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import {useState} from 'react'
import {type ListRenderItemInfo, View} from 'react-native'
import {KeyboardAwareScrollView} from 'react-native-keyboard-controller'
import {type AppBskyFeedDefs, type ModerationOpts} from '@atproto/api'
import {Trans} from '@lingui/macro'
import {DISCOVER_FEED_URI} from '#/lib/constants'
import {useA11y} from '#/state/a11y'
import {
useGetPopularFeedsQuery,
usePopularFeedsSearch,
useSavedFeeds,
} from '#/state/queries/feed'
import {List} from '#/view/com/util/List'
import {useWizardState} from '#/screens/StarterPack/Wizard/State'
import {atoms as a, useTheme} from '#/alf'
import {SearchInput} from '#/components/forms/SearchInput'
import {useThrottledValue} from '#/components/hooks/useThrottledValue'
import {Loader} from '#/components/Loader'
import {ScreenTransition} from '#/components/StarterPack/Wizard/ScreenTransition'
import {WizardFeedCard} from '#/components/StarterPack/Wizard/WizardListCard'
import {Text} from '#/components/Typography'
function keyExtractor(item: AppBskyFeedDefs.GeneratorView) {
return item.uri
}
export function StepFeeds({moderationOpts}: {moderationOpts: ModerationOpts}) {
const t = useTheme()
const [state, dispatch] = useWizardState()
const [query, setQuery] = useState('')
const throttledQuery = useThrottledValue(query, 500)
const {screenReaderEnabled} = useA11y()
const {data: savedFeedsAndLists, isFetchedAfterMount: isFetchedSavedFeeds} =
useSavedFeeds()
const savedFeeds = savedFeedsAndLists?.feeds
.filter(f => f.type === 'feed' && f.view.uri !== DISCOVER_FEED_URI)
.map(f => f.view) as AppBskyFeedDefs.GeneratorView[]
const {
data: popularFeedsPages,
fetchNextPage,
isLoading: isLoadingPopularFeeds,
} = useGetPopularFeedsQuery({
limit: 30,
})
const popularFeeds = popularFeedsPages?.pages.flatMap(p => p.feeds) ?? []
// If we have saved feeds already loaded, display them immediately
// Then, when popular feeds have loaded we can concat them to the saved feeds
const suggestedFeeds =
savedFeeds || isFetchedSavedFeeds
? popularFeeds
? savedFeeds.concat(
popularFeeds.filter(f => !savedFeeds.some(sf => sf.uri === f.uri)),
)
: savedFeeds
: undefined
const {data: searchedFeeds, isFetching: isFetchingSearchedFeeds} =
usePopularFeedsSearch({query: throttledQuery})
const isLoading =
!isFetchedSavedFeeds || isLoadingPopularFeeds || isFetchingSearchedFeeds
const renderItem = ({
item,
}: ListRenderItemInfo<AppBskyFeedDefs.GeneratorView>) => {
return (
<WizardFeedCard
generator={item}
btnType="checkbox"
state={state}
dispatch={dispatch}
moderationOpts={moderationOpts}
/>
)
}
return (
<ScreenTransition style={[a.flex_1]} direction={state.transitionDirection}>
<View style={[a.border_b, t.atoms.border_contrast_medium]}>
<View style={[a.py_sm, a.px_md, {height: 60}]}>
<SearchInput
value={query}
onChangeText={t => setQuery(t)}
onClearText={() => setQuery('')}
/>
</View>
</View>
<List
data={query ? searchedFeeds : suggestedFeeds}
renderItem={renderItem}
keyExtractor={keyExtractor}
onEndReached={
!query && !screenReaderEnabled ? () => fetchNextPage() : undefined
}
onEndReachedThreshold={2}
keyboardDismissMode="on-drag"
renderScrollComponent={props => <KeyboardAwareScrollView {...props} />}
keyboardShouldPersistTaps="handled"
disableFullWindowScroll={true}
sideBorders={false}
style={{flex: 1}}
ListEmptyComponent={
<View style={[a.flex_1, a.align_center, a.mt_lg, a.px_lg]}>
{isLoading ? (
<Loader size="lg" />
) : (
<Text
style={[
a.font_bold,
a.text_lg,
a.text_center,
a.mt_lg,
a.leading_snug,
]}>
<Trans>No feeds found. Try searching for something else.</Trans>
</Text>
)}
</View>
}
/>
</ScreenTransition>
)
}
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