PixelScanner.h

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#pragma once
 
#include <functional>
#include <memory>
#include <vector>
#include <mutex>
 
namespace Systemic::BluetoothLE
{
    class Scanner;
    class ScannedPeripheral;
}
 
namespace Systemic::Pixels
{
    class ScannedPixel;
 
    class PixelScanner
    {
    public:
        using ScannedPixelListener = std::function<void(const std::shared_ptr<const ScannedPixel>&)>;
 
    private:
        // Listener given by user
        const ScannedPixelListener _listener;
        // Bluetooth scanner instance
        std::shared_ptr<Systemic::BluetoothLE::Scanner> _scanner{};
        // List of scanned pixels
        std::vector<std::shared_ptr<const ScannedPixel>> _scannedPixels{};
 
        // Mutex used to modify list of scanned Pixels
        std::recursive_mutex _mutex{};
 
    public:
        explicit PixelScanner(const ScannedPixelListener& listener);
 
        ~PixelScanner();
 
        bool isScanning()
        {
            return _scanner != nullptr;
        }
 
        void copyScannedPixels(std::vector<std::shared_ptr<const ScannedPixel>>& outScannedPixels)
        {
            std::lock_guard lock{ _mutex };
 
            outScannedPixels.reserve(outScannedPixels.size() + _scannedPixels.size());
            for (auto& p : _scannedPixels)
            {
                outScannedPixels.emplace_back(p);
            }
        }
 
        void start();
 
        void stop();
 
        void clear();
    };
}