Incorporate empires.js as a sub-app within lmno.js

[lmno-server] / lmno.js

diff --git a/lmno.js b/lmno.js
index dc23fc2556651626905bae6f10a47cf5fe227c3f..f79da3afd653cf1d7b89219aada1546d97aff036 100644 (file)
--- a/lmno.js
+++ b/lmno.js
@@ -5,6 +5,9 @@ const body_parser = require("body-parser");
 const app = express();
 app.use(cors());
 
+/* Load each of our game mini-apps. */
+var empires = require("./empires");
+
 class LMNO {
   constructor() {
     this.ids = {};
@@ -19,14 +22,15 @@ class LMNO {
       var id = this.generate_id();
     } while (id in this.ids);
 
-    const game = {
+    const game = new empires.Game();
+
+    this.ids[id] = {
        id: id,
        engine: engine,
+       game: game
     };
 
-    this.ids[id] = game;
-
-    return game;
+    return id;
   }
 }
 
@@ -44,10 +48,40 @@ const lmno = new LMNO();
 
 app.post('/new/:game_engine', (request, response) =>  {
   const game_engine = request.params.game_engine;
-  const game = lmno.create_game(game_engine);
-  response.send(JSON.stringify(game.id));
+  const game_id = lmno.create_game(game_engine);
+  response.send(JSON.stringify(game_id));
 });
 
+/* Redirect any requests to a game ID at the top-level.
+ *
+ * Specifically, after obtaining the game ID (from the path) we simply
+ * lookup the game engine for the corresponding game and then redirect
+ * to the engine- and game-specific path.
+ */
+app.get('/[a-zA-Z0-9]{4}', (request, response) => {
+  const game_id = request.path.replace(/\//g, "");
+
+  const game = lmno.ids[game_id];
+  if (game === undefined) {
+      response.sendStatus(404);
+      return;
+  }
+  response.redirect(301, `/${game.engine}/${game.id}/`);
+});
+
+/* LMNO middleware to lookup the game. */
+app.use('/empires/:game_id([a-zA-Z0-9]{4})', (request, response, next) => {
+  request.game = lmno.ids[request.params.game_id].game;
+  if (request.game === undefined) {
+    response.sendStatus(404);
+    return;
+  }
+  next();
+});
+
+/* Mount sub apps. only _after_ we have done all the middleware we need. */
+app.use('/empires/[a-zA-Z0-9]{4}/', empires.app);
+
 app.listen(4000, function () {
   console.log('LMNO server listening on localhost:4000');
 });