IM_NEW/GroupService.Domain/GroupMemberDomainService.cs

using GroupService.Domain.Entities;
using GroupService.Domain.Enums;
using GroupService.Domain.IReposities;
using IM.Commons;

namespace GroupService.Domain
{
    public class GroupMemberDomainService
    {
        private readonly IGroupMemberReposity reposity;

        public GroupMemberDomainService(IGroupMemberReposity reposity)
        {
            this.reposity = reposity;
        }

        public async Task<Result<GroupMember>> CreateAsync(
            Guid userId, Guid groupId, string nickName, string? avatar, GroupMemberRole role = GroupMemberRole.Normal)
        {
            var exist = await reposity.CheckMemberExistAsync(groupId, userId);
            if (exist)
            {
                return Result<GroupMember>.Fail(ResultCode.ALREADY_IN_GROUP);
            }
            var groupMember = new GroupMember(userId, groupId, nickName, avatar, role);
            groupMember = reposity.Create(groupMember);
            return Result<GroupMember>.Success(groupMember);
        }
    }
}