@graphql-mesh/transport-rest/esm/directives/resolveRootField.js

import { isListType, isNonNullType } from 'graphql';
function isOriginallyListType(type) {
    if (isNonNullType(type)) {
        return isOriginallyListType(type.ofType);
    }
    return isListType(type);
}
export function processResolveRootFieldAnnotations(field, propertyName) {
    if (!field.resolve || field.resolve.name === 'defaultFieldResolver') {
        field.resolve = (root, args, context, info) => {
            const actualFieldObj = root[propertyName];
            if (actualFieldObj != null) {
                const isArray = Array.isArray(actualFieldObj);
                const isListType = isOriginallyListType(info.returnType);
                if (isListType && !isArray) {
                    return [actualFieldObj];
                }
                else if (!isListType && isArray) {
                    return actualFieldObj[0];
                }
            }
            return actualFieldObj;
        };
    }
}