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extract baseUnitId in datetime.ts

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addToDate and isCalendarUnit both inlined the same prefix-stripping
expression.
This commit is contained in:
Horizontal42 2026-08-12 20:07:31 +03:00
parent 744d6b61d5
commit d4c34bf4af
1 changed files with 7 additions and 2 deletions
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9
src/engine/datetime.ts
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@ -105,8 +105,13 @@ export function startOfToday(): number {
* survives DST transitions; months/years clamp to the end of the target
* month (Jan 31 + 1 month = Feb 28, not Mar 3).
*/
/** Strips a prefixed unit id ("milli:second") down to its base ("second"). */
function baseUnitId(unitId: string): string {
return unitId.includes(":") ? unitId.split(":")[1] : unitId;
}
export function addToDate(ms: number, amount: number, unitId: string): number {
const baseId = unitId.includes(":") ? unitId.split(":")[1] : unitId;
const baseId = baseUnitId(unitId);
const d = new Date(ms);
if ((baseId === "day" || baseId === "week") && Number.isInteger(amount)) {
d.setDate(d.getDate() + amount * (baseId === "week" ? 7 : 1));
@ -134,6 +139,6 @@ function lastDayOfMonth(d: Date): number {
}
export function isCalendarUnit(unitId: string, amount: number): boolean {
const baseId = unitId.includes(":") ? unitId.split(":")[1] : unitId;
const baseId = baseUnitId(unitId);
return (baseId === "day" || baseId === "week" || baseId === "month" || baseId === "year") && Number.isInteger(amount);
}