CLearnAccessMacroses::CanUserViewLessonAsPublic

static function CanUserViewLessonAsPublic ($arParams, $allowAccessViaLearningGroups = true)
{
	// Parse options (user_id from $arParams will be automaticaly resolved)
	$options = self::ParseParamsWithUser(
		$arParams,
		array(
			'COURSE_ID' => array(
				'type'          => 'strictly_castable_to_integer',
				'mandatory'     => true
				),
			'LESSON_ID' => array(
				'type'          => 'strictly_castable_to_integer',
				'mandatory'     => true
				)
			)
		);

	// Is it course?
	$linkedLessonId = CCourse::CourseGetLinkedLesson($options['COURSE_ID']);
	if ($linkedLessonId === false)
		return (false);		// Access denied

	$lessonId = $options['LESSON_ID'];
	$breakOnLessonId = $linkedLessonId;	// save resources

	// Is lesson included into given course?
	$isLessonChildOfCourse = false;
	$arOPathes = CLearnLesson::GetListOfParentPathes ($lessonId, $breakOnLessonId);
	foreach ($arOPathes as $oPath)
	{
		$topLessonId = $oPath->GetTop();

		if (($topLessonId !== false) && ($topLessonId == $linkedLessonId))
		{
			$isLessonChildOfCourse = true;
			break;
		}
	}

	if ( ! $isLessonChildOfCourse )
		return (false);		// Access denied

	// Check permissions for course
	$isCourseAccessible = self::CanUserViewLessonContent (array('lesson_id' => $linkedLessonId), $allowAccessViaLearningGroups);

	// Permissions for all lessons/chapters in public are equivalent to course permissions
	return ($isCourseAccessible);
}