Flutter Code Review

Code Review Skill

7 Criteria

1. Functionality (🔴 Blocker)

• Logic errors, missing error handling, null safety violations

2. Readability (🟠 Major)

• Clear naming, proper comments, no dead code

3. Optimization (🟠 Major)

• Unnecessary rebuilds, N+1 queries, missing const

4. Architecture (🟠 Major)

• data/domain/view pattern, repository pattern, @injectable DI

5. Design System (🟠 Major)

• ColorPalette, Spacing, Project Design System Widgets (no hardcoded)

6. Linting (🔴 Blocker)

• flutter analyze must pass (zero errors)

7. Testing (Optional)

• 90%+ unit, 50%+ widget coverage (suggest, don't block)

Quick Checks

// ❌ Hardcoded color
Text('Hi', style: TextStyle(color: Colors.red))

// ✅ Use ColorPalette
Text('Hi', style: TextStyle(
  color: ColorPalette.coloursBasicText.platformBrightnessColor(context),
))

// ❌ Business logic in widget
final total = items.fold(0, (s, i) => s + i.price);

// ✅ Logic in Bloc/Cubit
@injectable class MyBloc { ... }

// ❌ No error handling
Future<Data> fetch() async {
  return await api.call();
}

// ✅ Try-catch
Future<Data> fetch() async {
  try {
    return await api.call();
  } catch (e) {
    throw NetworkException(e.toString());
  }
}

Severity

• 🔴 Blocker: Must fix (functionality, security, linting)
• 🟠 Major: Should fix (performance, architecture, design system)
• 🟢 Minor: Nice to fix (naming, comments)

Process

1. flutter analyze (must pass)
2. Check file structure (data/domain/view)
3. Verify design system usage
4. Check state management (@injectable)
5. Verify error handling
6. Check tests (suggest improvements)