From bcad2486a9d50e7e56e69055cc3ac9c0ea189276 Mon Sep 17 00:00:00 2001
From: Eric Bailey <git@esb.lol>
Date: Sun, 26 Nov 2023 12:16:28 -0600
Subject: [PATCH] Split out home feed, wip

---
 src/view/screens/Home.tsx       |  27 +---
 src/view/screens/HomePublic.tsx | 213 ++++++++++++++++++++++++++++++++
 2 files changed, 215 insertions(+), 25 deletions(-)
 create mode 100644 src/view/screens/HomePublic.tsx

diff --git a/src/view/screens/Home.tsx b/src/view/screens/Home.tsx
index 015c436f41..30c5afecf9 100644
--- a/src/view/screens/Home.tsx
+++ b/src/view/screens/Home.tsx
@@ -14,6 +14,7 @@ import {usePreferencesQuery} from '#/state/queries/preferences'
 import {UsePreferencesQueryResponse} from '#/state/queries/preferences/types'
 import {emitSoftReset} from '#/state/events'
 import {useSession} from '#/state/session'
+import {HomePublic} from '#/view/screens/HomePublic'
 
 type Props = NativeStackScreenProps<HomeTabNavigatorParams, 'Home'>
 export function HomeScreen(props: Props) {
@@ -21,7 +22,7 @@ export function HomeScreen(props: Props) {
   const {data: preferences} = usePreferencesQuery()
 
   if (!hasSession) {
-    return <HomeScreenPublic />
+    return <HomePublic />
   }
 
   if (preferences) {
@@ -35,30 +36,6 @@ export function HomeScreen(props: Props) {
   }
 }
 
-function HomeScreenPublic() {
-  const setMinimalShellMode = useSetMinimalShellMode()
-  const setDrawerSwipeDisabled = useSetDrawerSwipeDisabled()
-
-  const renderCustomFeedEmptyState = React.useCallback(() => {
-    return <CustomFeedEmptyState />
-  }, [])
-
-  useFocusEffect(
-    React.useCallback(() => {
-      setMinimalShellMode(false)
-      setDrawerSwipeDisabled(false)
-    }, [setDrawerSwipeDisabled, setMinimalShellMode]),
-  )
-
-  return (
-    <FeedPage
-      isPageFocused
-      feed={`feedgen|at://did:plc:z72i7hdynmk6r22z27h6tvur/app.bsky.feed.generator/whats-hot`}
-      renderEmptyState={renderCustomFeedEmptyState}
-    />
-  )
-}
-
 function HomeScreenReady({
   preferences,
 }: Props & {
diff --git a/src/view/screens/HomePublic.tsx b/src/view/screens/HomePublic.tsx
new file mode 100644
index 0000000000..1d550013f2
--- /dev/null
+++ b/src/view/screens/HomePublic.tsx
@@ -0,0 +1,213 @@
+import React from 'react'
+import {View, StyleSheet, FlatList, TouchableOpacity} from 'react-native'
+import Animated from 'react-native-reanimated'
+import {useFocusEffect} from '@react-navigation/native'
+import {CustomFeedEmptyState} from 'view/com/posts/CustomFeedEmptyState'
+import {useSetMinimalShellMode, useSetDrawerSwipeDisabled} from '#/state/shell'
+import {listenSoftReset, emitSoftReset} from '#/state/events'
+import {useSession} from '#/state/session'
+import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
+import {useIsFocused} from '@react-navigation/native'
+import {useAnalytics} from '@segment/analytics-react-native'
+import {useQueryClient} from '@tanstack/react-query'
+import {RQKEY as FEED_RQKEY} from '#/state/queries/post-feed'
+import {useOnMainScroll} from 'lib/hooks/useOnMainScroll'
+import {usePalette} from 'lib/hooks/usePalette'
+import {useWebMediaQueries} from 'lib/hooks/useWebMediaQueries'
+import {colors, s} from 'lib/styles'
+import {Feed} from '#/view/com/posts/Feed'
+import {TextLink} from '#/view/com/util/Link'
+import {LoadLatestBtn} from '#/view/com/util/load-latest/LoadLatestBtn'
+import {msg} from '@lingui/macro'
+import {useLingui} from '@lingui/react'
+import {useSetDrawerOpen} from '#/state/shell/drawer-open'
+import {useColorSchemeStyle} from 'lib/hooks/useColorSchemeStyle'
+import {useShellLayout} from '#/state/shell/shell-layout'
+import {useMinimalShellMode} from 'lib/hooks/useMinimalShellMode'
+import {HITSLOP_10} from 'lib/constants'
+import {Text} from '#/view/com/util/text/Text'
+
+const DISCOVER_FEED = `feedgen|at://did:plc:z72i7hdynmk6r22z27h6tvur/app.bsky.feed.generator/whats-hot`
+const POLL_FREQ = 30e3 // 30sec
+
+function Header({hasNew}: {hasNew: boolean}) {
+  const pal = usePalette('default')
+  const {isSandbox} = useSession()
+  const {_} = useLingui()
+  const setDrawerOpen = useSetDrawerOpen()
+  const brandBlue = useColorSchemeStyle(s.brandBlue, s.blue3)
+  const {headerHeight} = useShellLayout()
+  const {headerMinimalShellTransform} = useMinimalShellMode()
+  const {isTablet, isDesktop} = useWebMediaQueries()
+
+  const onPressAvi = React.useCallback(() => {
+    setDrawerOpen(true)
+  }, [setDrawerOpen])
+
+  return isTablet || isDesktop ? (
+    <View
+      style={[
+        pal.view,
+        {
+          flexDirection: 'row',
+          alignItems: 'center',
+          justifyContent: 'space-between',
+          paddingHorizontal: 18,
+          paddingVertical: 12,
+        },
+      ]}>
+      <TextLink
+        type="title-lg"
+        href="/"
+        style={[pal.text, {fontWeight: 'bold'}]}
+        text={
+          <>
+            {isSandbox ? 'SANDBOX' : 'Bluesky'}{' '}
+            {hasNew && (
+              <View
+                style={{
+                  top: -8,
+                  backgroundColor: colors.blue3,
+                  width: 8,
+                  height: 8,
+                  borderRadius: 4,
+                }}
+              />
+            )}
+          </>
+        }
+        onPress={emitSoftReset}
+      />
+    </View>
+  ) : (
+    <Animated.View
+      style={[pal.view, pal.border, styles.tabBar, headerMinimalShellTransform]}
+      onLayout={e => {
+        headerHeight.value = e.nativeEvent.layout.height
+      }}>
+      <View style={[pal.view, styles.topBar]}>
+        <View style={[pal.view]}>
+          <TouchableOpacity
+            testID="viewHeaderDrawerBtn"
+            onPress={onPressAvi}
+            accessibilityRole="button"
+            accessibilityLabel={_(msg`Open navigation`)}
+            accessibilityHint="Access profile and other navigation links"
+            hitSlop={HITSLOP_10}>
+            <FontAwesomeIcon
+              icon="bars"
+              size={18}
+              color={pal.colors.textLight}
+            />
+          </TouchableOpacity>
+        </View>
+        <Text style={[brandBlue, s.bold, styles.title]}>
+          {isSandbox ? 'SANDBOX' : 'Bluesky'}
+        </Text>
+        <View style={[pal.view, {width: 18}]} />
+      </View>
+    </Animated.View>
+  )
+}
+
+const styles = StyleSheet.create({
+  tabBar: {
+    // position: 'absolute',
+    zIndex: 1,
+    left: 0,
+    right: 0,
+    top: 0,
+    flexDirection: 'column',
+    borderBottomWidth: 1,
+  },
+  topBar: {
+    flexDirection: 'row',
+    justifyContent: 'space-between',
+    alignItems: 'center',
+    paddingHorizontal: 18,
+    paddingTop: 8,
+    paddingBottom: 8,
+    width: '100%',
+  },
+  title: {
+    fontSize: 21,
+  },
+})
+
+export function HomePublic() {
+  const {_} = useLingui()
+  const setMinimalShellMode = useSetMinimalShellMode()
+  const setDrawerSwipeDisabled = useSetDrawerSwipeDisabled()
+  const queryClient = useQueryClient()
+  const [onMainScroll, isScrolledDown, resetMainScroll] = useOnMainScroll()
+  const {screen} = useAnalytics()
+  const scrollElRef = React.useRef<FlatList>(null)
+  const isScreenFocused = useIsFocused()
+  const [hasNew, setHasNew] = React.useState(false)
+
+  const scrollToTop = React.useCallback(() => {
+    scrollElRef.current?.scrollToOffset({offset: 0})
+    resetMainScroll()
+  }, [resetMainScroll])
+
+  const onSoftReset = React.useCallback(() => {
+    scrollToTop()
+    queryClient.invalidateQueries({queryKey: FEED_RQKEY(DISCOVER_FEED)})
+    setHasNew(false)
+  }, [scrollToTop, queryClient, setHasNew])
+
+  // fires when page within screen is activated/deactivated
+  React.useEffect(() => {
+    if (isScreenFocused) {
+      return
+    }
+    screen('Feed')
+    return listenSoftReset(onSoftReset)
+  }, [onSoftReset, screen, isScreenFocused])
+
+  const onPressLoadLatest = React.useCallback(() => {
+    scrollToTop()
+    queryClient.invalidateQueries({queryKey: FEED_RQKEY(DISCOVER_FEED)})
+    setHasNew(false)
+  }, [scrollToTop, queryClient, setHasNew])
+
+  const renderCustomFeedEmptyState = React.useCallback(() => {
+    return <CustomFeedEmptyState />
+  }, [])
+
+  useFocusEffect(
+    React.useCallback(() => {
+      setMinimalShellMode(false)
+      setDrawerSwipeDisabled(false)
+    }, [setDrawerSwipeDisabled, setMinimalShellMode]),
+  )
+
+  const ListHeaderComponent = React.useCallback(() => {
+    return <Header hasNew={hasNew} />
+  }, [hasNew])
+
+  return (
+    <View style={s.h100pct}>
+      <Feed
+        enabled
+        feed={DISCOVER_FEED}
+        pollInterval={POLL_FREQ}
+        scrollElRef={scrollElRef}
+        onScroll={onMainScroll}
+        onHasNew={setHasNew}
+        scrollEventThrottle={1}
+        renderEmptyState={renderCustomFeedEmptyState} // TODO
+        renderEndOfFeed={renderCustomFeedEmptyState} // TODO
+        ListHeaderComponent={ListHeaderComponent}
+      />
+
+      {(isScrolledDown || hasNew) && (
+        <LoadLatestBtn
+          onPress={onPressLoadLatest}
+          label={_(msg`Load new posts`)}
+          showIndicator={hasNew}
+        />
+      )}
+    </View>
+  )
+}