Part 2 - Battery Power

Section 1 - Batteries

A battery is a kind of thing. A battery has a number called charge. The charge of a battery is usually 60.

A rechargeable battery is a kind of battery. A rechargeable battery has a number called maximum charge. The maximum charge of a rechargeable battery is usually 60.

Definition: a battery is discharged if its charge < 1.
Definition: a rechargeable battery is fully charged if its charge is its maximum charge.

[We make this rule occur at the beginning of the every turn rules so that if the devices are themselves doing something every turn while switched on, we don't get a sequence where the player removes a battery, the robot dog barks one last time anyway, and only then do we get the robot dog shutdown message.]
A first every turn rule (this is the check power sources rule):
    follow the energy management rules.

The energy management rules are a rulebook.

An energy management rule (this is the deplete or recharge batteries rule):
    repeat with hollow running through battery compartments:
        if the hollow is part of a device (called the machine):
            if a battery (called cell) is in the hollow:
                if the machine is wall-powered:
                    if the cell is a rechargeable battery and charge of the cell is less than the maximum charge of the cell:
                        increase the charge of the cell by the battery recharge of the machine;
                        if the charge of the cell is greater than the maximum charge of the cell:
                            now the charge of the cell is the maximum charge of the cell;
                        if the cell is fully charged and the player can see the machine:
                            carry out the notifying of full charge activity with the machine;
                otherwise if the machine is switched on:
                    decrease the charge of the cell by the battery drain of the machine;
                    if the player can see the machine:
                        carry out the warning about the failure activity with the machine.