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Object.php
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Wed, Nov 20, 10:11

Object.php
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<?php
class Stripe_Object implements ArrayAccess
{
/**
* @var Stripe_Util_Set Attributes that should not be sent to the API because
* they're not updatable (e.g. API key, ID).
*/
public static $permanentAttributes;
/**
* @var Stripe_Util_Set Attributes that are nested but still updatable from
* the parent class's URL (e.g. metadata).
*/
public static $nestedUpdatableAttributes;
public static function init()
{
self::$permanentAttributes = new Stripe_Util_Set(array('_apiKey', 'id'));
self::$nestedUpdatableAttributes = new Stripe_Util_Set(array('metadata'));
}
protected $_apiKey;
protected $_values;
protected $_unsavedValues;
protected $_transientValues;
protected $_retrieveOptions;
public function __construct($id=null, $apiKey=null)
{
$this->_apiKey = $apiKey;
$this->_values = array();
$this->_unsavedValues = new Stripe_Util_Set();
$this->_transientValues = new Stripe_Util_Set();
$this->_retrieveOptions = array();
if (is_array($id)) {
foreach ($id as $key => $value) {
if ($key != 'id') {
$this->_retrieveOptions[$key] = $value;
}
}
$id = $id['id'];
}
if ($id !== null) {
$this->id = $id;
}
}
// Standard accessor magic methods
public function __set($k, $v)
{
if ($v === "") {
throw new InvalidArgumentException(
'You cannot set \''.$k.'\'to an empty string. '
.'We interpret empty strings as NULL in requests. '
.'You may set obj->'.$k.' = NULL to delete the property'
);
}
if (self::$nestedUpdatableAttributes->includes($k)
&& isset($this->$k) && is_array($v)) {
$this->$k->replaceWith($v);
} else {
// TODO: may want to clear from $_transientValues (Won't be user-visible).
$this->_values[$k] = $v;
}
if (!self::$permanentAttributes->includes($k))
$this->_unsavedValues->add($k);
}
public function __isset($k)
{
return isset($this->_values[$k]);
}
public function __unset($k)
{
unset($this->_values[$k]);
$this->_transientValues->add($k);
$this->_unsavedValues->discard($k);
}
public function __get($k)
{
if (array_key_exists($k, $this->_values)) {
return $this->_values[$k];
} else if ($this->_transientValues->includes($k)) {
$class = get_class($this);
$attrs = join(', ', array_keys($this->_values));
$message = "Stripe Notice: Undefined property of $class instance: $k. "
. "HINT: The $k attribute was set in the past, however. "
. "It was then wiped when refreshing the object "
. "with the result returned by Stripe's API, "
. "probably as a result of a save(). The attributes currently "
. "available on this object are: $attrs";
error_log($message);
return null;
} else {
$class = get_class($this);
error_log("Stripe Notice: Undefined property of $class instance: $k");
return null;
}
}
// ArrayAccess methods
public function offsetSet($k, $v)
{
$this->$k = $v;
}
public function offsetExists($k)
{
return array_key_exists($k, $this->_values);
}
public function offsetUnset($k)
{
unset($this->$k);
}
public function offsetGet($k)
{
return array_key_exists($k, $this->_values) ? $this->_values[$k] : null;
}
public function keys()
{
return array_keys($this->_values);
}
/**
* This unfortunately needs to be public to be used in Util.php
*
* @param string $class
* @param array $values
* @param string|null $apiKey
*
* @return Stripe_Object The object constructed from the given values.
*/
public static function scopedConstructFrom($class, $values, $apiKey=null)
{
$obj = new $class(isset($values['id']) ? $values['id'] : null, $apiKey);
$obj->refreshFrom($values, $apiKey);
return $obj;
}
/**
* @param array $values
* @param string|null $apiKey
*
* @return Stripe_Object The object of the same class as $this constructed
* from the given values.
*/
public static function constructFrom($values, $apiKey=null)
{
return self::scopedConstructFrom(__CLASS__, $values, $apiKey);
}
/**
* Refreshes this object using the provided values.
*
* @param array $values
* @param string $apiKey
* @param boolean $partial Defaults to false.
*/
public function refreshFrom($values, $apiKey, $partial=false)
{
$this->_apiKey = $apiKey;
// Wipe old state before setting new. This is useful for e.g. updating a
// customer, where there is no persistent card parameter. Mark those values
// which don't persist as transient
if ($partial) {
$removed = new Stripe_Util_Set();
} else {
$removed = array_diff(array_keys($this->_values), array_keys($values));
}
foreach ($removed as $k) {
if (self::$permanentAttributes->includes($k))
continue;
unset($this->$k);
}
foreach ($values as $k => $v) {
if (self::$permanentAttributes->includes($k) && isset($this[$k]))
continue;
if (self::$nestedUpdatableAttributes->includes($k) && is_array($v)) {
$this->_values[$k] = Stripe_Object::scopedConstructFrom(
'Stripe_AttachedObject', $v, $apiKey
);
} else {
$this->_values[$k] = Stripe_Util::convertToStripeObject($v, $apiKey);
}
$this->_transientValues->discard($k);
$this->_unsavedValues->discard($k);
}
}
/**
* @return array A recursive mapping of attributes to values for this object,
* including the proper value for deleted attributes.
*/
public function serializeParameters()
{
$params = array();
if ($this->_unsavedValues) {
foreach ($this->_unsavedValues->toArray() as $k) {
$v = $this->$k;
if ($v === NULL) {
$v = '';
}
$params[$k] = $v;
}
}
// Get nested updates.
foreach (self::$nestedUpdatableAttributes->toArray() as $property) {
if (isset($this->$property)
&& $this->$property instanceOf Stripe_Object) {
$params[$property] = $this->$property->serializeParameters();
}
}
return $params;
}
// Pretend to have late static bindings, even in PHP 5.2
protected function _lsb($method)
{
$class = get_class($this);
$args = array_slice(func_get_args(), 1);
return call_user_func_array(array($class, $method), $args);
}
protected static function _scopedLsb($class, $method)
{
$args = array_slice(func_get_args(), 2);
return call_user_func_array(array($class, $method), $args);
}
public function __toJSON()
{
if (defined('JSON_PRETTY_PRINT')) {
return json_encode($this->__toArray(true), JSON_PRETTY_PRINT);
} else {
return json_encode($this->__toArray(true));
}
}
public function __toString()
{
return $this->__toJSON();
}
public function __toArray($recursive=false)
{
if ($recursive) {
return Stripe_Util::convertStripeObjectToArray($this->_values);
} else {
return $this->_values;
}
}
}
Stripe_Object::init();

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