Add react native js components

App.js

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+import AuthLoading from './src/AuthLoading'
+import Messages from './src/Messages'
+import Login from './src/Login'
+import { createSwitchNavigator } from 'react-navigation';
+
+export default createSwitchNavigator({
+    Messages: {
+        screen: Messages,
+    },
+    Login: {
+        screen: Login,
+    },
+    AuthLoading: {
+        screen: AuthLoading
+    },
+}, {initialRouteName: 'AuthLoading'});

index.js

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+import { AppRegistry, YellowBox } from 'react-native';
+import App from './App';
+
+YellowBox.ignoreWarnings(['Warning: isMounted(...) is deprecated', 'Module RCTImageLoader']);
+
+AppRegistry.registerComponent('gotify', () => App);

src/AuthLoading.js

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+import React from 'react';
+import {
+    ActivityIndicator,
+    AsyncStorage,
+    StatusBar,
+    StyleSheet,
+    View,
+} from 'react-native';
+import SharedPreferences from 'react-native-shared-preferences';
+
+export default class AuthLoadingScreen extends React.Component {
+    componentDidMount() {
+        SharedPreferences.getItem('@global:token', (token) => {
+            this.props.navigation.navigate(token ? 'Messages' : 'Login');
+        });
+    }
+
+    render() {
+        return (
+            <View >
+                <ActivityIndicator />
+                <StatusBar barStyle="default" />
+            </View>
+        );
+    }
+}

src/Login.js

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+import React from 'react';
+import { View, Text, TextInput, Button, ToastAndroid } from 'react-native';
+import SharedPreferences from 'react-native-shared-preferences';
+import Icon from 'react-native-vector-icons/MaterialIcons'
+import DeviceInfo from 'react-native-device-info';
+import * as axios from "axios";
+
+const urlRegex = new RegExp("^(http|https)://", "i");
+const defaultClientName = DeviceInfo.getManufacturer() + ' ' + DeviceInfo.getDeviceId();
+export default class Login extends React.Component {
+    state = {tryConnect: null, url: null, error: null, version: null, name: '', pass: '', loggedIn: null, client: defaultClientName};
+    componentDidMount() {
+        SharedPreferences.getItem("@global:url", (url) => {
+            if (url) {
+                this.setState({...this.state, url: url}, this.checkUrl);
+            }
+        });
+    }
+
+    handleChange = (name, merge) => {
+        return (val) => {
+            const old = {...this.state, ...(merge || {})};
+            old[name] = val;
+            this.setState(old);
+        }
+    };
+
+    reachedButNot = () => {
+        this.setState({...this.state, tryConnect: false, error: 'server exists, but it is not a valid gotify instance'})
+    };
+
+    notReachable = () => {
+        this.setState({...this.state, tryConnect: false, error: 'could not reach ' + this.state.url})
+    };
+
+    createClient = () => {
+        const {client, url, pass, name}  = this.state;
+        axios.post(url + 'client', {name: client}, {auth:{username: name, password: pass}}).then((resp) => {
+            SharedPreferences.setItem('@global:token', resp.data.token);
+            ToastAndroid.show("Created client " + client + " for user " + name, ToastAndroid.SHORT);
+            this.props.navigation.navigate('AuthLoading')
+        }).catch(() => {
+            ToastAndroid.show("Could not create client", ToastAndroid.SHORT);
+        })
+    };
+
+    version(url, errorCallback, reachedButNoApi) {
+        axios.get(url + 'version').then((resp) => {
+            if (resp && resp.status === 200) {
+                const {data} = resp;
+                if (data
+                    && typeof data === 'object'
+                    && 'version' in data
+                    && 'buildDate' in data
+                    && 'commit' in data
+                ) {
+                    SharedPreferences.setItem('@global:url', url);
+                    this.setState({...this.state, url: url, tryConnect: true, error: null, version: data});
+                    return;
+                }
+            }
+            (reachedButNoApi ? reachedButNoApi : errorCallback)();
+        }).catch(errorCallback);
+    }
+
+    checkUrl = () => {
+        let {url} = this.state;
+        if (!url.endsWith('/')) {
+            url += '/';
+        }
+
+        if (urlRegex.test(url)) {
+            if(url.match(/^http:\/\//i)){
+                this.version(url.replace(/^http:\/\//i,"https://"), () => {
+                    this.version(url, this.notReachable, this.reachedButNot)
+                });
+            } else {
+                this.version(url, this.notReachable,this.reachedButNot)
+            }
+        } else {
+            this.setState({...this.state, error: 'url must either start with http:// or https://'})
+        }
+    };
+
+    checkUser = () => {
+        const {url, pass, name}  = this.state;
+        axios.get(url + 'current/user', {auth:{username: name, password: pass}}).then((resp) => {
+            this.setState({...this.state, loggedIn: true})
+        }).catch((resp) => {
+            this.setState({...this.state, loggedIn: false})
+        })
+    };
+
+    render() {
+        const {tryConnect, error, version, url, client, loggedIn} = this.state;
+
+        return (
+            <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center'}}>
+                <View style={{width: "80%"}}>
+                    <Text style={{fontSize: 20, textAlign:'center'}}>Gotify</Text>
+                    <View style={{ alignItems: 'center', flexDirection: 'row'}}>
+                        <TextInput
+                            value={url}
+                            placeholder="URL f.ex https://push.domain.tld"
+                            style={{alignSelf: 'stretch', flex: 1}}
+                            keyboardType="url"
+                            onChangeText={this.handleChange('url', {tryConnect: false, version: null})}/>
+                        <Icon.Button name="send" style={{alignSelf: 'flex-end'}} iconStyle={{marginRight: 0}} onPress={this.checkUrl}/>
+                    </View>
+                    {error && <Text style={{textAlign:'center', color: 'red'}}>{error}</Text>}
+                    {version && <Text style={{textAlign:'center', color: 'green'}}>Gotify v{version.version}</Text>}
+                    {tryConnect === true && (
+                        <React.Fragment>
+                            <TextInput placeholder="Username"
+                                       onChangeText={this.handleChange('name', {loggedIn: null})}
+                                       style={{width: '100%'}}/>
+                            <View style={{ alignItems: 'center', flexDirection: 'row'}}>
+
+                            <TextInput placeholder="Password"
+                                       secureTextEntry={true}
+                                       onChangeText={this.handleChange('pass', {loggedIn: null})}
+                                       style={{alignSelf: 'stretch', flex: 1}}
+                            />
+                                <Icon.Button name="send" style={{alignSelf: 'flex-end'}} iconStyle={{marginRight: 0}} onPress={this.checkUser}/>
+                            </View>
+                            {loggedIn === true && (
+                                <React.Fragment>
+
+                                    <Text  style={{textAlign:'center', color: 'green'}}>
+                                        valid user
+                                    </Text>
+
+                                    <TextInput placeholder="Client Name"
+                                               value={client}
+                                               onChangeText={this.handleChange('client')}
+                                               style={{width: '100%'}}/>
+                                    <Button title="Create Client" onPress={this.createClient} />
+
+                                </React.Fragment>
+                            )}
+                            {loggedIn === false && (
+                                <Text  style={{textAlign:'center', color: 'red'}}>
+                                    wrong name / pass
+                                </Text>
+                            )}
+
+                        </React.Fragment>
+                    )}
+                </View>
+            </View>
+
+        );
+    }
+}

src/Messages.js

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+import React from 'react';
+import {Button, Text, View} from "react-native";
+import SharedPreferences from 'react-native-shared-preferences';
+
+export default class Messages extends React.Component {
+    render() {
+        SharedPreferences.getAll(console.log);
+        return (
+            <View>
+                <Text>TODO</Text>
+                <Button onPress={() => {
+                    SharedPreferences.removeItem("@global:token");
+                    this.props.navigation.navigate('AuthLoading');
+                }} title="Logout"/>
+            </View>
+        )
+    }
+}