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import React, {useEffect} from 'react'
import {StyleSheet, TouchableOpacity, View} from 'react-native'
import {observer} from 'mobx-react-lite'
import useAppState from 'react-native-appstate-hook'
import LinearGradient from 'react-native-linear-gradient'
import {useSafeAreaInsets} from 'react-native-safe-area-context'
import {ViewHeader} from '../com/util/ViewHeader'
import {Feed} from '../com/posts/Feed'
import {Text} from '../com/util/text/Text'
import {FAB} from '../com/util/FAB'
import {useStores} from '../../state'
import {ScreenParams} from '../routes'
import {s, colors, gradients} from '../lib/styles'
import {useOnMainScroll} from '../lib/hooks/useOnMainScroll'
import {clamp} from 'lodash'
const HITSLOP = {left: 20, top: 20, right: 20, bottom: 20}
export const Home = observer(function Home({
navIdx,
visible,
scrollElRef,
}: ScreenParams) {
const store = useStores()
const onMainScroll = useOnMainScroll(store)
const safeAreaInsets = useSafeAreaInsets()
const [wasVisible, setWasVisible] = React.useState<boolean>(false)
const {appState} = useAppState({
onForeground: () => doPoll(true),
})
const doPoll = React.useCallback(
(knownActive = false) => {
if ((!knownActive && appState !== 'active') || !visible) {
return
}
if (store.me.mainFeed.isLoading) {
return
}
store.log.debug('Polling home feed')
store.me.mainFeed.checkForLatest().catch(e => {
store.log.error('Failed to poll feed', e)
})
},
[appState, visible, store],
)
useEffect(() => {
const feedCleanup = store.me.mainFeed.registerListeners()
const pollInterval = setInterval(() => doPoll(), 15e3)
const cleanup = () => {
clearInterval(pollInterval)
feedCleanup()
}
if (!visible) {
setWasVisible(false)
return cleanup
} else if (wasVisible) {
return cleanup
}
setWasVisible(true)
store.nav.setTitle(navIdx, 'Home')
store.log.debug('Updating home feed')
if (store.me.mainFeed.hasContent) {
store.me.mainFeed.update()
} else {
store.me.mainFeed.setup()
}
return cleanup
}, [visible, store, navIdx, doPoll, wasVisible])
const onPressCompose = (imagesOpen?: boolean) => {
store.shell.openComposer({imagesOpen})
}
const onPressTryAgain = () => {
store.me.mainFeed.refresh()
}
const onPressLoadLatest = () => {
store.me.mainFeed.refresh()
scrollElRef?.current?.scrollToOffset({offset: 0})
}
return (
<View style={s.flex1}>
<ViewHeader title="Bluesky" subtitle="Private Beta" canGoBack={false} />
<Feed
testID="homeFeed"
key="default"
feed={store.me.mainFeed}
scrollElRef={scrollElRef}
style={{flex: 1}}
onPressCompose={onPressCompose}
onPressTryAgain={onPressTryAgain}
onScroll={onMainScroll}
/>
{store.me.mainFeed.hasNewLatest && !store.me.mainFeed.isRefreshing ? (
<TouchableOpacity
style={[
styles.loadLatest,
store.shell.minimalShellMode
? {bottom: 35}
: {bottom: 60 + clamp(safeAreaInsets.bottom, 15, 30)},
]}
onPress={onPressLoadLatest}
hitSlop={HITSLOP}>
<LinearGradient
colors={[gradients.blueLight.start, gradients.blueLight.end]}
start={{x: 0, y: 0}}
end={{x: 1, y: 1}}
style={styles.loadLatestInner}>
<Text type="md-bold" style={styles.loadLatestText}>
Load new posts
</Text>
</LinearGradient>
</TouchableOpacity>
) : undefined}
<FAB icon="pen-nib" onPress={() => onPressCompose(false)} />
</View>
)
})
const styles = StyleSheet.create({
loadLatest: {
position: 'absolute',
left: 20,
shadowColor: '#000',
shadowOpacity: 0.3,
shadowOffset: {width: 0, height: 1},
},
loadLatestInner: {
flexDirection: 'row',
paddingHorizontal: 14,
paddingVertical: 10,
borderRadius: 30,
},
loadLatestText: {
color: colors.white,
},
})
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