From 386e8c3ed1b24a7d837c8b86c4a2447f11299209 Mon Sep 17 00:00:00 2001
From: Jack Hadrill <jack@hadrill.co.uk>
Date: Tue, 19 Nov 2024 23:15:50 +0000
Subject: [PATCH] Add get history message

---
 src/common.ts           |  2 +-
 src/mapping.ts          | 11 +++--------
 src/messages/history.ts | 16 ++++++++++++++++
 3 files changed, 20 insertions(+), 9 deletions(-)
 create mode 100644 src/messages/history.ts

diff --git a/src/common.ts b/src/common.ts
index 0ae31ed..db9e257 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -8,5 +8,5 @@ export enum MessageTypes {
   UserDataRequest = 0x0002,
   UserDataResponse = 0x0003,
   Keepalive = 0x0005,
-  Unsubscribe = 0xFFFF
+  GetHistory = 0xfffe,
 }
diff --git a/src/mapping.ts b/src/mapping.ts
index 8f0b4b7..8f44360 100644
--- a/src/mapping.ts
+++ b/src/mapping.ts
@@ -1,9 +1,4 @@
-import { packSubscribeMessage } from './messages/subscribe'
-import { packBasicMessage, unpackBasicMessage } from './messages/basic'
-import { packUserDataRequestMessage, unpackUserDataRequestMessage } from './messages/userDataRequest'
-import { packUserDataResponseMessage, unpackUserDataResponseMessage } from './messages/userDataResponse'
-import { packKeepaliveMessage } from './messages/keepalive'
-import { packUnsubscribeMessage } from './messages/unsubscribe'
+import { packGetHistoryMessage } from "./messages/history";
 
 export const packers = {
   0x0000: packSubscribeMessage,
@@ -11,8 +6,8 @@ export const packers = {
   0x0002: packUserDataRequestMessage,
   0x0003: packUserDataResponseMessage,
   0x0005: packKeepaliveMessage,
-  0xffff: packUnsubscribeMessage
-}
+  0xfffe: packGetHistoryMessage,
+  0xffff: packUnsubscribeMessage,
 
 export const unpackers = {
   0x0001: unpackBasicMessage,
diff --git a/src/messages/history.ts b/src/messages/history.ts
new file mode 100644
index 0000000..30dd6d9
--- /dev/null
+++ b/src/messages/history.ts
@@ -0,0 +1,16 @@
+import { MessageTypes } from "../common";
+import { numberToUint16BE } from "../utilities/number";
+import { packOutgoingPacket } from "./packet";
+
+const MESSAGE_TYPE = numberToUint16BE(MessageTypes.Keepalive);
+
+/**
+ * Create an outgoing keepalive (0x0005) packet.
+ * @returns An outgoing keepalive (0x0005) packet.
+ */
+export function packGetHistoryMessage(): Uint8Array {
+  return packOutgoingPacket({
+    messageType: MESSAGE_TYPE,
+    data: new Uint8Array(0),
+  });
+}