private (IComplexGraphType edgeType, Field queryAstNode) StripRelayConnection(IComplexGraphType graphType, Field fieldAst)
{
var edgesType = (IComplexGraphType)graphType.GetField("edges").ResolvedType.GetNamedType();
var edgeType = (IComplexGraphType)edgesType.GetField("node").ResolvedType.GetNamedType();
var field = fieldAst.SelectionSet.Selections
.OfType <Field>()
.FirstOrDefault(x => x.Name == "edges")
?.SelectionSet.Selections.OfType <Field>()
.FirstOrDefault(x => x.Name == "node")
?? fieldAst.SelectionSet.Selections
.OfType <Field>()
.FirstOrDefault(x => x.Name == "items")
?? new Field();
fieldAst = new Field(fieldAst.AliasNode, fieldAst.NameNode)
{
Arguments = fieldAst.Arguments,
Directives = fieldAst.Directives,
SelectionSet = field.SelectionSet,
SourceLocation = fieldAst.SourceLocation
};
return(edgeType, fieldAst);
}
public DelegateToFieldRule(
IComplexGraphType graphType,
string fieldName,
string delegateFieldName,
Func <TModel, TDelegateID> idGetter)
{
ResolvedType = graphType.GetField(fieldName).ResolvedType as IComplexGraphType;
if (ResolvedType == null)
{
throw new Exception($"ResolvedType of an object authorized by {GetType().Name} must be an IComplexGraphType");
}
DelegateFieldName = delegateFieldName;
IDGetter = idGetter;
}
private void HandleSelections(SqlTable parent, IComplexGraphType graphType, IEnumerable <ISelection> selections,
int depth, IResolveFieldContext context)
{
foreach (var selection in selections)
{
switch (selection)
{
case Field fieldAst:
if (fieldAst.Name.StartsWith("__"))
{
continue;
}
var field = graphType.GetField(fieldAst.Name);
var node = Convert(parent, fieldAst, field, graphType, ++depth, context);
switch (node)
{
case SqlColumnBase sqlColumn:
var fieldName = fieldAst.Alias ?? fieldAst.Name;
var existing = parent.Columns.Any(x => x.FieldName == fieldName);
if (existing)
{
continue;
}
parent.Columns.Add(sqlColumn);
break;
case SqlTable sqlTable:
parent.Tables.Add(sqlTable);
break;
case SqlNoop _:
continue;
default:
throw new ArgumentOutOfRangeException(nameof(node), $"Unknown node type ${node.GetType()}");
}
break;
case InlineFragment inlineFragment:
{
var selectionNameOfType = inlineFragment.Type.Name;
var deferredType = context.Schema.FindType(selectionNameOfType);
if (deferredType is IComplexGraphType complexGraphType)
{
HandleSelections(parent, complexGraphType,
inlineFragment.SelectionSet.Selections, depth, context);
}
break;
}
case FragmentSpread fragmentSpread:
{
var fragmentName = fragmentSpread.Name;
var definition = context.Fragments.FindDefinition(fragmentName);
var selectionNameOfType = definition.Type.Name;
var deferredType = context.Schema.FindType(selectionNameOfType);
if (deferredType is IComplexGraphType complexGraphType)
{
HandleSelections(parent, complexGraphType,
definition.SelectionSet.Selections, depth, context);
}
break;
}
default:
throw new ArgumentOutOfRangeException(nameof(selection), $"Unknown selection kind: {selection.GetType()}");
}
}
}