106 lines
2.9 KiB
JavaScript
106 lines
2.9 KiB
JavaScript
// @flow
|
|
|
|
export type coordinates = {
|
|
x: number,
|
|
y: number,
|
|
}
|
|
|
|
/**
|
|
* Abstract class used to represent a BaseShape.
|
|
* Abstract classes do not exist by default in Javascript: we force it by throwing errors in the constructor
|
|
* and in methods to implement
|
|
*/
|
|
export default class BaseShape {
|
|
|
|
#currentShape: Array<Array<number>>;
|
|
#rotation: number;
|
|
position: coordinates;
|
|
|
|
/**
|
|
* Prevent instantiation if classname is BaseShape to force class to be abstract
|
|
*/
|
|
constructor() {
|
|
if (this.constructor === BaseShape)
|
|
throw new Error("Abstract class can't be instantiated");
|
|
this.#rotation = 0;
|
|
this.position = {x: 0, y: 0};
|
|
this.#currentShape = this.getShapes()[this.#rotation];
|
|
}
|
|
|
|
/**
|
|
* Gets this shape's color.
|
|
* Must be implemented by child class
|
|
*/
|
|
getColor(): string {
|
|
throw new Error("Method 'getColor()' must be implemented");
|
|
}
|
|
|
|
/**
|
|
* Gets this object's all possible shapes as an array.
|
|
* Must be implemented by child class.
|
|
*
|
|
* Used by tests to read private fields
|
|
*/
|
|
getShapes(): Array<Array<Array<number>>> {
|
|
throw new Error("Method 'getShapes()' must be implemented");
|
|
}
|
|
|
|
/**
|
|
* Gets this object's current shape.
|
|
*
|
|
* Used by tests to read private fields
|
|
*/
|
|
getCurrentShape(): Array<Array<number>> {
|
|
return this.#currentShape;
|
|
}
|
|
|
|
/**
|
|
* Gets this object's coordinates.
|
|
* This will return an array of coordinates representing the positions of the cells used by this object.
|
|
*
|
|
* @param isAbsolute Should we take into account the current position of the object?
|
|
* @return {Array<coordinates>} This object cells coordinates
|
|
*/
|
|
getCellsCoordinates(isAbsolute: boolean): Array<coordinates> {
|
|
let coordinates = [];
|
|
for (let row = 0; row < this.#currentShape.length; row++) {
|
|
for (let col = 0; col < this.#currentShape[row].length; col++) {
|
|
if (this.#currentShape[row][col] === 1)
|
|
if (isAbsolute)
|
|
coordinates.push({x: this.position.x + col, y: this.position.y + row});
|
|
else
|
|
coordinates.push({x: col, y: row});
|
|
}
|
|
}
|
|
return coordinates;
|
|
}
|
|
|
|
/**
|
|
* Rotate this object
|
|
*
|
|
* @param isForward Should we rotate clockwise?
|
|
*/
|
|
rotate(isForward: boolean) {
|
|
if (isForward)
|
|
this.#rotation++;
|
|
else
|
|
this.#rotation--;
|
|
if (this.#rotation > 3)
|
|
this.#rotation = 0;
|
|
else if (this.#rotation < 0)
|
|
this.#rotation = 3;
|
|
this.#currentShape = this.getShapes()[this.#rotation];
|
|
}
|
|
|
|
/**
|
|
* Move this object
|
|
*
|
|
* @param x Position X offset to add
|
|
* @param y Position Y offset to add
|
|
*/
|
|
move(x: number, y: number) {
|
|
this.position.x += x;
|
|
this.position.y += y;
|
|
}
|
|
|
|
}
|