Convert Object to GraphQL QueryString

example.ts

// usage example
import { graphql, GraphqlQuery } from './obj-to-graphql';

const bookingsQuery: GraphqlQuery = {
    name: 'bookings',
    args: {
        page: 1,
        filter: { from: '2020-02-02' },
    },
    select: {
        totalRecords: true,
        data: {
            _id: true,
            event: {
                title: true,
                address: true,
            }
        }
    }
};

console.log(graphql(bookingsQuery));

obj-to-graphql.ts

export interface GraphqlQuery {
  name: string;
  args?: object;
  select: object;
}

export const graphqlQueryStrLN = '\n';

export function processArgs(obj?: object) {
  let str = '';
  if (!obj) {
    return str;
  }

  Object.keys(obj).forEach((k: any) => {
    let holds = obj[k];
    if (typeof holds === 'object') {
      holds = `{ ${processArgs(holds)} }`;
    } else if (typeof holds === 'string') {
      holds = `"${holds}"`;
    }
    const comma = str === '' ? '' : ',';
    str += `${comma}${k}:${holds}`
  });
  return str;
}

export function processSelect(obj?: object, space = ' ') {
  let str = ' {';
  if (!obj) { return str; }

  Object.keys(obj).forEach((k: any) => {
    const holds = obj[k];
    
    if (holds === false) {
          return;
    }

    const v = (typeof holds === 'object') ? processSelect(holds, space + ' ') : '';

    str += `${graphqlQueryStrLN}${space} ${k}${v}`;
  });
  str += `${graphqlQueryStrLN}${space}}`;
  return str;
}

export function processQuery(q: GraphqlQuery, space = ' ') {
  let str = graphqlQueryStrLN;

  str += `${space}${q.name}(${processArgs(q.args)})`;
  str += processSelect(q.select, space);
  return str;
}

export function graphql(...args: Array<GraphqlQuery>) {
  let query = '{';
  args.forEach((q) => {
    query += `${processQuery(q)}${graphqlQueryStrLN}`;
  });
  query += `}`;
  return query;
}

export default graphql;

It Converts this object

const bookingsQuery: GraphqlQuery = {
    name: 'bookings',
    args: {
        page: 1,
        filter: { from: '2020-02-02' },
    },
    select: {
        totalRecords: true,
        data: {
            _id: true,
            event: {
                title: true,
                address: true,
            }
        }
    }
};

to this

{
 bookings(page:1,filter:{ from:"2020-02-02" }) {
  totalRecords
  data {
   _id
   event {
    title
    address
   }
  }
 }
}