Feature/form validation

[Unclebaffa]

Detailed Implementation Report: Client-Side Form Validation

1. Executive Summary

We have implemented comprehensive client-side form validation for the Login and Register forms in SkillSync. Built using react-hook-form and zod, the implementation delivers real-time validation, a live 4-stage password strength indicator, accessible aria-describedby error announcements, disabled submit controls for invalid form states, and unit test coverage.

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2. Core Features Implemented

A. Centralised Zod Validation Schemas (lib/validations/auth.ts)

• loginSchema:
  • email: Required field validation + RFC 5322 email format validation.
  • password: Required field validation.
• registerSchema:
  • name: Required full name (1 to 80 characters).
  • email: Required email format validation.
  • password: Length validation (8 to 128 characters).
  • confirmPassword: Validated via .superRefine() to ensure exact match with password.
• getPasswordStrength(password):
  • Evaluates 4 rules: length ≥ 8, contains digits 0-9, contains lowercase a-z, contains uppercase/symbols.
  • Returns numerical score (0 to 4), level identifier (empty, weak, fair, good, strong), and boolean flags for each criteria.

B. Accessible Form Field Wrapper (components/auth/FormField.tsx)

• Encapsulates <label>, the input control, error alert text, and optional field hints.
• Uses React’s useId() hook to link inputs to labels and error text.
• Generates aria-describedby={${id}-error} dynamically when errors occur so screen readers announce validation errors.
• Sets aria-invalid={hasError} on the input element.
• Dynamically applies red border styling (border-red-400 focus:ring-red-300) on validation failure.

C. Live Password Strength Meter (components/auth/PasswordStrengthMeter.tsx)

• Renders a 4-bar progress meter that changes colour based on complexity score:
  • Score 1 (weak): Red (bg-red-500)
  • Score 2 (fair): Amber (bg-amber-400)
  • Score 3 (good): Yellow (bg-yellow-400)
  • Score 4 (strong): Emerald (bg-emerald-500)
• Renders a checklist indicating requirement completion:
  • 8+ characters
  • Number (0–9)
  • Lowercase (a–z)
  • Uppercase or symbol

D. Refactored Form Components

1. components/auth/LoginForm.tsx

• Validated via loginSchema with onTouched validation mode.
• Submit button disabled when form is invalid (!isValid), submitting (isSubmitting), or loading (isLoading).
• Displays animated SVG spinner when submission is in progress.
• Single top-level API error alert banner.

2. components/auth/RegisterForm.tsx

• Validated via registerSchema.
• Displays real-time <PasswordStrengthMeter value={watch("password")} />.
• Strips confirmPassword from registration payload before calling registerUser({ name, email, password }).
• Submit button disabled until all fields (including password match) pass validation.

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3. Testing & Code Quality Metrics

Unit Tests Created:

1. __tests__/auth/LoginForm.test.tsx (16 Tests)

   • Form controls rendering
   • Initial disabled submit state
   • noValidate HTML5 attribute presence
   • "Email is required" on empty touch
   • "Enter a valid email address" on malformed email
   • "Password is required" on empty password touch
   • Submit button enabling when email and password are valid
   • Correct payload invocation on submit
   • Router navigation to /dashboard
   • API error rendering from AuthContext
   • Loading spinner state
   • aria-invalid and aria-describedby linking

2. __tests__/auth/RegisterForm.test.tsx (18 Tests)

   • All 4 input fields rendering (Name, Email, Password, Confirm Password)
   • Initial disabled submit state
   • "Full name is required" validation
   • "Password must be at least 8 characters" validation
   • "Passwords don't match" validation on confirm password field
   • Dynamic strength meter rendering
   • "Strong" evaluation for complex passwords
   • Submit button enabling when all 4 fields pass
   • Exclusion of confirmPassword from register() call
   • Router navigation to /dashboard

Verification Summary:

• Jest Test Suite: 187 / 187 tests passed (17 test suites)
• TypeScript: npx tsc --noEmit — 0 errors
• ESLint: npm run lint — 0 errors
• Prettier: 100% formatted

Closes #613

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[nafiuishaaq]

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[Unclebaffa]

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Conflict resolved