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<?php
/**
* @version $Id$
* @package Koowa_Config
* @copyright Copyright (C) 2007 - 2012 Johan Janssens. All rights reserved.
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
* @link http://www.nooku.org
*/
/**
* Config Class
*
* KConfig provides a property based interface to an array
*
* @author Johan Janssens <johan@nooku.org>
* @package Koowa_Config
*/
class KConfig implements KConfigInterface
{
/**
* The data container
*
* @var array
*/
protected $_data;
/**
* Constructor.
*
* @param array|KConfig An associative array of configuration settings or a KConfig instance.
*/
public function __construct( $config = array() )
{
if ($config instanceof KConfig) {
$data = $config->toArray();
} else {
$data = $config;
}
$this->_data = array();
if (is_array($data))
{
foreach ($data as $key => $value) {
$this->__set($key, $value);
}
}
}
/**
* Retrieve a configuration item and return $default if there is no element set.
*
* @param string
* @param mixed
* @return mixed
*/
public function get($name, $default = null)
{
$result = $default;
if(isset($this->_data[$name])) {
$result = $this->_data[$name];
}
return $result;
}
/**
* Return the data
*
* If the data being passed is an instance of KConfig the data will be transformed
* to an associative array.
*
* @return array|scalar
*/
public static function unbox($data)
{
return ($data instanceof KConfig) ? $data->toArray() : $data;
}
/**
* Append values
*
* This funciton only adds keys that don't exist and it filters out any duplicate values
*
* @param mixed A value of an or array of values to be appended
* @return KConfig
*/
public function append($config)
{
$config = KConfig::unbox($config);
if(is_array($config))
{
if(!is_numeric(key($config)))
{
foreach($config as $key => $value)
{
if(array_key_exists($key, $this->_data))
{
if(!empty($value) && ($this->_data[$key] instanceof KConfig)) {
$this->_data[$key] = $this->_data[$key]->append($value);
}
}
else $this->__set($key, $value);
}
}
else
{
foreach($config as $value)
{
if (!in_array($value, $this->_data, true)) {
$this->_data[] = $value;
}
}
}
}
return $this;
}
/**
* Retrieve a configuration element
*
* @param string
* @return mixed
*/
public function __get($name)
{
return $this->get($name);
}
/**
* Set a configuration element
*
* @param string
* @param mixed
* @return void
*/
public function __set($name, $value)
{
if (is_array($value)) {
$this->_data[$name] = new self($value);
} else {
$this->_data[$name] = $value;
}
}
/**
* Test existence of a configuration element
*
* @param string
* @return boolean
*/
public function __isset($name)
{
return isset($this->_data[$name]);
}
/**
* Unset a configuration element
*
* @param string
* @return void
*/
public function __unset($name)
{
unset($this->_data[$name]);
}
/**
* Get a new iterator
*
* @return ArrayIterator
*/
public function getIterator()
{
return new ArrayIterator($this->_data);
}
/**
* Returns the number of elements in the collection.
*
* Required by the Countable interface
*
* @return int
*/
public function count()
{
return count($this->_data);
}
/**
* Check if the offset exists
*
* Required by interface ArrayAccess
*
* @param int The offset
* @return bool
*/
public function offsetExists($offset)
{
return isset($this->_data[$offset]);
}
/**
* Get an item from the array by offset
*
* Required by interface ArrayAccess
*
* @param int The offset
* @return mixed The item from the array
*/
public function offsetGet($offset)
{
$result = null;
if(isset($this->_data[$offset]))
{
$result = $this->_data[$offset];
if($result instanceof KConfig) {
$result = $result->toArray();
}
}
return $result;
}
/**
* Set an item in the array
*
* Required by interface ArrayAccess
*
* @param int The offset of the item
* @param mixed The item's value
* @return object KConfig
*/
public function offsetSet($offset, $value)
{
$this->_data[$offset] = $value;
return $this;
}
/**
* Unset an item in the array
*
* All numerical array keys will be modified to start counting from zero while
* literal keys won't be touched.
*
* Required by interface ArrayAccess
*
* @param int The offset of the item
* @return object KConfig
*/
public function offsetUnset($offset)
{
unset($this->_data[$offset]);
return $this;
}
/**
* Return an associative array of the config data.
*
* @return array
*/
public function toArray()
{
$array = array();
$data = $this->_data;
foreach ($data as $key => $value)
{
if ($value instanceof KConfig) {
$array[$key] = $value->toArray();
} else {
$array[$key] = $value;
}
}
return $array;
}
/**
* Returns a string with the encapsulated data in JSON format
*
* @return string Returns the data encoded to JSON
*/
public function toJson()
{
return json_encode($this->toArray());
}
/**
* Deep clone of this instance to ensure that nested KConfigs
* are also cloned.
*
* @return void
*/
public function __clone()
{
$array = array();
foreach ($this->_data as $key => $value)
{
if ($value instanceof KConfig || $value instanceof stdClass) {
$array[$key] = clone $value;
} else {
$array[$key] = $value;
}
}
$this->_data = $array;
}
/**
* Returns a string with the encapsulated data in JSON format
*
* @return string returns the data encoded to JSON
*/
public function __toString()
{
return $this->toJson();
}
}
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