using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration;

namespace ChatRoomServer.Db.Entities
{
	/// <summary>
	///系统公告
	///</summary>
	public class Announcement
	{
		/// <summary>
		/// 公告ID
		/// </summary>
		public int Id { get; set; }

		/// <summary>
		/// 标题
		/// </summary>
		public string Title { get; set; }

		/// <summary>
		/// 公告内容
		/// </summary>
		public string Content { get; set; }

		/// <summary>
		/// 发布时间
		/// </summary>
		public DateTime PubTime { get; set; }

		/// <summary>
		/// 是否是关键公告
		/// </summary>
		public bool Important { get; set; }

		/// <summary>
		/// 过期时间
		/// </summary>
		public DateTime ExpiresTime { get; set; }

	}

	/// <summary>
	/// 实体类 <see cref="Announcement" /> 的配置对象
	/// </summary>
	internal class AnnouncementConfiguration : EntityTypeConfiguration<Announcement>
	{
		public AnnouncementConfiguration()
		{
			ToTable("Chat_Announcement");
			HasKey(m => m.Id);
			Property(s => s.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
			Property(s => s.Title).HasMaxLength(100).IsRequired();
			Property(s => s.Content).HasMaxLength(1000).IsRequired();
		}
	}
}