BaseForm::getPropertyDescription

protected function getPropertyDescription(Property $property): array
{
	$description = [
		'entity' => 'property',
		'name' => static::preparePropertyNameFromProperty($property),
		'propertyId' => $property->getId(),
		'propertyCode' => $property->getCode(),
		'title' => $property->getName(),
		'editable' => true,
		'required' => $property->isRequired(),
		'multiple' => $property->isMultiple(),
		'defaultValue' => $property->getDefaultValue(),
		'settings' => $property->getSettings(),
		'type' => null,
	];

	if ($property->getUserType() === CIBlockPropertySequence::USER_TYPE)
	{
		$userTypeSettings = $property->getSetting('USER_TYPE_SETTINGS');
		$description['editable'] = $userTypeSettings['write'] === 'Y';
	}

	$nonEditableUserTypes = [
		'UserID',
		'FileMan',
	];
	if (in_array($property->getUserType(), $nonEditableUserTypes, true))
	{
		$description['editable'] = false;
	}

	if ($description['propertyCode'] === self::MORE_PHOTO)
	{
		$description['optionFlags'] = 1; // showAlways
	}

	if ($description['multiple'] && !is_array($description['defaultValue']))
	{
		$description['defaultValue'] = $description['defaultValue'] === null ? [] : [$description['defaultValue']];
	}

	// remove it after PropertyTable::TYPE_ELEMENT refactoring
	if ($property->getPropertyType() === PropertyTable::TYPE_ELEMENT)
	{
		Asset::getInstance()->addJs('/bitrix/js/main/utils.js');
	}

	if ($property->getUserType())
	{
		$specificDescription = $this->getUserTypePropertyDescription($property);
	}
	else
	{
		$specificDescription = $this->getGeneralPropertyDescription($property);
	}

	$specificDescription['data']['isPublic'] = $property->isPublic();

	if (!$this->isAllowedEditFields())
	{
		unset($specificDescription['editable']);
		$description['editable'] = false;
	}

	return array_merge($description, $specificDescription);
}