101 lines
2.3 KiB
JavaScript
101 lines
2.3 KiB
JavaScript
import * as visuals from "./visuals.js";
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function get_json(url) {
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var request = new XMLHttpRequest();
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request.open("get", url, false);
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request.send(null);
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return JSON.parse(request.responseText);
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}
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class Backend {
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constructor() {
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this.config = new Configuration(
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new Map(Object.entries(get_json("http://localhost:3000/get_state/")))
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);
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}
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getConfig() {
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return this.config;
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}
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makeMove(move) {
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this.config.makeMove(move);
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}
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getAvailableMoves(position) {
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position;
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return [];
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}
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}
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class Chess {
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constructor() {
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this.backend = new Backend();
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this.canvas = new visuals.Canvas();
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this.configVis = new visuals.ConfigVis(this.backend.getConfig());
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this.configVis.draw(this.canvas);
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this.moveSource = null;
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this.canMoveTo = [];
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document.onclick = (ev) => this.click(ev);
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}
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syncBackend() {
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let config = this.backend.getConfig();
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this.configVis.configuration = config;
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this.configVis.draw(this.canvas);
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}
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showAvailableMoves(canMoveTo) {
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canMoveTo;
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}
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click(ev) {
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if (this.moveSource === null) {
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this._firstClick(ev);
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} else {
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this._secondClick(ev);
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}
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}
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_firstClick(ev) {
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let rcA = this.canvas.screenCoordsToRowCol(ev.clientX, ev.clientY);
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if (rcA === null) return;
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let positionA = visuals.rowColToBoardIndex(...rcA);
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this.showAvailableMoves(this.backend.getAvailableMoves(positionA));
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this.moveSource = positionA;
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}
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_secondClick(ev) {
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let rcB = this.canvas.screenCoordsToRowCol(ev.clientX, ev.clientY);
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if (rcB !== null) {
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let move = {
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from: this.moveSource,
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to: visuals.rowColToBoardIndex(...rcB),
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};
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this.backend.makeMove(move);
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this.syncBackend();
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}
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this.moveSource = null;
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}
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}
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class Configuration {
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constructor(board) {
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this.board = new Map(board);
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}
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getAt(position) {
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if (!this.board.has(position)) {
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return null;
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}
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return this.board.get(position);
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}
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setAt(position, piece) {
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this.board.set(position, piece);
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}
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dropAt(position) {
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this.board.delete(position);
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}
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makeMove(move) {
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const piece = this.getAt(move.from);
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if (piece === null) return;
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else {
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this.setAt(move.to, piece);
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this.dropAt(move.from);
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}
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}
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}
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new Chess();
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