private static IEnumerable <IGrouping <string, FileItem> > CreateGrouping_FileExtensions(FolderItem rootFolder)
{
return
//From root folder ...
(rootFolder
//Select all descendant files ...
.DescendantFiles()
//Then order the files by file path ...
.OrderBy(item => item.ItemPath)
//Then group files by extension
.GroupBy(item => item.ItemExtension.ToLower())
//Then order the groups by thier keys
.OrderBy(item => item.Key));
}
private static IEnumerable <IGrouping <string, FileItem> > CreateGrouping_DuplicateFileSizesPlusNames(FolderItem rootFolder)
{
return
//From root folder ...
(rootFolder
//Select all descendant files ..
.DescendantFiles()
//Then order the files by file path ...
.OrderBy(item => item.ItemPath)
//Then group the items by a string containing the (size + name) of files
.GroupBy(item => item.FileSize().ToString("X8") + "-" + item.ItemName.ToLower())
//Only select groups having more then one file
.Where(item => item.Count() > 1)
//Then order the groups by thier keys
.OrderBy(item => item.Key));
}
private static IEnumerable <IGrouping <string, FileItem> > CreateGrouping_AllEnglishKeywords(FolderItem rootFolder)
{
var englishWordsList = LoadEnglishWordsList();
return
//From root folder ...
(rootFolder
//Select all descendant files ...
.DescendantFiles()
//Only select files having all keywords as english keywords in their names
.Where(item => item.ItemNameHasAllKeywordsFrom(englishWordsList))
//Then order the files by file path ...
.OrderBy(item => item.ItemPath)
//And put all files in a single group
.GroupBy(item => "All files with all english keywords"));
}
private static IEnumerable <IGrouping <string, FileItem> > CreateGrouping_DuplicateFiles(FolderItem rootFolder)
{
return
//From root folder ...
(rootFolder
//Select all descendant files ...
.DescendantFiles()
//Then group them by size ...
.GroupBy(item => item.FileSize())
//Then select the groups having more than one file
.Where(item => item.Count() > 1)
//Then flatten the groups into a list of files
.SelectMany(item => item)
//Then order the files by path
.OrderBy(item => item.ItemPath)
//Then group the files by (size + data hash)
.GroupBy(item => item.FileSize().ToString() + "-" + item.Md5DataHash())
//Then select the groups having more than one file
.Where(item => item.Count() > 1)
//Then order groups by (size + data hash) key
.OrderBy(item => item.Key));
}
