WeatherRequestEngine.h

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#ifndef WEATHERREQUESTENGINE_H
#define WEATHERREQUESTENGINE_H
 
#include "WeatherData.h" // Includes WeatherData and LocationData structs
#include <QMap> // For QMap to store location cache
#include <QNetworkReply> // For QNetworkReply to handle network responses
#include <QObject> // Base class for WeatherRequestEngine, enabling signals/slots
#include <QTimer> // Timer
// Forward declarations to avoid heavy includes and circular dependencies
class QNetworkAccessManager;
class QueryCached;
 
class WeatherRequestEngine : public QObject {
Q_OBJECT // Enables Qt's meta-object system features like signals and slots
 
    public :
    explicit WeatherRequestEngine(const QString& city, QObject* parent = nullptr);
 
    ~WeatherRequestEngine() = default;
 
    void queryWeatherData();
 
signals:
    void weatherDataReady(const WeatherData data);
 
    void errorOccurred(const QString& errorMessage);
 
private slots:
    void onGeoReply(QNetworkReply* reply);
 
    void onWeatherReply(QNetworkReply* reply);
 
    void forceQueryWeatherData();
 
private:
    QNetworkAccessManager* manager; 
    QString city_request; 
    QueryCached* cached_weather_data; 
    QTimer* timeoutTimer; 
    static QMap<QString, LocationData> s_locationCache;
 
    LocationData currentLocation; 
    bool locationFound { false }; 
};
 
#endif // WEATHERREQUESTENGINE_H