private async Task <TreeNodeInfo> getNodeByTreePath(TreePtr tree, TreePath path, DateTime asOfUtc, ICacheParams caching)
{
var tblCache = s_CacheTableName[tree];
var keyCache = nameof(getNodeByTreePath) + path + asOfUtc.Ticks;
var result = await m_Data.Cache.FetchThroughAsync(
keyCache, tblCache, caching,
async key => {
TreeNodeInfo nodeParent = null;
TreeNodeInfo node = null;
for (var i = -1; i < path.Count; i++) //going from LEFT to RIGHT
{
var segment = i < 0 ? Constraints.VERY_ROOT_PATH_SEGMENT : path[i];
node = await getNodeByPathSegment(tree, nodeParent == null ? GDID.ZERO : nodeParent.Gdid, segment, asOfUtc, caching).ConfigureAwait(false);
if (node == null)
{
return(null); // deleted
}
//Config chain inheritance pattern
if (nodeParent == null)
{
node.EffectiveConfig = new ConfigVector(node.LevelConfig.Content);//Copy
node.FullPath = Constraints.VERY_ROOT_PATH_SEGMENT;
}
else
{
var confHere = node.LevelConfig.Node.NonEmpty(nameof(node.LevelConfig));
var confParent = nodeParent.EffectiveConfig.Node.NonEmpty(nameof(nodeParent.EffectiveConfig));
var confResult = new MemoryConfiguration()
{
Application = this.App
};
confResult.CreateFromNode(confParent); //inherit
confResult.Root.OverrideBy(confHere); //override
node.EffectiveConfig = new ConfigVector(confResult.Root);
node.FullPath = TreePath.Join(nodeParent.FullPath, node.PathSegment);
}
nodeParent = node;
App.Authorize(new TreePermission(TreeAccessLevel.Read, node.FullPathId));
}
return(node);
}).ConfigureAwait(false);
return(result);
}
private async Task <TreeNodeInfo> getNodeByGdid(HashSet <GDID> graph, TreePtr tree, GDID gNode, DateTime asOfUtc, ICacheParams caching)
{
var tblCache = s_CacheTableName[tree];
var keyCache = nameof(getNodeByGdid) + gNode.ToHexString() + asOfUtc.Ticks;
var result = await m_Data.Cache.FetchThroughAsync(
keyCache, tblCache, caching,
async key =>
{
if (!graph.Add(gNode))
{
//circular reference
var err = new ConfigException("Circular reference in config tree = `{0}`, gnode = `{1}`, asof = `{2}`".Args(tree, gNode, asOfUtc));
WriteLogFromHere(Log.MessageType.CatastrophicError,
err.Message,
err,
pars: new { tree = tree.ToString(), gnode = gNode, asof = asOfUtc }.ToJson());
throw err;
}
//1 - fetch THIS level - rightmost part of the tree
var qry = new Query <TreeNodeInfo>("Tree.GetNodeInfoByGdid")
{
new Query.Param("tree", tree),
new Query.Param("gdid", gNode),
new Query.Param("asof", asOfUtc)
};
var node = await m_Data.TreeLoadDocAsync(tree, qry);
if (node == null)
{
return(null);
}
//2 - if IAM ROOT, there is no parent for root
node.EffectiveConfig = new ConfigVector(node.LevelConfig.Content);//Copy
node.FullPath = Constraints.VERY_ROOT_PATH_SEGMENT;
if (node.Gdid == Constraints.G_VERY_ROOT_NODE)
{
return(node);
}
//3 - Fetch parent of THIS
TreeNodeInfo nodeParent = await getNodeByGdid(graph, tree, node.G_Parent, asOfUtc, caching).ConfigureAwait(false);
if (nodeParent == null)
{
return(null);
}
//4 - calculate effective config
var cfgNode = node.LevelConfig.Node.NonEmpty(nameof(node.LevelConfig));
var cfgParent = nodeParent.EffectiveConfig.Node.NonEmpty(nameof(nodeParent.EffectiveConfig));
var confResult = new MemoryConfiguration()
{
Application = this.App
};
confResult.CreateFromNode(cfgParent); //inherit
confResult.Root.OverrideBy(cfgNode); //override
node.EffectiveConfig.Node = confResult.Root;
node.FullPath = TreePath.Join(nodeParent.FullPath, node.PathSegment);
//the security check is done post factum AFTER tree node full path is known
return(node);
}
).ConfigureAwait(false);
if (result == null)
{
return(null);
}
App.Authorize(new TreePermission(TreeAccessLevel.Read, result.FullPathId));
return(result);
}
