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App.js
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App.js
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import React, { useEffect } from "react";
import { View, ActivityIndicator, AsyncStorage } from 'react-native';
import { NavigationContainer } from '@react-navigation/native';
import { createDrawerNavigator } from '@react-navigation/drawer';
import { AuthContext } from './components/Context';
import { getDateTime } from "./services/getDateTime";
import { getToken } from './services/token';
import AboutScreen from './screens/AboutScreen';
import MainTabScreen from './screens/MainTabScreen';
import DrawerContent from './screens/DrawerContent';
import RootStackScreen from "./screens/RootStackScreen";
const Drawer = createDrawerNavigator();
export default function() {
const initialLoginState = {
isLoading: true,
userName: null,
userToken: null,
};
loginReducer = (prevState, action) => {
switch( action.type ) {
case 'RETRIEVE_TOKEN':
return {
...prevState,
userToken: action.token,
isLoading: false,
};
case 'LOGIN':
return {
...prevState,
userName: action.id,
userToken: action.token,
isLoading: false,
};
case 'LOGOUT':
return {
...prevState,
userName: null,
userToken: null,
isLoading: false,
};
}
};
const [loginState, dispatch] = React.useReducer(loginReducer, initialLoginState);
const authContext = React.useMemo(() => ({
signIn: async(url, userName, password) => {
global.base_url = url;
var userToken;
var last_server_handshake_time;
userToken = null;
try{
// set usertoken
await getToken(url, userName, password);
await getDateTime();
userToken = global.bearer_token;
last_server_handshake_time = global.last_handshake_date_time;
await AsyncStorage.setItem('userToken', userToken);
await AsyncStorage.setItem('baseUrl', url);
await AsyncStorage.setItem('lastHandshake', last_server_handshake_time);
} catch (e){
console.log(e);
}
dispatch({type: 'LOGIN', id: userName, token: userToken });
},
signOut: async() => {
try{
await AsyncStorage.removeItem('userToken');
await AsyncStorage.removeItem('baseUrl');
await AsyncStorage.removeItem('lastHandshake');
}catch(e){
console.log(e);
}
dispatch({type: 'LOGOUT' });
},
}), []);
useEffect(() => {
setTimeout(async() => {
let userToken;
userToken = null;
try{
userToken = await AsyncStorage.getItem('userToken');
} catch(e) {
console.log(e);
}
dispatch({type: 'LOGIN', token: userToken });
}, 1000);
}, []);
if( loginState.isLoading ) {
return(
<View style={{flex:1, justifyContent:'center', alignItems:'center'}}>
<ActivityIndicator size='large' />
</View>
);
}
return (
<AuthContext.Provider value={authContext}>
<NavigationContainer>
{ loginState.userToken !== null ? (
<Drawer.Navigator drawerContent={props => <DrawerContent {...props} />}>
<Drawer.Screen name='HomeDrawer' component={MainTabScreen} />
<Drawer.Screen name='AboutScreen' component={AboutScreen}
options={{
headerLeft: () => (
<Icon.Button name="ios-menu" size={25}
backgroundColor="#c42c2c"
onPress={() => {props.navigation.navigate('Home')}}>
</Icon.Button>
)
}}/>
</Drawer.Navigator>
)
:
<RootStackScreen />
}
</NavigationContainer>
</AuthContext.Provider>
);
}