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import React, {useState, useEffect, useMemo} from 'react'
import {useSharedValue} from 'react-native-reanimated'
import {View} from 'react-native'
import {observer} from 'mobx-react-lite'
import {Feed} from '../com/posts/Feed'
import {FAB} from '../com/util/FloatingActionButton'
import {Selector} from '../com/util/Selector'
import {useStores} from '../../state'
import {FeedModel} from '../../state/models/feed-view'
import {ComposePostModel} from '../../state/models/shell'
import {ScreenParams} from '../routes'
import {s} from '../lib/styles'
export const Home = observer(function Home({visible}: ScreenParams) {
const store = useStores()
const [hasSetup, setHasSetup] = useState<boolean>(false)
const [selectedViewIndex, setSelectedViewIndex] = useState<number>(0)
const defaultFeedView = useMemo<FeedModel>(
() =>
new FeedModel(store, 'home', {
algorithm: 'reverse-chronological',
}),
[store],
)
const firehoseFeedView = useMemo<FeedModel>(
() =>
new FeedModel(store, 'home', {
algorithm: 'firehose',
}),
[store],
)
const swipeGestureInterp = useSharedValue<number>(0)
useEffect(() => {
if (!visible) {
return
}
if (hasSetup) {
console.log('Updating home feed')
defaultFeedView.update()
firehoseFeedView.update()
} else {
store.nav.setTitle('Home')
console.log('Fetching home feed')
defaultFeedView.setup().then(() => setHasSetup(true))
firehoseFeedView.setup()
}
}, [visible, store])
const onComposePress = () => {
store.shell.openModal(new ComposePostModel({onPost: onCreatePost}))
}
const onCreatePost = () => {
defaultFeedView.loadLatest()
firehoseFeedView.loadLatest()
}
const onSelectView = (viewIndex: number) => {
setSelectedViewIndex(viewIndex)
}
return (
<View style={s.flex1}>
<Selector
items={['My Feed', 'Firehose']}
selectedIndex={selectedViewIndex}
onSelect={onSelectView}
swipeGestureInterp={swipeGestureInterp}
/>
<Feed
key="default"
feed={defaultFeedView}
style={{display: selectedViewIndex === 0 ? 'flex' : 'none'}}
/>
<Feed
key="firehose"
feed={firehoseFeedView}
style={{display: selectedViewIndex === 1 ? 'flex' : 'none'}}
/>
<FAB icon="pen-nib" onPress={onComposePress} />
</View>
)
})
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