/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  ?Description

*

*/

//debug

#include <qdatetime.h>

#include "calendarui_debug.h"

#include "calendateutils.h"

#include <agendautil.h>

//  LOCAL CONSTANTS AND MACROS

const int KDefaultStartTime(8);    // 8 am ( 0 to 23 hour scale)

// ============================ MEMBER FUNCTIONS ==============================

// ============================  CalenDateUtils  ==============================

// -----------------------------------------------------------------------------

// ?classname::?member_function

// ?implementation_description

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 bool CalenDateUtils::onSameDay( const QDateTime& x, const QDateTime& y )

    {

    return x.date().year()  == y.date().year() 

        && x.date().month() == y.date().month()

        && x.date().day()   == y.date().day();

    }

// -----------------------------------------------------------------------------

// ?classname::?member_function

// ?implementation_description

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 bool CalenDateUtils::onSameMonth( const QDateTime& x, const QDateTime& y )

    {

    return ( x.date().year() == y.date().year() && x.date().month() == y.date().month() );

    }

// -----------------------------------------------------------------------------

// ?classname::?member_function

// ?implementation_description

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::beginningOfDay( const QDateTime& startTime )

    {    

    QTime zeroTime(0,0,0,0);

    QDateTime ret(startTime.date(), zeroTime);

    return ret;

    }

// -----------------------------------------------------------------------------

// ?classname::?member_function

// ?implementation_description

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::displayTimeOnDay( const QDateTime& startTime,

                                                 const QDateTime& day )

    {

    if( ! onSameDay( startTime, day ) )

        {

        return beginningOfDay( day );

        }

    else 

        {

        return startTime;

        }

    }

// -----------------------------------------------------------------------------

// ?classname::?member_function

// ?implementation_description

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 bool CalenDateUtils::timeRangesIntersect( const QDateTime& xStart,

                                                    const QDateTime& xEnd,

                                                    const QDateTime& yStart,

                                                    const QDateTime& yEnd )

    {

    return (! ( yEnd <=  xStart || xEnd <= yStart )

        || (xStart == xEnd && yStart <= xStart && xStart < yEnd)

        || (yStart == yEnd && xStart <= yStart && yStart < xEnd)

        || (xStart == xEnd && yStart == yEnd && xStart == yStart));

    }

// -----------------------------------------------------------------------------

// ?classname::?member_function

// ?implementation_description

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 bool CalenDateUtils::isValidDay( const QDateTime& time )

    {

    // Interim API supports range from 1900-2100, 

    return ( minTime() <= time && time <= maxTime() );

    }

// -----------------------------------------------------------------------------

// ?classname::?member_function

// ?implementation_description

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::limitToValidTime( const QDateTime& time )

    {    

    QDateTime valid = time;

    valid = valid > maxTime() ? maxTime() : valid;

    valid = valid < minTime() ? minTime() : valid;

    return valid;

    }

// -----------------------------------------------------------------------------

// ?classname::?member_function

// Returns maximum time allowed, 31.12.2100 0:00 is max so 30.12.2100 is last actual

// date to be used.

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::maxTime()

    { 

    return AgendaUtil::maxTime();

    }

// -----------------------------------------------------------------------------

// ?classname::?member_function

// Returns minimum time allowed, 1.1.1900 0:00 is min

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::minTime()

    {

    return AgendaUtil::minTime();

    }

// -----------------------------------------------------------------------------

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 int CalenDateUtils::timeOfDay( const QDateTime& dateTime )

    {    

    QDateTime midnight = beginningOfDay( dateTime );

    int resultInSec = midnight.secsTo(dateTime);

    return (resultInSec/60);

    }

// -----------------------------------------------------------------------------

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::roundToPreviousHour( const QDateTime& dateTime ) 

    {

    QTime time = dateTime.time();

    time.setHMS(time.hour(),0,0,0);

    return QDateTime( dateTime.date(), time );

    }

// -----------------------------------------------------------------------------

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 int CalenDateUtils::roundToPreviousHour( const int& minutes )

    {

    return ( (minutes / 60) * 60 );

    }

// -----------------------------------------------------------------------------

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::now()

    {

    return QDateTime::currentDateTime();

    }

// -----------------------------------------------------------------------------

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::today()

    {

    return CalenDateUtils::beginningOfDay( now() );

    }

// -----------------------------------------------------------------------------

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 bool CalenDateUtils::isOnToday( const QDateTime& time )

    {

    return CalenDateUtils::onSameDay( time, today() );

    }

// -----------------------------------------------------------------------------

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

 QDateTime CalenDateUtils::defaultTime( const QDateTime& date )

    {

    QDateTime dateTime;

    // DD:MM:YY @ hh:mm:ss

    dateTime = CalenDateUtils::beginningOfDay( date ); 

    // DD:MM:YY @ 00:00:00

    QTime time(KDefaultStartTime, 0, 0, 0);

    dateTime.setTime(time); // DD:MM:YY @ 08:00 am

    return dateTime;

    }      

 // -----------------------------------------------------------------------------

 // (other items were commented in a header).

 // -----------------------------------------------------------------------------

 //

 QDateTime CalenDateUtils::futureOf(const QDateTime& dateTime, int numOfDays)

     {

     QDateTime result;

     int dayNumber = dateTime.date().day();

     int numOfDaysInMonth = dateTime.date().daysInMonth();

     int month = dateTime.date().month();

     int year = dateTime.date().year();

     int buff = numOfDays;

     QDate date(year, month, dayNumber);

     while(dayNumber + buff > numOfDaysInMonth)

         {

         if(month == 12) {

         // If December,

         month = 1; // January

         year++;

         }

         else {

         month++;

         }

         // Create the qdate with these details

         date.setDate(year, month, 1);

         // check to see if it goes beyond the next month also

         buff = buff - (numOfDaysInMonth - dayNumber);

         dayNumber = 0;

         numOfDaysInMonth = date.daysInMonth();

         }

     // Add the buff days to the day number to get the result

     int day = dayNumber + buff;

     date.setYMD(date.year(), date.month(), day);

     result.setDate(date);

     result.setTime(dateTime.time());

     return result;

     }

// End of File