# Process Package Gap Analysis

## Overview

This document analyzes the gaps between our Process package's actual implementation and Laravel's process functionality, identifying areas that need implementation or documentation updates.

> **Related Documentation**
> - See [Process Package Specification](process_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
> - See [Events Package Specification](events_package_specification.md) for process events
> - See [Queue Package Specification](queue_package_specification.md) for background processing

## Implementation Gaps

### 1. Missing Laravel Features
```dart
// Documented but not implemented:

// 1. Process Pipelines
class ProcessPipeline {
  // Need to implement:
  Future<ProcessResult> pipe(String command);
  Future<ProcessResult> pipeThrough(List<String> commands);
  Future<ProcessResult> pipeInput(String input);
  Future<ProcessResult> pipeOutput(String file);
  Future<ProcessResult> pipeErrorOutput(String file);
}

// 2. Process Scheduling
class ProcessScheduler {
  // Need to implement:
  void schedule(String command, String frequency);
  void daily(String command, [String time = '00:00']);
  void weekly(String command, [int day = 0]);
  void monthly(String command, [int day = 1]);
  void cron(String expression, String command);
}

// 3. Process Monitoring
class ProcessMonitor {
  // Need to implement:
  Future<bool> isRunning(int pid);
  Future<ProcessStats> getStats(int pid);
  Future<void> onExit(int pid, Function callback);
  Future<void> onOutput(int pid, Function callback);
  Future<void> onError(int pid, Function callback);
}
```

### 2. Missing Process Features
```dart
// Need to implement:

// 1. Process Groups
class ProcessGroup {
  // Need to implement:
  Future<void> start();
  Future<void> stop();
  Future<void> restart();
  Future<List<ProcessResult>> wait();
  Future<void> signal(ProcessSignal signal);
  bool isRunning();
}

// 2. Process Isolation
class ProcessIsolation {
  // Need to implement:
  void setUser(String user);
  void setGroup(String group);
  void setWorkingDirectory(String directory);
  void setEnvironment(Map<String, String> env);
  void setResourceLimits(ResourceLimits limits);
}

// 3. Process Recovery
class ProcessRecovery {
  // Need to implement:
  void onCrash(Function callback);
  void onHang(Function callback);
  void onHighMemory(Function callback);
  void onHighCpu(Function callback);
  void restart();
}
```

### 3. Missing Integration Features
```dart
// Need to implement:

// 1. Queue Integration
class QueuedProcess {
  // Need to implement:
  Future<void> queue(String command);
  Future<void> laterOn(String queue, Duration delay, String command);
  Future<void> chain(List<String> commands);
  Future<void> release(Duration delay);
}

// 2. Event Integration
class ProcessEvents {
  // Need to implement:
  void beforeStart(Function callback);
  void afterStart(Function callback);
  void beforeStop(Function callback);
  void afterStop(Function callback);
  void onOutput(Function callback);
  void onError(Function callback);
}

// 3. Logging Integration
class ProcessLogging {
  // Need to implement:
  void enableLogging();
  void setLogFile(String path);
  void setLogLevel(LogLevel level);
  void rotateLog();
  void purgeOldLogs(Duration age);
}
```

## Documentation Gaps

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

/// Pipes process output.
/// 
/// Example:
/// ```dart
/// await process
///   .pipe('sort')
///   .pipe('uniq')
///   .pipeOutput('output.txt');
/// ```
Future<ProcessResult> pipe(String command);

/// Schedules process execution.
///
/// Example:
/// ```dart
/// scheduler.daily('backup.sh', '02:00');
/// scheduler.weekly('cleanup.sh', DateTime.sunday);
/// scheduler.cron('0 * * * *', 'hourly.sh');
/// ```
void schedule(String command, String frequency);
```

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

// 1. Process Groups
var group = ProcessGroup();
group.add('web-server', '--port=8080');
group.add('worker', '--queue=default');
await group.start();

// 2. Process Recovery
var recovery = ProcessRecovery(process);
recovery.onCrash(() async {
  await notifyAdmin('Process crashed');
  await process.restart();
});

// 3. Process Monitoring
var monitor = ProcessMonitor(process);
monitor.onHighMemory((usage) async {
  await process.restart();
  await notifyAdmin('High memory usage: $usage');
});
```

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

void main() {
  group('Process Pipelines', () {
    test('pipes process output', () async {
      var process = await manager.start('ls');
      var result = await process
        .pipe('sort')
        .pipe('uniq')
        .pipeOutput('output.txt');
      
      expect(result.exitCode, equals(0));
      expect(File('output.txt').existsSync(), isTrue);
    });
  });
  
  group('Process Scheduling', () {
    test('schedules daily tasks', () async {
      var scheduler = ProcessScheduler();
      scheduler.daily('backup.sh', '02:00');
      
      var nextRun = scheduler.getNextRun('backup.sh');
      expect(nextRun.hour, equals(2));
    });
  });
}
```

## Implementation Priority

1. **High Priority**
   - Process pipelines (Laravel compatibility)
   - Process scheduling (Laravel compatibility)
   - Process monitoring

2. **Medium Priority**
   - Process groups
   - Process isolation
   - Process recovery

3. **Low Priority**
   - Additional integration features
   - Additional monitoring features
   - Performance optimizations

## Next Steps

1. **Implementation Tasks**
   - Add process pipelines
   - Add process scheduling
   - Add process monitoring
   - Add process groups

2. **Documentation Tasks**
   - Document pipelines
   - Document scheduling
   - Document monitoring
   - Add integration examples

3. **Testing Tasks**
   - Add pipeline tests
   - Add scheduling tests
   - Add monitoring tests
   - Add group tests

## Development Guidelines

### 1. Getting Started
Before implementing process 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 [Process Package Specification](process_package_specification.md)
6. Review [Events Package Specification](events_package_specification.md)
7. Review [Queue Package Specification](queue_package_specification.md)

### 2. Implementation Process
For each process 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 [Process Package Specification](process_package_specification.md)

### 4. Integration Considerations
When implementing process 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
Process system must:
1. Handle concurrent processes efficiently
2. Manage system resources
3. Support process pooling
4. Scale with process count
5. Meet performance targets in [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md#performance-benchmarks)

### 6. Testing Requirements
Process tests must:
1. Cover all process operations
2. Test concurrent execution
3. Verify event handling
4. Check resource cleanup
5. Follow patterns in [Testing Guide](testing_guide.md)

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