SUBD/ForumDatabaseImplement/Models/Answer.cs

using ForumContracts.BindingModels;
using ForumContracts.ViewModels;
using ForumDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace ForumDatabaseImplement.Models
{
    public class Answer : IAnswerModel
    {
        [Required]
        public DateTime ResponseDate { get; set; } = DateTime.Now;

        public int QuestionId { get; set; }

        public int UserId { get; set; }

        public int Id { get; set; }

        [Required]
        public string AnswerDes { get; set; } = string.Empty;

        public virtual User User { get; set; }

        public virtual Question Question { get; set; }

        public static Answer? Create(AnswerBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            return new Answer()
            {
                Id = model.Id,
                ResponseDate = model.ResponseDate,
                UserId = model.UserId,
                QuestionId = model.QuestionId,
                AnswerDes = model.AnswerDes
            };
        }
        public static Answer Create(AnswerViewModel model)
        {
            return new Answer
            {
                Id = model.Id,
                UserId = model.UserId,
                QuestionId = model.QuestionId,
                ResponseDate = model.ResponseDate,
                AnswerDes = model.AnswerDes
            };
        }
        public void Update(AnswerBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            UserId = model.UserId;
            QuestionId = model.QuestionId;
            ResponseDate = model.ResponseDate;
            AnswerDes = model.AnswerDes;
        }
        public AnswerViewModel GetViewModel => new()
        {
            AuthorAnswer= User?.Nickname ?? string.Empty,
            QuestionCreateDate =Question?.CreateDate ?? DateTime.Now,
            QuestionText = Question?.QuestionDes ?? string.Empty,
            Id = Id,
            ResponseDate = ResponseDate,
            UserId = UserId,
            QuestionId = QuestionId,
            AnswerDes = AnswerDes
        };
    }
}