Started writing documentation and ported app to use Flow

.flowconfig

@@ -0,0 +1,11 @@
+[ignore]
+
+[include]
+
+[libs]
+
+[lints]
+
+[options]
+
+[strict]

App.js

@@ -1,3 +1,5 @@
+// @flow
+
 import React from 'react';
 import {StyleProvider, Root, View} from 'native-base';
 import AppNavigator from './navigation/AppNavigator';
@@ -7,26 +9,37 @@ import * as Font from 'expo-font';
 // edited native-base-shoutem-theme according to
 // https://github.com/GeekyAnts/theme/pull/5/files/91f67c55ca6e65fe3af779586b506950c9f331be#diff-4cfc2dd4d5dae7954012899f2268a422
 // to allow for dynamic theme switching
-import { clearThemeCache } from 'native-base-shoutem-theme';
+import {clearThemeCache} from 'native-base-shoutem-theme';
+
+type Props = {};
+
+type State = {
+    isLoading: boolean,
+    currentTheme: ?Object,
+};
+
+export default class App extends React.Component<Props, State> {
 
-export default class App extends React.Component {
+    state = {
+        isLoading: true,
+        currentTheme: null,
+    };
 
-    constructor(props) {
+    constructor(props: Object) {
         super(props);
-        LocaleManager.getInstance().initTranslations();
-        this.updateTheme = this.updateTheme.bind(this);
-        this.state = {
-            isLoading: true,
-            currentTheme: undefined,
-        };
+        LocaleManager.initTranslations();
     }
 
+    /**
+     * Loads data before components are mounted, like fonts and themes
+     * @returns {Promise}
+     */
     async componentWillMount() {
         await Font.loadAsync({
             'Roboto': require('native-base/Fonts/Roboto.ttf'),
             'Roboto_medium': require('native-base/Fonts/Roboto_medium.ttf'),
         });
-        ThemeManager.getInstance().setUpdateThemeCallback(this.updateTheme);
+        ThemeManager.getInstance().setUpdateThemeCallback(() => this.updateTheme());
         await ThemeManager.getInstance().getDataFromPreferences();
         this.setState({
             isLoading: false,
@@ -34,6 +47,9 @@ export default class App extends React.Component {
         });
     }
 
+    /**
+     * Updates the theme and clears the cache to force reloading the app colors
+     */
     updateTheme() {
         // console.log('update theme called');
         this.setState({
@@ -42,6 +58,11 @@ export default class App extends React.Component {
         clearThemeCache();
     }
 
+    /**
+     * Renders the app based on loading state
+     *
+     * @returns {*}
+     */
     render() {
         if (this.state.isLoading) {
             return <View/>;

components/CustomHeader.js

@@ -1,15 +1,31 @@
-import React from "react";
-import {Body, Button, Header, Icon, Left, Right, Title} from "native-base";
+// @flow
+
+import * as React from "react";
+import {Body, Header, Icon, Left, Right, Title} from "native-base";
 import {StyleSheet} from "react-native";
 import {getStatusBarHeight} from "react-native-status-bar-height";
 import Touchable from 'react-native-platform-touchable';
 
+type Props = {
+    backButton: boolean,
+    rightMenu: React.Node,
+    title: string,
+    navigation: Object,
+};
+
+
+export default class CustomHeader extends React.Component<Props> {
+
+    static defaultProps = {
+        backButton: false,
+        rightMenu: <Right/>,
+        fontSize: 26,
+        width: 30,
+    };
 
-export default class CustomHeader extends React.Component {
     render() {
         let button;
-        let rightMenu;
-        if (this.props.backButton !== undefined && this.props.backButton === true)
+        if (this.props.backButton)
             button =
                 <Touchable
                     style={{padding: 6}}
@@ -30,11 +46,6 @@ export default class CustomHeader extends React.Component {
                         type={'MaterialCommunityIcons'}/>
                 </Touchable>;
 
-        if (this.props.rightMenu)
-            rightMenu = this.props.rightMenu;
-        else
-            rightMenu = <Right/>;
-
         return (
             <Header style={styles.header}>
                 <Left>
@@ -43,7 +54,7 @@ export default class CustomHeader extends React.Component {
                 <Body>
                     <Title>{this.props.title}</Title>
                 </Body>
-                {rightMenu}
+                {this.props.rightMenu}
             </Header>);
     }
 };

components/CustomMaterialIcon.js

@@ -1,12 +1,25 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {Icon} from "native-base";
 import ThemeManager from '../utils/ThemeManager';
 
-export default class CustomMaterialIcon extends React.Component {
+type Props = {
+    active: boolean,
+    icon: string,
+    color: ?string,
+    fontSize: number,
+    width: number,
+}
+
+export default class CustomMaterialIcon extends React.Component<Props> {
 
-    constructor(props) {
-        super(props);
-    }
+    static defaultProps = {
+        active: false,
+        color: undefined,
+        fontSize: 26,
+        width: 30,
+    };
 
     render() {
         return (
@@ -21,8 +34,8 @@ export default class CustomMaterialIcon extends React.Component {
                             this.props.active ?
                                 ThemeManager.getInstance().getCurrentThemeVariables().brandPrimary :
                                 ThemeManager.getInstance().getCurrentThemeVariables().customMaterialIconColor,
-                    fontSize: this.props.fontSize !== undefined ? this.props.fontSize : 26,
-                    width: this.props.width !== undefined ? this.props.width : 30
+                    fontSize: this.props.fontSize,
+                    width: this.props.width
                 }}
             />
         );

components/SideMenu.js

@@ -1,6 +1,8 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {Platform, Dimensions, StyleSheet, Image, FlatList, Linking} from 'react-native';
-import {Badge, Text, Container, Content, Icon, Left, ListItem, Right} from "native-base";
+import {Badge, Text, Container, Content, Left, ListItem, Right} from "native-base";
 import i18n from "i18n-js";
 import CustomMaterialIcon from '../components/CustomMaterialIcon';
 
@@ -10,9 +12,19 @@ const drawerCover = require("../assets/drawer-cover.png");
 
 const WIKETUD_LINK = "https://www.etud.insa-toulouse.fr/wiketud/index.php/Accueil";
 
-export default class SideBar extends React.Component {
+type Props = {
+    navigation: Object,
+};
+
+type State = {
+    active: string,
+};
+
+export default class SideBar extends React.Component<Props, State> {
+
+    dataSet: Array<Object>;
 
-    constructor(props) {
+    constructor(props: Props) {
         super(props);
         this.state = {
             active: 'Home',
@@ -70,7 +82,7 @@ export default class SideBar extends React.Component {
         ];
     }
 
-    navigateToScreen(route) {
+    navigateToScreen(route: string) {
         this.props.navigation.navigate(route);
         this.props.navigation.closeDrawer();
         this.setState({active: route});
@@ -88,7 +100,7 @@ export default class SideBar extends React.Component {
                     <FlatList
                         data={this.dataSet}
                         extraData={this.state}
-                        keyExtractor={(item, index) => item.route}
+                        keyExtractor={(item) => item.route}
                         renderItem={({item}) =>
                             <ListItem
                                 button

components/TabBarIcon.js

@@ -1,16 +0,0 @@
-import React from 'react';
-import {Ionicons} from '@expo/vector-icons/build/Icons';
-
-export default class TabBarIcon extends React.Component {
-    render() {
-        return (
-            <Ionicons
-                name={this.props.name}
-                size={26}
-                style={{marginBottom: -3}}
-                color={this.props.focused ? Colors.tabIconSelected : Colors.tabIconDefault}
-            />
-        );
-    }
-
-}

navigation/AppNavigator.js

@@ -1,3 +1,5 @@
+// @flow
+
 import {createAppContainer, createStackNavigator} from 'react-navigation';
 
 import MainDrawerNavigator from './MainDrawerNavigator';

navigation/MainDrawerNavigator.js

@@ -1,4 +1,6 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {createDrawerNavigator} from 'react-navigation';
 
 import HomeScreen from '../screens/HomeScreen';

navigation/MainTabNavigator.js

@@ -1,58 +0,0 @@
-import React from 'react';
-import {Platform} from 'react-native';
-import {createStackNavigator} from 'react-navigation';
-import {createMaterialBottomTabNavigator} from "react-navigation-material-bottom-tabs";
-import TabBarIcon from '../components/TabBarIcon';
-
-import HomeScreen from '../screens/HomeScreen';
-import PlanningScreen from '../screens/PlanningScreen';
-
-const HomeStack = createStackNavigator({
-    Home: HomeScreen,
-});
-
-HomeStack.navigationOptions = {
-    tabBarLabel: 'Home',
-    tabBarIcon: ({focused}) => (
-        <TabBarIcon
-            focused={focused}
-            name={
-                Platform.OS === 'ios'
-                    ? 'ios-home'
-                    : 'md-home'
-            }
-        />
-    ),
-};
-
-const ProfileStack = createStackNavigator({
-    Profile: PlanningScreen,
-});
-
-ProfileStack.navigationOptions = {
-    tabBarLabel: 'Profile',
-    tabBarIcon: ({focused}) => (
-        <TabBarIcon
-            focused={focused}
-            name={
-                Platform.OS === 'ios'
-                    ? 'ios-people'
-                    : 'md-people'
-            }
-        />
-    ),
-};
-
-
-export default createMaterialBottomTabNavigator(
-    {
-        Home: HomeStack,
-        Profile: ProfileStack
-    }, {
-        initialRouteName: 'Home',
-        shifting: true,
-        activeColor: Colors.tabIconSelected,
-        inactiveColor: Colors.tabIconDefault,
-        barStyle: {backgroundColor: Colors.mainColor},
-    }
-);

screens/About/AboutDependenciesScreen.js

@@ -1,5 +1,7 @@
-import React from 'react';
-import {Container, Text, Content, ListItem, Body, Left, Thumbnail, Right, Button, Icon} from 'native-base';
+// @flow
+
+import * as React from 'react';
+import {Container, Text, Content, ListItem, Body} from 'native-base';
 import CustomHeader from "../../components/CustomHeader";
 import {FlatList} from "react-native";
 import i18n from "i18n-js";
@@ -14,8 +16,11 @@ function generateListFromObject(object) {
     return list;
 }
 
+type Props = {
+    navigation: Object
+}
 
-export default class AboutDependenciesScreen extends React.Component {
+export default class AboutDependenciesScreen extends React.Component<Props> {
 
     render() {
         const nav = this.props.navigation;
@@ -26,7 +31,7 @@ export default class AboutDependenciesScreen extends React.Component {
                 <Content>
                     <FlatList
                         data={data}
-                        keyExtractor={(item, index) => item.name}
+                        keyExtractor={(item) => item.name}
                         style={{minHeight: 300, width: '100%'}}
                         renderItem={({item}) =>
                             <ListItem>

screens/About/AboutScreen.js

@@ -1,6 +1,8 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {Platform, StyleSheet, Linking, Alert, FlatList} from 'react-native';
-import {Container, Content, Text, Card, CardItem, Body, Icon, Left, Right, Thumbnail, H1, ListItem} from 'native-base';
+import {Container, Content, Text, Card, CardItem, Body, Left, Right, Thumbnail, H1} from 'native-base';
 import CustomHeader from "../../components/CustomHeader";
 import i18n from "i18n-js";
 import appJson from '../../app';
@@ -20,13 +22,18 @@ const links = {
     react: 'https://facebook.github.io/react-native/',
 };
 
+type Props = {
+    navigation: Object,
+};
+
+
 function openWebLink(link) {
     Linking.openURL(link).catch((err) => console.error('Error opening link', err));
 }
 
-export default class AboutScreen extends React.Component {
+export default class AboutScreen extends React.Component<Props> {
 
-    appData = [
+    appData: Array<Object> = [
         {
             onPressCallback: () => openWebLink(Platform.OS === "ios" ? links.appstore : links.playstore),
             icon: Platform.OS === "ios" ? 'apple' : 'google-play',
@@ -59,7 +66,7 @@ export default class AboutScreen extends React.Component {
         },
     ];
 
-    authorData = [
+    authorData: Array<Object> = [
         {
             onPressCallback: () => Alert.alert('Coucou', 'Whaou'),
             icon: 'account-circle',
@@ -86,7 +93,7 @@ export default class AboutScreen extends React.Component {
         },
     ];
 
-    technoData = [
+    technoData: Array<Object> = [
         {
             onPressCallback: () => openWebLink(links.react),
             icon: 'react',
@@ -101,7 +108,7 @@ export default class AboutScreen extends React.Component {
         },
     ];
 
-    getCardItem(onPressCallback, icon, text, showChevron) {
+    getCardItem(onPressCallback: Function, icon: string, text: string, showChevron: boolean) {
         return (
             <CardItem button
                       onPress={onPressCallback}>
@@ -178,12 +185,3 @@ export default class AboutScreen extends React.Component {
         );
     }
 }
-
-const styles = StyleSheet.create({
-    container: {
-        flex: 1,
-        backgroundColor: '#fff',
-        alignItems: 'center',
-        justifyContent: 'center',
-    },
-});

screens/HomeScreen.js

@@ -1,12 +1,16 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {Container, Content, Text, Button, Icon} from 'native-base';
 import CustomHeader from '../components/CustomHeader';
 import i18n from "i18n-js";
 import NotificationsManager from '../utils/NotificationsManager'
-import { Notifications } from 'expo';
 
+type Props = {
+    navigation: Object,
+}
 
-export default class HomeScreen extends React.Component {
+export default class HomeScreen extends React.Component<Props> {
     render() {
         const nav = this.props.navigation;
         return (
@@ -19,7 +23,7 @@ export default class HomeScreen extends React.Component {
                             name={'bell-ring'}
                             type={'MaterialCommunityIcons'}
                         />
-                        <Text>Notif</Text>
+                        <Text>Instant Notification</Text>
                     </Button>
                 </Content>
             </Container>

screens/PlanningScreen.js

@@ -1,10 +1,15 @@
-import React from 'react';
-import { StyleSheet, View } from 'react-native';
+// @flow
+
+import * as React from 'react';
 import {Container, Text} from 'native-base';
 import CustomHeader from "../components/CustomHeader";
 import i18n from "i18n-js";
 
-export default class PlanningScreen extends React.Component {
+type Props = {
+    navigation: Object,
+}
+
+export default class PlanningScreen extends React.Component<Props> {
     render() {
         const nav = this.props.navigation;
         return (
@@ -14,11 +19,4 @@ export default class PlanningScreen extends React.Component {
         );
     }
 }
-const styles = StyleSheet.create({
-    container: {
-        flex: 1,
-        backgroundColor: '#fff',
-        alignItems: 'center',
-        justifyContent: 'center',
-    },
-});
+

screens/Proximo/ProximoListScreen.js

@@ -1,9 +1,11 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {Container, Text, Content, ListItem, Left, Thumbnail, Right, Body, Icon} from 'native-base';
 import CustomHeader from "../../components/CustomHeader";
-import {AsyncStorage, FlatList, View} from "react-native";
+import {FlatList} from "react-native";
 import Touchable from 'react-native-platform-touchable';
-import Menu, {MenuItem, MenuDivider} from 'react-native-material-menu';
+import Menu, {MenuItem} from 'react-native-material-menu';
 import i18n from "i18n-js";
 
 const IMG_URL = "https://etud.insa-toulouse.fr/~vergnet/appli-amicale/img/";
@@ -39,24 +41,35 @@ function sortNameReverse(a, b) {
     return 0;
 }
 
+type Props = {
+    navigation: Object
+}
 
-export default class ProximoMainScreen extends React.Component {
-    constructor(props) {
-        super(props);
-        this.state = {
-            navData: this.props.navigation.getParam('data', []).sort(sortPrice),
-            currentSortMode: sortMode.price,
-            isSortReversed: false,
-            sortPriceIcon: '',
-            sortNameIcon: '',
-        };
-    }
+type State = {
+    navData: Array<Object>,
+    currentSortMode: string,
+    isSortReversed: boolean,
+    sortPriceIcon: React.Node,
+    sortNameIcon: React.Node,
+};
+
+export default class ProximoMainScreen extends React.Component<Props, State> {
+
+    state = {
+        navData: this.props.navigation.getParam('data', []).sort(sortPrice),
+        currentSortMode: sortMode.price,
+        isSortReversed: false,
+        sortPriceIcon: '',
+        sortNameIcon: '',
+    };
+
+    _menu: Menu;
 
-    setMenuRef = ref => {
+    setMenuRef = (ref: Menu) => {
         this._menu = ref;
     };
 
-    toggleSortMode(mode) {
+    toggleSortMode(mode: string) {
         let isReverse = this.state.isSortReversed;
         if (mode === this.state.currentSortMode) // reverse mode
             isReverse = !isReverse; // this.state not updating on this function cycle
@@ -65,7 +78,7 @@ export default class ProximoMainScreen extends React.Component {
         this.setSortMode(mode, isReverse);
     }
 
-    setSortMode(mode, isReverse) {
+    setSortMode(mode: string, isReverse: boolean) {
         this.setState({
             currentSortMode: mode,
             isSortReversed: isReverse
@@ -98,7 +111,7 @@ export default class ProximoMainScreen extends React.Component {
         this.setSortMode(this.state.currentSortMode, this.state.isSortReversed);
     }
 
-    setupSortIcons(mode, isReverse) {
+    setupSortIcons(mode: string, isReverse: boolean) {
         const downSortIcon =
             <Icon
                 active

screens/Proximo/ProximoMainScreen.js

@@ -1,6 +1,8 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {RefreshControl, SectionList} from 'react-native';
-import {Container, Text, Content, ListItem, Left, Right, Body, Badge, Icon, Toast, H2} from 'native-base';
+import {Container, Text, ListItem, Left, Right, Body, Badge, Toast, H2} from 'native-base';
 import CustomHeader from "../../components/CustomHeader";
 import i18n from "i18n-js";
 import CustomMaterialIcon from "../../components/CustomMaterialIcon";
@@ -15,18 +17,25 @@ const typesIcons = {
     Default: "information-outline",
 };
 
-export default class ProximoMainScreen extends React.Component {
+type Props = {
+    navigation: Object
+}
 
-    constructor(props) {
-        super(props);
-        this.state = {
-            refreshing: false,
-            firstLoading: true,
-            data: {},
-        };
-    }
+type State = {
+    refreshing: boolean,
+    firstLoading: boolean,
+    data: Object,
+};
+
+export default class ProximoMainScreen extends React.Component<Props, State> {
+
+    state = {
+        refreshing: false,
+        firstLoading: true,
+        data: {},
+    };
 
-    static generateDataset(types, data) {
+    static generateDataset(types: Array<string>, data: Object) {
         let finalData = [];
         for (let i = 0; i < types.length; i++) {
             finalData.push({

screens/ProxiwashScreen.js

@@ -1,4 +1,6 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {SectionList, RefreshControl, View} from 'react-native';
 import {Body, Container, Icon, Left, ListItem, Right, Text, Toast, H2, Button} from 'native-base';
 import CustomHeader from "../components/CustomHeader";
@@ -25,10 +27,27 @@ let stateStrings = {};
 
 let stateColors = {};
 
+type Props = {
+    navigation: Object,
+};
+
+type State = {
+    refreshing: boolean,
+    firstLoading: boolean,
+    data: Object,
+    machinesWatched: Array<Object>
+};
+
+export default class ProxiwashScreen extends React.Component<Props, State> {
 
-export default class ProxiwashScreen extends React.Component {
+    state = {
+        refreshing: false,
+        firstLoading: true,
+        data: {},
+        machinesWatched: [],
+    };
 
-    constructor(props) {
+    constructor(props: Props) {
         super(props);
         let colors = ThemeManager.getInstance().getCurrentThemeVariables();
         stateColors[MACHINE_STATES.TERMINE] = colors.proxiwashFinishedColor;
@@ -42,24 +61,12 @@ export default class ProxiwashScreen extends React.Component {
         stateStrings[MACHINE_STATES.FONCTIONNE] = i18n.t('proxiwashScreen.states.running');
         stateStrings[MACHINE_STATES.HS] = i18n.t('proxiwashScreen.states.broken');
         stateStrings[MACHINE_STATES.ERREUR] = i18n.t('proxiwashScreen.states.error');
-        this.state = {
-            refreshing: false,
-            firstLoading: true,
-            data: {},
-            machinesWatched: [],
-        };
     }
 
     async readData() {
         try {
             let response = await fetch(DATA_URL);
             let responseJson = await response.json();
-            // This prevents end notifications from showing
-            // let watchList = this.state.machinesWatched;
-            // for (let i = 0; i < watchList.length; i++) {
-            //     if (responseJson[MACHINE_STATES[watchList[i].machineNumber.state]] !== MACHINE_STATES.FONCTIONNE)
-            //         this.disableNotification(watchList[i].machineNumber);
-            // }
             this.setState({
                 data: responseJson
             });
@@ -98,21 +105,23 @@ export default class ProxiwashScreen extends React.Component {
         });
     };
 
-    static getRemainingTime(startString, endString, percentDone) {
+    static getRemainingTime(startString: string, endString: string, percentDone: string): number {
         let startArray = startString.split(':');
         let endArray = endString.split(':');
         let startDate = new Date();
         startDate.setHours(parseInt(startArray[0]), parseInt(startArray[1]), 0, 0);
         let endDate = new Date();
         endDate.setHours(parseInt(endArray[0]), parseInt(endArray[1]), 0, 0);
-        return (((100 - percentDone) / 100) * (endDate - startDate) / (60 * 1000)).toFixed(0); // Convert milliseconds into minutes
+        // Convert milliseconds into minutes
+        let time: string = (((100 - parseFloat(percentDone)) / 100) * (endDate - startDate) / (60 * 1000)).toFixed(0);
+        return parseInt(time);
     }
 
-    async setupNotifications(number, remainingTime) {
-        if (!this.isMachineWatched(number)) {
+    async setupNotifications(machineId: string, remainingTime: number) {
+        if (!this.isMachineWatched(machineId)) {
             let endNotifID = await NotificationsManager.scheduleNotification(
                 i18n.t('proxiwashScreen.notifications.machineFinishedTitle'),
-                i18n.t('proxiwashScreen.notifications.machineFinishedBody', {number: number}),
+                i18n.t('proxiwashScreen.notifications.machineFinishedBody', {number: machineId}),
                 new Date().getTime() + remainingTime * (60 * 1000) // Convert back to milliseconds
             );
             let reminderNotifID = undefined;
@@ -127,41 +136,41 @@ export default class ProxiwashScreen extends React.Component {
             if (remainingTime > reminderNotifTime && reminderNotifTime > 0) {
                 reminderNotifID = await NotificationsManager.scheduleNotification(
                     i18n.t('proxiwashScreen.notifications.machineRunningTitle', {time: reminderNotifTime}),
-                    i18n.t('proxiwashScreen.notifications.machineRunningBody', {number: number}),
+                    i18n.t('proxiwashScreen.notifications.machineRunningBody', {number: machineId}),
                     new Date().getTime() + (remainingTime - reminderNotifTime) * (60 * 1000) // Convert back to milliseconds
                 );
             }
             let data = this.state.machinesWatched;
-            data.push({machineNumber: number, endNotifID: endNotifID, reminderNotifID: reminderNotifID});
+            data.push({machineNumber: machineId, endNotifID: endNotifID, reminderNotifID: reminderNotifID});
             this.setState({machinesWatched: data});
             AsyncStorage.setItem(WATCHED_MACHINES_PREFKEY, JSON.stringify(data));
         } else
-            this.disableNotification(number);
+            this.disableNotification(machineId);
     }
 
-    disableNotification(number) {
-        let data = this.state.machinesWatched;
+    disableNotification(machineId: string) {
+        let data: Object = this.state.machinesWatched;
         if (data.length > 0) {
             let elem = this.state.machinesWatched.find(function (elem) {
-                return elem.machineNumber === number
+                return elem.machineNumber === machineId
             });
             let arrayIndex = data.indexOf(elem);
-            NotificationsManager.cancelScheduledNoification(data[arrayIndex].endNotifID);
+            NotificationsManager.cancelScheduledNotification(data[arrayIndex].endNotifID);
             if (data[arrayIndex].reminderNotifID !== undefined)
-                NotificationsManager.cancelScheduledNoification(data[arrayIndex].reminderNotifID);
+                NotificationsManager.cancelScheduledNotification(data[arrayIndex].reminderNotifID);
             data.splice(arrayIndex, 1);
             this.setState({machinesWatched: data});
             AsyncStorage.setItem(WATCHED_MACHINES_PREFKEY, JSON.stringify(data));
         }
     }
 
-    isMachineWatched(number) {
+    isMachineWatched(number: string) {
         return this.state.machinesWatched.find(function (elem) {
             return elem.machineNumber === number
         }) !== undefined;
     }
 
-    renderItem(item, section, data) {
+    renderItem(item: Object, section: Object, data: Object) {
         return (
             <ListItem
                 thumbnail

screens/SettingsScreen.js

@@ -1,4 +1,6 @@
-import React from 'react';
+// @flow
+
+import * as React from 'react';
 import {
     Container,
     Content,
@@ -22,7 +24,16 @@ import {AsyncStorage} from 'react-native'
 
 const proxiwashNotifKey = "proxiwashNotifKey";
 
-export default class SettingsScreen extends React.Component {
+type Props = {
+    navigation: Object,
+};
+
+type State = {
+    nightMode: boolean,
+    proxiwashNotifPickerSelected: string,
+};
+
+export default class SettingsScreen extends React.Component<Props, State> {
     state = {
         nightMode: ThemeManager.getInstance().getNightMode(),
         proxiwashNotifPickerSelected: "5"
@@ -38,21 +49,21 @@ export default class SettingsScreen extends React.Component {
     }
 
 
-    onProxiwashNotidPickerValueChange(value) {
+    onProxiwashNotifPickerValueChange(value: string) {
         AsyncStorage.setItem(proxiwashNotifKey, value);
         this.setState({
             proxiwashNotifPickerSelected: value
         });
     }
 
-    getproxiwashNotifPicker() {
+    getProxiwashNotifPicker() {
         return (
             <Picker
                 note
                 mode="dropdown"
                 style={{width: 120}}
                 selectedValue={this.state.proxiwashNotifPickerSelected}
-                onValueChange={(value) => this.onProxiwashNotidPickerValueChange(value)}
+                onValueChange={(value) => this.onProxiwashNotifPickerValueChange(value)}
             >
                 <Picker.Item label={i18n.t('settingsScreen.proxiwashNotifReminderPicker.never')} value="never"/>
                 <Picker.Item label={i18n.t('settingsScreen.proxiwashNotifReminderPicker.1')} value="1"/>
@@ -67,7 +78,7 @@ export default class SettingsScreen extends React.Component {
     }
 
     toggleNightMode() {
-        ThemeManager.getInstance().setNightmode(!this.state.nightMode);
+        ThemeManager.getInstance().setNightMode(!this.state.nightMode);
         this.setState({nightMode: !this.state.nightMode});
         // Alert.alert(i18n.t('settingsScreen.nightMode'), i18n.t('settingsScreen.restart'));
         this.resetStack();
@@ -83,7 +94,7 @@ export default class SettingsScreen extends React.Component {
         this.props.navigation.navigate('Settings');
     }
 
-    getToggleItem(onPressCallback, icon, text, subtitle) {
+    getToggleItem(onPressCallback: Function, icon: string, text: string, subtitle: string) {
         return (
             <ListItem
                 button
@@ -109,7 +120,7 @@ export default class SettingsScreen extends React.Component {
         );
     }
 
-    getGeneralItem(control, icon, text, subtitle) {
+    static getGeneralItem(control: React.Node, icon: string, text: string, subtitle: string) {
         return (
             <ListItem
                 thumbnail
@@ -152,7 +163,7 @@ export default class SettingsScreen extends React.Component {
                             <Text>Proxiwash</Text>
                         </CardItem>
                         <List>
-                            {this.getGeneralItem(this.getproxiwashNotifPicker(), 'washing-machine', i18n.t('settingsScreen.proxiwashNotifReminder'), i18n.t('settingsScreen.proxiwashNotifReminderSub'))}
+                            {SettingsScreen.getGeneralItem(this.getProxiwashNotifPicker(), 'washing-machine', i18n.t('settingsScreen.proxiwashNotifReminder'), i18n.t('settingsScreen.proxiwashNotifReminderSub'))}
                         </List>
                     </Card>
                 </Content>

utils/LocaleManager.js

@@ -1,21 +1,20 @@
+// @flow
+
 import i18n from 'i18n-js';
 import * as Localization from 'expo-localization';
 
 import en from '../translations/en';
 import fr from '../translations/fr';
 
+/**
+ * Static class used to manage locales
+ */
 export default class LocaleManager {
 
-    static instance = null;
-
-    static getInstance() {
-        if (LocaleManager.instance == null) {
-            LocaleManager.instance = new LocaleManager();
-        }
-        return this.instance;
-    }
-
-    initTranslations() {
+    /**
+     * Initialize translations using language files
+     */
+    static initTranslations() {
         i18n.fallbacks = true;
         i18n.translations = {fr, en};
         i18n.locale = Localization.locale;

utils/NotificationsManager.js

@@ -1,8 +1,18 @@
+// @flow
+
 import * as Permissions from 'expo-permissions';
 import { Notifications } from 'expo';
 
+/**
+ * Static class used to manage notifications sent to the user
+ */
 export default class NotificationsManager {
 
+    /**
+     * Async function asking permission to send notifications to the user
+     *
+     * @returns {Promise}
+     */
     static async askPermissions() {
         const {status: existingStatus} = await Permissions.getAsync(Permissions.NOTIFICATIONS);
         let finalStatus = existingStatus;
@@ -13,7 +23,14 @@ export default class NotificationsManager {
         return finalStatus === 'granted';
     }
 
-    static async sendNotificationImmediately (title, body) {
+    /**
+     * Async function sending a notification without delay to the user
+     *
+     * @param title {String} Notification title
+     * @param body {String} Notification body text
+     * @returns {Promise<import("react").ReactText>} Notification Id
+     */
+    static async sendNotificationImmediately (title: string, body: string) {
         await NotificationsManager.askPermissions();
         return await Notifications.presentLocalNotificationAsync({
             title: title,
@@ -21,7 +38,15 @@ export default class NotificationsManager {
         });
     };
 
-    static async scheduleNotification(title, body, time) {
+    /**
+     * Async function sending notification at the specified time
+     *
+     * @param title Notification title
+     * @param body Notification body text
+     * @param time Time at which we should send the notification
+     * @returns {Promise<import("react").ReactText>} Notification Id
+     */
+    static async scheduleNotification(title: string, body: string, time: number): Promise<void> {
         await NotificationsManager.askPermissions();
         return Notifications.scheduleLocalNotificationAsync(
             {
@@ -34,7 +59,12 @@ export default class NotificationsManager {
         );
     };
 
-    static async cancelScheduledNoification(notifID) {
-        await Notifications.cancelScheduledNotificationAsync(notifID);
+    /**
+     * Async function used to cancel the notification of a specific ID
+     * @param notificationID {Number} The notification ID
+     * @returns {Promise}
+     */
+    static async cancelScheduledNotification(notificationID: number) {
+        await Notifications.cancelScheduledNotificationAsync(notificationID);
     }
 }

utils/ThemeManager.js

@@ -1,3 +1,5 @@
+// @flow
+
 import {AsyncStorage} from 'react-native'
 import platform from '../native-base-theme/variables/platform';
 import platformDark from '../native-base-theme/variables/platformDark';
@@ -5,53 +7,85 @@ import getTheme from '../native-base-theme/components';
 
 const nightModeKey = 'nightMode';
 
+/**
+ * Singleton class used to manage themes
+ */
 export default class ThemeManager {
 
-    static instance = null;
+    static instance: ThemeManager | null = null;
+    nightMode: boolean;
+    updateThemeCallback: Function;
 
     constructor() {
         this.nightMode = false;
-        this.updateThemeCallback = undefined;
+        this.updateThemeCallback = null;
     }
 
-    static getInstance() {
-        if (ThemeManager.instance == null) {
-            ThemeManager.instance = new ThemeManager();
-        }
-        return this.instance;
+    /**
+     * Get this class instance or create one if none is found
+     * @returns {ThemeManager}
+     */
+    static getInstance(): ThemeManager {
+        return ThemeManager.instance === null ?
+            ThemeManager.instance = new ThemeManager() :
+            ThemeManager.instance;
     }
 
-    setUpdateThemeCallback(callback) {
+    /**
+     * Set the function to be called when the theme is changed (allows for general reload of the app)
+     * @param callback Function to call after theme change
+     */
+    setUpdateThemeCallback(callback: ?Function) {
         this.updateThemeCallback = callback;
     }
 
-    async getDataFromPreferences() {
-        let result = await AsyncStorage.getItem(nightModeKey);
+    /**
+     * Read async storage to get preferences
+     * @returns {Promise<void>}
+     */
+    async getDataFromPreferences(): Promise<void> {
+        let result: string = await AsyncStorage.getItem(nightModeKey);
 
         if (result === '1')
             this.nightMode = true;
-        console.log('nightmode: ' + this.nightMode);
+        // console.log('nightmode: ' + this.nightMode);
     }
 
-    setNightmode(isNightMode) {
+    /**
+     * Set night mode and save it to preferences
+     *
+     * @param isNightMode Whether to enable night mode
+     */
+    setNightMode(isNightMode: boolean) {
         this.nightMode = isNightMode;
         AsyncStorage.setItem(nightModeKey, isNightMode ? '1' : '0');
-        if (this.updateThemeCallback !== undefined)
+        if (this.updateThemeCallback !== null)
             this.updateThemeCallback();
     }
 
-    getNightMode() {
+    /**
+     * @returns {boolean} Night mode state
+     */
+    getNightMode(): boolean {
         return this.nightMode;
     }
 
-    getCurrentTheme() {
+    /**
+     * Get the current theme based on night mode
+     * @returns {Object}
+     */
+    getCurrentTheme(): Object {
         if (this.nightMode)
             return getTheme(platformDark);
         else
             return getTheme(platform);
     }
 
-    getCurrentThemeVariables() {
+    /**
+     * Get the variables contained in the current theme
+     * @returns {Object}
+     */
+    getCurrentThemeVariables(): Object {
         return this.getCurrentTheme().variables;
     }