bp_activity_add_meta_boxes()

function bp_activity_add_meta_boxes() {
	global $post;

	if ( ! bp_is_active( 'activity' ) ) {
		return;
	}

	$post_ID = $post->ID;

	if (
		(
			'sfwd-courses' == $post->post_type
			|| 'sfwd-lessons' == $post->post_type
			|| 'sfwd-topic' == $post->post_type
			|| 'sfwd-quiz' == $post->post_type
		)
		&& !post_type_supports( $post->post_type, 'buddypress-activity' )
	) {
		return;
	}

	// Add Activity when course is published.
	if (
		'sfwd-courses' == $post->post_type
		&& $post->post_status == 'publish'
		&& post_type_supports( 'sfwd-courses', 'buddypress-activity' )
	) {

		$lesson_bb = learndash_get_course_lessons_list( $post_ID );
		$quizz = learndash_get_course_quiz_list( $post_ID );

		if ( !empty( $lesson_bb ) && post_type_supports( 'sfwd-lessons', 'buddypress-activity' ) ) {
			foreach ( $lesson_bb as $lesson ) {
				bp_activity_post_type_publish( $lesson['post']->ID, $lesson['post'] );
			}
		}

		if ( !empty( $quizz ) && post_type_supports( 'sfwd-quiz', 'buddypress-activity' ) ) {
			foreach ( $quizz as $quiz ) {
				bp_activity_post_type_publish( $quiz['post']->ID, $quiz['post'] );
			}
		}

		if ( !empty( $lesson_bb ) && post_type_supports( 'sfwd-topic', 'buddypress-activity' ) ) {
			foreach ( $lesson_bb as $lesson ) {
				$topics = learndash_get_topic_list( $lesson['post']->ID, $post_ID );
				if ( !empty( $topics ) ) {
					foreach ( $topics as $topic ) {
						bp_activity_post_type_publish( $topic->ID, $topic );
					}
				}
			}
		}

		if ( !empty( $lesson_bb ) && post_type_supports( 'sfwd-quiz', 'buddypress-activity' ) ) {
			foreach ( $lesson_bb as $lesson ) {
				$lesson_quiz = learndash_get_lesson_quiz_list( $lesson['post']->ID );
				if ( !empty( $lesson_quiz ) ) {
					foreach ( $lesson_quiz as $quiz ) {
						bp_activity_post_type_publish( $quiz['post']->ID, $quiz['post'] );
					}
				}
			}
		}
	}

	// Add Activity when lesson published correctly.
	else if (
		'sfwd-lessons' == $post->post_type
		&& $post->post_status == 'publish'
		&& post_type_supports( 'sfwd-lessons', 'buddypress-activity' )
	) {
		if (
			(
				empty( get_post_meta( $post_ID, 'course_id', true ) )
				&& learndash_is_sample( $post_ID )
			)
			|| (
				!empty( get_post_meta( $post_ID, 'course_id', true ) )
				&& 'publish' == get_post_status( get_post_meta( $post_ID, 'course_id', true ) )
			)
			|| learndash_is_sample( $post_ID )
		) {
			bp_activity_post_type_publish( $post_ID, $post );
		}
	}

	// Add Activity when topic published correctly.
	else if (
		'sfwd-topic' == $post->post_type
		&& $post->post_status == 'publish'
		&& post_type_supports( 'sfwd-topic', 'buddypress-activity' )
	) {
		if (
			   !empty( get_post_meta( $post_ID, 'course_id', true ) )
			&& !empty( get_post_meta( $post_ID, 'lesson_id', true ) )
			&& 'future' === get_post_status( get_post_meta( $post_ID, 'course_id', true ) )
			&& 'future' === get_post_status( get_post_meta( $post_ID, 'lesson_id', true ) )
		) {
			bp_activity_post_type_publish( $post_ID, $post );
		}
	}

	// Add Activity when quiz published correctly.
	else if (
		'sfwd-quiz' == $post->post_type
		&& $post->post_status == 'publish'
		&& post_type_supports( 'sfwd-quiz', 'buddypress-activity' )
	) {
		if (
			(
				!empty( get_post_meta( $post_ID, 'course_id', true ) )
				&& 'future' === get_post_status( get_post_meta( $post_ID, 'course_id', true ) )
			)
			|| (
				!empty( get_post_meta( $post_ID, 'lesson_id', true ) )
				&& 'future' === get_post_status( get_post_meta( $post_ID, 'lesson_id', true ) )
			)
		) {
			bp_activity_post_type_publish( $post_ID, $post );
		}
	}
}