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Add skin system: user-installable visual overlays for sports scoreboards (#419)
* Add skin system: user-installable visual overlays for sports scoreboards Skins restyle a scoreboard's live/recent/upcoming rendering while the host plugin keeps doing data fetching, scheduling, caching, live priority, and vegas mode — the anti-fork alternative for users who only want a different layout. - src/skin_system/: ScoreboardSkin API, SkinContext (canvas + adaptive layout + logo/font helpers), discovery/loading runtime with API major version gating and per-skin module namespacing - src/base_classes/sports.py: _render_game() seam at the three _draw_scorebug_layout call sites; skin-first with built-in fallback, 3-strikes session disable, slow-render warning; per-mode skin config - scripts/validate_skin.py: headless multi-mode/multi-size validator with bundled per-sport fixtures (no hardware or network needed) - skins/example-classic-baseball/: working reference skin - Web UI: served-schema Visual Skin dropdown (validation never enum-restricted, so uninstalled skins can't invalidate configs) and GET /api/v3/skins - Store: registry entries with type "skin" install to skins/ - docs/SKIN_SYSTEM.md (architecture), docs/CREATING_SKINS.md (author guide incl. Claude Code prompt), view-model contract locked by tests Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LrCusPasy1qeUN5anK3aA1 * Address review feedback on skin system - skin_runtime: cache the entry module so the 2nd/3rd load of the same skin (live/recent/upcoming hosts) doesn't re-execute it with unbound sibling aliases; rebind cached sibling modules to their bare names around entry import and restore prior bindings after; include per- manifest mtimes in the discovery cache fingerprint so in-place skin updates are picked up - sports.py: count render_skin_card exceptions toward the 3-strike session disable - store_manager: validate skin ids (pattern + resolved-path containment in skins/), reject registry/manifest id mismatches, and stage+validate downloads in a temp sibling before replacing an existing skin - schema_manager: leave the schema untouched when the configured skin value is a per-mode mapping (a string dropdown could overwrite it) - validate_skin.py: reject non-positive sizes and non-object --options at parse time; support --output-dir outside the repo; type annotations - example skin: validate accent_color once at load with logged fallback - fixtures: pregame 0-0 scores in football/hockey upcoming fixtures - api /skins: rely on the self-invalidating discovery cache instead of force_refresh - docs: valid JSON manifest example, load_logo caching semantics spelled out, language ids on fenced blocks - tests: view-model contract test now exercises the real extractor; regression test for repeated same-skin loads with sibling modules Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LrCusPasy1qeUN5anK3aA1 --------- Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
Chuck
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"""
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Skin runtime: discovery, validation, loading, and context building.
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Deliberately generic — this module knows nothing about sports beyond
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passing a `sport` label through; the sports flavor lives in skin_base
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(ScoreboardSkin) and in the hosts that call build_context.
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Every failure path here logs and returns None: a broken or missing skin
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must never take down the plugin that references it — the host falls
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back to its built-in renderer.
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"""
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import importlib.util
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import json
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import sys
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import threading
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from pathlib import Path
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from typing import Any, Dict, Optional, Tuple
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from PIL import Image, ImageDraw
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from src.adaptive_layout import LayoutContext
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from src.logging_config import get_logger
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from src.skin_system.skin_base import (
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SKIN_API_VERSION,
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ScoreboardSkin,
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SkinContext,
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)
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logger = get_logger(__name__)
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_REQUIRED_MANIFEST_FIELDS = ("id", "name", "version", "skin_api_version", "class_name")
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_DEFAULT_ENTRY_POINT = "skin.py"
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_lock = threading.RLock()
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# skins_dir -> (fingerprint, {skin_id: manifest+path})
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_discovery_cache: Dict[str, Tuple[Tuple, Dict[str, Dict[str, Any]]]] = {}
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_shared_layout_font_manager: Optional[Any] = None
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def _get_font_manager() -> Any:
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"""Shared FontManager for skin LayoutContexts. SportsCore hosts don't
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carry a plugin_manager, so skins share one module-level FontManager —
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the same shape as base_plugin._fallback_font_manager, constructed
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directly so rendering never has to import the whole plugin system."""
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global _shared_layout_font_manager
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if _shared_layout_font_manager is None:
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from src.font_manager import FontManager
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_shared_layout_font_manager = FontManager({})
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return _shared_layout_font_manager
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def get_skins_directory() -> Path:
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"""Central skins directory: <project_root>/skins. Lives outside the
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plugin directories on purpose — plugin reinstall/update deletes the
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whole plugin directory, and a skin must survive that."""
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return Path(__file__).resolve().parents[2] / "skins"
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def _major(version: str) -> Optional[int]:
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try:
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return int(str(version).split(".")[0])
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except (ValueError, AttributeError, IndexError):
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return None
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def _read_manifest(skin_dir: Path) -> Optional[Dict[str, Any]]:
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manifest_path = skin_dir / "skin.json"
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if not manifest_path.is_file():
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return None
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try:
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with open(manifest_path, "r", encoding="utf-8") as f:
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manifest = json.load(f)
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except (OSError, json.JSONDecodeError) as e:
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logger.error("Skin manifest %s is unreadable: %s", manifest_path, e)
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return None
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missing = [k for k in _REQUIRED_MANIFEST_FIELDS if not manifest.get(k)]
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if missing:
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logger.error("Skin manifest %s missing required fields: %s",
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manifest_path, ", ".join(missing))
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return None
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if manifest["id"] != skin_dir.name:
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logger.warning("Skin manifest id %r does not match directory name %r",
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manifest["id"], skin_dir.name)
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manifest["_skin_dir"] = str(skin_dir)
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return manifest
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def _discovery_fingerprint(skins_dir: Path) -> Optional[Tuple]:
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"""Cache key for a skins directory: its mtime plus every skin.json's
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(path, mtime). The directory mtime alone misses in-place manifest edits
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(a skin updated without adding/removing entries)."""
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try:
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parts = [skins_dir.stat().st_mtime]
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for manifest_path in sorted(skins_dir.glob("*/skin.json")):
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parts.append((str(manifest_path), manifest_path.stat().st_mtime))
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return tuple(parts)
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except OSError:
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return None
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def discover_skins(skins_dir: Optional[Path] = None,
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force_refresh: bool = False) -> Dict[str, Dict[str, Any]]:
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"""Return {skin_id: manifest} for every valid skin package installed.
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Cached per directory and invalidated when the directory or any
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skin.json changes; pass force_refresh to bypass.
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"""
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skins_dir = Path(skins_dir) if skins_dir else get_skins_directory()
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cache_key = str(skins_dir)
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fingerprint = _discovery_fingerprint(skins_dir)
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if fingerprint is None:
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return {}
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with _lock:
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cached = _discovery_cache.get(cache_key)
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if cached and not force_refresh and cached[0] == fingerprint:
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return dict(cached[1])
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skins: Dict[str, Dict[str, Any]] = {}
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for entry in sorted(skins_dir.iterdir()):
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if not entry.is_dir() or entry.name.startswith((".", "_")):
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continue
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manifest = _read_manifest(entry)
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if manifest:
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skins[manifest["id"]] = manifest
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_discovery_cache[cache_key] = (fingerprint, skins)
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return dict(skins)
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def skin_targets(manifest: Dict[str, Any]) -> Tuple[list, list]:
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"""(sports, sport_keys) a skin declares it supports."""
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targets = manifest.get("targets") or {}
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return (list(targets.get("sports") or []),
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list(targets.get("sport_keys") or []))
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def skin_matches_target(manifest: Dict[str, Any], sport: Optional[str],
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sport_key: Optional[str]) -> bool:
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"""True when the skin declares support for this sport family or exact
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sport key. A skin with no targets at all matches everything."""
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sports, sport_keys = skin_targets(manifest)
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if not sports and not sport_keys:
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return True
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if sport and sport in sports:
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return True
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if sport_key and sport_key in sport_keys:
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return True
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return False
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def skins_for_plugin(plugin_id: str,
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skins: Optional[Dict[str, Dict[str, Any]]] = None) -> Dict[str, Dict[str, Any]]:
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"""Installed skins that plausibly apply to a plugin, for UI dropdowns.
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A skin matches when the plugin id is listed in targets.plugins, or any
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declared sport / sport_key appears as a token of the plugin id (so a
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skin targeting sports=["baseball"] matches "baseball-scoreboard", and
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sport_keys=["milb"] matches "milb-scoreboard")."""
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if skins is None:
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skins = discover_skins()
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tokens = set(str(plugin_id).lower().replace("-", "_").split("_"))
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matched = {}
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for skin_id, manifest in skins.items():
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targets = manifest.get("targets") or {}
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if plugin_id in (targets.get("plugins") or []):
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matched[skin_id] = manifest
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continue
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sports, sport_keys = skin_targets(manifest)
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if any(str(t).lower() in tokens for t in sports + sport_keys):
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matched[skin_id] = manifest
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return matched
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def _load_skin_module(skin_id: str, skin_dir: Path, entry_point: str) -> Optional[Any]:
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"""Import the skin's entry module under a namespaced sys.modules key,
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namespacing its sibling .py files the same way — the collision-
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avoidance scheme plugins use (plugin_loader._namespace_plugin_modules),
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so two skins can both ship a helpers.py.
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The entry module is cached: the live/recent/upcoming hosts all load
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the same skin, and only the first load executes any code. (A skin
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whose *code* changed on disk needs a service restart to take effect —
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Python modules can't be safely hot-swapped.)
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"""
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entry_path = skin_dir / entry_point
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if not entry_path.is_file():
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logger.error("Skin '%s' entry point not found: %s", skin_id, entry_path)
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return None
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module_name = f"_skin_{skin_id}_{Path(entry_point).stem}"
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with _lock:
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cached_entry = sys.modules.get(module_name)
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if cached_entry is not None:
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return cached_entry
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# Import siblings under their namespaced alias, and *bind* the bare
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# name (cached or fresh) so `import helpers` inside the entry module
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# resolves to this skin's copy. The bare bindings are transient —
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# restored below so another skin's identically-named sibling can't
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# be shadowed by ours.
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replaced_bare: Dict[str, Any] = {}
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try:
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for sibling in skin_dir.glob("*.py"):
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if sibling.name == entry_point:
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continue
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alias = f"_skin_{skin_id}_{sibling.stem}"
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module = sys.modules.get(alias)
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if module is None:
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spec = importlib.util.spec_from_file_location(alias, sibling)
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if not spec or not spec.loader:
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continue
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module = importlib.util.module_from_spec(spec)
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sys.modules[alias] = module
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replaced_bare.setdefault(sibling.stem, sys.modules.get(sibling.stem))
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sys.modules[sibling.stem] = module
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try:
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spec.loader.exec_module(module)
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except Exception as e:
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logger.error("Skin '%s' sibling module %s failed to import: %s",
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skin_id, sibling.name, e, exc_info=True)
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sys.modules.pop(alias, None)
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return None
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else:
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replaced_bare.setdefault(sibling.stem, sys.modules.get(sibling.stem))
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sys.modules[sibling.stem] = module
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try:
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spec = importlib.util.spec_from_file_location(module_name, entry_path)
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if not spec or not spec.loader:
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logger.error("Skin '%s': could not create import spec for %s",
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skin_id, entry_path)
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return None
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module = importlib.util.module_from_spec(spec)
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sys.modules[module_name] = module
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spec.loader.exec_module(module)
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return module
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except Exception as e:
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sys.modules.pop(module_name, None)
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logger.error("Skin '%s' failed to import: %s", skin_id, e, exc_info=True)
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return None
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finally:
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for bare_name, previous in replaced_bare.items():
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if previous is None:
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sys.modules.pop(bare_name, None)
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else:
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sys.modules[bare_name] = previous
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def load_skin(skin_id: str, sport: Optional[str] = None,
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sport_key: Optional[str] = None,
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options: Optional[Dict[str, Any]] = None,
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skins_dir: Optional[Path] = None) -> Optional[ScoreboardSkin]:
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"""Load and instantiate a skin. Returns None (after logging why) on
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any failure — callers treat None as 'use the built-in renderer'."""
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skins = discover_skins(skins_dir)
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manifest = skins.get(skin_id)
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if manifest is None:
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logger.warning("Skin '%s' is configured but not installed under %s; "
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"using built-in renderer",
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skin_id, skins_dir or get_skins_directory())
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return None
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manifest_major = _major(manifest.get("skin_api_version"))
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api_major = _major(SKIN_API_VERSION)
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if manifest_major != api_major:
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logger.error("Skin '%s' targets skin API %s but this LEDMatrix "
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"provides %s — the skin needs an update; using "
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"built-in renderer",
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skin_id, manifest.get("skin_api_version"), SKIN_API_VERSION)
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return None
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if not skin_matches_target(manifest, sport, sport_key):
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# Soft: the user explicitly configured it, so warn but load anyway
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# (a baseball skin may render an acceptable generic scoreboard).
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logger.warning("Skin '%s' does not declare support for sport=%r / "
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"sport_key=%r; loading anyway", skin_id, sport, sport_key)
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skin_dir = Path(manifest["_skin_dir"])
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module = _load_skin_module(skin_id, skin_dir,
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manifest.get("entry_point", _DEFAULT_ENTRY_POINT))
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if module is None:
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return None
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class_name = manifest["class_name"]
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skin_class = getattr(module, class_name, None)
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if skin_class is None or not isinstance(skin_class, type) or \
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not issubclass(skin_class, ScoreboardSkin):
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logger.error("Skin '%s': %s is missing or not a ScoreboardSkin subclass",
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skin_id, class_name)
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return None
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try:
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return skin_class(manifest, options or {})
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except Exception as e:
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logger.error("Skin '%s' failed to instantiate: %s", skin_id, e, exc_info=True)
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return None
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def build_context(host: Any, game: Dict[str, Any],
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size: Optional[Tuple[int, int]] = None) -> SkinContext:
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"""Build a SkinContext for one render call.
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`host` is a SportsCore-style object: display_manager, fonts, logger,
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sport, skin_options, _load_and_resize_logo, _draw_text_with_outline.
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`size` overrides the canvas size (vegas cards); default is the
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current display size read live from the display manager.
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"""
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if size is not None:
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width, height = int(size[0]), int(size[1])
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else:
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dm = host.display_manager
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width = getattr(dm, "width", None) or dm.matrix.width
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height = getattr(dm, "height", None) or dm.matrix.height
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canvas = Image.new("RGB", (width, height), (0, 0, 0))
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draw = ImageDraw.Draw(canvas)
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layout = LayoutContext(width, height, _get_font_manager())
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def load_logo(side: str) -> Optional[Image.Image]:
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if side not in ("home", "away"):
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return None
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try:
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logo_path = game.get(f"{side}_logo_path")
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if logo_path is not None and not isinstance(logo_path, Path):
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logo_path = Path(logo_path)
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return host._load_and_resize_logo(
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game.get(f"{side}_id"), game.get(f"{side}_abbr"),
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logo_path, game.get(f"{side}_logo_url"))
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except Exception as e:
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host.logger.warning("Skin logo load failed for %s: %s", side, e)
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return None
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def draw_text_outlined(text, position, font, fill=(255, 255, 255),
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outline_color=(0, 0, 0)):
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host._draw_text_with_outline(draw, text, position, font,
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fill=fill, outline_color=outline_color)
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return SkinContext(
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canvas=canvas,
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draw=draw,
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layout=layout,
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width=width,
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height=height,
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fonts=dict(host.fonts),
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options=dict(getattr(host, "skin_options", {}) or {}),
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logger=host.logger,
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sport=getattr(host, "sport", None),
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load_logo=load_logo,
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draw_text_outlined=draw_text_outlined,
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)
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