Inform the user about decryption errors during a voice broadcast

RiotSwiftUI/Modules/Room/VoiceBroadcastPlayback/View/VoiceBroadcastPlaybackDecryptionErrorView.swift

@@ -0,0 +1,47 @@
+// 
+// Copyright 2023 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import SwiftUI
+
+struct VoiceBroadcastPlaybackDecryptionErrorView: View {
+    // MARK: - Properties
+    
+    // MARK: Private
+    
+    @Environment(\.theme) private var theme: ThemeSwiftUI
+    
+    // MARK: Public
+    
+    var body: some View {
+        ZStack {
+            HStack(spacing: 0) {
+                Image(uiImage: Asset.Images.errorIcon.image)
+                    .frame(width: 40, height: 40)
+                Text(VectorL10n.voiceBroadcastPlaybackUnableToDecrypt)
+                    .multilineTextAlignment(.center)
+                    .font(theme.fonts.caption1)
+                    .foregroundColor(theme.colors.alert)
+            }
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+    }
+}
+
+struct VoiceBroadcastPlaybackDecryptionErrorView_Previews: PreviewProvider {
+    static var previews: some View {
+        VoiceBroadcastPlaybackDecryptionErrorView()
+    }
+}

RiotSwiftUI/Modules/Room/VoiceBroadcastPlayback/View/VoiceBroadcastPlaybackView.swift

@@ -91,7 +91,7 @@ struct VoiceBroadcastPlaybackView: View {
                         }
                     }
                 }.frame(maxWidth: .infinity, alignment: .leading)
-                
+                                
                 if viewModel.viewState.broadcastState != .stopped {
                     Label {
                         Text(VectorL10n.voiceBroadcastLive)
@@ -109,7 +109,12 @@ struct VoiceBroadcastPlaybackView: View {
             .frame(maxWidth: .infinity, alignment: .leading)
             .padding(EdgeInsets(top: 0.0, leading: 0.0, bottom: 4.0, trailing: 0.0))
             
-            if viewModel.viewState.playbackState == .error {
+            if viewModel.viewState.decryptionState.errorCount > 0 {
+                VoiceBroadcastPlaybackDecryptionErrorView()
+                    .fixedSize(horizontal: false, vertical: true)
+                    .accessibilityIdentifier("decryptionErrorView")
+            }
+            else if viewModel.viewState.playbackState == .error {
                 VoiceBroadcastPlaybackErrorView()
             } else {
                 HStack (spacing: 34.0) {
@@ -156,8 +161,8 @@ struct VoiceBroadcastPlaybackView: View {
             }
             
             VoiceBroadcastSlider(value: $viewModel.progress,
-                       minValue: 0.0,
-                       maxValue: viewModel.viewState.playingState.duration) { didChange in
+                                 minValue: 0.0,
+                                 maxValue: viewModel.viewState.playingState.duration) { didChange in
                 viewModel.send(viewAction: .sliderChange(didChange: didChange))
             }