PhabricatorConfigLocalSource.php
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	<?php

	final class PhabricatorConfigLocalSource extends PhabricatorConfigProxySource {

	public function __construct() {
	$config = $this->loadConfig();
	$this->setSource(new PhabricatorConfigDictionarySource($config));
	}

	public function setKeys(array $keys) {
	$result = parent::setKeys($keys);
	$this->saveConfig();
	return $result;
	}

	public function deleteKeys(array $keys) {
	$result = parent::deleteKeys($keys);
	$this->saveConfig();
	return parent::deleteKeys($keys);
	}

	private function loadConfig() {
	$path = $this->getConfigPath();

	if (!Filesystem::pathExists($path)) {
	return array();
	}

	try {
	$data = Filesystem::readFile($path);
	} catch (FilesystemException $ex) {
	throw new PhutilProxyException(
	pht(
	'Configuration file "%s" exists, but could not be read.',
	$path),
	$ex);
	}

	try {
	$result = phutil_json_decode($data);
	} catch (PhutilJSONParserException $ex) {
	throw new PhutilProxyException(
	pht(
	'Configuration file "%s" exists and is readable, but the content '.
	'is not valid JSON. You may have edited this file manually and '.
	'introduced a syntax error by mistake. Correct the file syntax '.
	'to continue.',
	$path),
	$ex);
	}

	return $result;
	}

	private function saveConfig() {
	$config = $this->getSource()->getAllKeys();
	$json = new PhutilJSON();
	$data = $json->encodeFormatted($config);
	Filesystem::writeFile($this->getConfigPath(), $data);
	}

	private function getConfigPath() {
	$root = dirname(phutil_get_library_root('phabricator'));
	$path = $root.'/conf/local/local.json';
	return $path;
	}

	}