Migrate from socket.io

Reviewed By: passy

Differential Revision: D34787674

fbshipit-source-id: 63d7c166ea29d14c96f0646a045e3f6fa93472e2

desktop/flipper-common/src/index.tsx

@@ -54,3 +54,4 @@ export * from './settings';
 export * from './PluginDetails';
 export * from './doctor';
 export * from './ServerAddOn';
+export * from './transport';

desktop/flipper-common/src/transport.tsx

@@ -0,0 +1,49 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {FlipperServerCommands, FlipperServerEvents} from './server-types';
+
+type GenericWebSocketMessage<E = string, T = unknown> = {
+  event: E;
+  payload: T;
+};
+
+export type ExecWebSocketMessage = GenericWebSocketMessage<
+  'exec',
+  {
+    [K in keyof FlipperServerCommands]: {
+      id: number;
+      command: K;
+      args: Parameters<FlipperServerCommands[K]>;
+    };
+  }[keyof FlipperServerCommands]
+>;
+
+export type ExecResponseWebSocketMessage = GenericWebSocketMessage<
+  'exec-response',
+  {id: number; data: unknown}
+>;
+
+export type ExecResponseErrorWebSocketMessage = GenericWebSocketMessage<
+  'exec-response-error',
+  {id: number; data: unknown}
+>;
+
+export type ServerEventWebSocketMessage = GenericWebSocketMessage<
+  'server-event',
+  {
+    [K in keyof FlipperServerEvents]: {event: K; data: FlipperServerEvents[K]};
+  }[keyof FlipperServerEvents]
+>;
+
+export type ClientWebSocketMessage = ExecWebSocketMessage;
+export type ServerWebSocketMessage =
+  | ExecResponseWebSocketMessage
+  | ExecResponseErrorWebSocketMessage
+  | ServerEventWebSocketMessage;