103 lines
2.7 KiB
TypeScript
103 lines
2.7 KiB
TypeScript
import React, {useState, useEffect, useRef} from 'react'
|
|
import {observer} from 'mobx-react-lite'
|
|
import {ActivityIndicator, FlatList, Text, View} from 'react-native'
|
|
import {
|
|
PostThreadViewModel,
|
|
PostThreadViewPostModel,
|
|
} from '../../../state/models/post-thread-view'
|
|
import {useStores} from '../../../state'
|
|
import {PostThreadItem} from './PostThreadItem'
|
|
import {ShareModal} from '../modals/SharePost'
|
|
import {s} from '../../lib/styles'
|
|
|
|
const UPDATE_DELAY = 2e3 // wait 2s before refetching the thread for updates
|
|
|
|
export const PostThread = observer(function PostThread({uri}: {uri: string}) {
|
|
const store = useStores()
|
|
const [view, setView] = useState<PostThreadViewModel | undefined>()
|
|
const [lastUpdate, setLastUpdate] = useState<number>(Date.now())
|
|
const shareSheetRef = useRef<{open: (_uri: string) => void}>()
|
|
|
|
useEffect(() => {
|
|
if (view?.params.uri === uri) {
|
|
console.log('Post thread doing nothing')
|
|
return // no change needed? or trigger refresh?
|
|
}
|
|
console.log('Fetching post thread', uri)
|
|
const newView = new PostThreadViewModel(store, {uri})
|
|
setView(newView)
|
|
newView.setup().catch(err => console.error('Failed to fetch thread', err))
|
|
}, [uri, view?.params.uri, store])
|
|
|
|
// TODO
|
|
// useFocusEffect(() => {
|
|
// if (Date.now() - lastUpdate > UPDATE_DELAY) {
|
|
// view?.update()
|
|
// setLastUpdate(Date.now())
|
|
// }
|
|
// })
|
|
|
|
const onPressShare = (uri: string) => {
|
|
shareSheetRef.current?.open(uri)
|
|
}
|
|
const onRefresh = () => {
|
|
view?.refresh().catch(err => console.error('Failed to refresh', err))
|
|
}
|
|
|
|
// loading
|
|
// =
|
|
if (
|
|
!view ||
|
|
(view.isLoading && !view.isRefreshing) ||
|
|
view.params.uri !== uri
|
|
) {
|
|
return (
|
|
<View>
|
|
<ActivityIndicator />
|
|
</View>
|
|
)
|
|
}
|
|
|
|
// error
|
|
// =
|
|
if (view.hasError) {
|
|
return (
|
|
<View>
|
|
<Text>{view.error}</Text>
|
|
</View>
|
|
)
|
|
}
|
|
|
|
// loaded
|
|
// =
|
|
const posts = view.thread ? Array.from(flattenThread(view.thread)) : []
|
|
const renderItem = ({item}: {item: PostThreadViewPostModel}) => (
|
|
<PostThreadItem item={item} onPressShare={onPressShare} />
|
|
)
|
|
return (
|
|
<View>
|
|
<FlatList
|
|
data={posts}
|
|
keyExtractor={item => item._reactKey}
|
|
renderItem={renderItem}
|
|
refreshing={view.isRefreshing}
|
|
onRefresh={onRefresh}
|
|
/>
|
|
<ShareModal ref={shareSheetRef} />
|
|
</View>
|
|
)
|
|
})
|
|
|
|
function* flattenThread(
|
|
post: PostThreadViewPostModel,
|
|
): Generator<PostThreadViewPostModel, void> {
|
|
if (post.parent) {
|
|
yield* flattenThread(post.parent)
|
|
}
|
|
yield post
|
|
if (post.replies?.length) {
|
|
for (const reply of post.replies) {
|
|
yield* flattenThread(reply)
|
|
}
|
|
}
|
|
}
|