chatbot/Chatbot.Api.Application/Queries/GetSession.cs

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

namespace Chatbot.Api.Application.Queries
{
    public class GetSession
    {
        public class Query : Query<Model>
        {
            public string BotName { get; set; }
            public string ExternalId { get; set; }
            public string ClientApplication { get; set; }
            public string UserKey { get; set; }
            public Query() { }
        }

        public class Model
        {
            public Guid SessionId { get; set; }
            public DateTime StartDate { get; set; }
        }

        public class QueryHandler : IRequestHandler<Query, Model>
        {
            private readonly IBotRepository _botRepository;
            private readonly ISessionRepository _sessionRepository;
            private readonly IMapper _mapper;

            public QueryHandler(IBotRepository botRepository, ISessionRepository sessionRepository, IMapper mapper)
            {
                _botRepository = botRepository;
                _sessionRepository = sessionRepository;
                _mapper = mapper;
            }

            public async Task<Model> Handle(Query request, CancellationToken cancellationToken)
            {
                var botId = await _botRepository.GetBotId(request.BotName);
                var session = await _sessionRepository.CreateSession(botId, request.ClientApplication, request.ExternalId, request.UserKey);
                var result = _mapper.Map<Model>(session);

                return result;
            }
        }
    }
}