From 64cbab59dd9719817908c835056e1a95821ca509 Mon Sep 17 00:00:00 2001
From: Shelly Huang <shellyhuang81@gmail.com>
Date: Fri, 15 Sep 2017 16:53:52 -0400
Subject: [PATCH] adjusted index.js to make game work

---
 react-fb-tictactoe/src/index.js | 146 ++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)

diff --git a/react-fb-tictactoe/src/index.js b/react-fb-tictactoe/src/index.js
index fae3e350..aa469914 100644
--- a/react-fb-tictactoe/src/index.js
+++ b/react-fb-tictactoe/src/index.js
@@ -6,3 +6,149 @@ import registerServiceWorker from './registerServiceWorker';
 
 ReactDOM.render(<App />, document.getElementById('root'));
 registerServiceWorker();
+
+function Square(props){
+	return(
+		<button className="square" onClick={props.onClick}>
+			{props.value}
+		</button>
+	);
+}
+
+class Board extends React.Component {
+  renderSquare(i) {
+    return (
+      <Square 
+    	 value = {this.props.squares[i]} 
+    	 onClick = {()=> this.props.onClick(i)}
+      />
+    );
+  }
+
+  render() {
+    return (
+      <div>
+        <div className="board-row">
+          {this.renderSquare(0)}
+          {this.renderSquare(1)}
+          {this.renderSquare(2)}
+        </div>
+        <div className="board-row">
+          {this.renderSquare(3)}
+          {this.renderSquare(4)}
+          {this.renderSquare(5)}
+        </div>
+        <div className="board-row">
+          {this.renderSquare(6)}
+          {this.renderSquare(7)}
+          {this.renderSquare(8)}
+        </div>
+      </div>
+    );
+  }
+}
+
+class Game extends React.Component {
+  constructor(){
+    super();
+    this.state = {
+      history: [{                                                                                                
+        squares: Array(9).fill(null),  
+      }],
+      stepNumber: 0,
+      xIsNext: true,
+    };
+  }
+
+  handleClick (i){
+    const history = this.state.history.slice(0, this.state.stepNumber +1);
+    const current = history[history.length - 1];
+    const squares = current.squares.slice();
+    if(calculateWinner(squares) || squares[i]){
+      return;
+    }
+    squares[i] = this.state.xIsNext ? 'X' : 'O';
+    this.setState({
+      history: history.concat([{
+        squares: squares,
+      }]),
+      stepNumber: history.length,
+      xIsNext: !this.state.xIsNext,
+    });
+  }
+
+  jumpTo(step){
+    this.setState({
+      stepNumber: step,
+      xIsNext: (step%2) === 0,
+    });
+  }
+
+  render() {
+    const history = this.state.history;
+    const current = history[this.state.stepNumber];
+    const winner = calculateWinner(current.squares);
+
+    const moves = history.map((step, move) => {
+      const desc = move ?
+        'Move #' + move :
+        'Game start';
+      return (
+        <li key={move}>
+          <a href ='#' onClick={() => this.jumpTo(move)}>{desc}</a>
+        </li>
+
+      );
+    });
+
+
+    let status;
+    if(winner){
+      status = 'Winner: ' + winner;
+    }else{
+      status = 'Next player: ' + (this.state.xIsNext ? 'X' : 'O');
+    }
+
+    return (
+      <div className="game">
+        <div className="game-board">
+          <Board 
+            squares={current.squares}
+            onClick={(i) => this.handleClick(i)}
+          />
+        </div>
+        <div className="game-info">
+          <div>{status}</div>
+          <ol>{moves}</ol>
+        </div>
+      </div>
+    );
+  }
+}
+
+// ========================================
+
+function calculateWinner(squares){
+	const lines = [
+		[0, 1, 2],
+		[3, 4, 5],
+		[6, 7, 8],
+		[0, 3, 6],
+		[1, 4, 7],
+		[2, 5, 8],
+		[0, 4, 8],
+		[2, 4, 6],
+	];
+	for(let i = 0; i < lines.length; ++i){
+		const[a, b, c] = lines[i];
+		if(squares[a] && squares[a] === squares[b] && squares[a] === squares[c]){
+			return squares[a];
+		}
+	}
+	return null;
+}
+
+ReactDOM.render(
+  <Game />,
+  document.getElementById('root')
+);