Update feed component to use flatlist for lazy-loading scrolling; update feed-view model to match loading needs

src/view/com/Feed.tsx

@@ -1,16 +1,32 @@
 import React from 'react'
-import {observer} from 'mobx-react-lite'
-import {Text, View} from 'react-native'
-import {FeedViewModel} from '../../state/models/feed-view'
+import {observer, Observer} from 'mobx-react-lite'
+import {Text, View, FlatList} from 'react-native'
+import {FeedViewModel, FeedViewItemModel} from '../../state/models/feed-view'
 import {FeedItem} from './FeedItem'
 
 export const Feed = observer(function Feed({feed}: {feed: FeedViewModel}) {
+  const renderItem = ({item}: {item: FeedViewItemModel}) => (
+    <Observer>{() => <FeedItem item={item} />}</Observer>
+  )
+  const onRefresh = () => {
+    feed.refresh().catch(err => console.error('Failed to refresh', err))
+  }
+  const onEndReached = () => {
+    feed.loadMore().catch(err => console.error('Failed to load more', err))
+  }
   return (
     <View>
-      {feed.isLoading && <Text>Loading...</Text>}
+      {feed.isLoading && !feed.isRefreshing && <Text>Loading...</Text>}
       {feed.hasError && <Text>{feed.error}</Text>}
-      {feed.hasContent &&
-        feed.feed.map(item => <FeedItem key={item.key} item={item} />)}
+      {feed.hasContent && (
+        <FlatList
+          data={feed.feed}
+          renderItem={renderItem}
+          refreshing={feed.isRefreshing}
+          onRefresh={onRefresh}
+          onEndReached={onEndReached}
+        />
+      )}
       {feed.isEmpty && <Text>This feed is empty!</Text>}
     </View>
   )

src/view/screens/Home.tsx

@@ -9,7 +9,7 @@ export function Home(/*{navigation}: RootTabsScreenProps<'Home'>*/) {
   const store = useStores()
   useEffect(() => {
     console.log('Fetching home feed')
-    store.homeFeed.fetch()
+    store.homeFeed.setup()
   }, [store.homeFeed])
   return (
     <Shell>