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use crate::context::QueryPathNode;
use crate::parser::query::OperationDefinition;
use crate::{registry, Pos, QueryPathSegment, Value, Variables};
use std::collections::HashSet;
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum Scope<'a> {
Operation(Option<&'a str>),
Fragment(&'a str),
}
fn valid_error(path_node: &QueryPathNode, msg: String) -> String {
format!("\"{}\", {}", path_node, msg)
}
pub fn referenced_variables(value: &Value) -> Vec<&str> {
let mut vars = Vec::new();
referenced_variables_to_vec(value, &mut vars);
vars
}
fn referenced_variables_to_vec<'a>(value: &'a Value, vars: &mut Vec<&'a str>) {
match value {
Value::Variable(name) => {
vars.push(name);
}
Value::List(values) => values
.iter()
.for_each(|value| referenced_variables_to_vec(value, vars)),
Value::Object(obj) => obj
.values()
.for_each(|value| referenced_variables_to_vec(value, vars)),
_ => {}
}
}
pub fn operation_name(operation_definition: &OperationDefinition) -> (Option<&str>, Pos) {
match operation_definition {
OperationDefinition::SelectionSet(selection_set) => (None, selection_set.position()),
OperationDefinition::Query(query) => {
(query.name.as_ref().map(|n| n.as_str()), query.position())
}
OperationDefinition::Mutation(mutation) => (
mutation.name.as_ref().map(|n| n.as_str()),
mutation.position(),
),
OperationDefinition::Subscription(subscription) => (
subscription.name.as_ref().map(|n| n.as_str()),
subscription.position(),
),
}
}
pub fn is_valid_input_value(
registry: ®istry::Registry,
variables: Option<&Variables>,
type_name: &str,
value: &Value,
path_node: QueryPathNode,
) -> Option<String> {
if let Value::Variable(_) = value {
return None;
}
match registry::MetaTypeName::create(type_name) {
registry::MetaTypeName::NonNull(type_name) => match value {
Value::Null => Some(valid_error(
&path_node,
format!("expected type \"{}\"", type_name),
)),
_ => is_valid_input_value(registry, variables, type_name, value, path_node),
},
registry::MetaTypeName::List(type_name) => match value {
Value::List(elems) => {
for (idx, elem) in elems.iter().enumerate() {
if let Some(reason) = is_valid_input_value(
registry,
variables,
type_name,
elem,
QueryPathNode {
parent: Some(&path_node),
segment: QueryPathSegment::Index(idx),
},
) {
return Some(reason);
}
}
None
}
_ => is_valid_input_value(registry, variables, type_name, value, path_node),
},
registry::MetaTypeName::Named(type_name) => {
if let Value::Null = value {
return None;
}
if let Some(ty) = registry.types.get(type_name) {
match ty {
registry::MetaType::Scalar { is_valid, .. } => {
let value = match value {
Value::Variable(var_name) => {
variables.and_then(|variables| variables.get(var_name))
}
_ => Some(value),
};
if let Some(value) = value {
if !is_valid(value) {
Some(valid_error(
&path_node,
format!("expected type \"{}\"", type_name),
))
} else {
None
}
} else {
None
}
}
registry::MetaType::Enum { enum_values, .. } => match value {
Value::Enum(name) => {
if !enum_values.contains_key(name.as_str()) {
Some(valid_error(
&path_node,
format!(
"enumeration type \"{}\" does not contain the value \"{}\"",
ty.name(),
name
),
))
} else {
None
}
}
_ => Some(valid_error(
&path_node,
format!("expected type \"{}\"", type_name),
)),
},
registry::MetaType::InputObject { input_fields, .. } => match value {
Value::Object(values) => {
let mut input_names = values
.keys()
.map(|name| name.as_ref())
.collect::<HashSet<_>>();
for field in input_fields.values() {
input_names.remove(field.name);
if let Some(value) = values.get(field.name) {
if let Some(validator) = &field.validator {
let value = match value {
Value::Variable(var_name) => variables
.and_then(|variables| variables.get(var_name)),
_ => Some(value),
};
if let Some(value) = value {
if let Some(reason) = validator.is_valid(value) {
return Some(valid_error(
&QueryPathNode {
parent: Some(&path_node),
segment: QueryPathSegment::Name(field.name),
},
reason,
));
}
}
}
if let Some(reason) = is_valid_input_value(
registry,
variables,
&field.ty,
value,
QueryPathNode {
parent: Some(&path_node),
segment: QueryPathSegment::Name(field.name),
},
) {
return Some(reason);
}
} else if registry::MetaTypeName::create(&field.ty).is_non_null()
&& field.default_value.is_none()
{
return Some(valid_error(
&path_node,
format!(
"field \"{}\" of type \"{}\" is required but not provided",
field.name,
ty.name(),
),
));
}
}
if let Some(name) = input_names.iter().next() {
return Some(valid_error(
&path_node,
format!("unknown field \"{}\" of type \"{}\"", name, ty.name()),
));
}
None
}
_ => None,
},
_ => None,
}
} else {
unreachable!()
}
}
}
}