game: Send a game-info event when a client connects

[lmno-server] / game.js

diff --git a/game.js b/game.js
index fb2d75afa87214f1eaa4fe426772ca59f39e24f3..56ee56c8fa5e013991f676abfbbd8b51889994ff 100644 (file)
--- a/game.js
+++ b/game.js
@@ -1,8 +1,12 @@
 /* Base class providing common code for game engine implementations. */
 class Game {
-  constructor() {
+  constructor(id) {
+    this.id = id;
     this.clients = [];
     this.next_client_id = 1;
+
+    /* Send a comment to every connected client every 15 seconds. */
+    setInterval(() => {this.broadcast_string(":");}, 15000);
   }
 
   /* Suport for game meta-data.
@@ -68,6 +72,24 @@ class Game {
     request.on('close', () => {
       this.remove_client(id);
     });
+
+    /* Give the client the game-info event. */
+    const game_info_json = JSON.stringify({
+      id: this.id,
+      url: `${request.protocol}://${request.hostname}/${this.id}`
+    });
+    response.write(`event: game-info\ndata: ${game_info_json}\n\n`);
+
+    /* Finally, if this game class has a "state" property, stream that
+     * current state to the client. */
+    if (this.state) {
+      const state_json = JSON.stringify(this.state);
+      response.write(`event: game-state\ndata: ${state_json}\n\n`);
+    }
+  }
+
+  broadcast_move(move) {
+    this.broadcast_event("move", move);
   }
 
 }