bsky-app/src/view/screens/Profile.tsx

import React, {useEffect, useState} from 'react'
import {ActivityIndicator, StyleSheet, View} from 'react-native'
import {observer} from 'mobx-react-lite'
import {useFocusEffect} from '@react-navigation/native'
import {NativeStackScreenProps, CommonNavigatorParams} from 'lib/routes/types'
import {withAuthRequired} from 'view/com/auth/withAuthRequired'
import {ViewSelector, ViewSelectorHandle} from '../com/util/ViewSelector'
import {CenteredView} from '../com/util/Views'
import {ScreenHider} from 'view/com/util/moderation/ScreenHider'
import {ProfileUiModel, Sections} from 'state/models/ui/profile'
import {useStores} from 'state/index'
import {PostsFeedSliceModel} from 'state/models/feeds/posts-slice'
import {ProfileHeader} from '../com/profile/ProfileHeader'
import {FeedSlice} from '../com/posts/FeedSlice'
import {ListCard} from 'view/com/lists/ListCard'
import {
  PostFeedLoadingPlaceholder,
  ProfileCardFeedLoadingPlaceholder,
} from '../com/util/LoadingPlaceholder'
import {ErrorScreen} from '../com/util/error/ErrorScreen'
import {ErrorMessage} from '../com/util/error/ErrorMessage'
import {EmptyState} from '../com/util/EmptyState'
import {Text} from '../com/util/text/Text'
import {FAB} from '../com/util/fab/FAB'
import {s, colors} from 'lib/styles'
import {useAnalytics} from 'lib/analytics/analytics'
import {ComposeIcon2} from 'lib/icons'
import {CustomFeed} from 'view/com/feeds/CustomFeed'
import {CustomFeedModel} from 'state/models/feeds/custom-feed'
import {useSetTitle} from 'lib/hooks/useSetTitle'
import {combinedDisplayName} from 'lib/strings/display-names'

type Props = NativeStackScreenProps<CommonNavigatorParams, 'Profile'>
export const ProfileScreen = withAuthRequired(
  observer(({route}: Props) => {
    const store = useStores()
    const {screen, track} = useAnalytics()
    const viewSelectorRef = React.useRef<ViewSelectorHandle>(null)

    useEffect(() => {
      screen('Profile')
    }, [screen])

    const [hasSetup, setHasSetup] = useState<boolean>(false)
    const uiState = React.useMemo(
      () => new ProfileUiModel(store, {user: route.params.name}),
      [route.params.name, store],
    )
    useSetTitle(combinedDisplayName(uiState.profile))

    const onSoftReset = React.useCallback(() => {
      viewSelectorRef.current?.scrollToTop()
    }, [])

    useEffect(() => {
      setHasSetup(false)
    }, [route.params.name])

    useFocusEffect(
      React.useCallback(() => {
        const softResetSub = store.onScreenSoftReset(onSoftReset)
        let aborted = false
        store.shell.setMinimalShellMode(false)
        const feedCleanup = uiState.feed.registerListeners()
        if (hasSetup) {
          uiState.update()
        } else {
          uiState.setup().then(() => {
            if (aborted) {
              return
            }
            setHasSetup(true)
          })
        }
        return () => {
          aborted = true
          feedCleanup()
          softResetSub.remove()
        }
      }, [store, onSoftReset, uiState, hasSetup]),
    )

    // events
    // =

    const onPressCompose = React.useCallback(() => {
      track('ProfileScreen:PressCompose')
      store.shell.openComposer({})
    }, [store, track])
    const onSelectView = React.useCallback(
      (index: number) => {
        uiState.setSelectedViewIndex(index)
      },
      [uiState],
    )
    const onRefresh = React.useCallback(() => {
      uiState
        .refresh()
        .catch((err: any) =>
          store.log.error('Failed to refresh user profile', err),
        )
    }, [uiState, store])
    const onEndReached = React.useCallback(() => {
      uiState
        .loadMore()
        .catch((err: any) =>
          store.log.error('Failed to load more entries in user profile', err),
        )
    }, [uiState, store])
    const onPressTryAgain = React.useCallback(() => {
      uiState.setup()
    }, [uiState])

    // rendering
    // =

    const renderHeader = React.useCallback(() => {
      if (!uiState) {
        return <View />
      }
      return (
        <ProfileHeader
          view={uiState.profile}
          onRefreshAll={onRefresh}
          hideBackButton={route.params.hideBackButton}
        />
      )
    }, [uiState, onRefresh, route.params.hideBackButton])
    const Footer = React.useMemo(() => {
      return uiState.showLoadingMoreFooter ? LoadingMoreFooter : undefined
    }, [uiState.showLoadingMoreFooter])
    const renderItem = React.useCallback(
      (item: any) => {
        // if section is lists
        if (uiState.selectedView === Sections.Lists) {
          if (item === ProfileUiModel.LOADING_ITEM) {
            return <ProfileCardFeedLoadingPlaceholder />
          } else if (item._reactKey === '__error__') {
            return (
              <View style={s.p5}>
                <ErrorMessage
                  message={item.error}
                  onPressTryAgain={onPressTryAgain}
                />
              </View>
            )
          } else if (item === ProfileUiModel.EMPTY_ITEM) {
            return (
              <EmptyState
                testID="listsEmpty"
                icon="list-ul"
                message="No lists yet!"
                style={styles.emptyState}
              />
            )
          } else {
            return <ListCard testID={`list-${item.name}`} list={item} />
          }
          // if section is custom algorithms
        } else if (uiState.selectedView === Sections.CustomAlgorithms) {
          if (item === ProfileUiModel.LOADING_ITEM) {
            return <ProfileCardFeedLoadingPlaceholder />
          } else if (item._reactKey === '__error__') {
            return (
              <View style={s.p5}>
                <ErrorMessage
                  message={item.error}
                  onPressTryAgain={onPressTryAgain}
                />
              </View>
            )
          } else if (item === ProfileUiModel.EMPTY_ITEM) {
            return (
              <EmptyState
                testID="customAlgorithmsEmpty"
                icon="list-ul"
                message="No custom algorithms yet!"
                style={styles.emptyState}
              />
            )
          } else if (item instanceof CustomFeedModel) {
            return <CustomFeed item={item} showSaveBtn showLikes />
          }
          // if section is posts or posts & replies
        } else {
          if (item === ProfileUiModel.END_ITEM) {
            return <Text style={styles.endItem}>- end of feed -</Text>
          } else if (item === ProfileUiModel.LOADING_ITEM) {
            return <PostFeedLoadingPlaceholder />
          } else if (item._reactKey === '__error__') {
            if (uiState.feed.isBlocking) {
              return (
                <EmptyState
                  icon="ban"
                  message="Posts hidden"
                  style={styles.emptyState}
                />
              )
            }
            if (uiState.feed.isBlockedBy) {
              return (
                <EmptyState
                  icon="ban"
                  message="Posts hidden"
                  style={styles.emptyState}
                />
              )
            }
            return (
              <View style={s.p5}>
                <ErrorMessage
                  message={item.error}
                  onPressTryAgain={onPressTryAgain}
                />
              </View>
            )
          } else if (item === ProfileUiModel.EMPTY_ITEM) {
            return (
              <EmptyState
                icon={['far', 'message']}
                message="No posts yet!"
                style={styles.emptyState}
              />
            )
          } else if (item instanceof PostsFeedSliceModel) {
            return (
              <FeedSlice slice={item} ignoreMuteFor={uiState.profile.did} />
            )
          }
        }
        return <View />
      },
      [
        onPressTryAgain,
        uiState.selectedView,
        uiState.profile.did,
        uiState.feed.isBlocking,
        uiState.feed.isBlockedBy,
      ],
    )

    return (
      <ScreenHider
        testID="profileView"
        style={styles.container}
        screenDescription="profile"
        moderation={uiState.profile.moderation.view}>
        {uiState.profile.hasError ? (
          <ErrorScreen
            testID="profileErrorScreen"
            title="Failed to load profile"
            message={uiState.profile.error}
            onPressTryAgain={onPressTryAgain}
          />
        ) : uiState.profile.hasLoaded ? (
          <ViewSelector
            ref={viewSelectorRef}
            swipeEnabled={false}
            sections={uiState.selectorItems}
            items={uiState.uiItems}
            renderHeader={renderHeader}
            renderItem={renderItem}
            ListFooterComponent={Footer}
            refreshing={uiState.isRefreshing || false}
            onSelectView={onSelectView}
            onRefresh={onRefresh}
            onEndReached={onEndReached}
          />
        ) : (
          <CenteredView>{renderHeader()}</CenteredView>
        )}
        <FAB
          testID="composeFAB"
          onPress={onPressCompose}
          icon={<ComposeIcon2 strokeWidth={1.5} size={29} style={s.white} />}
          accessibilityRole="button"
          accessibilityLabel="Compose post"
          accessibilityHint=""
        />
      </ScreenHider>
    )
  }),
)

function LoadingMoreFooter() {
  return (
    <View style={styles.loadingMoreFooter}>
      <ActivityIndicator />
    </View>
  )
}

const styles = StyleSheet.create({
  container: {
    flexDirection: 'column',
    height: '100%',
  },
  loading: {
    paddingVertical: 10,
    paddingHorizontal: 14,
  },
  emptyState: {
    paddingVertical: 40,
  },
  loadingMoreFooter: {
    paddingVertical: 20,
  },
  endItem: {
    paddingTop: 20,
    paddingBottom: 30,
    color: colors.gray5,
    textAlign: 'center',
  },
})