frags.js

const fetch = require('node-fetch')
const fs = require('fs')

// SEE: https://www.apollographql.com/docs/react/recipes/fragment-matching.html
fetch(`https://api.inhji.de/graphql`, {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    query: `
      {
        __schema {
          types {
            kind
            name
            possibleTypes {
              name
            }
          }
        }
      }
    `
  })
})
  .then(result => result.json())
  .then(result => {
    // here we're filtering out any type information unrelated to unions or interfaces
    const filteredData = result.data.__schema.types.filter(type => type.possibleTypes !== null)
    result.data.__schema.types = filteredData
    fs.writeFile('./src/lib/fragmentTypes.json', JSON.stringify(result.data), err => {
      if (err) console.error('Error writing fragmentTypes file', err)
      console.log('Fragment types successfully extracted!')
    })
  })