重构应用程序架构，添加 OpenIM SDK 初始化和引导逻辑

features/im/openim-bootstrap.ts

@@ -0,0 +1,38 @@
+import OpenIMSDK, { MessageItem } from "@openim/rn-client-sdk";
+import RNFS from "react-native-fs";
+
+const OPENIM_DIR = `${RNFS.DocumentDirectoryPath}/openim`;
+
+let initialized = false;
+let ensureDirPromise: Promise<void> | null = null;
+
+function ensureOpenIMDir() {
+  if (!ensureDirPromise) {
+    ensureDirPromise = RNFS.mkdir(OPENIM_DIR).then(() => undefined);
+  }
+
+  return ensureDirPromise;
+}
+
+export async function bootstrapOpenIM() {
+  if (initialized) {
+    return;
+  }
+
+  await ensureOpenIMDir();
+
+  OpenIMSDK.initSDK({
+    apiAddr: "https://openim-api.riwsan.com/api",
+    wsAddr: "wss://openim-api.riwsan.com/msg_gateway",
+    dataDir: OPENIM_DIR,
+    logFilePath: OPENIM_DIR,
+    logLevel: 5,
+    isLogStandardOutput: true,
+  });
+
+  OpenIMSDK.on("onRecvNewMessages", (messages: MessageItem[]) => {
+    console.log("onRecvNewMessages", messages);
+  });
+
+  initialized = true;
+}