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<?php
/**
 * Manage Gutenberg
 *
 * @package Tutor
 * @author Themeum <support@themeum.com>
 * @link https://themeum.com
 * @since 1.0.0
 */

namespace TUTOR;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Gutenberg class
 *
 * @since 1.0.0
 */
class Gutenberg {
	/**
	 * Constructor
	 *
	 * @since 1.0.0
	 * @return void|null
	 */
	public function __construct() {
		if ( ! function_exists( 'register_block_type' ) ) {
			return;
		}

add_action( 'init', array( $this, 'register_blocks' ) );
		add_filter( 'block_categories_all', array( $this, 'registering_new_block_category' ), 10, 2 );
		add_action( 'wp_ajax_render_block_tutor', array( $this, 'render_block_tutor' ) );
		add_filter( 'rest_user_query', array( $this, 'author_list_dropdown' ), 10, 2 );
	}

/**
	 * Bind author list on gutenberg editor mode
	 *
	 * @since 2.1.0
	 *
	 * @param array           $prepared_args arguments.
	 * @param WP_REST_Request $request WP REST request object.
	 *
	 * @return array
	 */
	public function author_list_dropdown( $prepared_args, $request ) {
		$url   = $request->get_header( 'referer' );
		$parts = parse_url( $url );
		if ( ! isset( $parts['query'] ) ) {
			return $prepared_args;
		}

parse_str( $parts['query'], $query );
		$post_id = isset( $query['post'] ) ? (int) $query['post'] : 0;

if ( ! $post_id ) {
			return $prepared_args;
		}

$post = get_post( $post_id );

if ( tutor()->course_post_type === $post->post_type && tutor_utils()->get_option( 'enable_gutenberg_course_edit' ) === true ) {
			// Modify the wp/v2/users endpoint request from gutenberg editor.
			unset( $prepared_args['who'] );
			$prepared_args['role__in'] = array( 'administrator', 'tutor_instructor' );
		}

return $prepared_args;
	}

/**
	 * Register blocks
	 *
	 * @since 1.0.0
	 * @return void
	 */
	public function register_blocks() {
		global $pagenow;
		if ( 'widgets.php' !== $pagenow ) {
			wp_register_script(
				'tutor-student-registration-block',
				tutor()->url . 'assets/lib/gutenberg_blocks.js',
				array( 'wp-blocks', 'wp-i18n', 'wp-element', 'wp-components', 'wp-editor' ),
				TUTOR_VERSION
			);
		}

register_block_type(
			'tutor-gutenberg/student-registration',
			array(
				'editor_script'   => 'tutor-student-registration-block',
				'render_callback' => array( $this, 'render_block_student_registration' ),
			)
		);

register_block_type(
			'tutor-gutenberg/instructor-registration',
			array(
				'editor_script'   => 'tutor-student-registration-block',
				'render_callback' => array( $this, 'render_block_tutor_instructor_registration_form' ),
			)
		);

// Check if WP version is equal to or greater than 5.9.
		global $wp_version;
		if ( version_compare( $wp_version, '5.9', '>=' ) && function_exists( 'wp_is_block_theme' ) && wp_is_block_theme() ) {
			wp_localize_script(
				'tutor-student-registration-block',
				'_tutor_gutenberg_block_data',
				array(
					'is_wp_version_5_9' => 'true',
				)
			);
		} else {
			wp_localize_script(
				'tutor-student-registration-block',
				'_tutor_gutenberg_block_data',
				array(
					'is_wp_version_5_9' => 'false',
				)
			);
		}
	}

/**
	 * Register new category block
	 *
	 * @since 1.0.0
	 *
	 * @param array  $categories categories.
	 * @param object $post post object.
	 *
	 * @return array
	 */
	public function registering_new_block_category( $categories, $post ) {
		return array_merge(
			array(
				array(
					'slug'  => 'tutor',
					'title' => __( 'Tutor LMS', 'tutor' ),
				),
			),
			$categories
		);
	}

/**
	 * Render student registration block
	 *
	 * @since 1.0.0
	 *
	 * @param array $args arguments.
	 * @return mixed
	 */
	public function render_block_student_registration( $args ) {
		return do_shortcode( '[tutor_student_registration_form]' );
	}

/**
	 * Render dashboard block
	 *
	 * @since 1.0.0
	 *
	 * @param array $args arguments.
	 * @return mixed
	 */
	public function render_block_tutor_dashboard( $args ) {
		return do_shortcode( '[tutor_dashboard]' );
	}

/**
	 * Render instructor registration block
	 *
	 * @since 1.0.0
	 *
	 * @param array $args arguments.
	 * @return mixed
	 */
	public function render_block_tutor_instructor_registration_form( $args ) {
		return do_shortcode( '[tutor_instructor_registration_form]' );
	}

/**
	 * Render tutor block for editor
	 *
	 * @since 1.0.0
	 * @return void
	 */
	public function render_block_tutor() {
		tutor_utils()->checking_nonce();

$shortcode = Input::post( 'shortcode' );

$allowed_shortcode = array(
			'tutor_instructor_registration_form',
			'tutor_student_registration_form',
		);

if ( ! in_array( $shortcode, $allowed_shortcode ) ) {
			wp_send_json_error();
		}

wp_send_json_success( do_shortcode( "[{$shortcode}]" ) );
	}

}