salmanoff/hcore/include/senseApis/senseApiManager.h

#ifndef SENSE_API_MANAGER_H
#define SENSE_API_MANAGER_H

#include <config.h>
#include <memory>
#include <vector>
#include <string>
#include <optional>
#include <functional>

struct SenseApiInstance {
    int a;

    bool operator==(const SenseApiInstance& other) const {
        return a == other.a;
    }
};

class SenseApiLib {
public:
    std::string libraryPath;
    std::unique_ptr<void, decltype(&dlclose)> handle;

    SenseApiLib(const std::string& path)
        : libraryPath(path), handle(nullptr, &dlclose) {}
};

class SenseApiManager {
public:
    static SenseApiManager& getInstance()
    {
        static SenseApiManager instance
        {
#ifdef CONFIG_SENSEAPI_FOO
            "builtinApi1",
#endif
#ifdef CONFIG_SENSEAPI_BAR
            "builtinApi2",
#endif
            // X11 XCB is always built-in.
            "x11-xcb"
        };

        return instance;
    }

    void registerSenseApi(const SenseApiInstance& apiInstance);
    void unregisterSenseApi(const SenseApiInstance& apiInstance);

    SenseApiLib& loadSenseApiLib(const std::string& libraryPath);
    std::optional<std::reference_wrapper<SenseApiLib>> getSenseApiLib(
        const std::string& libraryPath);
    void unloadSenseApiLib(const std::string& libraryPath);

private:
    SenseApiManager() = delete;
    SenseApiManager(std::initializer_list<std::string> builtinApis)
        : builtinSenseApis(builtinApis) {}
    ~SenseApiManager() = default;

    SenseApiManager(const SenseApiManager&) = delete;
    SenseApiManager& operator=(const SenseApiManager&) = delete;

    std::vector<std::unique_ptr<SenseApiInstance>> senseApiInstances;
    std::vector<std::unique_ptr<SenseApiLib>> senseApiLibs;
    const std::vector<std::string> builtinSenseApis;
};

#endif // SENSE_API_MANAGER_H