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patterns/observer/request/weatherdata.d

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module observer.request.weatherdata;
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import observer.request.subject;
import observer.request.observer;
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import std.algorithm : remove, countUntil;
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class WeatherData : Subject
{
private:
Observer[] observers;
float temperature, humidity, pressure;
public:
override void registerObserver(Observer o)
{
observers ~= o;
}
override void removeObserver(Observer o)
{
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// Вызовет ошибку в случае отсутствия элемента в массиве после его поиска
// observers = observers.remove(observers.countUntil(o));
observers = remove!(current => current == o)(observers);
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}
override void notifyObservers()
{
foreach (Observer o; observers)
{
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o.update();
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}
}
void measurementsChanged()
{
notifyObservers();
}
void setMeasurements(float temperature, float humidity, float pressure)
{
this.temperature = temperature;
this.humidity = humidity;
this.pressure = pressure;
measurementsChanged();
}
@property float getTemperature()
{
return temperature;
}
@property float getHumidity()
{
return humidity;
}
@property float getPressure()
{
return pressure;
}
}