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use std::sync::Arc;
use crate::{
diagnostics::{ApolloDiagnostic, DiagnosticData, Label},
hir::{self, TypeDefinition, Value},
validation::ValidationDatabase,
};
macro_rules! unsupported_type {
($db: expr, $value: expr, $type_def: expr) => {{
ApolloDiagnostic::new(
$db,
$value.loc().into(),
DiagnosticData::UnsupportedValueType {
value: $value.kind().into(),
ty: $type_def.name().into(),
},
)
.labels([
Label::new(
$type_def.loc().unwrap(),
format!("field declared here as {} type", $type_def.name()),
),
Label::new(
$value.loc(),
format!("argument declared here is of {} type", $value.kind()),
),
])
}};
}
pub fn validate_values(
db: &dyn ValidationDatabase,
ty: &hir::Type,
arg: &hir::Argument,
var_defs: Arc<Vec<hir::VariableDefinition>>,
) -> Result<(), Vec<ApolloDiagnostic>> {
let mut diagnostics = Vec::new();
value_of_correct_type(db, ty, arg.value(), var_defs, &mut diagnostics);
match diagnostics.len() {
0 => Ok(()),
_ => Err(diagnostics),
}
}
pub fn value_of_correct_type(
db: &dyn ValidationDatabase,
ty: &hir::Type,
val: &Value,
var_defs: Arc<Vec<hir::VariableDefinition>>,
diagnostics: &mut Vec<ApolloDiagnostic>,
) {
let type_def = ty.type_def(db.upcast());
if let Some(type_def) = type_def {
match val {
// When expected as an input type, only integer input values are
// accepted. All other input values, including strings with numeric
// content, must raise a request error indicating an incorrect
// type. If the integer input value represents a value less than
// -231 or greater than or equal to 231, a request error should be
// raised.
// When expected as an input type, any string (such as "4") or
// integer (such as 4 or -4) input value should be coerced to ID
Value::Int { value: int, .. } => match &type_def {
TypeDefinition::ScalarTypeDefinition(scalar) => {
if scalar.is_int() || scalar.is_float() || scalar.is_id() {
if int.to_i32_checked().is_none() {
diagnostics.push(
ApolloDiagnostic::new(
db,
val.loc().into(),
DiagnosticData::IntCoercionError {
value: int.get().to_string(),
},
)
.label(Label::new(
val.loc(),
"cannot be coerced to an 32-bit integer",
)),
)
}
} else if scalar.is_string() || scalar.is_boolean() {
diagnostics.push(unsupported_type!(db, val, ty));
}
}
_ => diagnostics.push(unsupported_type!(db, val, ty)),
},
// When expected as an input type, both integer and float input
// values are accepted. All other input values, including strings
// with numeric content, must raise a request error indicating an
// incorrect type.
Value::Float { .. } => match &type_def {
TypeDefinition::ScalarTypeDefinition(scalar) => {
if !scalar.is_float() && !scalar.is_custom() {
diagnostics.push(unsupported_type!(db, val, ty));
}
}
_ => diagnostics.push(unsupported_type!(db, val, ty)),
},
// When expected as an input type, only valid Unicode string input
// values are accepted. All other input values must raise a request
// error indicating an incorrect type.
// When expected as an input type, any string (such as "4") or
// integer (such as 4 or -4) input value should be coerced to ID
Value::String { .. } => match &type_def {
TypeDefinition::ScalarTypeDefinition(scalar) => {
// specifically return diagnostics for ints, floats, and
// booleans.
// string, ids and custom scalars are ok, and
// don't need a diagnostic.
if !scalar.is_string() && !scalar.is_id() && !scalar.is_custom() {
diagnostics.push(unsupported_type!(db, val, ty));
}
}
_ => diagnostics.push(unsupported_type!(db, val, ty)),
},
// When expected as an input type, only boolean input values are
// accepted. All other input values must raise a request error
// indicating an incorrect type.
Value::Boolean { .. } => match &type_def {
TypeDefinition::ScalarTypeDefinition(scalar) => {
if !scalar.is_boolean() && !scalar.is_custom() {
diagnostics.push(unsupported_type!(db, val, ty));
}
}
_ => diagnostics.push(unsupported_type!(db, val, ty)),
},
Value::Null { .. } => {
if !type_def.is_enum_type_definition() && !type_def.is_scalar_type_definition() {
diagnostics.push(unsupported_type!(db, val, ty));
}
}
Value::Variable(ref var) => match &type_def {
TypeDefinition::ScalarTypeDefinition(_)
| TypeDefinition::EnumTypeDefinition(_)
| TypeDefinition::InputObjectTypeDefinition(_) => {
let var_def = var_defs.iter().find(|v| v.name() == var.name());
if let Some(var_def) = var_def {
// we don't have the actual variable values here, so just
// compare if two Types are the same
if var_def.ty().name() != type_def.name() {
diagnostics.push(unsupported_type!(db, val.clone(), ty));
} else if let Some(default_value) = var_def.default_value() {
if var_def.ty().is_non_null() && default_value.is_null() {
diagnostics.push(unsupported_type!(db, default_value, var_def.ty()))
} else {
value_of_correct_type(
db,
var_def.ty(),
default_value,
var_defs.clone(),
diagnostics,
)
}
}
}
}
_ => diagnostics.push(unsupported_type!(db, val, ty)),
},
// GraphQL has a constant literal to represent enum input values.
// GraphQL string literals must not be accepted as an enum input and
// instead raise a request error.
Value::Enum { ref value, loc } => match &type_def {
TypeDefinition::EnumTypeDefinition(enum_) => {
let enum_val = enum_.values().find(|v| v.enum_value() == value.src());
if enum_val.is_none() {
diagnostics.push(
ApolloDiagnostic::new(
db,
(*loc).into(),
DiagnosticData::UndefinedValue {
value: value.src().into(),
definition: type_def.name().into(),
},
)
.label(Label::new(
val.loc(),
format!("does not exist on `{}` type", type_def.name()),
)),
);
}
}
_ => diagnostics.push(unsupported_type!(db, val, ty)),
},
// When expected as an input, list values are accepted only when
// each item in the list can be accepted by the list’s item type.
//
// If the value passed as an input to a list type is not a list and
// not the null value, then the result of input coercion is a list
// of size one, where the single item value is the result of input
// coercion for the list’s item type on the provided value (note
// this may apply recursively for nested lists).
Value::List { value: ref li, .. } => match &type_def {
TypeDefinition::ScalarTypeDefinition(_)
| TypeDefinition::EnumTypeDefinition(_)
| TypeDefinition::InputObjectTypeDefinition(_) => li
.iter()
.for_each(|v| value_of_correct_type(db, ty, v, var_defs.clone(), diagnostics)),
_ => diagnostics.push(unsupported_type!(db, val, ty)),
},
Value::Object { value: ref obj, .. } => match &type_def {
TypeDefinition::ScalarTypeDefinition(scalar) if scalar.is_custom() => (),
TypeDefinition::InputObjectTypeDefinition(input_obj) => {
let undefined_field = obj
.iter()
.find(|(name, ..)| !input_obj.fields().any(|f| f.name() == name.src()));
// Add a diagnostic if a value does not exist on the input
// object type
if let Some((name, value)) = undefined_field {
diagnostics.push(
ApolloDiagnostic::new(
db,
value.loc().into(),
DiagnosticData::UndefinedValue {
value: name.src().into(),
definition: type_def.name().into(),
},
)
.label(Label::new(
value.loc(),
format!("does not exist on `{}` type", type_def.name()),
)),
);
}
input_obj.fields().for_each(|f| {
let ty = f.ty();
let is_missing = !obj.iter().any(|(name, ..)| f.name() == name.src());
let is_null = obj
.iter()
.any(|(name, value)| f.name() == name.src() && value.is_null());
// If the input object field type is non_null, and no
// default value is provided, or if the value provided
// is null or missing entirely, an error should be
// raised.
if (ty.is_non_null() && f.default_value().is_none())
&& (is_missing || is_null)
{
let mut diagnostic = ApolloDiagnostic::new(
db,
val.loc().into(),
DiagnosticData::RequiredArgument {
name: f.name().into(),
},
);
diagnostic = diagnostic.label(Label::new(
val.loc(),
format!("missing value for argument `{}`", f.name()),
));
if let Some(loc) = ty.loc() {
diagnostic =
diagnostic.label(Label::new(loc, "argument defined here"));
}
diagnostics.push(diagnostic)
}
let used_val = obj.iter().find(|(name, ..)| name.src() == f.name());
if let Some((_, v)) = used_val {
value_of_correct_type(db, ty, v, var_defs.clone(), diagnostics);
}
})
}
_ => diagnostics.push(unsupported_type!(db, val, ty)),
},
};
}
}