xxxproject/Demo/Data/Repository/SQLGroupRepositoryLmpl.cs

using Demo.Data.Entity;
using Demo.Data.RemoteData.RemoteDataBase;
using Demo.Data.RemoteData.RemoteDataBase.DAO;
using System.Collections.Generic;
using System.Linq;

namespace Demo.Data.Repository
{
    class SQLGroupRepositoryLmpl : IGroupRepository
    {
        private readonly RemoteDatabaseContex _remoteDatabaseContext;

        public SQLGroupRepositoryLmpl(RemoteDatabaseContex remoteDatabaseContext)
        {
            _remoteDatabaseContext = remoteDatabaseContext;
        }

        public bool AddGroup(GroupLocalEntity newGroup)
        {
            GroupDao groupDao = new GroupDao { Name = newGroup.Name };
            var result = _remoteDatabaseContext.Groups.Add(groupDao);
            _remoteDatabaseContext.SaveChanges();
            if (result != null) return true;
            return false;
        }

        public List<GroupLocalEntity> GetAllGroup()
        {
            var groups = _remoteDatabaseContext.Groups.ToList();

            return groups.Select(g => new GroupLocalEntity
            {
                Id = g.Id, 
                Name = g.Name
            }).ToList();
        }


        public GroupLocalEntity GetGroupById(int groupID)
        {
            var group = _remoteDatabaseContext.Groups
                .FirstOrDefault(g => g.Id == groupID);

            if (group == null)
            {
                return null; 
            }

            return new GroupLocalEntity
            {
                Id = group.Id,
                Name = group.Name
            };
        }

        public bool RemoveGroupById(int groupID)
        {
            var group = _remoteDatabaseContext.Groups
                .FirstOrDefault(g => g.Id == groupID); 

            if (group == null)
            {
                return false;
            }

            _remoteDatabaseContext.Groups.Remove(group);
            _remoteDatabaseContext.SaveChanges(); 

            return true; 
        }

        public bool UpdateGroupById(int groupID, GroupLocalEntity updatedGroup)
        {
            var existingGroup = _remoteDatabaseContext.Groups
                .FirstOrDefault(g => g.Id == groupID);

            if (existingGroup == null)
            {
                return false;
            }

            existingGroup.Name = updatedGroup.Name;

            _remoteDatabaseContext.SaveChanges();

            return true; 
        }

    }
}