feat: save ECS

app/engine/engine.js

@@ -22,6 +22,8 @@ export default class Engine {
 
   frame = 0;
 
+  handle;
+
   last = Date.now();
 
   server;
@@ -97,11 +99,7 @@ export default class Engine {
         System.active = true;
       }
     });
-    const view = Ecs.serialize(ecs);
-    await this.server.writeData(
-      join('homesteads', `${id}`),
-      view,
-    );
+    this.saveEcs(join('homesteads', `${id}`), ecs);
   }
 
   async createPlayer(id) {
@@ -167,6 +165,19 @@ export default class Engine {
     return JSON.parse((new TextDecoder()).decode(buffer));
   }
 
+  async saveEcs(path, ecs) {
+    const view = Ecs.serialize(ecs);
+    await this.server.writeData(path, view);
+  }
+
+  async saveEcses() {
+    const promises = []
+    for (const i in this.ecses) {
+      promises.push(this.saveEcs(i, this.ecses[i]));
+    }
+    await Promise.all(promises);
+  }
+
   async savePlayer(id, entity) {
     const encoder = new TextEncoder();
     const buffer = encoder.encode(JSON.stringify(entity.toJSON()));
@@ -174,7 +185,7 @@ export default class Engine {
   }
 
   start() {
-    return setInterval(() => {
+    this.handle = setInterval(() => {
       const elapsed = (Date.now() - this.last) / 1000;
       this.last = Date.now();
       this.tick(elapsed);
@@ -183,6 +194,11 @@ export default class Engine {
     }, 1000 / TPS);
   }
 
+  stop() {
+    clearInterval(this.handle);
+    this.handle = undefined;
+  }
+
   tick(elapsed) {
     for (const i in this.ecses) {
       this.ecses[i].setClean();

app/net/server/worker.js

@@ -32,7 +32,9 @@ const engine = new Engine(WorkerServer);
 
 onmessage = async (event) => {
   if (0 === event.data) {
+    engine.stop();
     await engine.disconnectPlayer(0, 0);
+    await engine.saveEcses();
     postMessage(0);
     return;
   }