# FileSystem Package Gap Analysis

## Overview

This document analyzes the gaps between our current filesystem handling (in Core package) and Laravel's FileSystem package functionality, identifying what needs to be implemented as a standalone FileSystem package.

> **Related Documentation**
> - See [FileSystem Package Specification](filesystem_package_specification.md) for current implementation
> - See [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md) for overall status
> - See [Foundation Integration Guide](foundation_integration_guide.md) for integration patterns
> - See [Testing Guide](testing_guide.md) for testing approaches
> - See [Getting Started Guide](getting_started.md) for development setup

## Implementation Gaps

### 1. Missing Package Structure
```dart
// Need to create dedicated FileSystem package:

packages/filesystem/
├── lib/
│   ├── src/
│   │   ├── filesystem.dart
│   │   ├── filesystem_manager.dart
│   │   ├── drivers/
│   │   │   ├── local_driver.dart
│   │   │   ├── s3_driver.dart
│   │   │   └── gcs_driver.dart
│   │   └── contracts/
│   │       ├── filesystem.dart
│   │       └── driver.dart
│   └── filesystem.dart
├── test/
└── example/
```

### 2. Missing Core Features
```dart
// 1. Filesystem Manager
class FilesystemManager {
  // Need to implement:
  Filesystem disk([String? name]);
  void extend(String driver, FilesystemDriver Function() callback);
  FilesystemDriver createDriver(Map<String, dynamic> config);
}

// 2. Filesystem Implementation
class Filesystem {
  // Need to implement:
  Future<bool> exists(String path);
  Future<String> get(String path);
  Future<void> put(String path, dynamic contents, [Map<String, String>? options]);
  Future<void> delete(String path);
  Future<void> copy(String from, String to);
  Future<void> move(String from, String to);
  Future<String> url(String path);
  Future<Stream<List<int>>> readStream(String path);
  Future<void> writeStream(String path, Stream<List<int>> contents);
}

// 3. Driver Implementations
class LocalDriver {
  // Need to implement:
  Future<void> ensureDirectory(String path);
  Future<void> setVisibility(String path, String visibility);
  Future<Map<String, dynamic>> getMetadata(String path);
}
```

### 3. Missing Laravel Features
```dart
// 1. Cloud Storage
class S3Driver {
  // Need to implement:
  Future<void> upload(String path, dynamic contents, String visibility);
  Future<String> temporaryUrl(String path, Duration expiration);
  Future<void> setVisibility(String path, String visibility);
}

// 2. Directory Operations
class DirectoryOperations {
  // Need to implement:
  Future<List<String>> files(String directory);
  Future<List<String>> allFiles(String directory);
  Future<List<String>> directories(String directory);
  Future<List<String>> allDirectories(String directory);
  Future<void> makeDirectory(String path);
  Future<void> deleteDirectory(String directory);
}

// 3. File Visibility
class VisibilityConverter {
  // Need to implement:
  String toOctal(String visibility);
  String fromOctal(String permissions);
  bool isPublic(String path);
  bool isPrivate(String path);
}
```

## Integration Gaps

### 1. Container Integration
```dart
// Need to implement:

class FilesystemServiceProvider {
  void register() {
    // Register filesystem manager
    container.singleton<FilesystemManager>((c) =>
      FilesystemManager(
        config: c.make<ConfigContract>()
      )
    );
    
    // Register default filesystem
    container.singleton<Filesystem>((c) =>
      c.make<FilesystemManager>().disk()
    );
  }
}
```

### 2. Config Integration
```dart
// Need to implement:

// config/filesystems.dart
class FilesystemsConfig {
  static Map<String, dynamic> get config => {
    'default': 'local',
    'disks': {
      'local': {
        'driver': 'local',
        'root': 'storage/app'
      },
      's3': {
        'driver': 's3',
        'key': env('AWS_ACCESS_KEY_ID'),
        'secret': env('AWS_SECRET_ACCESS_KEY'),
        'region': env('AWS_DEFAULT_REGION'),
        'bucket': env('AWS_BUCKET')
      }
    }
  };
}
```

### 3. Event Integration
```dart
// Need to implement:

class FilesystemEvents {
  // File events
  static const String writing = 'filesystem.writing';
  static const String written = 'filesystem.written';
  static const String deleting = 'filesystem.deleting';
  static const String deleted = 'filesystem.deleted';
  
  // Directory events
  static const String makingDirectory = 'filesystem.making_directory';
  static const String madeDirectory = 'filesystem.made_directory';
  static const String deletingDirectory = 'filesystem.deleting_directory';
  static const String deletedDirectory = 'filesystem.deleted_directory';
}
```

## Documentation Gaps

### 1. Missing API Documentation
```dart
// Need to document:

/// Manages filesystem operations across multiple storage drivers.
/// 
/// Provides a unified API for working with files across different storage systems:
/// ```dart
/// // Store a file
/// await storage.put('avatars/user1.jpg', fileContents);
/// 
/// // Get a file
/// var contents = await storage.get('avatars/user1.jpg');
/// ```
class Filesystem {
  /// Stores a file at the specified path.
  /// 
  /// Options can include:
  /// - visibility: 'public' or 'private'
  /// - mime: MIME type of the file
  Future<void> put(String path, dynamic contents, [Map<String, String>? options]);
}
```

### 2. Missing Usage Examples
```dart
// Need examples for:

// 1. Basic File Operations
var storage = Storage.disk();
await storage.put('file.txt', 'Hello World');
var contents = await storage.get('file.txt');
await storage.delete('file.txt');

// 2. Stream Operations
var fileStream = File('large.zip').openRead();
await storage.writeStream('uploads/large.zip', fileStream);
var downloadStream = await storage.readStream('uploads/large.zip');

// 3. Cloud Storage
var s3 = Storage.disk('s3');
await s3.put(
  'images/photo.jpg',
  photoBytes,
  {'visibility': 'public'}
);
var url = await s3.url('images/photo.jpg');
```

### 3. Missing Test Coverage
```dart
// Need tests for:

void main() {
  group('Local Driver', () {
    test('handles file operations', () async {
      var storage = Filesystem(LocalDriver(root: 'storage'));
      
      await storage.put('test.txt', 'contents');
      expect(await storage.exists('test.txt'), isTrue);
      expect(await storage.get('test.txt'), equals('contents'));
      
      await storage.delete('test.txt');
      expect(await storage.exists('test.txt'), isFalse);
    });
  });
  
  group('S3 Driver', () {
    test('handles cloud operations', () async {
      var storage = Filesystem(S3Driver(config));
      
      await storage.put('test.txt', 'contents', {
        'visibility': 'public'
      });
      
      var url = await storage.url('test.txt');
      expect(url, startsWith('https://'));
    });
  });
}
```

## Implementation Priority

1. **High Priority**
   - Create FileSystem package structure
   - Implement core filesystem
   - Add local driver
   - Add basic operations

2. **Medium Priority**
   - Add cloud drivers
   - Add streaming support
   - Add directory operations
   - Add container integration

3. **Low Priority**
   - Add helper functions
   - Add testing utilities
   - Add debugging tools

## Next Steps

1. **Package Creation**
   - Create package structure
   - Move filesystem code from Core
   - Add package dependencies
   - Setup testing

2. **Core Implementation**
   - Implement FilesystemManager
   - Implement Filesystem
   - Implement LocalDriver
   - Add cloud drivers

3. **Integration Implementation**
   - Add container integration
   - Add config support
   - Add event support
   - Add service providers

Would you like me to:
1. Create the FileSystem package structure?
2. Start implementing core features?
3. Create detailed implementation plans?

## Development Guidelines

### 1. Getting Started
Before implementing filesystem features:
1. Review [Getting Started Guide](getting_started.md)
2. Check [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md)
3. Follow [Testing Guide](testing_guide.md)
4. Use [Foundation Integration Guide](foundation_integration_guide.md)
5. Review [FileSystem Package Specification](filesystem_package_specification.md)

### 2. Implementation Process
For each filesystem feature:
1. Write tests following [Testing Guide](testing_guide.md)
2. Implement following Laravel patterns
3. Document following [Getting Started Guide](getting_started.md#documentation)
4. Integrate following [Foundation Integration Guide](foundation_integration_guide.md)

### 3. Quality Requirements
All implementations must:
1. Pass all tests (see [Testing Guide](testing_guide.md))
2. Meet Laravel compatibility requirements
3. Follow integration patterns (see [Foundation Integration Guide](foundation_integration_guide.md))
4. Match specifications in [FileSystem Package Specification](filesystem_package_specification.md)

### 4. Integration Considerations
When implementing filesystem features:
1. Follow patterns in [Foundation Integration Guide](foundation_integration_guide.md)
2. Ensure Laravel compatibility per [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md)
3. Use testing approaches from [Testing Guide](testing_guide.md)
4. Follow development setup in [Getting Started Guide](getting_started.md)

### 5. Performance Guidelines
Filesystem system must:
1. Handle large files efficiently
2. Use streaming where appropriate
3. Minimize memory usage
4. Support concurrent operations
5. Meet performance targets in [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md#performance-benchmarks)

### 6. Testing Requirements
Filesystem tests must:
1. Cover all file operations
2. Test streaming behavior
3. Verify cloud storage
4. Check metadata handling
5. Follow patterns in [Testing Guide](testing_guide.md)

### 7. Documentation Requirements
Filesystem documentation must:
1. Explain filesystem patterns
2. Show driver examples
3. Cover error handling
4. Include performance tips
5. Follow standards in [Getting Started Guide](getting_started.md#documentation)