const express = require("express");
+const Game = require("./game.js");
-const app = express.Router();
+const router = express.Router();
-class TicTacToe {
- constructor() {
+class TicTacToe extends Game {
+ constructor(id) {
+ super(id);
this.moves = [];
this.board = Array(9).fill(null);
- this.clients = [];
- this.next_client_id = 1;
}
/* Returns Boolean indicating whether move was legal and added. */
return true;
}
- add_client(response) {
- const id = this.next_client_id;
- this.clients.push({id: id,
- response: response});
- this.next_client_id++;
-
- return id;
- }
-
- remove_client(id) {
- this.clients = this.clients.filter(client => client.id !== id);
- }
-
- /* Send a string to all clients */
- broadcast_string(str) {
- this.clients.forEach(client => client.response.write(str + '\n'));
- }
-
- /* Send an event to all clients.
- *
- * An event has both a declared type and a separate data block.
- * It also ends with two newlines (to mark the end of the event).
- */
- broadcast_event(type, data) {
- this.broadcast_string(`event: ${type}\ndata: ${data}\n`);
- }
-
broadcast_move(square) {
this.broadcast_event("move", square);
}
-}
-app.get('/', (request, response) => {
- const game = request.game;
+ handle_events(request, response) {
+ super.handle_events(request, response);
- if (! request.session.nickname)
- response.render('choose-nickname.html', { game_name: "Tic Tac Toe" });
- else
- response.render('tictactoe-game.html');
-});
+ /* When a new client joins, replay all previous moves to it. */
+ for (let move of this.moves) {
+ response.write(`event: move\ndata: ${move}\n\n`);
+ }
+ }
+}
-app.post('/move', (request, response) => {
+router.post('/move', (request, response) => {
const game = request.game;
const square = request.body.square;
game.broadcast_move(square);
});
-app.get('/events', (request, response) => {
+router.get('/events', (request, response) => {
const game = request.game;
- /* These headers will keep the connection open so we can stream events. */
- const headers = {
- "Content-type": "text/event-stream",
- "Connection": "keep-alive",
- "Cache-Control": "no-cache"
- };
- response.writeHead(200, headers);
-
- /* Add this new client to our list of clients. */
- const id = game.add_client(response);
-
- /* And queue up cleanup to be triggered on client close. */
- request.on('close', () => {
- game.remove_client(id);
- });
+ game.handle_events(request, response);
});
-exports.app = app;
-exports.name = "tictactoe";
+exports.router = router;
exports.Game = TicTacToe;
+
+TicTacToe.meta = {
+ name: "Tic Tac Toe",
+ identifier: "tictactoe"
+};
+
+exports.meta = TicTacToe.meta;