func (ctx *ValidationContext) VariableUsages(node HasSelectionSet) []*VariableUsage {
if usages, ok := ctx.variableUsages[node]; ok && usages != nil {
return usages
}
usages := []*VariableUsage{}
typeInfo := NewTypeInfo(&TypeInfoConfig{
Schema: ctx.schema,
})
visitor.Visit(node, visitor.VisitWithTypeInfo(typeInfo, &visitor.VisitorOptions{
KindFuncMap: map[string]visitor.NamedVisitFuncs{
kinds.VariableDefinition: visitor.NamedVisitFuncs{
Kind: func(p visitor.VisitFuncParams) (string, interface{}) {
return visitor.ActionSkip, nil
},
},
kinds.Variable: visitor.NamedVisitFuncs{
Kind: func(p visitor.VisitFuncParams) (string, interface{}) {
if node, ok := p.Node.(*ast.Variable); ok && node != nil {
usages = append(usages, &VariableUsage{
Node: node,
Type: typeInfo.InputType(),
})
}
return visitor.ActionNoChange, nil
},
},
},
}), nil)
ctx.variableUsages[node] = usages
return usages
}
func Print(astNode ast.Node) (printed interface{}) {
defer func() interface{} {
if r := recover(); r != nil {
return fmt.Sprintf("%v", astNode)
}
return printed
}()
printed = visitor.Visit(astNode, &visitor.VisitorOptions{
LeaveKindMap: printDocASTReducer,
}, nil)
return printed
}
// VisitUsingRules This uses a specialized visitor which runs multiple visitors in parallel,
// while maintaining the visitor skip and break API.
//
// @internal
// Had to expose it to unit test experimental customizable validation feature,
// but not meant for public consumption
func VisitUsingRules(schema *Schema, typeInfo *TypeInfo, astDoc *ast.Document, rules []ValidationRuleFn) []gqlerrors.FormattedError {
context := NewValidationContext(schema, astDoc, typeInfo)
visitors := []*visitor.VisitorOptions{}
for _, rule := range rules {
instance := rule(context)
visitors = append(visitors, instance.VisitorOpts)
}
// Visit the whole document with each instance of all provided rules.
visitor.Visit(astDoc, visitor.VisitWithTypeInfo(typeInfo, visitor.VisitInParallel(visitors...)), nil)
return context.Errors()
}