DelayTimer.h

/*
 * Copyright (c) 2015 Pavel Vainerman.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, version 2.1.
 *
 * 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
 * Lesser General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
// --------------------------------------------------------------------------
#ifndef DelayTimer_H_
#define DelayTimer_H_
// --------------------------------------------------------------------------
#include "PassiveTimer.h"
// --------------------------------------------------------------------------
namespace uniset
{
    class DelayTimer
    {
        public:
            DelayTimer() {}
 
            DelayTimer( timeout_t on_msec, timeout_t off_msec ) noexcept:
                onDelay(on_msec), offDelay(off_msec) {}
 
            ~DelayTimer() noexcept {}
 
            inline void set( timeout_t on_msec, timeout_t off_msec ) noexcept
            {
                onDelay = on_msec;
                offDelay = off_msec;
                waiting_on = false;
                waiting_off = false;
                state = false;
            }
 
            // запустить часы (заново)
            inline void reset() noexcept
            {
                pt.reset();
                waiting_on = false;
                waiting_off = false;
                state = false;
            }
 
            inline bool check( bool st ) noexcept
            {
                prevState = st;
 
                if( waiting_off )
                {
                    if( pt.checkTime() )
                    {
                        waiting_off = false;
 
                        if( !st )
                            state = false;
 
                        return state;
                    }
                    else if( st )
                        waiting_off = false;
 
                    return state;
                }
 
                if( waiting_on )
                {
                    if( pt.checkTime() )
                    {
                        waiting_on = false;
 
                        if( st )
                            state = true;
 
                        return state;
                    }
                    else if( !st )
                        waiting_on = false;
 
                    return state;
                }
 
                if( state != st )
                {
                    waiting_on = false;
                    waiting_off = false;
 
                    if( st )
                    {
                        if( onDelay <= 0 )
                        {
                            pt.setTiming(0);
                            state = st;
                            return st;
                        }
 
                        pt.setTiming(onDelay);
                        waiting_on = true;
                    }
                    else
                    {
                        if( offDelay <= 0 )
                        {
                            pt.setTiming(0);
                            state = st;
                            return st;
                        }
 
                        pt.setTiming(offDelay);
                        waiting_off = true;
                    }
                }
 
                return state;
            }
 
            inline bool get() noexcept
            {
                return check(prevState);
            }
 
            inline timeout_t getOnDelay() const noexcept
            {
                return onDelay;
            }
            inline timeout_t getOffDelay() const noexcept
            {
                return offDelay;
            }
 
            inline timeout_t getCurrent() const noexcept
            {
                return pt.getCurrent();
            }
 
            inline bool isWaitingOn() noexcept
            {
                return !get() && waiting_on;
            }
 
            inline bool isWaitingOff() noexcept
            {
                return get() && waiting_off;
            }
 
            inline bool isWaiting() noexcept
            {
                check(prevState);
                return (waiting_off || waiting_on);
            }
 
        protected:
            PassiveTimer pt;
            bool prevState = { false };
            bool state = { false };
            timeout_t onDelay = { 0 };
            timeout_t offDelay = { 0 };
            bool waiting_on = { false };
            bool waiting_off = { false };
    };
    // -------------------------------------------------------------------------
} // end of uniset namespace
// --------------------------------------------------------------------------
#endif
// --------------------------------------------------------------------------