<?php

// imports
require_once 'GenericAdmin/DataTypes/EnumType.php';

class ServInfl extends EnumType {

	/** the possible values for attribute service influence */
	const SI_INDEP	= 1; // service independent
	const SI_NONAFF	= 2; // service non affected      
	const SI_AFF	= 3; // service affected
	const SI_THRAFF	= 4; // threshold affected

	// (string representations of) defined values
	public static $defd_vals = array (
		self::SI_INDEP	=> 'serv_indep',
		self::SI_NONAFF	=> 'serv_nonaff',
		self::SI_AFF	=> 'serv_aff',
		self::SI_THRAFF => 'thresh_aff'
	);

	/**
	 * observed value of counter in case of threshold alarm
	 * @var        integer
	 */
	private $obsVal = null;

	/**
	 * constructor: checks validity
	 * 
	 * @param strOrEnum both constructions possible: with string representation or by numeric enumeration value 
	 * @param iniThrCnt initial threshold count only if strOrEnum == self::SI_THRCNT specified
	 */
	function __construct($strOrEnum = self::SI_INDEP, $iniObsVal = null){
		if (is_string($strOrEnum)) {
			$aux_arr = explode (':', $strOrEnum);
			if (count($aux_arr) > 2) {
				throw new Exception("Invalid ServInfl string: $strOrEnum");
			}
		} else {
			$aux_arr[0] = $strOrEnum;
			$aux_arr[1] = $iniObsVal;
		}
		$this->initInstance('ServInfl', self::$defd_vals, $aux_arr[0]);
		if ($this->getValue() == self::SI_THRAFF) {
			if (count($aux_arr) < 2 || $aux_arr[1] == null) {
				throw new Exception("Missing observed value in ServInfl creation");
			}
			$this->obsVal = $aux_arr[1];
		}
	}
	
	function getObsVal(){
		return $this->obsVal;
	}
	
	function __toString(){
		if ($this->obsVal == null) {
			return parent::__toString();
		} else {
			return parent::__toString() . ":" . $this->obsVal;
		}
	}
}