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/** @format */
import { gql } from 'https://deno.land/x/oak_graphql/mod.ts';
export function mapSelectionSet(query) {  // Gets fields from query and stores all in an array - used to selectively query cache  const selectionKeysMap = {};  const ast = gql(query);  const selections = ast.definitions[0].selectionSet.selections;  const tableName = selections[0].name.value;
  const recursiveMap = (recurseSelections) => {    for (const selection of recurseSelections) {      if (selection.name && selection.name.value) {        selectionKeysMap[selection.name.value] = selection.name.value;      }      if (selection.alias && selection.alias.value) {        selectionKeysMap[selection.alias.value] = selection.name.value;      }
      if (selection.selectionSet && selection.selectionSet.selections) {        recursiveMap(selection.selectionSet.selections);      }    }  };  recursiveMap(selections);
  // filter out table name from array, leaving only fields  const selectedFields = Object.keys(selectionKeysMap).filter(    (key) => key !== tableName  );  return selectedFields;}