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App.js
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import { NavigationContainer } from "@react-navigation/native";
import { createNativeStackNavigator } from "@react-navigation/native-stack";
import { StatusBar } from "expo-status-bar";
import AppLoading from "expo-app-loading";
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 { useContext, useEffect, useState } from "react";
import IconButton from "./components/ui/IconButton";
import AsyncStorage from "@react-native-async-storage/async-storage";
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 ? <AuthenticatedStack /> : <AuthStack />}
</NavigationContainer>
);
}
function Root() {
const [isTryingLogin, setIsTryingLogin] = useState(true);
const authCtx = useContext(AuthContext);
useEffect(() => {
async function fetchToken() {
const storedToken = await AsyncStorage.getItem("token");
if (storedToken) {
authCtx.authenticate(storedToken);
}
setIsTryingLogin(false);
}
fetchToken();
}, []);
return isTryingLogin ? <AppLoading /> : <Navigation />;
}
export default function App() {
return (
<>
<StatusBar style="light" />
<AuthContextProvider>
<Root />
</AuthContextProvider>
</>
);
}