IM_NEW/ContactService.Domain/FriendDomainService.cs

using ContactService.Domain.Entities;
using ContactService.Domain.ValueObjects;
using IM.Commons;

namespace ContactService.Domain
{
    public class FriendDomainService
    {
        private readonly IFriendReposity reposity;

        public FriendDomainService(IFriendReposity reposity)
        {
            this.reposity = reposity;
        }

        public async Task<Result<Friend?>> CreateAsync(UserProfile owner, UserProfile target, string? remarkName)
        {
            var isExist = await reposity.CheckOwnerIdAndTargetIdAsync(owner.Id, target.Id);
            if (isExist)
            {
                return Result<Friend?>.Fail(ResultCode.ALREADY_FRIENDS);
            }
            var friend = new Friend(owner, target, remarkName);
            var res = await reposity.CreateAsync(friend);
            return Result<Friend?>.Success(res);
        }
    }
}