gitea/web_src/js/webcomponents/absolute-date.ts

40 lines
1.7 KiB
TypeScript

export function toAbsoluteLocaleDate(date: string, lang?: string, opts?: Intl.DateTimeFormatOptions) {
// only use the date part, it is guaranteed to be in ISO format (YYYY-MM-DDTHH:mm:ss.sssZ) or (YYYY-MM-DD)
// if there is an "Invalid Date" error, there must be something wrong in code and should be fixed.
// TODO: there is a root problem in backend code: the date "YYYY-MM-DD" is passed to backend without timezone (eg: deadline),
// then backend parses it in server's timezone and stores the parsed timestamp into database.
// If the user's timezone is different from the server's, the date might be displayed in the wrong day.
const dateSep = date.indexOf('T');
date = dateSep === -1 ? date : date.substring(0, dateSep);
return new Date(`${date}T00:00:00`).toLocaleString(lang || [], opts);
}
window.customElements.define('absolute-date', class extends HTMLElement {
static observedAttributes = ['date', 'year', 'month', 'weekday', 'day'];
initialized = false;
update = () => {
const opt: Intl.DateTimeFormatOptions = {};
for (const attr of ['year', 'month', 'weekday', 'day']) {
if (this.getAttribute(attr)) opt[attr] = this.getAttribute(attr);
}
const lang = this.closest('[lang]')?.getAttribute('lang') ||
this.ownerDocument.documentElement.getAttribute('lang') || '';
if (!this.shadowRoot) this.attachShadow({mode: 'open'});
this.shadowRoot.textContent = toAbsoluteLocaleDate(this.getAttribute('date'), lang, opt);
};
attributeChangedCallback(_name: string, oldValue: string | null, newValue: string | null) {
if (!this.initialized || oldValue === newValue) return;
this.update();
}
connectedCallback() {
this.initialized = false;
this.update();
this.initialized = true;
}
});