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import React, {useCallback, useEffect, useRef, useState} from 'react'
import {View} from 'react-native'
import {msg, Trans} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {atoms as a, useTheme} from '#/alf'
import {Button, ButtonText} from '#/components/Button'
import {Text} from '#/components/Typography'
import {ErrorBoundary} from '../ErrorBoundary'
import {useActiveVideoView} from './ActiveVideoContext'
import {VideoEmbedInner} from './VideoEmbedInner'
import {HLSUnsupportedError} from './VideoEmbedInner.web'
export function VideoEmbed({source}: {source: string}) {
const t = useTheme()
const ref = useRef<HTMLDivElement>(null)
const {active, setActive, sendPosition, currentActiveView} =
useActiveVideoView({source})
const [onScreen, setOnScreen] = useState(false)
useEffect(() => {
if (!ref.current) return
const observer = new IntersectionObserver(
entries => {
const entry = entries[0]
if (!entry) return
setOnScreen(entry.isIntersecting)
sendPosition(
entry.boundingClientRect.y + entry.boundingClientRect.height / 2,
)
},
{threshold: 0.5},
)
observer.observe(ref.current)
return () => observer.disconnect()
}, [sendPosition])
const [key, setKey] = useState(0)
const renderError = useCallback(
(error: unknown) => (
<VideoError error={error} retry={() => setKey(key + 1)} />
),
[key],
)
return (
<View
style={[
a.w_full,
{aspectRatio: 16 / 9},
t.atoms.bg_contrast_25,
a.rounded_sm,
a.my_xs,
]}>
<div
ref={ref}
style={{display: 'flex', flex: 1, cursor: 'default'}}
onClick={evt => evt.stopPropagation()}>
<ErrorBoundary renderError={renderError} key={key}>
<ViewportObserver
sendPosition={sendPosition}
isAnyViewActive={currentActiveView !== null}>
<VideoEmbedInner
source={source}
active={active}
setActive={setActive}
onScreen={onScreen}
/>
</ViewportObserver>
</ErrorBoundary>
</div>
</View>
)
}
/**
* Renders a 100vh tall div and watches it with an IntersectionObserver to
* send the position of the div when it's near the screen.
*/
function ViewportObserver({
children,
sendPosition,
isAnyViewActive,
}: {
children: React.ReactNode
sendPosition: (position: number) => void
isAnyViewActive?: boolean
}) {
const ref = useRef<HTMLDivElement>(null)
const [nearScreen, setNearScreen] = useState(false)
// Send position when scrolling. This is done with an IntersectionObserver
// observing a div of 100vh height
useEffect(() => {
if (!ref.current) return
const observer = new IntersectionObserver(
entries => {
const entry = entries[0]
if (!entry) return
const position =
entry.boundingClientRect.y + entry.boundingClientRect.height / 2
sendPosition(position)
setNearScreen(entry.isIntersecting)
},
{threshold: Array.from({length: 101}, (_, i) => i / 100)},
)
observer.observe(ref.current)
return () => observer.disconnect()
}, [sendPosition])
// In case scrolling hasn't started yet, send up the position
useEffect(() => {
if (ref.current && !isAnyViewActive) {
const rect = ref.current.getBoundingClientRect()
const position = rect.y + rect.height / 2
sendPosition(position)
}
}, [isAnyViewActive, sendPosition])
return (
<View style={[a.flex_1, a.flex_row]}>
{nearScreen && children}
<div
ref={ref}
style={{
position: 'absolute',
top: 'calc(50% - 50vh)',
left: '50%',
height: '100vh',
width: 1,
pointerEvents: 'none',
}}
/>
</View>
)
}
function VideoError({error, retry}: {error: unknown; retry: () => void}) {
const t = useTheme()
const {_} = useLingui()
const isHLS = error instanceof HLSUnsupportedError
return (
<View
style={[
a.flex_1,
t.atoms.bg_contrast_25,
a.justify_center,
a.align_center,
a.px_lg,
a.border,
t.atoms.border_contrast_low,
a.rounded_sm,
a.gap_lg,
]}>
<Text
style={[
a.text_center,
t.atoms.text_contrast_high,
a.text_md,
a.leading_snug,
{maxWidth: 300},
]}>
{isHLS ? (
<Trans>
Your browser does not support the video format. Please try a
different browser.
</Trans>
) : (
<Trans>
An error occurred while loading the video. Please try again later.
</Trans>
)}
</Text>
{!isHLS && (
<Button
onPress={retry}
size="small"
color="secondary_inverted"
variant="solid"
label={_(msg`Retry`)}>
<ButtonText>
<Trans>Retry</Trans>
</ButtonText>
</Button>
)}
</View>
)
}
|
