MultiRoombaRover/plans/battery_manager_outline.md

general idea

• uses the rover's reported battery full, warn, and urgent values
• will apply to all rovers individually
• uses the rover locking system
• completely server side
• always use the battery warn value as 0% battery and the full value as 100%

first: the server-side server-wide event bus

• global server event bus
• used for realtime alerts between modules
• includes a way to tell where the event is coming from

what will the battery manager do?

• watch each rover's battery charge number (reported in sensors)
• if the number reaches warn, fire an event on the event bus
• the UI will show a warning to users, independently based on sensor data
• once the rover is docked and charging, lock it.
• when the battery is fully charged, unlock it.

while we're at it...

• add a lock reason to the rover locking system
• add the following to the rover roster in the UI session state:
  • battery full #
  • battery warn #
  • battery urgent #
• in the rover roster UI component, add a display for battery percentage and lock reason.
  • make the rover's background red when locked