-const cors = require("cors");
-const body_parser = require("body-parser");
-const path = require("path");
-const nunjucks = require("nunjucks");
-
-const app = express();
-app.use(cors());
-app.use(body_parser.urlencoded({ extended: false }));
-app.use(body_parser.json());
-
-nunjucks.configure("templates", {
- autoescape: true,
- express: app
-});
+const Game = require("./game.js");
+
+const router = express.Router();
+
+class TicTacToe extends Game {
+ constructor(id) {
+ super(id);
+ this.state = {
+ moves: [],
+ board: Array(9).fill(""),
+ next_player: "X",
+ };
+ }
+
+ /* Returns Boolean indicating whether move was legal and added. */
+ add_move(square) {
+ /* Cannot move to an occupied square. */
+ if (this.state.board[square])
+ return false;
+
+ this.state.board[square] = this.state.next_player;
+ this.state.moves.push(square);
+
+ if (this.state.next_player === "X")
+ this.state.next_player = "O";
+ else
+ this.state.next_player = "X";