NotificationQueue.h

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/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   License notice:
 *
 *   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 (at your option) 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, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Damian 'Mozork' Frick
 *   Co-authors:
 *      ...
 *
 */

#ifndef _NotificationOueue_H__
#define _NotificationOueue_H__

#include "notifications/NotificationsPrereqs.h"

#include <ctime>
#include <set>
#include <string>
#include <vector>

#include "NotificationManager.h"

#include "core/BaseObject.h"
#include "tools/interfaces/Tickable.h"
#include "network/synchronisable/Synchronisable.h"

namespace orxonox
{

    struct NotificationContainer
    {
        Notification* notification; 
        time_t time; 
    };

    struct NotificationContainerCompare {
        bool operator() (const NotificationContainer* const & a, const NotificationContainer* const & b) const
            { return a->time < b->time; } 
    };

    class _NotificationsExport NotificationQueue : public BaseObject, public Tickable, public Synchronisable
    {

        public:
            NotificationQueue(Context* context);
            virtual ~NotificationQueue();

            virtual void tick(float dt) override; // To update from time to time.
            virtual void XMLPort(Element& xmlelement, XMLPort::Mode mode) override;

            virtual void changedName(void) override;
            
            void update(void); // Updates the NotificationQueue.
            void update(Notification* notification, const std::time_t & time); // Updates the NotificationQueue by adding an new Notification.

            // tolua_begin
            inline const std::string& getName(void) const
                { return this->BaseObject::getName(); }

            void setMaxSize(unsigned int size); // Sets the maximum number of displayed Notifications.
            inline unsigned int getMaxSize(void) const
                { return this->maxSize_; }

            void setDisplayTime(int time); // Sets the maximum number of seconds a Notification is displayed.
            inline int getDisplayTime(void) const
                { return this->displayTime_; }
            // tolua_end
            void maxSizeChanged(void); // Is called when the maximum number of displayed Notifications has changed.
            void displayTimeChanged(void);

            inline unsigned int getSize(void) const
                { return this->size_; }

            inline const std::set<std::string> & getTargetsSet(void)
                { return this->targets_; }

            void setTargets(const std::string & targets); // Set the targets of this NotificationQueue.
            const std::string& getTargets(void) const; // Returns a string consisting of the concatenation of the targets.
            void targetsChanged(void); // Is called when the NotificationQueue's targets have changed.

            inline bool isRegistered(void)
                { return this->registered_; }

            bool tidy(void); // Pops all Notifications from the NotificationQueue.
            
        protected:
            void registerVariables();
            
            virtual void notificationPushed(Notification* notification) {}
            virtual void notificationPopped(void) {}
            virtual void notificationRemoved(unsigned int index) {}
            
            virtual void clear(bool noGraphics = false); // Clears the NotificationQueue by removing all NotificationContainers.

        protected:
            static const unsigned int DEFAULT_SIZE = 5; 
            static const unsigned int DEFAULT_DISPLAY_TIME = 30; 
            static const int INF = -1; 

            virtual void create(void); // Creates the NotificationQueue.

        private:
            time_t creationTime_; 
            
            unsigned int maxSize_; 
            unsigned int size_; 
            int displayTime_; 

            bool registered_; 

            std::set<std::string> targets_; 

            std::multiset<NotificationContainer*, NotificationContainerCompare> ordering_; 
            std::vector<NotificationContainer*> notifications_; 

            float tickTime_; 
            NotificationContainer timeLimit_; 

            void setName(const std::string& name); 

            void push(Notification* notification, const std::time_t & time); // Adds (pushes) a Notification to the NotificationQueue.
            void pop(void); // Removes (pops) the least recently added Notification form the NotificationQueue.
            void remove(const std::multiset<NotificationContainer*, NotificationContainerCompare>::iterator& containerIterator); // Removes the Notification that is stored in the input NotificationContainer.

    };

}

#endif /* _NotificationQueue_H__ */