@omnigraph/odata/esm/resolvers/singularNavResolver.js

import { parseResolveInfo } from 'graphql-parse-resolve-info';
import urljoin from 'url-join';
import { getDirectiveExtensions, mapMaybePromise } from '@graphql-tools/utils';
import { Request } from '@whatwg-node/fetch';
import { addIdentifierToUrl } from '../utils/addIdentifierToUrl.js';
import { getUrlString } from '../utils/getUrlString.js';
import { handleResponseText } from '../utils/handleResponseText.js';
import { prepareSearchParams } from '../utils/prepareSearchParams.js';
export function createSingularNavResolver({ navigationPropertyName, dataloaderFactory, expandNavProps, headersFactory, }) {
    return function singularNavResolver(root, args, context, info) {
        if (navigationPropertyName in root) {
            return root[navigationPropertyName];
        }
        const url = new URL(root['@odata.id']);
        url.href = urljoin(url.href, '/' + navigationPropertyName);
        const returnType = info.returnType;
        const returnTypeDirectives = getDirectiveExtensions(returnType);
        const entityInfo = returnTypeDirectives.entityInfo[0];
        addIdentifierToUrl(url, entityInfo.identifierFieldName, entityInfo.identifierFieldTypeRef, args);
        const parsedInfoFragment = parseResolveInfo(info);
        const searchParams = prepareSearchParams({
            fragment: parsedInfoFragment,
            schema: info.schema,
            expandNavProps,
        });
        searchParams?.forEach((value, key) => {
            url.searchParams.set(key, value);
        });
        const urlString = getUrlString(url);
        const method = 'GET';
        const request = new Request(urlString, {
            method,
            headers: headersFactory({
                root,
                args,
                context,
                info,
                env: process.env,
            }, method),
        });
        return mapMaybePromise(dataloaderFactory(context).load(request), response => mapMaybePromise(response.text(), responseText => handleResponseText(responseText, urlString, info)));
    };
}