From 415823a980f3bf1de2ba81e9e49a1a981189c18c Mon Sep 17 00:00:00 2001
From: Lncvrt <lncvrtreal@gmail.com>
Date: Sat, 8 Nov 2025 19:29:11 -0700
Subject: [PATCH] `/can-load-client` endpoint

---
 src/index.ts                  |  2 ++
 src/info/general.ts           |  5 +++++
 src/lib/util.ts               | 23 +++++++++++++++++++++++
 src/routes/can-load-client.ts | 24 ++++++++++++++++++++++++
 4 files changed, 54 insertions(+)
 create mode 100644 src/info/general.ts
 create mode 100644 src/routes/can-load-client.ts

diff --git a/src/index.ts b/src/index.ts
index ba5f661..c555f1d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,6 +3,7 @@ import { cors } from '@elysiajs/cors'
 import { jsonResponse } from './lib/util'
 import dotenv from 'dotenv'
 
+import { handler as canLoadClientHandler } from './routes/can-load-client'
 import { handler as launcherVersionsHandler } from './routes/launcher/versions'
 import { handler as launcherLatestHandler } from './routes/launcher/latest'
 import { handler as launcherLoaderLatestHandler } from './routes/launcher/loader/latest'
@@ -17,6 +18,7 @@ const app = new Elysia().use(
   })
 )
 
+app.get('/can-load-client', context => canLoadClientHandler(context))
 app.get('/launcher/versions', context => launcherVersionsHandler(context))
 app.get('/launcher/latest', launcherLatestHandler)
 app.get('/launcher/loader/latest', launcherLoaderLatestHandler)
diff --git a/src/info/general.ts b/src/info/general.ts
new file mode 100644
index 0000000..ce41dc5
--- /dev/null
+++ b/src/info/general.ts
@@ -0,0 +1,5 @@
+export const latestVersion = '1.8.3'
+export const latestBetaVersion = latestVersion
+export const latestLauncherLoaderVersion = '1.0.1'
+export const allowedVersions = [latestVersion, latestBetaVersion]
+export const allowedDatabaseVersions = [latestVersion, latestBetaVersion]
diff --git a/src/lib/util.ts b/src/lib/util.ts
index d7fafdc..a785410 100644
--- a/src/lib/util.ts
+++ b/src/lib/util.ts
@@ -1,5 +1,11 @@
 import mysql from 'mysql2'
 import { drizzle } from 'drizzle-orm/mysql2'
+import {
+  allowedDatabaseVersions,
+  allowedVersions,
+  latestBetaVersion,
+  latestVersion
+} from '../info/general'
 
 export function jsonResponse (data: any, status = 200) {
   return new Response(JSON.stringify(data, null, 2), {
@@ -20,3 +26,20 @@ export function getDatabaseConnection () {
 
   return { connection, db }
 }
+
+export const isLatestVersion = (version: string) => version === latestVersion
+
+export const isBetaVersion = (version: string) => version === latestBetaVersion
+
+export const isAllowedVersion = (version: string) =>
+  allowedVersions.includes(version)
+
+export const isAllowedDatabaseVersion = (version: string) =>
+  allowedDatabaseVersions.includes(version)
+
+export const checkClientDatabaseVersion = (request: Request) => {
+  const requester = request.headers.get('http_requester') ?? ''
+  const clientVersion = request.headers.get('http_clientversion') ?? ''
+  if (requester !== 'BerryDashClient') return '-998'
+  if (!allowedDatabaseVersions.includes(clientVersion)) return '-998'
+}
diff --git a/src/routes/can-load-client.ts b/src/routes/can-load-client.ts
new file mode 100644
index 0000000..75db5a9
--- /dev/null
+++ b/src/routes/can-load-client.ts
@@ -0,0 +1,24 @@
+import { Context } from 'elysia'
+import {
+  isAllowedDatabaseVersion,
+  isAllowedVersion,
+  isBetaVersion,
+  isLatestVersion
+} from '../lib/util'
+
+export async function handler ({ request, set }: Context) {
+  set.headers['Content-Type'] = 'text/plain'
+  const requester = request.headers.get('Requester') ?? '0'
+  const clientVersion = request.headers.get('ClientVersion') ?? '0'
+
+  if (requester === 'BerryDashGodotClient') return 'all;1.0.0'
+  else if (isLatestVersion(clientVersion)) return '1'
+  else if (isBetaVersion(clientVersion)) return '4'
+  else if (
+    isAllowedVersion(clientVersion) &&
+    isAllowedDatabaseVersion(clientVersion)
+  )
+    return '2'
+  else if (isAllowedVersion(clientVersion)) return '3'
+  return '-1'
+}