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<?php
/**
* SCSSPHP
*
* @copyright 2012-2020 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://scssphp.github.io/scssphp
*/
namespace ScssPhp\ScssPhp;
final class Warn
{
/**
* @var callable|null
* @phpstan-var (callable(string, bool): void)|null
*/
private static $callback;
/**
* Prints a warning message associated with the current `@import` or function call.
*
* This may only be called within a custom function or importer callback.
*
* @param string $message
*
* @return void
*/
public static function warning($message)
{
self::reportWarning($message, false);
}
/**
* Prints a deprecation warning message associated with the current `@import` or function call.
*
* This may only be called within a custom function or importer callback.
*
* @param string $message
*
* @return void
*/
public static function deprecation($message)
{
self::reportWarning($message, true);
}
/**
* @param callable|null $callback
*
* @return callable|null The previous warn callback
*
* @phpstan-param (callable(string, bool): void)|null $callback
*
* @phpstan-return (callable(string, bool): void)|null
*
* @internal
*/
public static function setCallback(callable $callback = null)
{
$previousCallback = self::$callback;
self::$callback = $callback;
return $previousCallback;
}
/**
* @param string $message
* @param bool $deprecation
*
* @return void
*/
private static function reportWarning($message, $deprecation)
{
if (self::$callback === null) {
throw new \BadMethodCallException('The warning Reporter may only be called within a custom function or importer callback.');
}
\call_user_func(self::$callback, $message, $deprecation);
}
}