Add buttons to next video and restart video (fix #106)

Previous video requires rebuilding queue a little, maybe in the future

Model/Player/PlayerModel.swift

@@ -281,8 +281,12 @@ final class PlayerModel: ObservableObject {
     }
 
     func upgradeToStream(_ stream: Stream, force: Bool = false) {
+        guard let video = currentVideo else {
+            return
+        }
+
         if !self.stream.isNil, force || self.stream != stream {
-            playStream(stream, of: currentVideo!, preservingTime: true, upgrading: true)
+            playStream(stream, of: video, preservingTime: true, upgrading: true)
         }
     }
 

Model/Watch.swift

@@ -1,10 +1,12 @@
 import CoreData
+import CoreMedia
 import Defaults
 import Foundation
 
 @objc(Watch)
 final class Watch: NSManagedObject, Identifiable {
     @Default(.watchedThreshold) private var watchedThreshold
+    @Default(.saveHistory) private var saveHistory
 }
 
 extension Watch {
@@ -45,4 +47,15 @@ extension Watch {
         formatter.unitsStyle = .full
         return formatter.localizedString(for: watchedAt, relativeTo: Date())
     }
+
+    var timeToRestart: CMTime? {
+        finished ? nil : saveHistory ? .secondsInDefaultTimescale(stoppedAt) : nil
+    }
+
+    var video: Video {
+        Video(
+            videoID: videoID, title: "", author: "",
+            length: 0, published: "", views: -1, channel: Channel(id: "", name: "")
+        )
+    }
 }

Shared/Player/Controls/PlayerControls.swift

@@ -272,6 +272,9 @@ struct PlayerControls: View {
     var mediumButtonsBar: some View {
         HStack {
             #if !os(tvOS)
+                restartVideoButton
+                    .padding(.trailing, 15)
+
                 button("Seek Backward", systemImage: "gobackward.10", size: 30, cornerRadius: 5) {
                     player.backend.seek(relative: .secondsInDefaultTimescale(-10))
                 }
@@ -314,12 +317,28 @@ struct PlayerControls: View {
                 .keyboardShortcut("l", modifiers: [])
                 .keyboardShortcut(KeyEquivalent.rightArrow, modifiers: [])
                 #endif
+
+                advanceToNextItemButton
+                    .padding(.leading, 15)
             #endif
         }
         .font(.system(size: 20))
         .padding(.horizontal, 4)
     }
 
+    private var restartVideoButton: some View {
+        button("Restart video", systemImage: "backward.end.fill", size: 30, cornerRadius: 5) {
+            player.backend.seek(to: 0.0)
+        }
+    }
+
+    private var advanceToNextItemButton: some View {
+        button("Next", systemImage: "forward.fill", size: 30, cornerRadius: 5) {
+            player.advanceToNextItem()
+        }
+        .disabled(player.queue.isEmpty)
+    }
+
     var bottomBar: some View {
         HStack {
             Text(model.playbackTime)

Shared/Views/VideoContextMenuView.swift

@@ -141,16 +141,8 @@ struct VideoContextMenuView: View {
         Button {
             player.controls.startPiP(startImmediately: false)
 
-            var time: CMTime?
-            if saveHistory,
-               let stoppedAt = watch?.stoppedAt,
-               !watch!.finished
-            {
-                time = .secondsInDefaultTimescale(stoppedAt)
-            }
-
             DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
-                player.play(video, at: time, showingPlayer: false)
+                player.play(video, at: watch?.timeToRestart, showingPlayer: false)
             }
         } label: {
             Label("Play in PiP", systemImage: "pip")