X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=tictactoe.js;h=6d4b0148a4a12afa4a5e8046fd3c8447d9d6729d;hb=acbdb40a24a67c2461ed61ca410af5926c4db28b;hp=18fe3428806bee30c2c533182b15e02fee36993b;hpb=d04124365041fb3d9606a0aa56b49a2147565038;p=empires-server

diff --git a/tictactoe.js b/tictactoe.js
index 18fe342..6d4b014 100644
--- a/tictactoe.js
+++ b/tictactoe.js
@@ -1,20 +1,44 @@
 const express = require("express");
-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 engine_name = "tictactoe";
+
+const router = express.Router();
+
+class TicTacToe extends Game {
+  constructor() {
+    super(engine_name);
+    this.moves = [];
+    this.board = Array(9).fill(null);
+  }
+
+  /* Returns Boolean indicating whether move was legal and added. */
+  add_move(square) {
+    /* Cannot move to an occupied square. */
+    if (this.board[square])
+      return false;
+
+    this.board[square] = 'X';
+    this.moves.push(square);
 
-app.get('/', (request, response) => {
+    return true;
+  }
+
+  broadcast_move(square) {
+    this.broadcast_event("move", square);
+  }
+
+  handle_events(request, response) {
+    super.handle_events(request, response);
+
+    /* 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`);
+    }
+  }
+}
+
+router.get('/', (request, response) => {
   const game = request.game;
 
   if (! request.session.nickname)
@@ -23,4 +47,28 @@ app.get('/', (request, response) => {
     response.render('tictactoe-game.html');
 });
 
-exports.app = app;
+router.post('/move', (request, response) => {
+  const game = request.game;
+  const square = request.body.square;
+
+  const legal = game.add_move(square);
+
+  /* Inform this client whether the move was legal. */
+  response.send(JSON.stringify(legal));
+
+  /* And only if legal, inform all clients. */
+  if (! legal)
+    return;
+
+  game.broadcast_move(square);
+});
+
+router.get('/events', (request, response) => {
+  const game = request.game;
+
+  game.handle_events(request, response);
+});
+
+exports.router = router;
+exports.name = engine_name;
+exports.Game = TicTacToe;