nextcloud/lib/private/appconfig.php

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<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @author Jakob Sack
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* @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/>.
*
*/
/*
*
* The following SQL statement is just a help for developers and will not be
* executed!
*
* CREATE TABLE `appconfig` (
* `appid` VARCHAR( 255 ) NOT NULL ,
* `configkey` VARCHAR( 255 ) NOT NULL ,
* `configvalue` VARCHAR( 255 ) NOT NULL
* )
*
*/
namespace OC;
use \OC\DB\Connection;
/**
* This class provides an easy way for apps to store config values in the
* database.
*/
class AppConfig implements \OCP\IAppConfig {
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/**
* @var \OC\DB\Connection $conn
*/
protected $conn;
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private $cache = array();
private $appsLoaded = array();
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/**
* @param \OC\DB\Connection $conn
*/
public function __construct(Connection $conn) {
$this->conn = $conn;
}
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/**
* @param string $app
* @return string[]
*/
private function getAppCache($app) {
if (!isset($this->cache[$app])) {
$this->cache[$app] = array();
}
return $this->cache[$app];
}
private function getAppValues($app) {
$appCache = $this->getAppCache($app);
if (array_search($app, $this->appsLoaded) === false) {
$query = 'SELECT `configvalue`, `configkey` FROM `*PREFIX*appconfig`'
. ' WHERE `appid` = ?';
$result = $this->conn->executeQuery($query, array($app));
while ($row = $result->fetch()) {
$appCache[$row['configkey']] = $row['configvalue'];
}
$this->appsLoaded[] = $app;
}
$this->cache[$app] = $appCache;
return $appCache;
}
/**
* @brief Get all apps using the config
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* @return array with app ids
*
* This function returns a list of all apps that have at least one
* entry in the appconfig table.
*/
public function getApps() {
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$query = 'SELECT DISTINCT `appid` FROM `*PREFIX*appconfig` ORDER BY `appid`';
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$result = $this->conn->executeQuery($query);
$apps = array();
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while ($appid = $result->fetchColumn()) {
$apps[] = $appid;
}
return $apps;
}
/**
* @brief Get the available keys for an app
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* @param string $app the app we are looking for
* @return array with key names
*
* This function gets all keys of an app. Please note that the values are
* not returned.
*/
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public function getKeys($app) {
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$values = $this->getAppValues($app);
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$keys = array_keys($values);
sort($keys);
return $keys;
}
/**
* @brief Gets the config value
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* @param string $app app
* @param string $key key
* @param string $default = null, default value if the key does not exist
* @return string the value or $default
*
* This function gets a value from the appconfig table. If the key does
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* not exist the default value will be returned
*/
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public function getValue($app, $key, $default = null) {
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$values = $this->getAppValues($app);
if (isset($values[$key])) {
return $values[$key];
} else {
return $default;
}
}
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/**
* @brief check if a key is set in the appconfig
* @param string $app
* @param string $key
* @return bool
*/
public function hasKey($app, $key) {
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$values = $this->getAppValues($app);
return isset($values[$key]);
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}
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/**
* @brief sets a value in the appconfig
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* @param string $app app
* @param string $key key
* @param string $value value
*
* Sets a value. If the key did not exist before it will be created.
*/
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public function setValue($app, $key, $value) {
// Does the key exist? no: insert, yes: update.
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if (!$this->hasKey($app, $key)) {
$data = array(
'appid' => $app,
'configkey' => $key,
'configvalue' => $value,
);
$this->conn->insert('*PREFIX*appconfig', $data);
} else {
$data = array(
'configvalue' => $value,
);
$where = array(
'appid' => $app,
'configkey' => $key,
);
$this->conn->update('*PREFIX*appconfig', $data, $where);
}
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if (!isset($this->cache[$app])) {
$this->cache[$app] = array();
}
$this->cache[$app][$key] = $value;
}
/**
* @brief Deletes a key
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* @param string $app app
* @param string $key key
* @return bool
*
* Deletes a key.
*/
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public function deleteKey($app, $key) {
$where = array(
'appid' => $app,
'configkey' => $key,
);
$this->conn->delete('*PREFIX*appconfig', $where);
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if (isset($this->cache[$app]) and isset($this->cache[$app][$key])) {
unset($this->cache[$app][$key]);
}
}
/**
* @brief Remove app from appconfig
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* @param string $app app
* @return bool
*
* Removes all keys in appconfig belonging to the app.
*/
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public function deleteApp($app) {
$where = array(
'appid' => $app,
);
$this->conn->delete('*PREFIX*appconfig', $where);
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unset($this->cache[$app]);
}
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/**
* get multiply values, either the app or key can be used as wildcard by setting it to false
*
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* @param app
* @param key
* @return array
*/
public function getValues($app, $key) {
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if (($app !== false) == ($key !== false)) {
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return false;
}
$fields = '`configvalue`';
$where = 'WHERE';
$params = array();
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if ($app !== false) {
$fields .= ', `configkey`';
$where .= ' `appid` = ?';
$params[] = $app;
$key = 'configkey';
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} else {
$fields .= ', `appid`';
$where .= ' `configkey` = ?';
$params[] = $key;
$key = 'appid';
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}
$query = 'SELECT ' . $fields . ' FROM `*PREFIX*appconfig` ' . $where;
$result = $this->conn->executeQuery($query, $params);
$values = array();
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while ($row = $result->fetch((\PDO::FETCH_ASSOC))) {
$values[$row[$key]] = $row['configvalue'];
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}
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return $values;
}
}