CreateContactCommand.cs

//------------------------------------------------------------------------------
// <auto-generated>
// CleanArchitecture.Blazor - MIT Licensed.
// Author: neozhu
// Created/Modified: 2025-03-19
// Command and handler for creating a new Contact.
// Uses caching invalidation and domain events for data consistency.
// Docs: https://docs.cleanarchitectureblazor.com/features/contact
// </auto-generated>
//------------------------------------------------------------------------------

// Usage:
// Use this command to create a new contact with required fields and automatic domain event handling.


using CleanArchitecture.Blazor.Application.Features.Contacts.Caching;

namespace CleanArchitecture.Blazor.Application.Features.Contacts.Commands.Create;

public class CreateContactCommand: ICacheInvalidatorRequest<Result<int>>
{
      [Description("Id")]
      public int Id { get; set; }
          [Description("Name")]
    public string Name {get;set;} 
    [Description("Description")]
    public string? Description {get;set;} 
    [Description("Email")]
    public string? Email {get;set;} 
    [Description("Phone number")]
    public string? PhoneNumber {get;set;} 
    [Description("Country")]
    public string? Country {get;set;} 

      public string CacheKey => ContactCacheKey.GetAllCacheKey;
      public IEnumerable<string>? Tags => ContactCacheKey.Tags;
      private class Mapping : Profile
    {
        public Mapping()
        {
            CreateMap<CreateContactCommand, Contact>(MemberList.None);
        }
    }
}
    
    public class CreateContactCommandHandler : IRequestHandler<CreateContactCommand, Result<int>>
    {
        private readonly IMapper _mapper;
        private readonly IApplicationDbContext _context;
        public CreateContactCommandHandler(
            IMapper mapper,
            IApplicationDbContext context)
        {
            _mapper = mapper;
            _context = context;
        }
        public async Task<Result<int>> Handle(CreateContactCommand request, CancellationToken cancellationToken)
        {
           var item = _mapper.Map<Contact>(request);
           // raise a create domain event
	       item.AddDomainEvent(new ContactCreatedEvent(item));
           _context.Contacts.Add(item);
           await _context.SaveChangesAsync(cancellationToken);
           return  await Result<int>.SuccessAsync(item.Id);
        }
    }