# CLAUDE.md This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository. ## Commands | Task | Command | |------|---------| | Install dependencies | `make init` (installs Python via uv + npm packages, loads platform fixtures) | | Development server | `make dev` (runs Django runserver + Tailwind CSS watcher) | | Production-like dev | `make dev-prod` (Caddy + Gunicorn/Uvicorn + Django-Q cluster) | | Run tests | `make test` (or `uv run --with pytest-django pytest`) | | Make migrations | `make makemigrations` | | Apply migrations | `make migrate` | | CSS (Tailwind) | `make css` | | Django shell | `make shell` | | Create superuser | `make createsuperuser` | | Format Python | `make format` (or `uv run ruff format`) | | Lint Python | `make lint` (or `uv run ruff check`) | | Auto-fix lint | `make lint-fix` (`ruff check --fix`) | | Lint + format check + tests | `make check` (CI-style aggregate) | | Sync uv.lock | `uv sync` (after editing pyproject.toml) | | Load platform fixtures | `make loadplatforms` | | Load sample data | `make loadsample` | | Dump games data | `make dumpgames` | ## Architecture A Django 6+ monolith (v1.7.0) with a single app (`games/`) for tracking video game purchases, play sessions, and statistics. Uses HTMX for interactivity with a pure-Python server-side component system, plus a Django Ninja REST API. ### Directory layout ``` games/ — Django app: models, views, templates, forms, signals, tasks, API, filters common/ — Shared utilities: time formatting, component system, criteria, layout, icons timetracker/ — Django project: settings, URL root, ASGI/WSGI tests/ — Pytest tests contrib/ — One-off scripts (exchange rate import) docs/ — Additional documentation ``` ### Models (in `games/models.py`) - **Game** — `name`, `platform` (FK), `status` (u/p/f/r/a), `mastered`, `playtime` (DurationField updated via signal), `year_released`, `sort_name`, `wikidata` - **Platform** — `name`, `group`, `icon` (slug, auto-generated from name) - **Purchase** — ownership type, prices, currency conversion (`converted_price`, `price_per_game` is a `GeneratedField`), links to Game via M2M. `num_purchases` counts linked games. DLC/SeasonPass/BattlePass must have a `related_purchase` - **Session** — `timestamp_start`/`timestamp_end`, `duration_manual`, `device` (FK), `note`, `emulated`. `duration_calculated` and `duration_total` are `GeneratedField`s (cannot be written directly) - **Device** — `name`, `type` (PC/Console/Handheld/Mobile/SBC/Unknown) - **PlayEvent** — marks when a game was started/finished (separate from Sessions), `days_to_finish` is a `GeneratedField` - **ExchangeRate** — cached FX rates per currency pair per year - **GameStatusChange** — audit log of status transitions, ordered by `-timestamp` - **FilterPreset** — saved filter configuration; `mode` (games/sessions/purchases/playevents), `find_filter`, `object_filter`, `ui_options` (all JSON). Follows Stash's SavedFilter pattern **Sentinel objects**: `get_sentinel_platform()` returns an "Unspecified" platform used when a Game has no platform. A similar sentinel Device ("Unknown") is created when a Session has no device. **GeneratedField constraint**: `duration_calculated`, `duration_total`, `price_per_game`, `days_to_finish` are computed by the database and cannot be written from application code. ### Key patterns **Layout system** (`common/layout.py`): Views call `render_page(request, content, title=...)` instead of Django's `render()`. This assembles a full HTML document via `Page()` — analogous to FastHTML's `fast_app()`. `Page()` handles the ``, navbar, toast container, JS includes, and FOUC-prevention script. The navbar shows today's playtime and last-7-days playtime from the `model_counts` context processor. **Component system** (`common/components/`): Pure-Python HTML builders, split into four submodules re-exported via `common/components/__init__.py`: - **`core.py`** — `Component(tag_name, attributes, children)`: the fundamental builder. `_render_element()` is `@lru_cache`-memoized (4096 entries, always active). Attribute values are always HTML-escaped; children are escaped unless they are `SafeText`. `randomid()` generates stable hash-based IDs. - **`primitives.py`** — Generic HTML: `A()`, `Button()` (with color/size/icon params), `ButtonGroup()`, `Div()`, `Span()`, `Label()`, `Input()`, `Icon()`, `Popover()`, `PopoverTruncated()`, `SearchField()`, `H1()`, `Modal()`, `SimpleTable()`, `TableRow()`, `TableTd()`, `TableHeader()`, `paginated_table_content()`, `AddForm()`, `Pill()`, `CsrfInput()`, `ModuleScript()` - **`domain.py`** — Domain-specific: `GameLink()`, `GameStatus()` (colored dot + label), `GameStatusSelector()` (Alpine.js PATCH dropdown), `SessionDeviceSelector()` (Alpine.js PATCH dropdown), `LinkedPurchase()`, `NameWithIcon()`, `PriceConverted()`, `PurchasePrice()` - **`filters.py`** — Filter UI: `FilterBar()`, `SessionFilterBar()`, `PurchaseFilterBar()` (built from `FilterSelect` widgets) - **`search_select.py`** — `SearchSelect()` (form combobox) + `FilterSelect()` (include/exclude filter combobox with pinned Any/None modifiers) + `SearchSelectOption`, all built on a shared `_combobox_shell`; wired by `games/static/js/search_select.js` **Filter system** (`games/filters.py` + `common/criteria.py`): Stash-inspired structured filtering. - `common/criteria.py` defines typed criterion classes: `StringCriterion`, `IntCriterion`, `FloatCriterion`, `DateCriterion`, `BoolCriterion`, `MultiCriterion`, `ChoiceCriterion`. Each has a `modifier` (`Modifier` enum: EQUALS, NOT_EQUALS, INCLUDES, EXCLUDES, GREATER_THAN, LESS_THAN, BETWEEN, IS_NULL, etc.) and a `to_q(field_name)` method. - `OperatorFilter` base class provides AND/OR/NOT sub-filter composition and JSON serialization/deserialization. - `games/filters.py` defines `GameFilter`, `SessionFilter`, `PurchaseFilter` (all `@dataclass` subclasses of `OperatorFilter`) and `FindFilter` (sort/pagination). Filters serialize to/from JSON and are passed in the `?filter=` query parameter. - `parse_game_filter()`, `parse_session_filter()`, `parse_purchase_filter()` helpers deserialize from a JSON string. - `FilterPreset` model stores named filter configurations that users can save and reload. **Views** (`games/views/`): Function-based views decorated with `@login_required`. Organized by domain entity: - `session.py`, `game.py`, `purchase.py`, `playevent.py`, `platform.py`, `device.py`, `statuschange.py` — CRUD for each entity - `general.py` — `stats()`, `stats_alltime()`, `index()`, `model_counts` context processor, `global_current_year` context processor, `use_custom_redirect` decorator (redirects to `request.session["return_path"]` if set) - `stats_data.py` — `compute_stats(year)` returns a `StatsData` TypedDict; pure computation, no HTTP - `stats_content.py` — renders stats page content from a `StatsData` dict - `filter_presets.py` — `list_presets`, `save_preset`, `delete_preset`, `load_preset` - `auth.py` — custom `LoginView` subclassing Django's auth view, renders login page via `render_page()` **Signals** (`games/signals.py`): - `pre_save` on Purchase: snapshots old price/currency for change detection - `post_save` on Purchase: sets `needs_price_update` if price/currency changed - `m2m_changed` on Purchase.games: updates `num_purchases` count - `pre_delete` on Game: decrements `num_purchases` on related Purchases (deletes Purchase if count reaches 0) - `post_save/post_delete` on Session: recalculates `Game.playtime` from session aggregate - `pre_save` on Game: creates `GameStatusChange` audit records when `status` changes **Background tasks**: django-q2 cluster runs `games.tasks.convert_prices()` on a schedule to fetch exchange rates from `cdn.jsdelivr.net/npm/@fawazahmed0/currency-api` and convert purchase prices to CZK. **HTMX toast middleware** (`games/htmx_middleware.py`): Converts Django messages into `HX-Trigger` headers with `show-toast` event. Skips if `HX-Redirect` is present. Toast rendering is handled client-side by Alpine.js (`games/static/js/toast.js`). **REST API** (`games/api.py`): Django Ninja with routers mounted at `/api/`: - `GET /api/games/search` — search games for autocomplete - `PATCH /api/games/{id}/status` — update game status - `GET/POST /api/playevent/` — list/create play events - `GET/PATCH/DELETE /api/playevent/{id}` — get/update/delete play event - `PATCH /api/session/{id}/device` — update session device ### Templates Only a small number of HTML templates remain (platform icon snippets and partials). The bulk of the UI is built via Python components. Template files: - `games/templates/icons/.html` — SVG icon snippets (loaded by `common/icons.py` via `get_icon()`) - `games/templates/` — minimal partials for HTMX responses where needed ### Frontend stack - **HTMX** (`games/static/js/htmx.min.js`) — partial page updates - **Alpine.js** (CDN) — reactive dropdowns (`GameStatusSelector`, `SessionDeviceSelector`), toast store - **Flowbite** (CDN) — navbar collapse, dropdown toggles - **Tailwind CSS** — utility classes, compiled from `common/input.css` → `games/static/base.css` - **Custom JS** in `games/static/js/`: - `toast.js` — Alpine.js toast store (listens for `show-toast` HTMX event) - `search_select.js` — SearchSelect/FilterSelect widgets (search-as-you-type, pills, include/exclude filter mode) - `utils.js` — shared helpers (e.g., `fetchWithHtmxTriggers`) ### Deployment Docker-based: multi-stage Dockerfile (uv builder → slim runtime), Caddy as reverse proxy on port 8000, Gunicorn with UvicornWorker (ASGI), Supervisor to manage Caddy + Gunicorn + django-q2. `make dev-prod` mimics production locally. CI/CD via GitHub Actions (`.github/workflows/build-docker.yml`): builds Docker image; Drone CI (`.drone.yml`) also present for deployments via Portainer webhook. ### Database SQLite with WAL journal mode. Connection timeout 20s. The `DATA_DIR` env var controls the database file location. Migrations live in `games/migrations/`. There are `GeneratedField`s on the models — these are computed by the database engine and cannot be written from application code. ### Configuration - `DEBUG` is `True` unless `PROD` env var is set - `TIME_ZONE` defaults to `Europe/Prague` in debug, otherwise reads `TZ` env var (default `UTC`) - Django Admin, Debug Toolbar, and `django_extensions` are only available in `DEBUG` mode - `CSRF_TRUSTED_ORIGINS` is parsed from a comma-separated env var - `DATA_DIR` env var sets the SQLite database location (defaults to `BASE_DIR`) - django-q2 cluster: 1 worker, 60s timeout, 120s retry, ORM broker ### Testing Tests live in `tests/`. Run with `make test` or `uv run --with pytest-django pytest`. Key test files: - `test_components.py` — component rendering - `test_filter_bars.py`, `test_filter_helpers.py`, `test_filters.py` — filter system - `test_paths_return_200.py` — smoke test all list/view URLs - `test_rendered_pages.py` — HTML output of pages - `test_signals.py` — signal side-effects (playtime recalc, status change audit, etc.) - `test_stats.py` — stats computation - `test_streak.py`, `test_time.py`, `test_session_formatting.py` — utilities - `test_middleware_integration.py`, `test_toast_middleware.py` — HTMX middleware - `test_price_update.py` — currency conversion signals - `test_search_select.py` — SearchSelect component Pytest settings are in `pyproject.toml` under `[tool.pytest.ini_options]` (`DJANGO_SETTINGS_MODULE = "timetracker.settings"`). ## Conventions for AI assistants - **Never write to `GeneratedField`s** (`duration_calculated`, `duration_total`, `price_per_game`, `days_to_finish`). They are computed by the database. - **Use `render_page()` not `render()`** for all full-page HTTP responses. Import from `common.layout`. - **Build UI with Python components** from `common.components`, not raw HTML strings or Django templates. `SafeText` children pass through unescaped; plain strings are auto-escaped. - **Filter views** accept `?filter=` (structured) and fall back to `?search_string=` (free-text). New filter criteria go in `games/filters.py`; new criterion types go in `common/criteria.py`. - **Signals handle side-effects** — do not manually recalculate `Game.playtime` or `Purchase.num_purchases`; the signals in `games/signals.py` do this on save/delete. - **Button colors**: `blue` (primary action), `red` (destructive), `gray` (secondary), `green` (positive). Icon buttons use `icon=True`. - **Inline Alpine.js** is used for client-side reactivity in domain components (`GameStatusSelector`, `SessionDeviceSelector`). The pattern is `x-data="{...}"` with `fetchWithHtmxTriggers()` for PATCH API calls. - **Platform icons** are SVG snippets in `games/templates/icons/.html`. Add new ones there and reference them by slug in `Platform.icon`.