<?php
  
  /**
   * This file is part of the Carbon package.
   *
   * (c) Brian Nesbitt <brian@nesbot.com>
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  namespace Carbon\PHPStan;
  
  use Carbon\CarbonInterface;
  use PHPStan\Reflection\ReflectionProvider;
  use ReflectionClass;
  use ReflectionException;
  
  final class MacroScanner
  {
      /**
       * @var \PHPStan\Reflection\ReflectionProvider
       */
      private $reflectionProvider;
  
      /**
       * MacroScanner constructor.
       *
       * @param \PHPStan\Reflection\ReflectionProvider $reflectionProvider
       */
      public function __construct(ReflectionProvider $reflectionProvider)
      {
          $this->reflectionProvider = $reflectionProvider;
      }
  
      /**
       * Return true if the given pair class-method is a Carbon macro.
       *
       * @param class-string $className
       * @param string       $methodName
       *
       * @return bool
       */
      public function hasMethod(string $className, string $methodName): bool
      {
          $classReflection = $this->reflectionProvider->getClass($className);
  
          if (
              $classReflection->getName() !== CarbonInterface::class &&
              !$classReflection->isSubclassOf(CarbonInterface::class)
          ) {
              return false;
          }
  
          return \is_callable([$className, 'hasMacro']) &&
              $className::hasMacro($methodName);
      }
  
      /**
       * Return the Macro for a given pair class-method.
       *
       * @param class-string $className
       * @param string       $methodName
       *
       * @throws ReflectionException
       *
       * @return Macro
       */
      public function getMethod(string $className, string $methodName): Macro
      {
          $reflectionClass = new ReflectionClass($className);
          $property = $reflectionClass->getProperty('globalMacros');
  
          $property->setAccessible(true);
          $macro = $property->getValue()[$methodName];
  
          return new Macro(
              $className,
              $methodName,
              $macro
          );
      }
  }