Senior-Level Improvements¶

1. Architecture & State Management¶

Global State Management¶

Replace Context API with Redux Toolkit or Zustand
Gain: Better state management, dev tools, middleware support
Example: Move cart state to Redux with proper slices and actions

// Example Redux slice for cart
const cartSlice = createSlice({
  name: 'cart',
  initialState,
  reducers: {
    addToCart: (state, action) => {
      // Immutable state updates with Redux Toolkit
    },
    removeFromCart: (state, action) => {
      // Automatic handling of immutability
    }
  }
});

Service Layer¶

API Abstraction
Gain: Better separation of concerns, easier testing and maintenance
Example: Create dedicated service classes for API operations

class ProductService {
  private api: ApiClient;

  async getProducts(filters: ProductFilters): Promise<Product[]> {
    // Centralized error handling and response mapping
  }
}

2. Performance Optimizations¶

Code Splitting¶

Dynamic Imports
Gain: Smaller initial bundle size, faster page loads
Example: Lazy load product filters on mobile

const ProductFilters = dynamic(() => import('./ProductFilters'), {
  loading: () => <FiltersSkeleton />,
  ssr: false
});

Caching Strategy¶

Apollo Client Caching
Gain: Faster data access, reduced server load
Example: Implement field-level caching policies

const cache = new InMemoryCache({
  typePolicies: {
    Product: {
      fields: {
        price: {
          read(price) {
            // Custom cache reading logic
          }
        }
      }
    }
  }
});

3. Testing & Quality Assurance¶

Unit Testing¶

Jest/React Testing Library
Gain: Catch bugs early, ensure component behavior
Example: Test hooks like useProductFilters in isolation

describe('useProductFilters', () => {
  it('should filter products by price range', () => {
    const { result } = renderHook(() => useProductFilters());
    act(() => {
      result.current.setPriceRange([10, 50]);
    });
    expect(result.current.filterProducts(mockProducts)).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ price: expect.any(Number) })
      ])
    );
  });
});

E2E Testing¶

Expand Playwright Tests
Gain: Ensure critical user flows work end-to-end
Example: Add comprehensive checkout flow testing

test('complete checkout process', async ({ page }) => {
  await page.goto('/');
  await page.click('[data-testid="product-card"]');
  await page.click('[data-testid="add-to-cart"]');
  // Test entire checkout flow
});

4. WooCommerce Integration Enhancements¶

Session Management¶

Improve WooCommerce Session Handling
Gain: Better cart persistence, reduced errors
Example: Enhanced session token management

// Enhanced WooCommerce session middleware
const enhancedMiddleware = new ApolloLink((operation, forward) => {
  const session = getWooSession();
  if (session && !isExpired(session)) {
    operation.setContext({
      headers: {
        'woocommerce-session': `Session ${session.token}`
      }
    });
  }
  return forward(operation);
});

Cart Improvements¶

Enhanced Cart Features
Gain: Better user experience with cart functionality
Example: Add cart total, copy billing address to shipping

5. Developer Experience¶

Documentation¶

Storybook Integration
Gain: Better component documentation, easier UI development
Example: Document all variants of ProductCard

// ProductCard.stories.tsx
export const WithDiscount = {
  args: {
    product: {
      name: 'Test Product',
      price: '100',
      salePrice: '80',
      onSale: true
    }
  }
};

TypeScript Improvements¶

Stricter Configuration
Gain: Catch more bugs at compile time
Example: Enable strict mode, add proper generics

// tsconfig.json improvements
{
  "compilerOptions": {
    "strict": true,
    "noUncheckedIndexedAccess": true,
    "exactOptionalPropertyTypes": true
  }
}

6. Monitoring & Analytics¶

Error Tracking¶

Sentry Integration
Gain: Better error tracking, faster bug fixing
Example: Add proper error boundaries with Sentry

class ErrorBoundary extends React.Component {
  componentDidCatch(error, errorInfo) {
    Sentry.captureException(error, { extra: errorInfo });
  }
}

Performance Monitoring¶

Core Web Vitals
Gain: Track and improve user experience metrics
Example: Implement proper performance monitoring

7. Code Quality & Maintainability¶

Design Patterns¶

Implement Factory Pattern
Gain: Better code organization, easier maintenance
Example: Create product factory for different types

class ProductFactory {
  createProduct(type: ProductType, data: ProductData): Product {
    switch (type) {
      case 'simple':
        return new SimpleProduct(data);
      case 'variable':
        return new VariableProduct(data);
      default:
        throw new Error(`Unknown product type: ${type}`);
    }
  }
}

Code Organization¶

Feature-based Structure
Gain: Better code organization, easier navigation
Example: Reorganize code by feature instead of type

src/
  features/
    products/
      components/
      hooks/
      services/
      types/
    cart/
      components/
      hooks/
      services/
      types/

Implementation Priority Matrix¶

High Impact, Low Effort (Do First)¶

TypeScript Strict Mode
Simply update tsconfig.json
Immediate impact on code quality
Catches type-related bugs early
Lighthouse Score Improvements
Already have CI integration
Focus on performance metrics
Quick accessibility wins
Cart Total Implementation
Listed in TODO
High user impact
Relatively simple change

High Impact, High Effort (Plan Carefully)¶

State Management Refactor
Requires significant refactoring
Major architectural improvement
Plan and implement in phases
Feature-based Code Reorganization
Substantial restructuring needed
Improves long-term maintainability
Requires team coordination

Low Impact, Low Effort (Quick Wins)¶

Storybook Documentation
Can be added gradually
Improves developer experience
Start with key components
Performance Monitoring
Easy integration with existing tools
Provides valuable insights
Quick setup process

Low Impact, High Effort (Consider Later)¶

Expand Test Coverage
Build upon existing Playwright E2E tests
Already have basic homepage tests
Focus on:
- WooCommerce integration tests
- Cart/checkout flows
- Variable product handling
- Stock status updates
User Registration & Dashboard
Listed in TODO
Requires careful WooCommerce integration
Consider after core improvements

Implementation Strategy¶

Week 1-2: Quick Wins
Enable TypeScript strict mode
Add error boundaries
Optimize Apollo cache
Estimated effort: 3-4 days
Immediate quality improvements
Week 3-4: Foundation Building
Begin Storybook documentation
Set up performance monitoring
Expand existing E2E tests with:
- Cart manipulation scenarios
- Checkout flow validation
- Error state handling
Estimated effort: 5-7 days
Builds upon existing test infrastructure
Month 2: Major Improvements
Implement user registration flow
Add cart improvements from TODO list
Enhance WooCommerce session handling
Estimated effort: 3-4 weeks
Focus on core user experience

This prioritization ensures: - Quick delivery of high-impact improvements - Minimal disruption to ongoing development - Measurable progress at each stage - Efficient use of development resources