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use crate::executable::{Error, Rule, Rules};
use bluejay_core::definition::{
FieldDefinition, FieldsDefinition, InterfaceTypeDefinition, ObjectTypeDefinition,
SchemaDefinition, TypeDefinitionReference, TypeDefinitionReferenceFromAbstract,
};
use bluejay_core::executable::{
ExecutableDocument, Field, FragmentDefinition, InlineFragment,
OperationDefinitionFromExecutableDocument, Selection,
};
use bluejay_core::OperationType;
pub struct Validator<'a, E: ExecutableDocument, S: SchemaDefinition, R: Rule<'a, E, S>> {
schema_definition: &'a S,
executable_document: &'a E,
rule: R,
}
pub type RulesValidator<'a, E, S> = Validator<'a, E, S, Rules<'a, E, S>>;
impl<'a, E: ExecutableDocument, S: SchemaDefinition, R: Rule<'a, E, S>> Validator<'a, E, S, R> {
fn new(executable_document: &'a E, schema_definition: &'a S) -> Self {
Self {
schema_definition,
executable_document,
rule: Rule::new(executable_document, schema_definition),
}
}
fn visit(&mut self) {
self.executable_document
.operation_definitions()
.iter()
.for_each(|operation_definition| {
self.visit_operation_definition(operation_definition.as_ref());
});
self.executable_document
.fragment_definitions()
.iter()
.for_each(|fragment_definition| {
self.visit_fragment_definition(fragment_definition);
});
}
fn visit_operation_definition(
&mut self,
operation_definition: &'a OperationDefinitionFromExecutableDocument<E>,
) {
self.rule.visit_operation(operation_definition);
let root_operation_type_definition_name = match operation_definition.operation_type() {
OperationType::Query => Some(self.schema_definition.query().name()),
OperationType::Mutation => self
.schema_definition
.mutation()
.map(ObjectTypeDefinition::name),
OperationType::Subscription => self
.schema_definition
.subscription()
.map(ObjectTypeDefinition::name),
};
if let Some(root_operation_type_definition_name) = root_operation_type_definition_name {
self.visit_selection_set(
operation_definition.selection_set(),
self.schema_definition
.get_type_definition(root_operation_type_definition_name)
.unwrap_or_else(|| {
panic!(
"Schema definition's `get_type` method returned `None` for {} root",
operation_definition.operation_type()
)
}),
);
}
}
fn visit_fragment_definition(&mut self, fragment_definition: &'a E::FragmentDefinition) {
let type_condition = self
.schema_definition
.get_type_definition(fragment_definition.type_condition());
if let Some(type_condition) = type_condition {
self.visit_selection_set(fragment_definition.selection_set(), type_condition);
}
}
fn visit_selection_set(
&mut self,
selection_set: &'a E::SelectionSet,
scoped_type: &'a TypeDefinitionReferenceFromAbstract<S::TypeDefinitionReference>,
) {
self.rule.visit_selection_set(selection_set, scoped_type);
selection_set.as_ref().iter().for_each(|selection| {
let contained_selection_set_and_type = match selection.as_ref() {
Selection::Field(f) => {
let field_definition = Self::fields_definition(scoped_type)
.and_then(|fields_definition| fields_definition.get_field(f.name()));
if let Some(field_definition) = field_definition {
self.visit_field(f, field_definition.r#type());
}
f.selection_set().and_then(|selection_set| {
field_definition
.and_then(|fd| {
self.schema_definition
.get_type_definition(fd.r#type().as_ref().base().name())
})
.map(|t| (selection_set, t))
})
}
Selection::InlineFragment(i) => {
let t = if let Some(type_condition) = i.type_condition() {
self.schema_definition.get_type_definition(type_condition)
} else {
Some(scoped_type)
};
t.map(|t| (i.selection_set(), t))
}
Selection::FragmentSpread(_) => None, };
if let Some((selection_set, t)) = contained_selection_set_and_type {
self.visit_selection_set(selection_set, t);
}
})
}
fn visit_field(&mut self, field: &'a E::Field, scoped_type: &'a S::OutputTypeReference) {
self.rule.visit_field(field, scoped_type);
}
pub fn validate(
executable_document: &'a E,
schema_definition: &'a S,
) -> <Self as IntoIterator>::IntoIter {
let mut instance = Self::new(executable_document, schema_definition);
instance.visit();
instance.into_iter()
}
fn fields_definition(
t: &'a TypeDefinitionReferenceFromAbstract<S::TypeDefinitionReference>,
) -> Option<&'a S::FieldsDefinition> {
match t {
TypeDefinitionReference::BuiltinScalarType(_)
| TypeDefinitionReference::CustomScalarType(_, _)
| TypeDefinitionReference::EnumType(_, _)
| TypeDefinitionReference::UnionType(_, _)
| TypeDefinitionReference::InputObjectType(_, _) => None,
TypeDefinitionReference::InterfaceType(itd, _) => {
Some(itd.as_ref().fields_definition())
}
TypeDefinitionReference::ObjectType(otd, _) => Some(otd.as_ref().fields_definition()),
}
}
}
impl<'a, E: ExecutableDocument, S: SchemaDefinition, R: Rule<'a, E, S>> IntoIterator
for Validator<'a, E, S, R>
{
type Item = Error<'a, E, S>;
type IntoIter = <R as IntoIterator>::IntoIter;
fn into_iter(self) -> Self::IntoIter {
self.rule.into_iter()
}
}