power: add "on_when_upload_queued" option

When this option is set to "True", the device will power on after the file manager queues an upload for printing.

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

moonraker/components/power.py

@@ -116,6 +116,8 @@ class PrinterPower:
             "set_device_power", self.set_device_power)
         self.server.register_event_handler(
             "server:klippy_shutdown", self._handle_klippy_shutdown)
+        self.server.register_event_handler(
+            "file_manager:upload_queued", self._handle_upload_queued)
         self.server.register_notification("power:power_changed")
 
     async def _check_klippy_printing(self) -> bool:
@@ -162,6 +164,16 @@ class PrinterPower:
                     " klippy shutdown")
                 await self._process_request(dev, "off")
 
+    async def _handle_upload_queued(self, filename: str) -> None:
+        for name, dev in self.devices.items():
+            if dev.has_on_when_queued():
+                if dev.get_state() == "on":
+                    # device already on
+                    continue
+                logging.debug(
+                    f"File '{filename}' queued, powering on device [{name}]")
+                await self._process_request(dev, "on")
+
     async def _handle_list_devices(self,
                                    web_request: WebRequest
                                    ) -> Dict[str, Any]:
@@ -290,6 +302,7 @@ class PowerDevice:
                 raise config.error("Option 'restart_delay' must be above 0.0")
         self.bound_service: Optional[str] = config.get('bound_service', None)
         self.need_scheduled_restart = False
+        self.on_when_queued = config.getboolean('on_when_upload_queued', False)
 
     def _is_bound_to_klipper(self):
         return (
@@ -339,6 +352,9 @@ class PowerDevice:
     def has_off_when_shutdown(self) -> bool:
         return self.off_when_shutdown
 
+    def has_on_when_queued(self) -> bool:
+        return self.on_when_queued
+
     def initialize(self) -> Optional[Coroutine]:
         if self.bound_service is None:
             return None