| import { GraphQLError } from '../../error/GraphQLError.mjs'; |
| |
| /** |
| * Lone Schema definition |
| * |
| * A GraphQL document is only valid if it contains only one schema definition. |
| */ |
| export function LoneSchemaDefinitionRule(context) { |
| var _ref, _ref2, _oldSchema$astNode; |
| |
| const oldSchema = context.getSchema(); |
| const alreadyDefined = |
| (_ref = |
| (_ref2 = |
| (_oldSchema$astNode = |
| oldSchema === null || oldSchema === void 0 |
| ? void 0 |
| : oldSchema.astNode) !== null && _oldSchema$astNode !== void 0 |
| ? _oldSchema$astNode |
| : oldSchema === null || oldSchema === void 0 |
| ? void 0 |
| : oldSchema.getQueryType()) !== null && _ref2 !== void 0 |
| ? _ref2 |
| : oldSchema === null || oldSchema === void 0 |
| ? void 0 |
| : oldSchema.getMutationType()) !== null && _ref !== void 0 |
| ? _ref |
| : oldSchema === null || oldSchema === void 0 |
| ? void 0 |
| : oldSchema.getSubscriptionType(); |
| let schemaDefinitionsCount = 0; |
| return { |
| SchemaDefinition(node) { |
| if (alreadyDefined) { |
| context.reportError( |
| new GraphQLError( |
| 'Cannot define a new schema within a schema extension.', |
| { |
| nodes: node, |
| }, |
| ), |
| ); |
| return; |
| } |
| |
| if (schemaDefinitionsCount > 0) { |
| context.reportError( |
| new GraphQLError('Must provide only one schema definition.', { |
| nodes: node, |
| }), |
| ); |
| } |
| |
| ++schemaDefinitionsCount; |
| }, |
| }; |
| } |