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import React from 'react'
import {ListRenderItemInfo, View} from 'react-native'
import {PostView} from '@atproto/api/dist/client/types/app/bsky/feed/defs'
import {msg} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {useFocusEffect} from '@react-navigation/native'
import {NativeStackScreenProps} from '@react-navigation/native-stack'
import {HITSLOP_10} from '#/lib/constants'
import {useInitialNumToRender} from '#/lib/hooks/useInitialNumToRender'
import {CommonNavigatorParams} from '#/lib/routes/types'
import {shareUrl} from '#/lib/sharing'
import {cleanError} from '#/lib/strings/errors'
import {sanitizeHandle} from '#/lib/strings/handles'
import {enforceLen} from '#/lib/strings/helpers'
import {useSearchPostsQuery} from '#/state/queries/search-posts'
import {useSetMinimalShellMode} from '#/state/shell'
import {Pager} from '#/view/com/pager/Pager'
import {TabBar} from '#/view/com/pager/TabBar'
import {Post} from '#/view/com/post/Post'
import {List} from '#/view/com/util/List'
import {atoms as a, web} from '#/alf'
import {Button, ButtonIcon} from '#/components/Button'
import {ArrowOutOfBox_Stroke2_Corner0_Rounded as Share} from '#/components/icons/ArrowOutOfBox'
import * as Layout from '#/components/Layout'
import {ListFooter, ListMaybePlaceholder} from '#/components/Lists'
const renderItem = ({item}: ListRenderItemInfo<PostView>) => {
return <Post post={item} />
}
const keyExtractor = (item: PostView, index: number) => {
return `${item.uri}-${index}`
}
export default function HashtagScreen({
route,
}: NativeStackScreenProps<CommonNavigatorParams, 'Hashtag'>) {
const {tag, author} = route.params
const {_} = useLingui()
const fullTag = React.useMemo(() => {
return `#${decodeURIComponent(tag)}`
}, [tag])
const headerTitle = React.useMemo(() => {
return enforceLen(fullTag.toLowerCase(), 24, true, 'middle')
}, [fullTag])
const sanitizedAuthor = React.useMemo(() => {
if (!author) return
return sanitizeHandle(author)
}, [author])
const onShare = React.useCallback(() => {
const url = new URL('https://bsky.app')
url.pathname = `/hashtag/${decodeURIComponent(tag)}`
if (author) {
url.searchParams.set('author', author)
}
shareUrl(url.toString())
}, [tag, author])
const [activeTab, setActiveTab] = React.useState(0)
const setMinimalShellMode = useSetMinimalShellMode()
useFocusEffect(
React.useCallback(() => {
setMinimalShellMode(false)
}, [setMinimalShellMode]),
)
const onPageSelected = React.useCallback(
(index: number) => {
setMinimalShellMode(false)
setActiveTab(index)
},
[setMinimalShellMode],
)
const sections = React.useMemo(() => {
return [
{
title: _(msg`Top`),
component: (
<HashtagScreenTab
fullTag={fullTag}
author={author}
sort="top"
active={activeTab === 0}
/>
),
},
{
title: _(msg`Latest`),
component: (
<HashtagScreenTab
fullTag={fullTag}
author={author}
sort="latest"
active={activeTab === 1}
/>
),
},
]
}, [_, fullTag, author, activeTab])
return (
<Layout.Screen>
<Pager
onPageSelected={onPageSelected}
renderTabBar={props => (
<Layout.Center style={[a.z_10, web([a.sticky, {top: 0}])]}>
<Layout.Header.Outer noBottomBorder>
<Layout.Header.BackButton />
<Layout.Header.Content>
<Layout.Header.TitleText>{headerTitle}</Layout.Header.TitleText>
{author && (
<Layout.Header.SubtitleText>
{_(msg`From @${sanitizedAuthor}`)}
</Layout.Header.SubtitleText>
)}
</Layout.Header.Content>
<Layout.Header.Slot>
<Button
label={_(msg`Share`)}
size="small"
variant="ghost"
color="primary"
shape="round"
onPress={onShare}
hitSlop={HITSLOP_10}
style={[{right: -3}]}>
<ButtonIcon icon={Share} size="md" />
</Button>
</Layout.Header.Slot>
</Layout.Header.Outer>
<TabBar items={sections.map(section => section.title)} {...props} />
</Layout.Center>
)}
initialPage={0}>
{sections.map((section, i) => (
<View key={i}>{section.component}</View>
))}
</Pager>
</Layout.Screen>
)
}
function HashtagScreenTab({
fullTag,
author,
sort,
active,
}: {
fullTag: string
author: string | undefined
sort: 'top' | 'latest'
active: boolean
}) {
const {_} = useLingui()
const initialNumToRender = useInitialNumToRender()
const [isPTR, setIsPTR] = React.useState(false)
const queryParam = React.useMemo(() => {
if (!author) return fullTag
return `${fullTag} from:${author}`
}, [fullTag, author])
const {
data,
isFetched,
isFetchingNextPage,
isLoading,
isError,
error,
refetch,
fetchNextPage,
hasNextPage,
} = useSearchPostsQuery({query: queryParam, sort, enabled: active})
const posts = React.useMemo(() => {
return data?.pages.flatMap(page => page.posts) || []
}, [data])
const onRefresh = React.useCallback(async () => {
setIsPTR(true)
await refetch()
setIsPTR(false)
}, [refetch])
const onEndReached = React.useCallback(() => {
if (isFetchingNextPage || !hasNextPage || error) return
fetchNextPage()
}, [isFetchingNextPage, hasNextPage, error, fetchNextPage])
return (
<>
{posts.length < 1 ? (
<ListMaybePlaceholder
isLoading={isLoading || !isFetched}
isError={isError}
onRetry={refetch}
emptyType="results"
emptyMessage={_(msg`We couldn't find any results for that hashtag.`)}
/>
) : (
<List
data={posts}
renderItem={renderItem}
keyExtractor={keyExtractor}
refreshing={isPTR}
onRefresh={onRefresh}
onEndReached={onEndReached}
onEndReachedThreshold={4}
// @ts-ignore web only -prf
desktopFixedHeight
ListFooterComponent={
<ListFooter
isFetchingNextPage={isFetchingNextPage}
error={cleanError(error)}
onRetry={fetchNextPage}
/>
}
initialNumToRender={initialNumToRender}
windowSize={11}
/>
)}
</>
)
}
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