Put add_client/remove_client and the various broadcast functions into Game

[empires-server] / tictactoe.js

diff --git a/tictactoe.js b/tictactoe.js
index 766c1e4ed569cf9d2efb52bae9e7d70ffc6ce6fa..4e76638a7cd3290df810eee00cd677c3af1ec0f8 100644 (file)
--- a/tictactoe.js
+++ b/tictactoe.js
@@ -1,13 +1,15 @@
 const express = require("express");
+const Game = require("./game.js");
 
-const app = express.Router();
+const engine_name = "tictactoe";
 
-class TicTacToe {
+const router = express.Router();
+
+class TicTacToe extends Game {
   constructor() {
+    super(engine_name);
     this.moves = [];
     this.board = Array(9).fill(null);
-    this.clients = [];
-    this.next_client_id = 1;
   }
 
   /* Returns Boolean indicating whether move was legal and added. */
@@ -22,39 +24,12 @@ class TicTacToe {
     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) => {
+router.get('/', (request, response) => {
   const game = request.game;
 
   if (! request.session.nickname)
@@ -63,7 +38,7 @@ app.get('/', (request, response) => {
     response.render('tictactoe-game.html');
 });
 
-app.post('/move', (request, response) => {
+router.post('/move', (request, response) => {
   const game = request.game;
   const square = request.body.square;
 
@@ -79,7 +54,7 @@ app.post('/move', (request, response) => {
   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. */
@@ -99,6 +74,6 @@ app.get('/events', (request, response) => {
   });
 });
 
-exports.app = app;
-exports.name = "tictactoe";
+exports.router = router;
+exports.name = engine_name;
 exports.Game = TicTacToe;