arr-summary/CLAUDE.md

# Arr Summary (Greendale)

Flask dashboard aggregating status from the user's self-hosted media stack
— Sonarr, Radarr, SABnzbd, Tautulli, Prowlarr, Ombi — plus Unraid array
stats and a Rotten Tomatoes "what's popular that I don't have yet" feed.
Branded "Media Centre" — a single neutral, professional dark theme (the
earlier five novelty themes were removed). Runs as one Docker container on
the user's Unraid home server. Server-side project directory is still named
`greendale`; the container/repo are named `arr-summary`.

## Architecture

- **`app.py`** — single Flask app, session-based single-shared-password
  auth (`LOGIN_PASSWORD` env var, hashed comparison; can be changed at
  runtime via `/api/change-password`, persisted to `settings.json`).
  Supports running behind a reverse-proxy subpath via `SCRIPT_NAME` +
  `ScriptNameMiddleware` + `ProxyFix` (currently deployed at domain root,
  not a subpath, but the capability exists — see `nginx/` configs for
  both).
  - Per-service client functions (`sonarr_get`, `radarr_get`,
    `sabnzbd_get`, `tautulli_get`, `prowlarr_get`, `ombi_get`) each call
    that service's REST API directly with its API key from env vars.
  - The dashboard route (`/`) fetches all services **in parallel** via
    `ThreadPoolExecutor` with a hard 5-second wall-clock deadline — any
    slow/unreachable service degrades to an error dict rather than
    blocking the whole page. This matters for remote/cellular access.
  - Aggressive per-service caching with different TTLs tuned to how often
    each actually changes: Sonarr/Radarr library lists 5 min (the biggest
    latency cost — full Radarr list is ~4.4MB), Tautulli stats 2 min,
    SABnzbd history 10 min, Ombi requests 4 hours, Rotten Tomatoes scrapes
    4 hours. Active streams (Tautulli) and the SABnzbd queue are always
    fetched live, never cached — those need to be current-second accurate.
  - Rotten Tomatoes / IMDB are scraped directly (`requests` +
    `BeautifulSoup`, JSON-LD parsing), not via an official API — brittle
    to upstream HTML changes by nature.
- **`templates/`** — Jinja2 templates (`dashboard.html`, `login.html`,
  `settings.html`). Stale duplicates of these once sat at the repo root;
  they were never rendered (Flask loads from `templates/`) and were deleted
  during the redesign.
  - All three share one token set defined on `:root` — surfaces, a 6-step
    `--fs-*` type scale, semantic colours, and `--tap: 44px` for minimum
    touch targets. Add new UI with those tokens rather than literal values.
  - `dashboard.html` is ordered by urgency, deliberately mirroring the cache
    tiers in `app.py`: a "Right now" strip (live streams, download queue,
    array usage) sits above the fold, with library, discovery, requests and
    watch insights below it.
  - Degraded services render through the `service_error()` macro, which
    pairs `friendly_error` (human cause) with the raw exception behind a
    disclosure, passed through `redact_secrets` — SABnzbd and Tautulli put
    their API key in the request URL, so it appears in raw tracebacks.
- **`export-to-unraid.sh`** — a pre-existing standalone deploy script
  (build image locally → tarball → rsync + `docker load` over SSH) that
  predates the Forgejo pipeline below. Still present, not removed, but the
  Forgejo pipeline is now the primary deploy path going forward.
- **`nginx/`** — reference nginx location-block snippets for subdomain vs.
  subpath reverse-proxy setups; not actually consumed by the app at
  runtime (NPM handles proxying in practice), kept as documentation/config
  reference.

## Local development

```bash
pip install -r requirements.txt
python3 app.py
```

Runs on port 5000. Needs the various `*_API_KEY` and `*_HOST`/`ARR_HOST`
env vars (see `.env.example`) to reach real services — without them,
dashboard cards degrade to "error" status individually rather than
crashing the page.

## Deployment

**Target:** Unraid server, container path `/mnt/user/appdata/greendale`
(note the directory name differs from the container/repo name), built from
`Dockerfile`/`docker-compose.yml` in this repo. Container name
`arr-summary`, port `5055` (overridable via `HOST_PORT`) → container port
`5000`.

**Deploy mechanism: Forgejo push-to-deploy**, same pattern as the other
three projects on this box — see `card-grader`'s `CLAUDE.md` for the full
pipeline mechanics. Push to `main` on the `forgejo` remote
(`https://git.hippofam.com/ninja_hippo/arr-summary.git`) triggers
`.forgejo/workflows/deploy.yml`, which syncs into
`/mnt/user/appdata/greendale` (excluding `.git`, `.env`) and runs
`docker compose up -d --build`.

**Persistent state, never touched by deploys:** `.env` holds every API key
and `LOGIN_PASSWORD` — this project was already doing this correctly
before the Forgejo migration (compose file uses `${VAR}` substitution from
`.env`, no hardcoded secrets), unlike `n64-tracker` which needed fixing.
Runtime settings written by the Settings page (API-key overrides,
timezone, changed login password) live in `settings.json` at
`SETTINGS_FILE`, which the compose file points at `/data/settings.json`
on the `./data` bind mount — i.e. `/mnt/user/appdata/greendale/data`.
That mount is load-bearing: without it the file sits on the container
filesystem, and every `up -d --build` recreates the container and
silently discards it. `data/` is likewise excluded from the deploy
rsync, which runs `--delete` and would otherwise remove it for not
being in the repo.

A key saved through the Settings page overrides the corresponding
`.env` value at startup (see the block after the `*_API_KEY` reads in
`app.py`); `.env` remains the source of truth for anything never
overridden there. Both paths need a container restart to take effect,
since the keys are read once at import.