class DirectoryTest

class DirectoryTest extends FileTestBase {
    
    /**
     * Tests local directory handling functions.
     */
    public function testFileCheckLocalDirectoryHandling() : void {
        $site_path = $this->container
            ->getParameter('site.path');
        $directory = $site_path . '/files';
        // Check a new recursively created local directory for correct file system
        // permissions.
        $parent = $this->randomMachineName();
        $child = $this->randomMachineName();
        // Files directory already exists.
        $this->assertDirectoryExists($directory);
        // Make files directory writable only.
        $old_mode = fileperms($directory);
        // Create the directories.
        $parent_path = $directory . DIRECTORY_SEPARATOR . $parent;
        $child_path = $parent_path . DIRECTORY_SEPARATOR . $child;
        
        /** @var \Drupal\Core\File\FileSystemInterface $file_system */
        $file_system = \Drupal::service('file_system');
        $this->assertTrue($file_system->mkdir($child_path, 0775, TRUE), 'No error reported when creating new local directories.');
        // Ensure new directories also exist.
        $this->assertDirectoryExists($parent_path);
        $this->assertDirectoryExists($child_path);
        // Check that new directory permissions were set properly.
        $this->assertDirectoryPermissions($parent_path, 0775);
        $this->assertDirectoryPermissions($child_path, 0775);
        // Check that existing directory permissions were not modified.
        $this->assertDirectoryPermissions($directory, $old_mode);
        // Check creating a directory using an absolute path.
        $absolute_path = $file_system->realpath($directory) . DIRECTORY_SEPARATOR . $this->randomMachineName() . DIRECTORY_SEPARATOR . $this->randomMachineName();
        $this->assertTrue($file_system->mkdir($absolute_path, 0775, TRUE), 'No error reported when creating new absolute directories.');
        $this->assertDirectoryPermissions($absolute_path, 0775);
    }
    
    /**
     * Tests directory handling functions.
     */
    public function testFileCheckDirectoryHandling() : void {
        // A directory to operate on.
        $default_scheme = 'public';
        $directory = $default_scheme . '://' . $this->randomMachineName() . '/' . $this->randomMachineName();
        $this->assertDirectoryDoesNotExist($directory);
        // Non-existent directory.
        
        /** @var \Drupal\Core\File\FileSystemInterface $file_system */
        $file_system = \Drupal::service('file_system');
        $this->assertFalse($file_system->prepareDirectory($directory, 0), 'Error reported for non-existing directory.');
        // Make a directory.
        $this->assertTrue($file_system->prepareDirectory($directory, FileSystemInterface::CREATE_DIRECTORY), 'No error reported when creating a new directory.');
        // Make sure directory actually exists.
        $this->assertDirectoryExists($directory);
        $file_system = \Drupal::service('file_system');
        if (!str_starts_with(PHP_OS, 'WIN')) {
            // PHP on Windows doesn't support any kind of useful read-only mode for
            // directories. When executing a chmod() on a directory, PHP only sets the
            // read-only flag, which doesn't prevent files to actually be written
            // in the directory on any recent version of Windows.
            // Make directory read only.
            @$file_system->chmod($directory, 0444);
            $this->assertFalse($file_system->prepareDirectory($directory, 0), 'Error reported for a non-writable directory.');
            // Test directory permission modification.
            $this->setSetting('file_chmod_directory', 0777);
            $this->assertTrue($file_system->prepareDirectory($directory, FileSystemInterface::MODIFY_PERMISSIONS), 'No error reported when making directory writable.');
        }
        // Test that the directory has the correct permissions.
        $this->assertDirectoryPermissions($directory, 0777, 'file_chmod_directory setting is respected.');
        // Remove .htaccess file to then test that it gets re-created.
        @$file_system->unlink($default_scheme . '://.htaccess');
        $this->assertFileDoesNotExist($default_scheme . '://.htaccess');
        $this->container
            ->get('file.htaccess_writer')
            ->ensure();
        $this->assertFileExists($default_scheme . '://.htaccess');
        // Remove .htaccess file again to test that it is re-created by a cron run.
        @$file_system->unlink($default_scheme . '://.htaccess');
        $this->assertFileDoesNotExist($default_scheme . '://.htaccess');
        system_cron();
        $this->assertFileExists($default_scheme . '://.htaccess');
        // Verify contents of .htaccess file.
        $file = file_get_contents($default_scheme . '://.htaccess');
        $this->assertEquals(FileSecurity::htaccessLines(FALSE), $file, 'The .htaccess file contains the proper content.');
    }
    
    /**
     * Tests the file paths of newly created files.
     */
    public function testFileCreateNewFilepath() : void {
        // First we test against an imaginary file that does not exist in a
        // directory.
        $basename = 'xyz.txt';
        $directory = 'core/misc';
        $original = $directory . '/' . $basename;
        
        /** @var \Drupal\Core\File\FileSystemInterface $file_system */
        $file_system = \Drupal::service('file_system');
        $path = $file_system->createFilename($basename, $directory);
        $this->assertEquals($original, $path, "New filepath {$path} equals {$original}.");
        // Then we test against a file that already exists within that directory.
        $basename = 'druplicon.png';
        $original = $directory . '/' . $basename;
        $expected = $directory . '/druplicon_0.png';
        $path = $file_system->createFilename($basename, $directory);
        $this->assertEquals($expected, $path, "Creating a new filepath from {$path} equals {$original} (expected {$expected}).");
        // @todo Finally we copy a file into a directory several times, to ensure a properly iterating filename suffix.
    }
    
    /**
     * Tests the destination file path.
     *
     * This will test the filepath for a destination based on passed flags and
     * whether or not the file exists.
     *
     * If a file exists, ::getDestinationFilename($destination, $replace) will
     * either return:
     * - the existing filepath, if $replace is FileExists::Replace
     * - a new filepath if FileExists::Rename
     * - an error (returning FALSE) if FileExists::Error.
     * If the file doesn't currently exist, then it will simply return the
     * filepath.
     */
    public function testFileDestination() : void {
        // First test for non-existent file.
        $destination = 'core/misc/xyz.txt';
        
        /** @var \Drupal\Core\File\FileSystemInterface $file_system */
        $file_system = \Drupal::service('file_system');
        $path = $file_system->getDestinationFilename($destination, FileExists::Replace);
        $this->assertEquals($destination, $path, 'Non-existing filepath destination is correct with FileExists::Replace.');
        $path = $file_system->getDestinationFilename($destination, FileExists::Rename);
        $this->assertEquals($destination, $path, 'Non-existing filepath destination is correct with FileExists::Rename.');
        $path = $file_system->getDestinationFilename($destination, FileExists::Error);
        $this->assertEquals($destination, $path, 'Non-existing filepath destination is correct with FileExists::Error.');
        $destination = 'core/misc/druplicon.png';
        $path = $file_system->getDestinationFilename($destination, FileExists::Replace);
        $this->assertEquals($destination, $path, 'Existing filepath destination remains the same with FileExists::Replace.');
        $path = $file_system->getDestinationFilename($destination, FileExists::Rename);
        $this->assertNotEquals($destination, $path, 'A new filepath destination is created when filepath destination already exists with FileExists::Rename.');
        $path = $file_system->getDestinationFilename($destination, FileExists::Error);
        $this->assertFalse($path, 'An error is returned when filepath destination already exists with FileExists::Error.');
        // Invalid UTF-8 causes an exception.
        $this->expectException(FileException::class);
        $this->expectExceptionMessage("Invalid filename 'a\xfftest\x80€.txt'");
        $file_system->getDestinationFilename("core/misc/a\xfftest\x80€.txt", FileExists::Replace);
    }
    
    /**
     * Ensure that the getTempDirectory() method always returns a value.
     */
    public function testFileDirectoryTemp() : void {
        $tmp_directory = \Drupal::service('file_system')->getTempDirectory();
        $this->assertNotEmpty($tmp_directory);
        $this->assertEquals($tmp_directory, FileSystem::getOsTemporaryDirectory());
    }
    
    /**
     * Tests directory creation.
     */
    public function testDirectoryCreation() : void {
        
        /** @var \Drupal\Core\File\FileSystemInterface $file_system */
        $file_system = $this->container
            ->get('file_system');
        // mkdir() recursion should work with or without a trailing slash.
        $dir = $this->siteDirectory . '/files';
        $this->assertTrue($file_system->mkdir($dir . '/foo/bar', 0775, TRUE));
        $this->assertTrue($file_system->mkdir($dir . '/foo/baz/', 0775, TRUE));
    }
    
    /**
     * Tests asynchronous directory creation.
     *
     * Image style generation can result in many calls to create similar directory
     * paths. This test forks the process to create the same situation.
     */
    public function testMultiplePrepareDirectory() : void {
        if (!function_exists('pcntl_fork')) {
            $this->markTestSkipped('Requires the pcntl_fork() function');
        }
        $directories = [];
        for ($i = 1; $i <= 10; $i++) {
            $directories[] = 'public://a/b/c/d/e/f/g/h/' . $i;
        }
        $file_system = $this->container
            ->get('file_system');
        $time_to_start = microtime(TRUE) + 0.1;
        // This loop creates a new fork to create each directory.
        foreach ($directories as $directory) {
            $pid = pcntl_fork();
            if ($pid == -1) {
                $this->fail("Error forking");
            }
            elseif ($pid == 0) {
                // Sleep so that all the forks start preparing the directory at the same
                // time.
                usleep((int) (($time_to_start - microtime(TRUE)) * 1000000));
                $file_system->prepareDirectory($directory, FileSystemInterface::CREATE_DIRECTORY);
                exit;
            }
        }
        // This while loop holds the parent process until all the child threads
        // are complete - at which point the script continues to execute.
        while (pcntl_waitpid(0, $status) != -1) {
        }
        foreach ($directories as $directory) {
            $this->assertDirectoryExists($directory);
        }
        // Remove the database connection because it will have been destroyed when
        // the forks exited. This allows
        // \Drupal\KernelTests\KernelTestBase::tearDown() to reopen it.
        Database::removeConnection('default');
    }

}