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/*
* Copyright (c) 2015 Oleg Morozenkov
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef TGBOT_EVENTBROADCASTER_H
#define TGBOT_EVENTBROADCASTER_H
#include <string>
#include <functional>
#include <vector>
#include <map>
#include "tgbot/types/Message.h"
namespace TgBot {
class EventHandler;
/**
* This class holds all event listeners.
* @ingroup general
*/
class EventBroadcaster {
friend EventHandler;
public:
typedef std::function<void (const Message::Ptr&)> MessageListener;
/**
* 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);
}
/**
* Registers listener which receives all messages with commands (messages with leading '/' char).
* @param commandName Command name which listener can handle.
* @param listener Listener.
*/
inline void onCommand(const std::string& commandName, const MessageListener& listener) {
_onCommandListeners[commandName] = listener;
}
/**
* 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);
}
/**
* 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);
}
private:
inline void broadcastAnyMessage(const Message::Ptr& message) const {
for (const MessageListener& item : _onAnyMessageListeners) {
item(message);
}
}
inline bool broadcastCommand(const std::string command, const Message::Ptr& message) const {
std::map<std::string, MessageListener>::const_iterator iter = _onCommandListeners.find(command);
if (iter == _onCommandListeners.end()) {
return false;
}
iter->second(message);
return true;
}
inline void broadcastUnknownCommand(const Message::Ptr& message) const {
for (const MessageListener& item : _onUnknownCommandListeners) {
item(message);
}
}
inline void broadcastNonCommandMessage(const Message::Ptr& message) const {
for (const MessageListener& item : _onNonCommandMessageListeners) {
item(message);
}
}
std::vector<MessageListener> _onAnyMessageListeners;
std::map<std::string, MessageListener> _onCommandListeners;
std::vector<MessageListener> _onUnknownCommandListeners;
std::vector<MessageListener> _onNonCommandMessageListeners;
};
}
#endif //TGBOT_EVENTBROADCASTER_H
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