Support data-driven tables (#57806)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/data-directory/middleware/data-tables.ts

@@ -0,0 +1,26 @@
+import type { NextFunction, Response } from 'express'
+import { ExtendedRequest } from '@/types'
+import { getDeepDataByLanguage } from '@/data-directory/lib/get-data'
+
+let tablesCache: Record<string, unknown> | null = null
+
+// Lazy loading function
+const getTables = () => {
+  if (!tablesCache) {
+    // Keep product-name-heavy reference tables in English only for now
+    tablesCache = getDeepDataByLanguage('tables', 'en')
+  }
+  return tablesCache
+}
+
+/**
+ * Middleware that loads data-driven table content into the request context.
+ * Tables are sourced from YAML files in data/tables/ directory.
+ */
+export default async function dataTables(req: ExtendedRequest, res: Response, next: NextFunction) {
+  if (!req.context) throw new Error('request not contextualized')
+
+  req.context.tables = getTables()
+
+  return next()
+}

src/fixtures/fixtures/data/tables/supported-languages.yml

@@ -0,0 +1,13 @@
+features:
+  foo:
+    name: 'Foo Feature'
+    fptAndGhec: true
+    ghes: false
+  bar:
+    name: 'Bar Feature'
+    fptAndGhec: true
+    ghes: true
+supported:
+  BeepBoop:
+    foo: 'supported'
+    bar: 'not-supported'

src/frame/middleware/index.ts

@@ -35,6 +35,7 @@ import robots from './robots'
 import earlyAccessLinks from '@/early-access/middleware/early-access-links'
 import categoriesForSupport from './categories-for-support'
 import triggerError from '@/observability/middleware/trigger-error'
+import dataTables from '@/data-directory/middleware/data-tables'
 import secretScanning from '@/secret-scanning/middleware/secret-scanning'
 import ghesReleaseNotes from '@/release-notes/middleware/ghes-release-notes'
 import whatsNewChangelog from './context/whats-new-changelog'
@@ -256,6 +257,7 @@ export default function (app: Express) {
   app.head('/*path', fastHead)
 
   // *** Preparation for render-page: contextualizers ***
+  app.use(asyncMiddleware(dataTables))
   app.use(asyncMiddleware(secretScanning))
   app.use(asyncMiddleware(ghesReleaseNotes))
   app.use(asyncMiddleware(whatsNewChangelog))