react-native-camera-roll/src/useCameraRoll.ts

import {useRef, useState} from 'react';
import type {
  GetPhotosParams,
  PhotoIdentifiersPage,
  SaveToCameraRollOptions,
} from './CameraRoll';
import {CameraRoll} from './CameraRoll';

const initialState: PhotoIdentifiersPage = {
  edges: [],
  page_info: {
    end_cursor: '',
    has_next_page: false,
    start_cursor: '',
  },
};

const defaultConfig: GetPhotosParams = {
  first: 20,
  groupTypes: 'All',
};

type UseCameraRollResult = [
  PhotoIdentifiersPage,
  (config?: GetPhotosParams) => Promise<void>,
  (tag: string, options?: SaveToCameraRollOptions) => Promise<void>,
];

export function useCameraRoll(): UseCameraRollResult {
  const [photos, setPhotos] = useState<PhotoIdentifiersPage>(initialState);

  const getPhotos = useRef(
    async (config: GetPhotosParams = defaultConfig): Promise<void> => {
      try {
        const result = await CameraRoll.getPhotos(config);
        setPhotos(result);
      } catch (error) {
        if (__DEV__)
          console.log('[useCameraRoll] Error getting photos: ', error);
      }
    },
  ).current;

  const save = useRef(
    async (...args: Parameters<typeof CameraRoll.save>): Promise<void> => {
      try {
        await CameraRoll.save(...args);
      } catch (error) {
        if (__DEV__)
          console.log('[useCameraRoll] Error saving to camera roll: ', error);
      }
    },
  ).current;

  return [photos, getPhotos, save];
}