nextcloud/lib/private/config.php

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<?php
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/**
* ownCloud
*
* @author Frank Karlitschek
* @author Jakob Sack
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* @copyright 2012 Frank Karlitschek frank@owncloud.org
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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
*
* An example of config.php
*
* <?php
* $CONFIG = array(
* "database" => "mysql",
* "firstrun" => false,
* "pi" => 3.14
* );
* ?>
*
*/
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namespace OC;
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/**
* This class is responsible for reading and writing config.php, the very basic
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* configuration file of ownCloud.
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*/
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class Config {
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// associative array key => value
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protected $cache = array();
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protected $configDir;
protected $configFilename;
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protected $debugMode;
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/**
* @param string $configDir path to the config dir, needs to end with '/'
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*/
public function __construct($configDir) {
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$this->configDir = $configDir;
$this->configFilename = $this->configDir.'config.php';
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$this->readData();
$this->setDebugMode(defined('DEBUG') && DEBUG);
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}
public function setDebugMode($enable) {
$this->debugMode = $enable;
}
/**
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* @brief Lists all available config keys
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* @return array with key names
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*
* This function returns all keys saved in config.php. Please note that it
* does not return the values.
*/
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public function getKeys() {
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return array_keys($this->cache);
}
/**
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* @brief Gets a value from config.php
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* @param string $key key
* @param string|null $default = null default value
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* @return string the value or $default
*
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* This function gets the value from config.php. If it does not exist,
* $default will be returned.
*/
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public function getValue($key, $default = null) {
if (isset($this->cache[$key])) {
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return $this->cache[$key];
}
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return $default;
}
/**
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* @brief Sets a value
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* @param string $key key
* @param string $value value
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*
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* This function sets the value and writes the config.php.
*
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*/
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public function setValue($key, $value) {
// Add change
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$this->cache[$key] = $value;
// Write changes
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$this->writeData();
}
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/**
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* @brief Removes a key from the config
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* @param string $key key
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*
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* This function removes a key from the config.php.
*
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*/
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public function deleteKey($key) {
if (isset($this->cache[$key])) {
// Delete key from cache
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unset($this->cache[$key]);
// Write changes
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$this->writeData();
}
}
/**
* @brief Loads the config file
*
* Reads the config file and saves it to the cache
*/
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private function readData() {
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// Default config
$configFiles = array($this->configFilename);
// Add all files in the config dir ending with config.php
$extra = glob($this->configDir.'*.config.php');
if (is_array($extra)) {
natsort($extra);
$configFiles = array_merge($configFiles, $extra);
}
// Include file and merge config
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foreach ($configFiles as $file) {
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if (!file_exists($file)) {
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continue;
}
unset($CONFIG);
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// ignore errors on include, this can happen when doing a fresh install
@include $file;
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if (isset($CONFIG) && is_array($CONFIG)) {
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$this->cache = array_merge($this->cache, $CONFIG);
}
}
}
/**
* @brief Writes the config file
*
* Saves the config to the config file.
*
*/
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private function writeData() {
// Create a php file ...
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$content = "<?php\n";
if ($this->debugMode) {
$content .= "define('DEBUG',true);\n";
}
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$content .= '$CONFIG = ';
$content .= var_export($this->cache, true);
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$content .= ";\n";
// Write the file
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$result = @file_put_contents($this->configFilename, $content);
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if (!$result) {
$defaults = new \OC_Defaults;
$url = \OC_Helper::linkToDocs('admin-dir-permissions');
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throw new HintException(
"Can't write into config directory!",
'This can usually be fixed by '
.'<a href="' . $url . '" target="_blank">giving the webserver write access to the config directory</a>.');
}
// Prevent others not to read the config
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@chmod($this->configFilename, 0640);
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\OC_Util::clearOpcodeCache();
}
}