add safe home assistant error handling

app/__init__.py

@@ -0,0 +1 @@
+"""SillyHome Next application package."""

app/api/__init__.py

@@ -0,0 +1 @@
+"""API package."""

app/api/v1/__init__.py

@@ -0,0 +1 @@
+"""Version 1 API package."""

app/api/v1/entities.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from fastapi import APIRouter, Depends
+
+from app.dependencies import get_ha_reader
+from app.ha.models import HaEntitySummary
+from app.ha.reader import HaReader
+
+router = APIRouter(prefix="/v1", tags=["entities"])
+
+
+@router.get(
+    "/entities",
+    summary="Home-Assistant-Entities auflisten",
+    description="Gibt eine kompakte Zusammenfassung aller erreichbaren HA-Entitäten zurück.",
+    response_model=list[HaEntitySummary],
+)
+def list_entities(reader: HaReader = Depends(get_ha_reader)) -> Sequence[HaEntitySummary]:
+    return reader.read_entities()

app/config.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+import os
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class Settings:
+    ha_url: str | None = None
+    ha_token: str | None = None
+
+    @property
+    def ha_configured(self) -> bool:
+        return bool(self.ha_url and self.ha_token)
+
+
+def load_settings() -> Settings:
+    return Settings(
+        ha_url=os.getenv("SILLYHOME_HA_URL") or os.getenv("HA_URL"),
+        ha_token=os.getenv("SILLYHOME_HA_TOKEN") or os.getenv("HA_TOKEN"),
+    )

app/core/__init__.py

@@ -0,0 +1 @@
+"""Core application helpers."""

app/core/exception_handlers.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from fastapi import FastAPI, Request, status
+from fastapi.responses import JSONResponse
+
+from app.ha.exceptions import HaAuthError, HaClientError, HaHttpError, HaTimeoutError
+
+
+def register_exception_handlers(app: FastAPI) -> None:
+    @app.exception_handler(HaClientError)
+    async def handle_ha_client_error(_: Request, exc: HaClientError) -> JSONResponse:
+        return JSONResponse(
+            status_code=_status_code_for_ha_error(exc),
+            content={"detail": exc.public_detail},
+        )
+
+
+def _status_code_for_ha_error(exc: HaClientError) -> int:
+    if isinstance(exc, HaTimeoutError):
+        return status.HTTP_504_GATEWAY_TIMEOUT
+    if isinstance(exc, (HaAuthError, HaHttpError)):
+        return status.HTTP_502_BAD_GATEWAY
+    return status.HTTP_502_BAD_GATEWAY

app/dependencies.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from fastapi import HTTPException, Request, status
+
+from app.ha.reader import HaReader
+
+
+def get_ha_reader(request: Request) -> HaReader:
+    reader = getattr(request.app.state, "ha_reader", None)
+    if not isinstance(reader, HaReader):
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="Home Assistant is not configured.",
+        )
+    return reader

app/ha/__init__.py

@@ -0,0 +1 @@
+# sillyhome-next.ha

app/ha/client.py

@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+import logging
+from dataclasses import dataclass
+from typing import Any
+
+import requests
+
+from app.ha.exceptions import (
+    HaAuthError,
+    HaHttpError,
+    HaTimeoutError,
+    HaUnexpectedPayloadError,
+)
+
+logger = logging.getLogger(__name__)
+
+
+@dataclass(frozen=True)
+class HaClientSettings:
+    url: str
+    token: str
+    timeout_seconds: int = 10
+
+
+class HaClient:
+    def __init__(self, settings: HaClientSettings) -> None:
+        self._settings = settings
+        self._session = requests.Session()
+        self._session.headers.update({
+            "Authorization": f"Bearer {settings.token}",
+            "Content-Type": "application/json",
+        })
+
+    def list_entities(self) -> list[dict[str, Any]]:
+        try:
+            response = self._session.get(
+                f"{self._settings.url}/api/states",
+                timeout=self._settings.timeout_seconds,
+            )
+        except requests.Timeout as exc:
+            raise HaTimeoutError("Home Assistant request timed out.") from exc
+        except requests.RequestException as exc:
+            raise HaHttpError(status_code=502, message="Home Assistant request failed.") from exc
+
+        if response.status_code in {401, 403}:
+            raise HaAuthError(
+                status_code=response.status_code,
+                message="Home Assistant authentication failed.",
+            )
+
+        try:
+            response.raise_for_status()
+        except requests.HTTPError as exc:
+            raise HaHttpError(
+                status_code=response.status_code,
+                message="Home Assistant returned an HTTP error.",
+            ) from exc
+
+        try:
+            payload = response.json()
+        except ValueError as exc:
+            raise HaUnexpectedPayloadError("Home Assistant returned invalid JSON.") from exc
+
+        if not isinstance(payload, list):
+            raise HaUnexpectedPayloadError("Home Assistant states response must be a list.")
+        return payload

app/ha/exceptions.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+
+class HaClientError(Exception):
+    """Base class for Home Assistant integration failures."""
+
+    public_detail = "Home Assistant is currently unavailable."
+
+
+class HaTimeoutError(HaClientError):
+    public_detail = "Home Assistant request timed out."
+
+
+class HaHttpError(HaClientError):
+    public_detail = "Home Assistant returned an error."
+
+    def __init__(self, status_code: int, message: str | None = None) -> None:
+        super().__init__(message or self.public_detail)
+        self.status_code = status_code
+
+
+class HaAuthError(HaHttpError):
+    public_detail = "Home Assistant authentication failed."
+
+
+class HaUnexpectedPayloadError(HaClientError):
+    public_detail = "Home Assistant returned an unexpected response."

app/ha/models.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from pydantic import BaseModel
+
+
+class HaState(BaseModel):
+    entity_id: str
+    state: str
+    attributes: dict[str, object] | None = None
+    last_changed: str | None = None
+    last_updated: str | None = None
+
+
+class HaEntitySummary(BaseModel):
+    entity_id: str
+    domain: str
+    state_class: str | None = None
+    device_class: str | None = None
+    unit_of_measurement: str | None = None

app/ha/reader.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
+from typing import Any
+
+from app.ha.client import HaClient
+from app.ha.models import HaEntitySummary
+
+
+class HaReader:
+    def __init__(self, client: HaClient) -> None:
+        self._client = client
+
+    def read_entities(self) -> Sequence[HaEntitySummary]:
+        entities = self._client.list_entities()
+        summaries: list[HaEntitySummary] = []
+        for item in entities:
+            entity_id = item.get("entity_id", "")
+            if "." not in entity_id:
+                continue
+            domain = entity_id.split(".", 1)[0]
+            raw_attributes = item.get("attributes") or {}
+            attributes: dict[str, Any] = raw_attributes if isinstance(raw_attributes, dict) else {}
+            summaries.append(
+                HaEntitySummary(
+                    entity_id=entity_id,
+                    domain=domain,
+                    state_class=_optional_str(attributes.get("state_class")),
+                    device_class=_optional_str(attributes.get("device_class")),
+                    unit_of_measurement=_optional_str(attributes.get("unit_of_measurement")),
+                )
+            )
+        return summaries
+
+
+def _optional_str(value: object) -> str | None:
+    if value is None or value == "":
+        return None
+    return str(value)

app/main.py

@@ -1,11 +1,41 @@
+from collections.abc import AsyncIterator
+from contextlib import asynccontextmanager
+
 from fastapi import FastAPI
 
+from app.api.v1.entities import router as entities_router
+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.reader import HaReader
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI) -> AsyncIterator[None]:
+    settings = load_settings()
+    app.state.settings = settings
+    if settings.ha_configured:
+        client = HaClient(
+            settings=HaClientSettings(
+                url=settings.ha_url or "",
+                token=settings.ha_token or "",
+            )
+        )
+        app.state.ha_reader = HaReader(client=client)
+    yield
+
+
 app = FastAPI(
     title="SillyHome Next API",
     description="Lokales Smart-Home-Intelligenzsystem für Home Assistant.",
     version="0.1.0",
+    lifespan=lifespan,
 )
 
+register_exception_handlers(app)
+
+app.include_router(entities_router)
+
 
 @app.get("/health")
 def health() -> dict[str, str]:

app/rules/__init__.py

@@ -0,0 +1 @@
+# sillyhome-next.rules

app/rules/heating.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from app.ha.models import HaEntitySummary
+from app.rules.recommender import Rule
+
+
+class HeatingRule(Rule):
+    def matches(self, entities: Sequence[HaEntitySummary]) -> bool:
+        domains = {item.domain for item in entities}
+        return "climate" in domains or "sensor" in domains
+
+    def recommendation(self, entities: Sequence[HaEntitySummary]) -> str:
+        return "Prüfe Heizungsregelung: Aktiviere energiesparenden Modus bei Abwesenheit."

app/rules/recommender.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from app.ha.models import HaEntitySummary
+
+
+class Rule:
+    def matches(self, entities: Sequence[HaEntitySummary]) -> bool:
+        raise NotImplementedError
+
+    def recommendation(self, entities: Sequence[HaEntitySummary]) -> str:
+        raise NotImplementedError
+
+
+class Recommender:
+    def __init__(self, rules: Sequence[Rule]) -> None:
+        self._rules = rules
+
+    def run(self, entities: Sequence[HaEntitySummary]) -> list[str]:
+        results: list[str] = []
+        for rule in self._rules:
+            if rule.matches(entities):
+                results.append(rule.recommendation(entities))
+        return results

pyproject.toml

@@ -7,10 +7,12 @@ dependencies = [
   "fastapi>=0.110.0",
   "uvicorn[standard]>=0.29.0",
   "pydantic>=2.6.0",
+  "requests>=2.31.0",
 ]
 
 [project.optional-dependencies]
 dev = [
+  "httpx2>=2.3.0",
   "pytest>=8.0.0",
   "ruff>=0.4.0",
   "mypy>=1.9.0",

scripts/gitea_setup.py

@@ -1,5 +1,4 @@
 import requests
-import json
 from pathlib import Path
 
 p = Path('/root/.openclaw/secrets/gitea.env')

tests/api/test_entities.py

@@ -0,0 +1,63 @@
+from collections.abc import Sequence
+
+from fastapi.testclient import TestClient
+
+from app.ha.exceptions import HaTimeoutError
+from app.ha.models import HaEntitySummary
+from app.ha.reader import HaReader
+from app.main import app
+
+
+class FakeHaReader(HaReader):
+    def __init__(self) -> None:
+        pass
+
+    def read_entities(self) -> Sequence[HaEntitySummary]:
+        return [HaEntitySummary(entity_id="sensor.temperature", domain="sensor")]
+
+
+class TimeoutHaReader(HaReader):
+    def __init__(self) -> None:
+        pass
+
+    def read_entities(self) -> Sequence[HaEntitySummary]:
+        raise HaTimeoutError("contains internal details that must not leak")
+
+
+def test_openapi_docs_are_available() -> None:
+    with TestClient(app) as client:
+        response = client.get("/docs")
+    assert response.status_code == 200
+    assert "SillyHome Next API" in response.text
+
+
+def test_entities_returns_reader_data() -> None:
+    with TestClient(app) as client:
+        app.state.ha_reader = FakeHaReader()
+        response = client.get("/v1/entities")
+    assert response.status_code == 200
+    assert response.json() == [
+        {
+            "entity_id": "sensor.temperature",
+            "domain": "sensor",
+            "state_class": None,
+            "device_class": None,
+            "unit_of_measurement": None,
+        }
+    ]
+
+
+def test_entities_returns_503_without_home_assistant_config() -> None:
+    with TestClient(app) as client:
+        if hasattr(app.state, "ha_reader"):
+            delattr(app.state, "ha_reader")
+        response = client.get("/v1/entities")
+    assert response.status_code == 503
+
+
+def test_entities_maps_ha_errors_without_leaking_details() -> None:
+    with TestClient(app) as client:
+        app.state.ha_reader = TimeoutHaReader()
+        response = client.get("/v1/entities")
+    assert response.status_code == 504
+    assert response.json() == {"detail": "Home Assistant request timed out."}

tests/ha/test_ha_client.py

@@ -0,0 +1,79 @@
+from __future__ import annotations
+
+from unittest.mock import Mock
+
+import pytest
+import requests
+
+from app.ha.client import HaClient, HaClientSettings
+from app.ha.exceptions import (
+    HaAuthError,
+    HaHttpError,
+    HaTimeoutError,
+    HaUnexpectedPayloadError,
+)
+
+
+def _client_with_response(response: Mock) -> HaClient:
+    client = HaClient(HaClientSettings(url="http://ha.local", token="secret-token"))
+    client._session.get = Mock(return_value=response)  # type: ignore[method-assign]
+    return client
+
+
+def _response(status_code: int = 200, payload: object | None = None) -> Mock:
+    response = Mock()
+    response.status_code = status_code
+    response.json.return_value = [] if payload is None else payload
+    if status_code >= 400:
+        response.raise_for_status.side_effect = requests.HTTPError("upstream failed")
+    return response
+
+
+def test_list_entities_returns_home_assistant_payload() -> None:
+    payload = [{"entity_id": "sensor.temperature", "state": "21"}]
+    client = _client_with_response(_response(payload=payload))
+
+    assert client.list_entities() == payload
+
+
+def test_list_entities_maps_timeout() -> None:
+    client = HaClient(HaClientSettings(url="http://ha.local", token="secret-token"))
+    client._session.get = Mock(side_effect=requests.Timeout("secret-token"))  # type: ignore[method-assign]
+
+    with pytest.raises(HaTimeoutError):
+        client.list_entities()
+
+
+@pytest.mark.parametrize("status_code", [401, 403])
+def test_list_entities_maps_auth_errors(status_code: int) -> None:
+    client = _client_with_response(_response(status_code=status_code))
+
+    with pytest.raises(HaAuthError) as exc_info:
+        client.list_entities()
+
+    assert exc_info.value.status_code == status_code
+
+
+def test_list_entities_maps_http_errors() -> None:
+    client = _client_with_response(_response(status_code=500))
+
+    with pytest.raises(HaHttpError) as exc_info:
+        client.list_entities()
+
+    assert exc_info.value.status_code == 500
+
+
+def test_list_entities_rejects_invalid_json() -> None:
+    response = _response()
+    response.json.side_effect = ValueError("not json")
+    client = _client_with_response(response)
+
+    with pytest.raises(HaUnexpectedPayloadError):
+        client.list_entities()
+
+
+def test_list_entities_rejects_non_list_payload() -> None:
+    client = _client_with_response(_response(payload={"entity_id": "sensor.temperature"}))
+
+    with pytest.raises(HaUnexpectedPayloadError):
+        client.list_entities()

tests/ha/test_ha_reader.py

@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+from app.ha.client import HaClient, HaClientSettings
+from app.ha.reader import HaReader
+
+
+class FakeHaClient(HaClient):
+    def __init__(self) -> None:
+        super().__init__(HaClientSettings(url="http://test", token="token"))
+
+    def list_entities(self) -> list[dict[str, object]]:
+        return [
+            {
+                "entity_id": "sensor.temperature",
+                "state": "21.5",
+                "attributes": {
+                    "state_class": "measurement",
+                    "device_class": "temperature",
+                    "unit_of_measurement": "°C",
+                },
+            },
+            {
+                "entity_id": "light.living_room",
+                "state": "on",
+                "attributes": {},
+            },
+        ]
+
+
+def test_ha_reader_returns_summaries() -> None:
+    reader = HaReader(FakeHaClient())
+    summaries = reader.read_entities()
+    assert len(summaries) == 2
+    domains = {summary.domain for summary in summaries}
+    assert domains == {"sensor", "light"}
+    sensor = next(item for item in summaries if item.entity_id == "sensor.temperature")
+    assert sensor.unit_of_measurement == "°C"

tests/rules/test_heating.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+from app.ha.models import HaEntitySummary
+from app.rules.heating import HeatingRule
+from app.rules.recommender import Recommender
+
+
+def _sensor(entity_id: str) -> HaEntitySummary:
+    return HaEntitySummary(entity_id=entity_id, domain="sensor")
+
+
+def _climate(entity_id: str) -> HaEntitySummary:
+    return HaEntitySummary(entity_id=entity_id, domain="climate")
+
+
+def test_heating_rule_triggers() -> None:
+    rule = HeatingRule()
+    assert rule.matches([_climate("climate.living_room")])
+    assert rule.matches([_sensor("sensor.temperature_living")])
+
+
+def test_recommender_uses_rule() -> None:
+    recommender = Recommender(rules=[HeatingRule()])
+    assert recommender.run([_climate("climate.living_room")]) == [
+        "Prüfe Heizungsregelung: Aktiviere energiesparenden Modus bei Abwesenheit."
+    ]

tests/test_health.py

@@ -1,10 +1,10 @@
 from fastapi.testclient import TestClient
-from app.main import app
 
-client = TestClient(app)
+from app.main import app
 
 
 def test_health_returns_ok() -> None:
-    response = client.get("/health")
+    with TestClient(app) as client:
+        response = client.get("/health")
     assert response.status_code == 200
     assert response.json() == {"status": "ok"}