swc/crates/swc_bundler/tests/.cache/deno/da72e428bb685926256311dffdf9fe2470a1ffe6.ts
2021-11-09 20:42:49 +09:00

48 lines
1.7 KiB
TypeScript

// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/validation/rules/UniqueEnumValueNamesRule.js
import { GraphQLError } from '../../error/GraphQLError.js';
import { isEnumType } from '../../type/definition.js';
/**
* Unique enum value names
*
* A GraphQL enum type is only valid if all its values are uniquely named.
*/
export function UniqueEnumValueNamesRule(context) {
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);
}
/* istanbul ignore next (See https://github.com/graphql/graphql-js/issues/2203) */
const valueNodes = node.values ?? [];
const valueNames = knownValueNames[typeName];
for (const valueDef of valueNodes) {
const valueName = valueDef.name.value;
const existingType = existingTypeMap[typeName];
if (isEnumType(existingType) && existingType.getValue(valueName)) {
context.reportError(new GraphQLError(`Enum value "${typeName}.${valueName}" already exists in the schema. It cannot also be defined in this type extension.`, valueDef.name));
} else if (valueNames[valueName]) {
context.reportError(new GraphQLError(`Enum value "${typeName}.${valueName}" can only be defined once.`, [valueNames[valueName], valueDef.name]));
} else {
valueNames[valueName] = valueDef.name;
}
}
return false;
}
}