Base_Monitor.h

#pragma once
#include <string>
#include <Base_Packet.h>
#include <map>

namespace inaf::oasbo::PacketMonitors{

/**
 * @brief The BasePacketMonitor class is an abstract base class for packet monitors in the DAQ system.
 * 
 * This class provides a common interface for packet monitoring functionality.
 * Derived classes must implement the monit(), printStats(), and reset() methods.
 * The class also provides methods to access and retrieve statistics related to the monitored packets.
 */
class BasePacketMonitor{
protected:
	std::map<std::string, std::string> stats; /**< A map to store statistics related to the monitored packets. */
public:
	/**
	 * @brief Monitors a packet.
	 * 
	 * This pure virtual method is used to monitor a packet.
	 * Derived classes must implement this method to define the monitoring behavior.
	 * 
	 * @param packet The packet to be monitored.
	 */
	virtual void monit(PacketLib::BasePacket &packet) = 0;

	/**
	 * @brief Prints the statistics related to the monitored packets.
	 * 
	 * This pure virtual method is used to print the statistics related to the monitored packets.
	 * Derived classes must implement this method to define the printing behavior.
	 */
	virtual void printStats() = 0;

	/**
	 * @brief Resets the statistics related to the monitored packets.
	 * 
	 * This pure virtual method is used to reset the statistics related to the monitored packets.
	 * Derived classes must implement this method to define the resetting behavior.
	 */
	virtual void reset() = 0;

	/**
	 * @brief Retrieves the statistics map.
	 * 
	 * This method returns the map containing the statistics related to the monitored packets.
	 * 
	 * @return The map containing the statistics related to the monitored packets.
	 */
    virtual std::map<std::string, std::string> getStatsMap() const { return stats;}

    /**
     * @brief Retrieves a specific statistic.
     * 
     * This method retrieves a specific statistic from the statistics map.
     * If the statistic is not found, it returns std::nullopt.
     * 
     * @param stat The name of the statistic to retrieve.
     * @return An optional string containing the value of the statistic, or std::nullopt if the statistic is not found.
     */
    std::optional<std::string> getStat(std::string stat) const {
		try {
			return this->stats.at(stat);
		} catch (const std::out_of_range &) {
			return std::nullopt;
		}
    }

	/**
	 * @brief Default destructor.
	 */
	virtual ~BasePacketMonitor() = default;
};
}