testing

PhabricatorOptionGroupSetting.php
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			<?php

			abstract class PhabricatorOptionGroupSetting
			extends PhabricatorSetting {

			abstract protected function getSelectOptionGroups();

			final protected function getSelectOptionMap() {
			$groups = $this->getSelectOptionGroups();

			$map = array();
			foreach ($groups as $group) {
			$map += $group['options'];
			}

			return $map;
			}

			final protected function newCustomEditField($object) {
			$setting_key = $this->getSettingKey();
			$default_value = $object->getDefaultValue($setting_key);

			$options = $this->getSelectOptionGroups();

			$map = $this->getSelectOptionMap();
			if (isset($map[$default_value])) {
			$default_label = pht('Default (%s)', $map[$default_value]);
			} else {
			$default_label = pht('Default (Unknown, "%s")', $default_value);
			}

			$head_key = head_key($options);
			$options[$head_key]['options'] = array(
			'' => $default_label,
			) + $options[$head_key]['options'];

			$flat_options = array();
			foreach ($options as $group) {
			$flat_options[$group['label']] = $group['options'];
			}

			return $this->newEditField($object, new PhabricatorSelectEditField())
			->setOptions($flat_options);
			}

			final public function validateTransactionValue($value) {
			if (!strlen($value)) {
			return;
			}

			$map = $this->getSelectOptionMap();

			if (!isset($map[$value])) {
			throw new Exception(
			pht(
			'Value "%s" is not valid for setting "%s": valid values are %s.',
			$value,
			$this->getSettingName(),
			implode(', ', array_keys($map))));
			}

			return;
			}

			public function getTransactionNewValue($value) {
			if (!strlen($value)) {
			return null;
			}

			return (string)$value;
			}

			}