Initial commit

src/main/games/gsi-server.ts

@@ -0,0 +1,73 @@
+import { createServer, type IncomingMessage, type Server, type ServerResponse } from 'node:http'
+
+export type GsiHandler = (payload: unknown, headers: Record<string, string | string[] | undefined>) => void
+
+const PORT = 4701
+
+let server: Server | null = null
+const handlers: Map<string, GsiHandler> = new Map()
+
+function getBody(req: IncomingMessage): Promise<Buffer> {
+  return new Promise((resolve, reject) => {
+    const chunks: Buffer[] = []
+    req.on('data', (c) => chunks.push(c as Buffer))
+    req.on('end', () => resolve(Buffer.concat(chunks)))
+    req.on('error', reject)
+  })
+}
+
+async function onRequest(req: IncomingMessage, res: ServerResponse): Promise<void> {
+  const route = (req.url ?? '/').split('?')[0]
+  const handler = handlers.get(route)
+  if (!handler) {
+    res.statusCode = 404
+    res.end()
+    return
+  }
+  if (req.method !== 'POST') {
+    res.statusCode = 405
+    res.end()
+    return
+  }
+  try {
+    const body = await getBody(req)
+    const text = body.toString('utf-8')
+    const payload = text.length > 0 ? JSON.parse(text) : {}
+    handler(payload, req.headers)
+    res.statusCode = 200
+    res.setHeader('Content-Type', 'text/plain')
+    res.end('ok')
+  } catch (err) {
+    res.statusCode = 500
+    res.end(String(err))
+  }
+}
+
+export async function startGsiServer(): Promise<void> {
+  if (server) return
+  await new Promise<void>((resolve, reject) => {
+    server = createServer(onRequest)
+    server.once('error', reject)
+    server.listen(PORT, '127.0.0.1', () => resolve())
+  })
+}
+
+export function stopGsiServer(): void {
+  if (server) {
+    server.close()
+    server = null
+  }
+}
+
+export function registerGsiRoute(route: string, handler: GsiHandler): () => void {
+  handlers.set(route, handler)
+  return () => handlers.delete(route)
+}
+
+export function getGsiBaseUrl(): string {
+  return `http://127.0.0.1:${PORT}`
+}
+
+export function getGsiPort(): number {
+  return PORT
+}