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import React from 'react'
import {observer} from 'mobx-react-lite'
import {Animated, StyleSheet, TouchableOpacity, View} from 'react-native'
import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
import {useNavigation} from '@react-navigation/native'
import {CenteredView} from './Views'
import {UserAvatar} from './UserAvatar'
import {Text} from './text/Text'
import {useStores} from 'state/index'
import {usePalette} from 'lib/hooks/usePalette'
import {useAnimatedValue} from 'lib/hooks/useAnimatedValue'
import {useAnalytics} from 'lib/analytics'
import {NavigationProp} from 'lib/routes/types'
import {isDesktopWeb} from 'platform/detection'
const BACK_HITSLOP = {left: 20, top: 20, right: 50, bottom: 20}
export const ViewHeader = observer(function ({
title,
canGoBack,
hideOnScroll,
showOnDesktop,
}: {
title: string
canGoBack?: boolean
hideOnScroll?: boolean
showOnDesktop?: boolean
}) {
const pal = usePalette('default')
const store = useStores()
const navigation = useNavigation<NavigationProp>()
const {track} = useAnalytics()
const onPressBack = React.useCallback(() => {
if (navigation.canGoBack()) {
navigation.goBack()
} else {
navigation.navigate('Home')
}
}, [navigation])
const onPressMenu = React.useCallback(() => {
track('ViewHeader:MenuButtonClicked')
store.shell.openDrawer()
}, [track, store])
if (isDesktopWeb) {
if (showOnDesktop) {
return <DesktopWebHeader title={title} />
}
return null
} else {
if (typeof canGoBack === 'undefined') {
canGoBack = navigation.canGoBack()
}
return (
<Container hideOnScroll={hideOnScroll || false}>
<TouchableOpacity
testID="viewHeaderDrawerBtn"
onPress={canGoBack ? onPressBack : onPressMenu}
hitSlop={BACK_HITSLOP}
style={canGoBack ? styles.backBtn : styles.backBtnWide}
accessibilityRole="button"
accessibilityLabel={canGoBack ? 'Go back' : 'Go to menu'}
accessibilityHint={
canGoBack
? 'Navigates to the previous screen'
: 'Navigates to the menu'
}>
{canGoBack ? (
<FontAwesomeIcon
size={18}
icon="angle-left"
style={[styles.backIcon, pal.text]}
/>
) : (
<UserAvatar size={30} avatar={store.me.avatar} />
)}
</TouchableOpacity>
<View style={styles.titleContainer} pointerEvents="none">
<Text type="title" style={[pal.text, styles.title]}>
{title}
</Text>
</View>
<View style={canGoBack ? styles.backBtn : styles.backBtnWide} />
</Container>
)
}
})
function DesktopWebHeader({title}: {title: string}) {
const pal = usePalette('default')
return (
<CenteredView style={[styles.header, styles.desktopHeader, pal.border]}>
<View style={styles.titleContainer} pointerEvents="none">
<Text type="title-lg" style={[pal.text, styles.title]}>
{title}
</Text>
</View>
</CenteredView>
)
}
const Container = observer(
({
children,
hideOnScroll,
}: {
children: React.ReactNode
hideOnScroll: boolean
}) => {
const store = useStores()
const pal = usePalette('default')
const interp = useAnimatedValue(0)
React.useEffect(() => {
if (store.shell.minimalShellMode) {
Animated.timing(interp, {
toValue: 1,
duration: 100,
useNativeDriver: true,
isInteraction: false,
}).start()
} else {
Animated.timing(interp, {
toValue: 0,
duration: 100,
useNativeDriver: true,
isInteraction: false,
}).start()
}
}, [interp, store.shell.minimalShellMode])
const transform = {
transform: [{translateY: Animated.multiply(interp, -100)}],
}
if (!hideOnScroll) {
return <View style={[styles.header, pal.view]}>{children}</View>
}
return (
<Animated.View
style={[styles.header, pal.view, styles.headerFloating, transform]}>
{children}
</Animated.View>
)
},
)
const styles = StyleSheet.create({
header: {
flexDirection: 'row',
alignItems: 'center',
paddingHorizontal: 12,
paddingVertical: 6,
},
headerFloating: {
position: 'absolute',
top: 0,
width: '100%',
},
desktopHeader: {
borderBottomWidth: 1,
paddingVertical: 12,
},
titleContainer: {
marginLeft: 'auto',
marginRight: 'auto',
paddingRight: 10,
},
title: {
fontWeight: 'bold',
},
backBtn: {
width: 30,
height: 30,
},
backBtnWide: {
width: 30,
height: 30,
paddingHorizontal: 6,
},
backIcon: {
marginTop: 6,
},
})
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