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Frontend Documentation

Architecture and Implementation

The frontend application follows a component-based architecture using React with TypeScript. The application is structured around the following key concepts:

Component Organization

  • Components are organized by feature and function (e.g., /components/courses/detail/tabs/)
  • Common UI elements are separated into reusable components
  • Dialog components are organized in a dedicated dialogs directory

State Management

  • Custom hooks for different domains (e.g., useCourseStore, useCourseDialogs, useCourseOperations)
  • Each hook follows the Single Responsibility Principle, handling one aspect of application state
  • API calls are abstracted within service modules

Type Safety

  • TypeScript interfaces for all domain objects
  • Type mapping functions to handle API response transformations
  • Nullable fields are properly handled with fallbacks (e.g., description || "")
  • Unified type definitions in dedicated files (e.g., CourseTypes.ts)
  • Type mapping utilities at API boundaries only

UI Components

  • Material-UI based component library
  • Consistent layout and styling patterns
  • Loading states and error handling

Key Design Decisions

Custom Hooks Pattern

  • What: Domain logic is encapsulated in custom hooks like useCourseStore
  • Why: Separates UI from business logic, improves testability and reusability
  • Example: useCourseOperations manages course deletion with cleanup logic

Type Mapping

  • What: Explicit mapping between API responses and frontend models
  • Why: Ensures frontend has consistent data regardless of API structure changes
  • Example: courseMappers.toUiModel in CourseTypes.ts handles different field names
  • Benefit: Only one place to update when API changes, consistent property names throughout the application

Component Composition

  • What: Complex screens composed of smaller, focused components
  • Why: Improves maintainability and enables component reuse
  • Example: CourseDetail delegates to MaterialsTab, TasksTab, etc.

Dialog Management

  • What: Centralized dialog state management in useCourseDialogs
  • Why: Provides consistent dialog behavior across the application
  • Example: CourseEditDialog integrates with this system

Areas for Improvement

Global State Management

  • Current approach uses multiple hooks for state
  • Consider adopting a more structured state management solution (Redux, Zustand, Context API)
  • Would improve handling of shared state across components

API Error Handling

  • Error handling is inconsistent across different service calls
  • Implement standardized error handling with user-friendly messages
  • Consider a global error boundary

Type Consistency ✓ Improved

  • Multiple definitions of the same entity (e.g., Course, Assignment)
  • Unify type definitions to reduce type mapping overhead
  • Consider using code generation from API schema
  • Unified type system implemented with clear separation between UI and API models
  • Type mapping utilities handle transformations at API boundaries
  • Standardized property naming across the application

Performance Optimization

  • Add pagination for lists of items (materials, assignments)
  • Implement caching for frequently accessed data
  • Use virtualization for long lists

Form Handling

  • Inconsistent form validation strategies
  • Consider adopting a form library like Formik or React Hook Form
  • Standardize validation error presentation