class Composer

class Composer {
    
    /**
     * Add vendor classes to Composer's static classmap.
     *
     * @param \Composer\Script\Event $event
     *   The event.
     */
    public static function preAutoloadDump(Event $event) {
        // Get the configured vendor directory.
        $vendor_dir = $event->getComposer()
            ->getConfig()
            ->get('vendor-dir');
        // We need the root package so we can add our classmaps to its loader.
        $package = $event->getComposer()
            ->getPackage();
        // We need the local repository so that we can query and see if it's likely
        // that our files are present there.
        $repository = $event->getComposer()
            ->getRepositoryManager()
            ->getLocalRepository();
        // This is, essentially, a null constraint. We only care whether the package
        // is present in the vendor directory yet, but findPackage() requires it.
        $constraint = new Constraint('>', '');
        // It's possible that there is no classmap specified in a custom project
        // composer.json file. We need one so we can optimize lookup for some of our
        // dependencies.
        $autoload = $package->getAutoload();
        if (!isset($autoload['classmap'])) {
            $autoload['classmap'] = [];
        }
        // Check for packages used prior to the default classloader being able to
        // use APCu and optimize them if they're present.
        // @see \Drupal\Core\DrupalKernel::boot()
        if ($repository->findPackage('symfony/http-foundation', $constraint)) {
            $autoload['classmap'] = array_merge($autoload['classmap'], [
                $vendor_dir . '/symfony/http-foundation/Request.php',
                $vendor_dir . '/symfony/http-foundation/RequestStack.php',
                $vendor_dir . '/symfony/http-foundation/ParameterBag.php',
                $vendor_dir . '/symfony/http-foundation/FileBag.php',
                $vendor_dir . '/symfony/http-foundation/ServerBag.php',
                $vendor_dir . '/symfony/http-foundation/HeaderBag.php',
                $vendor_dir . '/symfony/http-foundation/HeaderUtils.php',
            ]);
        }
        if ($repository->findPackage('symfony/http-kernel', $constraint)) {
            $autoload['classmap'] = array_merge($autoload['classmap'], [
                $vendor_dir . '/symfony/http-kernel/HttpKernel.php',
                $vendor_dir . '/symfony/http-kernel/HttpKernelInterface.php',
                $vendor_dir . '/symfony/http-kernel/TerminableInterface.php',
            ]);
        }
        if ($repository->findPackage('symfony/dependency-injection', $constraint)) {
            $autoload['classmap'] = array_merge($autoload['classmap'], [
                $vendor_dir . '/symfony/dependency-injection/ContainerInterface.php',
            ]);
        }
        if ($repository->findPackage('psr/container', $constraint)) {
            $autoload['classmap'] = array_merge($autoload['classmap'], [
                $vendor_dir . '/psr/container/src/ContainerInterface.php',
            ]);
        }
        $package->setAutoload($autoload);
    }
    
    /**
     * Fires the drupal-phpunit-upgrade script event if necessary.
     *
     * @param \Composer\Script\Event $event
     *   The event.
     *
     * @internal
     */
    public static function upgradePHPUnit(Event $event) {
        $repository = $event->getComposer()
            ->getRepositoryManager()
            ->getLocalRepository();
        // This is, essentially, a null constraint. We only care whether the package
        // is present in the vendor directory yet, but findPackage() requires it.
        $constraint = new Constraint('>', '');
        $phpunit_package = $repository->findPackage('phpunit/phpunit', $constraint);
        if (!$phpunit_package) {
            // There is nothing to do. The user is probably installing using the
            // --no-dev flag.
            return;
        }
        // If the PHP version is 7.4 or above and PHPUnit is less than version 9
        // call the drupal-phpunit-upgrade script to upgrade PHPUnit.
        if (!static::upgradePHPUnitCheck($phpunit_package->getVersion())) {
            $event->getComposer()
                ->getEventDispatcher()
                ->dispatchScript('drupal-phpunit-upgrade');
        }
    }
    
    /**
     * Determines if PHPUnit needs to be upgraded.
     *
     * This method is located in this file because it is possible that it is
     * called before the autoloader is available.
     *
     * @param string $phpunit_version
     *   The PHPUnit version string.
     *
     * @return bool
     *   TRUE if the PHPUnit needs to be upgraded, FALSE if not.
     *
     * @internal
     */
    public static function upgradePHPUnitCheck($phpunit_version) {
        return !(version_compare(PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION, '7.4') >= 0 && version_compare($phpunit_version, '9.0') < 0);
    }

}