modules/geolocation/cities.h

//
// Created by gabridc on 5/6/21.
//
#pragma once
#include <QDebug>
 
#include <QObject>
#include <QThread>
 
#include "kdtree.hpp"
 
#include "imagetools_export.h"
 
class City;
class CitiesDB;
class KDTree_Cities
{
 
public:
    KDTree_Cities *instance()
    {
        static KDTree_Cities instance;
        return &instance;
    }
 
private:
    KDTree_Cities();
};
 
/**
 * @brief A wrapper to give access to al the cities information in the data base
 */
class IMAGETOOLS_EXPORT Cities : public QObject
{
    Q_OBJECT
    
public:
 
    static Cities *getInstance()
    {
        qWarning() << "GETTIG CITIES INSTANCE" << QThread::currentThread();
 
        if (m_instance)
            return m_instance;
 
        m_instance = new Cities;
        return m_instance;
    }
 
    City *findCity(double latitude, double longitude);
    City *city(const QString&);
    
private:
    static Cities *m_instance;
 
    Cities(QObject * parent = nullptr);
 
    ~Cities();
    Cities(const Cities &) = delete;
    Cities &operator=(const Cities &) = delete;
    Cities(Cities &&) = delete;
    Cities &operator=(Cities &&) = delete;
 
    static KDTree *m_citiesTree;
 
    void parseCities();
 
    CitiesDB *db();
    QHash<Qt::HANDLE, CitiesDB*> m_dbs;
    
Q_SIGNALS:
    void citiesReady();
};