---
phase: 04-pdf-ingest
plan: 02
subsystem: api
tags: [next.js, api-routes, pdf, authentication, file-upload, path-traversal]

# Dependency graph
requires:
  - phase: 04-pdf-ingest
    provides: form_templates table + documents schema extension + seeds/forms/ directory
  - phase: 03-agent-portal-shell
    provides: auth pattern (auth() from @/lib/auth), db pattern, portal data layer
provides:
  - GET /api/forms-library — authenticated form template list ordered by name
  - POST /api/documents — creates document record + copies seed PDF or writes custom upload to uploads/clients/{clientId}/{uuid}.pdf
  - GET /api/documents/[id]/file — authenticated PDF streaming with path traversal guard
affects: [04-03, 04-04]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - node:fs/promises (copyFile, mkdir, writeFile, readFile) for local file operations — no cloud storage
    - Path traversal guard: destPath.startsWith(UPLOADS_DIR) before any fs write
    - uploads/ kept outside public/ — files never served as static assets
    - Relative paths stored in DB (clients/{clientId}/{uuid}.pdf) — not absolute paths
    - content-type header branching for multipart/form-data vs JSON in POST handler

key-files:
  created:
    - teressa-copeland-homes/src/app/api/forms-library/route.ts
    - teressa-copeland-homes/src/app/api/documents/route.ts
    - teressa-copeland-homes/src/app/api/documents/[id]/file/route.ts
  modified: []

key-decisions:
  - "uploads/ directory at project root (not under public/) — PDFs never accessible without auth"
  - "Relative paths stored in DB (clients/{clientId}/{uuid}.pdf) — absolute paths would break on server move"
  - "Path traversal guard on both write (POST) and read (GET /file) — prevents directory escape via malicious clientId or filePath"
  - "content-type branching in POST — single endpoint handles both form-data (custom upload) and JSON (template copy)"

patterns-established:
  - "File serving routes: always guard with startsWith(BASE_DIR) before readFile"
  - "File writing routes: always guard with startsWith(UPLOADS_DIR) before copyFile/writeFile"
  - "params is a Promise in Next.js 15 App Router dynamic routes — always await params before destructuring"

requirements-completed: [DOC-01, DOC-02]

# Metrics
duration: 1min
completed: 2026-03-20
---

# Phase 4 Plan 02: PDF API Routes Summary

**Three authenticated Next.js API routes: forms library list, document creation with seed-copy or file-upload, and path-traversal-guarded PDF streaming — PDFs never exposed as public static assets**

## Performance

- **Duration:** ~1 min
- **Started:** 2026-03-20T03:36:04Z
- **Completed:** 2026-03-20T03:37:09Z
- **Tasks:** 2
- **Files modified:** 3

## Accomplishments
- Created GET /api/forms-library that returns authenticated JSON list of form_templates ordered by name
- Created POST /api/documents that handles both template-copy (JSON body) and custom-upload (multipart/form-data) paths, writes to uploads/clients/{clientId}/{uuid}.pdf, inserts documents row
- Created GET /api/documents/[id]/file that streams PDF bytes with Content-Type: application/pdf, guarded by path traversal check
- All three routes return 401 for unauthenticated requests
- uploads/ directory at project root (not under public/), so no file is accessible without going through auth

## Task Commits

Each task was committed atomically:

1. **Task 1: GET /api/forms-library authenticated template list** - `e0f180c` (feat)
2. **Task 2: POST /api/documents and GET /api/documents/[id]/file routes** - `32e129c` (feat)

**Plan metadata:** (docs commit below)

## Files Created/Modified
- `teressa-copeland-homes/src/app/api/forms-library/route.ts` - Authenticated GET: queries form_templates ordered by name, returns JSON array
- `teressa-copeland-homes/src/app/api/documents/route.ts` - Authenticated POST: branches on content-type, copies/writes PDF to uploads/, inserts documents row
- `teressa-copeland-homes/src/app/api/documents/[id]/file/route.ts` - Authenticated GET: streams PDF from uploads/ with path traversal guard

## Decisions Made
- uploads/ at project root not under public/ — PDFs only served through authenticated routes, never as static files
- Relative paths stored in DB (e.g. `clients/abc/uuid.pdf`) — absolute paths break if the project moves; always join with UPLOADS_BASE at read time
- Path traversal guard on both write and read operations — a malicious clientId like `../../etc` would be caught before any fs operation
- content-type branching in single POST endpoint — keeps document creation API surface minimal for the UI in Plan 03

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None.

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- All three API routes deployed and responding with correct auth behavior
- Plan 03 (UI) can call POST /api/documents with clientId + formTemplateId (JSON) or clientId + file (multipart)
- Plan 03 can call GET /api/forms-library to populate the modal selector
- Plan 04 (document management) can call GET /api/documents/[id]/file to preview or download PDFs

---
*Phase: 04-pdf-ingest*
*Completed: 2026-03-20*

## Self-Check: PASSED

- forms-library/route.ts: FOUND
- documents/route.ts: FOUND
- documents/[id]/file/route.ts: FOUND
- 04-02-SUMMARY.md: FOUND
- commit e0f180c: FOUND
- commit 32e129c: FOUND
