IM_NEW/GroupService.Domain/Entities/GroupJoinRequest.cs

using GroupService.Domain.Enums;
using GroupService.Domain.Events;
using GroupService.Domain.ValueObjects;
using IM.DomainCommons;

namespace GroupService.Domain.Entities
{
    public class GroupJoinRequest : AggregateRootEntity
    {
        /// <summary>
        /// 群聊编号
        /// 
        /// </summary>
        public Guid GroupId { get; private set; }
        public GroupProfile GroupProfile { get; private set; }

        /// <summary>
        /// 申请人	
        /// </summary>
        public Guid UserId { get; private set; }
        public UserProfile UserProfile { get; private set; }

        public Guid? OperatorId { get; private set; }
        public string? OperatorName { get; private set; }
        public string? OperatorAvatar { get; private set; }

        /// <summary>
        /// 申请状态（0:待管理员同意,1:已拒绝,2：已同意）
        /// </summary>
        public GroupJoinRequestState State { get; private set; } = GroupJoinRequestState.Pending;

        /// <summary>
        /// 入群附言
        /// </summary>
        public string Description { get; private set; } = "申请入群";

        private GroupJoinRequest() { }

        public GroupJoinRequest(Guid userId, UserProfile user, Guid groupId, GroupProfile group, string? desc)
        {
            UserId = userId;
            GroupId = groupId;
            GroupProfile = group;
            UserProfile = user;
            if (desc is not null && desc.Length > 20)
            {
                throw new DomainException("入群描述不可超过20字符");
            }
            Description = desc ?? Description;
        }

        public void Approve(Guid id, string nickName, string avatar)
        {
            if (State != GroupJoinRequestState.Pending) return;
            State = GroupJoinRequestState.Passed;
            OperatorAvatar = avatar;
            OperatorId = id;
            OperatorName = nickName;
            ModificationTime = DateTime.Now;
            AddDomainEvent(new GroupJoinRequestPassedDomainEvent(this));
        }

        public void Decline(Guid id, string nickName, string avatar)
        {
            if (State != GroupJoinRequestState.Pending) return;
            State = GroupJoinRequestState.Declined;
            OperatorAvatar = avatar;
            OperatorId = id;
            OperatorName = nickName;
            ModificationTime = DateTime.Now;
            AddDomainEvent(new GroupJoinRequestDeclinedDomainEvent(this));
        }
    }
}