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/*
* The Mana Client
* Copyright (C) 2010 The Mana Developers
*
* This file is part of The Mana Client.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EVENT_H
#define EVENT_H
#include <string>
#include <map>
#include <set>
namespace Mana
{
// Possible exception that can be thrown
enum BadEvent {
BAD_KEY,
BAD_VALUE,
KEY_ALREADY_EXISTS
};
class Listener;
typedef std::set<Listener *> ListenerSet;
typedef std::map<std::string, ListenerSet > ListenMap;
class VariableData;
typedef std::map<std::string, VariableData *> VariableMap;
#define SERVER_NOTICE(message) { \
Mana::Event event("ServerNotice"); \
event.setString("message", message); \
event.trigger("Notices", event); }
class Event
{
public:
/**
* Makes an event with the given name.
*/
Event(const std::string &name)
{ mEventName = name; }
~Event();
/**
* Returns the name of the event.
*/
const std::string &getName() const
{ return mEventName; }
/**
* Sets the given variable to the given integer, if it isn't already set.
*/
void setInt(const std::string &key, int value) throw (BadEvent);
/**
* Returns the given variable if it is set and an integer.
*/
int getInt(const std::string &key) const throw (BadEvent);
/**
* Returns the given variable if it is set and an integer, returning the
* given default otherwise.
*/
inline int getInt(const std::string &key, int defaultValue) const
{ try { return getInt(key); } catch (BadEvent) { return defaultValue; }}
/**
* Returns true if the given variable exists and is an integer.
*/
bool hasInt(const std::string &key) const;
/**
* Sets the given variable to the given string, if it isn't already set.
*/
void setString(const std::string &key, const std::string &value) throw (BadEvent);
/**
* Returns the given variable if it is set and a string.
*/
const std::string &getString(const std::string &key) const throw (BadEvent);
/**
* Returns the given variable if it is set and a string, returning the
* given default otherwise.
*/
inline std::string getString(const std::string &key,
const std::string &defaultValue) const
{ try { return getString(key); } catch (BadEvent) { return defaultValue; }}
/**
* Returns true if the given variable exists and is a string.
*/
bool hasString(const std::string &key) const;
/**
* Sets the given variable to the given floating-point, if it isn't already
* set.
*/
void setFloat(const std::string &key, double value) throw (BadEvent);
/**
* Returns the given variable if it is set and a floating-point.
*/
double getFloat(const std::string &key) const throw (BadEvent);
/**
* Returns the given variable if it is set and a floating-point, returning
* the given default otherwise.
*/
inline double getFloat(const std::string &key, float defaultValue) const
{ try { return getFloat(key); } catch (BadEvent) { return defaultValue; }}
/**
* Returns true if the given variable exists and is a floating-point.
*/
bool hasFloat(const std::string &key) const;
/**
* Sets the given variable to the given boolean, if it isn't already set.
*/
void setBool(const std::string &key, bool value) throw (BadEvent);
/**
* Returns the given variable if it is set and a boolean.
*/
bool getBool(const std::string &key) const throw (BadEvent);
/**
* Returns the given variable if it is set and a boolean, returning the
* given default otherwise.
*/
inline bool getBool(const std::string &key, bool defaultValue) const
{ try { return getBool(key); } catch (BadEvent) { return defaultValue; }}
/**
* Returns true if the given variable exists and is a boolean.
*/
bool hasBool(const std::string &key) const;
/**
* Sends this event to all classes listening to the given channel.
*/
inline void trigger(const std::string &channel) const
{ trigger(channel, *this); }
/**
* Sends the given event to all classes listening to the given channel.
*/
static void trigger(const std::string &channel, const Event &event);
/**
* Sends an empty event with the given name to all classes listening to the
* given channel.
*/
static inline void trigger(const std::string& channel,
const std::string& name)
{ trigger(channel, Mana::Event(name)); }
protected:
friend class Listener;
/**
* Binds the given listener to the given channel. The listener will receive
* all events triggered on the channel.
*/
static void bind(Listener *listener, const std::string &channel);
/**
* Unbinds the given listener from the given channel. The listener will no
* longer receive any events from the channel.
*/
static void unbind(Listener *listener, const std::string &channel);
/**
* Unbinds the given listener from all channels.
*/
static void remove(Listener *listener);
private:
static ListenMap mBindings;
std::string mEventName;
VariableMap mData;
};
} // namespace Mana
#endif
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