PIbd-22-Ismailov_SUBD/BlogDataModels/BlogDatabaseImplement/Model/Topic.cs

using ForumContracts.BindingModels;
using ForumContracts.ViewModels;
using ForumDataModels;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static System.Net.Mime.MediaTypeNames;

namespace BlogDatabase.Models
{
    public class Topic : ITopicModel
    {
        [Required]
        public string Name { get; set; } = string.Empty;

        public int Id { get; private set; }

        [Required]
        public int UserId { get; set; }

        [Required]
        public int CategoryId { get; set; }

        [ForeignKey("MessageId")]
        List<Message> Messages { get; set; } = new();

        public virtual Category? Category { get; set; }

        public static Topic? Create(TopicBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            return new Topic()
            {
                Id = model.Id,
                Name = model.Name,
                CategoryId = model.CategoryId,
            };
        }
        public void Update(TopicBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            model.Id = Id;
            model.Name = Name;
        }
        public TopicViewModel GetViewModel => new()
        {
            Id = Id,
            Name = Name,
            CategoryId = CategoryId,
        };
    }
}