Add SQLite dashboard cache

app/actuators/cache_db.py

@@ -0,0 +1,98 @@
+from __future__ import annotations
+
+import json
+import sqlite3
+from datetime import datetime, timezone
+from pathlib import Path
+from threading import RLock
+
+from app.ha.models import HaEntitySummary
+
+
+class DashboardCache:
+    def __init__(self, path: str | Path) -> None:
+        self._path = Path(path).resolve()
+        self._path.parent.mkdir(parents=True, exist_ok=True)
+        self._lock = RLock()
+        self._init()
+
+    def load_entities_payload(self) -> dict[str, object]:
+        with self._lock, self._connect() as connection:
+            rows = connection.execute(
+                "select entity_id, payload from ha_entities order by entity_id"
+            ).fetchall()
+            updated_at = self._get_meta(connection, "ha_entities_updated_at")
+            groups_json = self._get_meta(connection, "discovery_groups") or "[]"
+        try:
+            groups = json.loads(groups_json)
+        except ValueError:
+            groups = []
+        return {
+            "updated_at": updated_at,
+            "discovery_groups": groups if isinstance(groups, list) else [],
+            "entities": [json.loads(row[1]) for row in rows],
+        }
+
+    def save_entities_payload(
+        self,
+        *,
+        entities: list[HaEntitySummary],
+        discovery_groups: list[dict[str, object]],
+    ) -> None:
+        now = datetime.now(timezone.utc).isoformat()
+        rows = [
+            (entity.entity_id, entity.model_dump_json())
+            for entity in entities
+        ]
+        with self._lock, self._connect() as connection:
+            connection.execute("delete from ha_entities")
+            connection.executemany(
+                "insert into ha_entities(entity_id, payload) values (?, ?)",
+                rows,
+            )
+            self._set_meta(connection, "ha_entities_updated_at", now)
+            self._set_meta(
+                connection,
+                "discovery_groups",
+                json.dumps(discovery_groups, ensure_ascii=True, sort_keys=True),
+            )
+
+    def _init(self) -> None:
+        with self._connect() as connection:
+            connection.execute(
+                """
+                create table if not exists ha_entities (
+                    entity_id text primary key,
+                    payload text not null
+                )
+                """
+            )
+            connection.execute(
+                """
+                create table if not exists cache_meta (
+                    key text primary key,
+                    value text
+                )
+                """
+            )
+
+    def _connect(self) -> sqlite3.Connection:
+        return sqlite3.connect(self._path, timeout=30)
+
+    @staticmethod
+    def _get_meta(connection: sqlite3.Connection, key: str) -> str | None:
+        row = connection.execute(
+            "select value from cache_meta where key = ?",
+            (key,),
+        ).fetchone()
+        return str(row[0]) if row is not None and row[0] is not None else None
+
+    @staticmethod
+    def _set_meta(connection: sqlite3.Connection, key: str, value: str) -> None:
+        connection.execute(
+            """
+            insert into cache_meta(key, value) values (?, ?)
+            on conflict(key) do update set value = excluded.value
+            """,
+            (key, value),
+        )

app/api/v1/actuators.py

@@ -8,6 +8,7 @@ from pathlib import Path
 from fastapi import APIRouter, Depends, HTTPException, Query, Request, status
 from pydantic import BaseModel, Field
 
+from app.actuators.cache_db import DashboardCache
 from app.actuators.lifecycle import ActuatorReconciliationService
 from app.actuators.models import ActuatorRecord, AnomalyEvent, ReconciliationState, SensorWeightGroup
 from app.actuators.models import JobQueueItem, JobQueueState, JobStatus, SafetyProfile
@@ -864,6 +865,11 @@ def _load_cached_entity_map(
 
 
 def _load_entity_cache_payload(request: Request) -> dict[str, object]:
+    cache = getattr(request.app.state, "dashboard_cache", None)
+    if isinstance(cache, DashboardCache):
+        payload = cache.load_entities_payload()
+        if payload.get("entities"):
+            return payload
     path = _entity_cache_path(request)
     if not path.exists():
         return {}
@@ -875,18 +881,18 @@ def _load_entity_cache_payload(request: Request) -> dict[str, object]:
 
 
 def _save_cached_entities(request: Request, entities: list[HaEntitySummary]) -> None:
+    group_payload = _discovery_group_payload(entities)
+    cache = getattr(request.app.state, "dashboard_cache", None)
+    if isinstance(cache, DashboardCache):
+        cache.save_entities_payload(
+            entities=entities,
+            discovery_groups=group_payload,
+        )
     path = _entity_cache_path(request)
     path.parent.mkdir(parents=True, exist_ok=True)
-    group_counts: dict[tuple[str, str], int] = {}
-    for entity in discover_entities(entities):
-        key = (entity.category, entity.role.value)
-        group_counts[key] = group_counts.get(key, 0) + 1
     payload = {
         "updated_at": datetime.now(timezone.utc).isoformat(),
-        "discovery_groups": [
-            {"category": category, "role": role, "count": count}
-            for (category, role), count in sorted(group_counts.items())
-        ],
+        "discovery_groups": group_payload,
         "entities": [entity.model_dump(mode="json") for entity in entities],
     }
     temporary = path.with_suffix(".json.tmp")
@@ -897,6 +903,17 @@ def _save_cached_entities(request: Request, entities: list[HaEntitySummary]) ->
     os.replace(temporary, path)
 
 
+def _discovery_group_payload(entities: list[HaEntitySummary]) -> list[dict[str, object]]:
+    group_counts: dict[tuple[str, str], int] = {}
+    for entity in discover_entities(entities):
+        key = (entity.category, entity.role.value)
+        group_counts[key] = group_counts.get(key, 0) + 1
+    return [
+        {"category": category, "role": role, "count": count}
+        for (category, role), count in sorted(group_counts.items())
+    ]
+
+
 def _deduplicate_actuator_ids(
     discovered: list[tuple[str, str]],
     entities: dict[str, HaEntitySummary],

app/config.py

@@ -22,6 +22,7 @@ class Settings:
     execution_cooldown_seconds: int = 900
     timezone: str = "Europe/Berlin"
     ha_timeout_seconds: int = 25
+    dashboard_cache_refresh_seconds: int = 3600
 
     @property
     def ha_configured(self) -> bool:
@@ -57,4 +58,7 @@ def load_settings() -> Settings:
         ),
         timezone=os.getenv("SILLYHOME_TIMEZONE", "Europe/Berlin"),
         ha_timeout_seconds=max(5, int(os.getenv("SILLYHOME_HA_TIMEOUT_SECONDS", "25"))),
+        dashboard_cache_refresh_seconds=max(
+            300, int(os.getenv("SILLYHOME_DASHBOARD_CACHE_REFRESH_SECONDS", "3600"))
+        ),
     )

app/main.py

@@ -12,6 +12,7 @@ from fastapi import FastAPI
 from fastapi.responses import FileResponse
 from fastapi.staticfiles import StaticFiles
 
+from app.actuators.cache_db import DashboardCache
 from app.actuators.lifecycle import ActuatorReconciliationService
 from app.actuators.store import ActuatorStore
 from app.api.v1.actuators import router as actuators_router
@@ -20,6 +21,7 @@ from app.behavior.engine import BehaviorEngine
 from app.config import load_settings
 from app.core.exception_handlers import register_exception_handlers
 from app.ha.client import HaClient, HaClientSettings
+from app.ha.discovery import discover_entities
 from app.ha.models import HaEntitySummary
 from app.ha.reader import HaReader
 from app.ml.registry.model_registry import ModelRegistry
@@ -47,8 +49,12 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
     reconcile_task: asyncio.Task[None] | None = None
     event_listener_task: asyncio.Task[None] | None = None
     fallback_task: asyncio.Task[None] | None = None
+    cache_refresh_task: asyncio.Task[None] | None = None
     app.state.registry = ModelRegistry(settings.model_store)
     app.state.actuator_store = ActuatorStore(settings.actuator_store)
+    app.state.dashboard_cache = DashboardCache(
+        Path(settings.actuator_store).resolve() / "dashboard_cache.sqlite3"
+    )
     if hasattr(app.state, "ha_reader"):
         del app.state.ha_reader
     if hasattr(app.state, "actuator_service"):
@@ -80,6 +86,7 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
         reconcile_task = asyncio.create_task(_periodic_reconciliation(app))
         event_listener_task = asyncio.create_task(_ha_event_listener(app, client))
         fallback_task = asyncio.create_task(_fallback_prediction(app))
+        cache_refresh_task = asyncio.create_task(_periodic_dashboard_cache_refresh(app))
     try:
         yield
     finally:
@@ -99,6 +106,10 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
             fallback_task.cancel()
             with suppress(asyncio.CancelledError):
                 await fallback_task
+        if cache_refresh_task is not None:
+            cache_refresh_task.cancel()
+            with suppress(asyncio.CancelledError):
+                await cache_refresh_task
         if client is not None:
             client.close()
 
@@ -106,7 +117,7 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
 app = FastAPI(
     title="SillyHome Next API",
     description="Lokales Smart-Home-Intelligenzsystem für Home Assistant.",
-    version="1.5.2",
+    version="1.5.3",
     lifespan=lifespan,
 )
 app.state.settings = load_settings()
@@ -160,6 +171,42 @@ async def _periodic_reconciliation(app: FastAPI) -> None:
             logger.exception("Geplante Reconciliation fehlgeschlagen; nächster Lauf versucht es erneut.")
 
 
+async def _periodic_dashboard_cache_refresh(app: FastAPI) -> None:
+    await asyncio.sleep(2)
+    while True:
+        await _refresh_dashboard_cache(app, trigger="scheduled")
+        await asyncio.sleep(app.state.settings.dashboard_cache_refresh_seconds)
+
+
+async def _refresh_dashboard_cache(app: FastAPI, *, trigger: str) -> None:
+    ha_reader = getattr(app.state, "ha_reader", None)
+    cache = getattr(app.state, "dashboard_cache", None)
+    if not isinstance(ha_reader, HaReader) or not isinstance(cache, DashboardCache):
+        return
+    try:
+        entities = await asyncio.to_thread(ha_reader.read_entities)
+        groups = _discovery_group_payload(list(entities))
+        await asyncio.to_thread(
+            cache.save_entities_payload,
+            entities=list(entities),
+            discovery_groups=groups,
+        )
+        logger.info("Dashboard-Cache aktualisiert (%s): %d Entities", trigger, len(entities))
+    except Exception as exc:
+        logger.warning("Dashboard-Cache konnte nicht aktualisiert werden (%s): %s", trigger, exc)
+
+
+def _discovery_group_payload(entities: list[HaEntitySummary]) -> list[dict[str, object]]:
+    group_counts: dict[tuple[str, str], int] = {}
+    for entity in discover_entities(entities):
+        key = (entity.category, entity.role.value)
+        group_counts[key] = group_counts.get(key, 0) + 1
+    return [
+        {"category": category, "role": role, "count": count}
+        for (category, role), count in sorted(group_counts.items())
+    ]
+
+
 async def _startup_reconciliation(app: FastAPI) -> None:
     delay_seconds = 5
     while True: