static-cms/packages/netlify-cms-core/src/actions/auth.js

import { actions as notifActions } from 'redux-notifications';
import { currentBackend } from 'src/backend';

const { notifSend } = notifActions;

export const AUTH_REQUEST = 'AUTH_REQUEST';
export const AUTH_SUCCESS = 'AUTH_SUCCESS';
export const AUTH_FAILURE = 'AUTH_FAILURE';
export const AUTH_REQUEST_DONE = 'AUTH_REQUEST_DONE';
export const LOGOUT = 'LOGOUT';

export function authenticating() {
  return {
    type: AUTH_REQUEST,
  };
}

export function authenticate(userData) {
  return {
    type: AUTH_SUCCESS,
    payload: userData,
  };
}

export function authError(error) {
  return {
    type: AUTH_FAILURE,
    error: 'Failed to authenticate',
    payload: error,
  };
}

export function doneAuthenticating() {
  return {
    type: AUTH_REQUEST_DONE,
  };
}

export function logout() {
  return {
    type: LOGOUT,
  };
}

// Check if user data token is cached and is valid
export function authenticateUser() {
  return (dispatch, getState) => {
    const state = getState();
    const backend = currentBackend(state.config);
    dispatch(authenticating());
    return backend
      .currentUser()
      .then(user => {
        if (user) {
          dispatch(authenticate(user));
        } else {
          dispatch(doneAuthenticating());
        }
      })
      .catch(error => {
        dispatch(authError(error));
        dispatch(logoutUser());
      });
  };
}

export function loginUser(credentials) {
  return (dispatch, getState) => {
    const state = getState();
    const backend = currentBackend(state.config);

    dispatch(authenticating());
    return backend
      .authenticate(credentials)
      .then(user => {
        dispatch(authenticate(user));
      })
      .catch(error => {
        console.error(error);
        dispatch(
          notifSend({
            message: {
              details: error.message,
              key: 'ui.toast.onFailToAuth',
            },
            kind: 'warning',
            dismissAfter: 8000,
          }),
        );
        dispatch(authError(error));
      });
  };
}

export function logoutUser() {
  return (dispatch, getState) => {
    const state = getState();
    const backend = currentBackend(state.config);
    Promise.resolve(backend.logout()).then(() => {
      dispatch(logout());
    });
  };
}