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import React from 'react'
import {observer} from 'mobx-react-lite'
import {Text, View, FlatList} from 'react-native'
import {
NotificationsViewModel,
NotificationsViewItemModel,
} from '../../../state/models/notifications-view'
import {FeedItem} from './FeedItem'
import {ErrorMessage} from '../util/ErrorMessage'
import {EmptyState} from '../util/EmptyState'
export const Feed = observer(function Feed({
view,
onPressTryAgain,
}: {
view: NotificationsViewModel
onPressTryAgain?: () => void
}) {
// TODO optimize renderItem or FeedItem, we're getting this notice from RN: -prf
// VirtualizedList: You have a large list that is slow to update - make sure your
// renderItem function renders components that follow React performance best practices
// like PureComponent, shouldComponentUpdate, etc
const renderItem = ({item}: {item: NotificationsViewItemModel}) => (
<FeedItem item={item} />
)
const onRefresh = () => {
view.refresh().catch(err => console.error('Failed to refresh', err))
}
const onEndReached = () => {
view.loadMore().catch(err => console.error('Failed to load more', err))
}
return (
<View style={{flex: 1}}>
{view.isLoading && !view.isRefreshing && !view.hasContent && (
<Text>Loading...</Text>
)}
{view.hasError && (
<ErrorMessage
dark
message={view.error}
style={{margin: 6}}
onPressTryAgain={onPressTryAgain}
/>
)}
{view.hasContent && (
<FlatList
data={view.notifications}
keyExtractor={item => item._reactKey}
renderItem={renderItem}
refreshing={view.isRefreshing}
onRefresh={onRefresh}
onEndReached={onEndReached}
/>
)}
{view.isEmpty && (
<EmptyState icon="bell" message="No notifications yet!" />
)}
</View>
)
})
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