UpdateContactCommand.cs

//------------------------------------------------------------------------------
// <auto-generated>
// CleanArchitecture.Blazor - MIT Licensed.
// Author: neozhu
// Created/Modified: 2025-03-19
// UpdateContactCommand & handler: updates an existing Contact with cache invalidation and raises ContactUpdatedEvent.
// Docs: https://docs.cleanarchitectureblazor.com/features/contact
// </auto-generated>
//------------------------------------------------------------------------------
//
// Usage:
// Use UpdateContactCommand to update an existing contact. If found, changes are applied, cache is invalidated, and ContactUpdatedEvent is raised.

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

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

public class UpdateContactCommand: 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<UpdateContactCommand, Contact>(MemberList.None);
            CreateMap<ContactDto,UpdateContactCommand>(MemberList.None);
        }
    }

}

public class UpdateContactCommandHandler : IRequestHandler<UpdateContactCommand, Result<int>>
{
    private readonly IApplicationDbContext _context;
    private readonly IMapper _mapper;
    public UpdateContactCommandHandler(
        IMapper mapper,
        IApplicationDbContext context)
    {
        _context = context;
        _mapper = mapper;
    }
    public async Task<Result<int>> Handle(UpdateContactCommand request, CancellationToken cancellationToken)
    {

       var item = await _context.Contacts.FindAsync(request.Id, cancellationToken);
       if (item == null)
       {
           return await Result<int>.FailureAsync($"Contact with id: [{request.Id}] not found.");
       }
       item = _mapper.Map(request, item);
	    // raise a update domain event
	   item.AddDomainEvent(new ContactUpdatedEvent(item));
       await _context.SaveChangesAsync(cancellationToken);
       return await Result<int>.SuccessAsync(item.Id);
    }
}