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- // @flow
-
- import Piece from "./Piece";
- import ScoreManager from "./ScoreManager";
- import type {coordinates} from './Shapes/BaseShape';
-
-
- export type cell = {color: string, isEmpty: boolean, key: string};
- export type grid = Array<Array<cell>>;
-
- /**
- * Class used to manage the game grid
- *
- */
- export default class GridManager {
-
- #currentGrid: grid;
- #colors: Object;
-
- /**
- * Initializes a grid of the given size
- *
- * @param width The grid width
- * @param height The grid height
- * @param colors Object containing current theme colors
- */
- constructor(width: number, height: number, colors: Object) {
- this.#colors = colors;
- this.#currentGrid = this.getEmptyGrid(height, width);
- }
-
- /**
- * Get the current grid
- *
- * @return {grid} The current grid
- */
- getCurrentGrid(): grid {
- return this.#currentGrid;
- }
-
- /**
- * Get a new empty grid line of the given size
- *
- * @param width The line size
- * @return {Array<cell>}
- */
- getEmptyLine(width: number): Array<cell> {
- let line = [];
- for (let col = 0; col < width; col++) {
- line.push({
- color: this.#colors.tetrisBackground,
- isEmpty: true,
- key: col.toString(),
- });
- }
- return line;
- }
-
- /**
- * Gets a new empty grid
- *
- * @param width The grid width
- * @param height The grid height
- * @return {grid} A new empty grid
- */
- getEmptyGrid(height: number, width: number): grid {
- let grid = [];
- for (let row = 0; row < height; row++) {
- grid.push(this.getEmptyLine(width));
- }
- return grid;
- }
-
- /**
- * Removes the given lines from the grid,
- * shifts down every line on top and adds new empty lines on top.
- *
- * @param lines An array of line numbers to remove
- * @param scoreManager A reference to the score manager
- */
- clearLines(lines: Array<number>, scoreManager: ScoreManager) {
- lines.sort();
- for (let i = 0; i < lines.length; i++) {
- this.#currentGrid.splice(lines[i], 1);
- this.#currentGrid.unshift(this.getEmptyLine(this.#currentGrid[0].length));
- }
- scoreManager.addLinesRemovedPoints(lines.length);
- }
-
- /**
- * Gets the lines to clear around the given piece's coordinates.
- * The piece's coordinates are used for optimization and to prevent checking the whole grid.
- *
- * @param coord The piece's coordinates to check lines at
- * @return {Array<number>} An array containing the line numbers to clear
- */
- getLinesToClear(coord: Array<coordinates>): Array<number> {
- let rows = [];
- for (let i = 0; i < coord.length; i++) {
- let isLineFull = true;
- for (let col = 0; col < this.#currentGrid[coord[i].y].length; col++) {
- if (this.#currentGrid[coord[i].y][col].isEmpty) {
- isLineFull = false;
- break;
- }
- }
- if (isLineFull && rows.indexOf(coord[i].y) === -1)
- rows.push(coord[i].y);
- }
- return rows;
- }
-
- /**
- * Freezes the given piece to the grid
- *
- * @param currentObject The piece to freeze
- * @param scoreManager A reference to the score manager
- */
- freezeTetromino(currentObject: Piece, scoreManager: ScoreManager) {
- this.clearLines(this.getLinesToClear(currentObject.getCoordinates()), scoreManager);
- }
- }
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