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<?php //phpcs:ignore WordPress.Files.FileName.InvalidClassFileNam

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use Automattic\Jetpack\Assets;

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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/**

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* Quiz shortcode.

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* Usage:

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* [quiz]

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* [question]What's the right answer?[/question]

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* [wrong]This one?[explanation]Nope[/explanation][/wrong]

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* [answer]Yes, this is the one![explanation]Yay![/explanation][/answer]

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* [wrong]Maybe this one[explanation]Keep trying[/explanation][/wrong]

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* [wrong]How about this one?[explanation]Try again[/explanation][/wrong]

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* [/quiz]

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* Can also be wrapped in [quiz-wrapper] to display all quizzes together.

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class Quiz_Shortcode {

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/**

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* Parameters admitted by [quiz] shortcode.

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* @since 4.5.0

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* @var array

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private static $quiz_params = array();

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/**

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* Whether the [quiz-wrapper] shortcode is used.

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* @since 10.1

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* @var bool

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private static $quiz_wrapper = false;

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/**

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* Whether the scripts were enqueued.

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* @since 4.5.0

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* @var bool

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private static $scripts_enqueued = false;

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/**

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* In a8c training, store user currently logged in.

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* @since 4.5.0

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* @var null

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private static $username = null;

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/**

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* Whether the noscript tag was already printed.

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* @since 4.5.0

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* @var bool

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private static $noscript_info_printed = false;

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/**

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* Whether JavaScript is available.

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* @since 4.5.0

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* @var null

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private static $javascript_unavailable = null;

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/**

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* Register all shortcodes.

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* @since 4.5.0

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public static function init() {

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add_shortcode( 'quiz-wrapper', array( __CLASS__, 'shortcode_wrapper' ) );

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add_shortcode( 'quiz', array( __CLASS__, 'shortcode' ) );

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add_shortcode( 'question', array( __CLASS__, 'question_shortcode' ) );

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add_shortcode( 'answer', array( __CLASS__, 'answer_shortcode' ) );

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add_shortcode( 'wrong', array( __CLASS__, 'wrong_shortcode' ) );

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add_shortcode( 'explanation', array( __CLASS__, 'explanation_shortcode' ) );

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}

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/**

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* Enqueue assets needed by the quiz,

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* @since 4.5.0

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private static function enqueue_scripts() {

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wp_enqueue_style( 'quiz', plugins_url( 'css/quiz.css', __FILE__ ), array(), JETPACK__VERSION );

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wp_enqueue_script(

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'quiz',

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Assets::get_file_url_for_environment( '_inc/build/shortcodes/js/quiz.min.js', 'modules/shortcodes/js/quiz.js' ),

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array( 'jquery' ),

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JETPACK__VERSION,

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true

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);

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}

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/**

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* Check if this is a feed and thus JS is unavailable.

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* @since 4.5.0

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* @return bool|null

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private static function is_javascript_unavailable() {

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if ( self::$javascript_unavailable !== null ) {

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return self::$javascript_unavailable;

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}

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if ( is_feed() ) {

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self::$javascript_unavailable = true;

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return self::$javascript_unavailable;

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}

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self::$javascript_unavailable = false;

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return self::$javascript_unavailable;

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}

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/**

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* Display message when JS is not available.

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* @since 4.5.0

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* @return string

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private static function noscript_info() {

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if ( self::$noscript_info_printed ) {

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return '';

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}

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self::$noscript_info_printed = true;

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return '<noscript><div><i>' . esc_html__( 'Please view this post in your web browser to complete the quiz.', 'jetpack' ) . '</i></div></noscript>';

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}

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/**

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* Check if we're in WordPress.com.

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* @since 4.5.0

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* @return bool

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public static function is_wpcom() {

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return defined( 'IS_WPCOM' ) && IS_WPCOM;

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}

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/**

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* Parse shortcode arguments and render its output.

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* @since 4.5.0

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* @param array $atts Shortcode parameters.

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* @param string $content Content enclosed by shortcode tags.

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* @return string

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public static function shortcode( $atts, $content = null ) {

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// There's nothing to do if there's nothing enclosed.

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if ( empty( $content ) ) {

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return '';

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}

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$id = '';

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if ( self::is_javascript_unavailable() ) {

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// in an e-mail print the question and the info sentence once per question, too.

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self::$noscript_info_printed = false;

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} else {

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if ( ! self::$scripts_enqueued ) {

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// lazy enqueue cannot use the wp_enqueue_scripts action anymore.

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self::enqueue_scripts();

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self::$scripts_enqueued = true;

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}

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$default_atts = self::is_wpcom()

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? array(

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'trackid' => '',

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'a8ctraining' => '',

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)

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: array(

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'trackid' => '',

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);

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self::$quiz_params = shortcode_atts( $default_atts, $atts );

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if ( ! empty( self::$quiz_params['trackid'] ) ) {

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$id .= ' data-trackid="' . esc_attr( self::$quiz_params['trackid'] ) . '"';

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}

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if ( self::is_wpcom() && ! empty( self::$quiz_params['a8ctraining'] ) ) {

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if ( self::$username === null ) {

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self::$username = wp_get_current_user()->user_login;

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}

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$id .= ' data-a8ctraining="' . esc_attr( self::$quiz_params['a8ctraining'] ) . '" data-username="' . esc_attr( self::$username ) . '"';

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}

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}

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$quiz = self::do_shortcode( $content );

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$quiz_options = '';

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if ( self::$quiz_wrapper ) {

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$quiz_options = '<div class="jetpack-quiz-options">

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</div>';

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}

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return '<div class="jetpack-quiz quiz"' . $id . '>' . $quiz . $quiz_options . '</div>';

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}

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/**

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* Wrap shortcode contents.

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* @since 10.1

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* @param array $atts Shortcode parameters.

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* @param string $content Content enclosed by shortcode tags.

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* @return string

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public static function shortcode_wrapper( $atts, $content = null ) {

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self::$quiz_wrapper = true;

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return '<div class="jetpack-quiz-wrapper">' . self::do_shortcode( $content ) . '</div>';

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}

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/**

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* Strip line breaks, restrict allowed HTML to a few allowed tags and execute nested shortcodes.

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* @since 4.5.0

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* @param string $content Post content.

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* @return mixed|string

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private static function do_shortcode( $content ) {

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// strip autoinserted line breaks.

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$content = preg_replace( '#(<(?:br /|/?p)>\n?)*(\[/?[a-z]+\])(<(?:br /|/?p)>\n?)*#', '$2', $content );

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// Add internal parameter so it's only rendered when it has it.

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$content = preg_replace( '/\[(question|answer|wrong|explanation)\]/i', '[$1 quiz_item="true"]', $content );

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$content = do_shortcode( $content );

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$content = wp_kses(

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$content,

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array(

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'tt' => array(),

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'a' => array(

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'href' => true,

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'class' => true,

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'data-quiz-option' => true,

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'aria-label' => true,

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'role' => 'button',

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'pre' => array(),

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'strong' => array(),

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'i' => array(),

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'svg' => array(),

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'g' => array(),

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'path' => array( 'd' => true ),

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'br' => array(),

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'span' => array( 'class' => true ),

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'img' => array( 'src' => true ),

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'div' => array(

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'class' => true,

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'data-correct' => 1,

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'data-track-id' => 1,

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'data-a8ctraining' => 1,

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'data-username' => 1,

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'tabindex' => false,

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)

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);

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return $content;

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}

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/**

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* Render question.

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* @since 4.5.0

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* @param array $atts Shortcode attributes.

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* @param null $content Post content.

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* @return string

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public static function question_shortcode( $atts, $content = null ) {

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return isset( $atts['quiz_item'] )

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? '<div class="jetpack-quiz-question question" tabindex="-1">' . self::do_shortcode( $content ) . '</div>'

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: '';

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}

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/**

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* Render correct answer.

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* @since 4.5.0

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* @param array $atts Shortcode attributes.

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* @param null $content Post content.

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* @return string

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public static function answer_shortcode( $atts, $content = null ) {

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if ( self::is_javascript_unavailable() ) {

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return self::noscript_info();

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}

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return isset( $atts['quiz_item'] )

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? '<div class="jetpack-quiz-answer answer" data-correct="1">' . self::do_shortcode( $content ) . '</div>'

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: '';

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}

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/**

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* Render wrong response.

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* @since 4.5.0

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* @param array $atts Shortcode attributes.

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* @param null $content Post content.

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* @return string

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public static function wrong_shortcode( $atts, $content = null ) {

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if ( self::is_javascript_unavailable() ) {

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return self::noscript_info();

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}

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return isset( $atts['quiz_item'] )

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? '<div class="jetpack-quiz-answer answer">' . self::do_shortcode( $content ) . '</div>'

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: '';

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}

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/**

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* Render explanation for wrong or right answer.

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* @since 4.5.0

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* @param array $atts Shortcode attributes.

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* @param null $content Post content.

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* @return string

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public static function explanation_shortcode( $atts, $content = null ) {

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if ( self::is_javascript_unavailable() ) {

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return self::noscript_info();

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}

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return isset( $atts['quiz_item'] )

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? '<div class="jetpack-quiz-explanation explanation">' . self::do_shortcode( $content ) . '</div>'

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: '';

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}

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}

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Quiz_Shortcode::init();

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