<?php
class TestAnswer {
    private $id = NULL;
    private $type = "TestAnswer";
    private $name = "Test Answer";
    private $test;
    private $examinee;
    private $begin;
    private $end;
    private $chapter = 0;
    private $last_page = -1;
    private $current_page = 0;
    
    function __construct($id = NULL) {
        if ($id) {
            $data = $this->load($id);
        }
    }
    
    function load($id) {
        if (is_numeric($id)) {
            $data = query_row("SELECT * FROM " . DB_PREFIX . "answer WHERE id='{$id}'");
            if ($data) {
                $this->id = $id;
                $this->setExaminee($data->examinee);
                $this->setTest($data->test);
                $this->setBegin($data->begin);
                $this->setEnd($data->end);
                $this->setLastPage($data->last_page);
                $this->setCurrentPage($data->current_page);
                $this->setChapter($data->chapter);
                return $data;
            }
        }
        return false;
    }
    
    function create() {
        $this->setExaminee(get_examinee()->getId());
        $insert = query_insert("INSERT INTO " . DB_PREFIX . "answer (test, examinee, begin) values (".$this->getTest().", ".$this->getExaminee().", NOW() )");
        return $insert;
    }
    
    function createChapter($chap) {
        $this->setExaminee(get_examinee()->getId());
        $insert = query_insert("INSERT INTO " . DB_PREFIX . "chapter (answer, examinee, chapter) values (".$this->getId().", ".$this->getExaminee().", ".$chap.")");
        return $insert;
    }
    
    function hasChapter($chap) {
        $examinee = get_examinee()->getId();
        $q = query_row("SELECT * FROM " . DB_PREFIX . "chapter WHERE !locked AND examinee=".$examinee." AND chapter=".$chap." AND answer=".$this->getId());
        if ($q) return true;
        return false;
    }
    
    function closeChapter() {
        if (get_examinee()->getId()==$this->examinee) {
            return query_update("UPDATE " . DB_PREFIX . "chapter SET locked=1 WHERE chapter=".$this->chapter." AND answer=".$this->getId()." AND examinee=".$this->examinee);
        }
        return false;
    }
    
    function stop() {
        if (get_examinee()->getId()==$this->examinee) {
            return $update = query_update("UPDATE " . DB_PREFIX . "answer SET end=NOW() WHERE id=".$this->getId());
        }
        return false;
    }
    
    function nextChapter($chap) {
        if ($chap != $this->getChapter() && get_examinee()->getId()==$this->examinee) {
            return $update = query_update("UPDATE " . DB_PREFIX . "answer SET chapter=".$chap." WHERE id=".$this->getId());
        }
        return false;
    }
    
    function resetChapter() {
        if (get_examinee()->getId()==$this->examinee) {
            $this->closeChapter();
            return $update = query_update("UPDATE " . DB_PREFIX . "answer SET chapter=NULL, last_page=-1, current_page=0 WHERE id=".$this->getId());
        }
    }
    
    function nextPage() {
        if (get_examinee()->getId()==$this->examinee) {
            return $update = query_update("UPDATE " . DB_PREFIX . "answer SET last_page=last_page+1, current_page=current_page+1 WHERE id=".$this->getId());
        }
        return false;
    }
    
    
    
    function delete() {
        if (is_numeric($this->getId()) && $this->getId() > 0) {
            if (is_admin()) {
                return query("DELETE FROM " . DB_PREFIX . "answer WHERE id=".$this->getId());
            }
        }
        return false;
    }
    
    public function getId() {
        return $this->id;
    }
    
    public function getType() {
        return $this->type;
    }
    
    public function getName() {
        return $this->name;
    }
    
    function getExaminee() {
        return $this->examinee;
    }
    
    function setExaminee($examinee) {
        $this->examinee = $examinee;
    }
    
    public function getTest() {
        return $this->test;
    }
    
    function setTest($test) {
        $this->test = $test;
    }
    
    public function getBegin() {
        return $this->begin;
    }
    
    function setBegin($begin) {
        $this->begin = $begin;
    }
    
    public function getEnd() {
        return $this->end;
    }
    
    function setEnd($end) {
        $this->end = $end;
    }
    
    public function getLastPage() {
        return $this->last_page;
    }
    
    function setLastPage($last_page) {
        $this->last_page = $last_page;
    }
    
    public function getCurrentPage() {
        return $this->current_page;
    }
    
    function setCurrentPage($current_page) {
        $this->current_page = $current_page;
    }
    
    public function getChapter() {
        return $this->chapter;
    }
    
    function setChapter($chap) {
        $this->chapter = $chap;
    }
    
}
?>