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import {useCallback, useEffect, useMemo, useRef, useState} from 'react'
import {View} from 'react-native'
import {type AppBskyActorDefs, AppBskyFeedDefs} from '@atproto/api'
import {msg} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {type NavigationProp, useNavigation} from '@react-navigation/native'
import {useQueryClient} from '@tanstack/react-query'
import {DISCOVER_FEED_URI, VIDEO_FEED_URIS} from '#/lib/constants'
import {useOpenComposer} from '#/lib/hooks/useOpenComposer'
import {ComposeIcon2} from '#/lib/icons'
import {getRootNavigation, getTabState, TabState} from '#/lib/routes/helpers'
import {type AllNavigatorParams} from '#/lib/routes/types'
import {logEvent} from '#/lib/statsig/statsig'
import {s} from '#/lib/styles'
import {isNative} from '#/platform/detection'
import {listenSoftReset} from '#/state/events'
import {FeedFeedbackProvider, useFeedFeedback} from '#/state/feed-feedback'
import {useSetHomeBadge} from '#/state/home-badge'
import {type FeedSourceInfo} from '#/state/queries/feed'
import {
type FeedDescriptor,
type FeedParams,
RQKEY as FEED_RQKEY,
} from '#/state/queries/post-feed'
import {truncateAndInvalidate} from '#/state/queries/util'
import {useSession} from '#/state/session'
import {useSetMinimalShellMode} from '#/state/shell'
import {useHeaderOffset} from '#/components/hooks/useHeaderOffset'
import {PostFeed} from '../posts/PostFeed'
import {FAB} from '../util/fab/FAB'
import {type ListMethods} from '../util/List'
import {LoadLatestBtn} from '../util/load-latest/LoadLatestBtn'
import {MainScrollProvider} from '../util/MainScrollProvider'
const POLL_FREQ = 60e3 // 60sec
export function FeedPage({
testID,
isPageFocused,
isPageAdjacent,
feed,
feedParams,
renderEmptyState,
renderEndOfFeed,
savedFeedConfig,
feedInfo,
}: {
testID?: string
feed: FeedDescriptor
feedParams?: FeedParams
isPageFocused: boolean
isPageAdjacent: boolean
renderEmptyState: () => JSX.Element
renderEndOfFeed?: () => JSX.Element
savedFeedConfig?: AppBskyActorDefs.SavedFeed
feedInfo: FeedSourceInfo
}) {
const {hasSession} = useSession()
const {_} = useLingui()
const navigation = useNavigation<NavigationProp<AllNavigatorParams>>()
const queryClient = useQueryClient()
const {openComposer} = useOpenComposer()
const [isScrolledDown, setIsScrolledDown] = useState(false)
const setMinimalShellMode = useSetMinimalShellMode()
const headerOffset = useHeaderOffset()
const feedFeedback = useFeedFeedback(feedInfo, hasSession)
const scrollElRef = useRef<ListMethods>(null)
const [hasNew, setHasNew] = useState(false)
const setHomeBadge = useSetHomeBadge()
const isVideoFeed = useMemo(() => {
const isBskyVideoFeed = VIDEO_FEED_URIS.includes(feedInfo.uri)
const feedIsVideoMode =
feedInfo.contentMode === AppBskyFeedDefs.CONTENTMODEVIDEO
const _isVideoFeed = isBskyVideoFeed || feedIsVideoMode
return isNative && _isVideoFeed
}, [feedInfo])
useEffect(() => {
if (isPageFocused) {
setHomeBadge(hasNew)
}
}, [isPageFocused, hasNew, setHomeBadge])
const scrollToTop = useCallback(() => {
scrollElRef.current?.scrollToOffset({
animated: isNative,
offset: -headerOffset,
})
setMinimalShellMode(false)
}, [headerOffset, setMinimalShellMode])
const onSoftReset = useCallback(() => {
const isScreenFocused =
getTabState(getRootNavigation(navigation).getState(), 'Home') ===
TabState.InsideAtRoot
if (isScreenFocused && isPageFocused) {
scrollToTop()
truncateAndInvalidate(queryClient, FEED_RQKEY(feed))
setHasNew(false)
logEvent('feed:refresh', {
feedType: feed.split('|')[0],
feedUrl: feed,
reason: 'soft-reset',
})
}
}, [navigation, isPageFocused, scrollToTop, queryClient, feed])
// fires when page within screen is activated/deactivated
useEffect(() => {
if (!isPageFocused) {
return
}
return listenSoftReset(onSoftReset)
}, [onSoftReset, isPageFocused])
const onPressCompose = useCallback(() => {
openComposer({})
}, [openComposer])
const onPressLoadLatest = useCallback(() => {
scrollToTop()
truncateAndInvalidate(queryClient, FEED_RQKEY(feed))
setHasNew(false)
logEvent('feed:refresh', {
feedType: feed.split('|')[0],
feedUrl: feed,
reason: 'load-latest',
})
}, [scrollToTop, feed, queryClient])
const shouldPrefetch = isNative && isPageAdjacent
const isDiscoverFeed = feedInfo.uri === DISCOVER_FEED_URI
return (
<View
testID={testID}
// @ts-expect-error web only -sfn
dataSet={{nosnippet: isDiscoverFeed ? '' : undefined}}>
<MainScrollProvider>
<FeedFeedbackProvider value={feedFeedback}>
<PostFeed
testID={testID ? `${testID}-feed` : undefined}
enabled={isPageFocused || shouldPrefetch}
feed={feed}
feedParams={feedParams}
pollInterval={POLL_FREQ}
disablePoll={hasNew || !isPageFocused}
scrollElRef={scrollElRef}
onScrolledDownChange={setIsScrolledDown}
onHasNew={setHasNew}
renderEmptyState={renderEmptyState}
renderEndOfFeed={renderEndOfFeed}
headerOffset={headerOffset}
savedFeedConfig={savedFeedConfig}
isVideoFeed={isVideoFeed}
/>
</FeedFeedbackProvider>
</MainScrollProvider>
{(isScrolledDown || hasNew) && (
<LoadLatestBtn
onPress={onPressLoadLatest}
label={_(msg`Load new posts`)}
showIndicator={hasNew}
/>
)}
{hasSession && (
<FAB
testID="composeFAB"
onPress={onPressCompose}
icon={<ComposeIcon2 strokeWidth={1.5} size={29} style={s.white} />}
accessibilityRole="button"
accessibilityLabel={_(msg({message: `New post`, context: 'action'}))}
accessibilityHint=""
/>
)}
</View>
)
}
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