private async Task TurnOnKettle()
{
await powerSwitch.SwitchOnAsync();
await heatingElement.SwitchOnAsync();
await powerLamp.SwitchOnAsync();
}
//event binding
private void InitializeComponents()
{
// 2.When the power switch is switched on, the kettle controller must activate the heating element and the lamp.
_powerSwitch.SwitchedOn += async delegate
{
// 7.When having a HeatingElementException when switching on,
// the controller must ensure that all the components are off.
try
{
await _powerLamp.SwitchOnAsync();
await _heatingElement.SwitchOnAsync();
}
catch (HeatingElementException ex)
{
await _powerSwitch.SwitchOffAsync();
await _powerLamp.SwitchOffAsync();
}
};
// 3.When the power switch is switched off, all components must be deactivated.
_powerSwitch.SwitchedOff += async delegate
{
await _powerLamp.SwitchOffAsync();
await _heatingElement.SwitchOffAsync();
};
// 5.When the water temperature reaches 100 degrees Celsius, the power must be switched off.
_temperatureSensor.ValueChanged += async delegate(object sender, ValueChangedEventArgs <int> e)
{
if (e.Value >= 100)
{
await _powerSwitch.SwitchOffAsync();
await _powerLamp.SwitchOffAsync();
await _heatingElement.SwitchOffAsync();
}
};
// 6... The kettle controller should switch off if the water is removed during heating.
_waterSensor.ValueChanged += async delegate(object sender, ValueChangedEventArgs <bool> e)
{
if (!e.Value)
{
await _powerSwitch.SwitchOffAsync();
}
};
_isComponentsInitialized = true;
}