private bool DeletePreviewFoldersBlock(string path, bool keepLastVersions, int minimumNodeId, int blockSize, out int lastDeletedId)
{
lastDeletedId = 0;
if (!LoadPreviewFoldersBlock(path, keepLastVersions, minimumNodeId, blockSize, out var buffer))
{
return(false);
}
var pathBag = new ConcurrentBag <string>();
var workerBlock = new ActionBlock <NodeInfo>(
async node =>
{
if (!keepLastVersions || IsFolderDeletable(node.Path))
{
await DeleteContentFromDb(node.Id);
OnFolderDeleted?.Invoke(node.Id, EventArgs.Empty);
if (!string.IsNullOrEmpty(node.Path))
{
pathBag.Add(node.Path);
}
}
},
new ExecutionDataflowBlockOptions {
MaxDegreeOfParallelism = MaxDegreeOfParallelism
});
foreach (var folder in buffer)
{
workerBlock.Post(folder);
}
lastDeletedId = buffer.Max(n => n.Id);
workerBlock.Complete();
workerBlock.Completion.Wait();
Trace.Write("Removing preview folder block from the index.");
IndexManager.IndexingEngine.WriteIndex(pathBag.SelectMany(p => new[]
{
new SnTerm(IndexFieldName.InTree, p),
new SnTerm(IndexFieldName.Path, p)
}),
null, null);
return(true);
}
private bool DeleteEmptyPreviewFoldersBlock(string path, int blockSize)
{
if (!LoadEmptyPreviewFoldersBlock(path, blockSize, out var buffer))
{
return(false);
}
var pathBag = new ConcurrentBag <string>();
var workerBlock = new ActionBlock <NodeInfo>(
async node =>
{
await DeleteContentFromDb(node.Id);
OnFolderDeleted?.Invoke(node.Id, EventArgs.Empty);
if (!string.IsNullOrEmpty(node.Path))
{
pathBag.Add(node.Path);
}
},
new ExecutionDataflowBlockOptions {
MaxDegreeOfParallelism = MaxDegreeOfParallelism
});
foreach (var folder in buffer)
{
workerBlock.Post(folder);
}
workerBlock.Complete();
workerBlock.Completion.Wait();
Trace.Write("Removing preview folder block from the index.");
IndexManager.IndexingEngine.WriteIndexAsync(pathBag.SelectMany(p => new[]
{
new SnTerm(IndexFieldName.InTree, p),
new SnTerm(IndexFieldName.Path, p)
}),
null, null, CancellationToken.None).GetAwaiter().GetResult();
return(true);
}