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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/graphql/validation/rules

Просмотр файла: NoUnusedFragmentsRule.mjs

import { GraphQLError } from '../../error/GraphQLError.mjs';

/**
 * No unused fragments
 *
 * A GraphQL document is only valid if all fragment definitions are spread
 * within operations, or spread within other fragments spread within operations.
 *
 * See https://spec.graphql.org/draft/#sec-Fragments-Must-Be-Used
 */
export function NoUnusedFragmentsRule(context) {
  const operationDefs = [];
  const fragmentDefs = [];
  return {
    OperationDefinition(node) {
      operationDefs.push(node);
      return false;
    },

    FragmentDefinition(node) {
      fragmentDefs.push(node);
      return false;
    },

    Document: {
      leave() {
        const fragmentNameUsed = Object.create(null);

        for (const operation of operationDefs) {
          for (const fragment of context.getRecursivelyReferencedFragments(
            operation,
          )) {
            fragmentNameUsed[fragment.name.value] = true;
          }
        }

        for (const fragmentDef of fragmentDefs) {
          const fragName = fragmentDef.name.value;

          if (fragmentNameUsed[fragName] !== true) {
            context.reportError(
              new GraphQLError(`Fragment "${fragName}" is never used.`, {
                nodes: fragmentDef,
              }),
            );
          }
        }
      },
    },
  };
}

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