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<?php
/**
*
* @package phpBB3
* @copyright (c) 2010 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/
namespace phpbb\config;
/**
* Configuration container class
* @package phpBB3
*/
class config implements \ArrayAccess, \IteratorAggregate, \Countable
{
/**
* The configuration data
* @var array(string => string)
*/
protected $config;
/**
* Creates a configuration container with a default set of values
*
* @param array(string => string) $config The configuration data.
*/
public function __construct(array $config)
{
$this->config = $config;
}
/**
* Retrieves an ArrayIterator over the configuration values.
*
* @return ArrayIterator An iterator over all config data
*/
public function getIterator()
{
return new \ArrayIterator($this->config);
}
/**
* Checks if the specified config value exists.
*
* @param string $key The configuration option's name.
* @return bool Whether the configuration option exists.
*/
public function offsetExists($key)
{
return isset($this->config[$key]);
}
/**
* Retrieves a configuration value.
*
* @param string $key The configuration option's name.
* @return string The configuration value
*/
public function offsetGet($key)
{
return (isset($this->config[$key])) ? $this->config[$key] : '';
}
/**
* Temporarily overwrites the value of a configuration variable.
*
* The configuration change will not persist. It will be lost
* after the request.
*
* @param string $key The configuration option's name.
* @param string $value The temporary value.
*/
public function offsetSet($key, $value)
{
$this->config[$key] = $value;
}
/**
* Called when deleting a configuration value directly, triggers an error.
*
* @param string $key The configuration option's name.
*/
public function offsetUnset($key)
{
trigger_error('Config values have to be deleted explicitly with the \phpbb\config\config::delete($key) method.', E_USER_ERROR);
}
/**
* Retrieves the number of configuration options currently set.
*
* @return int Number of config options
*/
public function count()
{
return count($this->config);
}
/**
* Removes a configuration option
*
* @param String $key The configuration option's name
* @param bool $use_cache Whether this variable should be cached or if it
* changes too frequently to be efficiently cached
* @return null
*/
public function delete($key, $use_cache = true)
{
unset($this->config[$key]);
}
/**
* Sets a configuration option's value
*
* @param string $key The configuration option's name
* @param string $value New configuration value
* @param bool $use_cache Whether this variable should be cached or if it
* changes too frequently to be efficiently cached.
*/
public function set($key, $value, $use_cache = true)
{
$this->config[$key] = $value;
}
/**
* Sets a configuration option's value only if the old_value matches the
* current configuration value or the configuration value does not exist yet.
*
* @param string $key The configuration option's name
* @param string $old_value Current configuration value
* @param string $new_value New configuration value
* @param bool $use_cache Whether this variable should be cached or if it
* changes too frequently to be efficiently cached.
* @return bool True if the value was changed, false otherwise.
*/
public function set_atomic($key, $old_value, $new_value, $use_cache = true)
{
if (!isset($this->config[$key]) || $this->config[$key] == $old_value)
{
$this->config[$key] = $new_value;
return true;
}
return false;
}
/**
* Increments an integer configuration value.
*
* @param string $key The configuration option's name
* @param int $increment Amount to increment by
* @param bool $use_cache Whether this variable should be cached or if it
* changes too frequently to be efficiently cached.
*/
function increment($key, $increment, $use_cache = true)
{
if (!isset($this->config[$key]))
{
$this->config[$key] = 0;
}
$this->config[$key] += $increment;
}
}
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