WIP Clean Architecture

Windows 8.1 App Uses keepasslib v2.44 (temporarily)

ModernKeePass.Application.12/Database/Commands/CloseDatabase/CloseDatabaseCommand.cs

@@ -0,0 +1,31 @@
+using MediatR;
+using System.Threading;
+using System.Threading.Tasks;
+using ModernKeePass.Application.Common.Interfaces;
+using ModernKeePass.Application.Database.Queries.IsDatabaseOpen;
+using ModernKeePass.Domain.Exceptions;
+
+namespace ModernKeePass.Application.Database.Commands.CloseDatabase
+{
+    public class CloseDatabaseCommand: IRequest
+    {
+        public class CloseDatabaseCommandHandler : IRequestHandler<CloseDatabaseCommand>
+        {
+            private readonly IDatabaseProxy _database;
+            private readonly IMediator _mediator;
+
+            public CloseDatabaseCommandHandler(IDatabaseProxy database, IMediator mediator)
+            {
+                _database = database;
+                _mediator = mediator;
+            }
+
+            public async Task Handle(CloseDatabaseCommand message, CancellationToken cancellationToken)
+            {
+                var isDatabaseOpen = await _mediator.Send(new IsDatabaseOpenQuery(), cancellationToken);
+                if (isDatabaseOpen) _database.CloseDatabase();
+                else throw new DatabaseClosedException();
+            }
+        }
+    }
+}