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docs/middleware/contextualizers/graphql.js
2021-12-15 12:28:39 -08:00

49 lines
2.0 KiB
JavaScript

import { readCompressedJsonFileFallback } from '../../lib/read-json-file.js'
import { allVersions } from '../../lib/all-versions.js'
const previews = readCompressedJsonFileFallback('./lib/graphql/static/previews.json')
const upcomingChanges = readCompressedJsonFileFallback('./lib/graphql/static/upcoming-changes.json')
const changelog = readCompressedJsonFileFallback('./lib/graphql/static/changelog.json')
const prerenderedObjects = readCompressedJsonFileFallback(
'./lib/graphql/static/prerendered-objects.json'
)
const prerenderedInputObjects = readCompressedJsonFileFallback(
'./lib/graphql/static/prerendered-input-objects.json'
)
const prerenderedMutations = readCompressedJsonFileFallback(
'./lib/graphql/static/prerendered-mutations.json'
)
const explorerUrl =
process.env.NODE_ENV === 'production'
? 'https://graphql.github.com/explorer'
: 'http://localhost:3000'
export default function graphqlContext(req, res, next) {
const currentVersionObj = allVersions[req.context.currentVersion]
// ignore requests to non-GraphQL reference paths
// and to versions that don't exist
if (!req.pagePath.includes('/graphql/') || !currentVersionObj) {
return next()
}
// Get the relevant name of the GraphQL schema files for the current version
// For example, free-pro-team@latest corresponds to dotcom,
// enterprise-server@2.22 corresponds to ghes-2.22,
// and github-ae@latest corresponds to ghae
const graphqlVersion = currentVersionObj.miscVersionName
req.context.graphql = {
schemaForCurrentVersion: readCompressedJsonFileFallback(
`lib/graphql/static/schema-${graphqlVersion}.json`
),
previewsForCurrentVersion: previews[graphqlVersion],
upcomingChangesForCurrentVersion: upcomingChanges[graphqlVersion],
prerenderedObjectsForCurrentVersion: prerenderedObjects[graphqlVersion],
prerenderedInputObjectsForCurrentVersion: prerenderedInputObjects[graphqlVersion],
prerenderedMutationsForCurrentVersion: prerenderedMutations[graphqlVersion],
explorerUrl,
changelog,
}
return next()
}