private async ValueTask deleteFromParentFolder(NodeID nid, IDatabaseSession db)
{
var parentPath = ParentPath(new Uri(nid.Iri));
// avoid recursive loops
if (parentPath.Equals(nid))
{
return;
}
var parent = await db.Read(parentPath);
await RemoveFromParentsChildrenCollection(parent, nid, db);
}
public override async IAsyncEnumerable <object> Query(IDatabaseSession db)
{
var traversed = 0;
var parResult = System.Threading.Tasks.Parallel.For(0, 10, async(i) =>
{
var item = db.Read(Utils.Id("ekati:/etc/assembly"));
if (item.IsCompletedSuccessfully)
{
var res = item.Result;
var it = res.Attributes.Items.FirstOrDefault(i => i.Key.TryGet <NodeID>(out var nid) && nid.Iri == "ekati:attr/children");
if (it != null)
{
if (it.Value.TryGet <Map>(out var kids) && kids != null)
{
foreach (var k in kids.Items)
{
if (k.Key.TryGet <NodeID>(out var doc))
{
var sub = await db.Read(doc);
traversed++;
}
}
}
}
traversed++;
}
else
{
await item;
traversed++;
}
});
yield return(new { traversed, parResult });
}
private async ValueTask AddToParentsChildrenCollection(NodeID parentPath, NodeID requested, FileTypes.Ft fileType, IDatabaseSession db)
{
var parentDir = await db.Read(parentPath);
var alreadyPresent = parentDir?.Attributes.Items
.FirstOrDefault(kv => kv.Key.Equals(Attr.Children))
?.Value.Map?.Items?.Any(x => x.Key.Equals(requested)) ?? false;
if (!alreadyPresent)
{
var dataToAdd = new Node
{
Id = parentPath,
Attributes = new Map
{
Items = new List <KeyValue>()
{
Utils.Prop(DateTime.UtcNow.Ticks,
Attr.Children,
new Map
{
Items = new List <KeyValue>()
{
Utils.Prop(DateTime.UtcNow.Ticks, requested,
FileTypes.FromFt(fileType))
}
})
}
}
};
if (parentDir == null)
{
dataToAdd.Attributes.Items.Add(
Utils.Prop(DateTime.UtcNow.Ticks,
Attr.Type, FileTypes.TypeFolder
)
);
}
// Merge these new fields into the existing node.
await db.Merge(dataToAdd);
}
}
public override async IAsyncEnumerable <object> Query(IDatabaseSession db)
{
var item = await db.Read(Utils.Id("ekati:/etc/assembly"));
yield return(item);
}