text: const previews = require('../../lib/graphql/static/previews')
  const upcomingChanges = require('../../lib/graphql/static/upcoming-changes')
  const changelog = require('../../lib/graphql/static/changelog')
  const prerenderedObjects = require('../../lib/graphql/static/prerendered-objects')
  const { getOldVersionFromNewVersion } = require('../../lib/old-versions-utils')
  
  // TODO do we need to support staging? https://graphql-stage.github.com/explorer
  const explorerUrl = process.env.NODE_ENV === 'production'
    ? 'https://graphql.github.com/explorer'
    : 'http://localhost:3000'
  
  module.exports = async (req, res, next) => {
    // ignore requests to non-GraphQL reference paths
    if (!req.path.includes('/graphql/')) return next()
  
    // TODO need to update this to the new versions in coordination with the updater scripts
    const currentOldVersion = getOldVersionFromNewVersion(req.context.currentVersion)
  
    req.context.graphql = {
      schemaForCurrentVersion: require(`../../lib/graphql/static/schema-${currentOldVersion}`),
      previewsForCurrentVersion: previews[currentOldVersion],
      upcomingChangesForCurrentVersion: upcomingChanges[currentOldVersion],
      prerenderedObjectsForCurrentVersion: prerenderedObjects[currentOldVersion],
      explorerUrl,
      changelog
    }
  
    return next()
  }
  