Filesystem Laravel Package

## Getting Started

### Minimal Setup
1. **Installation**:
   ```bash
   composer require fidry/filesystem

Register the package in config/app.php under providers:

Fidry\FileSystem\FileSystemServiceProvider::class,

2. Basic Usage: Bind the FileSystem interface in your service container:

   $this->app->bind(FileSystem::class, NativeFileSystem::class);
   

   Or use the static FS helper for quick operations:

   use Fidry\FileSystem\FS;
   
   FS::touch('test.txt'); // Creates a file
   

3. First Use Case: Replace Laravel’s native filesystem operations (e.g., Storage::put()) with this package for cross-platform path handling:

   $path = FS::escapePath('C:/path/to/file'); // Converts to `C:\path\to\file` on Windows
   FS::dumpFile($path, 'Hello, World!'); // Writes content
   

Implementation Patterns

Dependency Injection

• Bind the Interface: Prefer dependency injection for testability:

  $this->app->bind(FileSystem::class, function () {
      return new NativeFileSystem();
  });
  

• Read-Only Mode: Use ReadOnlyFileSystem in tests or read-heavy environments:

  $readOnlyFS = new ReadOnlyFileSystem(failOnWrite: true);
  

Path Handling

• Cross-Platform Paths: Normalize paths for consistency:

  $normalized = FS::normalizedRealPath('C:\Users\Name\file.txt'); // Returns `C:/Users/Name/file.txt`
  

• Temporary Files/Directories: Generate safe temp files/dirs:

  $tempFile = FS::tmpFile('upload', '.tmp'); // e.g., `/tmp/upload1234.tmp`
  $tempDir = FS::tmpDir('cache'); // e.g., `/tmp/cache5678`
  

Testing

• TestCase Integration: Extend FileSystemTestCase for isolated tests:

  class MyTest extends FileSystemTestCase {
      public function test_file_operations() {
          FS::dumpFile('test.txt', 'content');
          $this->assertFileExists('test.txt');
      }
  }
  

• Mocking SplFileInfo: Use SplFileInfoBuilder to avoid verbose mocks:

  $fakeFile = SplFileInfoBuilder::withTestData()
      ->withFile('test.txt')
      ->withContents('mocked')
      ->build();
  

Finder Integration

• Custom Finder: Create a Finder instance with the package:

  $finder = FS::createFinder()
      ->files()
      ->in(storage_path('app'));
  

Gotchas and Tips

Pitfalls

1. Path Normalization:

   • realPath() vs. normalizedRealPath(): The former preserves OS-specific separators (e.g., \ on Windows), while the latter forces /.
   • Fix: Use normalizedRealPath() for consistent paths in logs/URLs.

2. Temporary Files:

   • tmpFile()/tmpDir() may fail if the target directory lacks write permissions.
   • Fix: Specify a custom directory:

     FS::tmpFile('data', '.tmp', storage_path('framework/cache'));
     

3. Read-Only Mode:

   • ReadOnlyFileSystem silently ignores writes when failOnWrite: false. Enable failOnWrite: true to catch accidental writes in tests.

4. Symfony Finder SplFileInfo:

   • The getContents() method is deprecated in Symfony 7.1+. Use FS::readFile() instead:

     $content = FS::readFile($filePath);
     

Debugging Tips

• Path Issues: Use FS::escapePath() to debug cross-platform path inconsistencies.
• Permission Errors: Check isReadable() before operations:

  if (!FS::isReadable($file)) {
      throw new \RuntimeException("File not readable: {$file}");
  }
  

Extension Points

1. Custom Stream Wrappers:

   • Override NativeFileSystem to support custom streams (e.g., S3, SFTP):

     class CustomFileSystem extends NativeFileSystem {
         protected function getStreamWrapper(): string {
             return 's3://';
         }
     }
     

2. Test Isolation:

   • Override getTmpDirPrefix() in FileSystemTestCase to avoid conflicts:

     protected function getTmpDirPrefix(): string {
         return 'myapp_';
     }
     

3. Legacy Code:

   • Replace deprecated SplFileInfo::getContents() with FS::readFile() in tests:

     $content = FS::readFile($filePath); // Modern alternative
     

Performance

• Batch Operations: Use Finder for bulk file operations (e.g., renaming, deleting):

  FS::createFinder()
      ->files()
      ->in($directory)
      ->each(function (SplFileInfo $file) {
          FS::rename($file->getPathname(), $file->getPathname() . '.bak');
      });
  

Laravel-Specific

• Storage Integration:
  • Replace Laravel’s Storage::disk() calls for filesystem operations:

    $filesystem = app(FileSystem::class);
    $filesystem->put('file.txt', 'content'); // Uses Laravel’s filesystem adapter
    

• Artisan Commands:
  • Use FS for CLI scripts to avoid DI overhead:

    use Fidry\FileSystem\FS;
    
    FS::mkdir(storage_path('logs/backup'));
    

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