<?php

/**
 * Helper class to load arrays of objects from the database.
 *
 * @author fpvanagthoven
 */
class Loader {

    public static function load($info, $classname) {
        $theArray = array();
        
        foreach ($info as $id => $title)
        {
            $object = new $classname($id, $title);
            array_push($theArray, $object);
        }
        
        return $theArray;
    }

    /**
     *
     * @return array Array of Surveys with id and title
     */
    public static function loadSurveys() {
    
        $surveyDBI = new SurveyCreationDatabaseInterface(null);
        $surveyIDTitles = $surveyDBI->getExistingSurveys();

        return Loader::load($surveyIDTitles, "Survey");
    }

    public static function loadApplications() {
        $applicationDBI = new ApplicationDatabaseInterface(null);
        $applicationTitles = $applicationDBI->getExistingApplications();

        return Loader::load($applicationTitles, "Application");
    }

    public static function loadSessions() {
        $sessionDBI = new SessionCreationDatabaseInterface(null);
        $sessionTitles = $sessionDBI->getExistingSessions();

        return Loader::load($sessionTitles, "Session");
    }

    public static function loadQuestions() {
        $questionDBI = new QuestionCreationDatabaseInterface();
        $questionCodesAndTitles = $questionDBI->getExistingQuestions();

        return Loader::load($questionCodesAndTitles, "Question");
    }
    
    public static function loadFullQuestions() {
        $questionDBI = new QuestionCreationDatabaseInterface();
        $questionCodesAndTitles = $questionDBI->getExistingQuestions();
        
        $questions = array();
        
        foreach ($questionCodesAndTitles as $code => $title) {
            $info = $questionDBI->getQuestionInfo($code);
            $question = Question::getQuestion($code, $info);
            
            array_push($questions, $question);
        }
        
        return $questions;
    }

}

?>