mobile/src/lib/storage.js

import { AsyncStorage } from 'react-native';

export default class Storage {

  static async getItem(key) {
    try {
      return AsyncStorage.getItem(key);
    } catch (error) {
      console.log("Error getting item", error);
      return null;
    }
  }

  static async getMultiItems(keys) {
    return AsyncStorage.multiGet(keys).then((stores) => {
      var items = {};
      stores.map((result, i, store) => {
        let key = store[i][0];
        let value = store[i][1];
        items[key] = value;
      });
      return items;
    });
  }

  static async setItem(key, value) {
    if(value == null || value == undefined || key == null || key == undefined) {
      return;
    }
    try {
      return AsyncStorage.setItem(key, value);
    } catch (error) {
      console.log("Error setting item", error);
      return null;
    }
  }

  static async removeItem(key) {
    return await AsyncStorage.removeItem(key);
  }

  static async clearKeys(keys) {
    return AsyncStorage.multiRemove(keys);
  }

  static async clear() {
    return AsyncStorage.clear();
  }
}