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<?php
namespace Stripe\Util;
use Stripe\StripeObject;
abstract class Util
{
private static $isMbstringAvailable = null;
private static $isHashEqualsAvailable = null;
/**
* Whether the provided array (or other) is a list rather than a dictionary.
* A list is defined as an array for which all the keys are consecutive
* integers starting at 0. Empty arrays are considered to be lists.
*
* @param array|mixed $array
* @return boolean true if the given object is a list.
*/
public static function isList($array)
{
if (!is_array($array)) {
return false;
}
if ($array === []) {
return true;
}
if (array_keys($array) !== range(0, count($array) - 1)) {
return false;
}
return true;
}
/**
* Recursively converts the PHP Stripe object to an array.
*
* @param array $values The PHP Stripe object to convert.
* @return array
*/
public static function convertStripeObjectToArray($values)
{
$results = [];
foreach ($values as $k => $v) {
// FIXME: this is an encapsulation violation
if ($k[0] == '_') {
continue;
}
if ($v instanceof StripeObject) {
$results[$k] = $v->__toArray(true);
} elseif (is_array($v)) {
$results[$k] = self::convertStripeObjectToArray($v);
} else {
$results[$k] = $v;
}
}
return $results;
}
/**
* Converts a response from the Stripe API to the corresponding PHP object.
*
* @param array $resp The response from the Stripe API.
* @param array $opts
* @return StripeObject|array
*/
public static function convertToStripeObject($resp, $opts)
{
$types = [
// data structures
\Stripe\Collection::OBJECT_NAME => 'Stripe\\Collection',
// business objects
\Stripe\Account::OBJECT_NAME => 'Stripe\\Account',
\Stripe\AccountLink::OBJECT_NAME => 'Stripe\\AccountLink',
\Stripe\AlipayAccount::OBJECT_NAME => 'Stripe\\AlipayAccount',
\Stripe\ApplePayDomain::OBJECT_NAME => 'Stripe\\ApplePayDomain',
\Stripe\ApplicationFee::OBJECT_NAME => 'Stripe\\ApplicationFee',
\Stripe\Balance::OBJECT_NAME => 'Stripe\\Balance',
\Stripe\BalanceTransaction::OBJECT_NAME => 'Stripe\\BalanceTransaction',
\Stripe\BankAccount::OBJECT_NAME => 'Stripe\\BankAccount',
\Stripe\BitcoinReceiver::OBJECT_NAME => 'Stripe\\BitcoinReceiver',
\Stripe\BitcoinTransaction::OBJECT_NAME => 'Stripe\\BitcoinTransaction',
\Stripe\Capability::OBJECT_NAME => 'Stripe\\Capability',
\Stripe\Card::OBJECT_NAME => 'Stripe\\Card',
\Stripe\Charge::OBJECT_NAME => 'Stripe\\Charge',
\Stripe\Checkout\Session::OBJECT_NAME => 'Stripe\\Checkout\\Session',
\Stripe\CountrySpec::OBJECT_NAME => 'Stripe\\CountrySpec',
\Stripe\Coupon::OBJECT_NAME => 'Stripe\\Coupon',
\Stripe\CreditNote::OBJECT_NAME => 'Stripe\\CreditNote',
\Stripe\Customer::OBJECT_NAME => 'Stripe\\Customer',
\Stripe\CustomerBalanceTransaction::OBJECT_NAME => 'Stripe\\CustomerBalanceTransaction',
\Stripe\Discount::OBJECT_NAME => 'Stripe\\Discount',
\Stripe\Dispute::OBJECT_NAME => 'Stripe\\Dispute',
\Stripe\EphemeralKey::OBJECT_NAME => 'Stripe\\EphemeralKey',
\Stripe\Event::OBJECT_NAME => 'Stripe\\Event',
\Stripe\ExchangeRate::OBJECT_NAME => 'Stripe\\ExchangeRate',
\Stripe\ApplicationFeeRefund::OBJECT_NAME => 'Stripe\\ApplicationFeeRefund',
\Stripe\File::OBJECT_NAME => 'Stripe\\File',
\Stripe\File::OBJECT_NAME_ALT => 'Stripe\\File',
\Stripe\FileLink::OBJECT_NAME => 'Stripe\\FileLink',
\Stripe\Invoice::OBJECT_NAME => 'Stripe\\Invoice',
\Stripe\InvoiceItem::OBJECT_NAME => 'Stripe\\InvoiceItem',
\Stripe\InvoiceLineItem::OBJECT_NAME => 'Stripe\\InvoiceLineItem',
\Stripe\IssuerFraudRecord::OBJECT_NAME => 'Stripe\\IssuerFraudRecord',
\Stripe\Issuing\Authorization::OBJECT_NAME => 'Stripe\\Issuing\\Authorization',
\Stripe\Issuing\Card::OBJECT_NAME => 'Stripe\\Issuing\\Card',
\Stripe\Issuing\CardDetails::OBJECT_NAME => 'Stripe\\Issuing\\CardDetails',
\Stripe\Issuing\Cardholder::OBJECT_NAME => 'Stripe\\Issuing\\Cardholder',
\Stripe\Issuing\Dispute::OBJECT_NAME => 'Stripe\\Issuing\\Dispute',
\Stripe\Issuing\Transaction::OBJECT_NAME => 'Stripe\\Issuing\\Transaction',
\Stripe\LoginLink::OBJECT_NAME => 'Stripe\\LoginLink',
\Stripe\Order::OBJECT_NAME => 'Stripe\\Order',
\Stripe\OrderItem::OBJECT_NAME => 'Stripe\\OrderItem',
\Stripe\OrderReturn::OBJECT_NAME => 'Stripe\\OrderReturn',
\Stripe\PaymentIntent::OBJECT_NAME => 'Stripe\\PaymentIntent',
\Stripe\PaymentMethod::OBJECT_NAME => 'Stripe\\PaymentMethod',
\Stripe\Payout::OBJECT_NAME => 'Stripe\\Payout',
\Stripe\Person::OBJECT_NAME => 'Stripe\\Person',
\Stripe\Plan::OBJECT_NAME => 'Stripe\\Plan',
\Stripe\Product::OBJECT_NAME => 'Stripe\\Product',
\Stripe\Radar\EarlyFraudWarning::OBJECT_NAME => 'Stripe\\Radar\\EarlyFraudWarning',
\Stripe\Radar\ValueList::OBJECT_NAME => 'Stripe\\Radar\\ValueList',
\Stripe\Radar\ValueListItem::OBJECT_NAME => 'Stripe\\Radar\\ValueListItem',
\Stripe\Recipient::OBJECT_NAME => 'Stripe\\Recipient',
\Stripe\RecipientTransfer::OBJECT_NAME => 'Stripe\\RecipientTransfer',
\Stripe\Refund::OBJECT_NAME => 'Stripe\\Refund',
\Stripe\Reporting\ReportRun::OBJECT_NAME => 'Stripe\\Reporting\\ReportRun',
\Stripe\Reporting\ReportType::OBJECT_NAME => 'Stripe\\Reporting\\ReportType',
\Stripe\Review::OBJECT_NAME => 'Stripe\\Review',
\Stripe\SetupIntent::OBJECT_NAME => 'Stripe\\SetupIntent',
\Stripe\SKU::OBJECT_NAME => 'Stripe\\SKU',
\Stripe\Sigma\ScheduledQueryRun::OBJECT_NAME => 'Stripe\\Sigma\\ScheduledQueryRun',
\Stripe\Source::OBJECT_NAME => 'Stripe\\Source',
\Stripe\SourceTransaction::OBJECT_NAME => 'Stripe\\SourceTransaction',
\Stripe\Subscription::OBJECT_NAME => 'Stripe\\Subscription',
\Stripe\SubscriptionItem::OBJECT_NAME => 'Stripe\\SubscriptionItem',
\Stripe\SubscriptionSchedule::OBJECT_NAME => 'Stripe\\SubscriptionSchedule',
\Stripe\TaxId::OBJECT_NAME => 'Stripe\\TaxId',
\Stripe\TaxRate::OBJECT_NAME => 'Stripe\\TaxRate',
\Stripe\ThreeDSecure::OBJECT_NAME => 'Stripe\\ThreeDSecure',
\Stripe\Terminal\ConnectionToken::OBJECT_NAME => 'Stripe\\Terminal\\ConnectionToken',
\Stripe\Terminal\Location::OBJECT_NAME => 'Stripe\\Terminal\\Location',
\Stripe\Terminal\Reader::OBJECT_NAME => 'Stripe\\Terminal\\Reader',
\Stripe\Token::OBJECT_NAME => 'Stripe\\Token',
\Stripe\Topup::OBJECT_NAME => 'Stripe\\Topup',
\Stripe\Transfer::OBJECT_NAME => 'Stripe\\Transfer',
\Stripe\TransferReversal::OBJECT_NAME => 'Stripe\\TransferReversal',
\Stripe\UsageRecord::OBJECT_NAME => 'Stripe\\UsageRecord',
\Stripe\UsageRecordSummary::OBJECT_NAME => 'Stripe\\UsageRecordSummary',
\Stripe\WebhookEndpoint::OBJECT_NAME => 'Stripe\\WebhookEndpoint',
];
if (self::isList($resp)) {
$mapped = [];
foreach ($resp as $i) {
array_push($mapped, self::convertToStripeObject($i, $opts));
}
return $mapped;
} elseif (is_array($resp)) {
if (isset($resp['object']) && is_string($resp['object']) && isset($types[$resp['object']])) {
$class = $types[$resp['object']];
} else {
$class = 'Stripe\\StripeObject';
}
return $class::constructFrom($resp, $opts);
} else {
return $resp;
}
}
/**
* @param string|mixed $value A string to UTF8-encode.
*
* @return string|mixed The UTF8-encoded string, or the object passed in if
* it wasn't a string.
*/
public static function utf8($value)
{
if (self::$isMbstringAvailable === null) {
self::$isMbstringAvailable = function_exists('mb_detect_encoding');
if (!self::$isMbstringAvailable) {
trigger_error("It looks like the mbstring extension is not enabled. " .
"UTF-8 strings will not properly be encoded. Ask your system " .
"administrator to enable the mbstring extension, or write to " .
"support@stripe.com if you have any questions.", E_USER_WARNING);
}
}
if (is_string($value) && self::$isMbstringAvailable && mb_detect_encoding($value, "UTF-8", true) != "UTF-8") {
return utf8_encode($value);
} else {
return $value;
}
}
/**
* Compares two strings for equality. The time taken is independent of the
* number of characters that match.
*
* @param string $a one of the strings to compare.
* @param string $b the other string to compare.
* @return bool true if the strings are equal, false otherwise.
*/
public static function secureCompare($a, $b)
{
if (self::$isHashEqualsAvailable === null) {
self::$isHashEqualsAvailable = function_exists('hash_equals');
}
if (self::$isHashEqualsAvailable) {
return hash_equals($a, $b);
} else {
if (strlen($a) != strlen($b)) {
return false;
}
$result = 0;
for ($i = 0; $i < strlen($a); $i++) {
$result |= ord($a[$i]) ^ ord($b[$i]);
}
return ($result == 0);
}
}
/**
* Recursively goes through an array of parameters. If a parameter is an instance of
* ApiResource, then it is replaced by the resource's ID.
* Also clears out null values.
*
* @param mixed $h
* @return mixed
*/
public static function objectsToIds($h)
{
if ($h instanceof \Stripe\ApiResource) {
return $h->id;
} elseif (static::isList($h)) {
$results = [];
foreach ($h as $v) {
array_push($results, static::objectsToIds($v));
}
return $results;
} elseif (is_array($h)) {
$results = [];
foreach ($h as $k => $v) {
if (is_null($v)) {
continue;
}
$results[$k] = static::objectsToIds($v);
}
return $results;
} else {
return $h;
}
}
/**
* @param array $params
*
* @return string
*/
public static function encodeParameters($params)
{
$flattenedParams = self::flattenParams($params);
$pieces = [];
foreach ($flattenedParams as $param) {
list($k, $v) = $param;
array_push($pieces, self::urlEncode($k) . '=' . self::urlEncode($v));
}
return implode('&', $pieces);
}
/**
* @param array $params
* @param string|null $parentKey
*
* @return array
*/
public static function flattenParams($params, $parentKey = null)
{
$result = [];
foreach ($params as $key => $value) {
$calculatedKey = $parentKey ? "{$parentKey}[{$key}]" : $key;
if (self::isList($value)) {
$result = array_merge($result, self::flattenParamsList($value, $calculatedKey));
} elseif (is_array($value)) {
$result = array_merge($result, self::flattenParams($value, $calculatedKey));
} else {
array_push($result, [$calculatedKey, $value]);
}
}
return $result;
}
/**
* @param array $value
* @param string $calculatedKey
*
* @return array
*/
public static function flattenParamsList($value, $calculatedKey)
{
$result = [];
foreach ($value as $i => $elem) {
if (self::isList($elem)) {
$result = array_merge($result, self::flattenParamsList($elem, $calculatedKey));
} elseif (is_array($elem)) {
$result = array_merge($result, self::flattenParams($elem, "{$calculatedKey}[{$i}]"));
} else {
array_push($result, ["{$calculatedKey}[{$i}]", $elem]);
}
}
return $result;
}
/**
* @param string $key A string to URL-encode.
*
* @return string The URL-encoded string.
*/
public static function urlEncode($key)
{
$s = urlencode($key);
// Don't use strict form encoding by changing the square bracket control
// characters back to their literals. This is fine by the server, and
// makes these parameter strings easier to read.
$s = str_replace('%5B', '[', $s);
$s = str_replace('%5D', ']', $s);
return $s;
}
public static function normalizeId($id)
{
if (is_array($id)) {
$params = $id;
$id = $params['id'];
unset($params['id']);
} else {
$params = [];
}
return [$id, $params];
}
/**
* Returns UNIX timestamp in milliseconds
*
* @return integer current time in millis
*/
public static function currentTimeMillis()
{
return (int) round(microtime(true) * 1000);
}
}
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