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use std::collections::HashSet;
use async_graphql_value::{ConstValue, Value};
use crate::{QueryPathSegment, context::QueryPathNode, registry};
#[derive(Debug, Copy, 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 is_valid_input_value(
registry: ®istry::Registry,
type_name: &str,
value: &ConstValue,
path_node: QueryPathNode,
) -> Option<String> {
match registry::MetaTypeName::create(type_name) {
registry::MetaTypeName::NonNull(type_name) => match value {
ConstValue::Null => Some(valid_error(
&path_node,
format!("expected type \"{}\"", type_name),
)),
_ => is_valid_input_value(registry, type_name, value, path_node),
},
registry::MetaTypeName::List(type_name) => match value {
ConstValue::List(elems) => elems.iter().enumerate().find_map(|(idx, elem)| {
is_valid_input_value(
registry,
type_name,
elem,
QueryPathNode {
parent: Some(&path_node),
segment: QueryPathSegment::Index(idx),
},
)
}),
ConstValue::Null => None,
_ => is_valid_input_value(registry, type_name, value, path_node),
},
registry::MetaTypeName::Named(type_name) => {
if let ConstValue::Null = value {
return None;
}
match registry
.types
.get(type_name)
.unwrap_or_else(|| panic!("Type `{}` not defined", type_name))
{
registry::MetaType::Scalar {
is_valid: Some(is_valid_fn),
..
} => {
if (is_valid_fn)(&value) {
None
} else {
Some(valid_error(
&path_node,
format!("expected type \"{}\"", type_name),
))
}
}
registry::MetaType::Scalar { is_valid: None, .. } => None,
registry::MetaType::Enum {
enum_values,
name: enum_name,
..
} => match value {
ConstValue::Enum(name) => {
if !enum_values.contains_key(name.as_str()) {
Some(valid_error(
&path_node,
format!(
"enumeration type \"{}\" does not contain the value \"{}\"",
enum_name, name
),
))
} else {
None
}
}
ConstValue::String(name) => {
if !enum_values.contains_key(name.as_str()) {
Some(valid_error(
&path_node,
format!(
"enumeration type \"{}\" does not contain the value \"{}\"",
enum_name, name
),
))
} else {
None
}
}
_ => Some(valid_error(
&path_node,
format!("expected type \"{}\"", type_name),
)),
},
registry::MetaType::InputObject {
input_fields,
name: object_name,
oneof,
..
} => match value {
ConstValue::Object(values) => {
if *oneof {
if values.len() != 1 {
return Some(valid_error(
&path_node,
"Oneof input objects requires have exactly one field"
.to_string(),
));
}
if let ConstValue::Null = values[0] {
return Some(valid_error(
&path_node,
"Oneof Input Objects require that exactly one field must be supplied and that field must not be null"
.to_string(),
));
}
}
let mut input_names =
values.keys().map(AsRef::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(reason) = is_valid_input_value(
registry,
&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!(
r#"field "{}" of type "{}" is required but not provided"#,
field.name, field.ty,
),
));
}
}
if let Some(name) = input_names.iter().next() {
return Some(valid_error(
&path_node,
format!("unknown field \"{}\" of type \"{}\"", name, object_name),
));
}
None
}
_ => None,
},
_ => None,
}
}
}
}