Sphere/app/components/routes/login.js

import React from 'react-native';
import GlobalStyles from '../../settings/styles';
import TokenHelp from '../login/token-help';

var dismissKeyboard = require('dismissKeyboard');

const {
  StyleSheet,
  Text,
  View,
  TextInput,
  TouchableHighlight,
  ScrollView,
  BackAndroid,
  TouchableWithoutFeedback
} = React;

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: GlobalStyles.get('CIRCLE_GREY_DARK'),
  },
  contentWrapper: {
    flex: 0.85,
    justifyContent: 'flex-start',
    alignItems: 'center'
  },
  input: {
    marginHorizontal: 15,
    fontSize: 15,
    textAlign: 'center'
  },
  loginButton: {
    flex: 1,
    backgroundColor: GlobalStyles.get('CIRCLE_GREEN'),
    justifyContent: 'center',
    alignItems: 'center',
    padding: 10,
    borderColor: GlobalStyles.get('CIRCLE_GREEN'),
    borderWidth: 2,
    borderRadius: 12
  },
  loginButtonText: {
    fontSize: 18,
    color: 'white',
  },
  buttonContainer: {
    flexDirection: 'row',
    justifyContent: 'center',
    padding: 10,
    paddingVertical: 15
  },
  title: {
    fontSize: 30,
    margin: 13
  },
  heading: {
    fontSize: 18,
    margin: 8,
    marginVertical: 20
  },
  helpText: {
    fontSize: 11,
    fontStyle: 'italic'
  },
  text: {
    color: 'white'
  }
});

export default class Login extends React.Component {
  constructor() {
    super();
    this.state = {
      token: '',
      showTokenHelp: false
    };
    this.validate = this.validate.bind(this);
    this.updateState = this.updateState.bind(this);
    this.showTokenHelp = this.showTokenHelp.bind(this);
    this.hideTokenHelp = this.hideTokenHelp.bind(this);
  }

  updateState(key, value) {
    let state = this.state;
    state[key] = value;
    this.setState(state);
  }

  validate() {
    dismissKeyboard();
  }

  showTokenHelp() {
    dismissKeyboard();
    this.setState({
      showTokenHelp: true
    });
  }

  hideTokenHelp() {
    this.setState({
      showTokenHelp: false
    });
  }

  componentWillUnmount() {
    BackAndroid.removeEventListener('hardwareBackPress', () => { return true; });  // Re-enable back button
  }

  componentWillMount() {
    BackAndroid.addEventListener('hardwareBackPress', () => { return true; });  // Disable back button
  }

  render() {
    return (
      <View style={styles.container}>
        <View style={styles.buttonContainer}>
          <Text style={[styles.title, styles.text]}>
            Sphere
          </Text>
        </View>
        <ScrollView keyboardShouldPersistTaps={false} contentContainerStyle={styles.container}>
            <View style={styles.contentWrapper}>
              <Text style={[styles.heading, styles.text]}>
                Please enter your CircleCI token
              </Text>
              <TextInput
                style={[styles.input, styles.text]}
                onChangeText={(token) => this.updateState('token', token)}
                value={this.state.token}
                onSubmitEditing={this.validate}
                placeholder="CircleCI Token"
                placeholderTextColor="#A7A7A7"
                autoCorrect={false}
              />
              <TouchableWithoutFeedback onPress={this.showTokenHelp}>
                <Text style={[styles.helpText, styles.text]}>
                  What's this?
                </Text>
              </TouchableWithoutFeedback>
            </View>
        </ScrollView>
        <View style={styles.buttonContainer}>
          <TouchableHighlight
            style={styles.loginButton}
            onPress={this.validate}
            underlayColor={GlobalStyles.get('CIRCLE_GREY_DARK')}>
            <Text style={[styles.loginButtonText, styles.text]}>
              Authenticate
            </Text>
          </TouchableHighlight>
        </View>
        <TokenHelp open={this.state.showTokenHelp} onClose={this.hideTokenHelp} />
      </View>
    );
  }
};