<?php
namespace TestProject;

/*
 * Quiz class
 */
class Quiz extends Item {
	private const tb_str      = 'quiz';
	private const resulTb_str = 'quiz_result';

	private $name_str;
	private $maxScore_int;
	private $questionID_arr;

	/**
	 * Load quiz
	 *
	 * @param int $id_int ID of quiz to load
	 */
	public function __construct( int $id_int ){
		$db = DB::getDB();

		$rows_arr = $db->select( self::tb_str, array(), array( 'id' => $id_int ) );
		if ( empty( $rows_arr ) ){
			throw new \RuntimeException( 'Invalid quiz ID' );
		}

		$this->id_int       = $rows_arr[0]['id'];
		$this->name_str     = $rows_arr[0]['name'];
		$this->maxScore_int = $rows_arr[0]['max_score'];

		$this->questionID_arr = Question::getList( $this->id_int );
	}

	/**
	 * Get a list of quiz IDs and names
	 *
	 * @return string[] Array of quiz names keyed by id
	 */
	public static function getList(){
		$db = DB::getDB();

		$quiz_arr = $db->select( self::tb_str, array( 'id', 'name' ) );

		return $quiz_arr;
	}

	/**
	 * Get name of Quiz
	 *
	 * @return string Name
	 */
	public function getName(){
		return $this->name_str;
	}

	/**
	 * Get Maximum possible Score of quiz
	 *
	 * @return int Max score
	 */
	public function getMaxScore(){
		return $this->maxScore_int;
	}

}