aloukissas

deleteUserCity = async () => {
  try {
    await AsyncStorage.removeItem("userCity");
  } catch (error) {
    console.log(`While removing userCity: ${error.message}`);
  }
}

aloukissas

getUserCity = async () => {
  try {
    return await AsyncStorage.getItem("userCity");
  catch (error) {
    console.log(`While getting userCity: ${error.message}`);
    return null;
  }
}

aloukissas

setUserCity = async (city) => {
  try {
    await AsyncStorage.setItem("userCity", city);
  } catch (error) {
    console.log(`While storing userCity: ${error.message}`);
  }
}

aloukissas

import React from "react";
import { View, Text, Platform } from "react-native";
import { Constants, Location, Permissions } from "expo";

class PermissionsExample extends React.Component {
  state = {
    message: null,
    location: null
  };
  

aloukissas

import React from "react";
import { View, Text } from "react-native";
import { Permissions } from "expo";

class PermissionsExample extends React.Component {
  state = {
    message: ""
  };
  
  async componentWillMount() {

aloukissas

import React from "react";
import { View, Text, StyleSheet, Button } from "react-native";
import { Auth } from "aws-amplify";
import { withAuthContext } from "../context";

class Home extends React.Component {
  handleLogout = async () => {
    await Auth.signOut();
    this.props.auth.setAuthenticated(false);
  };

aloukissas

import { withAuthContext } from "../context";

[...]
 
export default withAuthContext(Login);

aloukissas

handleSubmit = async () => {
  try {
    await Auth.signIn(this.state.email, this.state.password);
    this.props.auth.setAuthenticated(true);
  } catch (error) {
    Alert.alert("Error logging in", error, { text: "OK" });
  }
};

aloukissas

render() {
  const RootNavigator = createRootNavigator(this.state.isAuthenticated);
  const AppContainer = createAppContainer(RootNavigator);

  return (
    <AuthContext.Provider
      value={{
        isAuthenticated: this.state.isAuthenticated,
        setAuthenticated: this.setAuthenticated
      }}

aloukissas

import React from "react";

export const AuthContext = React.createContext({});

export const withAuthContext = ChildComponent => props => (
  <AuthContext.Consumer>
    {context => <ChildComponent {...props} auth={context} />}
  </AuthContext.Consumer>
);