private void BuildFragments(List <Node> fragmentNodes)
{
var parsedReq = _requestContext.ParsedRequest;
// first build headers only, so we can handle fragments referencing other fragments
foreach (var fn in fragmentNodes)
{
var nameNd = fn.FindChild(TermNames.Name);
var name = nameNd.GetText();
var fragmDef = new FragmentDef()
{
Name = name, SourceLocation = fn.GetLocation()
};
parsedReq.Fragments.Add(fragmDef);
// OnType spec
var typeCondNode = fn.FindChild(TermNames.TypeCond);
var onTypeNameNode = typeCondNode.ChildNodes[1];
fragmDef.OnTypeRef = new OnTypeRef()
{
SourceLocation = onTypeNameNode.GetLocation(), Name = onTypeNameNode.GetText(), Parent = fragmDef
};
// selection items
var selSetNode = fn.FindChild(TermNames.SelSet);
var items = BuildSelectionItemsList(selSetNode, fragmDef);
fragmDef.SelectionSubset = new SelectionSubset(fragmDef, items, selSetNode.GetLocation());
//directives
var dirListNode = fn.FindChild(TermNames.DirListOpt);
fragmDef.Directives = BuildDirectives(dirListNode, DirectiveLocation.FragmentDefinition, fragmDef);
}
}
public static int ComputeDependencyTreeLevel(this FragmentDef fragment)
{
if (fragment.DependencyTreeLevel < 0)
{
fragment.DependencyTreeLevel = (fragment.UsesFragmentsAll.Count == 0) ?
0 :
fragment.UsesFragmentsAll.Max(f => f.ComputeDependencyTreeLevel()) + 1;
}
return(fragment.DependencyTreeLevel);
}
private void Fragments_AddDeepFragmentRefsRec(FragmentDef topFragment, IList <FragmentDef> refsToCheck)
{
foreach (var refFragmDef in refsToCheck)
{
if (refFragmDef == topFragment)
{
AddError($"Fragment {refFragmDef.Name} is self-referencing, possibly through circular references with other fragments.",
refFragmDef);
return;
}
if (!topFragment.UsesFragmentsAll.Contains(refFragmDef))
{
topFragment.UsesFragmentsAll.Add(refFragmDef);
Fragments_AddDeepFragmentRefsRec(topFragment, refFragmDef.UsesFragments);
}
}
}
private FragmentSpread BuildInlineFragment(Node selNode)
{
// Create fragment def and fragment spread
var fragmDefs = _requestContext.ParsedRequest.Fragments;
var fragmDef = new FragmentDef()
{
IsInline = true, Name = "_inline_" + fragmDefs.Count
};
fragmDefs.Add(fragmDef);
// note: On-type is optional, spec mentions this: https://spec.graphql.org/June2018/#sec-Inline-Fragments
var typeNameNode = selNode.FindChild(TermNames.TypeCondOpt)?.FindChild(TermNames.Name);
if (typeNameNode != null)
{
var onTypeName = typeNameNode.GetText();
fragmDef.OnTypeRef = new OnTypeRef()
{
Name = onTypeName, SourceLocation = typeNameNode.GetLocation(), Parent = fragmDef
};
} //if
// Selection set
var selSetNode = selNode.FindChild(TermNames.SelSet);
var items = BuildSelectionItemsList(selSetNode, fragmDef);
fragmDef.SelectionSubset = new SelectionSubset(fragmDef, items, selSetNode.GetLocation());
// fragment spread
var fragm = new FragmentSpread()
{
Fragment = fragmDef, Name = fragmDef.Name, IsInline = true, SourceLocation = selNode.GetLocation()
};
//Directives
var dirListNode = selNode.FindChild(TermNames.DirListOpt);
fragm.Directives = BuildDirectives(dirListNode, DirectiveLocation.InlineFragment, fragm);
return(fragm);
}
private void MapFragment(FragmentDef fragm)
{
MapSelectionSubSet(fragm.SelectionSubset, fragm.OnTypeRef.TypeDef);
}
