event_bus.h

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#pragma once

 
#include <functional>
#include <string>
#include <typeinfo>
#include <vector>
 
namespace satdump
{
    class EventBus
    {
    private:
        std::vector<std::pair<std::string, std::function<void(void *)>>> all_handlers;
 
    public:
        template <typename T>
        void register_handler(std::function<void(T)> handler_fun)
        {
            all_handlers.push_back({std::string(typeid(T).name()), [handler_fun](void *raw)
                                    {
                                        T evt = *((T *)raw); // Cast struct to original type
                                        handler_fun(evt);    // Call real handler
                                    }});
        }

        template <typename T>
        void fire_event(T evt)
        {
            for (std::pair<std::string, std::function<void(void *)>> h : all_handlers) // Iterate through all registered functions
                if (std::string(typeid(T).name()) == h.first)                          // Check struct type is the same
                    h.second((void *)&evt);                                            // Fire handler up
        }

        void fire_event(void *evt, std::string evt_name)
        {
            for (std::pair<std::string, std::function<void(void *)>> h : all_handlers) // Iterate through all registered functions
                if (evt_name == h.first)                                               // Check struct type is the same
                    h.second(evt);                                                     // Fire handler up
        }
    };
} // namespace satdump