tt-booking/docs/IRISH_LOCALIZATION_COMPLETE.md

🇮🇪 Irish Localization Implementation Complete

Overview

Successfully implemented Irish localization for the table tennis booking app, with Monday as the first day of the week and Irish (en-IE) date formatting throughout.

Key Changes Made

1. Utility Functions (lib/utils.ts)

• Updated getWeekDays(): Now returns Monday-Sunday order with proper JS day values
• Added Irish conversion functions:
  • getIrishDayOfWeek(): Converts JS getDay() (0=Sunday) to Irish standard (0=Monday)
  • getJavaScriptDayOfWeek(): Converts Irish day index back to JS getDay() format
  • getIrishDayName(): Gets day name using Irish week start
• Updated formatDate(): Changed from 'en-US' to 'en-IE' locale

2. Admin Time Slot Management (components/admin/AdminTimeSlotManagement.tsx)

• Irish week order: Days now display Monday through Sunday
• Updated constants: IRISH_DAY_ORDER = [1, 2, 3, 4, 5, 6, 0] for correct mapping
• Form defaults: New time slots default to Monday (dayOfWeek: 1)
• Display logic: Correctly maps JS day values to Irish display order
• Dropdown options: Time slot creation shows days in Irish order

3. Calendar UI Component (components/ui/calendar.tsx)

• Added weekStartsOn={1}: Calendar widget now starts with Monday
• Updated locale: Changed month formatting to 'en-IE'
• Data attributes: Updated to use Irish locale for consistency

4. Enhanced Booking Calendar (components/booking/enhanced-booking-calendar.tsx)

• Date formatting: All toLocaleDateString() calls updated to 'en-IE'
• Consistent display: Weekday abbreviations and full date formats use Irish locale
• Time slot logic: Maintains compatibility with JS day values in database

5. All Other Components

Updated locale formatting in:

• components/dashboard/BookingCalendar.tsx
• components/user/user-profile.tsx
• components/notifications/announcements.tsx
• components/admin/AdminUserManagement.tsx
• components/admin/AdminAnnouncementManagement.tsx
• components/admin/AdminCourtManagement.tsx

6. API Compatibility Fix

• Fixed Next.js 15 async params: Updated time-slots/[id]/route.ts to properly handle async params

Database Compatibility

• No database changes needed: Database still stores JavaScript's getDay() values (0=Sunday, 6=Saturday)
• Mapping handled in UI: All conversion between JS day values and Irish display order handled in frontend
• Backward compatibility: Existing time slots and bookings work seamlessly

Technical Implementation

Day Mapping Logic

// JavaScript getDay() values remain in database:
// 0=Sunday, 1=Monday, 2=Tuesday, 3=Wednesday, 4=Thursday, 5=Friday, 6=Saturday

// Irish display order (Monday first):
const IRISH_DAY_ORDER = [1, 2, 3, 4, 5, 6, 0]; // Maps to Monday-Sunday

// Admin panel shows: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
// But stores as:      1,      2,       3,         4,        5,      6,        0

Locale Settings

• Calendar: Starts with Monday (weekStartsOn={1})
• Date Format: Irish format (DD/MM/YYYY pattern via en-IE)
• Time Format: Maintained 24-hour format as requested
• Day Names: All components use Irish week order for display

User Impact

1. Admin Interface: Time slot management shows Monday first, making it intuitive for Irish users
2. Booking Calendar: Date selection and display follow Irish conventions
3. Date Display: All dates throughout the app use Irish formatting (en-IE)
4. Week View: Calendar widgets start with Monday as expected in Ireland

Testing Verification

• ✅ Created test script (scripts/test-irish-localization.js) to verify settings
• ✅ Confirmed day mapping logic works correctly
• ✅ Verified Irish date formatting across all components
• ✅ Time slot management displays in correct order
• ✅ Calendar widgets start with Monday

Benefits

• Cultural Alignment: Follows Irish/European convention of Monday as week start
• User Experience: More intuitive for Irish users
• Consistency: All date formatting uses Irish locale
• Maintainable: Clean separation between database storage and display logic
• No Breaking Changes: Existing bookings and time slots continue to work

Future Considerations

• Could extend to full internationalization (i18n) if needed for other locales
• Day conversion utilities are ready for reuse across the application
• Database schema remains flexible for any future locale changes