<?php
/**
 * class.calendar.php
 * @package    workflow.engine.classes
 *
 * ProcessMaker Open Source Edition
 * Copyright (C) 2004 - 2011 Colosa Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information, contact Colosa Inc, 2566 Le Jeune Rd.,
 * Coral Gables, FL, 33134, USA, or email info@colosa.com.
 *
 *
 *
 * @name calendar
 * created 2010-03-22
 *
 * @author Hugo Loza <hugo@colosa.com> 2010-03-22 * 
 */
   
  require_once ( "classes/model/CalendarDefinition.php" );
  
/**
 * A Calendar object where it is defined Working Days, Business Hours and Holidays
 * A Calendar is applied to a User, Process or Task
 * Extends CalendarDefinition.
 * 
 * @author Hugo Loza <hugo@colosa.com> 2010-03-22
 * @uses CalendarDefinition
 * @package    workflow.engine.classes
 *
 */
class calendar extends CalendarDefinition
{
  /**
   * @param string(32) $userUid
   * @param string(32) $proUid
   * @param string(32) $tasUid
   */
  function calendar($userUid = NULL, $proUid = NULL, $tasUid = NULL)
  {
    $this->userUid     = $userUid;
    $this->proUid      = $proUid;
    $this->tasUid      = $tasUid;    
    $this->calendarLog = "";
    $this->setupCalendar($userUid,$proUid,$tasUid);
  }
  
  /**
   * Small function used to add important information about the calcs and actions
   * to the log (that log will be saved)
   * 
   * @name addCalendarLog
   * @param  text $msg
   * @access public
   * 
   */
  function addCalendarLog($msg)
  {
    $this->calendarLog .= "\n".date("D M j G:i:s T Y").": " . $msg;
  }
  
  /**
   * setupCalendar is used to generate a valid instance of calendar using $userUid, $proUid and $tasUid
   * to find a valid calendar. If there is no valid calendar then use the Default
   *
   * @name setupCalendar
   * @param string(32) $userUid
   * @param string(32) $proUid
   * @param string(32) $tasUid
   * @return void
   */
  function setupCalendar($userUid,$proUid,$tasUid)
  {
    $calendarDefinition       = $this->getCalendarFor($userUid,$proUid,$tasUid);
    $this->calendarUid        = $calendarDefinition['CALENDAR_UID'];
    $this->calendarDefinition = $calendarDefinition;
  }
  /**
   * getnextValidBusinessHoursrange is used recursivily to find a valid BusinessHour
   * for the given $date and $time. This function use all the exeptions defined for 
   * Working days, Business Hours and Holidays.
   * 
   * @author Hugo Loza <hugo@colosa.com>
   * @name getNextValidBusinessHoursRange
   * @param date $date
   * @param time $time
   * 
   * @var array $businessHoursA Object with all the infromation about the valid Business Hours found
   * $return array('DATE'=>$date,'TIME'=>$time,'BUSINESS_HOURS'=>$businessHoursA)
   */
  function getNextValidBusinessHoursRange($date, $time)
  {
    $this->addCalendarLog("================= Start : $date,$time ================");
  
    //First Validate if is a valid date
    $sw_valid_date   = false;
    $sw_date_changed = false;
    while (!$sw_valid_date) {
      $dateArray    = explode("-",$date);
      $hour         = 0;
      $minute       = 0;
      $second       = 0;
      $month        = $dateArray[1];
      $day          = $dateArray[2];
      $year         = $dateArray[0];
      $weekDay      = date("w",mktime($hour,$minute,$second,$month,$day,$year));
      $weekDayLabel = date("l",mktime($hour,$minute,$second,$month,$day,$year));
      $dateInt      = mktime($hour,$minute,$second,$month,$day,$year);
      
      
      $this->addCalendarLog("**** $weekDayLabel ($weekDay) * $date");
      $sw_week_day    = false;
      $sw_not_holiday = true;
      
    
      if(in_array($weekDay,$this->calendarDefinition['CALENDAR_WORK_DAYS_A'])){
        $sw_week_day = true;
      }
      if(!$sw_week_day){
        $this->addCalendarLog("Valid working Dates: ".$this->calendarDefinition['CALENDAR_WORK_DAYS_A']);
        $this->addCalendarLog("- Non working Day");
      }
    
    
      foreach ($this->calendarDefinition['HOLIDAY'] as $key => $holiday) {
        //Normalize Holiday date to SAME year of date

        $holidayStartA = explode(" ",$holiday['CALENDAR_HOLIDAY_START']);
        $holidayStartA = explode("-",$holidayStartA[0]);
        
        $normalizedHolidayStart    = date("Y-m-d",mktime($hour,$minute,$second,$holidayStartA[1],$holidayStartA[2],$year));
        $normalizedHolidayStartInt = mktime($hour,$minute,$second,$holidayStartA[1],$holidayStartA[2],$year);
        
        $holidayEndA               = explode(" ",$holiday['CALENDAR_HOLIDAY_END']);
        $holidayEndA               = explode("-",$holidayEndA[0]);
        $normalizedHolidayEnd      = date("Y-m-d",mktime($hour,$minute,$second,$holidayEndA[1],$holidayEndA[2],$year));
        $normalizedHolidayEndInt   = mktime($hour,$minute,$second,$holidayEndA[1],$holidayEndA[2],$year);
        $sw_not_holiday_aux = true;
        if( $dateInt >= $normalizedHolidayStartInt && $dateInt <= $normalizedHolidayEndInt ){
          $sw_not_holiday     = false;
          $sw_not_holiday_aux = false;
        }
        if(!$sw_not_holiday_aux){
          $this->addCalendarLog("It is a holiday -> ".$holiday['CALENDAR_HOLIDAY_NAME']." ($normalizedHolidayStart - $normalizedHolidayEnd)");
        }
      }
      $sw_valid_date=$sw_week_day && $sw_not_holiday;
    
      if(!$sw_valid_date){//Go to next day
        $date=date("Y-m-d",mktime($hour,$minute+1,$second,$month,$day+1,$year));
        $sw_date_changed=true;
      }else{
          $this->addCalendarLog("FOUND VALID DATE -> $date");

    
        //We got a valid day, now get the valid Business Hours
        //Here Need to find a rule to get the most nea
        $businessHoursA=array();
        $prevHour="00:00";
        
        if($sw_date_changed){// If date has changed then Use the first available period
          $time="00:01";
        }
        
        foreach($this->calendarDefinition['BUSINESS_DAY'] as $keyBH => $businessHours){
          
          // First the period may correspond to ALL or to the current week day
          if(($businessHours['CALENDAR_BUSINESS_DAY']==7)||($businessHours['CALENDAR_BUSINESS_DAY']==$weekDay)){
              $this->addCalendarLog("Validating ($time/$prevHour) From: ".$businessHours['CALENDAR_BUSINESS_START']." to ".$businessHours['CALENDAR_BUSINESS_END']);
                
                //Prev Hour          
                $prevHourA       = explode(":",$prevHour);
                $prevHourSeconds = ($prevHourA[0]*60*60)+($prevHour[1]*60);
                
                $calendarBusinessStartA       = explode(":",$businessHours['CALENDAR_BUSINESS_START']);
                $calendarBusinessStartSeconds = ($calendarBusinessStartA[0]*60*60)+($calendarBusinessStartA[1]*60);
                
                $calendarBusinessEndA       = explode(":",$businessHours['CALENDAR_BUSINESS_END']);
                $calendarBusinessEndSeconds = ($calendarBusinessEndA[0]*60*60)+($calendarBusinessEndA[1]*60);
                
                $timeAuxA       = explode(":",$time);
                $timeAuxSeconds = ($timeAuxA[0]*60*60)+($timeAuxA[1]*60);
              
                if(($timeAuxSeconds>=$prevHourSeconds)&&($timeAuxSeconds<$calendarBusinessEndSeconds)){
                  $this->addCalendarLog("*** FOUND VALID BUSINESS HOUR ".$businessHours['CALENDAR_BUSINESS_START']." - ".$businessHours['CALENDAR_BUSINESS_END']);
          
                  if($timeAuxSeconds<$calendarBusinessStartSeconds){//Out of range then assign first hour
                    $this->addCalendarLog("Set to default start hour to: ".$businessHours['CALENDAR_BUSINESS_START']);
                    $time = $businessHours['CALENDAR_BUSINESS_START'];
                  }
                  $prevHour       = $businessHours['CALENDAR_BUSINESS_END'];
                  $businessHoursA = $businessHours;
                }
                
              
              
            }
        }
      }
      
      if(empty($businessHoursA)){
        $this->addCalendarLog("> No Valid Business Hour found for current date, go to next");
        $date            = date("Y-m-d", mktime($hour,$minute+1,$second,$month,$day+1,$year));
        $sw_date_changed = true;
        $sw_valid_date   = false;
      }
    
      
    }
    

    $return['DATE']           = $date;
    $return['TIME']           = $time;
    $return['BUSINESS_HOURS'] = $businessHoursA;
    
    return $return;          
    }
 
}
?>