<?php
use Sensei\Internal\Student_Progress\Quiz_Progress\Models\Quiz_Progress_Interface;
use Sensei\Internal\Student_Progress\Quiz_Progress\Repositories\Quiz_Progress_Repository_Factory;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly
}
/**
* Sensei Quiz Class
*
* All functionality pertaining to the quiz post type in Sensei.
*
* @package Assessment
* @author Automattic
*
* @since 1.0.0
*/
class Sensei_Quiz {
/**
* The CPT token.
*
* @var string
*/
public $token;
/**
* The CPT meta fields.
*
* @var string[]
*/
public $meta_fields;
/**
* The main plugin filename.
*
* @deprecated 4.9.0 This attribute was never meant to be used. Added by mistake in `1f529be` and later made useless in `4f25fe5`.
* @var string
*/
public $file;
/**
* Frontend data object. Filled in `Sensei_Quiz::load_global_quiz_data()`.
*
* @var stdClass|null
*/
public $data;
/**
* Constructor.
*
* @since 1.0.0
*
* @param string $file Main plugin filename. Not used.
*/
public function __construct( $file = __FILE__ ) {
$this->file = $file;
$this->token = 'quiz';
$this->meta_fields = array(
'quiz_passmark',
'quiz_lesson',
'quiz_type',
'quiz_grade_type',
'pass_required',
'enable_quiz_reset',
'show_questions',
'random_question_order',
);
add_filter( 'wp_insert_post_data', [ $this, 'set_quiz_author_on_create' ], 10, 4 );
add_action( 'save_post', array( $this, 'update_after_lesson_change' ) );
// Redirect if the lesson is protected.
add_action( 'template_redirect', array( $this, 'redirect_if_lesson_is_protected' ) );
// Listen for a page change.
add_action( 'template_redirect', array( $this, 'page_change_listener' ) );
// Listen to the reset button click.
add_action( 'template_redirect', array( $this, 'reset_button_click_listener' ) );
// Fire the complete quiz button submit for grading action.
add_action( 'template_redirect', array( $this, 'user_quiz_submit_listener' ) );
// Fire the save user answers quiz button click responder.
add_action( 'template_redirect', array( $this, 'user_save_quiz_answers_listener' ) );
// Fire the load global data function.
add_action( 'sensei_single_quiz_content_inside_before', array( $this, 'load_global_quiz_data' ), 80 );
add_action( 'template_redirect', array( $this, 'quiz_has_no_questions' ) );
// Remove post when lesson is permanently deleted.
add_action( 'delete_post', array( $this, 'maybe_delete_quiz' ) );
add_filter( 'body_class', [ $this, 'add_quiz_blocks_class' ] );
add_filter( 'post_class', [ $this, 'add_quiz_blocks_class' ] );
add_filter( 'sensei_quiz_enable_block_based_editor', [ $this, 'disable_block_editor_functions_when_question_types_are_registered' ], 2 ); // It has 2 as priority for better backward compabilitiby, since originally it was inside the method `is_block_based_editor_enabled`.
// Frontend-specific hooks.
if ( ! is_admin() ) {
// Create the quiz progress when the student visits the quiz page for the first time.
add_action( 'wp', array( $this, 'maybe_create_quiz_progress' ) );
}
}
/**
* Check if the block based quiz editor is enabled. If not, fall back to the legacy metabox editor.
*
* @since 3.9.0
*
* @return bool
*/
public function is_block_based_editor_enabled() {
$current_screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
$is_block_editor = (
! $current_screen || $current_screen->is_block_editor()
) || (
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Don't touch the nonce.
isset( $_GET['meta-box-loader-nonce'] ) && wp_verify_nonce( wp_unslash( $_GET['meta-box-loader-nonce'] ), 'meta-box-loader' )
);
/**
* Filter to change whether the block based editor should be used instead of the legacy
* metabox based editor. This is to allow sites to migrate over to the block based
* editor if necessary.
*
* @since 3.9.0
*
* @hook sensei_quiz_enable_block_based_editor
*
* @param {bool} $is_block_based_editor_enabled True if block based editor is enabled.
* @return {bool} Filtered value.
*/
return apply_filters( 'sensei_quiz_enable_block_based_editor', $is_block_editor );
}
/**
* Disable block based editor when custom question types have been registered.
*
* @since 4.11.0
*
* @param bool $is_block_based_editor_enabled Whether the block based editor is enabled.
*
* @return bool Whether block based editor should be enabled.
*/
public function disable_block_editor_functions_when_question_types_are_registered( $is_block_based_editor_enabled ) {
return ! has_filter( 'sensei_question_types' ) && $is_block_based_editor_enabled;
}
/**
* Hooks into `wp_insert_post_data` and updates the quiz author to the lesson author on create.
*
* @param mixed $data The data to be saved.
* @param mixed $postarr The post data.
* @param mixed $unsanitized_postarr Unsanitized post data.
* @param bool|null $update Whether the action is for an existing post being updated or not.
* @return mixed
*/
public function set_quiz_author_on_create( $data, $postarr, $unsanitized_postarr, $update = null ) {
// Compatibility for WP < 6.0.
if ( null === $update ) {
$update = ! empty( $postarr['ID'] );
}
// Only handle new posts.
if ( $update ) {
return $data;
}
// Only handle quizzes.
if ( 'quiz' !== $data['post_type'] ) {
return $data;
}
// Set author to lesson author.
$lesson_id = $postarr['post_parent'] ?? null;
if ( $lesson_id ) {
$lesson = get_post( $lesson_id );
if ( $lesson ) {
$data['post_author'] = $lesson->post_author;
}
}
return $data;
}
/**
* Update the quiz data when the lesson is changed
*
* @param int $post_id
* @return void
*/
public function update_after_lesson_change( $post_id ) {
// If this isn't a 'lesson' post, don't update it.
// if this is a revision don't save it
// We can ignore nonce verification because we don't make any changes using $_POST data.
if ( ! isset( $_POST['post_type'] ) // phpcs:ignore WordPress.Security.NonceVerification
|| 'lesson' !== $_POST['post_type'] // phpcs:ignore WordPress.Security.NonceVerification
|| wp_is_post_revision( $post_id ) ) {
return;
}
// Get the lesson author id to be use late.
$saved_lesson = get_post( $post_id );
$new_lesson_author_id = $saved_lesson->post_author;
// Get the lessons quiz.
$quiz_id = Sensei()->lesson->lesson_quizzes( $post_id );
if ( ! $quiz_id ) {
return;
}
// Setup the quiz items new author value.
$my_post = array(
'ID' => $quiz_id,
'post_author' => $new_lesson_author_id,
'post_name' => $saved_lesson->post_name,
'post_title' => $saved_lesson->post_title,
);
// Remove the action so that it doesn't fire again.
remove_action( 'save_post', array( $this, 'update_after_lesson_change' ) );
// Update the post into the database.
wp_update_post( $my_post );
}
/**
* Get the lesson this quiz belongs to.
*
* @since 1.7.2
* @param int|null $quiz_id (Optional) The quiz post ID. Defaults to the current post ID.
* @return int|bool Lesson ID or false if not found.
*/
public function get_lesson_id( $quiz_id = null ) {
if ( empty( $quiz_id ) || ! intval( $quiz_id ) > 0 ) {
global $post;
if ( 'quiz' === get_post_type( $post ) ) {
$quiz_id = $post->ID;
} else {
return false;
}
}
$quiz = get_post( $quiz_id );
return $quiz ? $quiz->post_parent : false;
}
/**
* Get lesson ids for given quizzes.
*
* @since 4.18.0
*
* @param int[] $quiz_ids The quiz IDs.
* @return array Lesson ids, empty array if no lessons found.
*/
public function get_lesson_ids( array $quiz_ids ) {
$quiz_parents = get_posts(
array(
'fields' => 'id=>parent',
'post_type' => 'quiz',
'post__in' => $quiz_ids,
'posts_per_page' => -1,
)
);
return array_unique( array_values( $quiz_parents ) );
}
/**
* This function hooks into the quiz page and accepts the answer form save post.
*
* @since 1.7.3
*/
public function user_save_quiz_answers_listener() {
if ( ! isset( $_POST['quiz_save'] )
|| empty( $_POST['sensei_question'] )
|| empty( $_POST['questions_asked'] )
|| ! isset( $_POST['woothemes_sensei_save_quiz_nonce'] )
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Do not change the nonce.
|| ! wp_verify_nonce( wp_unslash( $_POST['woothemes_sensei_save_quiz_nonce'] ), 'woothemes_sensei_save_quiz_nonce' ) ) {
return;
}
$quiz_id = get_the_ID();
$lesson_id = $this->get_lesson_id( $quiz_id );
$user_id = get_current_user_id();
$answers = $this->parse_form_answers(
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- The answers value can vary, so we do the sanitization on output.
wp_unslash( $_POST['sensei_question'] ),
array_map( 'intval', $_POST['questions_asked'] ),
$lesson_id,
$user_id
);
$success = self::save_user_answers( $answers, $_FILES, $lesson_id, $user_id );
if ( $success ) {
// Update the message shown to the user.
Sensei()->frontend->messages = '<div class="sensei-message note">' . __( 'Quiz Saved Successfully.', 'sensei-lms' ) . '</div>';
}
// remove the hook as it should only fire once per click
remove_action( 'sensei_single_quiz_content_inside_before', 'user_save_quiz_answers_listener' );
}
/**
* Parse the provided answers by filling in missing answers or removing answers not part of the quiz.
*
* @since 3.15.0
*
* @param array $answers The submitted answers.
* @param array $questions_asked The ID's of all the asked quiz questions.
* @param int $lesson_id The lesson ID.
* @param int $user_id The user ID.
*
* @return array
*/
private function parse_form_answers( array $answers, array $questions_asked, int $lesson_id, int $user_id ): array {
// If we have a fraction of the answers (e.g. pagination), include the previously saved answers.
if ( count( $answers ) !== count( $questions_asked ) ) {
$previous_answers = self::get_user_answers( $lesson_id, $user_id );
if ( $previous_answers ) {
// Merge and preserve the indexes.
$answers = array_replace( $previous_answers, $answers );
}
}
// Merge with the questions asked.
return $this->merge_quiz_answers_with_questions_asked(
$answers,
$questions_asked
);
}
/**
* Save the user answers for the given lesson's quiz
*
* For this function you must supply all three parameters. It will return false if one is left out.
*
* @since 1.7.4
* @access public
*
* @param array $quiz_answers
* @param array $files from global $_FILES
* @param int $lesson_id
* @param int $user_id
*
* @return false|int $answers_saved
*/
public static function save_user_answers( $quiz_answers, $files = array(), $lesson_id = 0, $user_id = 0 ) {
if ( ! ( $user_id > 0 ) ) {
$user_id = get_current_user_id();
}
// make sure the parameters are valid before continuing
if ( empty( $lesson_id ) || empty( $user_id )
|| 'lesson' !== get_post_type( $lesson_id )
|| ! get_userdata( $user_id )
|| ! is_array( $quiz_answers ) ) {
return false;
}
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
// start the lesson before saving the data in case the user has not started the lesson
Sensei_Utils::sensei_start_lesson( $lesson_id, $user_id );
// prepare the answers
$prepared_answers = self::prepare_form_submitted_answers( $quiz_answers, $files );
if ( ! $prepared_answers ) {
return false;
}
// save the user data
$submission = Sensei()->quiz_submission_repository->get_or_create( $quiz_id, $user_id );
Sensei()->quiz_grade_repository->delete_all( $submission );
Sensei()->quiz_answer_repository->delete_all( $submission );
foreach ( $prepared_answers as $question_id => $answer ) {
Sensei()->quiz_answer_repository->create( $submission, $question_id, $answer );
}
// Save transient to make retrieval faster.
$transient_key = 'sensei_answers_' . $user_id . '_' . $lesson_id;
set_transient( $transient_key, $prepared_answers, 10 * DAY_IN_SECONDS );
return true;
}
/**
* Get the user answers for the given lesson's quiz.
*
* This function returns the data that is stored on the lesson as meta and is not compatible with
* retrieving data for quiz answer before sensei 1.7.4
*
* @since 1.7.4
* @access public
*
* @param int $lesson_id
* @param int $user_id
*
* @return array<int, string>|false $answers or false
*/
public function get_user_answers( $lesson_id, $user_id ) {
if ( ! intval( $lesson_id ) > 0 || 'lesson' !== get_post_type( $lesson_id )
|| ! intval( $user_id ) > 0 || ! get_userdata( $user_id ) ) {
return false;
}
// save some time and get the transient cached data
$transient_key = 'sensei_answers_' . $user_id . '_' . $lesson_id;
$transient_cached_answers = get_transient( $transient_key );
// return the transient or get the values get the values from the comment meta
$encoded_answers_map = [];
if ( ! empty( $transient_cached_answers ) ) {
$encoded_answers_map = $transient_cached_answers;
} else {
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
if ( ! $quiz_id ) {
return false;
}
$submission = Sensei()->quiz_submission_repository->get( $quiz_id, $user_id );
if ( ! $submission ) {
return false;
}
$answers = Sensei()->quiz_answer_repository->get_all( $submission->get_id() );
foreach ( $answers as $answer ) {
$encoded_answers_map[ $answer->get_question_id() ] = $answer->get_value();
}
}
if ( ! $encoded_answers_map ) {
return false;
}
// set the transient with the new valid data for faster retrieval in future
set_transient( $transient_key, $encoded_answers_map, 10 * DAY_IN_SECONDS );
// Decode and unserialize all answers.
$decoded_answers_map = [];
foreach ( $encoded_answers_map as $question_id => $encoded_answer ) {
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode
$decoded_answers_map[ $question_id ] = maybe_unserialize( base64_decode( $encoded_answer ) );
}
return $decoded_answers_map;
}
/**
*
* This function runs on the init hook and checks if the reset quiz button was clicked.
*
* @since 1.7.2
* @hooked init
*
* @return void;
*/
public function reset_button_click_listener() {
if ( ! isset( $_POST['quiz_reset'] )
|| ! isset( $_POST['woothemes_sensei_reset_quiz_nonce'] )
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Do not change the nonce.
|| ! wp_verify_nonce( wp_unslash( $_POST['woothemes_sensei_reset_quiz_nonce'] ), 'woothemes_sensei_reset_quiz_nonce' ) ) {
return; // exit
}
global $post;
$current_quiz_id = $post->ID;
$lesson_id = $this->get_lesson_id( $current_quiz_id );
// reset all user data
$this->reset_user_lesson_data( $lesson_id, get_current_user_id() );
// Redirect to the start of the quiz.
wp_safe_redirect(
add_query_arg( [ 'bypass_server_cache' => uniqid() ], remove_query_arg( 'quiz-page' ) )
);
exit;
}
/**
* Complete/ submit quiz hooked function
*
* This function listens to the complete button submit action and processes the users submitted answers
* not that this function submits the given users quiz answers for grading.
*
* @since 1.7.4
* @access public
*
* @since
* @return void
*/
public function user_quiz_submit_listener() {
// only respond to valid quiz completion submissions
if (
! isset( $_POST['quiz_complete'] )
|| empty( $_POST['questions_asked'] )
|| ! isset( $_POST['woothemes_sensei_complete_quiz_nonce'] )
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Do not change the nonce.
|| ! wp_verify_nonce( wp_unslash( $_POST['woothemes_sensei_complete_quiz_nonce'] ), 'woothemes_sensei_complete_quiz_nonce' )
|| ! self::is_quiz_available()
|| self::is_quiz_completed()
) {
return;
}
$quiz_id = get_the_ID();
$lesson_id = $this->get_lesson_id( $quiz_id );
$user_id = get_current_user_id();
$answers = $this->parse_form_answers(
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- The answers value can vary, so we do the sanitization on output.
wp_unslash( $_POST['sensei_question'] ?? [] ),
array_map( 'intval', $_POST['questions_asked'] ),
$lesson_id,
$user_id
);
self::submit_answers_for_grading( $answers, $_FILES, $lesson_id, $user_id );
// Redirect to the start of the quiz.
wp_safe_redirect(
add_query_arg( [ 'bypass_server_cache' => uniqid() ], remove_query_arg( 'quiz-page' ) )
);
exit;
}
/**
* Redirect back to the lesson if the lesson is password protected.
*
* @since 4.4.3
* @access private
*/
public function redirect_if_lesson_is_protected() {
if ( ! is_singular( 'quiz' ) ) {
return;
}
$lesson_id = $this->get_lesson_id();
if ( post_password_required( $lesson_id ) ) {
wp_safe_redirect( get_permalink( $lesson_id ) );
exit;
}
}
/**
* Handle the page change form submission and redirects to the target page.
*
* The quiz form is submitted on each page change.
* This is needed to save the answers for each page.
* Used when the quiz pagination is enabled.
*
* @since 3.15.0
* @access private
*/
public function page_change_listener() {
if (
! isset( $_POST['quiz_target_page'] )
|| empty( $_POST['questions_asked'] )
|| ! isset( $_POST['sensei_quiz_page_change_nonce'] )
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Do not change the nonce.
|| ! wp_verify_nonce( wp_unslash( $_POST['sensei_quiz_page_change_nonce'] ), 'sensei_quiz_page_change_nonce' )
) {
return;
}
if ( self::is_quiz_available() && ! self::is_quiz_completed() ) {
$quiz_id = get_the_ID();
$user_id = get_current_user_id();
$lesson_id = $this->get_lesson_id( $quiz_id );
$answers = $this->parse_form_answers(
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- The answers value can vary, so we do the sanitization on output.
wp_unslash( $_POST['sensei_question'] ?? [] ),
array_map( 'intval', $_POST['questions_asked'] ),
$lesson_id,
$user_id
);
self::save_user_answers( $answers, $_FILES, $lesson_id, $user_id );
}
// Redirect to the target page.
wp_safe_redirect(
add_query_arg( [ 'bypass_server_cache' => uniqid() ], sanitize_text_field( wp_unslash( $_POST['quiz_target_page'] ) ) )
);
exit;
}
/**
* This function set's up the data need for the quiz page
*
* This function hooks into sensei_complete_quiz and load the global data for the
* current quiz.
*
* @since 1.7.4
* @access public
*/
public function load_global_quiz_data() {
global $post, $current_user;
$this->data = new stdClass();
// Get Quiz Questions.
$lesson_quiz_questions = Sensei()->lesson->lesson_quiz_questions( $post->ID );
// Get Quiz Lesson ID.
$quiz_lesson_id = absint( get_post_meta( $post->ID, '_quiz_lesson', true ) );
// Get quiz grade type.
$quiz_grade_type = get_post_meta( $post->ID, '_quiz_grade_type', true );
// Get quiz pass mark.
$quiz_passmark = Sensei_Utils::as_absolute_rounded_number( get_post_meta( $post->ID, '_quiz_passmark', true ), 2 );
// Get latest quiz answers and grades.
$lesson_id = Sensei()->quiz->get_lesson_id( $post->ID );
$user_quizzes = Sensei()->quiz->get_user_answers( $lesson_id, get_current_user_id() );
$user_quiz_grade = 0;
$quiz_submission = Sensei()->quiz_submission_repository->get( $post->ID, $current_user->ID );
if ( $quiz_submission ) {
$user_quiz_grade = $quiz_submission->get_final_grade();
}
if ( ! is_array( $user_quizzes ) ) {
$user_quizzes = array(); }
// Check again that the lesson is complete.
$user_lesson_end = Sensei_Utils::user_completed_lesson( $lesson_id, $current_user->ID );
$user_lesson_complete = false;
if ( $user_lesson_end ) {
$user_lesson_complete = true;
}
$reset_allowed = get_post_meta( $post->ID, '_enable_quiz_reset', true );
// Backwards compatibility.
if ( 'on' == $reset_allowed ) {
$reset_allowed = 1;
}
// Build frontend data object for backwards compatibility
// using this is no longer recommended.
$this->data->user_quiz_grade = $user_quiz_grade;
$this->data->quiz_passmark = $quiz_passmark;
$this->data->quiz_lesson = $quiz_lesson_id;
$this->data->quiz_grade_type = $quiz_grade_type;
$this->data->user_lesson_end = $user_lesson_end;
$this->data->user_lesson_complete = $user_lesson_complete;
$this->data->lesson_quiz_questions = $lesson_quiz_questions;
$this->data->reset_quiz_allowed = $reset_allowed;
}
/**
* This function converts the submitted array and makes it ready for storage.
*
* Creating a single array of all question types including file id's to be stored
* as comment meta by the calling function.
*
* @since 1.7.4
* @access public
*
* @param array $unprepared_answers Submitted answers.
* @param array $files Uploaded files.
* @return array|false
*/
public static function prepare_form_submitted_answers( $unprepared_answers, $files ) {
$prepared_answers = array();
// validate incoming answers
if ( empty( $unprepared_answers ) || ! is_array( $unprepared_answers ) ) {
return false;
}
// Loop through submitted quiz answers and save them appropriately
foreach ( $unprepared_answers as $question_id => $answer ) {
// get the current questions question type
$question_type = Sensei()->question->get_question_type( $question_id );
$answer = wp_unslash( $answer );
// compress the answer for saving
if ( 'multi-line' === $question_type ) {
$answer = wp_kses( $answer, wp_kses_allowed_html( 'post' ) );
} elseif ( 'file-upload' === $question_type ) {
$file_key = 'file_upload_' . $question_id;
if (
isset( $files[ $file_key ] )
&& self::is_uploaded_file_valid( $files[ $file_key ]['tmp_name'], $files[ $file_key ]['name'], $question_id )
) {
$attachment_id = Sensei_Utils::upload_file( $files[ $file_key ] );
if ( $attachment_id ) {
$answer = $attachment_id;
}
}
}
$prepared_answers[ $question_id ] = base64_encode( maybe_serialize( $answer ) );
}
return $prepared_answers;
}
/**
* Validate the mime type of an uploaded file to a quiz question.
*
* @param string $file_path Path to the uploaded file.
* @param string $file_name File name.
* @param int $question_id Question post ID.
*
* @return bool
*/
private static function is_uploaded_file_valid( $file_path, $file_name, $question_id ) {
/**
* Filters allowed which mimetypes are allowed.
*
* @since 3.7.0
*
* @hook sensei_quiz_answer_file_upload_types
*
* @param {false|array} $allowed_mime_types Array of allowed mimetypes. Returns `false` to allow all file types.
* @param {int} $question_id Question post ID.
* @return {false|array} Allowed mime types or false to allow all types.
*/
$allowed_mime_types = apply_filters( 'sensei_quiz_answer_file_upload_types', false, $question_id );
// If `$allowed_mime_types` is false, don't filter by mime type.
if ( false === $allowed_mime_types ) {
return true;
}
$file_type = wp_check_filetype_and_ext( $file_path, $file_name );
return $file_type['type'] && in_array( $file_type['type'], $allowed_mime_types, true );
}
/**
* Reset user submitted questions
*
* This function resets the quiz data for a user that has been submitted fro grading already. It is different to
* the save_user_answers as currently the saved and submitted answers are stored differently.
*
* @since 1.7.4
* @access public
*
* @return bool $reset_success
* @param int $user_id
* @param int $lesson_id
*/
public function reset_user_lesson_data( $lesson_id, $user_id = 0 ) {
// Make sure the parameters are valid.
if ( empty( $lesson_id ) || empty( $user_id )
|| 'lesson' !== get_post_type( $lesson_id )
|| ! get_userdata( $user_id ) ) {
return false;
}
// Get the lesson quiz.
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
// Check if the user has started the lesson or quiz.
$need_reset_data = false;
$user_has_lesson_progress = Sensei()->lesson_progress_repository->has( $lesson_id, $user_id );
if ( $user_has_lesson_progress ) {
$need_reset_data = true;
}
if ( $quiz_id ) {
$user_has_quiz_progress = Sensei()->quiz_progress_repository->has( $quiz_id, $user_id );
if ( $user_has_quiz_progress ) {
$need_reset_data = true;
}
}
// This user is not taking this lesson so this process is not needed.
if ( ! $need_reset_data ) {
return false;
}
// Reset the transients.
$answers_transient_key = 'sensei_answers_' . $user_id . '_' . $lesson_id;
$grades_transient_key = 'quiz_grades_' . $user_id . '_' . $lesson_id;
$answers_feedback_transient_key = 'sensei_answers_feedback_' . $user_id . '_' . $lesson_id;
delete_transient( $answers_transient_key );
delete_transient( $grades_transient_key );
delete_transient( $answers_feedback_transient_key );
$lesson_progress = Sensei()->lesson_progress_repository->get( $lesson_id, $user_id );
if ( $lesson_progress ) {
$lesson_progress->start();
Sensei()->lesson_progress_repository->save( $lesson_progress );
}
if ( $quiz_id ) {
// Reset the quiz progress.
$quiz_progress = Sensei()->quiz_progress_repository->get( $quiz_id, $user_id );
if ( $quiz_progress ) {
$quiz_progress->start();
Sensei()->quiz_progress_repository->save( $quiz_progress );
}
// Delete quiz answers, this auto deletes the corresponding meta data, such as the question/answer grade.
Sensei_Utils::sensei_delete_quiz_answers( $quiz_id, $user_id );
}
// Update course completion.
$course_id = Sensei()->lesson->get_course_id( $lesson_id );
$course_progress = Sensei()->course_progress_repository->get( $course_id, $user_id );
if ( $course_progress ) {
$course_progress->start( $course_progress->get_started_at() );
Sensei()->course_progress_repository->save( $course_progress );
// Reset the course progress metadata.
$course_progress_metadata = [
'complete' => 0,
'percent' => 0,
];
foreach ( $course_progress_metadata as $key => $value ) {
update_comment_meta( $course_progress->get_id(), $key, $value );
}
}
// Run any action on quiz/lesson reset (previously this didn't occur on resetting a quiz, see resetting a lesson in sensei_complete_lesson().
do_action( 'sensei_user_lesson_reset', $user_id, $lesson_id );
if ( ! is_admin() ) {
Sensei()->notices->add_notice( __( 'Lesson Reset Successfully.', 'sensei-lms' ), 'info' );
}
return true;
}
/**
* Submit the users quiz answers for grading
*
* This function accepts users answers and stores it but also initiates the grading
* if a quiz can be graded automatically it will, if not the answers can be graded by the teacher.
*
* @since 1.7.4
* @access public
*
* @param array $quiz_answers
* @param array $files from $_FILES
* @param int $user_id
* @param int $lesson_id
*
* @return bool $answers_submitted
*/
public static function submit_answers_for_grading( $quiz_answers, $files = array(), $lesson_id = 0, $user_id = 0 ) {
// Get the user_id if none was passed in use the current logged in user.
if ( 0 >= (int) $user_id ) {
$user_id = get_current_user_id();
}
// Make sure the parameters are valid before continuing.
if ( empty( $lesson_id ) || empty( $user_id ) || ! is_array( $quiz_answers )
|| 'lesson' !== get_post_type( $lesson_id )
|| ! get_userdata( $user_id )
) {
return false;
}
// Get Quiz ID.
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
// Get quiz grade type.
$quiz_grade_type = get_post_meta( $quiz_id, '_quiz_grade_type', true );
// Get quiz pass setting.
$pass_required = get_post_meta( $quiz_id, '_pass_required', true );
// Get the minimum percentage need to pass this quiz.
$quiz_pass_percentage = Sensei_Utils::as_absolute_rounded_number( get_post_meta( $quiz_id, '_quiz_passmark', true ), 2 );
// Handle Quiz Questions asked
// This is to ensure we save the questions that we've asked this user and that this can't be change unless
// the quiz is reset by admin or user( user: only if the setting is enabled ).
// get the questions asked when when the quiz questions were generated for the user : Sensei_Lesson::lesson_quiz_questions.
$has_quiz_progress = Sensei()->quiz_progress_repository->has( $quiz_id, $user_id );
if ( ! $has_quiz_progress ) {
Sensei_Utils::user_start_lesson( $user_id, $lesson_id );
}
$lesson_progress = Sensei()->lesson_progress_repository->get( $lesson_id, $user_id );
if ( ! $lesson_progress ) {
$lesson_progress = Sensei()->lesson_progress_repository->create( $lesson_id, $user_id );
}
$quiz_progress = Sensei()->quiz_progress_repository->get( $quiz_id, $user_id );
if ( ! $quiz_progress ) {
// Even after starting a lesson we can't find the progress. Leave immediately.
return false;
}
// Save Quiz Answers for grading, the save function also calls the sensei_start_lesson.
self::save_user_answers( $quiz_answers, $files, $lesson_id, $user_id );
// Grade quiz.
$grade = Sensei_Grading::grade_quiz_auto( $quiz_id, $quiz_answers, 0, $quiz_grade_type );
// Get Lesson Grading Setting.
$lesson_metadata = array();
$lesson_status = 'ungraded'; // Default when completing a quiz.
$quiz_progress->ungrade();
// At this point the answers have been submitted.
$answers_submitted = true;
// if this condition is false the quiz should manually be graded by admin.
if ( 'auto' === $quiz_grade_type && ! is_wp_error( $grade ) ) {
// Quiz has been automatically Graded.
if ( 'on' === $pass_required ) {
// Student has reached the pass mark and lesson is complete.
if ( $quiz_pass_percentage <= $grade ) {
$lesson_progress->complete();
$quiz_progress->pass();
} else {
$quiz_progress->fail();
}
} else {
// Student only has to partake the quiz.
$lesson_progress->complete();
$quiz_progress->grade();
}
}
Sensei()->lesson_progress_repository->save( $lesson_progress );
Sensei()->quiz_progress_repository->save( $quiz_progress );
foreach ( $lesson_metadata as $key => $value ) {
update_comment_meta( $quiz_progress->get_id(), $key, $value );
}
if ( $lesson_progress->is_complete() ) {
/* The action is documented in includes/class-sensei-utils.php */
do_action( 'sensei_user_lesson_end', $user_id, $lesson_id );
}
/**
* User quiz has been submitted
*
* Fires the end of the submit_answers_for_grading function. It will fire irrespective of the submission
* results.
*
* @param int $user_id
* @param int $quiz_id
* @param string $grade
* @param string $quiz_pass_percentage
* @param string $quiz_grade_type
*/
do_action( 'sensei_user_quiz_submitted', $user_id, $quiz_id, $grade, $quiz_pass_percentage, $quiz_grade_type );
return $answers_submitted;
}
/**
* Get the user question answer.
*
* This function gets the users saved answer on given quiz for the given question parameter.
*
* @since 1.7.4
*
* @param int $lesson_id
* @param int $question_id
* @param int $user_id ( optional )
*
* @return string|null|false
*/
public function get_user_question_answer( $lesson_id, $question_id, $user_id = 0 ) {
// parameter validation
if ( empty( $lesson_id ) || empty( $question_id )
|| ! ( intval( $lesson_id ) > 0 )
|| ! ( intval( $question_id ) > 0 )
|| 'lesson' !== get_post_type( $lesson_id )
|| 'question' !== get_post_type( $question_id ) ) {
return false;
}
if ( ! ( intval( $user_id ) > 0 ) ) {
$user_id = get_current_user_id();
}
if ( 0 === $user_id ) {
return null;
}
$users_answers = $this->get_user_answers( $lesson_id, $user_id );
return $users_answers[ $question_id ] ?? null;
}
/**
* Saving the users quiz question grades
*
* This function save all the grades for all the question in a given quiz on the lesson
* comment meta. It makes use of transients to save the grades for easier access at a later stage
*
* @since 1.7.4
*
* @param array $quiz_grades{
* @type int $question_id
* @type int $question_grade
* }
* @param $lesson_id
* @param $user_id (Optional) will use the current user if not supplied
*
* @return bool
*/
public function set_user_grades( $quiz_grades, $lesson_id, $user_id = 0 ) {
// get the user_id if none was passed in use the current logged in user
if ( ! intval( $user_id ) > 0 ) {
$user_id = get_current_user_id();
}
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
// make sure the parameters are valid before continuing
if (
! $quiz_id
|| empty( $user_id )
|| 'lesson' !== get_post_type( $lesson_id )
|| ! get_userdata( $user_id )
|| ! is_array( $quiz_grades )
) {
return false;
}
$submission = Sensei()->quiz_submission_repository->get( $quiz_id, $user_id );
if ( ! $submission ) {
return false;
}
Sensei()->quiz_grade_repository->delete_all( $submission );
$answers = Sensei()->quiz_answer_repository->get_all( $submission->get_id() );
$answers_map = [];
foreach ( $answers as $answer ) {
$answers_map[ $answer->get_question_id() ] = $answer;
}
foreach ( $quiz_grades as $question_id => $points ) {
$answer = $answers_map[ $question_id ];
Sensei()->quiz_grade_repository->create( $submission, $answer, $question_id, $points );
}
$transient_key = 'quiz_grades_' . $user_id . '_' . $lesson_id;
set_transient( $transient_key, $quiz_grades, 10 * DAY_IN_SECONDS );
return true;
}
/**
* Retrieve the users quiz question grades
*
* This function gets all the grades for all the questions in the given lesson quiz for a specific user.
*
* @since 1.7.4
*
* @param $lesson_id
* @param $user_id (Optional) will use the current user if not supplied
*
* @return array|false $user_quiz_grades or false if none exists for this users
*/
public function get_user_grades( $lesson_id, $user_id = 0 ) {
// get the user_id if none was passed in use the current logged in user
if ( ! intval( $user_id ) > 0 ) {
$user_id = get_current_user_id();
}
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
if (
! intval( $lesson_id ) > 0
|| ! $quiz_id
|| 'lesson' !== get_post_type( $lesson_id )
|| ! intval( $user_id ) > 0
|| ! get_userdata( $user_id )
) {
return false;
}
// save some time and get the transient cached data
$transient_key = 'quiz_grades_' . $user_id . '_' . $lesson_id;
$grades_map = get_transient( $transient_key );
// get the data if nothing was stored in the transient
if ( false === $grades_map ) {
$submission = Sensei()->quiz_submission_repository->get( $quiz_id, $user_id );
if ( ! $submission ) {
return false;
}
$grades = Sensei()->quiz_grade_repository->get_all( $submission->get_id() );
$grades_map = [];
foreach ( $grades as $grade ) {
$grades_map[ $grade->get_question_id() ] = $grade->get_points();
}
// set the transient with the new valid data for faster retrieval in future
set_transient( $transient_key, $grades_map, 10 * DAY_IN_SECONDS );
}
// if there is no data for this user
if ( ! is_array( $grades_map ) ) {
return false;
}
return $grades_map;
}
/**
* Get the user question grade
*
* This function gets the grade on a quiz for the given question parameter
* It does NOT do any grading. It simply retrieves the data that was stored during grading.
* this function allows for a fallback to users still using the question saved data from before 1.7.4
*
* @since 1.7.4
*
* @param int $lesson_id
* @param int $question_id
* @param int $user_id ( optional )
*
* @return int|false
*/
public function get_user_question_grade( $lesson_id, $question_id, $user_id = 0 ) {
// parameter validation
if ( empty( $lesson_id ) || empty( $question_id )
|| ! ( intval( $lesson_id ) > 0 )
|| ! ( intval( $question_id ) > 0 )
|| 'lesson' !== get_post_type( $lesson_id )
|| 'question' !== get_post_type( $question_id ) ) {
return false;
}
$all_user_grades = $this->get_user_grades( $lesson_id, $user_id );
return $all_user_grades[ $question_id ] ?? false;
}
/**
* Save the user's answers feedback
*
* For this function you must supply all three parameters. If will return false one is left out.
* The data will be saved on the lesson ID supplied.
*
* @since 1.7.5
* @access public
*
* @param array $answers_feedback{
* $type int $question_id
* $type string $question_feedback
* }
* @param int $lesson_id
* @param int $user_id
*
* @return bool
*/
public function save_user_answers_feedback( $answers_feedback, $lesson_id, $user_id = 0 ) {
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
// make sure the parameters are valid before continuing
if (
! $quiz_id
|| empty( $user_id )
|| 'lesson' !== get_post_type( $lesson_id )
|| ! get_userdata( $user_id )
|| ! is_array( $answers_feedback )
) {
return false;
}
// check if the lesson is started before saving, if not start the lesson for the user
if ( ! ( 0 < intval( Sensei_Utils::user_started_lesson( $lesson_id, $user_id ) ) ) ) {
Sensei_Utils::sensei_start_lesson( $lesson_id, $user_id );
}
// encode the feedback
$encoded_answers_feedback = array();
foreach ( $answers_feedback as $question_id => $feedback ) {
$encoded_answers_feedback[ $question_id ] = base64_encode( $feedback );
}
$submission = Sensei()->quiz_submission_repository->get( $quiz_id, $user_id );
if ( ! $submission ) {
return false;
}
$grades = Sensei()->quiz_grade_repository->get_all( $submission->get_id() );
foreach ( $grades as $grade ) {
$feedback = $encoded_answers_feedback[ $grade->get_question_id() ];
$grade->set_feedback( $feedback );
}
Sensei()->quiz_grade_repository->save_many( $submission, $grades );
// Save transient to make retrieval faster in the future.
$transient_key = 'sensei_answers_feedback_' . $user_id . '_' . $lesson_id;
set_transient( $transient_key, $encoded_answers_feedback, 10 * DAY_IN_SECONDS );
return true;
}
/**
* Get the user's answers feedback.
*
* This function returns the feedback submitted by the teacher/admin
* during grading. Grading occurs manually or automatically.
*
* @since 1.7.5
* @access public
*
* @param int $lesson_id
* @param int $user_id
*
* @return false | array $answers_feedback{
* $type int $question_id
* $type string $question_feedback
* }
*/
public function get_user_answers_feedback( $lesson_id, $user_id = 0 ) {
$answers_feedback = array();
// get the user_id if none was passed in use the current logged in user
if ( ! intval( $user_id ) > 0 ) {
$user_id = get_current_user_id();
}
if ( ! intval( $lesson_id ) > 0 || 'lesson' !== get_post_type( $lesson_id )
|| ! intval( $user_id ) > 0 || ! get_userdata( $user_id ) ) {
return false;
}
// first check the transient to save a few split seconds
$transient_key = 'sensei_answers_feedback_' . $user_id . '_' . $lesson_id;
$encoded_feedback = get_transient( $transient_key );
// get the data if nothing was stored in the transient
if ( ! $encoded_feedback ) {
$quiz_id = (int) Sensei()->lesson->lesson_quizzes( $lesson_id );
$submission = Sensei()->quiz_submission_repository->get( $quiz_id, $user_id );
if ( ! $submission ) {
return false;
}
$encoded_feedback = array();
$grades = Sensei()->quiz_grade_repository->get_all( $submission->get_id() );
foreach ( $grades as $grade ) {
$encoded_feedback[ $grade->get_question_id() ] = $grade->get_feedback();
}
// set the transient with the new valid data for faster retrieval in future
if ( $encoded_feedback ) {
set_transient( $transient_key, $encoded_feedback, 10 * DAY_IN_SECONDS );
}
}
// if there is no data for this user
if ( ! is_array( $encoded_feedback ) ) {
return false;
}
foreach ( $encoded_feedback as $question_id => $feedback ) {
$answers_feedback[ $question_id ] = base64_decode( $feedback );
}
return $answers_feedback;
}
/**
* Get the user's answer feedback for a specific question.
*
* This function gives you a single answer note/feedback string
* for the user on the given question.
*
* @since 1.7.5
* @access public
*
* @param int $lesson_id Lesson ID.
* @param int $question_id Question ID.
* @param int $user_id User ID.
*
* @return string|bool Feedback or false if not found.
*/
public function get_user_question_feedback( $lesson_id, $question_id, $user_id = 0 ) {
$feedback = false;
// parameter validation
if ( empty( $lesson_id ) || empty( $question_id )
|| ! ( intval( $lesson_id ) > 0 )
|| ! ( intval( $question_id ) > 0 )
|| 'lesson' !== get_post_type( $lesson_id )
|| 'question' !== get_post_type( $question_id ) ) {
return false;
}
// get all the feedback for the user on the given lesson
$all_feedback = $this->get_user_answers_feedback( $lesson_id, $user_id );
if ( ! is_array( $all_feedback ) || empty( $all_feedback[ $question_id ] ) ) {
$feedback = get_post_meta( $question_id, '_answer_feedback', true );
$user_grade = $this->get_user_question_grade( $lesson_id, $question_id, $user_id );
$answer_correct = is_int( $user_grade ) && $user_grade > 0;
$feedback_block = $answer_correct ? self::get_correct_answer_feedback( $question_id ) : self::get_incorrect_answer_feedback( $question_id );
if ( $feedback_block ) {
$feedback = $feedback_block;
}
} else {
$feedback = $all_feedback[ $question_id ];
}
/**
* Filter the user question feedback.
*
* @since 1.9.12
*
* @hook sensei_user_question_feedback
*
* @param {string} $feedback The feedback.
* @param {int} $lesson_id The lesson ID.
* @param {int} $question_id The question ID.
* @param {int} $user_id The user ID.
* @return {string} The filtered feedback.
*/
return apply_filters( 'sensei_user_question_feedback', $feedback, $lesson_id, $question_id, $user_id );
}
/**
* Get a top-level inner block.
*
* @param int $question_id
* @param string $block_name
*
* @return array|null
*/
public static function get_question_inner_block( $question_id, $block_name ) {
$question = get_post( $question_id );
if ( has_blocks( $question->post_content ) ) {
$blocks = parse_blocks( $question->post_content );
foreach ( $blocks as $block ) {
if ( $block_name === $block['blockName'] ) {
return $block;
}
}
}
return null;
}
/**
* Get the contents for the correct answer feedback block.
*
* @param int $question_id Question Id.
* @return string block rendered
*/
public static function get_correct_answer_feedback( $question_id ) {
$block = self::get_correct_answer_feedback_block( $question_id );
return $block ? render_block( $block ) : '';
}
/**
* Get the contents for the incorrect answer feedback block.
*
* @access public
* @param int $question_id
*
* @return string
*/
public static function get_incorrect_answer_feedback( $question_id ) {
$block = self::get_incorrect_answer_feedback_block( $question_id );
return $block ? render_block( $block ) : '';
}
/**
* Get the contents for the correct answer feedback block.
*
* @access public
* @since 4.6.0
* @param int $question_id Question Id.
*
* @return array
*/
public static function get_correct_answer_feedback_block( $question_id ) {
return self::get_question_inner_block( $question_id, 'sensei-lms/quiz-question-feedback-correct' );
}
/**
* Get the contents for the incorrect answer feedback block.
*
* @since 4.6.0
* @access public
* @param int $question_id Question Id.
*
* @return array
*/
public static function get_incorrect_answer_feedback_block( $question_id ) {
return self::get_question_inner_block( $question_id, 'sensei-lms/quiz-question-feedback-incorrect' );
}
/**
* Check if a quiz has no questions, and redirect back to lesson.
*
* Though a quiz is created for each lesson, it should not be visible
* unless it has questions.
*
* @since 1.9.0
* @access public
* @return void
*/
public function quiz_has_no_questions() {
if ( ! is_singular( 'quiz' ) ) {
return;
}
global $post;
$lesson_id = $this->get_lesson_id( $post->ID );
$has_questions = Sensei_Lesson::lesson_quiz_has_questions( $lesson_id );
$lesson = get_post( $lesson_id );
if ( is_singular( 'quiz' ) && ! $has_questions && $_SERVER['REQUEST_URI'] !== "/lesson/$lesson->post_name" ) {
wp_redirect( get_permalink( $lesson->ID ), 301 );
exit;
}
}
/**
* Check if the quiz is available to the user.
*
* The quiz becomes available to the user if he is enrolled to the course
* and has completed the prerequisite (if any).
*
* @since 3.15.0
*
* @param int|null $quiz_id (Optional) The quiz post ID. Defaults to the current post ID.
* @param int|null $user_id (Optional) The user ID. Defaults to the current user ID.
*
* @return bool
*/
public static function is_quiz_available( int $quiz_id = null, int $user_id = null ): bool {
$quiz_id = $quiz_id ? $quiz_id : get_the_ID();
$user_id = $user_id ? $user_id : get_current_user_id();
$lesson_id = Sensei()->quiz->get_lesson_id( $quiz_id );
$course_id = (int) get_post_meta( $lesson_id, '_lesson_course', true );
// Check if the user has enrolled in the course.
if ( ! Sensei_Course::is_user_enrolled( $course_id, $user_id ) ) {
return false;
}
// Check if there is a lesson prerequisite and if the user has completed it.
$prerequisite_id = (int) get_post_meta( $lesson_id, '_lesson_prerequisite', true );
if (
$prerequisite_id
&& ! Sensei_Utils::user_completed_lesson( $prerequisite_id, $user_id )
) {
return false;
}
return true;
}
/**
* Check if the user has completed the quiz.
*
* @since 3.15.0
*
* @param int|null $quiz_id (Optional) The quiz post ID. Defaults to the current post ID.
* @param int|null $user_id (Optional) The user ID. Defaults to the current user ID.
*
* @return bool
*/
public static function is_quiz_completed( int $quiz_id = null, int $user_id = null ): bool {
$quiz_id = $quiz_id ? $quiz_id : get_the_ID();
$user_id = $user_id ? $user_id : get_current_user_id();
// Check the quiz progress status.
$quiz_progress = Sensei()->quiz_progress_repository->get( $quiz_id, $user_id );
if ( ! $quiz_progress ) {
return false;
}
if ( 'ungraded' === $quiz_progress->get_status() ) {
return true;
}
// Check for a quiz grade.
$submission = Sensei()->quiz_submission_repository->get( $quiz_id, $user_id );
if ( $submission && ! is_null( $submission->get_final_grade() ) ) {
return true;
}
return false;
}
/**
* Filter the single title and add the Quiz to it.
*
* @param string $title
* @param int $post_id title post id
*
* @return string $quiz_title
*/
public static function single_quiz_title( $title, $post_id = 0 ) {
if ( 'quiz' === get_post_type( $post_id ) ) {
$title_with_no_quizzes = $title;
// if the title has quiz, remove it: legacy titles have the word quiz stored.
if ( 1 < substr_count( strtoupper( $title_with_no_quizzes ), 'QUIZ' ) ) {
// remove all possible appearances of quiz
$title_with_no_quizzes = str_replace( 'quiz', '', $title );
$title_with_no_quizzes = str_replace( 'Quiz', '', $title_with_no_quizzes );
$title_with_no_quizzes = str_replace( 'QUIZ', '', $title_with_no_quizzes );
}
// translators: Placeholder is the quiz name with any instance of the word "quiz" removed.
$title = sprintf( __( '%s Quiz', 'sensei-lms' ), $title_with_no_quizzes );
/**
* Filter Sensei single title
*
* @hook sensei_single_title
*
* @param {string} $title The title.
* @param {string} $post_type The post type.
* @return {string} Filtered title.
*/
$title = apply_filters( 'sensei_single_title', $title, get_post_type() );
}
return $title;
}
/**
* Initialize the quiz question loop on the single quiz template
*
* The function will create a global quiz loop variable.
*
* @since 1.9.0
*/
public static function start_quiz_questions_loop() {
global $sensei_question_loop;
// Initialise the questions loop object.
$sensei_question_loop['current'] = -1;
$sensei_question_loop['total'] = 0;
$sensei_question_loop['questions'] = [];
$sensei_question_loop['questions_asked'] = [];
$sensei_question_loop['posts_per_page'] = -1;
$sensei_question_loop['current_page'] = 1;
$sensei_question_loop['total_pages'] = 1;
$quiz_id = get_the_ID();
$pagination_settings = json_decode(
get_post_meta( $quiz_id, '_pagination', true ),
true
);
if ( ! empty( $pagination_settings['pagination_number'] ) ) {
$sensei_question_loop['posts_per_page'] = (int) $pagination_settings['pagination_number'];
// phpcs:ignore WordPress.Security.NonceVerification -- Argument is used for pagination in the frontend.
if ( ! empty( $_GET['quiz-page'] ) ) {
// phpcs:ignore WordPress.Security.NonceVerification
$sensei_question_loop['current_page'] = max( 1, (int) $_GET['quiz-page'] );
}
}
// Fetch the questions.
$all_questions = Sensei()->lesson->lesson_quiz_questions( $quiz_id, 'publish' );
if ( ! $all_questions ) {
return;
}
$sensei_question_loop['questions_asked'] = wp_list_pluck( $all_questions, 'ID' );
$sensei_question_loop['total'] = is_countable( $all_questions ) ? count( $all_questions ) : 0;
// Paginate the questions.
if ( $sensei_question_loop['posts_per_page'] > 0 ) {
$offset = $sensei_question_loop['posts_per_page'] * ( $sensei_question_loop['current_page'] - 1 );
$loop_questions = array_slice( $all_questions, $offset, $sensei_question_loop['posts_per_page'] );
// Calculate the number of pages.
$sensei_question_loop['total_pages'] = (int) ceil(
$sensei_question_loop['total'] / $sensei_question_loop['posts_per_page']
);
} else {
$loop_questions = $all_questions;
}
// Don't use pagination if quiz has been completed.
$quiz_progress = Sensei()->quiz_progress_repository->get( $quiz_id, get_current_user_id() );
$quiz_completed = $quiz_progress && $quiz_progress->is_quiz_submitted();
$sensei_question_loop['questions'] = $quiz_completed ? $all_questions : $loop_questions;
$sensei_question_loop['quiz_id'] = $quiz_id;
}
/**
* Initialize the quiz question loop on the single quiz template
*
* The function will create a global quiz loop variable.
*
* @deprecated 3.10.0
*
* @since 1.9.0
*/
public static function stop_quiz_questions_loop() {
_deprecated_function( __METHOD__, '3.10.0' );
$sensei_question_loop = [];
$sensei_question_loop['total'] = 0;
$sensei_question_loop['questions'] = [];
$sensei_question_loop['questions_asked'] = [];
$sensei_question_loop['quiz_id'] = '';
$sensei_question_loop['posts_per_page'] = -1;
$sensei_question_loop['current_page'] = 1;
$sensei_question_loop['total_pages'] = 1;
}
/**
* Output the title for the single quiz page
*
* @since 1.9.0
*/
public static function the_title() {
?>
<header>
<h1>
<?php
/**
* Filter Sensei single title
*
* @hook sensei_single_title
*
* @param {string} $title The title.
* @param {string} $post_type The post type.
* @return {string} Filtered title.
*/
echo wp_kses_post( apply_filters( 'sensei_single_title', get_the_title( get_post() ), get_post_type( get_the_ID() ) ) );
?>
</h1>
</header>
<?php
}
/**
* Output the sensei quiz status message.
*
* @param int $quiz_id quiz id.
*/
public static function the_user_status_message( $quiz_id ) {
$lesson_id = Sensei()->quiz->get_lesson_id( $quiz_id );
$status = Sensei_Utils::sensei_user_quiz_status_message( $lesson_id, get_current_user_id() );
$messages = Sensei()->frontend->messages;
$message = '<div class="sensei-message ' . esc_attr( $status['box_class'] ) . '">' . wp_kses_post( $status['message'] ) . '</div>';
$messages = Sensei()->frontend->messages;
if ( ! empty( $messages ) ) {
$message .= wp_kses_post( $messages );
}
// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output escaped above.
echo $message;
}
/**
* Outputs the quiz hidden fields.
*
* @since 3.15.0
*/
public static function output_quiz_hidden_fields() {
global $sensei_question_loop;
foreach ( $sensei_question_loop['questions_asked'] as $question_id ) {
?>
<input type="hidden" name="questions_asked[]" form="sensei-quiz-form" value="<?php echo esc_attr( $question_id ); ?>">
<?php
}
}
/**
* Displays the quiz questions pagination when enabled from the quiz pagination settings.
* Replaces the default action buttons.
*
* @since 3.15.0
*/
public static function the_quiz_pagination() {
global $sensei_question_loop;
if ( $sensei_question_loop['total_pages'] <= 1 ) {
return;
}
wp_enqueue_script( 'sensei-stop-double-submission' );
// Remove the default action buttons. We will replace them in the pagination template.
remove_action( 'sensei_single_quiz_questions_after', array( 'Sensei_Quiz', 'action_buttons' ), 10 );
// Load the pagination template.
Sensei_Templates::get_template( 'single-quiz/pagination.php' );
}
/**
* Rendering html element that will be replaced with Progress Bar.
*
* @since 3.15.0
*/
public static function the_quiz_progress_bar() {
$quiz_id = get_the_ID();
$pagination_settings = json_decode(
get_post_meta( $quiz_id, '_pagination', true ),
true
);
global $sensei_question_loop;
// Make sure the quiz is paginated and the progress bar enabled.
if ( $sensei_question_loop['total_pages'] <= 1 || empty( $pagination_settings['show_progress_bar'] ) ) {
return;
}
$attributes = [
'radius' => $pagination_settings['progress_bar_radius'],
'height' => $pagination_settings['progress_bar_height'],
'customBarColor' => empty( $pagination_settings['progress_bar_color'] ) ? '' : $pagination_settings['progress_bar_color'],
'customBarBackgroundColor' => empty( $pagination_settings['progress_bar_background'] ) ? '' : $pagination_settings['progress_bar_background'],
];
Sensei()->assets->enqueue( 'sensei-shared-blocks-style', 'blocks/shared-style.scss' );
echo wp_kses_post( ( new Sensei_Block_Quiz_Progress() )->render( $attributes ) );
}
/**
* The quiz action buttons needed to output quiz
* action such as reset complete and save.
*
* @since 1.3.0
*/
public static function action_buttons() {
if ( ! self::is_quiz_available() ) {
return;
}
$lesson_id = Sensei()->quiz->get_lesson_id();
$is_quiz_completed = self::is_quiz_completed();
$is_reset_allowed = self::is_reset_allowed( $lesson_id );
$course_id = Sensei()->lesson->get_course_id( $lesson_id );
$is_learning_mode = Sensei_Course_Theme_Option::has_learning_mode_enabled( $course_id );
$is_awaiting_grade = self::is_quiz_awaiting_grade_for_user( $lesson_id, get_current_user_id() );
$post_grade_action = self::maybe_get_button_html_for_quiz_footer( $lesson_id, get_current_user_id() );
$show_grade_pending_button = $is_learning_mode && $is_awaiting_grade;
$wrapper_attributes = get_block_wrapper_attributes(
[
'class' => 'sensei-quiz-actions',
]
);
$has_actions = $is_reset_allowed || ! $is_quiz_completed || $show_grade_pending_button || ! empty( $post_grade_action );
if ( ! $has_actions ) {
return;
}
$button_inline_styles = self::get_button_inline_styles();
wp_enqueue_script( 'sensei-stop-double-submission' );
?>
<?php
echo sprintf(
'<div %s>',
$wrapper_attributes // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- No need to escape output of get_block_wrapper_attributes().
);
?>
<?php if ( ! $is_quiz_completed ) : ?>
<div class="sensei-quiz-actions-primary wp-block-buttons">
<div class="sensei-quiz-action wp-block-button">
<button
type="submit"
name="quiz_complete"
form="sensei-quiz-form"
class="wp-block-button__link button quiz-submit complete sensei-course-theme__button sensei-stop-double-submission"
style="<?php echo esc_attr( $button_inline_styles ); ?>"
>
<?php esc_html_e( 'Complete Quiz', 'sensei-lms' ); ?>
</button>
<input type="hidden" name="woothemes_sensei_complete_quiz_nonce" form="sensei-quiz-form" id="woothemes_sensei_complete_quiz_nonce" value="<?php echo esc_attr( wp_create_nonce( 'woothemes_sensei_complete_quiz_nonce' ) ); ?>" />
</div>
</div>
<?php endif ?>
<?php if ( $is_learning_mode && $post_grade_action ) : ?>
<?php
$allowed_html = self::get_allowed_html_for_modal_form();
echo wp_kses( $post_grade_action, $allowed_html );
?>
<?php endif ?>
<?php if ( $is_awaiting_grade && $is_learning_mode ) : ?>
<button type="button" class="wp-element-button sensei-course-theme__button is-primary" disabled>
<?php esc_html_e( 'Pending teacher grade', 'sensei-lms' ); ?>
</button>
<?php endif ?>
<div class="sensei-quiz-actions-secondary">
<?php if ( $is_reset_allowed ) : ?>
<div class="sensei-quiz-action">
<button type="submit" name="quiz_reset" form="sensei-quiz-form" class="quiz-submit reset sensei-stop-double-submission sensei-course-theme__button is-link">
<?php esc_html_e( 'Restart Quiz', 'sensei-lms' ); ?>
</button>
<input type="hidden" name="woothemes_sensei_reset_quiz_nonce" form="sensei-quiz-form" id="woothemes_sensei_reset_quiz_nonce" value="<?php echo esc_attr( wp_create_nonce( 'woothemes_sensei_reset_quiz_nonce' ) ); ?>" />
</div>
<?php endif ?>
<?php if ( ! $is_quiz_completed ) : ?>
<div class="sensei-quiz-action">
<button type="submit" name="quiz_save" form="sensei-quiz-form" class="quiz-submit save sensei-stop-double-submission">
<?php esc_html_e( 'Save Progress', 'sensei-lms' ); ?>
</button>
<input type="hidden" name="woothemes_sensei_save_quiz_nonce" form="sensei-quiz-form" id="woothemes_sensei_save_quiz_nonce" value="<?php echo esc_attr( wp_create_nonce( 'woothemes_sensei_save_quiz_nonce' ) ); ?>" />
</div>
<?php endif ?>
</div>
</div>
<?php
}
/**
* Get the quiz button inline styles.
*
* @since 3.15.0
*
* @param int|null $quiz_id (Optional) The quiz post ID. Defaults to the current post ID.
*
* @return string
*/
public static function get_button_inline_styles( int $quiz_id = null ): string {
$quiz_id = $quiz_id ? $quiz_id : get_the_ID();
$button_text_color = get_post_meta( $quiz_id, '_button_text_color', true );
$button_background_color = get_post_meta( $quiz_id, '_button_background_color', true );
$styles = [];
if ( $button_text_color ) {
$styles[] = sprintf( 'color: %s', $button_text_color );
}
if ( $button_background_color ) {
$styles[] = sprintf( 'background-color: %s', $button_background_color );
}
return implode( '; ', $styles );
}
/**
* Fetch the quiz grade
*
* @since 1.9.0
*
* @param int $lesson_id
* @param int $user_id
*
* @return double $user_quiz_grade
*/
public static function get_user_quiz_grade( int $lesson_id, int $user_id ): float {
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
if ( ! $quiz_id ) {
return 0;
}
$quiz_submission = Sensei()->quiz_submission_repository->get( $quiz_id, $user_id );
if ( ! $quiz_submission ) {
return 0;
}
return (float) $quiz_submission->get_final_grade();
}
/**
* Check the quiz reset property for a given lesson's quiz.
*
* The data is stored on the quiz but going forward the quiz post
* type will be retired, hence the lesson_id is a require parameter.
*
* @since 1.9.0
*
* @param int $lesson_id
* @return bool
*/
public static function is_reset_allowed( $lesson_id ) {
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
$reset_allowed = get_post_meta( $quiz_id, '_enable_quiz_reset', true );
// backwards compatibility.
if ( 'on' === $reset_allowed ) {
$reset_allowed = 1;
}
return (bool) $reset_allowed;
}
/**
* Get a quiz option's value.
*
* @since 3.14.0
*
* @param int $lesson_id Lesson ID.
* @param string $option Option name.
* @param mixed $default Default value to be returned if the option is unset.
*
* @return mixed
*/
public static function get_option( $lesson_id, $option, $default = null ) {
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
$option = get_post_meta( $quiz_id, '_' . $option, true );
if ( ! $option ) {
return $default;
} else {
return 'yes' === $option;
}
}
/**
* Checking if password is required.
*
* @param int $lesson_id lesson id.
*
* @return bool
*/
public static function is_pass_required( $lesson_id ) {
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
$reset_allowed = get_post_meta( $quiz_id, '_pass_required', true );
// backwards compatibility.
if ( 'on' === $reset_allowed ) {
$reset_allowed = 1;
}
return (bool) $reset_allowed;
}
/**
* Maybe delete the quiz post after checking if the post exists.
*
* @since 1.9.5
*
* @param integer $post_id of the post being permanently deleted.
*/
public function maybe_delete_quiz( $post_id ) {
$quiz_id = Sensei()->lesson->lesson_quizzes( $post_id );
if ( empty( $quiz_id ) || 'lesson' !== get_post_type( $post_id ) ) {
return;
}
wp_delete_post( $quiz_id );
}
/**
* Merge quiz answers with questions asked.
*
* Also, remove any question_ids not part of
* the question set for this lesson quiz.
*
* @param array $questions_answered The user answers.
* @param array $questions_asked The ID's of all the asked quiz questions.
* @return array
*/
private function merge_quiz_answers_with_questions_asked( array $questions_answered, array $questions_asked ): array {
$merged = [];
foreach ( array_unique( $questions_asked ) as $question_id ) {
$merged[ $question_id ] = $questions_answered[ $question_id ] ?? '';
}
return $merged;
}
/**
* Get all the questions of a quiz or get all complete questions if filtering flag is true and is not preview.
*
* @param int $quiz_id The quiz id.
* @param string $post_status Question post status.
* @param string $orderby Question order by.
* @param string $order Question order.
* @param bool $filter_incomplete_questions Whether incomplete questions must be filtered out or not. Default false.
* @return WP_Post[]
*/
public function get_questions( $quiz_id, $post_status = 'any', $orderby = 'meta_value_num title', $order = 'ASC', $filter_incomplete_questions = false ) : array {
// Set the default question order if it has not already been set for this quiz.
Sensei()->lesson->set_default_question_order( $quiz_id );
// Get all questions and multiple questions.
$question_query_args = array(
'post_type' => array( 'question', 'multiple_question' ),
'posts_per_page' => - 1,
'meta_key' => '_quiz_question_order' . $quiz_id, // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_key -- Query limited by the number of questions.
'orderby' => $orderby,
'order' => $order,
'meta_query' => array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query -- Query limited by the number of questions.
array(
'key' => '_quiz_id',
'value' => $quiz_id,
),
),
'post_status' => $post_status,
'suppress_filters' => 0,
);
$questions_query = new WP_Query( $question_query_args );
$posts = $questions_query->posts;
if ( is_preview() || ! $filter_incomplete_questions ) {
return $posts;
}
return $this->filter_out_incomplete_questions( $posts );
}
/**
* Filter out incomplete questions.
*
* @param array $questions All questions.
*
* @return array
*/
private function filter_out_incomplete_questions( array $questions ): array {
$filtered_questions = [];
foreach ( $questions as $question ) {
$question_id = $question->ID;
$question_type = Sensei()->question->get_question_type( $question_id );
if ( 'multiple-choice' === $question_type && ! $this->is_multiple_choice_question_complete( $question_id ) ) {
continue;
}
if ( 'gap-fill' === $question_type && ! $this->is_gap_fill_question_complete( $question_id ) ) {
continue;
}
array_push( $filtered_questions, $question );
}
return $filtered_questions;
}
/**
* Return true if multiple choice question has valid answers
*
* @param int $question_id question id.
*
* @return boolean
*/
private function is_multiple_choice_question_complete( int $question_id ): bool {
$right_answers = get_post_meta( $question_id, '_question_right_answer', true );
$wrong_answers = get_post_meta( $question_id, '_question_wrong_answers', true );
// Multiple choice question is incomplete if there isn't at least one right and one wrong answer.
if ( ! is_array( $right_answers ) || count( $right_answers ) < 1 || ! is_array( $wrong_answers ) || count( $wrong_answers ) < 1 ) {
return false;
}
// Wrong or right answers values can't be whitespace.
return ! count(
array_filter(
array_merge( $right_answers, $wrong_answers ),
function( $value ) {
return '' === trim( $value );
}
)
);
}
/**
* Return true if gap fill question has valid answers
*
* @param int $question_id question id.
*
* @return boolean
*/
private function is_gap_fill_question_complete( int $question_id ): bool {
$gapfill_array = explode( '||', get_post_meta( $question_id, '_question_right_answer', true ) );
$text_before = $gapfill_array[0] ?? '';
$answer_text = $gapfill_array[1] ?? '';
$text_after = $gapfill_array[2] ?? '';
// Gap fill question is incomplete if gap text is null or whitespace, or if text before or text after are null or whitespace.
return ! ( '' === trim( $answer_text ) || ( '' === trim( $text_before ) && '' === trim( $text_after ) ) );
}
/**
* Sets the questions of a quiz. It handles all related quiz and question meta.
*
* @param int $quiz_id The quiz id.
* @param array $question_ids The array of questions ids.
*/
public function set_questions( int $quiz_id, array $question_ids ) {
$old_question_order = get_post_meta( $quiz_id, '_question_order', true );
$old_question_order = empty( $old_question_order ) ? [] : array_map( 'intval', $old_question_order );
if ( $question_ids === $old_question_order ) {
return;
}
$added_questions = array_diff( $question_ids, $old_question_order );
$removed_questions = array_diff( $old_question_order, $question_ids );
// Delete question meta from the questions that were removed from the quiz.
if ( ! empty( $removed_questions ) ) {
$this->delete_quiz_question_meta( $quiz_id, $removed_questions );
}
if ( empty( $question_ids ) ) {
delete_post_meta( $this->get_lesson_id( $quiz_id ), '_quiz_has_questions' );
delete_post_meta( $quiz_id, '_question_order' );
return;
}
$question_count = 1;
foreach ( $question_ids as $question_id ) {
update_post_meta( $question_id, '_quiz_question_order' . $quiz_id, $quiz_id . '000' . $question_count );
$question_count++;
}
foreach ( $added_questions as $added_question ) {
add_post_meta( $added_question, '_quiz_id', $quiz_id, false );
}
update_post_meta( $this->get_lesson_id( $quiz_id ), '_quiz_has_questions', '1' );
update_post_meta( $quiz_id, '_question_order', array_map( 'strval', $question_ids ) );
}
/**
* Check if a quiz's lesson has Sensei blocks.
*
* @param int|WP_Post $quiz Quiz ID or post object.
*
* @return bool
*/
public function has_sensei_blocks( $quiz = null ) {
$lesson_id = $this->get_lesson_id( $quiz );
return Sensei()->lesson->has_sensei_blocks( $lesson_id );
}
/**
* Add quiz-blocks class for quiz page with block-based lesson.
*
* @param array $classes Existing classes.
*
* @return array Modified classes.
*/
public function add_quiz_blocks_class( $classes ) {
if ( 'quiz' === get_post_type() && $this->has_sensei_blocks() ) {
return array_merge( $classes, [ 'quiz-blocks' ] );
}
return $classes;
}
/**
* Helper method to delete all related meta of quiz's questions.
*
* @param int $quiz_id The quiz id.
* @param array $question_ids A list of quiz ids to remove the meta from.
*/
private function delete_quiz_question_meta( $quiz_id, $question_ids = null ) {
if ( null === $question_ids ) {
$question_ids = get_post_meta( $quiz_id, '_question_order', true );
}
if ( empty( $question_ids ) ) {
return;
}
foreach ( $question_ids as $question_id ) {
delete_post_meta( $question_id, '_quiz_id', $quiz_id );
delete_post_meta( $question_id, '_quiz_question_order' . $quiz_id );
if (
'multiple_question' === get_post_type( $question_id )
&& empty( array_filter( get_post_meta( $question_id, '_quiz_id', false ) ) )
) {
wp_delete_post( $question_id, true );
}
}
}
/**
* Update the quiz author.
*
* @param int $quiz_id Quiz post ID.
* @param int $new_author_id New author.
*/
public function update_quiz_author( int $quiz_id, int $new_author_id ) {
if ( 'quiz' !== get_post_type( $quiz_id ) ) {
return;
}
wp_update_post(
[
'ID' => $quiz_id,
'post_author' => $new_author_id,
]
);
// Update quiz question author if possible.
$questions = Sensei()->quiz->get_questions( $quiz_id );
foreach ( $questions as $question ) {
if ( $new_author_id === (int) $question->post_author ) {
continue;
}
Sensei()->question->maybe_update_question_author( $question->ID, $new_author_id );
}
}
/**
* Replace all pagination links with buttons (<a> => <button>).
*
* @since 3.15.0
*
* @param string $html The pagination html.
*
* @return string
*/
public function replace_pagination_links_with_buttons( $html ): string {
return preg_replace(
'/<a.+?href="(.+?)">(.+?)<\/a>/',
'<button type="submit" name="quiz_target_page" form="sensei-quiz-form" value="$1" class="page-numbers">$2</button>',
$html
);
}
/**
* Create a quiz progress record for a student when they visit the quiz for the first time.
*
* @access private
*
* @param int|string $quiz_id The quiz ID.
* @param int|string $user_id The user ID.
*/
public function maybe_create_quiz_progress( $quiz_id = '', $user_id = '' ): void {
$tables_based_progress_feature = Sensei()->feature_flags->is_enabled( 'tables_based_progress' );
if ( ! $tables_based_progress_feature ) {
return;
}
if ( empty( $quiz_id ) || ! is_int( $quiz_id ) ) {
$quiz_id = get_the_ID();
}
if ( empty( $user_id ) || ! is_int( $user_id ) ) {
$user_id = get_current_user_id();
}
if ( empty( $quiz_id ) || empty( $user_id ) || 'quiz' !== get_post_type( $quiz_id ) ) {
return;
}
$quiz_available = static::is_quiz_available( $quiz_id, $user_id );
if ( ! $quiz_available ) {
return;
}
$quiz_progress_repository = Sensei()->quiz_progress_repository_factory->create_tables_based_repository();
$quiz_progress = $quiz_progress_repository->get( $quiz_id, $user_id );
if ( $quiz_progress ) {
return;
}
$quiz_progress_repository->create( $quiz_id, $user_id );
}
/**
* Check if the quiz is in ungraded state for a user.
*
* @param ?int $lesson_id The lesson ID.
* @param ?int $user_id The user ID.
*
* @return bool True if the quiz is in ungraded state for the user, false otherwise.
*/
public static function is_quiz_awaiting_grade_for_user( $lesson_id = null, $user_id = null ) {
if ( empty( $lesson_id ) ) {
$lesson_id = Sensei()->quiz->get_lesson_id();
}
if ( empty( $user_id ) ) {
$user_id = get_current_user_id();
}
if ( empty( $lesson_id ) || empty( $user_id ) || 'lesson' !== get_post_type( $lesson_id ) ) {
return false;
}
$quiz_id = Sensei()->lesson->lesson_quizzes( $lesson_id );
if ( ! $quiz_id ) {
return false;
}
$progress = Sensei()->quiz_progress_repository->get( $quiz_id, $user_id );
return $progress && Quiz_Progress_Interface::STATUS_UNGRADED === $progress->get_status();
}
/**
* Returns the HTML for the next lesson button or the contact Teacher button based on condition.
* If none of the conditions are met, returns null.
*
* @param ?int $lesson_id The lesson ID.
* @param ?int $user_id The user ID.
*
* @return string|null Next lesson or Contact Teacher button if condition holds, null otherwise.
*/
private static function maybe_get_button_html_for_quiz_footer( $lesson_id = null, $user_id = null ) {
if ( empty( $lesson_id ) ) {
$lesson_id = Sensei()->quiz->get_lesson_id();
}
if ( empty( $user_id ) ) {
$user_id = get_current_user_id();
}
if ( empty( $lesson_id ) || empty( $user_id ) || 'lesson' !== get_post_type( $lesson_id ) || 'quiz' !== get_post_type() ) {
return null;
}
$quiz_id = (int) Sensei()->lesson->lesson_quizzes( $lesson_id );
$quiz_progress = Sensei()->quiz_progress_repository->get( $quiz_id, $user_id );
if ( ! $quiz_progress || ! $quiz_progress->is_quiz_completed() ) {
return null;
}
$is_pass_required = Sensei()->lesson->lesson_has_quiz_with_questions_and_pass_required( $lesson_id );
$is_reset_allowed = self::is_reset_allowed( $lesson_id );
if ( $is_pass_required && Quiz_Progress_Interface::STATUS_FAILED === $quiz_progress->get_status() ) {
if ( $is_reset_allowed ) {
return null;
}
$block = new Sensei_Block_Contact_Teacher();
$button = self::get_primary_button_html( __( 'Contact teacher', 'sensei-lms' ), '#' );
return $block->render_contact_teacher_block( [], $button );
}
$prev_next_urls = sensei_get_prev_next_lessons( $lesson_id );
$next_lesson_url = $prev_next_urls['next']['url'] ?? null;
if ( $next_lesson_url ) {
return self::get_primary_button_html( __( 'Continue to next lesson', 'sensei-lms' ), $next_lesson_url );
}
return null;
}
/**
* Returns the HTML for a primary button anchor.
*
* @param string $button_text The button text.
* @param string|null $url The URL.
* @param array $classes CSS classes to add to the button.
*
* @return string The HTML for the primary button anchor.
*/
public static function get_primary_button_html( $button_text, $url = null, $classes = [] ) {
$href = '';
$classes = array_merge(
array(
'wp-block-button__link',
'wp-element-button',
'sensei-course-theme__button',
'is-primary',
),
$classes
);
if ( $url ) {
$href = ' href="' . esc_url( $url ) . '"';
}
return (
'<div class="wp-block-button">
<a class="' . esc_attr( implode( ' ', $classes ) ) . '"' . $href . '>' .
esc_html( $button_text ) .
'</a>
</div>'
);
}
/**
* Returns allowed HTML elements apart from posts for Kses.
*
* @return array Allowed HTML for modal forms in Kses.
*/
public static function get_allowed_html_for_modal_form() {
return array_merge(
wp_kses_allowed_html( 'post' ),
array(
'form' => array(
'action' => array(),
'class' => array(),
'method' => array(),
'name' => array(),
'onsubmit' => array(),
),
'input' => array(
'class' => array(),
'name' => array(),
'type' => array(),
'value' => array(),
'id' => array(),
),
'textarea' => array(
'name' => array(),
'placeholder' => array(),
'rows' => array(),
'required' => array(),
),
'svg' => array(
'class' => array(),
),
'use' => array(
'href' => array(),
),
)
);
}
}
/**
* Class WooThemes_Sensei_Quiz
*
* @ignore only for backward compatibility
* @since 1.9.0
*/
class WooThemes_Sensei_Quiz extends Sensei_Quiz{}