VoiceBroadcast: Add backward and forward buttons for playback

Riot/Assets/Images.xcassets/VoiceBroadcast/voice_broadcast_backward_30s.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "voice_broadcast_backward_30s.svg",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Riot/Assets/Images.xcassets/VoiceBroadcast/voice_broadcast_forward_30s.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "voice_broadcast_forward_30s.svg",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Riot/Assets/Images.xcassets/VoiceBroadcast/voice_broadcast_spinner.imageset/Contents.json

@@ -2,16 +2,7 @@
   "images" : [
     {
       "filename" : "voice_broadcast_spinner.svg",
-      "idiom" : "universal",
-      "scale" : "1x"
-    },
-    {
-      "idiom" : "universal",
-      "scale" : "2x"
-    },
-    {
-      "idiom" : "universal",
-      "scale" : "3x"
+      "idiom" : "universal"
     }
   ],
   "info" : {

Riot/Generated/Images.swift

@@ -339,6 +339,8 @@ internal class Asset: NSObject {
     internal static let tabHome = ImageAsset(name: "tab_home")
     internal static let tabPeople = ImageAsset(name: "tab_people")
     internal static let tabRooms = ImageAsset(name: "tab_rooms")
+    internal static let voiceBroadcastBackward30s = ImageAsset(name: "voice_broadcast_backward_30s")
+    internal static let voiceBroadcastForward30s = ImageAsset(name: "voice_broadcast_forward_30s")
     internal static let voiceBroadcastLive = ImageAsset(name: "voice_broadcast_live")
     internal static let voiceBroadcastPause = ImageAsset(name: "voice_broadcast_pause")
     internal static let voiceBroadcastPlay = ImageAsset(name: "voice_broadcast_play")

RiotSwiftUI/Modules/Room/VoiceBroadcastPlayback/MatrixSDK/VoiceBroadcastPlaybackViewModel.swift

@@ -56,6 +56,8 @@ class VoiceBroadcastPlaybackViewModel: VoiceBroadcastPlaybackViewModelType, Voic
         return (!isPlaybackInitialized || isPlayingLastChunk) && (state.broadcastState == .started || state.broadcastState == .resumed)
     }
 
+    private static let defaultBackwardForwardValue: Float = 30000.0 // 30sec in ms
+
     // MARK: Public
 
     // MARK: - Setup
@@ -71,7 +73,7 @@ class VoiceBroadcastPlaybackViewModel: VoiceBroadcastPlaybackViewModelType, Voic
         let viewState = VoiceBroadcastPlaybackViewState(details: details,
                                                         broadcastState: voiceBroadcastAggregator.voiceBroadcastState,
                                                         playbackState: .stopped,
-                                                        playingState: VoiceBroadcastPlayingState(duration: Float(voiceBroadcastAggregator.voiceBroadcast.duration), isLive: false),
+                                                        playingState: VoiceBroadcastPlayingState(duration: Float(voiceBroadcastAggregator.voiceBroadcast.duration), isLive: false, canMoveForward: false, canMoveBackward: false),
                                                         bindings: VoiceBroadcastPlaybackViewStateBindings(progress: 0))
         super.init(initialViewState: viewState)
 
@@ -101,6 +103,10 @@ class VoiceBroadcastPlaybackViewModel: VoiceBroadcastPlaybackViewModelType, Voic
             pause()
         case .sliderChange(let didChange):
             didSliderChanged(didChange)
+        case .backward:
+            backward()
+        case .forward:
+            forward()
         }
     }
 
@@ -164,6 +170,52 @@ class VoiceBroadcastPlaybackViewModel: VoiceBroadcastPlaybackViewModelType, Voic
         audioPlayer?.stop()
     }
 
+    /// Backward (30sec) a voice broadcast
+    private func backward() {
+        let newProgressValue = context.progress - VoiceBroadcastPlaybackViewModel.defaultBackwardForwardValue
+        seekTo(newProgressValue > 0 ? newProgressValue : 0)
+
+        state.bindings.progress = newProgressValue
+        updateBackwardForwardButtons()
+    }
+
+    /// Forward (30sec) a voice broadcast
+    private func forward() {
+        let newProgressValue = context.progress + VoiceBroadcastPlaybackViewModel.defaultBackwardForwardValue
+        seekTo(newProgressValue < state.playingState.duration ? newProgressValue : state.playingState.duration)
+
+        state.bindings.progress = newProgressValue
+        updateBackwardForwardButtons()
+    }
+
+    private func seekTo(_ seekTime: Float) {
+        // Flush the chunks queue and the current audio player playlist
+        voiceBroadcastChunkQueue = []
+        reloadVoiceBroadcastChunkQueue = isProcessingVoiceBroadcastChunk
+        audioPlayer?.removeAllPlayerItems()
+
+        let chunks = reorderVoiceBroadcastChunks(chunks: Array(voiceBroadcastAggregator.voiceBroadcast.chunks))
+
+        // Reinject the chunks we need and play them
+        let remainingTime = state.playingState.duration - seekTime
+        var chunksDuration: UInt = 0
+        for chunk in chunks.reversed() {
+            chunksDuration += chunk.duration
+            voiceBroadcastChunkQueue.append(chunk)
+            if Float(chunksDuration) >= remainingTime {
+                break
+            }
+        }
+
+        MXLog.debug("[VoiceBroadcastPlaybackViewModel] seekTo: restart to time: \(seekTime) milliseconds")
+        let time = seekTime - state.playingState.duration + Float(chunksDuration)
+        seekToChunkTime = TimeInterval(time / 1000)
+        // Check the condition to resume the playback when data will be ready (after the chunk process).
+        if state.playbackState != .stopped, isActuallyPaused == false {
+            state.playbackState = .buffering
+        }
+        processPendingVoiceBroadcastChunks()
+    }
 
     // MARK: - Voice broadcast chunks playback
 
@@ -295,32 +347,8 @@ class VoiceBroadcastPlaybackViewModel: VoiceBroadcastPlaybackViewModelType, Voic
             audioPlayer?.pause()
             displayLink.isPaused = true
         } else {
-            // Flush the chunks queue and the current audio player playlist
-            voiceBroadcastChunkQueue = []
-            reloadVoiceBroadcastChunkQueue = isProcessingVoiceBroadcastChunk
-            audioPlayer?.removeAllPlayerItems()
-
-            let chunks = reorderVoiceBroadcastChunks(chunks: Array(voiceBroadcastAggregator.voiceBroadcast.chunks))
-
-            // Reinject the chunks we need and play them
-            let remainingTime = state.playingState.duration - state.bindings.progress
-            var chunksDuration: UInt = 0
-            for chunk in chunks.reversed() {
-                chunksDuration += chunk.duration
-                voiceBroadcastChunkQueue.append(chunk)
-                if Float(chunksDuration) >= remainingTime {
-                    break
-                }
-            }
-
-            MXLog.debug("[VoiceBroadcastPlaybackViewModel] didSliderChanged: restart to time: \(state.bindings.progress) milliseconds")
-            let time = state.bindings.progress - state.playingState.duration + Float(chunksDuration)
-            seekToChunkTime = TimeInterval(time / 1000)
-            // Check the condition to resume the playback when data will be ready (after the chunk process).
-            if state.playbackState != .stopped, isActuallyPaused == false {
-                state.playbackState = .buffering
-            }
-            processPendingVoiceBroadcastChunks()
+            seekTo(state.bindings.progress)
+            updateBackwardForwardButtons()
         }
     }
 
@@ -343,6 +371,13 @@ class VoiceBroadcastPlaybackViewModel: VoiceBroadcastPlaybackViewModelType, Voic
         }.reduce(0) { $0 + $1.duration}) + (audioPlayer?.currentTime.rounded() ?? 0) * 1000
 
         state.bindings.progress = Float(progress)
+
+        updateBackwardForwardButtons()
+    }
+
+    private func updateBackwardForwardButtons() {
+        state.playingState.canMoveBackward = state.bindings.progress > 0
+        state.playingState.canMoveForward = state.bindings.progress < state.playingState.duration
     }
 
     private func handleVoiceBroadcastChunksProcessing() {

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

@@ -110,7 +110,19 @@ struct VoiceBroadcastPlaybackView: View {
             if viewModel.viewState.playbackState == .error {
                 VoiceBroadcastPlaybackErrorView()
             } else {
-                ZStack {
+                HStack (spacing: 17.0) {
+                    if viewModel.viewState.playingState.canMoveBackward {
+                        Button {
+                            viewModel.send(viewAction: .backward)
+                        } label: {
+                            Image(uiImage: Asset.Images.voiceBroadcastBackward30s.image)
+                                .renderingMode(.original)
+                        }
+                        .accessibilityIdentifier("backwardButton")
+                    } else {
+                        Spacer().frame(width: 25.0)
+                    }
+
                     if viewModel.viewState.playbackState == .playing || viewModel.viewState.playbackState == .buffering {
                         Button { viewModel.send(viewAction: .pause) } label: {
                             Image(uiImage: Asset.Images.voiceBroadcastPause.image)
@@ -125,6 +137,18 @@ struct VoiceBroadcastPlaybackView: View {
                         .disabled(viewModel.viewState.playbackState == .buffering)
                         .accessibilityIdentifier("playButton")
                     }
+
+                    if viewModel.viewState.playingState.canMoveForward {
+                        Button {
+                            viewModel.send(viewAction: .forward)
+                        } label: {
+                            Image(uiImage: Asset.Images.voiceBroadcastForward30s.image)
+                                .renderingMode(.original)
+                        }
+                        .accessibilityIdentifier("forwardButton")
+                    } else {
+                        Spacer().frame(width: 25.0)
+                    }
                 }
             }
 

RiotSwiftUI/Modules/Room/VoiceBroadcastPlayback/VoiceBroadcastPlaybackModels.swift

@@ -21,6 +21,8 @@ enum VoiceBroadcastPlaybackViewAction {
     case play
     case pause
     case sliderChange(didChange: Bool)
+    case backward
+    case forward
 }
 
 enum VoiceBroadcastPlaybackState {
@@ -40,6 +42,8 @@ struct VoiceBroadcastPlayingState {
     var duration: Float
     var durationLabel: String?
     var isLive: Bool
+    var canMoveForward: Bool
+    var canMoveBackward: Bool
 }
 
 struct VoiceBroadcastPlaybackViewState: BindableState {