//public virtual async Task<TEntity> GetEntityWithOffspringAsync(long id)
//{
// var parent = await repository.GetAsync(id);
// var list = await GetFlattenOffspringAsync(parent.Code);
// return parent;//ef自动建立父子关系，
//}
/// <summary>
/// 移动节点
/// </summary>
/// <param name="sourceId"></param>
/// <param name="targetId"></param>
/// <param name="moveType"></param>
/// <returns></returns>
public virtual async Task <TEntity> MoveAsync(long sourceId, long?targetId, GeneralTreeMoveType moveType)
{
if (targetId == 0)
{
targetId = null;
}
var source = await repository.GetAsync(sourceId);
var target = targetId.HasValue ? await repository.GetAsync(targetId.Value) : null;
return(await MoveAsync(source, target, moveType));
}
public virtual async Task <TEntity> MoveAsync(TEntity source, TEntity target, GeneralTreeMoveType moveType)
{
TEntity targetParent = null;
IList <TEntity> targetChildren = null;
int targetIndex = 0;
//if (target == null)
//{
// //if (moveType != GeneralTreeMoveType.Append)
// // throw new UserFriendlyException(L("不能移动顶级节点的前或后面"));
// var all = await AsyncQueryableExecuter.ToListAsync(repository.GetAll().OrderByDescending(c => c.Code));
// targetChildren = all.Where(c => c.ParentId == null).ToList();
// targetIndex = targetChildren.Count;
//}
//else
if (moveType != GeneralTreeMoveType.Append)
{
var temp1 = await GetBrotherWithOffspringAsync(target);
targetParent = temp1.Item1;
targetChildren = temp1.Item2;
targetIndex = targetChildren.IndexOf(target) + (moveType == GeneralTreeMoveType.Front ? 0 : 1);
}
else
{
targetParent = target;
if (target != null)
{
targetChildren = await GetFlattenOffspringAsync(target.Code);
targetChildren = targetChildren.Where(c => c.ParentId == target.Id).ToList();
}
else
{
targetChildren = await GetFlattenOffspringAsync();
targetChildren = targetChildren.Where(c => c.ParentId == null).ToList();
}
targetIndex = targetChildren.Count;
}
return(await MoveAsync(source, targetParent, targetChildren, targetIndex));
}
