Refactor feeds to use react-query (#1862)

* Update to react-query v5

* Introduce post-feed react query

* Add feed refresh behaviors

* Only fetch feeds of visible pages

* Implement polling for latest on feeds

* Add moderation filtering to slices

* Handle block errors

* Update feed error messages

* Remove old models

* Replace simple-feed option with disable-tuner option

* Add missing useMemo

* Implement the mergefeed and fixes to polling

* Correctly handle failed load more state

* Improve error and empty state behaviors

* Clearer naming

src/view/screens/Home.tsx

@@ -1,10 +1,9 @@
 import React from 'react'
-import {useWindowDimensions} from 'react-native'
 import {useFocusEffect} from '@react-navigation/native'
 import {observer} from 'mobx-react-lite'
 import isEqual from 'lodash.isequal'
 import {NativeStackScreenProps, HomeTabNavigatorParams} from 'lib/routes/types'
-import {PostsFeedModel} from 'state/models/feeds/posts'
+import {FeedDescriptor, FeedParams} from '#/state/queries/post-feed'
 import {withAuthRequired} from 'view/com/auth/withAuthRequired'
 import {FollowingEmptyState} from 'view/com/posts/FollowingEmptyState'
 import {FollowingEndOfFeed} from 'view/com/posts/FollowingEndOfFeed'
@@ -12,12 +11,9 @@ import {CustomFeedEmptyState} from 'view/com/posts/CustomFeedEmptyState'
 import {FeedsTabBar} from '../com/pager/FeedsTabBar'
 import {Pager, PagerRef, RenderTabBarFnProps} from 'view/com/pager/Pager'
 import {useStores} from 'state/index'
-import {useWebMediaQueries} from 'lib/hooks/useWebMediaQueries'
 import {FeedPage} from 'view/com/feeds/FeedPage'
 import {useSetMinimalShellMode, useSetDrawerSwipeDisabled} from '#/state/shell'
 
-export const POLL_FREQ = 30e3 // 30sec
-
 type Props = NativeStackScreenProps<HomeTabNavigatorParams, 'Home'>
 export const HomeScreen = withAuthRequired(
   observer(function HomeScreenImpl({}: Props) {
@@ -26,7 +22,7 @@ export const HomeScreen = withAuthRequired(
     const setDrawerSwipeDisabled = useSetDrawerSwipeDisabled()
     const pagerRef = React.useRef<PagerRef>(null)
     const [selectedPage, setSelectedPage] = React.useState(0)
-    const [customFeeds, setCustomFeeds] = React.useState<PostsFeedModel[]>([])
+    const [customFeeds, setCustomFeeds] = React.useState<FeedDescriptor[]>([])
     const [requestedCustomFeeds, setRequestedCustomFeeds] = React.useState<
       string[]
     >([])
@@ -39,14 +35,12 @@ export const HomeScreen = withAuthRequired(
         return
       }
 
-      const feeds = []
+      const feeds: FeedDescriptor[] = []
       for (const uri of pinned) {
         if (uri.includes('app.bsky.feed.generator')) {
-          const model = new PostsFeedModel(store, 'custom', {feed: uri})
-          feeds.push(model)
+          feeds.push(`feedgen|${uri}`)
         } else if (uri.includes('app.bsky.graph.list')) {
-          const model = new PostsFeedModel(store, 'list', {list: uri})
-          feeds.push(model)
+          feeds.push(`list|${uri}`)
         }
       }
       pagerRef.current?.setPage(0)
@@ -62,6 +56,19 @@ export const HomeScreen = withAuthRequired(
       setRequestedCustomFeeds,
     ])
 
+    const homeFeedParams = React.useMemo<FeedParams>(() => {
+      if (!store.preferences.homeFeed.lab_mergeFeedEnabled) {
+        return {}
+      }
+      return {
+        mergeFeedEnabled: true,
+        mergeFeedSources: store.preferences.savedFeeds,
+      }
+    }, [
+      store.preferences.homeFeed.lab_mergeFeedEnabled,
+      store.preferences.savedFeeds,
+    ])
+
     useFocusEffect(
       React.useCallback(() => {
         setMinimalShellMode(false)
@@ -129,14 +136,15 @@ export const HomeScreen = withAuthRequired(
           key="1"
           testID="followingFeedPage"
           isPageFocused={selectedPage === 0}
-          feed={store.me.mainFeed}
+          feed="home"
+          feedParams={homeFeedParams}
           renderEmptyState={renderFollowingEmptyState}
           renderEndOfFeed={FollowingEndOfFeed}
         />
         {customFeeds.map((f, index) => {
           return (
             <FeedPage
-              key={f.reactKey}
+              key={f}
               testID="customFeedPage"
               isPageFocused={selectedPage === 1 + index}
               feed={f}
@@ -148,17 +156,3 @@ export const HomeScreen = withAuthRequired(
     )
   }),
 )
-
-export function useHeaderOffset() {
-  const {isDesktop, isTablet} = useWebMediaQueries()
-  const {fontScale} = useWindowDimensions()
-  if (isDesktop) {
-    return 0
-  }
-  if (isTablet) {
-    return 50
-  }
-  // default text takes 44px, plus 34px of pad
-  // scale the 44px by the font scale
-  return 34 + 44 * fontScale
-}