<?php

class grassblade_masterstudy_lms_legacy {

	static function get_course_steps_legacy(int $course_id) {

		$steps_ids = $lesson_ids = $quiz_ids = array();
		$curriculum_steps = STM_LMS_Curriculum::get_items($course_id);

		foreach($curriculum_steps as $step){
			if($step['item_type'] == 'stm-lessons'){
				$lesson_ids[] = $step['item_id'];
			}
			if($step['item_type'] == 'stm-quizzes'){
				$quiz_ids[] = $step['item_id'];
			}
		}

		$steps_ids = array_merge($quiz_ids, $lesson_ids);
		return array( "lesson_ids" => $lesson_ids, "quiz_ids" => $quiz_ids, "steps_ids" => $steps_ids);
	}

    static function get_course_ids_legacy(int $post_id){
		if( empty($post_id) )
			return array();

		$courses = STM_LMS_Curriculum::get_items_by_item($post_id, array('course_id'));

		$course_ids = [];
		foreach($courses as $course){
			$course_ids[] = $course['course_id'];
		}

		return $course_ids;
	}

    static function course_structure_legacy(int $course_id){

		$lesson_ids = $quiz_ids = $section_items = array();
		$curriculum = get_post_meta($course_id, 'curriculum', true);
		$curriculum = explode(',', $curriculum);
		$sections   = STM_LMS_Lesson::create_sections($curriculum);

		foreach( $sections as $section ) {
			$section_items[ $section["number"] ] = array();

			foreach($section['items'] as $post){
				$p = get_post($post);
				if(empty($p->ID))
				continue;

				if($p->post_type == 'stm-lessons'){
					$lesson_ids[] = $p->ID;
					$section_items[ $section["number"] ][$p->post_type][] = $p->ID;
				}
				if($p->post_type == 'stm-quizzes'){
					$quiz_ids[] = $p->ID;
					$section_items[ $section["number"] ][$p->post_type][] = $p->ID;
				}
			}
		}
		return [ "section_items" => $section_items, "lesson_ids" => $lesson_ids, "quiz_ids" => $quiz_ids, 'sections' => $sections ];
	}
}