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<?php
/**
* Piwik - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Settings\Plugin;
use Piwik\Config;
use Piwik\Container\StaticContainer;
use Piwik\Piwik;
use Piwik\Settings\Setting;
/**
* Describes a system wide setting. Only the Super User can change this type of setting by default and
* the value of this setting will affect all users.
*
* See {@link \Piwik\Settings\Setting}.
*
* @api
*/
class SystemSetting extends Setting
{
/**
* Constructor.
*
* @param string $name The setting's persisted name.
* @param mixed $defaultValue Default value for this setting if no value was specified.
* @param string $type Eg an array, int, ... see TYPE_* constants
* @param string $pluginName The name of the plugin the system setting belongs to.
*/
public function __construct($name, $defaultValue, $type, $pluginName)
{
parent::__construct($name, $defaultValue, $type, $pluginName);
$factory = StaticContainer::get('Piwik\Settings\Storage\Factory');
$this->storage = $factory->getPluginStorage($this->pluginName, $userLogin = '');
}
/**
* Returns `true` if this setting is writable for the current user, `false` if otherwise. In case it returns
* writable for the current user it will be visible in the Plugin settings UI.
*
* @return bool
*/
public function isWritableByCurrentUser()
{
if ($this->hasConfigValue()) {
return false;
}
if (isset($this->hasWritePermission)) {
return $this->hasWritePermission;
}
// performance improvement, do not detect this in __construct otherwise likely rather "big" query to DB.
$this->hasWritePermission = Piwik::hasUserSuperUserAccess();
return $this->hasWritePermission;
}
/**
* @inheritdoc
*/
public function getValue()
{
$defaultValue = parent::getValue(); // we access value first to make sure permissions are checked
$configValue = $this->getValueFromConfig();
if (isset($configValue)) {
$defaultValue = $configValue;
settype($defaultValue, $this->type);
}
return $defaultValue;
}
private function hasConfigValue()
{
$value = $this->getValueFromConfig();
return isset($value);
}
private function getValueFromConfig()
{
$config = Config::getInstance()->{$this->pluginName};
if (!empty($config) && array_key_exists($this->name, $config)) {
return $config[$this->name];
}
}
}
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