public static Func <ListedItem, string> GetItemGroupKeySelector(GroupOption option)
{
return(option switch
{
GroupOption.Name => x => new string(x.ItemName.Take(1).ToArray()).ToUpperInvariant(),
GroupOption.Size => x => x.PrimaryItemAttribute != StorageItemTypes.Folder ? GetGroupSizeKey(x.FileSizeBytes) : x.FileSizeDisplay,
GroupOption.DateCreated => x => dateTimeFormatter.ToTimeSpanLabel(x.ItemDateCreatedReal).Text,
GroupOption.DateModified => x => dateTimeFormatter.ToTimeSpanLabel(x.ItemDateModifiedReal).Text,
GroupOption.FileType => x => x.PrimaryItemAttribute == StorageItemTypes.Folder && !x.IsShortcutItem ? x.ItemType : x.FileExtension?.ToLowerInvariant() ?? " ",
GroupOption.SyncStatus => x => x.SyncStatusString,
GroupOption.FileTag => x => x.FileTags?.FirstOrDefault(),
GroupOption.OriginalFolder => x => (x as RecycleBinItem)?.ItemOriginalFolder,
GroupOption.DateDeleted => x => dateTimeFormatter.ToTimeSpanLabel((x as RecycleBinItem)?.ItemDateDeletedReal ?? DateTimeOffset.Now).Text,
GroupOption.FolderPath => x => PathNormalization.GetParentDir(x.ItemPath.TrimPath()),
_ => null,
});
public ITimeSpanLabel ToTimeSpanLabel(DateTimeOffset offset) => formatter.ToTimeSpanLabel(offset);