webappserver1/Models/Users.cs

using MessagePack;

namespace WebAppServer1.Models
{
    // 用户表
    public class User
    {
        public int Id { get; set; }
        public string Username { get; set; } = string.Empty;
        public string Nickname { get; set; } = string.Empty; // 可修改，不唯一
        public string Email { get; set; } = string.Empty;
        public string PasswordHash { get; set; } = string.Empty;
        public string AvatarUrl { get; set; } = string.Empty;
        public string Signature { get; set; } = string.Empty;
        public DateTime LastActive { get; set; }
        public DateTime CreatedAt { get; set; }
        public bool IsOnline { get; set; }

        public ICollection<Friend> Friends { get; set; } = new List<Friend>();
        public ICollection<Message> Messages { get; set; } = new List<Message>();
    }

    // 好友关系表
    public class Friend
    {
        public int Id { get; set; }
        public int UserId { get; set; }
        public int FriendId { get; set; }
        public FriendStatus Status { get; set; }
        public DateTime CreatedAt { get; set; }

        public User User { get; set; }
        public User FriendUser { get; set; }
    }

    public enum FriendStatus
    {
        Pending,
        Accepted,
        Blocked
    }

    // 群聊表
    public class Group
    {
        public int Id { get; set; }
        public string Name { get; set; } = string.Empty;
        public int OwnerId { get; set; }
        public string AvatarUrl { get; set; } = string.Empty;
        public DateTime CreatedAt { get; set; }

        public User Owner { get; set; }
        public ICollection<GroupMember> Members { get; set; } = new List<GroupMember>();
    }

    // 群成员表
    public class GroupMember
    {
        public int Id { get; set; }
        public int GroupId { get; set; }
        public int UserId { get; set; }
        public GroupRole Role { get; set; }
        public DateTime JoinedAt { get; set; }

        public Group Group { get; set; }
        public User User { get; set; }
    }

    public enum GroupRole
    {
        Member,
        Admin,
        Owner
    }

    // 消息表
    public class Message
    {
        public int Id { get; set; }
        public int SenderId { get; set; }
        public int? ReceiverId { get; set; } // 私聊
        public int? GroupId { get; set; }    // 群聊
        public string Content { get; set; } = string.Empty;
        public MessageType MessageType { get; set; }
        public DateTime CreatedAt { get; set; }
        public bool IsRead { get; set; }
        public bool IsDeleted { get; set; }

        public User Sender { get; set; }
        public User Receiver { get; set; }
        public Group Group { get; set; }
    }

    public enum MessageType
    {
        Text,
        Image,
        File,
        Video,
        Voice
    }

    // 通知表
    public class Notification
    {
        public int Id { get; set; }
        public int UserId { get; set; }
        public NotificationType Type { get; set; }
        public string Content { get; set; } = string.Empty;
        public bool IsRead { get; set; }
        public DateTime CreatedAt { get; set; }

        public User User { get; set; }
    }

    public enum NotificationType
    {
        FriendRequest,
        Message,
        System
    }

    // 文件表
    public class FileEntity
    {
        public int Id { get; set; }
        public int UploaderId { get; set; }
        public int MessageId { get; set; }
        public string FileUrl { get; set; } = string.Empty;
        public FileType FileType { get; set; }
        public int Size { get; set; }
        public DateTime UploadedAt { get; set; }

        public User Uploader { get; set; }
        public Message Message { get; set; }
    }

    public enum FileType
    {
        Image,
        Video,
        Document,
        Audio
    }

    public class UserProfileHistory
    {
        public int Id { get; set; }
        public int UserId { get; set; }
        public string FieldName { get; set; } = string.Empty;
        public string OldValue { get; set; } = string.Empty;
        public string NewValue { get; set; } = string.Empty;
        public DateTime ChangedAt { get; set; }
        public string ChangedBy { get; set; } = string.Empty;

        public User User { get; set; }
    }

    public class LoginRecord
    {
        public int Id { get; set; }
        public int UserId { get; set; }
        public DateTime LoginTime { get; set; }
        public string IpAddress { get; set; } = string.Empty;
        public string DeviceInfo { get; set; } = string.Empty;
        public bool IsSuccess { get; set; }

        public User User { get; set; }
    }



}