Performance optimization (#1676)

* upgrade sentry to support profiling monitoring

* remove console logs in production builds

* feeds tab bar and bottom bar animation centralized

* refactor FeedPage out of Home

* add script to start in production mode

* move FAB inner to reanimated

* move FABInner back to `Animated` RN animation

* add perf commands

* add testing with Maestro and perf with Flashlight

* fix merge conflicts

* fix resourceClass name in eas.json

* fix onEndReachedThreshold in Feed

* memoize styles

* go back to old styling for LoadLatestBtn

* remove reanimated code from useMinimalShellMode

* move shell animations to hook/reanimated for perf

* fix empty state issue

* make shell animation feel smoother

* make shell animation more smooth

* run animation with autorun

* specify keys for tab bar properly

* remove comments

* remove already imported dep

* fix lint

* add testing instructions

* mock sentry-expo for jest

* fix jest mocks

* Fix the load-latest button on desktop and tablet

* Fix: don't move the FAB in tablet mode

* Fix type error

* Fix tabs bar positioning on tablet

* Fix types

---------

Co-authored-by: Paul Frazee <pfrazee@gmail.com>

1 files changed, 210 insertions, 0 deletions

diff --git a/src/view/com/feeds/FeedPage.tsx b/src/view/com/feeds/FeedPage.tsx
new file mode 100644
index 000000000..725106d59
--- /dev/null
+++ b/src/view/com/feeds/FeedPage.tsx
@@ -0,0 +1,210 @@
+import {
+  FontAwesomeIcon,
+  FontAwesomeIconStyle,
+} from '@fortawesome/react-native-fontawesome'
+import {useIsFocused} from '@react-navigation/native'
+import {useAnalytics} from '@segment/analytics-react-native'
+import {useOnMainScroll} from 'lib/hooks/useOnMainScroll'
+import {usePalette} from 'lib/hooks/usePalette'
+import {useWebMediaQueries} from 'lib/hooks/useWebMediaQueries'
+import {ComposeIcon2} from 'lib/icons'
+import {colors, s} from 'lib/styles'
+import {observer} from 'mobx-react-lite'
+import React from 'react'
+import {FlatList, View} from 'react-native'
+import {useStores} from 'state/index'
+import {PostsFeedModel} from 'state/models/feeds/posts'
+import {useHeaderOffset, POLL_FREQ} from 'view/screens/Home'
+import {Feed} from '../posts/Feed'
+import {TextLink} from '../util/Link'
+import {FAB} from '../util/fab/FAB'
+import {LoadLatestBtn} from '../util/load-latest/LoadLatestBtn'
+import useAppState from 'react-native-appstate-hook'
+
+export const FeedPage = observer(function FeedPageImpl({
+  testID,
+  isPageFocused,
+  feed,
+  renderEmptyState,
+  renderEndOfFeed,
+}: {
+  testID?: string
+  feed: PostsFeedModel
+  isPageFocused: boolean
+  renderEmptyState: () => JSX.Element
+  renderEndOfFeed?: () => JSX.Element
+}) {
+  const store = useStores()
+  const pal = usePalette('default')
+  const {isDesktop} = useWebMediaQueries()
+  const [onMainScroll, isScrolledDown, resetMainScroll] = useOnMainScroll(store)
+  const {screen, track} = useAnalytics()
+  const headerOffset = useHeaderOffset()
+  const scrollElRef = React.useRef<FlatList>(null)
+  const {appState} = useAppState({
+    onForeground: () => doPoll(true),
+  })
+  const isScreenFocused = useIsFocused()
+  const hasNew = feed.hasNewLatest && !feed.isRefreshing
+
+  React.useEffect(() => {
+    // called on first load
+    if (!feed.hasLoaded && isPageFocused) {
+      feed.setup()
+    }
+  }, [isPageFocused, feed])
+
+  const doPoll = React.useCallback(
+    (knownActive = false) => {
+      if (
+        (!knownActive && appState !== 'active') ||
+        !isScreenFocused ||
+        !isPageFocused
+      ) {
+        return
+      }
+      if (feed.isLoading) {
+        return
+      }
+      store.log.debug('HomeScreen: Polling for new posts')
+      feed.checkForLatest()
+    },
+    [appState, isScreenFocused, isPageFocused, store, feed],
+  )
+
+  const scrollToTop = React.useCallback(() => {
+    scrollElRef.current?.scrollToOffset({offset: -headerOffset})
+    resetMainScroll()
+  }, [headerOffset, resetMainScroll])
+
+  const onSoftReset = React.useCallback(() => {
+    if (isPageFocused) {
+      scrollToTop()
+      feed.refresh()
+    }
+  }, [isPageFocused, scrollToTop, feed])
+
+  // fires when page within screen is activated/deactivated
+  // - check for latest
+  React.useEffect(() => {
+    if (!isPageFocused || !isScreenFocused) {
+      return
+    }
+
+    const softResetSub = store.onScreenSoftReset(onSoftReset)
+    const feedCleanup = feed.registerListeners()
+    const pollInterval = setInterval(doPoll, POLL_FREQ)
+
+    screen('Feed')
+    store.log.debug('HomeScreen: Updating feed')
+    feed.checkForLatest()
+
+    return () => {
+      clearInterval(pollInterval)
+      softResetSub.remove()
+      feedCleanup()
+    }
+  }, [store, doPoll, onSoftReset, screen, feed, isPageFocused, isScreenFocused])
+
+  const onPressCompose = React.useCallback(() => {
+    track('HomeScreen:PressCompose')
+    store.shell.openComposer({})
+  }, [store, track])
+
+  const onPressTryAgain = React.useCallback(() => {
+    feed.refresh()
+  }, [feed])
+
+  const onPressLoadLatest = React.useCallback(() => {
+    scrollToTop()
+    feed.refresh()
+  }, [feed, scrollToTop])
+
+  const ListHeaderComponent = React.useCallback(() => {
+    if (isDesktop) {
+      return (
+        <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={
+              <>
+                {store.session.isSandbox ? 'SANDBOX' : 'Bluesky'}{' '}
+                {hasNew && (
+                  <View
+                    style={{
+                      top: -8,
+                      backgroundColor: colors.blue3,
+                      width: 8,
+                      height: 8,
+                      borderRadius: 4,
+                    }}
+                  />
+                )}
+              </>
+            }
+            onPress={() => store.emitScreenSoftReset()}
+          />
+          <TextLink
+            type="title-lg"
+            href="/settings/home-feed"
+            style={{fontWeight: 'bold'}}
+            accessibilityLabel="Feed Preferences"
+            accessibilityHint=""
+            text={
+              <FontAwesomeIcon
+                icon="sliders"
+                style={pal.textLight as FontAwesomeIconStyle}
+              />
+            }
+          />
+        </View>
+      )
+    }
+    return <></>
+  }, [isDesktop, pal, store, hasNew])
+
+  return (
+    <View testID={testID} style={s.h100pct}>
+      <Feed
+        testID={testID ? `${testID}-feed` : undefined}
+        key="default"
+        feed={feed}
+        scrollElRef={scrollElRef}
+        onPressTryAgain={onPressTryAgain}
+        onScroll={onMainScroll}
+        scrollEventThrottle={100}
+        renderEmptyState={renderEmptyState}
+        renderEndOfFeed={renderEndOfFeed}
+        ListHeaderComponent={ListHeaderComponent}
+        headerOffset={headerOffset}
+      />
+      {(isScrolledDown || hasNew) && (
+        <LoadLatestBtn
+          onPress={onPressLoadLatest}
+          label="Load new posts"
+          showIndicator={hasNew}
+        />
+      )}
+      <FAB
+        testID="composeFAB"
+        onPress={onPressCompose}
+        icon={<ComposeIcon2 strokeWidth={1.5} size={29} style={s.white} />}
+        accessibilityRole="button"
+        accessibilityLabel="New post"
+        accessibilityHint=""
+      />
+    </View>
+  )
+})