<?php
namespace Academy\Shortcode;

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

class AcademyCourseInstructors {

	public function __construct() {
		add_shortcode('academy_course_instructors', [
			$this,
			'course_instructors',
		]);
	}

	public function course_instructors( $attributes, $content = '' ) {
		$course_id = AcademySingleCourse::resolve_course_id( $attributes );
		if ( ! $course_id ) {
			return AcademySingleCourse::missing_course_notice();
		}
		$author_id = (int) get_post_field( 'post_author', $course_id );
		if ( \Academy\Helper::get_addon_active_status( 'multi_instructor' ) ) {
			$instructors = (array) \Academy\Helper::get_instructors_by_course_id( $course_id );
			// A course saved before Multi Instructor was turned on has no
			// instructor list yet: its author teaches it.
			if ( ! $instructors ) {
				$instructors = (array) \Academy\Helper::get_instructor_by_author_id( $author_id );
			}
		} else {
			$instructors = (array) \Academy\Helper::get_instructor_by_author_id( $author_id );
		}
		$instructor_reviews_status = (bool) \Academy\Helper::get_settings( 'is_enabled_instructor_review', true );
		if ( $instructors ) {
			ob_start();
			\Academy\Helper::get_template(
				'single-course/instructors.php',
				apply_filters(
					'academy/single_course_content_instructors_args',
					[
						'instructors' => $instructors,
						'instructor_reviews_status' => $instructor_reviews_status,
					]
				)
			);
			$output = ob_get_clean();
			return apply_filters( 'academy/templates/shortcode/course_instructors', $output );
		}
	}
}