IM/backend/IM_API/Dtos/ConversationDto.cs

using IM_API.Models;

namespace IM_API.Dtos
{
    public class ConversationDto
    {
        public int Id { get; set; }

        /// <summary>
        /// 用户
        /// </summary>
        public int UserId { get; set; }

        /// <summary>
        /// 对方ID（群聊为群聊ID，单聊为单聊ID）	
        /// </summary>
        public int TargetId { get; set; }

        /// <summary>
        /// 最后一条未读消息ID	
        /// </summary>
        public int? LastReadMessageId { get; set; }

        /// <summary>
        /// 未读消息数	
        /// </summary>
        public int UnreadCount { get; set; }

        public int ChatType { get; set; }


        /// <summary>
        /// 最后一条最新消息
        /// </summary>
        public string LastMessage { get; set; } = null!;
        /// <summary>
        /// 最后一条消息时间
        /// </summary>
        public DateTime? DateTime { get; set; } = null;

        /// <summary>
        /// 对方昵称
        /// </summary>
        public string TargetName { get; set; }
        /// <summary>
        /// 对方头像
        /// </summary>
        public string? TargetAvatar { get; set; }
        public MessageBaseDto? LastReadMessage { get; set; }
    }
}