step9

Author: rasor

src/pages/Step9Page.jsx

@@ -7,10 +7,185 @@ import utils from '../helpers/utils';
 const Step9Page = () => {
   return (
     <Frame title="Step9: Resetting a React component">
-      <p>Here comes something in Frame</p>   
+      <GameGenerator />
     </Frame>
   );
 };
 export default Step9Page;
 
 /** https://jscomplete.com/playground/rs3.9 */
+const GameStatus = {
+  NEW: 'NEW',
+  CHALLENGE: 'CHALLENGE',
+  PLAYING: 'PLAYING',
+  WON: 'WON',
+  LOST: 'LOST',
+};
+
+const CellStatus = {
+  NORMAL: 'white',
+  HIGHLIGHT: 'lightblue',
+  CORRECT: 'lightgreen',
+  WRONG: 'pink',
+};
+
+const Messages = {
+  NEW: 'You will have a few seconds to memorize the blue random cells',
+  CHALLENGE: 'Remember these blue cells now',
+  PLAYING: 'Which cells were blue?',
+  WON: 'Victory!',
+  LOST: 'Game Over',
+};
+
+const Cell = ({ width, gameStatus, isChallenge, isPicked, onClick }) => {
+  let cellStatus = CellStatus.NORMAL;
+  if (gameStatus !== GameStatus.NEW) {
+    if (isPicked) {
+      cellStatus = isChallenge ? CellStatus.CORRECT : CellStatus.WRONG;
+    } else if (
+      isChallenge &&
+      (gameStatus === GameStatus.CHALLENGE || gameStatus === GameStatus.LOST)
+    ) {
+      cellStatus = CellStatus.HIGHLIGHT;
+    }
+  }
+  return (
+    <div
+      className="cell"
+      style={{ width: `${width}%`, backgroundColor: cellStatus }}
+      onClick={onClick}
+    />
+  );
+};
+
+const Footer = ({ gameStatus, countdown, startGame, resetGame }) => {
+  const buttonAreaContent = () => {
+    switch(gameStatus) {
+      case GameStatus.NEW:
+        return <button onClick={startGame}>Start Game</button>;
+      case GameStatus.CALLENGE:
+        // fall-through
+      case GameStatus.PLAYING:
+        return countdown;
+      case GameStatus.WON:
+        // fall-through
+      case GameStatus.LOST:
+        return <button onClick={resetGame}>Play Again</button>;
+    }
+  };
+  return (
+    <>
+      <div className="message">{Messages[gameStatus]}</div>
+      <div className="button">{buttonAreaContent()}</div>
+    </>
+  );
+};
+  
+const GameSession = ({
+  cellIds,
+  challengeCellIds,
+  cellWidth,
+  challengeSize,
+  challengeSeconds,
+  playSeconds,
+  maxWrongAttempts,
+}) => {
+  const [gameStatus, setGameStatus] = useState(GameStatus.NEW);
+  const [pickedCellIds, setPickedCellIds] = useState([]);
+  const [countdown, setCountdown] = useState(playSeconds);
+  
+  useEffect(() => {
+    let timerId;
+    if (gameStatus === GameStatus.CHALLENGE) {
+      timerId = setTimeout(
+        () => setGameStatus(GameStatus.PLAYING),
+        1000 * challengeSeconds
+      );
+    }
+    if (gameStatus === GameStatus.PLAYING) {
+      timerId = setInterval(() => {
+        setCountdown(countdown => {
+          if (countdown === 1) {
+            clearTimeout(timerId);
+            setGameStatus(GameStatus.LOST);
+          }
+          return countdown - 1;
+        });
+      }, 1000);
+    }
+    return () => clearTimeout(timerId);
+  }, [challengeSeconds, gameStatus]);  
+  
+  React.useEffect(() => {
+    const [correctPicks, wrongPicks] = utils.arrayCrossCounts(
+      pickedCellIds,
+      challengeCellIds
+    );
+    if (correctPicks === challengeSize) {
+      setGameStatus(GameStatus.WON);
+    }
+    if (wrongPicks === maxWrongAttempts) {
+      setGameStatus(GameStatus.LOST);
+    }
+  }, [pickedCellIds]);
+  
+  const pickCell = cellId => {
+    if (gameStatus === GameStatus.PLAYING) {
+      setPickedCellIds(pickedCellIds => {
+        if (pickedCellIds.includes(cellId)) {
+          return pickedCellIds;
+        }
+        return [...pickedCellIds, cellId];
+      });
+    }
+  };  
+  
+  const resetGame = () => {
+    setGameStatus(GameStatus.NEW);
+    setPickedCellIds([]);
+    setCountdown(playSeconds);
+  };
+
+  return (
+    <div className="game">
+      <div className="grid">
+        {cellIds.map(cellId => (
+          <Cell 
+            key={cellId} 
+            width={cellWidth}
+            gameStatus={gameStatus}
+            isChallenge={challengeCellIds.includes(cellId)}
+            isPicked={pickedCellIds.includes(cellId)}
+            onClick={() => pickCell(cellId)}
+            />
+        ))}
+      </div>
+      <Footer
+        gameStatus={gameStatus}
+        countdown={countdown}
+        startGame={() => setGameStatus(GameStatus.CHALLENGE)}
+        resetGame={resetGame}
+      />
+    </div>
+  );
+};
+
+const GameGenerator = () => {
+  const gridSize = 5;
+  const challengeSize = 6;
+  const cellIds = utils.createArray(gridSize * gridSize);
+  const cellWidth = 100 / gridSize;
+  const challengeCellIds = utils.sampleArray(cellIds, challengeSize);
+  
+  return (
+    <GameSession
+      cellIds={cellIds}
+      challengeCellIds={challengeCellIds}
+      cellWidth={cellWidth}
+      challengeSize={challengeSize}
+      challengeSeconds={3}
+      playSeconds={10}
+      maxWrongAttempts={3}
+    />
+  );
+};