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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>
namespace flat
{
namespace core
{
class signal;
class channel;
}
}
class flat::core::signal : virtual public flat::core::object
{
public:
flat::core::object * sender;
priority prior;
signal( flat::core::object * sender,
const std::string& id = "",
priority prior = 5);
/* Alias to flat::core::channel::emit() */
bool emit(const std::string& channel) const;
enum class priority : uint8_t
{
instant = 0,
highest,
high,
none,
low,
lowest
};
};
/* Channel class */
class flat::core::channel : virtual public flat::core::object
{
/* Post processing signal stacking */
stack_t stack;
/* Listeners list */
std::list<flat::core::listener> listeners;
/* Synchronous task checking for signals */
task_s * checker;
/* Channel mapping */
static std::map<std::string, channel*> channels;
public:
flat::core::channel(const std::string& id = "", flat::core::task::priority prior = flat::core::task::priority::none);
~flat::core::channel();
void emit(const flat::core::signal&);
void connect(flat::core::listener_s*);
void disconnect(flat::core::listener_s*);
static flat::core::channel * find_channel(const std::string&);
void post_processing(void*);
/* Functor for order comparison */
struct sig_prior_cmp {
bool operator()(const flat::core::signal&, const flat::core::signal&) const;
};
typedef std::set<flat::core::signal, sig_prior_cmp> stack_t;
};
/* Listener class */
class flat::core::listener : virtual public flat::core::object
{
std::list<std::string> filters;
bool check_in_filters(const std::string&) const;
std::function<void(const flat::core::object*)> m_callback;
flat::core::channel * parent = 0;
public:
listener( std::function<void()> 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 flat::core::signal&);
};
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