Cleanup code

README.md

@@ -1,4 +1,4 @@
-# Kana Quiz 2
+# Kana Quiz
 Kana Quiz made with React.js.
 
 See live at https://kana.pro/

src/components/App/App.jsx

@@ -7,20 +7,13 @@ import { removeHash } from '../../data/helperFuncs';
 const options = {};
 
 class App extends Component {
-    constructor(props) {
-        super(props);
-        this.state = {
-            gameState: 'chooseCharacters'
-        }
-        this.startGame = this.startGame.bind(this);
-        this.endGame = this.endGame.bind(this);
-    }
+  state = { gameState: 'chooseCharacters' };
 
-    startGame() {
+  startGame = () => {
     this.setState({gameState: 'game'});
   }
 
-    endGame() {
+  endGame = () => {
     this.setState({gameState: 'chooseCharacters'});
   }
 

src/components/ChooseCharacters/CharacterGroup.jsx

@@ -1,25 +1,19 @@
 import React, { Component } from 'react';
 
 class CharacterGroup extends Component {
-    constructor(props) {
-        super(props);
-        this.state = {
-            shownChars : '',
-        }
-        this.changeShownChars = this.changeShownChars.bind(this);
-    }
+  state = { shownChars: '' }
 
-    changeShownChars(newString, e) {
+  changeShownChars(newString) {
     this.setState({shownChars: newString})
   }
 
   getShowableCharacters(whichKana) {
     let strRomajiCharacters = '';
     let strKanaCharacters = '';
-        Object.keys(this.props.characters).map(function(character) {
+    Object.keys(this.props.characters).map(character => {
       strRomajiCharacters+=this.props.characters[character][0]+' · ';
       strKanaCharacters+=character+' · ';
-        }, this);
+    });
     strRomajiCharacters = strRomajiCharacters.slice(0, -2);
     strKanaCharacters = strKanaCharacters.slice(0, -2);
     if(whichKana=='romaji') return strRomajiCharacters;
@@ -32,7 +26,8 @@ class CharacterGroup extends Component {
 
   render() {
     return (
-            <div className={
+      <div
+      className={
         'choose-row' + (this.props.groupName.endsWith('_a') || this.props.groupName.endsWith('_s') ? ' alt-row' : '')
       }
       onClick={() => {

src/components/ChooseCharacters/ChooseCharacters.jsx

@@ -5,19 +5,13 @@ import './ChooseCharacters.scss';
 import CharacterGroup from './CharacterGroup';
 
 class ChooseCharacters extends Component {
-    constructor(props) {
-        super(props);
-        this.state = {
+  state = {
     errMsg : '',
     selectedGroups: this.props.selectedGroups,
     showAlternatives: [],
     showSimilars: [],
     startIsVisible: true
   }
-        this.toggleSelect = this.toggleSelect.bind(this);
-        this.startGame = this.startGame.bind(this);
-        this.testIsStartVisible = this.testIsStartVisible.bind(this);
-    }
 
   componentDidMount() {
     this.testIsStartVisible();
@@ -34,7 +28,7 @@ class ChooseCharacters extends Component {
     this.testIsStartVisible();
   }
 
-    testIsStartVisible() {
+  testIsStartVisible = () => {
     if(this.startRef) {
       const rect = this.startRef.getBoundingClientRect();
       if(rect.y > window.innerHeight && this.state.startIsVisible)
@@ -73,7 +67,7 @@ class ChooseCharacters extends Component {
     this.setState({errMsg: '', selectedGroups: this.state.selectedGroups.concat(groupName)});
   }
 
-    toggleSelect(groupName) {
+  toggleSelect = groupName => {
     if(this.getIndex(groupName) > -1)
       this.removeSelect(groupName);
     else
@@ -214,7 +208,7 @@ class ChooseCharacters extends Component {
           <div className="col-xs-12">
             <div className="panel panel-default">
               <div className="panel-body welcome">
-                                <h4>Welcome to Kana Quiz!</h4>
+                <h4>Welcome to Kana Pro!</h4>
                 <p>Please choose the groups of characters that you'd like to be studying.</p>
               </div>
             </div>
@@ -266,7 +260,7 @@ class ChooseCharacters extends Component {
               this.state.errMsg != '' &&
                 <div className="error-message">{this.state.errMsg}</div>
             }
-                        <button ref={c => this.startRef = c} className="btn btn-danger startgame-button" onClick={this.startGame}>Start the Quiz!</button>
+            <button ref={c => this.startRef = c} className="btn btn-danger startgame-button" onClick={() => this.startGame()}>Start the Quiz!</button>
           </div>
           <div className="down-arrow"
             style={{display: this.state.startIsVisible ? 'none' : 'block'}}

src/components/Game/Game.jsx

@@ -4,39 +4,37 @@ import ShowStage from './ShowStage';
 import Question from './Question';
 
 class Game extends Component {
-    constructor(props) {
-        super(props);
-        this.state = {
-            showScreen: ''
-        }
-        this.showQuestion = this.showQuestion.bind(this);
-        this.stageUp = this.stageUp.bind(this);
-        this.lockStage = this.lockStage.bind(this);
-    }
-
-    stageUp() {
-        this.props.stageUp();
-        this.setState({showScreen: 'stage'});
-    }
-
-    lockStage(stage) {
-        this.setState({showScreen: 'question'});
-        this.props.lockStage(stage);
-    }
-
-    showQuestion() {
-        this.setState({showScreen: 'question'})
-    }
+  state = { showScreen: '' }
 
   componentWillMount() {
     this.setState({showScreen: 'stage'});
   }
 
+  stageUp = () => {
+    this.props.stageUp();
+    this.setState({showScreen: 'stage'});
+  }
+
+  lockStage = stage => {
+    this.setState({showScreen: 'question'});
+    this.props.lockStage(stage);
+  }
+
+  showQuestion = () => {
+    this.setState({showScreen: 'question'})
+  }
+
   render() {
     return (
       <div>
-                { this.state.showScreen==='stage' ? <ShowStage lockStage={this.lockStage} handleShowQuestion={this.showQuestion} handleEndGame={this.props.handleEndGame} stage={this.props.stage} /> : '' }
-                { this.state.showScreen==='question' ? <Question isLocked={this.props.isLocked} handleStageUp={this.stageUp} stage={this.props.stage} decidedGroups={this.props.decidedGroups} /> : '' }
+        {
+          this.state.showScreen==='stage' &&
+            <ShowStage lockStage={this.lockStage} handleShowQuestion={this.showQuestion} handleEndGame={this.props.handleEndGame} stage={this.props.stage} />
+        }
+        {
+          this.state.showScreen==='question' &&
+            <Question isLocked={this.props.isLocked} handleStageUp={this.stageUp} stage={this.props.stage} decidedGroups={this.props.decidedGroups} />
+        }
       </div>
     );
   }

src/components/Game/Question.jsx

@@ -5,9 +5,7 @@ import { findRomajisAtKanaKey, removeFromArray, arrayContains, shuffle, cartesia
 import './Question.scss';
 
 class Question extends Component {
-    constructor(props) {
-        super(props);
-        this.state = {
+  state = {
     previousQuestion: [],
     previousAnswer: '',
     currentAnswer: '',
@@ -15,11 +13,11 @@ class Question extends Component {
     answerOptions: [],
     stageProgress: 0
   }
-        this.setNewQuestion = this.setNewQuestion.bind(this);
-        this.handleAnswer = this.handleAnswer.bind(this);
-        this.handleAnswerChange = this.handleAnswerChange.bind(this);
-        this.handleSubmit = this.handleSubmit.bind(this);
-    }
+    // this.setNewQuestion = this.setNewQuestion.bind(this);
+    // this.handleAnswer = this.handleAnswer.bind(this);
+    // this.handleAnswerChange = this.handleAnswerChange.bind(this);
+    // this.handleSubmit = this.handleSubmit.bind(this);
+  // }
 
   getRandomKanas(amount, include, exclude) {
     let randomizedKanas = this.askableKanaKeys.slice();
@@ -41,22 +39,22 @@ class Question extends Component {
 
       // let's remove kanas that have the same answer as included
       let searchFor = findRomajisAtKanaKey(include, kanaDictionary)[0];
-            randomizedKanas = randomizedKanas.filter(function(character) {
+      randomizedKanas = randomizedKanas.filter(character => {
         return searchFor!=findRomajisAtKanaKey(character, kanaDictionary)[0];
-            }, this);
+      });
 
       // now let's remove "duplicate" kanas (if two kanas have same answers)
       let tempRandomizedKanas = randomizedKanas.slice();
-            randomizedKanas = randomizedKanas.filter(function(r) {
+      randomizedKanas = randomizedKanas.filter(r => {
         let dupeFound = false;
         searchFor = findRomajisAtKanaKey(r, kanaDictionary)[0];
         tempRandomizedKanas.shift();
-                tempRandomizedKanas.map(function(w) {
+        tempRandomizedKanas.forEach(w => {
           if(findRomajisAtKanaKey(w, kanaDictionary)[0]==searchFor)
             dupeFound = true;
-                }, this);
+        });
         return !dupeFound;
-            }, this);
+      });
 
       // alright, let's cut the array and add included to the end
       randomizedKanas = randomizedKanas.slice(0, amount-1); // -1 so we have room to add included
@@ -97,18 +95,18 @@ class Question extends Component {
     else if(this.props.stage==4) {
       let tempAllowedAnswers = [];
 
-            this.currentQuestion.map(function(key, idx) {
+      this.currentQuestion.forEach(key => {
         tempAllowedAnswers.push(findRomajisAtKanaKey(key, kanaDictionary));
-            }, this);
+      });
 
-            cartesianProduct(tempAllowedAnswers).map(function(answer) {
+      cartesianProduct(tempAllowedAnswers).forEach(answer => {
         this.allowedAnswers.push(answer.join(''));
-            }, this);
+      });
     }
     // console.log(this.allowedAnswers);
   }
 
-    handleAnswer(answer) {
+  handleAnswer = answer => {
     if(this.props.stage<=2) document.activeElement.blur(); // reset answer button's :active
     this.previousQuestion = this.currentQuestion;
     this.setState({previousQuestion: this.previousQuestion});
@@ -120,10 +118,8 @@ class Question extends Component {
     else
       this.stageProgress = this.stageProgress > 0 ? this.stageProgress - 1 : 0;
     this.setState({stageProgress: this.stageProgress});
-        if(this.stageProgress >= quizSettings.stageLength[this.props.stage] &&
-        !this.props.isLocked) {
-            let that = this;
-            setTimeout(function() { that.props.handleStageUp(); }, 300);
+    if(this.stageProgress >= quizSettings.stageLength[this.props.stage] && !this.props.isLocked) {
+      setTimeout(() => { this.props.handleStageUp() }, 300);
     }
     else
       this.setNewQuestion();
@@ -136,22 +132,22 @@ class Question extends Component {
     this.previousQuestion = '';
     this.previousAnswer = '';
     this.stageProgress = 0;
-        Object.keys(kanaDictionary).map(function(whichKana) {
+    Object.keys(kanaDictionary).forEach(whichKana => {
       // console.log(whichKana); // 'hiragana' or 'katakana'
-            Object.keys(kanaDictionary[whichKana]).map(function(groupName) {
+      Object.keys(kanaDictionary[whichKana]).forEach(groupName => {
         // console.log(groupName); // 'h_group1', ...
         // do we want to include this group?
         if(arrayContains(groupName, this.props.decidedGroups)) {
           // let's merge the group to our askableKanas
           this.askableKanas = Object.assign(this.askableKanas, kanaDictionary[whichKana][groupName]['characters']);
-                    Object.keys(kanaDictionary[whichKana][groupName]['characters']).map(function(key) {
+          Object.keys(kanaDictionary[whichKana][groupName]['characters']).forEach(key => {
             // let's add all askable kana keys to array
             this.askableKanaKeys.push(key);
             this.askableRomajis.push(kanaDictionary[whichKana][groupName]['characters'][key][0]);
-                    }, this);
+          });
         }
-            }, this);
-        }, this);
+      });
+    });
     // console.log(this.askableKanas);
   }
 
@@ -172,12 +168,24 @@ class Question extends Component {
     if(this.previousQuestion=='')
       resultString = <div className="previous-result none">Let's go! Which character is this?</div>
     else {
-            let rightAnswer = (this.props.stage==2?findRomajisAtKanaKey(this.previousQuestion, kanaDictionary)[0]:this.previousQuestion.join(''))+' = '+
-               this.previousAllowedAnswers[0];
+      let rightAnswer = (
+        this.props.stage==2 ?
+          findRomajisAtKanaKey(this.previousQuestion, kanaDictionary)[0]
+          : this.previousQuestion.join('')
+        )+' = '+ this.previousAllowedAnswers[0];
+
       if(this.isInAllowedAnswers(this.previousAnswer))
-                resultString = <div className="previous-result correct" title="Correct answer!"><span className="pull-left glyphicon glyphicon-none"></span>{rightAnswer}<span className="pull-right glyphicon glyphicon-ok"></span></div>
+        resultString = (
+          <div className="previous-result correct" title="Correct answer!">
+            <span className="pull-left glyphicon glyphicon-none"></span>{rightAnswer}<span className="pull-right glyphicon glyphicon-ok"></span>
+          </div>
+        );
       else
-                resultString = <div className="previous-result wrong" title="Wrong answer!"><span className="pull-left glyphicon glyphicon-none"></span>{rightAnswer}<span className="pull-right glyphicon glyphicon-remove"></span></div>
+        resultString = (
+          <div className="previous-result wrong" title="Wrong answer!">
+            <span className="pull-left glyphicon glyphicon-none"></span>{rightAnswer}<span className="pull-right glyphicon glyphicon-remove"></span>
+          </div>
+        );
     }
     return resultString;
   }
@@ -190,11 +198,11 @@ class Question extends Component {
     else return false;
   }
 
-    handleAnswerChange(e) {
+  handleAnswerChange = e => {
     this.setState({currentAnswer: e.target.value.replace(/\s+/g, '')});
   }
 
-    handleSubmit(e) {
+  handleSubmit = e => {
     e.preventDefault();
     if(this.state.currentAnswer!='') {
       this.handleAnswer(this.state.currentAnswer.toLowerCase());

src/components/GameContainer/GameContainer.jsx

@@ -4,38 +4,10 @@ import ChooseCharacters from '../ChooseCharacters/ChooseCharacters';
 import Game from '../Game/Game';
 
 class GameContainer extends Component {
-    constructor(props) {
-        super(props);
-        this.startGame = this.startGame.bind(this);
-        this.state = {
+  state = {
     stage:1,
     isLocked: false,
-            decidedGroups: ['h_group1']
-        }
-        this.stageUp = this.stageUp.bind(this);
-        this.lockStage = this.lockStage.bind(this);
-    }
-
-    startGame(decidedGroups) {
-        if(parseInt(this.state.stage)<1 || isNaN(parseInt(this.state.stage)))
-            this.setState({stage: 1});
-        else if(parseInt(this.state.stage)>4)
-            this.setState({stage: 4});
-
-        this.setState({decidedGroups: decidedGroups});
-        this.props.handleStartGame();
-    }
-
-    stageUp() {
-        this.setState({stage: this.state.stage+1});
-    }
-
-    lockStage(stage, forceLock) {
-        // if(stage<1 || stage>4) stage=1; // don't use this to allow backspace
-        if(forceLock)
-            this.setState({stage: stage, isLocked: true});
-        else
-            this.setState({stage: stage, isLocked: !this.state.isLocked});
+    decidedGroups: JSON.parse(localStorage.getItem('decidedGroups') || null) || []
   }
 
   componentWillReceiveProps() {
@@ -43,24 +15,49 @@ class GameContainer extends Component {
       this.setState({stage: 1});
   }
 
+  startGame = decidedGroups => {
+    if(parseInt(this.state.stage)<1 || isNaN(parseInt(this.state.stage)))
+      this.setState({stage: 1});
+    else if(parseInt(this.state.stage)>4)
+      this.setState({stage: 4});
+
+    this.setState({decidedGroups: decidedGroups});
+    localStorage.setItem('decidedGroups', JSON.stringify(decidedGroups));
+    this.props.handleStartGame();
+  }
+
+  stageUp = () => {
+    this.setState({stage: this.state.stage+1});
+  }
+
+  lockStage = (stage, forceLock) => {
+    // if(stage<1 || stage>4) stage=1; // don't use this to allow backspace
+    if(forceLock)
+      this.setState({stage: stage, isLocked: true});
+    else
+      this.setState({stage: stage, isLocked: !this.state.isLocked});
+  }
+
   render() {
     return (
       <div>
-                { this.props.gameState==='chooseCharacters' ?
+        { this.props.gameState==='chooseCharacters' &&
             <ChooseCharacters selectedGroups={this.state.decidedGroups}
               handleStartGame={this.startGame}
               stage={this.state.stage}
               isLocked={this.state.isLocked}
               lockStage={this.lockStage}
-                    /> : '' }
-                { this.props.gameState==='game' ?
+            />
+          }
+          { this.props.gameState==='game' &&
               <Game decidedGroups={this.state.decidedGroups}
                 handleEndGame={this.props.handleEndGame}
                 stageUp={this.stageUp}
                 stage={this.state.stage}
                 isLocked={this.state.isLocked}
                 lockStage={this.lockStage}
-                    /> : '' }
+              />
+          }
         </div>
     )
   }

src/components/Navbar/Navbar.jsx

@@ -3,21 +3,20 @@ import './Navbar.scss';
 
 class Navbar extends Component {
   render() {
-        let leftLink;
-        switch(this.props.gameState) {
-            case 'chooseCharacters':
-            default:
-                leftLink = <li id="nav-kanaquiz"><p className="nav navbar-text">Kana Quiz <span>2</span></p></li>
-                break;
-            case 'game':
-                leftLink = <li id="nav-choosecharacters"><a href="javascript:;" onClick={this.props.handleEndGame}><span className="glyphicon glyphicon-small glyphicon-arrow-left"></span> Back to menu</a></li>
-        }
     return (
       <nav className="navbar navbar-inverse navbar-fixed-top" role="navigation">
         <div className="container">
           <div id="navbar">
             <ul className="nav navbar-nav">
-                            {leftLink}
+              {
+                this.props.gameState == 'game' ? (
+                  <li id="nav-choosecharacters">
+                    <a href="javascript:;" onClick={this.props.handleEndGame}>
+                      <span className="glyphicon glyphicon-small glyphicon-arrow-left"></span> Back to menu
+                    </a>
+                  </li>
+                ) : <li id="nav-kanaquiz"><p className="nav navbar-text">Kana Pro</p></li>
+              }
             </ul>
           </div>
         </div>

src/index.html

@@ -1,13 +1,13 @@
 <!DOCTYPE html>
 <html lang="en">
   <head>
-    <title>Kana Quiz 2: Learn hiragana & katakana fast and easy</title>
+    <title>Kana Pro: Learn hiragana & katakana fast and easy</title>
     <meta charset="UTF-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="Description" content="Application for studying hiragana & katakana characters.">
   </head>
   <body>
-    <div class="app"></div>
+    <div id="app"></div>
   </body>
 </html>

src/index.js

@@ -1,7 +1,10 @@
 import React from 'react';
-import { render } from 'react-dom';
+import ReactDOM from 'react-dom';
 import Bootstrap from './assets/stylesheets/bootstrap.min.css';
 import App from './components/App/App';
 
-let element = React.createElement(App, {});
-render(element, document.querySelector('.app'));
+let appEl = document.getElementById('app');
+if(!appEl) // in case of old index.html in cache
+  appEl = document.querySelector('.app');
+
+ReactDOM.render(<App />, appEl);