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import React, {useMemo, useRef} from 'react'
import {NativeStackScreenProps} from '@react-navigation/native-stack'
import {usePalette} from 'lib/hooks/usePalette'
import {HeartIcon, HeartIconSolid} from 'lib/icons'
import {CommonNavigatorParams} from 'lib/routes/types'
import {makeRecordUri} from 'lib/strings/url-helpers'
import {colors, s} from 'lib/styles'
import {observer} from 'mobx-react-lite'
import {FlatList, StyleSheet, View} from 'react-native'
import {useStores} from 'state/index'
import {PostsFeedModel} from 'state/models/feeds/posts'
import {useCustomFeed} from 'lib/hooks/useCustomFeed'
import {withAuthRequired} from 'view/com/auth/withAuthRequired'
import {Feed} from 'view/com/posts/Feed'
import {pluralize} from 'lib/strings/helpers'
import {TextLink} from 'view/com/util/Link'
import {UserAvatar} from 'view/com/util/UserAvatar'
import {ViewHeader} from 'view/com/util/ViewHeader'
import {Button} from 'view/com/util/forms/Button'
import {Text} from 'view/com/util/text/Text'
import * as Toast from 'view/com/util/Toast'
import {isDesktopWeb} from 'platform/detection'
type Props = NativeStackScreenProps<CommonNavigatorParams, 'CustomFeed'>
export const CustomFeedScreen = withAuthRequired(
observer(({route}: Props) => {
const store = useStores()
const pal = usePalette('default')
const {rkey, name} = route.params
const uri = useMemo(
() => makeRecordUri(name, 'app.bsky.feed.generator', rkey),
[rkey, name],
)
const scrollElRef = useRef<FlatList>(null)
const currentFeed = useCustomFeed(uri)
const algoFeed: PostsFeedModel = useMemo(() => {
const feed = new PostsFeedModel(store, 'custom', {
feed: uri,
})
feed.setup()
return feed
}, [store, uri])
const onToggleSaved = React.useCallback(async () => {
try {
if (currentFeed?.isSaved) {
await currentFeed?.unsave()
} else {
await currentFeed?.save()
}
} catch (err) {
Toast.show(
'There was an an issue updating your feeds, please check your internet connection and try again.',
)
store.log.error('Failed up update feeds', {err})
}
}, [store, currentFeed])
const onToggleLiked = React.useCallback(async () => {
try {
if (currentFeed?.isLiked) {
await currentFeed?.unlike()
} else {
await currentFeed?.like()
}
} catch (err) {
Toast.show(
'There was an an issue contacting the server, please check your internet connection and try again.',
)
store.log.error('Failed up toggle like', {err})
}
}, [store, currentFeed])
const renderHeaderBtns = React.useCallback(() => {
return (
<View style={styles.headerBtns}>
<Button
type="default"
testID="toggleLikeBtn"
accessibilityLabel="Like this feed"
accessibilityHint=""
onPress={onToggleLiked}>
{currentFeed?.isLiked ? (
<HeartIconSolid size={18} style={styles.liked} />
) : (
<HeartIcon strokeWidth={3} size={18} style={pal.textLight} />
)}
</Button>
<Button
type={currentFeed?.isSaved ? 'default' : 'inverted'}
onPress={onToggleSaved}
accessibilityLabel={
currentFeed?.isSaved ? 'Remove from my feeds' : 'Add to my feeds'
}
accessibilityHint=""
label={
currentFeed?.isSaved ? 'Remove from My Feeds' : 'Add to My Feeds'
}
/>
</View>
)
}, [
pal,
currentFeed?.isSaved,
currentFeed?.isLiked,
onToggleSaved,
onToggleLiked,
])
const renderListHeaderComponent = React.useCallback(() => {
return (
<>
<View style={[styles.header, pal.border]}>
<View style={s.flex1}>
<Text
testID="feedName"
type="title-xl"
style={[pal.text, s.bold]}>
{currentFeed?.displayName}
</Text>
{currentFeed && (
<Text type="md" style={[pal.textLight]} numberOfLines={1}>
by{' '}
{currentFeed.data.creator.did === store.me.did ? (
'you'
) : (
<TextLink
text={`@${currentFeed.data.creator.handle}`}
href={`/profile/${currentFeed.data.creator.did}`}
/>
)}
</Text>
)}
</View>
<View>
<UserAvatar
type="algo"
avatar={currentFeed?.data.avatar}
size={64}
/>
</View>
</View>
<View style={styles.headerDetails}>
{currentFeed?.data.description ? (
<Text style={[pal.text, s.mb10]} numberOfLines={6}>
{currentFeed.data.description}
</Text>
) : null}
<TextLink
type="md-medium"
style={pal.textLight}
href={`/profile/${name}/feed/${rkey}/liked-by`}
text={`Liked by ${currentFeed?.data.likeCount} ${pluralize(
currentFeed?.data.likeCount || 0,
'user',
)}`}
/>
{isDesktopWeb && (
<View style={styles.headerBtns}>
<Button
type={currentFeed?.isSaved ? 'default' : 'inverted'}
onPress={onToggleSaved}
accessibilityLabel={
currentFeed?.isSaved ? 'Unsave this feed' : 'Save this feed'
}
accessibilityHint=""
label={currentFeed?.isSaved ? 'Unsave' : 'Save'}
/>
<Button type="default" onPress={onToggleLiked}>
{currentFeed?.isLiked ? (
<HeartIconSolid size={18} style={styles.liked} />
) : (
<HeartIcon strokeWidth={3} size={18} style={pal.icon} />
)}
</Button>
</View>
)}
</View>
<View style={[styles.fakeSelector, pal.border]}>
<View
style={[styles.fakeSelectorItem, {borderColor: pal.colors.link}]}>
<Text type="md-medium" style={[pal.text]}>
Feed
</Text>
</View>
</View>
</>
)
}, [store.me.did, pal, currentFeed, onToggleLiked, onToggleSaved])
return (
<View style={s.hContentRegion}>
<ViewHeader title="" renderButton={renderHeaderBtns} />
<Feed
scrollElRef={scrollElRef}
feed={algoFeed}
ListHeaderComponent={renderListHeaderComponent}
extraData={uri}
/>
</View>
)
}),
)
const styles = StyleSheet.create({
headerBtns: {
flexDirection: 'row',
gap: 8,
},
header: {
flexDirection: 'row',
gap: 12,
paddingHorizontal: 16,
paddingTop: 12,
paddingBottom: 16,
borderTopWidth: 1,
},
headerDetails: {
paddingHorizontal: 16,
paddingBottom: 16,
},
fakeSelector: {
flexDirection: 'row',
paddingHorizontal: isDesktopWeb ? 16 : 6,
},
fakeSelectorItem: {
paddingHorizontal: 12,
paddingBottom: 8,
borderBottomWidth: 3,
},
liked: {
color: colors.red3,
},
})
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