text: /**
   * Copyright 2018-present Facebook.
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   * @format
   */
  
  export type User = {
    name?: string,
    profile_picture?: {
      uri: string,
    },
  };
  
  export type State = User;
  
  export type Action =
    | {
        type: 'LOGIN',
        payload: User,
      }
    | {
        type: 'LOGOUT',
      };
  
  const INITIAL_STATE: State = {};
  
  export default function reducer(
    state: State = INITIAL_STATE,
    action: Action,
  ): State {
    if (action.type === 'LOGOUT') {
      return {};
    } else if (action.type === 'LOGIN') {
      return {
        ...state,
        ...action.payload,
      };
    } else {
      return state;
    }
  }
  
  export const login = (payload: User): Action => ({
    type: 'LOGIN',
    payload,
  });
  
  export const logout = (): Action => ({
    type: 'LOGOUT',
  });
  