77 lines
2.1 KiB
Plaintext
77 lines
2.1 KiB
Plaintext
// @flow strict
|
|
|
|
import { GraphQLError } from '../../error/GraphQLError';
|
|
import { type ASTVisitor } from '../../language/visitor';
|
|
import { isEnumType } from '../../type/definition';
|
|
|
|
import { type SDLValidationContext } from '../ValidationContext';
|
|
|
|
export function duplicateEnumValueNameMessage(
|
|
typeName: string,
|
|
valueName: string,
|
|
): string {
|
|
return `Enum value "${typeName}.${valueName}" can only be defined once.`;
|
|
}
|
|
|
|
export function existedEnumValueNameMessage(
|
|
typeName: string,
|
|
valueName: string,
|
|
): string {
|
|
return `Enum value "${typeName}.${valueName}" already exists in the schema. It cannot also be defined in this type extension.`;
|
|
}
|
|
|
|
/**
|
|
* Unique enum value names
|
|
*
|
|
* A GraphQL enum type is only valid if all its values are uniquely named.
|
|
*/
|
|
export function UniqueEnumValueNames(
|
|
context: SDLValidationContext,
|
|
): ASTVisitor {
|
|
const schema = context.getSchema();
|
|
const existingTypeMap = schema ? schema.getTypeMap() : Object.create(null);
|
|
const knownValueNames = Object.create(null);
|
|
|
|
return {
|
|
EnumTypeDefinition: checkValueUniqueness,
|
|
EnumTypeExtension: checkValueUniqueness,
|
|
};
|
|
|
|
function checkValueUniqueness(node) {
|
|
const typeName = node.name.value;
|
|
|
|
if (!knownValueNames[typeName]) {
|
|
knownValueNames[typeName] = Object.create(null);
|
|
}
|
|
|
|
if (node.values) {
|
|
const valueNames = knownValueNames[typeName];
|
|
|
|
for (const valueDef of node.values) {
|
|
const valueName = valueDef.name.value;
|
|
|
|
const existingType = existingTypeMap[typeName];
|
|
if (isEnumType(existingType) && existingType.getValue(valueName)) {
|
|
context.reportError(
|
|
new GraphQLError(
|
|
existedEnumValueNameMessage(typeName, valueName),
|
|
valueDef.name,
|
|
),
|
|
);
|
|
} else if (valueNames[valueName]) {
|
|
context.reportError(
|
|
new GraphQLError(
|
|
duplicateEnumValueNameMessage(typeName, valueName),
|
|
[valueNames[valueName], valueDef.name],
|
|
),
|
|
);
|
|
} else {
|
|
valueNames[valueName] = valueDef.name;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|