user reducer

Reviewed By: jknoxville

Differential Revision: D14224403

fbshipit-source-id: 8341dd8af03148c4b1f648641bda522804acb22d

src/dispatcher/index.js

@@ -13,6 +13,7 @@ import tracking from './tracking';
 import server from './server';
 import notifications from './notifications';
 import plugins from './plugins';
+import user from './user';
 
 import type {Logger} from '../fb-interfaces/Logger.js';
 import type {Store} from '../reducers/index.js';
@@ -27,4 +28,5 @@ export default (store: Store, logger: Logger) =>
     server,
     notifications,
     plugins,
+    user,
   ].forEach(fn => fn(store, logger));

src/dispatcher/user.js

@@ -0,0 +1,27 @@
+/**
+ * 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
+ */
+
+import type {Store} from '../reducers/index.js';
+import type {Logger} from '../fb-interfaces/Logger.js';
+import {login} from '../reducers/user';
+import {getUser, logoutUser} from '../fb-stubs/user';
+
+export default (store: Store, logger: Logger) => {
+  getUser()
+    .then(user => {
+      store.dispatch(login(user));
+    })
+    .catch(console.debug);
+
+  let prevUserName = store.getState().user.name;
+  store.subscribe(() => {
+    if (prevUserName && !store.getState().user.name) {
+      logoutUser();
+    }
+    prevUserName = store.getState().user.name;
+  });
+};

src/fb-stubs/user.js

@@ -0,0 +1,18 @@
+/**
+ * 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 function getUser() {
+  return Promise.reject();
+}
+
+export async function graphQLQuery(query: string) {
+  return Promise.reject();
+}
+
+export function logoutUser(): Promise<void> {
+  return Promise.reject();
+}

src/reducers/__tests__/user.node.js

@@ -0,0 +1,24 @@
+/**
+ * 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
+ */
+
+import {default as reducer, login, logout} from '../user';
+
+test('login', () => {
+  const userData = {username: 'Jane Doe'};
+  const res = reducer({}, login(userData));
+  expect(res).toEqual(userData);
+});
+
+test('logout', () => {
+  const res = reducer(
+    {
+      username: 'Jane Doe',
+    },
+    logout(),
+  );
+  expect(res).toEqual({});
+});

src/reducers/index.js

@@ -11,6 +11,7 @@ import connections from './connections.js';
 import pluginStates from './pluginStates.js';
 import notifications from './notifications.js';
 import plugins from './plugins.js';
+import user from './user.js';
 
 import {persistReducer} from 'redux-persist';
 import storage from 'redux-persist/lib/storage/index.js';
@@ -35,6 +36,7 @@ import type {
   State as PluginsState,
   Action as PluginsAction,
 } from './plugins.js';
+import type {State as UserState, Action as UserAction} from './user.js';
 import type {Store as ReduxStore} from 'redux';
 
 type Actions =
@@ -43,6 +45,7 @@ type Actions =
   | PluginStatesAction
   | NotificationsAction
   | PluginsAction
+  | UserAction
   | {|type: 'INIT'|};
 
 export type State = {|
@@ -51,6 +54,7 @@ export type State = {|
   pluginStates: PluginStatesState,
   notifications: NotificationsState,
   plugins: PluginsState,
+  user: UserState,
 |};
 
 export type Store = ReduxStore<State, Actions>;
@@ -79,4 +83,11 @@ export default combineReducers<_, Actions>({
     notifications,
   ),
   plugins,
+  user: persistReducer(
+    {
+      key: 'user',
+      storage,
+    },
+    user,
+  ),
 });

src/reducers/user.js

@@ -0,0 +1,51 @@
+/**
+ * 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',
+});