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<?php
/**
* @version $Id$
* @package Koowa_Model
* @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
*/
/**
* State Config Class
*
* @author Johan Janssens <johan@nooku.org>
* @category Koowa
* @package Koowa_Config
*/
class KConfigState extends KConfig
{
/**
* 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]->value;
}
return $result;
}
/**
* Set state value
*
* @param string The user-specified state name.
* @param mixed The user-specified state value.
* @return void
*/
public function __set($name, $value)
{
if(isset($this->_data[$name])) {
$this->_data[$name]->value = $value;
}
}
/**
* Unset a state value
*
* @param string The column key.
* @return void
*/
public function __unset($name)
{
if(isset($this->_data[$name])) {
$this->_data[$name]->value = $this->_data[$name]->default;
}
}
/**
* Insert a new state
*
* @param string The name of the state
* @param mixed Filter(s), can be a KFilterInterface object, a filter name or an array of filter names
* @param mixed The default value of the state
* @param boolean TRUE if the state uniquely indetifies an enitity, FALSE otherwise. Default FALSE.
* @param array Array of required states to determine if the state is unique. Only applicable if the state is unqiue.
* @return KConfigState
*/
public function insert($name, $filter, $default = null, $unique = false, $required = array())
{
$state = new stdClass();
$state->name = $name;
$state->filter = $filter;
$state->value = $default;
$state->unique = $unique;
$state->required = $required;
$state->default = $default;
$this->_data[$name] = $state;
return $this;
}
/**
* Remove an existing state
*
* @param string The name of the state
* @return KConfigState
*/
public function remove( $name )
{
unset($this->_data[$name]);
return $this;
}
/**
* Reset all state data and revert to the default state
*
* @param boolean If TRUE use defaults when resetting. Default is TRUE
* @return KConfigState
*/
public function reset($default = true)
{
foreach($this->_data as $state) {
$state->value = $default ? $state->default : null;
}
return $this;
}
/**
* Set the state data
*
* This function will only filter values if we have a value. If the value
* is an empty string it will be filtered to NULL.
*
* @param array|object An associative array of state values by name
* @return KConfigState
*/
public function setData(array $data)
{
// Filter data
foreach($data as $key => $value)
{
if(isset($this->_data[$key]))
{
$filter = $this->_data[$key]->filter;
//Only filter if we have a value
if($value !== null)
{
if($value !== '')
{
if(!($filter instanceof KFilterInterface)) {
$filter = KService::get('koowa:filter.factory')->instantiate($filter);
}
$value = $filter->sanitize($value);
}
else $value = null;
$this->_data[$key]->value = $value;
}
}
}
return $this;
}
/**
* Get the state data
*
* This function only returns states that have been been set.
*
* @param boolean If TRUE only retrieve unique state values, default FALSE
* @return array An associative array of state values by name
*/
public function getData($unique = false)
{
$data = array();
foreach ($this->_data as $name => $state)
{
if(isset($state->value))
{
//Only return unique data
if($unique)
{
//Unique values cannot be null or an empty string
if($state->unique && $this->_validate($state))
{
$result = true;
//Check related states to see if they are set
foreach($state->required as $required)
{
if(!$this->_validate($this->_data[$required]))
{
$result = false;
break;
}
}
//Prepare the data to be returned. Include states
if($result)
{
$data[$name] = $state->value;
foreach($state->required as $required) {
$data[$required] = $this->_data[$required]->value;
}
}
}
}
else $data[$name] = $state->value;
}
}
return $data;
}
/**
* Check if the state information is unique
*
* @return boolean TRUE if the state is unique, otherwise FALSE.
*/
public function isUnique()
{
$unique = false;
//Get the unique states
$states = $this->getData(true);
if(!empty($states))
{
$unique = true;
//If a state contains multiple values the state is not unique
foreach($states as $state)
{
if(is_array($state) && count($state) > 1)
{
$unique = false;
break;
}
}
}
return $unique;
}
/**
* Check if the state information is empty
*
* @param array An array of states names to exclude.
* @return boolean TRUE if the state is empty, otherwise FALSE.
*/
public function isEmpty(array $exclude = array())
{
$states = $this->getData();
foreach($exclude as $state) {
unset($states[$state]);
}
return (bool) (count($states) == 0);
}
/**
* Return an associative array of the states.
*
* @param bool If TRUE return only as associative array of the state values. Default is TRUE.
* @return array
*/
public function toArray($values = true)
{
if($values)
{
$result = array();
foreach($this->_data as $state) {
$result[$state->name] = $state->value;
}
}
else $result = $this->_data;
return $result;
}
/**
* Validate a unique state.
*
* @param object The state object.
* @return boolean True if unique state is valid, false otherwise.
*/
protected function _validate($state)
{
// Unique values can't be null or empty string.
if(empty($state->value) && !is_numeric($state->value)) {
return false;
}
if(is_array($state->value))
{
// The first element of the array can't be null or empty string.
$first = array_slice($state->value, 0, 1);
if(empty($first) && !is_numeric($first)) {
return false;
}
}
return true;
}
}
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