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import AsyncStorage from '@react-native-community/async-storage';
import {useFocusEffect} from '@react-navigation/native';
import moment from 'moment';
import React, {useCallback, useEffect, useState} from 'react';
import {
RefreshControl,
SectionList,
StatusBar,
StyleSheet,
Text,
View,
} from 'react-native';
import {SafeAreaView} from 'react-native-safe-area-context';
import {useDispatch, useSelector} from 'react-redux';
import {Notification} from '../../components/notifications';
import {
loadUserNotifications,
updateNewNotificationReceived,
} from '../../store/actions';
import {RootState} from '../../store/rootReducer';
import {NotificationType, ScreenType} from '../../types';
import {getDateAge, SCREEN_HEIGHT} from '../../utils';
const NotificationsScreen: React.FC = () => {
const {moments: loggedInUserMoments} = useSelector(
(state: RootState) => state.moments,
);
const {newNotificationReceived} = useSelector(
(state: RootState) => state.user,
);
const [refreshing, setRefreshing] = useState(false);
// used for figuring out which ones are unread
const [lastViewed, setLastViewed] = useState<moment.Moment | undefined>(
undefined,
);
const {notifications} = useSelector(
(state: RootState) => state.notifications,
);
const {user: loggedInUser} = useSelector((state: RootState) => state.user);
const [sectionedNotifications, setSectionedNotifications] = useState<
{title: 'Today' | 'Yesterday' | 'This Week'; data: NotificationType[]}[]
>([]);
const dispatch = useDispatch();
const refreshNotifications = () => {
const refrestState = async () => {
dispatch(loadUserNotifications());
};
setRefreshing(true);
refrestState().then(() => {
setRefreshing(false);
});
};
const onRefresh = useCallback(() => {
refreshNotifications();
}, [refreshNotifications]);
useFocusEffect(
useCallback(() => {
const resetNewNotificationFlag = () => {
if (newNotificationReceived) {
dispatch(updateNewNotificationReceived(false));
}
};
//Called everytime screen is focused
if (newNotificationReceived) {
refreshNotifications();
}
//Called when user leaves the screen
return () => resetNewNotificationFlag();
}, [newNotificationReceived, dispatch, refreshNotifications]),
);
// handles storing and fetching the "previously viewed" information
useEffect(() => {
const getAndUpdateLastViewed = async () => {
const key = 'notificationLastViewed';
const previousLastViewed = await AsyncStorage.getItem(key);
setLastViewed(
previousLastViewed == null
? moment.unix(0)
: moment(previousLastViewed),
);
await AsyncStorage.setItem(key, moment().toString());
};
getAndUpdateLastViewed();
}, [notifications]);
// handles sectioning notifications to "date age"
// mark notifications as read or unread
useEffect(() => {
const sortedNotifications = (notifications ?? [])
.slice()
.sort((a, b) => (a.timestamp < b.timestamp ? 1 : -1));
let todays = [];
let yesterdays = [];
let thisWeeks = [];
for (const n of sortedNotifications) {
const notificationDate = moment(n.timestamp);
const dateAge = getDateAge(notificationDate);
if (dateAge === 'unknown') {
continue;
}
const unread = lastViewed ? lastViewed.diff(notificationDate) < 0 : false;
const newN = {...n, unread};
switch (dateAge) {
case 'today':
todays.push(newN);
continue;
case 'yesterday':
yesterdays.push(newN);
continue;
case 'thisWeek':
thisWeeks.push(newN);
continue;
default:
continue;
}
}
setSectionedNotifications([
{title: 'Today', data: todays},
{title: 'Yesterday', data: yesterdays},
{title: 'This Week', data: thisWeeks},
]);
}, [lastViewed, notifications]);
const renderNotification = ({item}: {item: NotificationType}) => (
<Notification
item={item}
screenType={ScreenType.Notifications}
loggedInUser={loggedInUser}
/>
);
const renderSectionHeader = ({section: {title, data}}) =>
data.length !== 0 && (
<View style={styles.sectionHeaderContainer}>
<Text style={styles.sectionHeader}>{title}</Text>
</View>
);
return (
<SafeAreaView>
<StatusBar barStyle={'dark-content'} />
<View style={styles.header}>
<Text style={styles.headerText}>Notifications</Text>
<View style={styles.underline} />
</View>
<SectionList
contentContainerStyle={styles.container}
sections={sectionedNotifications}
keyExtractor={(item, index) => index.toString()}
renderItem={renderNotification}
renderSectionHeader={renderSectionHeader}
refreshControl={
<RefreshControl refreshing={refreshing} onRefresh={onRefresh} />
}
/>
</SafeAreaView>
);
};
const styles = StyleSheet.create({
header: {
marginLeft: '8%',
marginTop: '5%',
alignSelf: 'flex-start',
flexDirection: 'column',
},
headerText: {
fontWeight: 'bold',
fontSize: 16,
},
underline: {
borderWidth: 2,
borderColor: '#8F01FF',
},
container: {
paddingBottom: '20%',
minHeight: (SCREEN_HEIGHT * 8) / 10,
},
sectionHeaderContainer: {
width: '100%',
backgroundColor: '#f3f2f2',
},
sectionHeader: {
marginLeft: '8%',
marginTop: '5%',
marginBottom: '2%',
fontSize: 15,
},
});
export default NotificationsScreen;
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