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<?php //phpcs:ignore WordPress.Files.FileName.InvalidClassFileNam use Automattic\Jetpack\Assets; /** * Quiz shortcode. * * Usage: * * [quiz] * [question]What's the right answer?[/question] * [wrong]This one?[explanation]Nope[/explanation][/wrong] * [answer]Yes, this is the one![explanation]Yay![/explanation][/answer] * [wrong]Maybe this one[explanation]Keep trying[/explanation][/wrong] * [wrong]How about this one?[explanation]Try again[/explanation][/wrong] * [/quiz] * * Can also be wrapped in [quiz-wrapper] to display all quizzes together. */ class Quiz_Shortcode { /** * Parameters admitted by [quiz] shortcode. * * @since 4.5.0 * * @var array */ private static $quiz_params = array(); /** * Whether the [quiz-wrapper] shortcode is used. * * @since 10.1 * * @var bool */ private static $quiz_wrapper = false; /** * Whether the scripts were enqueued. * * @since 4.5.0 * * @var bool */ private static $scripts_enqueued = false; /** * In a8c training, store user currently logged in. * * @since 4.5.0 * * @var null */ private static $username = null; /** * Whether the noscript tag was already printed. * * @since 4.5.0 * * @var bool */ private static $noscript_info_printed = false; /** * Whether JavaScript is available. * * @since 4.5.0 * * @var null */ private static $javascript_unavailable = null; /** * Register all shortcodes. * * @since 4.5.0 */ public static function init() { add_shortcode( 'quiz-wrapper', array( __CLASS__, 'shortcode_wrapper' ) ); add_shortcode( 'quiz', array( __CLASS__, 'shortcode' ) ); add_shortcode( 'question', array( __CLASS__, 'question_shortcode' ) ); add_shortcode( 'answer', array( __CLASS__, 'answer_shortcode' ) ); add_shortcode( 'wrong', array( __CLASS__, 'wrong_shortcode' ) ); add_shortcode( 'explanation', array( __CLASS__, 'explanation_shortcode' ) ); } /** * Enqueue assets needed by the quiz, * * @since 4.5.0 */ private static function enqueue_scripts() { wp_enqueue_style( 'quiz', plugins_url( 'css/quiz.css', __FILE__ ), array(), JETPACK__VERSION ); wp_enqueue_script( 'quiz', Assets::get_file_url_for_environment( '_inc/build/shortcodes/js/quiz.min.js', 'modules/shortcodes/js/quiz.js' ), array( 'jquery' ), JETPACK__VERSION, true ); } /** * Check if this is a feed and thus JS is unavailable. * * @since 4.5.0 * * @return bool|null */ private static function is_javascript_unavailable() { if ( self::$javascript_unavailable !== null ) { return self::$javascript_unavailable; } if ( is_feed() ) { self::$javascript_unavailable = true; return self::$javascript_unavailable; } self::$javascript_unavailable = false; return self::$javascript_unavailable; } /** * Display message when JS is not available. * * @since 4.5.0 * * @return string */ private static function noscript_info() { if ( self::$noscript_info_printed ) { return ''; } self::$noscript_info_printed = true; return '<noscript><div><i>' . esc_html__( 'Please view this post in your web browser to complete the quiz.', 'jetpack' ) . '</i></div></noscript>'; } /** * Check if we're in WordPress.com. * * @since 4.5.0 * * @return bool */ public static function is_wpcom() { return defined( 'IS_WPCOM' ) && IS_WPCOM; } /** * Parse shortcode arguments and render its output. * * @since 4.5.0 * * @param array $atts Shortcode parameters. * @param string $content Content enclosed by shortcode tags. * * @return string */ public static function shortcode( $atts, $content = null ) { // There's nothing to do if there's nothing enclosed. if ( empty( $content ) ) { return ''; } $id = ''; if ( self::is_javascript_unavailable() ) { // in an e-mail print the question and the info sentence once per question, too. self::$noscript_info_printed = false; } else { if ( ! self::$scripts_enqueued ) { // lazy enqueue cannot use the wp_enqueue_scripts action anymore. self::enqueue_scripts(); self::$scripts_enqueued = true; } $default_atts = self::is_wpcom() ? array( 'trackid' => '', 'a8ctraining' => '', ) : array( 'trackid' => '', ); self::$quiz_params = shortcode_atts( $default_atts, $atts ); if ( ! empty( self::$quiz_params['trackid'] ) ) { $id .= ' data-trackid="' . esc_attr( self::$quiz_params['trackid'] ) . '"'; } if ( self::is_wpcom() && ! empty( self::$quiz_params['a8ctraining'] ) ) { if ( self::$username === null ) { self::$username = wp_get_current_user()->user_login; } $id .= ' data-a8ctraining="' . esc_attr( self::$quiz_params['a8ctraining'] ) . '" data-username="' . esc_attr( self::$username ) . '"'; } } $quiz = self::do_shortcode( $content ); $quiz_options = ''; if ( self::$quiz_wrapper ) { $quiz_options = '<div class="jetpack-quiz-options"> <span class="jetpack-quiz-count"></span> <a class="jetpack-quiz-option-button" data-quiz-option="previous" role="button" aria-label="' . esc_attr__( 'Previous quiz', 'jetpack' ) . '"> <svg viewBox="0 0 24 24" class="quiz-gridicon"> <g><path d="M14 20l-8-8 8-8 1.414 1.414L8.828 12l6.586 6.586"></path></g></svg></a> <a class="jetpack-quiz-option-button" data-quiz-option="next" role="button" aria-label="' . esc_attr__( 'Next quiz', 'jetpack' ) . '"> <svg viewBox="0 0 24 24" class="quiz-gridicon"> <g><path d="M10 20l8-8-8-8-1.414 1.414L15.172 12l-6.586 6.586"></path></g></svg></a> </div>'; } return '<div class="jetpack-quiz quiz"' . $id . '>' . $quiz . $quiz_options . '</div>'; } /** * Wrap shortcode contents. * * @since 10.1 * * @param array $atts Shortcode parameters. * @param string $content Content enclosed by shortcode tags. * * @return string */ public static function shortcode_wrapper( $atts, $content = null ) { self::$quiz_wrapper = true; return '<div class="jetpack-quiz-wrapper">' . self::do_shortcode( $content ) . '</div>'; } /** * Strip line breaks, restrict allowed HTML to a few allowed tags and execute nested shortcodes. * * @since 4.5.0 * * @param string $content Post content. * * @return mixed|string */ private static function do_shortcode( $content ) { // strip autoinserted line breaks. $content = preg_replace( '#(<(?:br /|/?p)>\n?)*(\[/?[a-z]+\])(<(?:br /|/?p)>\n?)*#', '$2', $content ); // Add internal parameter so it's only rendered when it has it. $content = preg_replace( '/\[(question|answer|wrong|explanation)\]/i', '[$1 quiz_item="true"]', $content ); $content = do_shortcode( $content ); $content = wp_kses( $content, array( 'tt' => array(), 'a' => array( 'href' => true, 'class' => true, 'data-quiz-option' => true, 'aria-label' => true, 'role' => 'button', ), 'pre' => array(), 'strong' => array(), 'i' => array(), 'svg' => array(), 'g' => array(), 'path' => array( 'd' => true ), 'br' => array(), 'span' => array( 'class' => true ), 'img' => array( 'src' => true ), 'div' => array( 'class' => true, 'data-correct' => 1, 'data-track-id' => 1, 'data-a8ctraining' => 1, 'data-username' => 1, 'tabindex' => false, ), ) ); return $content; } /** * Render question. * * @since 4.5.0 * * @param array $atts Shortcode attributes. * @param null $content Post content. * * @return string */ public static function question_shortcode( $atts, $content = null ) { return isset( $atts['quiz_item'] ) ? '<div class="jetpack-quiz-question question" tabindex="-1">' . self::do_shortcode( $content ) . '</div>' : ''; } /** * Render correct answer. * * @since 4.5.0 * * @param array $atts Shortcode attributes. * @param null $content Post content. * * @return string */ public static function answer_shortcode( $atts, $content = null ) { if ( self::is_javascript_unavailable() ) { return self::noscript_info(); } return isset( $atts['quiz_item'] ) ? '<div class="jetpack-quiz-answer answer" data-correct="1">' . self::do_shortcode( $content ) . '</div>' : ''; } /** * Render wrong response. * * @since 4.5.0 * * @param array $atts Shortcode attributes. * @param null $content Post content. * * @return string */ public static function wrong_shortcode( $atts, $content = null ) { if ( self::is_javascript_unavailable() ) { return self::noscript_info(); } return isset( $atts['quiz_item'] ) ? '<div class="jetpack-quiz-answer answer">' . self::do_shortcode( $content ) . '</div>' : ''; } /** * Render explanation for wrong or right answer. * * @since 4.5.0 * * @param array $atts Shortcode attributes. * @param null $content Post content. * * @return string */ public static function explanation_shortcode( $atts, $content = null ) { if ( self::is_javascript_unavailable() ) { return self::noscript_info(); } return isset( $atts['quiz_item'] ) ? '<div class="jetpack-quiz-explanation explanation">' . self::do_shortcode( $content ) . '</div>' : ''; } } Quiz_Shortcode::init();
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