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#ifndef TGBOT_EVENTBROADCASTER_H
#define TGBOT_EVENTBROADCASTER_H
#include "tgbot/export.h"
#include "tgbot/types/Message.h"
#include "tgbot/types/InlineQuery.h"
#include "tgbot/types/ChosenInlineResult.h"
#include "tgbot/types/CallbackQuery.h"
#include <initializer_list>
#include <string>
#include <functional>
#include <vector>
#include <unordered_map>
namespace TgBot {
class EventHandler;
/**
* @brief This class holds all event listeners.
*
* @ingroup general
*/
class TGBOT_API EventBroadcaster {
friend EventHandler;
public:
typedef std::function<void (const Message::Ptr)> MessageListener;
typedef std::function<void (const InlineQuery::Ptr)> InlineQueryListener;
typedef std::function<void (const ChosenInlineResult::Ptr)> ChosenInlineResultListener;
typedef std::function<void (const CallbackQuery::Ptr)> CallbackQueryListener;
/**
* @brief Registers listener which receives all messages which the bot can ever receive.
* @param listener Listener.
*/
inline void onAnyMessage(const MessageListener& listener) {
_onAnyMessageListeners.push_back(listener);
}
/**
* @brief Registers listener which receives all messages with commands (messages with leading '/' char).
* @param commandName Command name which listener can handle.
* @param listener Listener. Pass nullptr to remove listener of command
*/
inline void onCommand(const std::string& commandName, const MessageListener& listener) {
if (listener) {
_onCommandListeners[commandName] = listener;
} else {
_onCommandListeners.erase(commandName);
}
}
/**
* @brief Registers listener which receives all messages with commands (messages with leading '/' char).
* @param commandsList Commands names which listener can handle.
* @param listener Listener. Pass nullptr to remove listener of commands
*/
inline void onCommand(const std::initializer_list<std::string>& commandsList, const MessageListener& listener) {
if (listener) {
for (const auto& command : commandsList) {
_onCommandListeners[command] = listener;
}
} else {
for (const auto& command : commandsList) {
_onCommandListeners.erase(command);
}
}
}
/**
* @brief Registers listener which receives all messages with commands (messages with leading '/' char) which haven't been handled by other listeners.
* @param listener Listener.
*/
inline void onUnknownCommand(const MessageListener& listener) {
_onUnknownCommandListeners.push_back(listener);
}
/**
* @brief Registers listener which receives all messages without commands (messages with no leading '/' char)
* @param listener Listener.
*/
inline void onNonCommandMessage(const MessageListener& listener) {
_onNonCommandMessageListeners.push_back(listener);
}
/**
* @brief Registers listener which receives all the inline query.
* @param listener Listener.
*/
inline void onInlineQuery(const InlineQueryListener& listener) {
_onInlineQueryListeners.push_back(listener);
}
/**
* @brief Registers listener which receives all the chosen inline result.
* @param listener Listener.
*/
inline void onChosenInlineResult(const ChosenInlineResultListener& listener){
_onChosenInlineResultListeners.push_back(listener);
}
/**
* @brief Registers listener which receives all the callback query.
* @param listener Listener.
*/
inline void onCallbackQuery(const CallbackQueryListener& listener){
_onCallbackQueryListeners.push_back(listener);
}
private:
template<typename ListenerType, typename ObjectType>
inline void broadcast(const std::vector<ListenerType>& listeners, const ObjectType object) const {
if (!object)
return;
for (const ListenerType& item : listeners) {
item(object);
}
}
inline void broadcastAnyMessage(const Message::Ptr& message) const {
broadcast<MessageListener, Message::Ptr>(_onAnyMessageListeners, message);
}
inline bool broadcastCommand(const std::string& command, const Message::Ptr& message) const {
auto iter = _onCommandListeners.find(command);
if (iter == _onCommandListeners.end()) {
return false;
}
iter->second(message);
return true;
}
inline void broadcastUnknownCommand(const Message::Ptr& message) const {
broadcast<MessageListener, Message::Ptr>(_onUnknownCommandListeners, message);
}
inline void broadcastNonCommandMessage(const Message::Ptr& message) const {
broadcast<MessageListener, Message::Ptr>(_onNonCommandMessageListeners, message);
}
inline void broadcastInlineQuery(const InlineQuery::Ptr& query) const {
broadcast<InlineQueryListener, InlineQuery::Ptr>(_onInlineQueryListeners, query);
}
inline void broadcastChosenInlineResult(const ChosenInlineResult::Ptr& result) const {
broadcast<ChosenInlineResultListener, ChosenInlineResult::Ptr>(_onChosenInlineResultListeners, result);
}
inline void broadcastCallbackQuery(const CallbackQuery::Ptr& result) const {
broadcast<CallbackQueryListener, CallbackQuery::Ptr>(_onCallbackQueryListeners, result);
}
std::vector<MessageListener> _onAnyMessageListeners;
std::unordered_map<std::string, MessageListener> _onCommandListeners;
std::vector<MessageListener> _onUnknownCommandListeners;
std::vector<MessageListener> _onNonCommandMessageListeners;
std::vector<InlineQueryListener> _onInlineQueryListeners;
std::vector<ChosenInlineResultListener> _onChosenInlineResultListeners;
std::vector<CallbackQueryListener> _onCallbackQueryListeners;
};
}
#endif //TGBOT_EVENTBROADCASTER_H
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