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import React, {useCallback, useEffect, useRef, useState} from 'react'
import {View} from 'react-native'
import {AppBskyEmbedVideo} from '@atproto/api'
import {msg} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {isFirefox} from '#/lib/browser'
import {clamp} from '#/lib/numbers'
import {
HLSUnsupportedError,
VideoEmbedInnerWeb,
VideoNotFoundError,
} from '#/view/com/util/post-embeds/VideoEmbedInner/VideoEmbedInnerWeb'
import {atoms as a} from '#/alf'
import {useIsWithinMessage} from '#/components/dms/MessageContext'
import {useFullscreen} from '#/components/hooks/useFullscreen'
import {ErrorBoundary} from '../ErrorBoundary'
import {useActiveVideoWeb} from './ActiveVideoWebContext'
import * as VideoFallback from './VideoEmbedInner/VideoFallback'
export function VideoEmbed({embed}: {embed: AppBskyEmbedVideo.View}) {
const ref = useRef<HTMLDivElement>(null)
const {active, setActive, sendPosition, currentActiveView} =
useActiveVideoWeb()
const [onScreen, setOnScreen] = useState(false)
const [isFullscreen] = useFullscreen()
useEffect(() => {
if (!ref.current) return
if (isFullscreen && !isFirefox) 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, isFullscreen])
const [key, setKey] = useState(0)
const renderError = useCallback(
(error: unknown) => (
<VideoError error={error} retry={() => setKey(key + 1)} />
),
[key],
)
let aspectRatio = 16 / 9
if (embed.aspectRatio) {
const {width, height} = embed.aspectRatio
// min: 3/1, max: square
aspectRatio = clamp(width / height, 1 / 1, 3 / 1)
}
return (
<View
style={[
a.w_full,
{aspectRatio},
{backgroundColor: 'black'},
a.relative,
a.rounded_md,
a.mt_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}>
<VideoEmbedInnerWeb
embed={embed}
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)
const [isFullscreen] = useFullscreen()
const isWithinMessage = useIsWithinMessage()
// Send position when scrolling. This is done with an IntersectionObserver
// observing a div of 100vh height
useEffect(() => {
if (!ref.current) return
if (isFullscreen && !isFirefox) 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, isFullscreen])
// 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={{
// Don't escape bounds when in a message
...(isWithinMessage
? {top: 0, height: '100%'}
: {top: 'calc(50% - 50vh)', height: '100vh'}),
position: 'absolute',
left: '50%',
width: 1,
pointerEvents: 'none',
}}
/>
</View>
)
}
function VideoError({error, retry}: {error: unknown; retry: () => void}) {
const {_} = useLingui()
let showRetryButton = true
let text = null
if (error instanceof VideoNotFoundError) {
text = _(msg`Video not found.`)
} else if (error instanceof HLSUnsupportedError) {
showRetryButton = false
text = _(
msg`Your browser does not support the video format. Please try a different browser.`,
)
} else {
text = _(msg`An error occurred while loading the video. Please try again.`)
}
return (
<VideoFallback.Container>
<VideoFallback.Text>{text}</VideoFallback.Text>
{showRetryButton && <VideoFallback.RetryButton onPress={retry} />}
</VideoFallback.Container>
)
}
|
