Add possibility to rename Upload scalar

Hey,

It would be great to have a possibility to rename scalar. I tried this code, but it is still named Upload:

import { GraphQLUpload } from 'apollo-upload-server'

const imageTypeDefs = `
  scalar Image
`

const imageResolvers = {
  Image: GraphQLUpload
}

[jaydenseric]

The best way to validate uploads is to do it the same way you would for any mutation argument; in the mutation resolver.

For example:

scalar Upload

type Image {
  filename: String!
  filesize: Int!
  width: Int!
  height: Int!
  url: String!
}

type UploadImageErrors {
  image: [String!]
}

type UploadImagePayload {
  errors: UploadImageErrors
  image: Image
}

uploadImage (image: Upload!): UploadImagePayload!

In the uploadImage mutation resolver:

(obj, { image }) => {
  const { stream, filename, mimetype, encoding } = await image

  const payload = {
    errors: {
      image: []
    }
  }

  if (mimetype !== 'image/png') payload.errors.image.push('Must be a PNG file.')

  // Handle stream, either wasting or storing it based on validation so far…

  if (
    // Image stream was truncated due to maxFileSize
  ) payload.errors.image.push('Filesize too big.')

  if (
    // Image stored ok, and we have determined filesize, width, etc.
  ) payload.image = {
    filename,
    filesize
    width
    height
    url
  }

  if (!payload.errors.image.length) delete payload.errors.image
  if (!Object.keys(payload.errors).length) delete payload.errors

  return payload
}

[vladshcherbin]

@jaydenseric thank you, this will definitely help 👍