public function front_save_course(){
		$course_id = dozent_input_text( 'frontend_course_id' );
		$course_title = dozent_input_text( 'course_title' );
		$short_description = dozent_input_textarea( 'short_description' );
		$course_description = ! empty( $_POST[ 'course_description' ] ) ? wp_kses_post( $_POST[ 'course_description' ] ) : '';
		$course_thumbnail = (int) dozent_input_textarea( 'course_thumbnail' );
		$save_type = dozent_input_text( 'save_type' );

		$front_course = get_post( $course_id );
		$tax_input = dozent_input_array_field( 'tax_input' );

		$course_data = [
			'ID'            => $course_id,
			'post_title'    => $course_title,
			'post_name'     => sanitize_title( $course_title ),
			'post_content'  => $course_description,
			'post_excerpt'  => $short_description,
		];

		/**
		 * Course Publish, save as draft or submit for review.
		 */

		if ( $save_type === 'save' ){
			$course_data['post_status'] = 'draft';
		}else{
			if ( current_user_can( 'instructor_can_publish_course' ) ){
				$course_data['post_status'] = 'publish';
			}else{
				$course_data['post_status'] = 'pending';
			}
		}

		wp_update_post( $course_data );

		/**
		 * Update or remove thumbnail
		 */

		if ( $course_thumbnail ){
			update_post_meta( $course_id , '_thumbnail_id', $course_thumbnail);
		} else {
			delete_post_meta( $course_id , '_thumbnail_id' );
		}

		/**
		 * Adding course categories
		 */

		if ( dozent_count( $tax_input ) ) {
			foreach ( $tax_input as $taxonomy => $tags ) {
				$taxonomy_obj = get_taxonomy( $taxonomy );
				if ( ! $taxonomy_obj ) {
					/* translators: %s: taxonomy name */
					_doing_it_wrong( __FUNCTION__, sprintf( __( 'Invalid taxonomy: %s.', 'dozent' ), $taxonomy ), '4.4.0' );
					continue;
				}

				// array = hierarchical, string = non-hierarchical.
				if ( is_array( $tags ) ) {
					$tags = array_filter( $tags );
				}
				wp_set_post_terms( $course_id, $tags, $taxonomy );
			}
		}

		/**
		 * Supports for others meta save
		 */

		$redirect_url = null;
		if ( $front_course->post_status === 'auto-draft' ){
			$redirect_url = dozent_get_dashboard_permalink( 'my-courses/create-course' );
			$redirect_url = add_query_arg( [ 'course_id' => $course_id ], $redirect_url );
		}

		if ( $save_type === 'publish' ){
			$redirect_url = dozent_get_dashboard_permalink( 'my-courses' );
		}

		$response = [
			'redirect_url'  => $redirect_url,
		];

		wp_send_json_success( $response );
	}