Added lots of commands

Simplified KeePass client

ModernKeePass.Application/Group/Commands/CreateGroup/CreateGroupCommand.cs

@@ -0,0 +1,42 @@
+using System.Threading.Tasks;
+using AutoMapper;
+using MediatR;
+using ModernKeePass.Application.Common.Interfaces;
+using ModernKeePass.Application.Database.Queries.IsDatabaseOpen;
+using ModernKeePass.Application.Group.Models;
+using ModernKeePass.Domain.Exceptions;
+
+namespace ModernKeePass.Application.Group.Commands.CreateGroup
+{
+    public class CreateGroupCommand : IRequest<GroupVm>
+    {
+        public GroupVm ParentGroup { get; set; }
+        public string Name { get; set; }
+        public bool IsRecycleBin { get; set; }
+
+        public class CreateGroupCommandHandler : IAsyncRequestHandler<CreateGroupCommand, GroupVm>
+        {
+            private readonly IDatabaseProxy _database;
+            private readonly IMediator _mediator;
+            private readonly IMapper _mapper;
+
+            public CreateGroupCommandHandler(IDatabaseProxy database, IMediator mediator, IMapper mapper)
+            {
+                _database = database;
+                _mediator = mediator;
+                _mapper = mapper;
+            }
+
+            public async Task<GroupVm> Handle(CreateGroupCommand message)
+            {
+                var isDatabaseOpen = await _mediator.Send(new IsDatabaseOpenQuery());
+                if (!isDatabaseOpen) throw new DatabaseClosedException();
+
+                var group = _database.CreateGroup(message.ParentGroup.Id, message.Name, message.IsRecycleBin);
+                var groupVm = _mapper.Map<GroupVm>(group);
+                message.ParentGroup.SubGroups.Add(groupVm);
+                return groupVm;
+            }
+        }
+    }
+}