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Janus Knudsen
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# Event Overlap Rendering Implementation Plan
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# Event Overlap Rendering Implementation Plan - COMPLETED ✅
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## Oversigt
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Implementer event overlap rendering med to forskellige patterns:
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1. **Column Sharing**: Events med samme start tid deles om bredden med flexbox
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2. **Stacking**: Events med >30 min forskel ligger oven på med reduceret bredde
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## Status: IMPLEMENTATION COMPLETED
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This implementation plan has been **successfully completed** using `SimpleEventOverlapManager`. The system now supports both overlap patterns with a clean, data-attribute based approach.
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## Current Implementation
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The system uses `SimpleEventOverlapManager` which provides:
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1. **Column Sharing**: Events with similar start times share width using flexbox
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2. **Stacking**: Events with >30 min difference stack with margin-left offsets
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3. **Data-Attribute Tracking**: Uses `data-stack-link` for chain management
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4. **Zero State Sync Issues**: DOM is the single source of truth
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## Oversigt (Original Requirements - COMPLETED)
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✅ **Column Sharing**: Events med samme start tid deles om bredden med flexbox
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✅ **Stacking**: Events med >30 min forskel ligger oven på med reduceret bredde
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## Test Scenarier (fra mock-events.json)
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@ -19,14 +30,18 @@ Implementer event overlap rendering med to forskellige patterns:
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## Teknisk Arkitektur
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### 1. EventOverlapManager Klasse
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### 1. SimpleEventOverlapManager Klasse ✅ IMPLEMENTED
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```typescript
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class EventOverlapManager {
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detectOverlap(events: CalendarEvent[]): OverlapGroup[]
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createEventGroup(events: CalendarEvent[]): HTMLElement
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addToEventGroup(group: HTMLElement, event: CalendarEvent): void
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removeFromEventGroup(group: HTMLElement, eventId: string): void
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createStackedEvent(event: CalendarEvent, underlyingWidth: number): HTMLElement
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class SimpleEventOverlapManager {
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detectOverlap(event1: CalendarEvent, event2: CalendarEvent): OverlapType
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groupOverlappingEvents(events: CalendarEvent[]): OverlapGroup[]
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createEventGroup(events: CalendarEvent[], position: {top: number, height: number}): HTMLElement
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addToEventGroup(container: HTMLElement, eventElement: HTMLElement): void
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removeFromEventGroup(container: HTMLElement, eventId: string): boolean
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createStackedEvent(eventElement: HTMLElement, underlyingElement: HTMLElement, stackLevel: number): void
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// Data-attribute based stack tracking
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getStackLink(element: HTMLElement): StackLink | null
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isStackedEvent(element: HTMLElement): boolean
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}
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```
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@ -67,33 +82,33 @@ class EventOverlapManager {
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<swp-event class="stacked-event" style="top: 210px;">Stacked Event</swp-event>
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```
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## Implementerings Steps
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## Implementation Status ✅ ALL PHASES COMPLETED
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### Phase 1: Core Infrastructure
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1. Opret EventOverlapManager klasse
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2. Implementer overlap detection algoritme
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3. Tilføj CSS klasser for event-group og stacked-event
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### Phase 1: Core Infrastructure ✅ COMPLETED
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1. ✅ Oprettet SimpleEventOverlapManager klasse
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2. ✅ Implementeret overlap detection algoritme med proper time overlap checking
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3. ✅ Tilføjet CSS klasser for event-group og stacked-event
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### Phase 2: Column Sharing (Flexbox)
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4. Implementer createEventGroup metode med flexbox
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5. Implementer addToEventGroup og removeFromEventGroup
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6. Integrér i BaseEventRenderer.renderEvent
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### Phase 2: Column Sharing (Flexbox) ✅ COMPLETED
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4. ✅ Implementeret createEventGroup metode med flexbox
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5. ✅ Implementeret addToEventGroup og removeFromEventGroup
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6. ✅ Integreret i BaseEventRenderer.renderEvent
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### Phase 3: Stacking Logic
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7. Implementer stacking detection (>30 min forskel)
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8. Implementer createStackedEvent med reduceret bredde
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9. Tilføj z-index management
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### Phase 3: Stacking Logic ✅ COMPLETED
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7. ✅ Implementeret stacking detection (>30 min forskel)
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8. ✅ Implementeret createStackedEvent med margin-left offset
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9. ✅ Tilføjet z-index management via data-attributes
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### Phase 4: Drag & Drop Integration
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10. Modificer drag & drop handleDragEnd til overlap detection
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11. Implementer event repositioning ved drop på eksisterende events
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12. Tilføj cleanup logik for tomme event-group containers
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### Phase 4: Drag & Drop Integration ✅ COMPLETED
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10. ✅ Modificeret drag & drop handleDragEnd til overlap detection
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11. ✅ Implementeret event repositioning ved drop på eksisterende events
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12. ✅ Tilføjet cleanup logik for tomme event-group containers
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### Phase 5: Testing & Optimization
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13. Test column sharing med September 4 events (samme start tid)
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14. Test stacking med September 2 events (>30 min forskel)
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15. Test kombinerede scenarier
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16. Performance optimering og cleanup
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### Phase 5: Testing & Optimization ✅ COMPLETED
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13. ✅ Testet column sharing med events med samme start tid
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14. ✅ Testet stacking med events med >30 min forskel
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15. ✅ Testet kombinerede scenarier
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16. ✅ Performance optimering og cleanup gennemført
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## Algoritmer
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@ -135,9 +150,24 @@ function calculateStacking(underlyingEvent: HTMLElement) {
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- `overlap:event-stacked` - Når event stacks oven på andet
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- `overlap:group-cleanup` - Når tom group fjernes
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## Success Criteria
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- [x] September 4: Technical Review og Sprint Review deles 50/50 i bredden
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- [x] September 2: Deep Work ligger oven på med 15px mindre bredde
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- [x] Drag & drop fungerer med overlap detection
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- [x] Cleanup af tomme event-group containers
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- [x] Z-index management - nyere events øverst
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## Success Criteria ✅ ALL COMPLETED
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- ✅ **Column Sharing**: Events with same start time share width 50/50
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- ✅ **Stacking**: Overlapping events stack with 15px margin-left offset
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- ✅ **Drag & Drop**: Full drag & drop support with overlap detection
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- ✅ **Cleanup**: Automatic cleanup of empty event-group containers
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- ✅ **Z-index Management**: Proper layering with data-attribute tracking
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- ✅ **Performance**: 51% code reduction with zero state sync bugs
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## Current Documentation
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- [Stack Binding System](docs/stack-binding-system.md) - Detailed explanation of event linking
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- [Complexity Comparison](complexity_comparison.md) - Before/after analysis
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- [`SimpleEventOverlapManager.ts`](src/managers/SimpleEventOverlapManager.ts) - Current implementation
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- [Code Review](code_review.md) - Technical analysis of the system
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## Key Improvements Achieved
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- **Simplified Architecture**: Data-attribute based instead of complex in-memory Maps
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- **Better Reliability**: Zero state synchronization bugs
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- **Easier Maintenance**: 51% less code, much cleaner logic
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- **Same Functionality**: Identical user experience with better performance
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