feat(network): add local network auto-switch feature (#1334)

hooks/useWifiSSID.ts

@@ -0,0 +1,97 @@
+import * as Location from "expo-location";
+import { useCallback, useEffect, useState } from "react";
+import { getSSID } from "@/modules/wifi-ssid";
+
+export type PermissionStatus =
+  | "granted"
+  | "denied"
+  | "undetermined"
+  | "unavailable";
+
+export interface UseWifiSSIDReturn {
+  ssid: string | null;
+  permissionStatus: PermissionStatus;
+  requestPermission: () => Promise<boolean>;
+  isLoading: boolean;
+}
+
+function mapLocationStatus(
+  status: Location.PermissionStatus,
+): PermissionStatus {
+  switch (status) {
+    case Location.PermissionStatus.GRANTED:
+      return "granted";
+    case Location.PermissionStatus.DENIED:
+      return "denied";
+    default:
+      return "undetermined";
+  }
+}
+
+export function useWifiSSID(): UseWifiSSIDReturn {
+  const [ssid, setSSID] = useState<string | null>(null);
+  const [permissionStatus, setPermissionStatus] =
+    useState<PermissionStatus>("undetermined");
+  const [isLoading, setIsLoading] = useState(true);
+
+  const fetchSSID = useCallback(async () => {
+    const result = await getSSID();
+    console.log("[WiFi Debug] Native module SSID:", result);
+    setSSID(result);
+  }, []);
+
+  const requestPermission = useCallback(async (): Promise<boolean> => {
+    try {
+      const { status } = await Location.requestForegroundPermissionsAsync();
+      const newStatus = mapLocationStatus(status);
+      setPermissionStatus(newStatus);
+
+      if (newStatus === "granted") {
+        await fetchSSID();
+      }
+
+      return newStatus === "granted";
+    } catch {
+      setPermissionStatus("unavailable");
+      return false;
+    }
+  }, [fetchSSID]);
+
+  useEffect(() => {
+    async function initialize() {
+      setIsLoading(true);
+      try {
+        const { status } = await Location.getForegroundPermissionsAsync();
+        const mappedStatus = mapLocationStatus(status);
+        setPermissionStatus(mappedStatus);
+
+        if (mappedStatus === "granted") {
+          await fetchSSID();
+        }
+      } catch {
+        setPermissionStatus("unavailable");
+      }
+      setIsLoading(false);
+    }
+
+    initialize();
+  }, [fetchSSID]);
+
+  // Refresh SSID when permission status changes to granted
+  useEffect(() => {
+    if (permissionStatus === "granted") {
+      fetchSSID();
+
+      // Also set up an interval to periodically check SSID
+      const interval = setInterval(fetchSSID, 10000); // Check every 10 seconds
+      return () => clearInterval(interval);
+    }
+  }, [permissionStatus, fetchSSID]);
+
+  return {
+    ssid,
+    permissionStatus,
+    requestPermission,
+    isLoading,
+  };
+}