Allow loading multiple images at once

RedBookPlayer.GUI/ViewModels/MainViewModel.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Input;
 using RedBookPlayer.GUI.Views;
@@ -163,19 +164,35 @@ namespace RedBookPlayer.GUI.ViewModels
         }
 
         /// <summary>
-        /// Load the first valid drag-and-dropped disc image
+        /// Load the all valid drag-and-dropped disc images
         /// </summary>
+        /// <remarks>If more than the number of discs in the changer are added, it will begin to overwrite</remarks>
         public async void ExecuteLoadDragDrop(object sender, DragEventArgs e)
         {
             if(PlayerView?.ViewModel == null)
                 return;
 
             IEnumerable<string> fileNames = e.Data.GetFileNames();
-            foreach(string filename in fileNames)
+            if(fileNames == null || fileNames.Count() == 0)
             {
-                bool loaded = await PlayerView.ViewModel.LoadImage(filename);
-                if(loaded)
-                    break;
+                return;
+            }
+            else if(fileNames.Count() == 1)
+            {
+                await PlayerView.ViewModel.LoadImage(fileNames.FirstOrDefault());
+            }
+            else
+            {
+                int lastDisc = PlayerView.ViewModel.CurrentDisc;
+                foreach(string path in fileNames)
+                {
+                    await PlayerView.ViewModel.LoadImage(path);
+                    
+                    if(PlayerView.ViewModel.Initialized)
+                        PlayerView.ViewModel.ExecuteNextDisc();
+                }
+
+                PlayerView.ViewModel.SelectDisc(lastDisc);
             }
         }
 

RedBookPlayer.GUI/ViewModels/PlayerViewModel.cs

@@ -17,6 +17,7 @@ using RedBookPlayer.Models.Hardware;
 
 namespace RedBookPlayer.GUI.ViewModels
 {
+    // TODO: Add direct index selection by number
     public class PlayerViewModel : ReactiveObject
     {
         /// <summary>
@@ -583,11 +584,28 @@ namespace RedBookPlayer.GUI.ViewModels
         /// </summary>
         public async void ExecuteLoad()
         {
-            string path = await GetPath();
-            if(path == null)
+            string[] paths = await GetPaths();
+            if(paths == null || paths.Length == 0)
+            {
                 return;
-
+            }
+            else if(paths.Length == 1)
+            {
+                await LoadImage(paths[0]);
+            }
+            else
+            {
+                int lastDisc = CurrentDisc;
+                foreach(string path in paths)
+                {
                     await LoadImage(path);
+                    
+                    if(Initialized)
+                        ExecuteNextDisc();
+                }
+
+                SelectDisc(lastDisc);
+            }
         }
 
         /// <summary>
@@ -680,6 +698,16 @@ namespace RedBookPlayer.GUI.ViewModels
         /// <param name="outputDirectory">Output path to write data to</param>
         public void ExtractAllTracksToWav(string outputDirectory) => _player?.ExtractAllTracksToWav(outputDirectory);
 
+        /// <summary>
+        /// Select a particular disc by number
+        /// </summary>
+        public void SelectDisc(int discNumber) => _player?.SelectDisc(discNumber);
+
+        /// <summary>
+        /// Select a particular track by number
+        /// </summary>
+        public void SelectTrack(int trackNumber) => _player?.SelectTrack(trackNumber);
+
         /// <summary>
         /// Set data playback method [CompactDisc only]
         /// </summary>
@@ -780,12 +808,12 @@ namespace RedBookPlayer.GUI.ViewModels
         /// <summary>
         /// Generate a path selection dialog box
         /// </summary>
-        /// <returns>User-selected path, if possible</returns>
-        private async Task<string> GetPath()
+        /// <returns>User-selected paths, if possible</returns>
+        private async Task<string[]> GetPaths()
         {
             return await Dispatcher.UIThread.InvokeAsync(async () =>
             {
-                var dialog = new OpenFileDialog { AllowMultiple = false };
+                var dialog = new OpenFileDialog { AllowMultiple = true };
                 List<string> knownExtensions = new Aaru.DiscImages.AaruFormat().KnownExtensions.ToList();
                 dialog.Filters.Add(new FileDialogFilter()
                 {
@@ -793,7 +821,7 @@ namespace RedBookPlayer.GUI.ViewModels
                     Extensions = knownExtensions.ConvertAll(e => e.TrimStart('.'))
                 });
 
-                return (await dialog.ShowAsync(App.MainWindow))?.FirstOrDefault();
+                return (await dialog.ShowAsync(App.MainWindow));
             });
         }
 

RedBookPlayer.Models/Hardware/Player.cs

@@ -6,6 +6,7 @@ using RedBookPlayer.Models.Factories;
 
 namespace RedBookPlayer.Models.Hardware
 {
+    // TODO: Add direct index selection by number
     public class Player : ReactiveObject
     {
         /// <summary>
@@ -404,6 +405,32 @@ namespace RedBookPlayer.Models.Hardware
             Initialized = false;
         }
 
+        /// <summary>
+        /// Select a particular disc by number
+        /// </summary>
+        public void SelectDisc(int discNumber)
+        {
+            PlayerState wasPlaying = PlayerState;
+            if (wasPlaying == PlayerState.Playing)
+                Stop();
+
+            CurrentDisc = discNumber;
+            if (_opticalDiscs[CurrentDisc] != null && _opticalDiscs[CurrentDisc].Initialized)
+            {
+                Initialized = true;
+                OpticalDiscStateChanged(this, null);
+                SoundOutputStateChanged(this, null);
+
+                if(wasPlaying == PlayerState.Playing)
+                    Play();
+            }
+            else
+            {
+                PlayerState = PlayerState.NoDisc;
+                Initialized = false;
+            }
+        }
+
         /// <summary>
         /// Move to the next disc
         /// </summary>
@@ -456,6 +483,30 @@ namespace RedBookPlayer.Models.Hardware
             }
         }
 
+        /// <summary>
+        /// Select a particular track by number
+        /// </summary>
+        public void SelectTrack(int trackNumber)
+        {
+            if(_opticalDiscs[CurrentDisc] == null || !_opticalDiscs[CurrentDisc].Initialized)
+                return;
+
+            PlayerState wasPlaying = PlayerState;
+            if(wasPlaying == PlayerState.Playing)
+                Pause();
+
+            if(trackNumber < (HiddenTrack ? 0 : 1) || trackNumber > TotalTracks)
+                _opticalDiscs[CurrentDisc].LoadFirstTrack();
+            else
+                _opticalDiscs[CurrentDisc].LoadTrack(trackNumber);
+            
+            if(_opticalDiscs[CurrentDisc] is CompactDisc compactDisc)
+                _soundOutputs[CurrentDisc].SetDeEmphasis(compactDisc.TrackHasEmphasis);
+
+            if(wasPlaying == PlayerState.Playing)
+                Play();
+        }
+
         /// <summary>
         /// Move to the next playable track
         /// </summary>