public async Task <int> CompareTo(File file, FileAttribs option)
{
switch (option)
{
case FileAttribs.Name:
return(this.Name.CompareTo(file.Name));
case FileAttribs.DateCreated:
return(this.DateCreated.CompareTo(file.DateCreated));
case FileAttribs.DateModified:
return(this.DateModifyed.CompareTo(file.DateModifyed));
case FileAttribs.Content:
if (this.Size < file.Size)
{
return(-1);
}
if (this.Size > file.Size)
{
return(1);
}
//int i = await CompareFileContent(this, file);
return(await CompareFileContent(this, file)); //i;
case FileAttribs.Size:
return(this.Size.CompareTo(file.Size));
}
return(0);
}
/// <summary>
/// Реализует алгоритм сортировки спика файлов по заданному аттрибуту
/// </summary>
/// <param name="files"></param>
/// <param name="firstindex"></param>
/// <param name="lastindex"></param>
/// <param name="option"></param>
/// <returns></returns>
public async Task SortByAttribute(int firstindex, int lastindex, FileAttribs option)
{
if (firstindex >= lastindex)
{
return;
}
int c = await SortPass(firstindex, lastindex, option);
await SortByAttribute(firstindex, c - 1, option);
await SortByAttribute(c + 1, lastindex, option);
}
/// <summary>
/// Одиночный проход сортировки
/// </summary>
/// <param name="files"></param>
/// <param name="firstindex"></param>
/// <param name="lastindex"></param>
/// <param name="compareattrib"></param>
/// <returns></returns>
private async Task <int> SortPass(int firstindex, int lastindex, FileAttribs compareattrib)
{
int i = firstindex;
for (int j = i; j <= lastindex; j++)
{
int compareResult = await _files[j].CompareTo(_files[lastindex], compareattrib);
if (compareResult <= 0)
{
File t = _files[i];
_files[i] = _files[j];
_files[j] = t;
++i;
}
}
return(i - 1);
}
public GroupingAttribute(string name, FileAttribs attribute, int weight)
{
Name = name;
Attribute = attribute;
//Weight = weight;
}
