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import React from 'react'
import {StyleSheet, TouchableOpacity, View} from 'react-native'
import {AppBskyActorDefs} from '@atproto/api'
import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
import {msg, Trans} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {useNavigation} from '@react-navigation/native'
import {useGate} from '#/lib/statsig/statsig'
import {logger} from '#/logger'
import {track} from 'lib/analytics/analytics'
import {usePalette} from 'lib/hooks/usePalette'
import {useWebMediaQueries} from 'lib/hooks/useWebMediaQueries'
import {s} from 'lib/styles'
import {Shadow, useProfileShadow} from 'state/cache/profile-shadow'
import {
useProfileFollowMutationQueue,
useProfileQuery,
} from 'state/queries/profile'
import {useRequireAuth} from 'state/session'
import {Text} from 'view/com/util/text/Text'
import * as Toast from 'view/com/util/Toast'
export function PostThreadFollowBtn({did}: {did: string}) {
const {data: profile, isLoading} = useProfileQuery({did})
// We will never hit this - the profile will always be cached or loaded above
// but it keeps the typechecker happy
if (isLoading || !profile) return null
return <PostThreadFollowBtnLoaded profile={profile} />
}
function PostThreadFollowBtnLoaded({
profile: profileUnshadowed,
}: {
profile: AppBskyActorDefs.ProfileViewDetailed
}) {
const navigation = useNavigation()
const {_} = useLingui()
const pal = usePalette('default')
const palInverted = usePalette('inverted')
const {isTabletOrDesktop} = useWebMediaQueries()
const profile: Shadow<AppBskyActorDefs.ProfileViewBasic> =
useProfileShadow(profileUnshadowed)
const [queueFollow, queueUnfollow] = useProfileFollowMutationQueue(
profile,
'PostThreadItem',
)
const requireAuth = useRequireAuth()
const gate = useGate()
const isFollowing = !!profile.viewer?.following
const isFollowedBy = !!profile.viewer?.followedBy
const [wasFollowing, setWasFollowing] = React.useState<boolean>(isFollowing)
// This prevents the button from disappearing as soon as we follow.
const showFollowBtn = React.useMemo(
() => !isFollowing || !wasFollowing,
[isFollowing, wasFollowing],
)
/**
* We want this button to stay visible even after following, so that the user can unfollow if they want.
* However, we need it to disappear after we push to a screen and then come back. We also need it to
* show up if we view the post while following, go to the profile and unfollow, then come back to the
* post.
*
* We want to update wasFollowing both on blur and on focus so that we hit all these cases. On native,
* we could do this only on focus because the transition animation gives us time to not notice the
* sudden rendering of the button. However, on web if we do this, there's an obvious flicker once the
* button renders. So, we update the state in both cases.
*/
React.useEffect(() => {
const updateWasFollowing = () => {
if (wasFollowing !== isFollowing) {
setWasFollowing(isFollowing)
}
}
const unsubscribeFocus = navigation.addListener('focus', updateWasFollowing)
const unsubscribeBlur = navigation.addListener('blur', updateWasFollowing)
return () => {
unsubscribeFocus()
unsubscribeBlur()
}
}, [isFollowing, wasFollowing, navigation])
const onPress = React.useCallback(() => {
if (!isFollowing) {
requireAuth(async () => {
try {
track('ProfileHeader:FollowButtonClicked')
await queueFollow()
} catch (e: any) {
if (e?.name !== 'AbortError') {
logger.error('Failed to follow', {message: String(e)})
Toast.show(_(msg`There was an issue! ${e.toString()}`), 'xmark')
}
}
})
} else {
requireAuth(async () => {
try {
track('ProfileHeader:UnfollowButtonClicked')
await queueUnfollow()
} catch (e: any) {
if (e?.name !== 'AbortError') {
logger.error('Failed to unfollow', {message: String(e)})
Toast.show(_(msg`There was an issue! ${e.toString()}`), 'xmark')
}
}
})
}
}, [isFollowing, requireAuth, queueFollow, _, queueUnfollow])
if (!showFollowBtn) return null
return (
<View style={{width: isTabletOrDesktop ? 130 : 120}}>
<View style={styles.btnOuter}>
<TouchableOpacity
testID="followBtn"
onPress={onPress}
style={[styles.btn, !isFollowing ? palInverted.view : pal.viewLight]}
accessibilityRole="button"
accessibilityLabel={_(msg`Follow ${profile.handle}`)}
accessibilityHint={_(
msg`Shows posts from ${profile.handle} in your feed`,
)}>
{isTabletOrDesktop && (
<FontAwesomeIcon
icon={!isFollowing ? 'plus' : 'check'}
style={[!isFollowing ? palInverted.text : pal.text, s.mr5]}
/>
)}
<Text
type="button"
style={[!isFollowing ? palInverted.text : pal.text, s.bold]}
numberOfLines={1}>
{!isFollowing ? (
isFollowedBy && gate('show_follow_back_label_v2') ? (
<Trans>Follow Back</Trans>
) : (
<Trans>Follow</Trans>
)
) : (
<Trans>Following</Trans>
)}
</Text>
</TouchableOpacity>
</View>
</View>
)
}
const styles = StyleSheet.create({
btnOuter: {
marginLeft: 'auto',
},
btn: {
flexDirection: 'row',
borderRadius: 50,
paddingVertical: 8,
paddingHorizontal: 14,
},
})
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