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|
<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @author Jakob Sack
* @copyright 2012 Frank Karlitschek frank@owncloud.org
*
* 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
* );
* ?>
*
*/
/**
* This class is responsible for reading and writing config.php, the very basic
* configuration file of owncloud.
*/
class OC_Config{
// associative array key => value
private static $cache = array();
// Is the cache filled?
private static $init = false;
/**
* @brief Lists all available config keys
* @returns array with key names
*
* This function returns all keys saved in config.php. Please note that it
* does not return the values.
*/
public static function getKeys() {
self::readData();
return array_keys( self::$cache );
}
/**
* @brief Gets a value from config.php
* @param $key key
* @param $default = null default value
* @returns the value or $default
*
* This function gets the value from config.php. If it does not exist,
* $default will be returned.
*/
public static function getValue( $key, $default = null ) {
self::readData();
if( array_key_exists( $key, self::$cache )) {
return self::$cache[$key];
}
return $default;
}
/**
* @brief Sets a value
* @param $key key
* @param $value value
* @returns true/false
*
* This function sets the value and writes the config.php. If the file can
* not be written, false will be returned.
*/
public static function setValue( $key, $value ) {
self::readData();
// Add change
self::$cache[$key] = $value;
// Write changes
self::writeData();
return true;
}
/**
* @brief Removes a key from the config
* @param $key key
* @returns true/false
*
* This function removes a key from the config.php. If owncloud has no
* write access to config.php, the function will return false.
*/
public static function deleteKey( $key ) {
self::readData();
if( array_key_exists( $key, self::$cache )) {
// Delete key from cache
unset( self::$cache[$key] );
// Write changes
self::writeData();
}
return true;
}
/**
* @brief Loads the config file
* @returns true/false
*
* Reads the config file and saves it to the cache
*/
private static function readData() {
if( self::$init ) {
return true;
}
if( !file_exists( OC::$SERVERROOT."/config/config.php" )) {
return false;
}
// Include the file, save the data from $CONFIG
include OC::$SERVERROOT."/config/config.php";
if( isset( $CONFIG ) && is_array( $CONFIG )) {
self::$cache = $CONFIG;
}
// We cached everything
self::$init = true;
return true;
}
/**
* @brief Writes the config file
* @returns true/false
*
* Saves the config to the config file.
*
*/
public static function writeData() {
// Create a php file ...
$content = "<?php\n\$CONFIG = ";
$content .= var_export(self::$cache, true);
$content .= ";\n";
$filename = OC::$SERVERROOT."/config/config.php";
// Write the file
$result=@file_put_contents( $filename, $content );
if(!$result) {
$tmpl = new OC_Template( '', 'error', 'guest' );
$tmpl->assign('errors', array(1=>array(
'error'=>"Can't write into config directory 'config'",
'hint'=>"You can usually fix this by giving the webserver user write access to the config directory in owncloud")));
$tmpl->printPage();
exit;
}
// Prevent others not to read the config
@chmod($filename, 0640);
return true;
}
}
|
