Added rotation feature

screens/Tetris/GameLogic.js

@@ -19,6 +19,7 @@ export default class GameLogic {
     gameTickInterval: IntervalID;
 
     onTick: Function;
+    endCallback: Function;
 
     constructor(height: number, width: number) {
         this.height = height;
@@ -114,6 +115,12 @@ export default class GameLogic {
         }
     }
 
+    tryRotateTetromino() {
+        this.currentObject.rotate(true);
+        if (!this.isTetrominoPositionValid())
+            this.currentObject.rotate(false);
+    }
+
     onTick(callback: Function) {
         this.gameTime++;
         this.score++;
@@ -131,6 +138,11 @@ export default class GameLogic {
         callback(this.getFinalGrid());
     }
 
+    rotatePressed(callback: Function) {
+        this.tryRotateTetromino();
+        callback(this.getFinalGrid());
+    }
+
     createTetromino() {
         let shape = Math.floor(Math.random() * 7);
         this.currentObject = new Tetromino(shape);
@@ -140,10 +152,12 @@ export default class GameLogic {
 
     endGame() {
         console.log('Game Over!');
+        this.gameRunning = false;
         clearInterval(this.gameTickInterval);
+        this.endCallback(this.gameTime, this.score);
     }
 
-    startGame(callback: Function) {
+    startGame(tickCallback: Function, endCallback: Function) {
         if (this.gameRunning)
             return;
         this.gameRunning = true;
@@ -151,8 +165,10 @@ export default class GameLogic {
         this.score = 0;
         this.currentGrid = this.getEmptyGrid();
         this.createTetromino();
-        this.onTick = this.onTick.bind(this, callback);
+        tickCallback(this.gameTime, this.score, this.getFinalGrid());
+        this.onTick = this.onTick.bind(this, tickCallback);
         this.gameTickInterval = setInterval(this.onTick, this.gameTick);
+        this.endCallback = endCallback;
     }
 
 }

screens/Tetris/TetrisScreen.js

@@ -22,6 +22,7 @@ class TetrisScreen extends React.Component<Props, State> {
 
     logic: GameLogic;
     onTick: Function;
+    onGameEnd: Function;
     updateGrid: Function;
 
     constructor(props) {
@@ -34,6 +35,7 @@ class TetrisScreen extends React.Component<Props, State> {
             gameScore: 0,
         };
         this.onTick = this.onTick.bind(this);
+        this.onGameEnd = this.onGameEnd.bind(this);
         this.updateGrid = this.updateGrid.bind(this);
         const onScreenBlur = this.onScreenBlur.bind(this);
         this.props.navigation.addListener('blur', onScreenBlur);
@@ -63,10 +65,17 @@ class TetrisScreen extends React.Component<Props, State> {
 
     startGame() {
         if (!this.logic.isGameRunning()) {
-            this.logic.startGame(this.onTick);
+            this.logic.startGame(this.onTick, this.onGameEnd);
         }
     }
 
+    onGameEnd(time: number, score: number) {
+        this.setState({
+            gameTime: time,
+            gameScore: score,
+        })
+    }
+
     render() {
         return (
             <View style={{
@@ -104,8 +113,13 @@ class TetrisScreen extends React.Component<Props, State> {
                     <IconButton
                         icon="format-rotate-90"
                         size={40}
-                        onPress={() => this.startGame()}
+                        onPress={() => this.logic.rotatePressed(this.updateGrid)}
                     />
+                    <IconButton
+                    icon="power"
+                    size={40}
+                    onPress={() => this.startGame()}
+                />
                 </View>
             </View>
         );

screens/Tetris/Tetromino.js

@@ -22,6 +22,11 @@ export default class Tetromino {
             [0, 1, 0],
             [1, 1, 1],
         ],
+        20: [
+            [1, 0],
+            [1, 1],
+            [1, 0],
+        ],
         3: [
             [0, 1, 1],
             [1, 1, 0],
@@ -48,14 +53,18 @@ export default class Tetromino {
         4: '#ff000b',
         5: '#1000ff',
         6: '#ff9400',
-    }
+    };
 
 
-    currentType: Tetromino.types;
+    currentType: Object;
+    currentShape: Object;
+    currentRotation: number;
     position: Object;
 
     constructor(type: Tetromino.types) {
         this.currentType = type;
+        this.currentShape = Tetromino.shapes[type];
+        this.currentRotation = 0;
         this.position = {x: 0, y: 0};
     }
 
@@ -65,15 +74,37 @@ export default class Tetromino {
 
     getCellsCoordinates() {
         let coordinates = [];
-        for (let row = 0; row < Tetromino.shapes[this.currentType].length; row++) {
+        for (let row = 0; row < this.currentShape.length; row++) {
-            for (let col = 0; col < Tetromino.shapes[this.currentType][row].length; col++) {
+            for (let col = 0; col < this.currentShape[row].length; col++) {
-                if (Tetromino.shapes[this.currentType][row][col] === 1)
+                if (this.currentShape[row][col] === 1)
                     coordinates.push({x: this.position.x + col, y: this.position.y + row});
             }
         }
         return coordinates;
     }
 
+    rotate(isForward) {
+        this.currentRotation++;
+        if (this.currentRotation > 3)
+            this.currentRotation = 0;
+
+        if (this.currentRotation === 0) {
+            this.currentShape = Tetromino.shapes[this.currentType];
+        } else {
+            let result = [];
+            for(let i = 0; i < this.currentShape[0].length; i++) {
+                let row = this.currentShape.map(e => e[i]);
+
+                if (isForward)
+                    result.push(row.reverse());
+                else
+                    result.push(row);
+            }
+            this.currentShape = result;
+        }
+
+    }
+
     move(x: number, y: number) {
         this.position.x += x;
         this.position.y += y;