friendica-github/src/Model/Config/Config.php

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<?php
2020-02-09 14:45:36 +00:00
/**
* @copyright Copyright (C) 2020, Friendica
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Model\Config;
/**
* The Config model backend, which is using the general DB-model backend for configs
*/
class Config extends DbaConfig
{
/**
* Loads all configuration values and returns the loaded category as an array.
*
* @param string|null $cat The category of the configuration values to load
*
* @return array The config array
*
* @throws \Exception In case DB calls are invalid
*/
public function load(string $cat = null)
{
$return = [];
if (empty($cat)) {
$configs = $this->dba->select('config', ['cat', 'v', 'k']);
} else {
$configs = $this->dba->select('config', ['cat', 'v', 'k'], ['cat' => $cat]);
}
while ($config = $this->dba->fetch($configs)) {
$key = $config['k'];
$value = $this->toConfigValue($config['v']);
// just save it in case it is set
if (isset($value)) {
$return[$config['cat']][$key] = $value;
}
}
$this->dba->close($configs);
return $return;
}
/**
* Get a particular, system-wide config variable out of the DB with the
* given category name ($cat) and a key ($key).
*
* Note: Boolean variables are defined as 0/1 in the database
*
* @param string $cat The category of the configuration value
* @param string $key The configuration key to query
*
* @return array|string|null Stored value or null if it does not exist
*
* @throws \Exception In case DB calls are invalid
*/
public function get(string $cat, string $key)
{
if (!$this->isConnected()) {
return null;
}
$config = $this->dba->selectFirst('config', ['v'], ['cat' => $cat, 'k' => $key]);
if ($this->dba->isResult($config)) {
$value = $this->toConfigValue($config['v']);
// just return it in case it is set
if (isset($value)) {
return $value;
}
}
return null;
}
/**
* Stores a config value ($value) in the category ($cat) under the key ($key).
*
* Note: Please do not store booleans - convert to 0/1 integer values!
*
* @param string $cat The category of the configuration value
* @param string $key The configuration key to set
* @param mixed $value The value to store
*
* @return bool Operation success
*
* @throws \Exception In case DB calls are invalid
*/
public function set(string $cat, string $key, $value)
{
if (!$this->isConnected()) {
return false;
}
// We store our setting values in a string variable.
// So we have to do the conversion here so that the compare below works.
// The exception are array values.
$compare_value = (!is_array($value) ? (string)$value : $value);
$stored_value = $this->get($cat, $key);
if (isset($stored_value) && ($stored_value === $compare_value)) {
return true;
}
$dbvalue = $this->toDbValue($value);
$result = $this->dba->update('config', ['v' => $dbvalue], ['cat' => $cat, 'k' => $key], true);
return $result;
}
/**
* Removes the configured value from the database.
*
* @param string $cat The category of the configuration value
* @param string $key The configuration key to delete
*
* @return bool Operation success
*
* @throws \Exception In case DB calls are invalid
*/
public function delete(string $cat, string $key)
{
if (!$this->isConnected()) {
return false;
}
return $this->dba->delete('config', ['cat' => $cat, 'k' => $key]);
}
}