[Video] Only allow one `VideoView` to be active at a time, regardless of source (#5131)

src/view/com/util/post-embeds/ActiveVideoNativeContext.tsx

@@ -4,8 +4,9 @@ import {useVideoPlayer, VideoPlayer} from 'expo-video'
 import {isNative} from '#/platform/detection'
 
 const Context = React.createContext<{
-  activeSource: string | null
-  setActiveSource: (src: string) => void
+  activeSource: string
+  activeViewId: string | undefined
+  setActiveSource: (src: string, viewId: string) => void
   player: VideoPlayer
 } | null>(null)
 
@@ -15,6 +16,7 @@ export function Provider({children}: {children: React.ReactNode}) {
   }
 
   const [activeSource, setActiveSource] = React.useState('')
+  const [activeViewId, setActiveViewId] = React.useState<string>()
 
   const player = useVideoPlayer(activeSource, p => {
     p.muted = true
@@ -22,8 +24,19 @@ export function Provider({children}: {children: React.ReactNode}) {
     p.play()
   })
 
+  const setActiveSourceOuter = (src: string, viewId: string) => {
+    setActiveSource(src)
+    setActiveViewId(viewId)
+  }
+
   return (
-    <Context.Provider value={{activeSource, setActiveSource, player}}>
+    <Context.Provider
+      value={{
+        activeSource,
+        setActiveSource: setActiveSourceOuter,
+        activeViewId,
+        player,
+      }}>
       {children}
     </Context.Provider>
   )

src/view/com/util/post-embeds/VideoEmbed.tsx

@@ -1,4 +1,4 @@
-import React, {useCallback, useState} from 'react'
+import React, {useCallback, useId, useState} from 'react'
 import {View} from 'react-native'
 import {Image} from 'expo-image'
 import {AppBskyEmbedVideo} from '@atproto/api'
@@ -17,11 +17,14 @@ import {useActiveVideoNative} from './ActiveVideoNativeContext'
 import * as VideoFallback from './VideoEmbedInner/VideoFallback'
 
 export function VideoEmbed({embed}: {embed: AppBskyEmbedVideo.View}) {
-  const t = useTheme()
-  const {activeSource, setActiveSource, player} = useActiveVideoNative()
-  const [isFullscreen, setIsFullscreen] = React.useState(false)
-  const isActive = embed.playlist === activeSource
   const {_} = useLingui()
+  const t = useTheme()
+  const {activeSource, activeViewId, setActiveSource, player} =
+    useActiveVideoNative()
+  const viewId = useId()
+
+  const [isFullscreen, setIsFullscreen] = React.useState(false)
+  const isActive = embed.playlist === activeSource && activeViewId === viewId
 
   const [key, setKey] = useState(0)
   const renderError = useCallback(
@@ -34,7 +37,7 @@ export function VideoEmbed({embed}: {embed: AppBskyEmbedVideo.View}) {
 
   const onChangeStatus = (isVisible: boolean) => {
     if (isVisible) {
-      setActiveSource(embed.playlist)
+      setActiveSource(embed.playlist, viewId)
       if (!player.playing) {
         player.play()
       }
@@ -88,7 +91,7 @@ export function VideoEmbed({embed}: {embed: AppBskyEmbedVideo.View}) {
               <Button
                 style={[a.absolute, a.inset_0]}
                 onPress={() => {
-                  setActiveSource(embed.playlist)
+                  setActiveSource(embed.playlist, viewId)
                 }}
                 label={_(msg`Play video`)}
                 color="secondary">