな', sock);
+        }
+      });
+      sock.on('login', (data: ILoginMessage) => {
+        console.log(data);
+        setCurrentPlayers(data);
+      });
+      sock.on('registerUser', (data: string) => {
+        console.log(data);
+        setCurrentUser(data);
+      });
+      sock.on('jankenResult', (data: IJankenResult) => {
+        setJankenResult(data);
+      });
+      sock.on('againGame', () => {
+        setJankenResult(null);
+      });
+      sock.on('stages', (data: string[]) => {
+        setStages(data);
+        setCurrentIndex(0);
+      });
+      sock.on('updateIndex', (data: number) => {
+        setCurrentIndex(data);
+      });
+      sock.on('exitGame', () => {
+        setSocket(null);
+        setStages([]);
+        setCurrentUser('');
+        setCurrentPlayers({playerOne:'', playerTwo:''});
+        setCurrentIndex(0);
+        setJankenResult(null);
+      });
+      setSocket(sock);
+    }
+  }
+  const janken = (option: string): void => {
+    if (socket && currentUser) {
+      const message: IJankenSelect = {
+        userName: currentUser,
+        option
+      };
+      socket.emit('janken', message);
+    }
+  };
+  const moveToStage = (): void => {
+    if (socket) {
+      socket.emit('moveToStage');
+    }
+  };
+  const registerUser = (username: string): void => {
+    if (socket) {
+      socket.emit('registerUser', username);
+    }
+  };
+  const previousIndex = (): void => {
+    if (socket && currentIndex > 0) {
+      socket.emit('previousIndex');
+    }
+  };
+  const nextIndex = (): void => {
+    if (socket && currentIndex < stages.length) {
+      socket.emit('nextIndex');
+    }
+  };
+  const againGame = (): void => {
+    if (socket) {
+      socket.emit('againGame');
+    }
+  };
+  const exitGame = (): void => {
+    if (socket) {
+      socket.emit('exitGame');
+    }
+  };
+  const render = (): JSX.Element => {
+    if (socket === null) {
+      return (
+        <div className="EnterButton">
+          <Button
+            color='pink'
+            size='large'
+            onClick={join}
+          >
+            JOIN
+          </Button>
+        </div>
+      );
+    } else {
+      if (stages.length === 0) {
+        return (
+          <Janken
+            currentUser={currentUser}
+            currentPlayers={currentPlayers}
+            jankenResults={jankenResult}
+            janken={janken}
+            onSubmit={registerUser}
+            moveToStage={moveToStage}
+            againGame={againGame}
+          />
+        );
+      } else {
+        return (
+          <Stage
+            stages={stages}
+            currentIndex={currentIndex}
+            previousIndex={previousIndex}
+            nextIndex={nextIndex}
+            exitGame={exitGame}
+            />
+        );
+      }
+    }
+
+  };
+  return (
+    <div className="App">
+      {render()}
+      <div className="HiddenExit">
+          <Button
+            color='pink'
+            size='large'
+            onClick={exitGame}
+          >
+            exit
+          </Button>
+      </div>
+    </div>
+  );
+
+}
+
+export default App;

tools/janken/src/component/janken/Janken.module.scss

@@ -0,0 +1,65 @@
+.playerOne {
+  font-size: large;
+  font-weight: bold;
+  margin: 50px;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+}
+.jankenResult {
+  display:flex;
+  height: 200px;
+  width: 400px;
+  background-color: white;
+  border-radius: 20px;
+  padding: 30px;
+  margin-bottom: 40px;
+  justify-content: center;
+  align-items: center;
+}
+.playerOneName {
+  font-size: large;
+}
+.playerOneJankenResult {
+  display: relative;
+}
+
+.playerTwo {
+  font-size: large;
+  font-weight: bold;
+  margin: 50px;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+}
+.playerTwoName {
+  display: relative;
+}
+
+.playerTwoJankenResult {
+  display: relative;
+}
+
+.displayNextButton {
+  display: relative;
+}
+.displayButtons {
+  display: relative;
+}
+.loginForm {
+  width: 500px;
+}
+
+.jankenForm {
+  position: relative;
+}
+.flexCenter {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  width: 100%;
+  justify-content: center;
+  align-items: center;
+}

tools/janken/src/component/janken/Janken.tsx

@@ -0,0 +1,145 @@
+import React, { FunctionComponent, useState } from 'react';
+import { Form, Input, Label, Button, Icon } from 'semantic-ui-react';
+import { ILoginMessage, IJankenResult } from '../../model/messages';
+import style from './Janken.module.scss';
+
+type ComponentProps = {
+  currentUser: string;
+  currentPlayers: ILoginMessage;
+  jankenResults: IJankenResult | null;
+  janken: (option: string) => void;
+  onSubmit: (username: string) => void;
+  moveToStage: () => void;
+  againGame: () => void;
+};
+
+export const Janken: FunctionComponent<ComponentProps> = (props): JSX.Element => {
+  const { currentUser, currentPlayers, jankenResults, janken, onSubmit, moveToStage, againGame } = props;
+  const [userName, setUserName] = useState<string>('');
+  const getIcon = (result: string): JSX.Element | undefined => {
+    switch (result) {
+      case 'rock':
+        return (<Icon size={'huge'} name='hand rock outline' color={'pink'} />);
+      case 'paper':
+        return (<Icon size={'huge'} name='hand paper outline' color={'pink'} />);
+      case 'scissors':
+        return (<Icon size={'huge'} name='hand scissors outline' color={'pink'} />);
+      default:
+    }
+  }
+  const renderButton = (): JSX.Element => {
+    if (jankenResults && jankenResults.playerOneOption === jankenResults.playerTwoOption) {
+      return (
+      <Button
+        color='pink'
+        size='large'
+        onClick={againGame}
+      >
+        Again
+      </Button>
+      );
+    } else {
+      return (
+      <Button
+        color='pink'
+        size='large'
+        onClick={moveToStage}
+        >
+        Stages
+      </Button>
+      );
+    }
+  }
+  if (currentPlayers.playerOne === '' || currentPlayers.playerTwo === '') {
+    if (currentUser === '') {
+      return (
+        <div className={style.flexCenter}>
+          <Form className={style.loginForm}>
+            <Form.Field>
+              <Label>
+                Sheep Name
+              </Label>
+              <Input
+                value={userName}
+                loading={false}
+                onChange={(e): void => setUserName(e.target.value)}
+              />
+            </Form.Field>
+            <Button
+              onClick={(): void => onSubmit(userName)}
+            >
+              Login
+            </Button>
+          </Form>
+        </div>
+      );
+
+    }
+    return (<></>);
+
+  } else {
+    if (jankenResults === null) {
+      if (currentUser !== '') {
+        return (
+          <div className={style.flexCenter}>
+            <Form className={style.jankenForm}>
+            <Button.Group>
+              <Button
+                color='pink'
+                size='huge'
+                onClick={(): void => janken('rock')}
+              >
+                <Icon  name='hand rock outline' />
+              </Button>
+              <Button.Or />
+              <Button
+                color='pink'
+                size='huge'
+                onClick={(): void => janken('scissors')}
+              >
+              <Icon  name='hand scissors outline' />
+              </Button>
+              <Button.Or />
+              <Button
+                color='pink'
+                size='huge'
+                onClick={(): void => janken('paper')}
+              >
+              <Icon  name='hand paper outline' />
+              </Button>
+            </Button.Group>
+            </Form>
+          </div>
+        );
+
+      }
+      return (<></>);
+    } else {
+      // display result and next button
+      return (
+      <div className={style.flexCenter}>
+        <div className={style.jankenResult}>
+          <div className={style.playerOne}>
+            <div className={style.playerOneName}>
+              {jankenResults.playerOne}
+            </div>
+            <div className={style.playerOneJankenResult}>
+              {getIcon(jankenResults.playerOneOption)}
+            </div>
+          </div>
+          <div className={style.playerTwo}>
+            <div className={style.playerTwoName}>
+              {jankenResults.playerTwo}
+            </div>
+            <div className={style.playerTwoJankenResult}>
+              {getIcon(jankenResults.playerTwoOption)}
+            </div>
+          </div>
+        </div>
+        <div className={style.displayButtons}>
+          {renderButton()}
+        </div>
+      </div>);
+    }
+  }
+};

tools/janken/src/component/stage/Stage.module.scss

@@ -0,0 +1,76 @@
+.stageScreen {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  width: 100%;
+  align-items: center;
+}
+.topPage {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 100%;
+  height: 100px;
+}
+.previousButton {
+  display: flex;
+  justify-content: center;
+  width: 25%;
+}
+.stageName {
+  display: flex;
+  justify-content: center;
+  color: white;
+  font-size: x-large;
+  width: 50%;
+}
+.nextButton {
+  display: flex;
+  justify-content: center;
+  width: 25%;
+}
+.exitButton {
+  position: relative;
+}
+@mixin stageImage($url) {
+  width: 1024px;
+  height: 480px;
+  margin: 40px;
+  background-image: url($url);
+  background-size: cover;
+  float: left;
+
+}
+.cementery {
+  @include stageImage('../../static/img/01.png');
+}
+.prison {
+  @include stageImage('../../static/img/02.png');
+}
+.torture {
+  @include stageImage('../../static/img/03.png');
+}
+.inquisition {
+  @include stageImage('../../static/img/04.png');
+}
+.quadrangle {
+  @include stageImage('../../static/img/05.png');
+}
+.clock {
+  @include stageImage('../../static/img/06.png');
+}
+.spiral {
+  @include stageImage('../../static/img/07.png');
+}
+.cathedral {
+  @include stageImage('../../static/img/08.png');
+}
+.empireo {
+  @include stageImage('../../static/img/09.png');
+}
+.close {
+  @include stageImage('../../static/img/10.png');
+}
+.arrange {
+  @include stageImage('../../static/img/11.png');
+}

tools/janken/src/component/stage/Stage.tsx

@@ -0,0 +1,113 @@
+import React, { FunctionComponent } from 'react';
+import { Button } from 'semantic-ui-react';
+import style from './Stage.module.scss';
+
+type ComponentProps = {
+  stages: string[];
+  currentIndex: number;
+  previousIndex: () => void;
+  nextIndex: () => void;
+  exitGame: () => void;
+};
+
+export const Stage: FunctionComponent<ComponentProps> = (props): JSX.Element => {
+  const { stages, currentIndex, previousIndex, nextIndex, exitGame } = props;
+  const previousButton = (): JSX.Element | undefined => {
+    if (currentIndex > 0) {
+      return (
+        <Button
+          color='pink'
+          size='large'
+          onClick={previousIndex}
+        >
+          Previous
+        </Button>
+      );
+    }
+  };
+  const nextButton = (): JSX.Element | undefined => {
+    if (currentIndex < (stages.length -1)) {
+      return (
+        <Button
+          color='pink'
+          size='large'
+          onClick={nextIndex}
+        >
+          Next
+        </Button>
+      );
+    }
+  };
+  const exitButton = (): JSX.Element | undefined => {
+    if (currentIndex === (stages.length - 1)) {
+      return (
+        <Button
+          color='pink'
+          size='large'
+          onClick={exitGame}
+        >
+          Exit
+        </Button>
+      );
+    }
+  };
+  const printStageName = (): string => {
+    switch (stages[currentIndex]) {
+      case 'cementery': {
+        return 'Underground Cementery ~地下墓地~';
+      }
+      case 'prison': {
+        return 'Prison of Despair ~罪人監獄~';
+      }
+      case 'torture': {
+        return 'Torture Chamber ~拷問刑場~';
+      }
+      case 'inquisition': {
+        return 'Inquisition ~審問法廷~';
+      }
+      case 'quadrangle': {
+        return 'Quadrangle ~暴風の中庭~';
+      }
+      case 'clock': {
+        return 'Clock Tower ~時計塔~';
+      }
+      case 'spiral': {
+        return 'Spiral Corridor ~祭壇への路~';
+      }
+      case 'empireo': {
+        return 'The Empireo ~天上~';
+      }
+      case 'cathedral': {
+        return 'The Cathedral ~大聖堂~';
+      }
+      case 'close': {
+        return 'Close Encounter ~新天地~';
+      }
+      case 'arrange': {
+        return 'Arrange ~アレンジ~';
+      }
+      default:
+        return '';
+    }
+  };
+  return (
+    <div className={style.stageScreen}>
+      <div className={style.topPage}>
+        <div className={style.previousButton}>
+          {previousButton()}
+        </div>
+        <div className={style.stageName}>
+          {printStageName()} {`(${currentIndex + 1}/${stages.length})`}
+        </div>
+        <div className={style.nextButton}>
+          {nextButton()}
+        </div>
+      </div>
+      <div className={style[stages[currentIndex]]}></div>
+      <div className={style.exitButton}>
+        {exitButton()}
+      </div>
+    </div>
+  );
+
+};

tools/janken/src/index.css

@@ -0,0 +1,13 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}

tools/janken/src/index.tsx

@@ -0,0 +1,17 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+ReactDOM.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+  document.getElementById('root')
+);
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: https://bit.ly/CRA-PWA
+serviceWorker.unregister();

tools/janken/src/logo.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3">
+    <g fill="#61DAFB">
+        <path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/>
+        <circle cx="420.9" cy="296.5" r="45.7"/>
+        <path d="M520.5 78.1z"/>
+    </g>
+</svg>

tools/janken/src/model/messages.ts

@@ -0,0 +1,20 @@
+export interface ILoginMessage {
+  playerOne: string;
+  playerTwo: string;
+}
+
+export interface IJankenResult {
+  playerOne: string;
+  playerTwo: string;
+  playerOneOption: string;
+  playerTwoOption: string;
+}
+
+export interface ILogin {
+  userName: string;
+}
+
+export interface IJankenSelect {
+  userName: string;
+  option: string;
+}

tools/janken/src/react-app-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="react-scripts" />

tools/janken/src/serviceWorker.ts

@@ -0,0 +1,149 @@
+// This optional code is used to register a service worker.
+// register() is not called by default.
+
+// This lets the app load faster on subsequent visits in production, and gives
+// it offline capabilities. However, it also means that developers (and users)
+// will only see deployed updates on subsequent visits to a page, after all the
+// existing tabs open on the page have been closed, since previously cached
+// resources are updated in the background.
+
+// To learn more about the benefits of this model and instructions on how to
+// opt-in, read https://bit.ly/CRA-PWA
+
+const isLocalhost = Boolean(
+  window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.0/8 are considered localhost for IPv4.
+    window.location.hostname.match(
+      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+    )
+);
+
+type Config = {
+  onSuccess?: (registration: ServiceWorkerRegistration) => void;
+  onUpdate?: (registration: ServiceWorkerRegistration) => void;
+};
+
+export function register(config?: Config) {
+  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+    // The URL constructor is available in all browsers that support SW.
+    const publicUrl = new URL(
+      process.env.PUBLIC_URL,
+      window.location.href
+    );
+    if (publicUrl.origin !== window.location.origin) {
+      // Our service worker won't work if PUBLIC_URL is on a different origin
+      // from what our page is served on. This might happen if a CDN is used to
+      // serve assets; see https://github.com/facebook/create-react-app/issues/2374
+      return;
+    }
+
+    window.addEventListener('load', () => {
+      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+      if (isLocalhost) {
+        // This is running on localhost. Let's check if a service worker still exists or not.
+        checkValidServiceWorker(swUrl, config);
+
+        // Add some additional logging to localhost, pointing developers to the
+        // service worker/PWA documentation.
+        navigator.serviceWorker.ready.then(() => {
+          console.log(
+            'This web app is being served cache-first by a service ' +
+              'worker. To learn more, visit https://bit.ly/CRA-PWA'
+          );
+        });
+      } else {
+        // Is not localhost. Just register service worker
+        registerValidSW(swUrl, config);
+      }
+    });
+  }
+}
+
+function registerValidSW(swUrl: string, config?: Config) {
+  navigator.serviceWorker
+    .register(swUrl)
+    .then(registration => {
+      registration.onupdatefound = () => {
+        const installingWorker = registration.installing;
+        if (installingWorker == null) {
+          return;
+        }
+        installingWorker.onstatechange = () => {
+          if (installingWorker.state === 'installed') {
+            if (navigator.serviceWorker.controller) {
+              // At this point, the updated precached content has been fetched,
+              // but the previous service worker will still serve the older
+              // content until all client tabs are closed.
+              console.log(
+                'New content is available and will be used when all ' +
+                  'tabs for this page are closed. See https://bit.ly/CRA-PWA.'
+              );
+
+              // Execute callback
+              if (config && config.onUpdate) {
+                config.onUpdate(registration);
+              }
+            } else {
+              // At this point, everything has been precached.
+              // It's the perfect time to display a
+              // "Content is cached for offline use." message.
+              console.log('Content is cached for offline use.');
+
+              // Execute callback
+              if (config && config.onSuccess) {
+                config.onSuccess(registration);
+              }
+            }
+          }
+        };
+      };
+    })
+    .catch(error => {
+      console.error('Error during service worker registration:', error);
+    });
+}
+
+function checkValidServiceWorker(swUrl: string, config?: Config) {
+  // Check if the service worker can be found. If it can't reload the page.
+  fetch(swUrl, {
+    headers: { 'Service-Worker': 'script' }
+  })
+    .then(response => {
+      // Ensure service worker exists, and that we really are getting a JS file.
+      const contentType = response.headers.get('content-type');
+      if (
+        response.status === 404 ||
+        (contentType != null && contentType.indexOf('javascript') === -1)
+      ) {
+        // No service worker found. Probably a different app. Reload the page.
+        navigator.serviceWorker.ready.then(registration => {
+          registration.unregister().then(() => {
+            window.location.reload();
+          });
+        });
+      } else {
+        // Service worker found. Proceed as normal.
+        registerValidSW(swUrl, config);
+      }
+    })
+    .catch(() => {
+      console.log(
+        'No internet connection found. App is running in offline mode.'
+      );
+    });
+}
+
+export function unregister() {
+  if ('serviceWorker' in navigator) {
+    navigator.serviceWorker.ready
+      .then(registration => {
+        registration.unregister();
+      })
+      .catch(error => {
+        console.error(error.message);
+      });
+  }
+}

tools/janken/src/setupTests.ts

@@ -0,0 +1,5 @@
+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom/extend-expect';