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https://github.com/cpvalente/ontime.git
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Carlos Valente
41 lines
1.1 KiB
TypeScript
41 lines
1.1 KiB
TypeScript
import { dayInMs } from './conversionUtils.js';
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/**
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* Utility function checks whether a given event is the day after from its predecessor
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* We consider an event to be the day after, if it begins before the start of the previous
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* @example day after
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* 09:00 - 10:00
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* 08:00 - 10:30
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* @example day after
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* 23:00 - 00:00
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* 02:00 - 03:00
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* @example same day
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* 09:00 - 10:00
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* 09:30 - 10:30
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* @example same day, but previous crosses midnight
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* 23:00 - 01:00
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* 02:00 - 03:00
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* @example same day, but previous crosses midnight (with overlap)
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* 22:00 - 02:00
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* 01:00 - 03:00
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*/
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export function checkIsNextDay(previousStart: number, timeStart: number, previousDuration: number): boolean {
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if (previousDuration === 0) {
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return false;
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}
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if (timeStart <= previousStart) {
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const normalisedPreviousEnd = previousStart + previousDuration;
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if (normalisedPreviousEnd === dayInMs) {
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return true;
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}
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// handle exception for an event that finishes exactly at midnight
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if (normalisedPreviousEnd > dayInMs) {
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return false;
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}
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return true;
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}
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return false;
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}
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