EntityPreset::settingsPrepareFieldsBeforeSave

protected function settingsPrepareFieldsBeforeSave($settings)
{
	$result = $settings;

	if (is_array($settings['FIELDS']) && !empty($settings['FIELDS']))
	{
		$fields = [];
		$fieldIdMap = [];
		$fieldNameMap = [];
		$lastFieldId = 0;
		$fieldsModified = false;
		$lastFieldIdModified = false;
		$settingsLastFieldId = isset($settings['LAST_FIELD_ID']) ? (int)$settings['LAST_FIELD_ID'] : 0;
		foreach ($settings['FIELDS'] as $fieldInfo)
		{
			if (isset($fieldInfo['ID'])
				&& $fieldInfo['ID'] > 0
				&& isset($fieldInfo['FIELD_NAME'])
				&& is_string($fieldInfo['FIELD_NAME'])
				&& $fieldInfo['FIELD_NAME'] !== '')
			{
				$fieldId = (int)$fieldInfo['ID'];
				$fieldName = $fieldInfo['FIELD_NAME'];
				if (!isset($fieldNameMap[$fieldName]))
				{
					if (isset($fieldIdMap[$fieldId]))
					{
						$fieldId = $lastFieldId + 1;
						$fieldInfo['ID'] = $fieldId;
						$fieldsModified = true;
					}
					$fieldIdMap[$fieldId] = true;
					$fieldNameMap[$fieldName] = true;
					$fields[] = $fieldInfo;
					if ($fieldId > $lastFieldId)
					{
						$lastFieldId = $fieldId;
					}
				}
				else
				{
					$fieldsModified = true;
				}
			}
			else
			{
				$fieldsModified = true;
			}
		}
		if ($lastFieldId === 0 || $lastFieldId > $settingsLastFieldId)
		{
			$lastFieldIdModified = true;
		}
		if ($fieldsModified)
		{
			$result['FIELDS'] = $fields;
		}
		if ($lastFieldIdModified)
		{
			$result['LAST_FIELD_ID'] = $lastFieldId;
		}
	}

	return $result;
}