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#pragma once
#include <map>
#include <list>
#include <set>
#include <initializer_list>
#include "object.hpp"
#include "task.hpp"
#include "types.h"
#include <functional>
#include "priority.hpp"
namespace flat
{
namespace core
{
class signal : virtual public object, public prioritized
{
public:
object * sender;
void * data; // TODO, avoid this void pointer
priority prior;
signal( object * sender,
const std::string& id = "",
void * data,
prior_t prior = prior_t::none);
/* Alias to flat::core::channel::emit() */
bool emit(const std::string& channel) const;
};
/* Channel class */
class channel : virtual public object
{
/* Post processing signal stacking */
prior_set<signal> stack;
/* Listeners list */
std::list<listener*> listeners;
/* Synchronous task checking for signals */
task * checker;
/* Channel mapping */
static std::map<std::string, channel*> channels;
public:
channel(const std::string& id = "", prior_t priority = prior_t::none);
~channel();
void emit(const signal&);
void connect(const listener*);
void disconnect(const listener*);
static channel * find_channel(const std::string&);
void post_processing();
};
/* Listener class */
class listener : virtual public object
{
std::list<std::string> filters;
bool check_in_filters(const std::string&) const;
callback_t m_callback;
channel * parent;
public:
listener( callback_t m_callback,
const std::initializer_list<std::string>& filters = {});
~listener();
void add_filter(const std::string&);
void remove_filter(const std::string&);
bool connect(const std::string&);
bool disconnect(const std::string&);
void invoke(const signal&);
/* Allow to safely bind e functor */
template<class T>
static listener create( const (T::*method(const object*, void*))& fct,
T* ptr,
const std::initializer_list<std::string>& filters = {})
{
return listener(std::bind(fct, ptr), filters);
}
typedef std::function<void(const object*, void*)> callback_t;
};
}
}
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