chatbot/Chatbot.Application/Queries/GetChat.cs

using AutoMapper;
using Chatbot.Api.Domain.Repositories;
using MediatR;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace Chatbot.Api.Application.Queries
{
    public class GetChat
    {
        public class Query : Query<Model>
        {
            public Guid SessionId { get; set; }
            public Query() { }
        }

        public class Model
        {
            public Guid ChatId { get; set; }
        }

        public class QueryHandler : IRequestHandler<Query, Model>
        {
            private readonly IChatRepository _chatRepository;
            private readonly IMapper _mapper;

            public QueryHandler(IChatRepository chatRepository, IMapper mapper)
            {
                _chatRepository = chatRepository;
                _mapper = mapper;
            }

            public async Task<Model> Handle(Query request, CancellationToken cancellationToken)
            {
                var chat = await _chatRepository.CreateChat(request.SessionId);
                var result = _mapper.Map<Model>(chat);

                return result;
            }
        }
    }
}