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refactor(utils): consolidate date utilities into \$lib/utils/date.ts

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Move isoToGerman and germanToIso from utils.ts into utils/date.ts alongside
formatDate, and add handleGermanDateInput for the shared date field handler.
Make utils.ts a re-export shim so existing imports continue to work.

Closes part of #75

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Marcel
2026-03-26 12:07:46 +01:00
parent 1ea84e4dc8
commit d40d4b21e1
2 changed files with 42 additions and 20 deletions
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21
frontend/src/lib/utils.ts
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@@ -1,20 +1 @@
/**
* Converts an ISO date string (YYYY-MM-DD) to German display format (DD.MM.YYYY).
* Returns an empty string for invalid or empty input.
*/
export function isoToGerman(iso: string): string {
if (!iso || !/^\d{4}-\d{2}-\d{2}$/.test(iso)) return '';
const [y, m, d] = iso.split('-');
return `${d}.${m}.${y}`;
}
/**
* Converts a German date string (DD.MM.YYYY) to ISO format (YYYY-MM-DD).
* Returns an empty string for invalid or empty input.
*/
export function germanToIso(german: string): string {
const match = german.match(/^(\d{2})\.(\d{2})\.(\d{4})$/);
if (!match) return '';
const [, d, m, y] = match;
return `${y}-${m}-${d}`;
}
export { isoToGerman, germanToIso } from '$lib/utils/date';