# PROJ-17: Document Notes

## Status: QA Passed
**Created:** 2026-03-06
**Last Updated:** 2026-03-06

## Dependencies
- Requires: PROJ-1 (HTTP Client Core) — for authenticated HTTP requests and error mapping
- Requires: PROJ-4 (Get Document) — notes are a sub-resource of documents

## User Stories
- As a developer, I want to list all notes on a document so that I can read annotations left by users.
- As a developer, I want to create a note on a document so that I can programmatically annotate documents.
- As a developer, I want to delete a note from a document so that I can remove outdated or incorrect annotations.

## Acceptance Criteria

### get_notes
- [ ] `get_notes(document_id: int) -> list[DocumentNote]` sends `GET /documents/{document_id}/notes/` and returns a validated list of `DocumentNote` instances.
- [ ] Returns an empty list when the document has no notes.
- [ ] Raises `NotFoundError` when the document does not exist (HTTP 404).
- [ ] Notes are returned in the order provided by the server (creation time, ascending).

### create_note
- [ ] `create_note(document_id: int, *, note: str) -> DocumentNote` sends `POST /documents/{document_id}/notes/` with `{"note": "<text>"}` and returns the newly created `DocumentNote`.
- [ ] The `note` parameter is required and must be a non-empty string (enforced by the server).
- [ ] Returns the newly created note object (not the full list).
- [ ] Raises `NotFoundError` when the document does not exist (HTTP 404).

### delete_note
- [ ] `delete_note(document_id: int, note_id: int) -> None` sends `DELETE /documents/{document_id}/notes/?id={note_id}` and returns `None` on success.
- [ ] Raises `NotFoundError` when the document or note does not exist (HTTP 404).

### DocumentNote model
- [ ] `DocumentNote` exposes: `id`, `note`, `created`, `document`, `user`.
- [ ] `id` is the unique note ID (integer).
- [ ] `note` is the text content.
- [ ] `created` is the creation timestamp (`datetime`).
- [ ] `document` is the parent document ID (integer).
- [ ] `user` is the ID of the user who created the note (integer, may be `None`).

### General
- [ ] No `update_note` method is provided — the paperless-ngx API has no PATCH/PUT endpoint for notes.
- [ ] All methods are available on `SyncPaperlessClient` with identical signatures (blocking wrapper).

## Edge Cases
- `create_note` with an empty string `note` → server returns HTTP 400; error propagated as-is.
- `delete_note` with a `note_id` that belongs to a different document → server returns HTTP 404; raised as `NotFoundError`.
- `get_notes` on a document with many notes → all notes returned in a single response (paperless-ngx does not paginate notes).
- Concurrent deletion of the same note → second call raises `NotFoundError`; callers should handle this gracefully.

---
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## Tech Design (Solution Architect)
_To be added by /architecture_

## QA Test Results

**Date:** 2026-03-08
**Tester:** QA Engineer (Claude)
**Status:** PASS — Production Ready

### Acceptance Criteria Results (17/17 passed)

#### get_notes
- [x] `get_notes(document_id: int) -> list[DocumentNote]` sends `GET /documents/{document_id}/notes/` and returns validated list — **PASS** (`test_get_notes`)
- [x] Returns empty list when document has no notes — **PASS** (`test_get_notes_empty`)
- [x] Raises `NotFoundError` on HTTP 404 — **PASS** (`test_get_notes_not_found`)
- [x] Notes returned in server-provided order — **PASS** (list comprehension preserves order)

#### create_note
- [x] `create_note(document_id: int, *, note: str) -> DocumentNote` sends POST with `{"note": "<text>"}` — **PASS** (`test_create_note`)
- [x] `note` parameter is required keyword-only — **PASS** (enforced by `*` in signature)
- [x] Returns the newly created note object (not the full list) — **PASS** (code extracts last item from list or single object)
- [x] Raises `NotFoundError` on HTTP 404 — **PASS** (`test_create_note_not_found`)

#### delete_note
- [x] `delete_note(document_id: int, note_id: int) -> None` sends `DELETE /documents/{document_id}/notes/?id={note_id}` — **PASS** (`test_delete_note` verifies query param)
- [x] Raises `NotFoundError` on HTTP 404 — **PASS** (`test_delete_note_not_found`)

#### DocumentNote model
- [x] Exposes `id`, `note`, `created`, `document`, `user` — **PASS** (verified in model definition)
- [x] `id` is integer — **PASS** (`int | None`)
- [x] `note` is text content — **PASS** (`str`)
- [x] `created` is datetime — **PASS** (`datetime | None`)
- [x] `document` is integer — **PASS** (`int | None`)
- [x] `user` is integer, may be None — **PASS** (`int | None`, with nested-user validator)

#### General
- [x] No `update_note` method provided — **PASS** (not in any mixin)
- [x] All methods available on `SyncPaperlessClient` with identical signatures — **PASS** (`test_sync_get_notes`, `test_sync_create_note`, `test_sync_delete_note`)

### Edge Cases Tested
- [x] Nested user object coerced to int — **PASS** (`test_get_notes_nested_user`, validator `_coerce_user`)
- [x] `model_config = ConfigDict(extra="ignore")` handles unexpected fields gracefully — **PASS**

### Static Analysis
- **mypy:** 0 issues (strict mode, all 3 source files)
- **ruff (source):** 0 issues (all source files clean)
- **ruff (tests):** 5 issues in `test_client_notes.py` (1 import sort, 4 line-too-long) — Low severity

### Test Coverage
- `_internal/mixins/notes.py`: 95% (1 missed line: list-response branch in `create_note`)
- `_internal/sync_mixins/notes.py`: 100%
- Full test suite: 354 passed, 0 failed

### Observations

| # | Severity | Description |
|---|----------|-------------|
| 1 | Low | `test_client_notes.py` has 5 ruff violations (1 import sort `I001`, 4 line-too-long `E501`). Auto-fixable. **FIXED** in commit `4454b35`. |
| 2 | Low | `create_note` list-response branch (line 61, the real paperless-ngx behavior) lacks a dedicated test. The single-object branch is tested instead. Coverage: 95%. **FIXED** — `test_create_note_list_response` added in commit `4454b35`. |

### Regression
- Full test suite (354 tests): all passed, no regressions detected.
- Sync client integration verified for all three note operations.

### Production-Ready: YES
No Critical or High bugs. Two Low-severity observations fixed in commit `4454b35`.

## Deployment
_To be added by /deploy_
