75 lines
2.5 KiB
TypeScript
75 lines
2.5 KiB
TypeScript
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/**
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* OverlapDetector - Ren tidbaseret overlap detection
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* Ingen DOM manipulation, kun tidsberegninger
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*/
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import { CalendarEvent } from '../types/CalendarTypes';
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// Branded type for event IDs
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export type EventId = string & { readonly __brand: 'EventId' };
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export type OverlapResult = {
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overlappingEvents: CalendarEvent[];
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stackLinks: Map<EventId, StackLink>;
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};
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export interface StackLink {
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prev?: EventId; // Event ID of previous event in stack
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next?: EventId; // Event ID of next event in stack
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stackLevel: number; // 0 = base event, 1 = first stacked, etc
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}
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export class OverlapDetector {
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/**
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* Resolver hvilke events et givent event overlapper med i en kolonne
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* @param event - CalendarEvent der skal checkes for overlap
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* @param columnEvents - Array af CalendarEvent objekter i kolonnen
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* @returns Array af events som det givne event overlapper med
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*/
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public resolveOverlap(event: CalendarEvent, columnEvents: CalendarEvent[]): CalendarEvent[] {
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return columnEvents.filter(existingEvent => {
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// To events overlapper hvis:
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// event starter før existing slutter OG
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// event slutter efter existing starter
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return event.start < existingEvent.end && event.end > existingEvent.start;
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});
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}
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/**
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* Dekorerer events med stack linking data
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* @param newEvent - Det nye event der skal tilføjes
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* @param overlappingEvents - Events som det nye event overlapper med
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* @returns OverlapResult med overlappende events og stack links
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*/
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public decorateWithStackLinks(newEvent: CalendarEvent, overlappingEvents: CalendarEvent[]): OverlapResult {
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const stackLinks = new Map<EventId, StackLink>();
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if (overlappingEvents.length === 0) {
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return {
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overlappingEvents: [],
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stackLinks
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};
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}
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// Kombiner nyt event med eksisterende og sortér efter start tid (tidligste første)
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const allEvents = [...overlappingEvents, newEvent].sort((a, b) =>
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a.start.getTime() - b.start.getTime()
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);
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// Opret sammenhængende kæde - alle events bindes sammen
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allEvents.forEach((event, index) => {
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const stackLink: StackLink = {
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stackLevel: index,
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prev: index > 0 ? allEvents[index - 1].id as EventId : undefined,
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next: index < allEvents.length - 1 ? allEvents[index + 1].id as EventId : undefined
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};
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stackLinks.set(event.id as EventId, stackLink);
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});
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return {
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overlappingEvents,
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stackLinks
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};
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}
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}
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