Add Locate Audiobooks function (#485)

Source/LibationWinForms/Dialogs/LocateAudiobooksDialog.cs

@@ -0,0 +1,98 @@
+using ApplicationServices;
+using DataLayer;
+using LibationFileManager;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace LibationWinForms.Dialogs
+{
+	public partial class LocateAudiobooksDialog : Form
+	{
+		private event EventHandler<FilePathCache.CacheEntry> FileFound;
+		private readonly CancellationTokenSource tokenSource = new();
+		private readonly List<string> foundAsins = new();
+		private readonly string labelFormatText;
+		public LocateAudiobooksDialog()
+		{
+			InitializeComponent();
+
+			labelFormatText = booksFoundLbl.Text;
+			setFoundBookCount(0);
+
+			this.SetLibationIcon();
+			this.RestoreSizeAndLocation(Configuration.Instance);
+
+			Shown += LocateAudiobooks_Shown;
+			FileFound += LocateAudiobooks_FileFound;
+			FormClosing += LocateAudiobooks_FormClosing;
+		}
+
+		private void setFoundBookCount(int count)
+			=> booksFoundLbl.Text = string.Format(labelFormatText, count);
+
+		private void LocateAudiobooks_FileFound(object sender, FilePathCache.CacheEntry e)
+		{
+			foundAudiobooksLV.Items
+				.Add(new ListViewItem(new string[] { $"[{e.Id}]", Path.GetFileName(e.Path) }))
+				.EnsureVisible();
+
+			foundAudiobooksLV.AutoResizeColumn(1, ColumnHeaderAutoResizeStyle.ColumnContent);
+
+			if (!foundAsins.Any(asin => asin == e.Id))
+			{
+				foundAsins.Add(e.Id);
+				setFoundBookCount(foundAsins.Count);
+			}
+		}
+
+		private void LocateAudiobooks_FormClosing(object sender, FormClosingEventArgs e)
+		{
+			tokenSource.Cancel();
+			this.SaveSizeAndLocation(Configuration.Instance);
+		}
+
+		private async void LocateAudiobooks_Shown(object sender, EventArgs e)
+		{
+			var fbd = new FolderBrowserDialog
+			{
+				Description = "Select the folder to search for audiobooks",
+				UseDescriptionForTitle = true,
+				InitialDirectory = Configuration.Instance.Books
+			};
+
+			if (fbd.ShowDialog() != DialogResult.OK || !Directory.Exists(fbd.SelectedPath))
+			{
+				Close();
+				return;
+			}
+
+			using var context = DbContexts.GetContext();
+
+			await foreach (var book in AudioFileLocator.FindAudiobooks(fbd.SelectedPath, tokenSource.Token))
+			{
+				try
+				{
+					FilePathCache.Insert(book);
+
+					var lb = context.GetLibraryBook_Flat_NoTracking(book.Id);
+					if (lb.Book.UserDefinedItem.BookStatus is not LiberatedStatus.Liberated)
+						await Task.Run(() => lb.UpdateBookStatus(LiberatedStatus.Liberated));
+
+					this.Invoke(FileFound, this, book);
+				}
+				catch(Exception ex)
+				{
+					Serilog.Log.Error(ex, "Error adding found audiobook file to Libation. {@audioFile}", book);
+				}
+			}
+
+			MessageBox.Show(this, $"Libation has found {foundAsins.Count} unique audiobooks and added them to its database. ", $"Found {foundAsins.Count} Audiobooks");
+			Close();
+		}
+	}
+}