Add function to clean up and save the games to disk on exit

src/main.ts

@@ -18,6 +18,18 @@ import { InvestigateAffiliation } from "./events/special/InvestigateLoyalty/Inve
 export var active_games: {[key: string]: Game} = {};
 
 const db_dir = `data`;
+
+/**
+ * This function is called whenever the main node process is terminated for
+ * whatever reason. It cleans up and writes all the active games to the disk.
+ */
+function clean_up() {
+	for (var code in active_games) {
+		console.log(`Writing game: ${code} to disk`);
+		writeFileSync(`${db_dir}/${code}`, active_games[code].toJSON());
+	};
+	console.log(`Finished saving games to disk.`);
+}
 const io = sio.listen(3000);
 
 io.on(`connection`, (socket: sio.Socket) => {