66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
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// @flow
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/**
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* Abstract class used to represent a BaseShape.
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* Abstract classes do not exist by default in Javascript: we force it by throwing errors in the constructor
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* and in methods to implement
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*/
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export default class BaseShape {
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#currentShape: Array<Array<number>>;
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#rotation: number;
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position: Object;
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constructor() {
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if (this.constructor === BaseShape)
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throw new Error("Abstract class can't be instantiated");
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this.#rotation = 0;
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this.position = {x: 0, y: 0};
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this.#currentShape = this.getShapes()[this.#rotation];
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}
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getColor(): string {
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throw new Error("Method 'getColor()' must be implemented");
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}
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getShapes(): Array<Array<Array<number>>> {
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throw new Error("Method 'getShapes()' must be implemented");
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}
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getCurrentShape() {
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return this.#currentShape;
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}
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getCellsCoordinates(isAbsolute: boolean) {
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let coordinates = [];
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for (let row = 0; row < this.#currentShape.length; row++) {
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for (let col = 0; col < this.#currentShape[row].length; col++) {
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if (this.#currentShape[row][col] === 1)
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if (isAbsolute)
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coordinates.push({x: this.position.x + col, y: this.position.y + row});
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else
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coordinates.push({x: col, y: row});
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}
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}
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return coordinates;
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}
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rotate(isForward: boolean) {
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if (isForward)
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this.#rotation++;
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else
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this.#rotation--;
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if (this.#rotation > 3)
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this.#rotation = 0;
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else if (this.#rotation < 0)
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this.#rotation = 3;
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this.#currentShape = this.getShapes()[this.#rotation];
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}
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move(x: number, y: number) {
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this.position.x += x;
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this.position.y += y;
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}
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}
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