Add ServiceValidationError and translation support

homeassistant/components/homeassistant/strings.json

@@ -136,5 +136,10 @@
       "name": "Reload all",
       "description": "Reload all YAML configuration that can be reloaded without restarting Home Assistant."
     }
+  },
+  "exceptions": {
+    "service_not_found": {
+      "message": "Service {domain}.{service} not found."
+    }
   }
 }

homeassistant/components/mqtt/__init__.py

@@ -24,7 +24,12 @@
     SERVICE_RELOAD,
 )
 from homeassistant.core import HassJob, HomeAssistant, ServiceCall, callback
-from homeassistant.exceptions import HomeAssistantError, TemplateError, Unauthorized
+from homeassistant.exceptions import (
+    HomeAssistantError,
+    ServiceValidationError,
+    TemplateError,
+    Unauthorized,
+)
 from homeassistant.helpers import config_validation as cv, event as ev, template
 from homeassistant.helpers.device_registry import DeviceEntry
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
@@ -246,7 +251,14 @@ async def async_check_config_schema(
                     message, _ = conf_util._format_config_error(
                         ex, domain, config, integration.documentation
                     )
-                    raise HomeAssistantError(message) from ex
+                    raise ServiceValidationError(
+                        message,
+                        translation_domain=DOMAIN,
+                        translation_key="invalid_platform_config",
+                        translation_placeholders={
+                            "domain": domain,
+                        },
+                    ) from ex
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:

homeassistant/components/mqtt/strings.json

@@ -207,5 +207,10 @@
       "name": "[%key:common::action::reload%]",
       "description": "Reloads MQTT entities from the YAML-configuration."
     }
+  },
+  "exceptions": {
+    "invalid_platform_config": {
+      "message": "Reloading YAML config for manually configured MQTT `{domain}` failed. See logs for more details."
+    }
   }
 }

homeassistant/components/websocket_api/commands.py

@@ -22,6 +22,7 @@
 from homeassistant.exceptions import (
     HomeAssistantError,
     ServiceNotFound,
+    ServiceValidationError,
     TemplateError,
     Unauthorized,
 )
@@ -238,14 +239,53 @@ async def handle_call_service(
         connection.send_result(msg["id"], {"context": context})
     except ServiceNotFound as err:
         if err.domain == msg["domain"] and err.service == msg["service"]:
-            connection.send_error(msg["id"], const.ERR_NOT_FOUND, "Service not found.")
+            connection.send_error(
+                msg["id"],
+                const.ERR_NOT_FOUND,
+                f"Service {err.domain}.{err.service} not found.",
+                translation_domain=err.translation_domain,
+                translation_key=err.translation_key,
+                translation_placeholders=err.translation_placeholders,
+            )
         else:
-            connection.send_error(msg["id"], const.ERR_HOME_ASSISTANT_ERROR, str(err))
+            # The called service called another service which does not exist
+            connection.send_error(
+                msg["id"],
+                const.ERR_HOME_ASSISTANT_ERROR,
+                f"Service {err.domain}.{err.service} called service "
+                f"{msg['domain']}.{msg['service']} which was not found.",
+                translation_domain=const.DOMAIN,
+                translation_key="child_service_not_found",
+                translation_placeholders={
+                    "domain": err.domain,
+                    "service": err.service,
+                    "child_domain": msg["domain"],
+                    "child_service": msg["service"],
+                },
+            )
     except vol.Invalid as err:
         connection.send_error(msg["id"], const.ERR_INVALID_FORMAT, str(err))
+    except ServiceValidationError as err:
+        connection.logger.error(err)
+        connection.logger.debug("", exc_info=err)
+        connection.send_error(
+            msg["id"],
+            const.ERR_SERVICE_VALIDATION_ERROR,
+            f"Validation error: {err}",
+            translation_domain=err.translation_domain,
+            translation_key=err.translation_key,
+            translation_placeholders=err.translation_placeholders,
+        )
     except HomeAssistantError as err:
         connection.logger.exception(err)
-        connection.send_error(msg["id"], const.ERR_HOME_ASSISTANT_ERROR, str(err))
+        connection.send_error(
+            msg["id"],
+            const.ERR_HOME_ASSISTANT_ERROR,
+            str(err),
+            translation_domain=err.translation_domain,
+            translation_key=err.translation_key,
+            translation_placeholders=err.translation_placeholders,
+        )
     except Exception as err:  # pylint: disable=broad-except
         connection.logger.exception(err)
         connection.send_error(msg["id"], const.ERR_UNKNOWN_ERROR, str(err))

homeassistant/components/websocket_api/connection.py

@@ -134,9 +134,26 @@ def send_event(self, msg_id: int, event: Any | None = None) -> None:
         self.send_message(messages.event_message(msg_id, event))
 
     @callback
-    def send_error(self, msg_id: int, code: str, message: str) -> None:
-        """Send a error message."""
-        self.send_message(messages.error_message(msg_id, code, message))
+    def send_error(
+        self,
+        msg_id: int,
+        code: str,
+        message: str,
+        translation_key: str | None = None,
+        translation_domain: str | None = None,
+        translation_placeholders: dict[str, Any] | None = None,
+    ) -> None:
+        """Send an error message."""
+        self.send_message(
+            messages.error_message(
+                msg_id,
+                code,
+                message,
+                translation_key=translation_key,
+                translation_domain=translation_domain,
+                translation_placeholders=translation_placeholders,
+            )
+        )
 
     @callback
     def async_handle_binary(self, handler_id: int, payload: bytes) -> None:

homeassistant/components/websocket_api/const.py

@@ -32,6 +32,7 @@
 ERR_NOT_FOUND: Final = "not_found"
 ERR_NOT_SUPPORTED: Final = "not_supported"
 ERR_HOME_ASSISTANT_ERROR: Final = "home_assistant_error"
+ERR_SERVICE_VALIDATION_ERROR: Final = "service_validation_error"
 ERR_UNKNOWN_COMMAND: Final = "unknown_command"
 ERR_UNKNOWN_ERROR: Final = "unknown_error"
 ERR_UNAUTHORIZED: Final = "unauthorized"

homeassistant/components/websocket_api/messages.py

@@ -65,12 +65,29 @@ def construct_result_message(iden: int, payload: str) -> str:
     return f'{{"id":{iden},"type":"result","success":true,"result":{payload}}}'
 
 
-def error_message(iden: int | None, code: str, message: str) -> dict[str, Any]:
+def error_message(
+    iden: int | None,
+    code: str,
+    message: str,
+    translation_key: str | None = None,
+    translation_domain: str | None = None,
+    translation_placeholders: dict[str, Any] | None = None,
+) -> dict[str, Any]:
     """Return an error result message."""
+    error_payload: dict[str, Any] = {
+        "code": code,
+        "message": message,
+    }
+    # In case `translation_key` is `None` we do not set it, nor the
+    # `translation`_placeholders` and `translation_domain`.
+    if translation_key is not None:
+        error_payload["translation_key"] = translation_key
+        error_payload["translation_placeholders"] = translation_placeholders
+        error_payload["translation_domain"] = translation_domain
     return {
         "id": iden,
         **BASE_ERROR_MESSAGE,
-        "error": {"code": code, "message": message},
+        "error": error_payload,
     }
 
 

homeassistant/components/websocket_api/strings.json

@@ -0,0 +1,7 @@
+{
+  "exceptions": {
+    "child_service_not_found": {
+      "message": "Service {domain}.{service} called service {child_domain}.{child_service} which was not found."
+    }
+  }
+}

homeassistant/exceptions.py

@@ -12,6 +12,23 @@
 class HomeAssistantError(Exception):
     """General Home Assistant exception occurred."""
 
+    def __init__(
+        self,
+        *args: object,
+        translation_domain: str | None = None,
+        translation_key: str | None = None,
+        translation_placeholders: dict[str, str] | None = None,
+    ) -> None:
+        """Initialize exception."""
+        super().__init__(*args)
+        self.translation_domain = translation_domain
+        self.translation_key = translation_key
+        self.translation_placeholders = translation_placeholders
+
+
+class ServiceValidationError(HomeAssistantError):
+    """A validation exception occurred when calling a service."""
+
 
 class InvalidEntityFormatError(HomeAssistantError):
     """When an invalid formatted entity is encountered."""
@@ -165,13 +182,19 @@ class ServiceNotFound(HomeAssistantError):
 
     def __init__(self, domain: str, service: str) -> None:
         """Initialize error."""
-        super().__init__(self, f"Service {domain}.{service} not found")
+        super().__init__(
+            self,
+            f"Service {domain}.{service} not found.",
+            translation_domain="homeassistant",
+            translation_key="service_not_found",
+            translation_placeholders={"domain": domain, "service": service},
+        )
         self.domain = domain
         self.service = service
 
     def __str__(self) -> str:
         """Return string representation."""
-        return f"Unable to find service {self.domain}.{self.service}"
+        return f"Service {self.domain}.{self.service} not found."
 
 
 class MaxLengthExceeded(HomeAssistantError):

script/hassfest/translations.py

@@ -328,6 +328,10 @@ def gen_strings_schema(config: Config, integration: Integration) -> vol.Schema:
                 ),
                 slug_validator=cv.slug,
             ),
+            vol.Optional("exceptions"): cv.schema_with_slug_keys(
+                {vol.Optional("message"): translation_value_validator},
+                slug_validator=cv.slug,
+            ),
             vol.Optional("services"): cv.schema_with_slug_keys(
                 {
                     vol.Required("name"): translation_value_validator,

tests/components/trace/test_websocket_api.py

@@ -205,7 +205,7 @@ def next_id():
     _assert_raw_config(domain, sun_config, trace)
     assert trace["blueprint_inputs"] is None
     assert trace["context"]
-    assert trace["error"] == "Unable to find service test.automation"
+    assert trace["error"] == "Service test.automation not found."
     assert trace["state"] == "stopped"
     assert trace["script_execution"] == "error"
     assert trace["item_id"] == "sun"
@@ -893,7 +893,7 @@ def next_id():
     assert len(_find_traces(response["result"], domain, "sun")) == 1
     trace = _find_traces(response["result"], domain, "sun")[0]
     assert trace["last_step"] == last_step[0].format(prefix=prefix)
-    assert trace["error"] == "Unable to find service test.automation"
+    assert trace["error"] == "Service test.automation not found."
     assert trace["state"] == "stopped"
     assert trace["script_execution"] == script_execution[0]
     assert trace["timestamp"]
@@ -1632,7 +1632,7 @@ def next_id():
     assert trace["config"]["id"] == "sun"
     assert trace["blueprint_inputs"] == sun_config
     assert trace["context"]
-    assert trace["error"] == "Unable to find service test.automation"
+    assert trace["error"] == "Service test.automation not found."
     assert trace["state"] == "stopped"
     assert trace["script_execution"] == "error"
     assert trace["item_id"] == "sun"

tests/components/websocket_api/test_commands.py

@@ -19,7 +19,7 @@
 from homeassistant.components.websocket_api.const import FEATURE_COALESCE_MESSAGES, URL
 from homeassistant.const import SIGNAL_BOOTSTRAP_INTEGRATIONS
 from homeassistant.core import Context, HomeAssistant, State, callback
-from homeassistant.exceptions import HomeAssistantError
+from homeassistant.exceptions import HomeAssistantError, ServiceValidationError
 from homeassistant.helpers import device_registry as dr
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.loader import async_get_integration
@@ -343,6 +343,13 @@ async def test_call_service_not_found(
     assert msg["type"] == const.TYPE_RESULT
     assert not msg["success"]
     assert msg["error"]["code"] == const.ERR_NOT_FOUND
+    assert msg["error"]["message"] == "Service domain_test.test_service not found."
+    assert msg["error"]["translation_placeholders"] == {
+        "domain": "domain_test",
+        "service": "test_service",
+    }
+    assert msg["error"]["translation_key"] == "service_not_found"
+    assert msg["error"]["translation_domain"] == "homeassistant"
 
 
 async def test_call_service_child_not_found(
@@ -370,6 +377,18 @@ async def serv_handler(call):
     assert msg["type"] == const.TYPE_RESULT
     assert not msg["success"]
     assert msg["error"]["code"] == const.ERR_HOME_ASSISTANT_ERROR
+    assert (
+        msg["error"]["message"] == "Service non.existing called service "
+        "domain_test.test_service which was not found."
+    )
+    assert msg["error"]["translation_placeholders"] == {
+        "domain": "non",
+        "service": "existing",
+        "child_domain": "domain_test",
+        "child_service": "test_service",
+    }
+    assert msg["error"]["translation_key"] == "child_service_not_found"
+    assert msg["error"]["translation_domain"] == "websocket_api"
 
 
 async def test_call_service_schema_validation_error(
@@ -450,10 +469,26 @@ async def test_call_service_error(
 
     @callback
     def ha_error_call(_):
-        raise HomeAssistantError("error_message")
+        raise HomeAssistantError(
+            "error_message",
+            translation_domain="test",
+            translation_key="custom_error",
+            translation_placeholders={"option": "bla"},
+        )
 
     hass.services.async_register("domain_test", "ha_error", ha_error_call)
 
+    @callback
+    def service_error_call(_):
+        raise ServiceValidationError(
+            "error_message",
+            translation_domain="test",
+            translation_key="custom_error",
+            translation_placeholders={"option": "bla"},
+        )
+
+    hass.services.async_register("domain_test", "service_error", service_error_call)
+
     async def unknown_error_call(_):
         raise ValueError("value_error")
 
@@ -474,20 +509,42 @@ async def unknown_error_call(_):
     assert msg["success"] is False
     assert msg["error"]["code"] == "home_assistant_error"
     assert msg["error"]["message"] == "error_message"
+    assert msg["error"]["translation_placeholders"] == {"option": "bla"}
+    assert msg["error"]["translation_key"] == "custom_error"
+    assert msg["error"]["translation_domain"] == "test"
 
     await websocket_client.send_json(
         {
             "id": 6,
             "type": "call_service",
             "domain": "domain_test",
-            "service": "unknown_error",
+            "service": "service_error",
         }
     )
 
     msg = await websocket_client.receive_json()
     assert msg["id"] == 6
     assert msg["type"] == const.TYPE_RESULT
     assert msg["success"] is False
+    assert msg["error"]["code"] == "service_validation_error"
+    assert msg["error"]["message"] == "Validation error: error_message"
+    assert msg["error"]["translation_placeholders"] == {"option": "bla"}
+    assert msg["error"]["translation_key"] == "custom_error"
+    assert msg["error"]["translation_domain"] == "test"
+
+    await websocket_client.send_json(
+        {
+            "id": 7,
+            "type": "call_service",
+            "domain": "domain_test",
+            "service": "unknown_error",
+        }
+    )
+
+    msg = await websocket_client.receive_json()
+    assert msg["id"] == 7
+    assert msg["type"] == const.TYPE_RESULT
+    assert msg["success"] is False
     assert msg["error"]["code"] == "unknown_error"
     assert msg["error"]["message"] == "value_error"