CSV Import command created

ModernKeePass.Application/Import/Commands/ImportFromCsv/ImportFromCsvCommand.cs

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+using System.Collections.Generic;
+using System.Threading.Tasks;
+using MediatR;
+using ModernKeePass.Application.Common.Interfaces;
+using ModernKeePass.Domain.Enums;
+using ModernKeePass.Domain.Exceptions;
+
+namespace ModernKeePass.Application.Import.Commands.ImportFromCsv
+{
+    public class ImportFromCsvCommand : IRequest
+    {
+        public string FilePath { get; set; }
+        public string DestinationGroupId { get; set; }
+        public bool HasHeaderRow { get; set; }
+        public char Delimiter { get; set; } = ';';
+        public Dictionary<int, string> FieldMappings { get; set; }
+
+        public class CreateDatabaseCommandHandler : IAsyncRequestHandler<ImportFromCsvCommand>
+        {
+            private readonly IDatabaseProxy _database;
+            private readonly IFileProxy _file;
+
+            public CreateDatabaseCommandHandler(IDatabaseProxy database, IFileProxy file)
+            {
+                _database = database;
+                _file = file;
+            }
+
+            public async Task Handle(ImportFromCsvCommand message)
+            {
+                if (!_database.IsOpen) throw new DatabaseClosedException();
+
+                var fileContents = await _file.ReadTextFile(message.FilePath);
+                
+                for (var index = message.HasHeaderRow ? 1 : 0; index < fileContents.Count; index++)
+                {
+                    var line = fileContents[index];
+                    var fields = line.Split(message.Delimiter);
+
+                    var entry = _database.CreateEntry(message.DestinationGroupId);
+                    for (var i = 0; i < fields.Length; i++)
+                    {
+                        var fieldMapping = message.FieldMappings[i];
+                        await _database.UpdateEntry(entry.Id, fieldMapping, fields[i], fieldMapping == EntryFieldName.Password);
+                    }
+                }
+            }
+        }
+    }
+}

ModernKeePass.Application/Import/Commands/ImportFromCsv/ImportFromCsvCommandValidator.cs

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+using FluentValidation;
+
+namespace ModernKeePass.Application.Import.Commands.ImportFromCsv
+{
+    public class ImportFromCsvCommandValidator : AbstractValidator<ImportFromCsvCommand>
+    {
+        public ImportFromCsvCommandValidator()
+        {
+            RuleFor(v => v.FilePath)
+                .NotNull()
+                .NotEmpty();
+            RuleFor(v => v.DestinationGroupId)
+                .NotNull()
+                .NotEmpty();
+        }
+    }
+}