Add read_multiplier field

Signed-off-by: Marek Pikuła <[email protected]>

hamqtt_fs_publisher/__main__.py

@@ -46,6 +46,14 @@ def publish_read(self):
         state = self._config.read_path.read_text("utf-8")
         if self._config.read_strip:
             state = state.strip()
+        if self._config.read_multiplier is not None:
+            try:
+                state = float(state) * self._config.read_multiplier
+            except ValueError:
+                logger.error(
+                    "{}: Failed to apply multiplication due to float conversion error.",
+                    self._log_name,
+                )
         logger.debug('{}: Publishing state "{}".', self._log_name, state)
         self._entity.publish_state(state)
         if not self._stop_event.is_set():
@@ -88,6 +96,7 @@ def main(config: Path):
     logger.info("Parsing configuration...")
     config_found = False
     config_default_dir = Path("hamqtt_fs_publisher")
+    # TODO: Search for both config.json and yaml if not defined.
     for prefix in (
         Path(),
         Path("/etc") / config_default_dir,

hamqtt_fs_publisher/configuration.py

@@ -34,6 +34,9 @@ class ReadMixin(BaseModel):  # pylint: disable=R0903
     read_strip: bool = Field(
         True, description="Perform a strip operation on the read value."
     )
+    read_multiplier: Optional[float] = Field(
+        None, description="Multiply read value by given amount."
+    )
 
 
 class WriteMixin(BaseModel):  # pylint: disable=R0903

hamqtt_fs_publisher/configuration.schema.json

@@ -183,6 +183,11 @@
                     "default": true,
                     "type": "boolean"
                 },
+                "read_multiplier": {
+                    "title": "Read Multiplier",
+                    "description": "Multiply read value by given amount.",
+                    "type": "number"
+                },
                 "unit": {
                     "title": "Unit",
                     "description": "Unit of measurement, example: \"\u00b0C\",",