49 lines
1.3 KiB
TypeScript
49 lines
1.3 KiB
TypeScript
import { ApplicationController } from './application_controller';
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const DATE_PLACEHOLDER_REGEXP = /[jJmMdD]{2}\/[jJmMdD]{2}\/[aAyY]{4}/;
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const DATE_EXAMPLE_REGEXP = /\d{1,2}\/\d{1,2}\/\d{4}/;
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const PARTS = {
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fr: {
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'15': 'JJ',
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'10': 'MM',
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'2022': 'AAAA'
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},
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en: {
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'15': 'dd',
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'10': 'mm',
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'2022': 'yyyy'
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}
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};
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export class DateInputHintController extends ApplicationController {
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connect() {
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this.fixDateFormat(this.element);
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}
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private fixDateFormat(input: Element) {
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const text = input.textContent ?? '';
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const match = text.match(DATE_PLACEHOLDER_REGEXP);
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if (match) {
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const [placeholder, example] = this.translatePlaceholder();
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// This component behaviour can be had to test and debug. We keep a (debug) log here to help.
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console.debug(`Replace ${match[0]} with ${placeholder} and ${example}`);
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input.textContent = text
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.replace(DATE_PLACEHOLDER_REGEXP, placeholder)
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.replace(DATE_EXAMPLE_REGEXP, example);
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}
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}
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private translatePlaceholder() {
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const locale = document.documentElement.lang as 'fr' | 'en';
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const parts = PARTS[locale] ?? PARTS.fr;
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const example = new Date(2022, 9, 15).toLocaleDateString();
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return [
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Object.entries(parts).reduce(
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(text, [part, str]) => text.replace(part, str),
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example
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),
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example
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];
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}
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}
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