28 lines
902 B
Elixir
28 lines
902 B
Elixir
defmodule RemoteControlCar do
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@enforce_keys [:nickname]
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defstruct [:nickname, battery_percentage: 100, distance_driven_in_meters: 0]
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def new(nickname \\ "none"), do: %__MODULE__{nickname: nickname}
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def display_distance(%__MODULE__{distance_driven_in_meters: distance_driven_in_meters} = _remote_car) do
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"#{distance_driven_in_meters} meters"
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end
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def display_battery(%__MODULE__{battery_percentage: 0} = _remote_car) do
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"Battery empty"
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end
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def display_battery(%__MODULE__{battery_percentage: battery_percentage} = _remote_car) do
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"Battery at #{battery_percentage}%"
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end
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def drive(%__MODULE__{battery_percentage: 0} = remote_car), do: remote_car
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def drive(%__MODULE__{} = remote_car) do
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%{
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remote_car |
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battery_percentage: remote_car.battery_percentage - 1,
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distance_driven_in_meters: remote_car.distance_driven_in_meters + 20,
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}
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end
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end
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