Autoplay the next voice message if it is the next timeline item. (#6089)

ElementX/Sources/Other/Extensions/Array.swift

@@ -64,4 +64,18 @@ nonisolated extension Array where Element == RoomTimelineItemProtocol {
     func firstUsingStableID(_ id: TimelineItemIdentifier) -> Element? {
         first { $0.id.uniqueID == id.uniqueID }
     }
+    
+    /// The voice message that directly follows the item with the given ID, if there is one.
+    ///
+    /// Decorations such as date separators and the read marker are ignored, but any other
+    /// kind of item in between means that no voice message directly follows.
+    func voiceMessageDirectlyFollowing(_ id: TimelineItemIdentifier) -> VoiceMessageRoomTimelineItem? {
+        guard let index = firstIndex(where: { $0.id.uniqueID == id.uniqueID }) else { return nil }
+        
+        for item in self[index...].dropFirst() where !(item is DecorationTimelineItemProtocol) {
+            return item as? VoiceMessageRoomTimelineItem
+        }
+        
+        return nil
+    }
 }

ElementX/Sources/Other/Extensions/URL.swift

@@ -93,6 +93,16 @@ nonisolated extension URL {
         return url
     }
     
+    /// The directory holding the sounds that iOS uses for its own interface.
+    static let systemSoundsDirectory: URL = {
+        let systemRoot = if let simulatorRoot = ProcessInfo.processInfo.environment["SIMULATOR_ROOT"] {
+            URL(filePath: simulatorRoot)
+        } else {
+            URL(filePath: "/")
+        }
+        return systemRoot.appending(components: "System", "Library", "Audio", "UISounds", directoryHint: .isDirectory)
+    }()
+    
     var globalProxy: String? {
         guard let proxySettings = CFNetworkCopySystemProxySettings()?.takeRetainedValue() else {
             MXLog.error("Failed retrieving proxy settings")