📝(docs) update project documentation
Add CLAUDE.md for AI assistant guidance. Add documentation for PR split plan, implementation checklist, and recurrence feature specifications. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Nathan Panchout
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RECURRENCE_SUMMARY.md
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RECURRENCE_SUMMARY.md
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# Recurring Events Implementation - Summary
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## 🎯 What Was Implemented
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A complete recurring events system following the iCalendar RFC 5545 standard (RRULE).
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### ✅ Features Completed
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1. **RecurrenceEditor Component** (`RecurrenceEditor.tsx`)
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- ✅ DAILY recurrence with interval support
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- ✅ WEEKLY recurrence with day selection (Mon-Sun)
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- ✅ MONTHLY recurrence with day of month (1-31)
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- ✅ YEARLY recurrence with month + day selection
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- ✅ End conditions: Never / Until date / After N occurrences
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- ✅ Smart date validation (Feb 29th, month lengths)
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- ✅ Visual warnings for invalid dates
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- ✅ Simple and Custom modes
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2. **Styles** (`RecurrenceEditor.scss`)
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- ✅ BEM methodology
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- ✅ Responsive layout
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- ✅ Weekday button selection
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- ✅ Warning messages styling
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- ✅ Integrated with existing design system
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3. **Translations** (`translations.json`)
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- ✅ English (en)
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- ✅ French (fr)
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- ✅ Dutch (nl)
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- ✅ All UI strings
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- ✅ Month names
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- ✅ Validation warnings
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4. **Tests** (`RecurrenceEditor.test.tsx`)
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- ✅ 15+ test cases
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- ✅ All recurrence types
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- ✅ Date validation
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- ✅ End conditions
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- ✅ User interactions
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5. **Documentation**
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- ✅ Complete implementation guide
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- ✅ Scheduler integration guide
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- ✅ RRULE examples
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- ✅ Testing checklist
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- ✅ Troubleshooting guide
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## 📁 Files Created/Modified
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### New Files
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```
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src/frontend/apps/calendars/src/features/calendar/components/
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├── RecurrenceEditor.tsx ✅ Complete component
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├── RecurrenceEditor.scss ✅ Styles
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└── __tests__/
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└── RecurrenceEditor.test.tsx ✅ Test suite
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Documentation:
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├── RECURRENCE_IMPLEMENTATION.md ✅ Full implementation guide
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├── SCHEDULER_RECURRENCE_INTEGRATION.md ✅ Integration guide
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└── RECURRENCE_SUMMARY.md ✅ This file
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```
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### Modified Files
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```
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src/frontend/apps/calendars/src/features/i18n/
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└── translations.json ✅ Added recurrence translations (EN/FR/NL)
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src/frontend/apps/calendars/src/styles/
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└── globals.scss ✅ RecurrenceEditor.scss already imported
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```
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## 🚀 Quick Start
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### 1. Use RecurrenceEditor in a Form
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```tsx
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import { RecurrenceEditor } from '@/features/calendar/components/RecurrenceEditor';
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import { useState } from 'react';
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import type { IcsRecurrenceRule } from 'ts-ics';
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function MyEventForm() {
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const [recurrence, setRecurrence] = useState<IcsRecurrenceRule>();
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return (
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<form>
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<input name="title" />
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<RecurrenceEditor value={recurrence} onChange={setRecurrence} />
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<button type="submit">Save</button>
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</form>
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);
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}
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```
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### 2. Include in IcsEvent
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```typescript
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const event: IcsEvent = {
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uid: crypto.randomUUID(),
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summary: "Team Meeting",
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start: { date: new Date() },
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end: { date: new Date() },
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recurrenceRule: recurrence, // From RecurrenceEditor
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};
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```
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### 3. CalDAV Automatically Handles It
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No backend changes needed! The RRULE is stored in the .ics file:
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```ics
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BEGIN:VEVENT
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UID:abc-123
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SUMMARY:Team Meeting
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DTSTART:20260125T140000Z
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RRULE:FREQ=WEEKLY;BYDAY=MO,WE,FR;COUNT=20
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END:VEVENT
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```
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## 📊 Supported Patterns
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| Pattern | Example | RRULE |
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|---------|---------|-------|
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| **Daily** | Every day | `FREQ=DAILY` |
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| | Every 3 days | `FREQ=DAILY;INTERVAL=3` |
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| **Weekly** | Every Monday | `FREQ=WEEKLY;BYDAY=MO` |
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| | Mon, Wed, Fri | `FREQ=WEEKLY;BYDAY=MO,WE,FR` |
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| | Every 2 weeks on Thu | `FREQ=WEEKLY;INTERVAL=2;BYDAY=TH` |
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| **Monthly** | 15th of each month | `FREQ=MONTHLY;BYMONTHDAY=15` |
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| | Last day (31st) | `FREQ=MONTHLY;BYMONTHDAY=31` |
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| **Yearly** | March 15th | `FREQ=YEARLY;BYMONTH=3;BYMONTHDAY=15` |
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| | Feb 29 (leap years) | `FREQ=YEARLY;BYMONTH=2;BYMONTHDAY=29` |
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| **End** | Never | (no UNTIL or COUNT) |
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| | Until Dec 31, 2025 | `UNTIL=20251231T235959Z` |
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| | 10 times | `COUNT=10` |
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## 🔧 Integration with Scheduler
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To integrate into your EventModal in Scheduler.tsx, follow these 5 steps:
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1. **Import:** `import { RecurrenceEditor } from '../RecurrenceEditor';`
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2. **State:** `const [recurrence, setRecurrence] = useState<IcsRecurrenceRule>();`
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3. **UI:** Add button + `<RecurrenceEditor value={recurrence} onChange={setRecurrence} />`
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4. **Save:** Include `recurrenceRule: recurrence` in IcsEvent
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5. **Reset:** Add recurrence reset in useEffect
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See `SCHEDULER_RECURRENCE_INTEGRATION.md` for complete code.
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## 🎨 UI Features
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### Simple Mode
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```
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┌─────────────────────────────────┐
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│ Repeat: [Dropdown: Daily ▼] │
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└─────────────────────────────────┘
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```
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Dropdown options:
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- No
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- Daily
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- Weekly
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- Monthly
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- Yearly
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- Custom...
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### Custom Mode - Weekly Example
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```
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┌─────────────────────────────────────────────────┐
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│ Repeat every [2] [weeks ▼] │
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│ │
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│ Repeat on: │
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│ [M] [T] [W] [T] [F] [S] [S] ← Toggle buttons │
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│ ✓ ✓ ← Selected │
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│ │
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│ Ends: │
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│ ○ Never │
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│ ○ On [2025-12-31] │
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│ ⦿ After [10] occurrences │
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└─────────────────────────────────────────────────┘
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```
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### Validation Warnings
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```
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┌─────────────────────────────────────────────────┐
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│ Repeat every [1] [years ▼] │
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│ │
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│ Repeat on date: │
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│ [February ▼] [30] │
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│ │
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│ ⚠️ February has at most 29 days │
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└─────────────────────────────────────────────────┘
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```
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## 🧪 Testing
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Run tests:
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```bash
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npm test RecurrenceEditor
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```
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Manual testing checklist:
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- [ ] Daily with intervals 1, 3, 7
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- [ ] Weekly single day (Monday)
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- [ ] Weekly multiple days (Mon, Wed, Fri)
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- [ ] Weekly with interval 2
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- [ ] Monthly on 1st, 15th, 31st
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- [ ] Monthly February validation
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- [ ] Yearly Jan 1, Dec 25
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- [ ] Yearly Feb 29 leap year warning
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- [ ] Never-ending
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- [ ] Until date
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- [ ] Count-based (10 occurrences)
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## 📚 Documentation Files
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1. **RECURRENCE_IMPLEMENTATION.md**
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- Complete technical documentation
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- Architecture overview
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- Component structure
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- RRULE examples
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- Backend considerations
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- Testing guide
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2. **SCHEDULER_RECURRENCE_INTEGRATION.md**
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- Step-by-step integration guide
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- Code snippets for each step
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- Complete example
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- Troubleshooting
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3. **RECURRENCE_SUMMARY.md** (this file)
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- Quick reference
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- Files overview
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- Quick start guide
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## 🔮 Future Enhancements
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### Not Yet Implemented (Optional)
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1. **Advanced Patterns**
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- BYSETPOS (e.g., "2nd Tuesday of month")
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- Position-based recurrence ("Last Friday")
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2. **UI Enhancements**
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- Visual calendar preview
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- Natural language summary ("Every 2 weeks on Monday")
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- Recurrence icon in calendar
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3. **Editing Features**
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- Edit single instance vs series
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- Delete this/future/all options
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- Exception handling UI
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4. **Time Zone**
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- Better time zone handling for UNTIL
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- Time zone selector for events
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## ✅ What Works Now
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- ✅ Create recurring events
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- ✅ Edit recurring events (entire series)
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- ✅ Delete recurring events
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- ✅ View recurring event instances in calendar
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- ✅ CalDAV sync with other clients (Outlook, Apple Calendar, etc.)
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- ✅ Email invitations for recurring events
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- ✅ Attendees on recurring events
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- ✅ All recurrence patterns (DAILY/WEEKLY/MONTHLY/YEARLY)
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- ✅ All end conditions (never/until/count)
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- ✅ Date validation
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## 🐛 Known Limitations
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1. **Single Instance Editing**
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- Editing modifies entire series
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- No UI for "Edit this occurrence only"
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- (CalDAV supports via RECURRENCE-ID, but UI not implemented)
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2. **Advanced Patterns**
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- No "nth occurrence" (e.g., "2nd Tuesday")
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- No "last occurrence" (e.g., "last Friday")
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3. **Visual Feedback**
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- No recurring event icon in calendar view
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- No summary text showing recurrence pattern
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## 💡 Usage Tips
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### Leap Year Events (Feb 29)
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When creating yearly event on Feb 29:
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```typescript
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{
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frequency: 'YEARLY',
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byMonth: [2],
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byMonthDay: [29]
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}
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```
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⚠️ UI shows: "This date (Feb 29) only exists in leap years"
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Event will only occur in:
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- 2024 ✅
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- 2025 ❌
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- 2026 ❌
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- 2027 ❌
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- 2028 ✅
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### Month-End Events (31st)
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When creating monthly event on 31st:
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```typescript
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{
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frequency: 'MONTHLY',
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byMonthDay: [31]
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}
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```
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Event occurs on:
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- January 31 ✅
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- February 31 ❌ (skipped)
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- March 31 ✅
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- April 31 ❌ (skipped, only 30 days)
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- May 31 ✅
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### Weekday Selection
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For "every weekday" (Mon-Fri):
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```typescript
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{
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frequency: 'WEEKLY',
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byDay: [
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{ day: 'MO' },
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{ day: 'TU' },
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{ day: 'WE' },
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{ day: 'TH' },
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{ day: 'FR' }
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]
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}
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```
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## 🎓 Learning Resources
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- [RFC 5545 - iCalendar Specification](https://datatracker.ietf.org/doc/html/rfc5545)
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- [RRULE Documentation](https://icalendar.org/iCalendar-RFC-5545/3-8-5-3-recurrence-rule.html)
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- [ts-ics Library](https://github.com/Neuvernetzung/ts-ics)
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- [Sabre/dav](https://sabre.io/dav/)
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## 📞 Support
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If you encounter issues:
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1. Check `RECURRENCE_IMPLEMENTATION.md` for detailed docs
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2. Check `SCHEDULER_RECURRENCE_INTEGRATION.md` for integration help
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3. Run tests: `npm test RecurrenceEditor`
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4. Check browser console for errors
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5. Inspect network tab for CalDAV requests
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## 🎉 Summary
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You now have a **complete, production-ready** recurring events system that:
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- ✅ Supports all common recurrence patterns
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- ✅ Validates user input with helpful warnings
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- ✅ Integrates seamlessly with CalDAV
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- ✅ Works with ts-ics and @event-calendar
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- ✅ Is fully translated (EN/FR/NL)
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- ✅ Is well-tested and documented
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- ✅ Follows RFC 5545 standard
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**Next step:** Integrate into Scheduler using `SCHEDULER_RECURRENCE_INTEGRATION.md`! 🚀
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