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<?php

require_once __DIR__."/../model/SwagPostItem.php";
require_once __DIR__."/../utils/H5pUtil.php";

/**
 * A H5P swagifact.
 */
class H5pSwagifact extends SwagPostItem {

    /**
     * Override the completion check.
     */
    public function isCompleted($swagUser) {
        $slug=$this->parameters["slug"];
        $h5pId=H5pUtil::getH5pIdBy("slug",$slug);
        $h5p=H5pUtil::getH5pById($h5pId);
        $h5pParameters=json_decode($h5p["parameters"],TRUE);

        $scoreElements=array(
            "H5P.MultiChoice",
            "H5P.SingleChoiceSet"
        );

        $requireComplete=FALSE;

        if (!$h5pParameters)
            throw new Exception("h5p not found or no parameters!");

        $numSlides=0;
        if (isset($h5pParameters["presentation"]["slides"])) {
            $numSlides=sizeof($h5pParameters["presentation"]["slides"]);

            foreach ($h5pParameters["presentation"]["slides"] as $slide) {
                foreach ($slide["elements"] as $element) {
                    $library=$element["action"]["library"];
                    $parts=explode(" ",$library);
                    $libraryName=$parts[0];
                    if (in_array($libraryName,$scoreElements))
                        $requireComplete=TRUE;
                }
            }
        }

        $objectUrl=$this->getObjectUrl();

        foreach ($this->swagPost->getRelatedStatements($swagUser) as $statement) {
            if ($statement["object"]["id"]==$objectUrl) {
                if ($statement["verb"]["id"]=="http://adlnet.gov/expapi/verbs/completed") {
                    if ($statement["result"]["score"]["scaled"]==1)
                        return TRUE;
                }

                if ($statement["verb"]["id"]=="http://adlnet.gov/expapi/verbs/progressed"
                        && !$requireComplete) {
                    $ext=$statement["object"]["definition"]["extensions"];
                    $endingPoint=$ext["http://id.tincanapi.com/extension/ending-point"];

                    //error_log("slug: ".$slug." ep: ".$endingPoint." ns: ".$numSlides);

                    if ($endingPoint && $numSlides && $endingPoint>=$numSlides)
                        return TRUE;
                }
            }
        }

        return FALSE;
    }
}