hipmi-mobile/utils/pickImage.ts

import * as ImagePicker from "expo-image-picker";
import { Alert } from "react-native";

// Daftar ekstensi yang diperbolehkan
const ALLOWED_EXTENSIONS = ["jpg", "jpeg", "png"];
const MAX_FILE_SIZE = 5 * 1024 * 1024; // 5MB

export default async function pickImage({setImageUri}: {setImageUri: (uri: string) => void}) {
  const { status } = await ImagePicker.requestMediaLibraryPermissionsAsync();
  if (status !== "granted") {
    Alert.alert(
      "Permission Denied",
      "You need to grant permission to access your media library"
    );
    return;
  }

  const result = await ImagePicker.launchImageLibraryAsync({
    mediaTypes: ImagePicker.MediaTypeOptions.Images,
    allowsEditing: true,
    aspect: [4, 3],
    quality: 1,
  });

  if (result.canceled || !result.assets[0]?.uri) {
    return;
  }

  const uri = result.assets[0].uri;
  const filename = uri.split("/").pop()?.toLowerCase() || "";
  const match = /\.(\w+)$/.exec(filename);
  const extension = match ? match[1] : "";

  // Validasi ekstensi
  if (!extension || !ALLOWED_EXTENSIONS.includes(extension)) {
    Alert.alert(
      "File Tidak Valid",
      "Hanya file JPG, JPEG, dan PNG yang diperbolehkan."
    );
    return;
  }

  // Opsional: Validasi ukuran file (jika metadata tersedia)
  // Catatan: Di Expo, `file.size` mungkin tidak tersedia di semua platform
  const asset = result.assets[0];
  if (asset.fileSize && asset.fileSize > MAX_FILE_SIZE) {
    Alert.alert("File Terlalu Besar", "Ukuran file maksimal adalah 5MB.");
    return;
  }

  // Jika lolos validasi, simpan URI
  setImageUri(uri);
}