GraphQL JS (ES6): Convert GraphQLObjectType to GraphQLInputObjectType

graphUtils.js

// GraphQL Utils

// Module Vars
import {
graphql,
GraphQLObjectType,
GraphQLInputObjectType,
GraphQLID
} from 'graphql';
import { isInputType } from 'graphql/type/definition';

export function convertToInputObjectType(input, objectType) {

  // Create the GraphQLInputObjectType fields by itterating over the provided GraphQLObjectType's fields
  const objectFields = objectType._typeConfig.fields();
  const inputObjectFields = {};

  for (const fieldName in objectFields) {

    // Make sure we only include fields that the mutation requires
    if (!input.hasOwnProperty(fieldName)) {
      continue;
    }

    let field = objectFields[fieldName];
    const fieldType = field.type;

    // If the field is not an Input Type, convert it to be so
    if (!isInputType(fieldType)) {

      const fieldInput = input[field];
      field.type = convertToInputObjectType(fieldInput, fieldType);

      // Use the field only if its' converted input type was returned
      if (field.type) {
        inputObjectFields[fieldName] = field;
      }
    } else {
      inputObjectFields[fieldName] = field;
    }
  }

  // Give the input object a name
  const inputObjectName = objectType.name + 'Input';

  const InputObject = new GraphQLInputObjectType({
    name: inputObjectName,
    fields: inputObjectFields
  });

  return InputObject;
}