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App.js
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App.js
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import { useContext, useEffect, useState } from 'react';
import { NavigationContainer } from '@react-navigation/native';
import { createNativeStackNavigator } from '@react-navigation/native-stack';
import { StatusBar } from 'expo-status-bar';
import AsyncStorage from '@react-native-async-storage/async-storage';
import * as SplashScreen from 'expo-splash-screen';
import LoginScreen from './screens/LoginScreen';
import SignupScreen from './screens/SignupScreen';
import WelcomeScreen from './screens/WelcomeScreen';
import { Colors } from './constants/styles';
import AuthContextProvider, { AuthContext } from './store/auth-context';
import IconButton from './components/ui/IconButton';
const Stack = createNativeStackNavigator();
function AuthStack() {
return (
<Stack.Navigator
screenOptions={{
headerStyle: { backgroundColor: Colors.primary500 },
headerTintColor: 'white',
contentStyle: { backgroundColor: Colors.primary100 },
}}
>
<Stack.Screen name="Login" component={LoginScreen} />
<Stack.Screen name="Signup" component={SignupScreen} />
</Stack.Navigator>
);
}
function AuthenticatedStack() {
const authCtx = useContext(AuthContext);
return (
<Stack.Navigator
screenOptions={{
headerStyle: { backgroundColor: Colors.primary500 },
headerTintColor: 'white',
contentStyle: { backgroundColor: Colors.primary100 },
}}
>
<Stack.Screen
name="Welcome"
component={WelcomeScreen}
options={{
headerRight: ({ tintColor }) => (
<IconButton
icon="exit"
color={tintColor}
size={24}
onPress={authCtx.logout}
/>
),
}}
/>
</Stack.Navigator>
);
}
function Navigation() {
const authCtx = useContext(AuthContext);
return (
<NavigationContainer>
{!authCtx.isAuthenticated && <AuthStack />}
{authCtx.isAuthenticated && <AuthenticatedStack />}
</NavigationContainer>
);
}
function Root() {
const [isTryingLogin, setIsTryingLogin] = useState(true);
const authCtx = useContext(AuthContext);
useEffect(() => {
async function fetchToken() {
await SplashScreen.preventAutoHideAsync();
const storedToken = await AsyncStorage.getItem('token');
if (storedToken) {
authCtx.authenticate(storedToken);
}
setIsTryingLogin(false);
await SplashScreen.hideAsync();
}
fetchToken();
}, []);
if (isTryingLogin) {
return null;
}
return <Navigation />;
}
export default function App() {
return (
<>
<StatusBar style="light" />
<AuthContextProvider>
<Root />
</AuthContextProvider>
</>
);
}