<?php

class Expedition
{
	//*** class members ***
	
	private $expeditionID;
	private $expeditionName;
	private $expeditionStart_YYYYMMDD;
	private $expeditionStart_YYYY;
	private $expeditionStart_MM;
	private $expeditionStart_DD;
	private $expeditionEnd_YYYYMMDD;
	private $expeditionEnd_YYYY;
	private $expeditionEnd_MM;
	private $expeditionEnd_DD;
	private $yearAsInteger; // for date validity check
	private $monthAsInteger; // for date validity check
	private $dayAsInteger; // for date validity check
	private $dateStringLength; // for date validity check
	private $returnString;

	
	//*** class methods ***
	
	//constructor with initialisations
	function __construct() {
		
		$this->expeditionID = 0;
		$this->expeditionName = 'Unnamed expedition';
		$this->expeditionStart_YYYY = 0;
		$this->expeditionStart_MM = 0;
		$this->expeditionStart_DD =  0;
		$this->expeditionEnd_YYYY = 0;
		$this->expeditionEnd_MM = 0;
		$this->expeditionEnd_DD = 0;
		
		}

    // destructor
	function __destruct() {
		
		}
	
	//expedition ID functions
	public function getExpeditionID() {
		
		return $this-> expeditionID ;
		
		}
	
	public function setExpeditionID($new_ExpeditionID) {
		
		$this->expeditionID = $new_ExpeditionID;
		
		}
	
	//expedition name functions
	public function getExpeditionName() {
		
		return $this-> expeditionName ;
		
		}
	
	public function setExpeditionName($new_ExpeditionName) {
		
		$this->expeditionName = $new_ExpeditionName;
		
		}
		

	//*********************** START date functions ************************
	
	//expeditionStart (date) get-functions
	
	public function getExpeditionStart_YYYYMMDD() {
		
		return $this-> expeditionStart_YYYYMMDD ;
		
		}
		
	public function getExpeditionStart_YYYY() {
		
		return $this-> expeditionStart_YYYY ;
		
		}
		
	public function getExpeditionStart_MM() {
		
		return $this-> expeditionStart_MM ;
		
		}
		
	public function getExpeditionStart_DD() {
		
		return $this-> expeditionStart_DD ;
		
		}
	
	//expeditionStart (date) set-function
	//operates on the date as a whole.
	 public function setExpeditionStart_YYYYMMDD($new_ExpeditionStart_YYYYMMDD) {
		
		//first some checks for date validity
		//mind the type-casts, as the checkdate() function requires integers
		$this->dateStringLength = strlen($new_ExpeditionStart_YYYYMMDD);
		$this->yearAsInteger = (int) substr($new_ExpeditionStart_YYYYMMDD,0,4);
		$this->monthAsInteger = (int) substr($new_ExpeditionStart_YYYYMMDD,4,2);
		$this->dayAsInteger = (int) substr($new_ExpeditionStart_YYYYMMDD,6,2);
		
		if ($this->dateStringLength > 8) {
			
			// string too long
			
			$this->returnString = "ERROR : given string is longer than 8 characters. 
			Expedition start date should be given in the format YYYYMMDD, without 
			separation characters or blanks. / Given string was :   
			$new_ExpeditionStart_YYYYMMDD";
		
			} 
			elseif (checkdate($this->monthAsInteger,
			$this->dayAsInteger, $this->yearAsInteger) == FALSE) {
				
				//date not valid
				
				$this->returnString ="ERROR : given date is not valid. Expedition start date should be 
				given in the format YYYYMMDD. The year should be between 1 and 32767 inclusive.
				Month should be between 1 and 12 inclusive.	
				Day should be within allowed number of days for the given month.
				Leap years are taken into account. 
				/ Given string was : $new_ExpeditionStart_YYYYMMDD";
				
				
				} 
				
				else {
					
					// no problems : date is accepted					
					$this->expeditionStart_YYYY = (string) $this->yearAsInteger;
					$this->expeditionStart_MM = (string) $this->monthAsInteger;
					$this->expeditionStart_DD = (string) $this->dayAsInteger;
					$this->expeditionStart_YYYYMMDD = (string) $new_ExpeditionStart_YYYYMMDD;

				$this->returnString = "Expedition start date set to" . $this->expeditionStart_YYYYMMDD;
					
					
					}
					
			
		
		return ($this->returnString);
		
		} 
	
	
	//*********************** END date functions ************************
	
	//expeditionEnd (date) get-functions
	//get functions operate on the separate
	//parts of the date (YYYY or MM or DD).
	public function getExpeditionEnd_YYYY() {
		
		return $this-> expeditionEnd_YYYY ;
		
		}
		
	public function getExpeditionEnd_MM() {
		
		return $this-> expeditionEnd_MM ;
		
		}
		
	public function getExpeditionEnd_DD() {
		
		return $this-> expeditionEnd_DD ;
		
		}
	
	//expeditionEnd (date) set-function
	//operates on the date as a whole.
	 public function setExpeditionEnd_YYYYMMDD($new_ExpeditionEnd_YYYYMMDD) {
		
		//first some checks for date validity
		//mind the type-casts, as the checkdate() function requires integers
		$this->dateStringLength = strlen($new_ExpeditionEnd_YYYYMMDD);
		$this->yearAsInteger = (int) substr($new_ExpeditionEnd_YYYYMMDD,0,4);
		$this->monthAsInteger = (int) substr($new_ExpeditionEnd_YYYYMMDD,4,2);
		$this->dayAsInteger = (int) substr($new_ExpeditionEnd_YYYYMMDD,6,2);
		
		if ($this->dateStringLength > 8) {
			
			// string too long
			
			$this->returnString = "ERROR : given string is longer than 8 characters. 
			Expedition start date should be given in the format YYYYMMDD, without 
			separation characters or blanks. / Given string was :   
			$new_ExpeditionEnd_YYYYMMDD";
		
			} 
			elseif (checkdate($this->monthAsInteger,
			$this->dayAsInteger, $this->yearAsInteger) == FALSE) {
				
				//date not valid
				
				$this->returnString ="ERROR : given date is not valid. Expedition start date should be 
				given in the format YYYYMMDD. The year should be between 1 and 32767 inclusive.
				Month should be between 1 and 12 inclusive.	
				Day should be within allowed number of days for the given month.
				Leap years are taken into account. 
				/ Given string was : $new_ExpeditionEnd_YYYYMMDD";
				
				
				} 
				
				else {
					
					// no problems : date is accepted
					
					$this->expeditionEnd_YYYY = $this->yearAsInteger;
					$this->expeditionEnd_MM = $this->monthAsInteger;
					$this->expeditionEnd_DD = $this->dayAsInteger;
					$this->expeditionEnd_YYYYMMDD = $new_ExpeditionEnd_YYYYMMDD;
				$this->returnString = "Expedition end date set to $this->expeditionEnd_YYYYMMDD";
					
					
					}
					
			
		
		return ($this->returnString);
		
		} 

}

?>