test: Add simple testing for tictactoe as well

[empires-server] / game.js

diff --git a/game.js b/game.js
index 028c0393f9be02ac027922fa6b9244d70380608e..20cd2411e2275ff8aef51e1c35a3772931815b6b 100644 (file)
--- a/game.js
+++ b/game.js
@@ -2,7 +2,55 @@
 class Game {
   constructor(name) {
     this.name = name;
+    this.clients = [];
+    this.next_client_id = 1;
   }
+
+  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`);
+  }
+
+  handle_events(request, response) {
+    /* 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 = this.add_client(response);
+
+    /* And queue up cleanup to be triggered on client close. */
+    request.on('close', () => {
+      this.remove_client(id);
+    });
+  }
+
 }
 
 module.exports = Game;