internal IEnumerable <IPicLibFolder> InternalCompareSnapshot(IEnumerable <IPicLibFolder> oldOnes, IEnumerable <IPicLibFolder> newOnes)
{
if (oldOnes == null)
{
foreach (var item in newOnes)
{
var deeper = InternalCompareSnapshot(null, item.Folders);
foreach (var itemdeep in deeper)
{
yield return(itemdeep);
}
}
}
var setDiff = newOnes.ToDictionary(x => x.UriString, x => x);
foreach (var item in oldOnes)
{
IPicLibFolder target = null;
if (setDiff.TryGetValue(item.UriString, out target))
{
if (target.FileCount == item.FileCount &&
target.Folders.Count == item.Folders.Count &&
target.LastFileEditTime == item.LastFileEditTime
)
{
setDiff.Remove(target.UriString);
}
}
}
//var setNameCommon = new SortedSet<IPicLibFolder>(newOnes, compUrlEqual);
//setNameCommon.IntersectWith(oldOnes);
var dictOldOnes = oldOnes.ToDictionary(x => x.UriString, x => x);
foreach (var item in setDiff)
{
yield return(item.Value);
IPicLibFolder oldOne = null;
dictOldOnes.TryGetValue(item.Value.UriString, out oldOne);
var deeperOldOnes = oldOne?.Folders;
var depperNewOnes = item.Value.Folders;
var deeper = InternalCompareSnapshot(deeperOldOnes, depperNewOnes);
foreach (var itemdeep in deeper)
{
yield return(itemdeep);
}
}
}
internal async Task InternalSaveSnapshotAsync(IPicLibFolder[] folders)
{
var sl = new System.Runtime.Serialization.DataContractSerializer(typeof(PicLibFolder[]));
var ms = new MemoryStream();
sl.WriteObject(ms, folders.OfType<PicLibFolder>().ToArray());
ms.Position = 0;
GetCacheFile(CreationCollisionOption.ReplaceExisting);
var f = await workingFile;
using (var ws = await f.OpenStreamForWriteAsync())
{
await ms.CopyToAsync(ws);
}
}
public bool Equals(IPicLibFolder other)
{
return(UriString == other.UriString && LastFileEditTime == other.LastFileEditTime && this.FileCount == other.FileCount);
}
