Initial Start of Expo

.gitignore

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+node_modules/**/*
+.expo/*
+npm-debug.*
+*.jks
+*.p12
+*.key
+*.mobileprovision

.watchmanconfig

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+{}

App.js

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+import React from 'react';
+import { Platform, StatusBar, StyleSheet, View } from 'react-native';
+import { AppLoading, Asset, Font, Icon } from 'expo';
+import AppNavigator from './navigation/AppNavigator';
+
+export default class App extends React.Component {
+  state = {
+    isLoadingComplete: false,
+  };
+
+  render() {
+    if (!this.state.isLoadingComplete && !this.props.skipLoadingScreen) {
+      return (
+        <AppLoading
+          startAsync={this._loadResourcesAsync}
+          onError={this._handleLoadingError}
+          onFinish={this._handleFinishLoading}
+        />
+      );
+    } else {
+      return (
+        <View style={styles.container}>
+          {Platform.OS === 'ios' && <StatusBar barStyle="default" />}
+          <AppNavigator />
+        </View>
+      );
+    }
+  }
+
+  _loadResourcesAsync = async () => {
+    return Promise.all([
+      Asset.loadAsync([
+        require('./assets/images/robot-dev.png'),
+        require('./assets/images/robot-prod.png'),
+      ]),
+      Font.loadAsync({
+        // This is the font that we are using for our tab bar
+        ...Icon.Ionicons.font,
+        // We include SpaceMono because we use it in HomeScreen.js. Feel free
+        // to remove this if you are not using it in your app
+        'space-mono': require('./assets/fonts/SpaceMono-Regular.ttf'),
+      }),
+    ]);
+  };
+
+  _handleLoadingError = error => {
+    // In this case, you might want to report the error to your error
+    // reporting service, for example Sentry
+    console.warn(error);
+  };
+
+  _handleFinishLoading = () => {
+    this.setState({ isLoadingComplete: true });
+  };
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: '#fff',
+  },
+});

__tests__/App-test.js

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+import 'react-native';
+import React from 'react';
+import App from '../App';
+import renderer from 'react-test-renderer';
+import NavigationTestUtils from 'react-navigation/NavigationTestUtils';
+
+describe('App snapshot', () => {
+  jest.useFakeTimers();
+  beforeEach(() => {
+    NavigationTestUtils.resetInternalState();
+  });
+
+  it('renders the loading screen', async () => {
+    const tree = renderer.create(<App />).toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+
+  it('renders the root without loading screen', async () => {
+    const tree = renderer.create(<App skipLoadingScreen />).toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+});

app.json

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+{
+  "expo": {
+    "name": "The BullETin",
+    "slug": "BulletinMagExpo",
+    "privacy": "public",
+    "sdkVersion": "32.0.0",
+    "platforms": [
+      "ios",
+      "android"
+    ],
+    "version": "1.0.0",
+    "orientation": "portrait",
+    "icon": "./assets/images/icon.png",
+    "splash": {
+      "image": "./assets/images/splash.png",
+      "resizeMode": "contain",
+      "backgroundColor": "#007bbf"
+    },
+    "updates": {
+      "fallbackToCacheTimeout": 0
+    },
+    "assetBundlePatterns": [
+      "**/*"
+    ],
+    "ios": {
+      "supportsTablet": true
+    }
+  }
+}

babel.config.js

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+module.exports = function(api) {
+  api.cache(true);
+  return {
+    presets: ['babel-preset-expo'],
+  };
+};

components/StyledText.js

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+import React from 'react';
+import { Text } from 'react-native';
+
+export class MonoText extends React.Component {
+  render() {
+    return <Text {...this.props} style={[this.props.style, { fontFamily: 'space-mono' }]} />;
+  }
+}

components/TabBarIcon.js

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+import React from 'react';
+import { Icon } from 'expo';
+
+import Colors from '../constants/Colors';
+
+export default class TabBarIcon extends React.Component {
+  render() {
+    return (
+      <Icon.Ionicons
+        name={this.props.name}
+        size={26}
+        style={{ marginBottom: -3 }}
+        color={this.props.focused ? Colors.tabIconSelected : Colors.tabIconDefault}
+      />
+    );
+  }
+}

components/__tests__/StyledText-test.js

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+import 'react-native';
+import React from 'react';
+import { MonoText } from '../StyledText';
+import renderer from 'react-test-renderer';
+
+it('renders correctly', () => {
+  const tree = renderer.create(<MonoText>Snapshot test!</MonoText>).toJSON();
+
+  expect(tree).toMatchSnapshot();
+});

constants/Colors.js

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+const tintColor = '#2f95dc';
+
+export default {
+  tintColor,
+  tabIconDefault: '#ccc',
+  tabIconSelected: tintColor,
+  tabBar: '#fefefe',
+  errorBackground: 'red',
+  errorText: '#fff',
+  warningBackground: '#EAEB5E',
+  warningText: '#666804',
+  noticeBackground: tintColor,
+  noticeText: '#fff',
+};

constants/Layout.js

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+import { Dimensions } from 'react-native';
+
+const width = Dimensions.get('window').width;
+const height = Dimensions.get('window').height;
+
+export default {
+  window: {
+    width,
+    height,
+  },
+  isSmallDevice: width < 375,
+};

navigation/AppNavigator.js

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+import React from 'react';
+import { createAppContainer, createSwitchNavigator } from 'react-navigation';
+
+import MainTabNavigator from './MainTabNavigator';
+
+export default createAppContainer(createSwitchNavigator({
+  // You could add another route here for authentication.
+  // Read more at https://reactnavigation.org/docs/en/auth-flow.html
+  Main: MainTabNavigator,
+}));

navigation/MainTabNavigator.js

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+import React from 'react';
+import { Platform } from 'react-native';
+import { createStackNavigator, createBottomTabNavigator } from 'react-navigation';
+
+import TabBarIcon from '../components/TabBarIcon';
+import HomeScreen from '../screens/HomeScreen';
+import LinksScreen from '../screens/LinksScreen';
+import SettingsScreen from '../screens/SettingsScreen';
+
+const HomeStack = createStackNavigator({
+  Home: HomeScreen,
+});
+
+HomeStack.navigationOptions = {
+  tabBarLabel: 'Home',
+  tabBarIcon: ({ focused }) => (
+    <TabBarIcon
+      focused={focused}
+      name={
+        Platform.OS === 'ios'
+          ? `ios-information-circle${focused ? '' : '-outline'}`
+          : 'md-information-circle'
+      }
+    />
+  ),
+};
+
+const LinksStack = createStackNavigator({
+  Links: LinksScreen,
+});
+
+LinksStack.navigationOptions = {
+  tabBarLabel: 'Links',
+  tabBarIcon: ({ focused }) => (
+    <TabBarIcon
+      focused={focused}
+      name={Platform.OS === 'ios' ? 'ios-link' : 'md-link'}
+    />
+  ),
+};
+
+const SettingsStack = createStackNavigator({
+  Settings: SettingsScreen,
+});
+
+SettingsStack.navigationOptions = {
+  tabBarLabel: 'Settings',
+  tabBarIcon: ({ focused }) => (
+    <TabBarIcon
+      focused={focused}
+      name={Platform.OS === 'ios' ? 'ios-options' : 'md-options'}
+    />
+  ),
+};
+
+export default createBottomTabNavigator({
+  HomeStack,
+  LinksStack,
+  SettingsStack,
+});