From 7b286806d07d73d85cad0d27ee3827810651eded Mon Sep 17 00:00:00 2001
From: cha0s <git@cha0s.io>
Date: Fri, 31 May 2024 08:33:11 -0500
Subject: [PATCH] feat: basic latency simulation

---
 src/constants.js         |  6 ++++++
 src/net/client/client.js | 12 +++++++++++-
 src/net/server/server.js | 16 +++++++++++++---
 3 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/src/constants.js b/src/constants.js
index d7d729a..9a53d81 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -1,8 +1,14 @@
+export const CLIENT_LATENCY = 100;
+
 export const RESOLUTION = [
   800,
   450,
 ];
 
+export const SERVER_LATENCY = 100;
+
+export const TPS = 60;
+
 export const ACTION_MAP = {
   w: 'moveUp',
   d: 'moveRight',
diff --git a/src/net/client/client.js b/src/net/client/client.js
index 067ce5e..5a6112c 100644
--- a/src/net/client/client.js
+++ b/src/net/client/client.js
@@ -1,3 +1,5 @@
+import {CLIENT_LATENCY} from '@/constants.js';
+
 import Packet from '../packet/packet.js';
 
 export default class Client {
@@ -20,6 +22,14 @@ export default class Client {
     }
   }
   send(packet) {
-    this.transmit(Packet.transmit(packet));
+    if (CLIENT_LATENCY > 0) {
+      setTimeout(() => {
+        this.transmit(Packet.transmit(packet));
+      }, CLIENT_LATENCY);
+    }
+    else {
+      this.transmit(Packet.transmit(packet));
+    }
+
   }
 }
diff --git a/src/net/server/server.js b/src/net/server/server.js
index 3d388a8..68a63dd 100644
--- a/src/net/server/server.js
+++ b/src/net/server/server.js
@@ -1,10 +1,13 @@
-import {MOVE_MAP} from '@/constants.js';
+import {
+  MOVE_MAP,
+  SERVER_LATENCY,
+  TPS,
+} from '@/constants.js';
 import Cell from '@/cell.js';
 import {System} from '@/ecs/index.js';
 import Packet from "../packet/packet.js";
 
 const SPEED = 100;
-const TPS = 60;
 
 await import ('@/isomorphinit.js');
 
@@ -82,7 +85,14 @@ export default class Server {
   }
 
   send(connection, packet) {
-    this.transmit(connection, Packet.transmit(packet));
+    if (SERVER_LATENCY > 0) {
+      setTimeout(() => {
+        this.transmit(connection, Packet.transmit(packet));
+      }, SERVER_LATENCY);
+    }
+    else {
+      this.transmit(connection, Packet.transmit(packet));
+    }
   }
 
   start() {