private List <Duplicate> checkByMode(List <Duplicate> duplicates, FileCompareMode fileCompareMode)
{
List <Duplicate> filteredDuplicates = new List <Duplicate>();
switch (fileCompareMode)
{
case FileCompareMode.FileSize:
var filteredDuplicatesGroupedBySize = duplicates
.GroupBy(x => x.DuplicateObjects.First().FileSize)
.Where(grp => grp.Count() > 1);
foreach (var group in filteredDuplicatesGroupedBySize)
{
Duplicate duplicate = new Duplicate();
List <DuplicateObject> duplicateObjects = new List <DuplicateObject>();
foreach (var item in group)
{
duplicateObjects.Add(new DuplicateObject()
{
FileName = item.DuplicateObjects.First().FileName,
FilePath = item.DuplicateObjects.First().FilePath,
FileSize = item.DuplicateObjects.First().FileSize,
MD5Hash = item.DuplicateObjects.First().MD5Hash
});
}
duplicate.DuplicateObjects = duplicateObjects;
filteredDuplicates.Add(duplicate);
}
break;
case FileCompareMode.FileSizeFileName:
var filteredDuplicatesGroupedBySizeName = duplicates
.GroupBy(x => new { x.DuplicateObjects.First().FileName, x.DuplicateObjects.First().FileSize })
.Where(grp => grp.Count() > 1);
foreach (var group in filteredDuplicatesGroupedBySizeName)
{
Duplicate duplicate = new Duplicate();
List <DuplicateObject> duplicateObjects = new List <DuplicateObject>();
foreach (var item in group)
{
duplicateObjects.Add(new DuplicateObject()
{
FileName = item.DuplicateObjects.First().FileName,
FilePath = item.DuplicateObjects.First().FilePath,
FileSize = item.DuplicateObjects.First().FileSize,
MD5Hash = item.DuplicateObjects.First().MD5Hash
});
}
duplicate.DuplicateObjects = duplicateObjects;
filteredDuplicates.Add(duplicate);
}
break;
}
return(filteredDuplicates);
}
/// <summary>
/// 文件提取器构造函数
/// </summary>
/// <param name="directory">搜寻文件的目录</param>
/// <param name="compareMode">指定文件的比较方式，用于排序</param>
/// <param name="sortMode">排序方式，升序或降序</param>
public FileExtractor(string directory, FileCompareMode compareMode, FileSortMode sortMode)
{
this.directory = directory;
if (!this.directory.EndsWith("\\"))
{
this.directory += "\\";
}
this.compareMode = compareMode;
this.sortMode = sortMode;
}
public IEnumerable <IDuplicate> LookupCandidate(string path, FileCompareMode mode)
{
List <Duplicate> duplicates = new List <Duplicate>();
try
{
List <string> dirs = Directory.EnumerateFiles(path, "*.*", SearchOption.AllDirectories).ToList <string>();
foreach (string filePath in dirs)
{
FileInfo fileInfo = new FileInfo(filePath);
Duplicate duplicate = new Duplicate();
duplicate.DuplicateObjects = new List <DuplicateObject>()
{
new DuplicateObject {
FilePath = filePath,
FileSize = fileInfo.Length,
FileName = fileInfo.Name,
MD5Hash = string.Empty
}
};
duplicates.Add(duplicate);
}
duplicates = checkByMode(duplicates, mode.Equals(FileCompareMode.FileSize) ? FileCompareMode.FileSize : FileCompareMode.FileSizeFileName);
}
catch (UnauthorizedAccessException e)
{
Console.WriteLine(e.Message);
throw e;
}
catch (DirectoryNotFoundException e)
{
Console.WriteLine(e.Message);
throw e;
}
catch (FileNotFoundException e)
{
Console.WriteLine(e.Message);
throw e;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
throw e;
}
return(CheckCandidates(duplicates));
}
/// <summary>
/// 文件提取器构造函数
/// </summary>
/// <param name="directory">搜寻文件的目录</param>
/// <param name="compareMode">指定文件的比较方式，用于排序</param>
public FileExtractor(string directory, FileCompareMode compareMode)
: this(directory, compareMode, FileSortMode.Descending)
{
}
