dorfteich/apps/api/src/health
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Add PDF export via Gotenberg (#67)
Server-side PDF export for reading/sharing (ADR 0009), rendered by a new
internal Gotenberg (headless Chromium) sidecar.

- Sidecar: `gotenberg/gotenberg:8` in the compose stack (internal, pinned,
  healthcheck); api `GOTENBERG_URL` env; a `renderer` readyz check at
  warning-level (mirrors the converter) so PDF export degrades gracefully when
  Gotenberg is down without failing readyz.
- Export HTML: `buildPdfHtml` renders a self-contained document (no app chrome)
  — the page's content with images inlined as data URIs, the pond's fonts
  inlined as base64 `@font-face` + applied via CSS variables (ADR 0016), print
  CSS (A4, page-break rules, a title header), and page numbers from Gotenberg's
  footer. Plugin-block fallbacks are a marked TODO(#79) for M7.
- Fonts in the api image: the api Dockerfile now bakes the font catalog in
  (`build-fonts.mjs` with FONTS_OUT) so the exporter can read a pond's chosen
  WOFF2 and inline them; a missing file falls back to the system stack.
- Job flow: `POST /pages/:id/export {format: pdf}` builds the HTML (read
  permission checked by the guard) and enqueues an `export_pdf` job on the #62
  queue with the HTML as input; the worker branches `to === 'pdf'` to the
  `GotenbergRenderer` (html → pdf) instead of pandoc, retrying an unreachable
  sidecar and failing a refused render (`renderer_unavailable`/`render_failed`,
  de+en). The client polls and downloads `GET /jobs/:id/result`.
- Frontend: the page-menu PDF button is now a real export (PDF added to
  EXPORT_FORMATS; the disabled placeholder removed).
- Tests: export.service.db PDF cases (HTML has title/font-variable/inlined
  image; renderer-down fails with `render_failed`); e2e PDF export self-skips
  without a Gotenberg sidecar (like the .docx case). Verified locally against
  real Gotenberg — a valid PDF with the pond font embedded.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EwZ4jR4KFAPvpjWevfUGX1
2026-07-10 12:11:12 +02:00
..
health.controller.ts Add authentication: signup, verification, sessions, password reset 2026-07-05 05:22:31 +02:00
health.e2e.test.ts Add Prisma with PostgreSQL, automatic migrations, and /readyz 2026-07-04 19:16:44 +02:00
health.module.ts Add Prisma with PostgreSQL, automatic migrations, and /readyz 2026-07-04 19:16:44 +02:00
readiness.service.ts Add PDF export via Gotenberg (#67) 2026-07-10 12:11:12 +02:00