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Hangover. WinForms. Restore deleted books

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This commit is contained in:
Robert McRackan 2022-12-15 14:11:27 -05:00
parent 7ad0ab566a
commit b2cf837de7
8 changed files with 235 additions and 11 deletions
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40
Source/ApplicationServices/LibraryCommands.cs
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@ -9,7 +9,6 @@ using Dinah.Core;
using DtoImporterService;
using LibationFileManager;
using Serilog;
using static System.Reflection.Metadata.BlobBuilder;
using static DtoImporterService.PerfLogger;
namespace ApplicationServices
@ -336,7 +335,7 @@ namespace ApplicationServices
}
#endregion
#region remove books
#region remove/restore books
public static Task<int> RemoveBooksAsync(List<string> idsToRemove) => Task.Run(() => removeBooks(idsToRemove));
public static int RemoveBook(string idToRemove) => removeBooks(new() { idToRemove });
private static int removeBooks(List<string> idsToRemove)
@ -368,11 +367,40 @@ namespace ApplicationServices
Log.Logger.Error(ex, "Error removing books");
throw;
}
}
#endregion
}
// call this whenever books are added or removed from library
private static void finalizeLibrarySizeChange() => LibrarySizeChanged?.Invoke(null, null);
public static int RestoreBooks(this List<LibraryBook> libraryBooks)
{
try
{
if (libraryBooks is null || !libraryBooks.Any())
return 0;
using var context = DbContexts.GetContext();
// Attach() NoTracking entities before SaveChanges()
foreach (var lb in libraryBooks)
{
lb.IsDeleted = false;
context.Attach(lb).State = Microsoft.EntityFrameworkCore.EntityState.Modified;
}
var qtyChanges = context.SaveChanges();
if (qtyChanges > 0)
finalizeLibrarySizeChange();
return qtyChanges;
}
catch (Exception ex)
{
Log.Logger.Error(ex, "Error restoring books");
throw;
}
}
#endregion
// call this whenever books are added or removed from library
private static void finalizeLibrarySizeChange() => LibrarySizeChanged?.Invoke(null, null);
/// <summary>Occurs when the size of the library changes. ie: books are added or removed</summary>
public static event EventHandler LibrarySizeChanged;