@graphql-tools/graphql/cjs/validation/rules/UniqueEnumValueNamesRule.js

Fork of GraphQL.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.UniqueEnumValueNamesRule = void 0;
const GraphQLError_js_1 = require("../../error/GraphQLError.js");
const definition_js_1 = require("../../type/definition.js");
/**
 * Unique enum value names
 *
 * A GraphQL enum type is only valid if all its values are uniquely named.
 */
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) {
        var _a;
        const typeName = node.name.value;
        if (!knownValueNames[typeName]) {
            knownValueNames[typeName] = Object.create(null);
        }
        // FIXME: https://github.com/graphql/graphql-js/issues/2203
        /* c8 ignore next */
        const valueNodes = (_a = node.values) !== null && _a !== void 0 ? _a : [];
        const valueNames = knownValueNames[typeName];
        for (const valueDef of valueNodes) {
            const valueName = valueDef.name.value;
            const existingType = existingTypeMap[typeName];
            if ((0, definition_js_1.isEnumType)(existingType) && existingType.getValue(valueName)) {
                context.reportError(new GraphQLError_js_1.GraphQLError(`Enum value "${typeName}.${valueName}" already exists in the schema. It cannot also be defined in this type extension.`, { nodes: valueDef.name }));
            }
            else if (valueNames[valueName]) {
                context.reportError(new GraphQLError_js_1.GraphQLError(`Enum value "${typeName}.${valueName}" can only be defined once.`, {
                    nodes: [valueNames[valueName], valueDef.name],
                }));
            }
            else {
                valueNames[valueName] = valueDef.name;
            }
        }
        return false;
    }
}
exports.UniqueEnumValueNamesRule = UniqueEnumValueNamesRule;