From 1fc4f149440f7afaffe8cb9c25940198a68d69de Mon Sep 17 00:00:00 2001
From: Bart Akeley <bart.akeley@gmail.com>
Date: Sat, 9 Feb 2019 18:58:16 +0000
Subject: [PATCH] Resolve "Back button in login not allowed - no way to cancel"

---
 js/AuthManager.js     |  41 +++++++--
 js/apis/Auth0.js      |  36 +++++---
 js/pages/LoginPage.js | 206 +++++++++++++++++++++++++++++++++++++++---
 3 files changed, 254 insertions(+), 29 deletions(-)

diff --git a/js/AuthManager.js b/js/AuthManager.js
index 577b590..9d8d06d 100644
--- a/js/AuthManager.js
+++ b/js/AuthManager.js
@@ -1,8 +1,7 @@
 //@flow
-// import { authFacebook, type FacebookAuth } from './apis/FacebookAuth';
-import { type GoogleUser } from './apis/GoogleAuth';
-import { type Auth0User, loginAuth0 } from './apis/Auth0';
+import { type Auth0User, loginAuth0, createAuth0User, resetAuth0Password } from './apis/Auth0';
 import moment from 'moment';
+import { AsyncStorage } from 'react-native';
 
 export const AUTH_PROVIDER_FACEBOOK: 'facebook' = 'facebook';
 export const AUTH_PROVIDER_GOOGLE: 'google' = 'google';
@@ -50,21 +49,49 @@ class AuthManager {
 
 	setAuth0User = (auth0User: Auth0User) => {
 		if (!auth0User) {
+			this.setUser({});
 			return;
 		}
-		this.user = {
+
+		this.setUser({
 			token: auth0User.accessToken,
 			tokenExpires: +moment().add(auth0User.expiresIn, 'seconds'),
-		};
+		});
 	};
 
-	authenticate = async () => {
-		this.setAuth0User(await loginAuth0());
+	setUser = ({ token, tokenExpires }) => {
+		if (!token || +moment(tokenExpires) <= +moment()) {
+			this.user = null;
+			AsyncStorage.removeItem('user');
+		} else {
+			this.user = { token, tokenExpires };
+			AsyncStorage.setItem('user', JSON.stringify(this.user));
+		}
+	};
+
+	checkIsAuthed = async () => {
+		const user = JSON.parse(await AsyncStorage.getItem('user'));
+		if (user) {
+			this.setUser(user);
+			return this.user;
+		}
+	};
+
+	authenticate = async ({ email, password }) => {
+		this.setAuth0User(await loginAuth0({ email, password }));
 	};
 
 	deauthenticate = () => {
 		this.user = null;
 	};
+
+	createUser = async user => {
+		return createAuth0User(user);
+	};
+
+	resetPassword = () => {
+		return resetAuth0Password();
+	};
 }
 
 export default new AuthManager();
diff --git a/js/apis/Auth0.js b/js/apis/Auth0.js
index f22bea0..44e7b52 100644
--- a/js/apis/Auth0.js
+++ b/js/apis/Auth0.js
@@ -18,15 +18,29 @@ const getAuth0Instance = () => {
 	);
 };
 
-export const loginAuth0 = async (): Promise<?Auth0User> => {
-	try {
-		const creds = await getAuth0Instance().webAuth.authorize({
-			scope: 'openid profile email',
-			audience: 'https://aretherecookies.auth0.com/userinfo',
-		});
-		return creds;
-	} catch (error) {
-		console.log(error); //eslint-disable-line no-console
-		return null;
-	}
+export const loginAuth0 = async ({ email: username, password }): Promise<?Auth0User> => {
+	const creds = await getAuth0Instance().auth.passwordRealm({
+		username,
+		password,
+		realm: 'Username-Password-Authentication',
+	});
+	return creds;
+};
+
+export const createAuth0User = async ({ email, username, password }) => {
+	const creds = await getAuth0Instance().auth.createUser({
+		email,
+		username,
+		password,
+		connection: 'Username-Password-Authentication',
+	});
+	return creds;
+};
+
+export const resetAuth0Password = async () => {
+	const creds = await getAuth0Instance().webAuth.authorize({
+		scope: 'openid profile email',
+		audience: 'https://aretherecookies.auth0.com/userinfo',
+	});
+	return creds;
 };
diff --git a/js/pages/LoginPage.js b/js/pages/LoginPage.js
index f761279..7a1655a 100644
--- a/js/pages/LoginPage.js
+++ b/js/pages/LoginPage.js
@@ -1,15 +1,31 @@
 //@flow
 import React from 'react';
-import { View, Text } from 'react-native';
+import { View, Text, TextInput, Button, TouchableOpacity } from 'react-native';
 import { withHandlers, compose, withState, lifecycle } from 'recompose';
 import { withRouterContext } from '../enhancers/routeEnhancers';
 import AuthManager from '../AuthManager';
 import queryString from 'query-string';
+import theme from '../ui-theme';
+import { Divider, Icon } from 'react-native-material-ui';
+
+const auth0ErrToStr = message => {
+	if (typeof message === 'string') {
+		return message;
+	}
+
+	if (message && message.rules && message.rules.length > 0) {
+		return 'Password must be at least 8 characters and contain at least 1 letter, number, and symbol';
+	}
+};
 
 type Props = {
-	authUser: (provider: string) => () => Promise<void>,
+	authUser: () => void,
 	error: string,
 	setError: (err: string) => void,
+	email: string,
+	setEmail: string => void,
+	password: string,
+	setPassword: string => void,
 	router: {
 		route: {
 			location: {
@@ -24,15 +40,142 @@ type Props = {
 		},
 	},
 	deauthUser: () => void,
+	createUser: () => void,
+	isNewUser: boolean,
+	setIsNewUser: boolean => void,
+	username: string,
+	setUsername: string => void,
+	resetPassword: () => void,
 };
-const LoginPageComponent = ({ deauthUser, error, router }: Props) => {
+
+const LoginPageComponent = ({
+	authUser,
+	deauthUser,
+	error,
+	router,
+	email,
+	setEmail,
+	password,
+	setPassword,
+	createUser,
+	isNewUser,
+	setIsNewUser,
+	username,
+	setUsername,
+	resetPassword,
+}: Props) => {
 	if (/logout/.test(router.route.location.pathname)) {
 		deauthUser();
 		return null;
 	} else {
+		const submitTitle = isNewUser ? 'Continue' : 'Sign In';
+		const submitAction = isNewUser ? createUser : authUser;
+
 		return (
-			<View style={{ flexDirection: 'column', alignItems: 'center' }}>
-				{error && <Text>Login Failed! {error}</Text>}
+			<View
+				style={{
+					flex: 1,
+					flexDirection: 'column',
+					alignItems: 'center',
+					justifyContent: 'flex-start',
+					padding: 20,
+					borderWidth: 1,
+					borderColor: 'pink',
+				}}>
+				{error && <Text style={{ fontSize: 16, color: 'red', fontWeight: 'bold' }}>{error}</Text>}
+
+				<Text style={{ fontSize: 64, fontWeight: '600' }}>Sign In</Text>
+
+				<View style={{ flexDirection: 'row', marginTop: 20 }}>
+					<View style={{ flex: 1, flexDirection: 'column' }}>
+						<TextInput
+							editable={true}
+							value={email}
+							placeholder="Email"
+							onChangeText={setEmail}
+							style={{
+								fontSize: 18,
+							}}
+						/>
+						<Divider />
+					</View>
+				</View>
+
+				{isNewUser && (
+					<View style={{ flexDirection: 'row', marginTop: 20 }}>
+						<View style={{ flex: 1, flexDirection: 'column' }}>
+							<TextInput
+								editable={true}
+								value={username}
+								placeholder="Username"
+								onChangeText={setUsername}
+								style={{
+									fontSize: 18,
+								}}
+							/>
+							<Divider />
+						</View>
+					</View>
+				)}
+
+				<View style={{ flexDirection: 'row', marginTop: 20 }}>
+					<View style={{ flex: 1, flexDirection: 'column' }}>
+						<TextInput
+							editable={true}
+							secureTextEntry={true}
+							value={password}
+							placeholder="Password"
+							onChangeText={setPassword}
+							style={{
+								fontSize: 18,
+							}}
+						/>
+						<Divider />
+					</View>
+				</View>
+
+				<View style={{ flexDirection: 'row', marginTop: 20 }}>
+					<View style={{ flex: 1, flexDirection: 'column', paddingTop: 20 }}>
+						<Button title={submitTitle} onPress={submitAction} color={theme.palette.primaryColor} />
+					</View>
+				</View>
+
+				{!isNewUser && (
+					<TouchableOpacity
+						onPress={() => setIsNewUser(true)}
+						style={{ flexDirection: 'row', marginTop: 20, padding: 20 }}>
+						<Text
+							style={{
+								flex: 1,
+								textAlign: 'center',
+								fontSize: 16,
+								color: theme.palette.primaryColor,
+							}}>
+							Don't have an account? Sign up!
+						</Text>
+					</TouchableOpacity>
+				)}
+
+				<TouchableOpacity
+					onPress={resetPassword}
+					style={{
+						flexDirection: 'row',
+						marginTop: 0,
+						padding: 20,
+						alignItems: 'center',
+						justifyContent: 'center',
+					}}>
+					<Text
+						style={{
+							textAlign: 'center',
+							fontSize: 16,
+							color: theme.palette.primaryColor,
+							marginRight: 5,
+						}}>
+						Forgot your pasword?
+					</Text>
+					<Icon name="launch" color={theme.palette.primaryColor} size={18} />
+				</TouchableOpacity>
 			</View>
 		);
 	}
@@ -41,21 +184,62 @@ const LoginPageComponent = ({ deauthUser, error, router }: Props) => {
 export default compose(
 	withRouterContext,
 	withState('error', 'setError', null),
+	withState('email', 'setEmail', ''),
+	withState('password', 'setPassword', ''),
+	withState('username', 'setUsername', ''),
+	withState('isNewUser', 'setIsNewUser', false),
+	withHandlers({
+		checkAuth: ({ router }) => async () => {
+			const isLoggedIn = await AuthManager.checkIsAuthed();
+			if (isLoggedIn) {
+				const { returnto = '/list/food' } = queryString.parse(router.route.location.search);
+				router.history.replace(returnto);
+			}
+		},
+	}),
+	withHandlers({
+		authUser: ({ email, password, setError, checkAuth }) => async () => {
+			try {
+				setError(null);
+				await AuthManager.authenticate({ email, password });
+				checkAuth();
+			} catch (err) {
+				setError('Login Failed! Please check the username and password and try again.');
+			}
+		},
+	}),
 	withHandlers({
 		deauthUser: ({ router: { history } }) => () => {
 			const { returnto = '/list/food' } = queryString.parse(history.location.search);
 			AuthManager.deauthenticate();
 			history.replace(returnto);
 		},
+		createUser: ({ email, password, username, setError, authUser }) => async () => {
+			if (!email || !password || !username) {
+				setError('Please provide username, email, and password and try again.');
+				return;
+			}
+
+			try {
+				setError(null);
+				await AuthManager.createUser({ email, password, username });
+				authUser({ email, password });
+			} catch (err) {
+				setError('Unable to create user: ' + auth0ErrToStr(err.message));
+			}
+		},
+		resetPassword: ({ setError, setIsNewUser }) => async () => {
+			try {
+				await AuthManager.resetPassword();
+				setIsNewUser(false);
+			} catch (error) {
+				setError('Password reset failed');
+			}
+		},
 	}),
 	lifecycle({
 		componentDidMount() {
-			const { returnto = '/list/food' } = queryString.parse(
-				this.props.router.route.location.search
-			);
-			if (!AuthManager.isLoggedIn()) {
-				AuthManager.authenticate('auth0').then(() => this.props.router.history.replace(returnto));
-			}
+			this.props.checkAuth();
 		},
 	})
 )(LoginPageComponent);