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Calendarr/frontend/js/calendar.js

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JavaScript
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import { api } from './api.js';
import { applyTheme, isToday, isSameDay, toLocalDatetimeInput, toDateInput, dateKey } from './utils.js';
import { renderMonth } from './views/month.js';
import { renderWeek } from './views/week.js';
import { renderAgenda } from './views/agenda.js';
const MONTHS = ['Januar','Februar','März','April','Mai','Juni',
'Juli','August','September','Oktober','November','Dezember'];
let state = {
currentDate: new Date(),
currentView: 'month',
events: [],
accounts: [],
settings: {},
dimPast: false,
editingEvent: null, // null = new event
selectedEventColor: '', // '' = use calendar color
};
// ── Public init ───────────────────────────────────────────
export async function initCalendar() {
const [settings, accounts] = await Promise.all([
api.get('/settings/'),
api.get('/caldav/accounts'),
]);
state.settings = settings;
state.accounts = accounts;
state.currentView = settings.default_view || 'month';
state.dimPast = settings.dim_past_events;
applyTheme(settings);
updateViewButtons();
renderCalendarList();
renderMiniCal();
await fetchAndRender();
bindTopbar();
bindSidebar();
bindEventModal();
bindAccountModal();
bindSettingsModal();
}
// ── Data fetching ─────────────────────────────────────────
async function fetchAndRender() {
const { start, end } = getViewRange();
showLoading();
try {
const events = await api.get(`/caldav/events?start=${start.toISOString()}&end=${end.toISOString()}`);
state.events = events;
} catch (e) {
showToast('Fehler beim Laden der Termine: ' + e.message, true);
state.events = [];
}
renderView();
updateTitle();
renderMiniCal();
}
function getViewRange() {
const d = state.currentDate;
let start, end;
if (state.currentView === 'month') {
start = new Date(d.getFullYear(), d.getMonth(), 1);
start.setDate(start.getDate() - start.getDay() - 1);
end = new Date(d.getFullYear(), d.getMonth() + 1, 0);
end.setDate(end.getDate() + (6 - end.getDay()) + 1);
} else if (state.currentView === 'week') {
start = new Date(d);
start.setDate(d.getDate() - d.getDay());
start.setHours(0, 0, 0, 0);
end = new Date(start);
end.setDate(start.getDate() + 7);
} else if (state.currentView === 'day') {
start = new Date(d);
start.setHours(0, 0, 0, 0);
end = new Date(start);
end.setDate(end.getDate() + 1);
} else { // agenda
start = new Date(d);
start.setHours(0, 0, 0, 0);
end = new Date(start);
end.setDate(end.getDate() + 60);
}
return { start, end };
}
// ── Rendering ─────────────────────────────────────────────
function renderView() {
const container = document.getElementById('view-container');
const evs = filterEvents(state.events);
if (state.currentView === 'month') {
renderMonth(container, state.currentDate, evs,
date => { state.currentDate = date; state.currentView = 'day'; updateViewButtons(); fetchAndRender(); },
showEventPopup
);
} else if (state.currentView === 'week') {
renderWeek(container, state.currentDate, evs,
(date, switchDay) => {
if (switchDay) { state.currentDate = date; state.currentView = 'day'; updateViewButtons(); fetchAndRender(); }
else openNewEventModal(date);
},
showEventPopup
);
} else if (state.currentView === 'day') {
renderWeek(container, state.currentDate, evs,
(date, switchDay) => { if (!switchDay) openNewEventModal(date); },
showEventPopup,
true
);
} else {
renderAgenda(container, state.currentDate, evs, showEventPopup);
}
}
function filterEvents(events) {
// If dimPast is enabled, events are still shown but CSS handles opacity via .past class
return events;
}
function showLoading() {
document.getElementById('view-container').innerHTML =
`<div class="loading-view"><div class="spinner"></div></div>`;
}
function updateTitle() {
const d = state.currentDate;
let title = '';
if (state.currentView === 'month') {
title = `${MONTHS[d.getMonth()]} ${d.getFullYear()}`;
} else if (state.currentView === 'week') {
const sun = new Date(d);
sun.setDate(d.getDate() - d.getDay());
const sat = new Date(sun);
sat.setDate(sun.getDate() + 6);
const sameMonth = sun.getMonth() === sat.getMonth();
title = sameMonth
? `${sun.getDate()}. ${sat.getDate()}. ${MONTHS[sat.getMonth()]} ${sat.getFullYear()}`
: `${sun.getDate()}. ${MONTHS[sun.getMonth()]} ${sat.getDate()}. ${MONTHS[sat.getMonth()]} ${sat.getFullYear()}`;
} else if (state.currentView === 'day') {
title = `${d.getDate()}. ${MONTHS[d.getMonth()]} ${d.getFullYear()}`;
} else {
title = `Ab ${d.getDate()}. ${MONTHS[d.getMonth()]} ${d.getFullYear()}`;
}
document.getElementById('view-title').textContent = title;
}
function updateViewButtons() {
document.querySelectorAll('.view-btn').forEach(btn => {
btn.classList.toggle('active', btn.dataset.view === state.currentView);
});
}
// ── Mini Calendar ─────────────────────────────────────────
function renderMiniCal() {
const d = state.currentDate;
const miniD = new Date(d.getFullYear(), d.getMonth(), 1);
document.getElementById('mini-title').textContent =
`${MONTHS[miniD.getMonth()]} ${miniD.getFullYear()}`;
const firstDay = new Date(miniD.getFullYear(), miniD.getMonth(), 1);
const lastDay = new Date(miniD.getFullYear(), miniD.getMonth() + 1, 0);
const gridStart = new Date(firstDay);
gridStart.setDate(gridStart.getDate() - firstDay.getDay());
// Build event date set
const eventDates = new Set(state.events.map(ev => {
const s = new Date(ev.start);
return `${s.getFullYear()}-${s.getMonth()}-${s.getDate()}`;
}));
const days = [];
const cur = new Date(gridStart);
for (let i = 0; i < 42; i++) {
days.push(new Date(cur));
cur.setDate(cur.getDate() + 1);
}
const html = days.map(day => {
const isOther = day.getMonth() !== miniD.getMonth();
const isToday_ = isToday(day);
const isSelected = isSameDay(day, state.currentDate);
const hasEvs = eventDates.has(`${day.getFullYear()}-${day.getMonth()}-${day.getDate()}`);
const cls = [
'mini-day',
isOther ? 'other-month' : '',
isToday_ ? 'today' : '',
isSelected && !isToday_ ? 'selected' : '',
hasEvs ? 'has-events' : '',
].filter(Boolean).join(' ');
return `<div class="${cls}" data-date="${dayKey(day)}">${day.getDate()}</div>`;
}).join('');
document.getElementById('mini-days').innerHTML = html;
document.querySelectorAll('.mini-day').forEach(el => {
el.addEventListener('click', () => {
state.currentDate = new Date(el.dataset.date + 'T00:00:00');
if (state.currentView === 'agenda' || state.currentView === 'month') {
// Stay in current view but update date
}
fetchAndRender();
});
});
document.getElementById('mini-prev').onclick = () => {
state.currentDate = new Date(state.currentDate.getFullYear(), state.currentDate.getMonth() - 1, 1);
renderMiniCal();
fetchAndRender();
};
document.getElementById('mini-next').onclick = () => {
state.currentDate = new Date(state.currentDate.getFullYear(), state.currentDate.getMonth() + 1, 1);
renderMiniCal();
fetchAndRender();
};
}
// ── Calendar List ─────────────────────────────────────────
function renderCalendarList() {
const container = document.getElementById('cal-list-items');
if (!state.accounts.length) {
container.innerHTML = `<div style="padding:8px 16px;font-size:12px;color:var(--text-3)">Kein CalDAV-Konto</div>`;
return;
}
const html = state.accounts.map(acc =>
`<div class="cal-account-name">${escHtml(acc.name)}</div>` +
acc.calendars.map(cal =>
`<div class="cal-item" data-cal-id="${cal.id}">
<input type="checkbox" ${cal.enabled ? 'checked' : ''} data-cal-id="${cal.id}" />
<div class="cal-item-dot" style="background:${cal.color}"></div>
<span class="cal-item-name">${escHtml(cal.name)}</span>
<button class="icon-btn mini-btn cal-item-remove" data-acc-id="${acc.id}" title="Konto entfernen">
<svg viewBox="0 0 24 24" fill="currentColor" width="14" height="14"><path d="M6 19c0 1.1.9 2 2 2h8c1.1 0 2-.9 2-2V7H6v12zM19 4h-3.5l-1-1h-5l-1 1H5v2h14V4z"/></svg>
</button>
</div>`
).join('')
).join('');
container.innerHTML = html;
container.querySelectorAll('input[type=checkbox]').forEach(cb => {
cb.addEventListener('change', async () => {
const calId = parseInt(cb.dataset.calId);
await api.put(`/caldav/calendars/${calId}`, { enabled: cb.checked });
// Update local state
for (const acc of state.accounts) {
for (const cal of acc.calendars) {
if (cal.id === calId) cal.enabled = cb.checked;
}
}
fetchAndRender();
});
});
container.querySelectorAll('.cal-item-remove').forEach(btn => {
btn.addEventListener('click', async e => {
e.stopPropagation();
if (!confirm('CalDAV-Konto wirklich entfernen?')) return;
const accId = parseInt(btn.dataset.accId);
await api.delete(`/caldav/accounts/${accId}`);
state.accounts = state.accounts.filter(a => a.id !== accId);
renderCalendarList();
fetchAndRender();
});
});
}
// ── Navigation ────────────────────────────────────────────
function navigate(dir) {
const d = state.currentDate;
if (state.currentView === 'month') {
state.currentDate = new Date(d.getFullYear(), d.getMonth() + dir, 1);
} else if (state.currentView === 'week') {
state.currentDate = new Date(d);
state.currentDate.setDate(d.getDate() + dir * 7);
} else if (state.currentView === 'day') {
state.currentDate = new Date(d);
state.currentDate.setDate(d.getDate() + dir);
} else {
state.currentDate = new Date(d);
state.currentDate.setDate(d.getDate() + dir * 30);
}
fetchAndRender();
}
// ── Topbar bindings ───────────────────────────────────────
function bindTopbar() {
document.getElementById('btn-today').onclick = () => {
state.currentDate = new Date();
fetchAndRender();
};
document.getElementById('btn-prev').onclick = () => navigate(-1);
document.getElementById('btn-next').onclick = () => navigate(1);
document.querySelectorAll('.view-btn').forEach(btn => {
btn.addEventListener('click', () => {
state.currentView = btn.dataset.view;
updateViewButtons();
fetchAndRender();
});
});
document.getElementById('btn-settings').onclick = openSettingsModal;
document.getElementById('btn-create-event').onclick = () => openNewEventModal(new Date());
}
// ── Sidebar toggle ────────────────────────────────────────
function bindSidebar() {
document.getElementById('sidebar-toggle').onclick = () => {
document.getElementById('sidebar').classList.toggle('collapsed');
};
document.getElementById('btn-add-account').onclick = openAccountModal;
}
// ── Event Popup ───────────────────────────────────────────
function showEventPopup(ev, anchor) {
const popup = document.getElementById('popup-event');
popup.classList.remove('hidden');
const color = ev.color || ev.calendarColor || '#4285f4';
document.getElementById('popup-color-dot').style.background = color;
document.getElementById('popup-title').textContent = ev.title;
// Time
if (ev.allDay) {
document.getElementById('popup-time').textContent = 'Ganztägig';
} else {
const s = new Date(ev.start);
const e = new Date(ev.end);
document.getElementById('popup-time').textContent =
`${fmtDatetime(s)} ${fmtTime(e)}`;
}
document.getElementById('popup-location').textContent = ev.location || '';
document.getElementById('popup-location').style.display = ev.location ? '' : 'none';
document.getElementById('popup-description').textContent = ev.description || '';
document.getElementById('popup-description').style.display = ev.description ? '' : 'none';
document.getElementById('popup-calendar').textContent = ev.calendar_name || '';
// Position near anchor
const rect = anchor.getBoundingClientRect();
const pw = 300, ph = 200;
let left = rect.right + 8;
let top = rect.top;
if (left + pw > window.innerWidth) left = rect.left - pw - 8;
if (top + ph > window.innerHeight) top = window.innerHeight - ph - 16;
popup.style.left = Math.max(8, left) + 'px';
popup.style.top = Math.max(8, top) + 'px';
document.getElementById('popup-edit').onclick = () => {
popup.classList.add('hidden');
openEditEventModal(ev);
};
document.getElementById('popup-delete').onclick = async () => {
if (!confirm(`"${ev.title}" wirklich löschen?`)) return;
popup.classList.add('hidden');
try {
await api.delete(`/caldav/events/${encodeURIComponent(ev.id)}?event_url=${encodeURIComponent(ev.url)}`);
showToast('Termin gelöscht');
fetchAndRender();
} catch (e) { showToast(e.message, true); }
};
document.getElementById('popup-close').onclick = () => popup.classList.add('hidden');
}
// Close popup on outside click
document.addEventListener('click', e => {
const popup = document.getElementById('popup-event');
if (!popup.classList.contains('hidden') && !popup.contains(e.target)) {
popup.classList.add('hidden');
}
});
// ── Event Modal ───────────────────────────────────────────
function populateCalendarSelect(selectedId) {
const sel = document.getElementById('ev-calendar');
sel.innerHTML = '';
state.accounts.forEach(acc => {
acc.calendars.filter(c => c.enabled).forEach(cal => {
const opt = document.createElement('option');
opt.value = cal.id;
opt.textContent = `${acc.name} / ${cal.name}`;
if (cal.id === selectedId) opt.selected = true;
sel.appendChild(opt);
});
});
}
function openNewEventModal(date) {
state.editingEvent = null;
state.selectedEventColor = '';
document.getElementById('modal-event-title-label').textContent = 'Termin erstellen';
document.getElementById('ev-title').value = '';
document.getElementById('ev-location').value = '';
document.getElementById('ev-description').value = '';
document.getElementById('ev-allday').checked = false;
const start = new Date(date);
const end = new Date(date);
end.setHours(end.getHours() + 1);
document.getElementById('ev-start').value = toLocalDatetimeInput(start);
document.getElementById('ev-end').value = toLocalDatetimeInput(end);
document.getElementById('ev-start-date').value = toDateInput(start);
document.getElementById('ev-end-date').value = toDateInput(start);
toggleAlldayFields(false);
populateCalendarSelect(null);
resetColorPicker('');
document.getElementById('ev-delete').classList.add('hidden');
openModal('modal-event');
}
function openEditEventModal(ev) {
state.editingEvent = ev;
state.selectedEventColor = ev.color || '';
document.getElementById('modal-event-title-label').textContent = 'Termin bearbeiten';
document.getElementById('ev-title').value = ev.title;
document.getElementById('ev-location').value = ev.location || '';
document.getElementById('ev-description').value = ev.description || '';
document.getElementById('ev-allday').checked = ev.allDay;
if (ev.allDay) {
document.getElementById('ev-start-date').value = ev.start.slice(0, 10);
document.getElementById('ev-end-date').value = ev.end.slice(0, 10);
toggleAlldayFields(true);
} else {
const s = new Date(ev.start);
const e = new Date(ev.end);
document.getElementById('ev-start').value = toLocalDatetimeInput(s);
document.getElementById('ev-end').value = toLocalDatetimeInput(e);
toggleAlldayFields(false);
}
populateCalendarSelect(ev.calendar_id);
resetColorPicker(ev.color || '');
document.getElementById('ev-delete').classList.remove('hidden');
openModal('modal-event');
}
function toggleAlldayFields(allDay) {
document.getElementById('ev-time-row').style.display = allDay ? 'none' : '';
document.getElementById('ev-date-row').style.display = allDay ? '' : 'none';
}
function resetColorPicker(color) {
state.selectedEventColor = color;
document.querySelectorAll('#ev-color-picker .color-swatch').forEach(sw => {
sw.classList.toggle('active', (sw.dataset.color || '') === color);
});
}
function bindEventModal() {
document.getElementById('ev-allday').addEventListener('change', e => {
toggleAlldayFields(e.target.checked);
});
document.querySelectorAll('#ev-color-picker .color-swatch').forEach(sw => {
sw.addEventListener('click', () => {
state.selectedEventColor = sw.dataset.color || '';
resetColorPicker(state.selectedEventColor);
});
});
document.getElementById('ev-save').onclick = async () => {
const title = document.getElementById('ev-title').value.trim();
if (!title) { showToast('Bitte Titel eingeben', true); return; }
const allDay = document.getElementById('ev-allday').checked;
const calId = parseInt(document.getElementById('ev-calendar').value);
const loc = document.getElementById('ev-location').value.trim();
const desc = document.getElementById('ev-description').value.trim();
const color = state.selectedEventColor;
let start, end;
if (allDay) {
start = document.getElementById('ev-start-date').value;
end = document.getElementById('ev-end-date').value;
if (!start) { showToast('Bitte Datum eingeben', true); return; }
if (!end || end < start) end = start;
} else {
const sv = document.getElementById('ev-start').value;
const ev2 = document.getElementById('ev-end').value;
if (!sv) { showToast('Bitte Start-Zeit eingeben', true); return; }
start = new Date(sv).toISOString();
end = ev2 ? new Date(ev2).toISOString() : new Date(new Date(sv).getTime() + 3600000).toISOString();
}
try {
if (state.editingEvent) {
await api.put(
`/caldav/events/${encodeURIComponent(state.editingEvent.id)}?event_url=${encodeURIComponent(state.editingEvent.url)}`,
{ title, start, end, allDay, location: loc, description: desc, color: color || null }
);
showToast('Termin aktualisiert');
} else {
await api.post('/caldav/events', {
calendar_id: calId, title, start, end, allDay,
location: loc, description: desc, color: color || null,
});
showToast('Termin erstellt');
}
closeModal('modal-event');
fetchAndRender();
} catch (e) {
showToast(e.message, true);
}
};
document.getElementById('ev-delete').onclick = async () => {
const ev = state.editingEvent;
if (!ev) return;
if (!confirm(`"${ev.title}" wirklich löschen?`)) return;
try {
await api.delete(`/caldav/events/${encodeURIComponent(ev.id)}?event_url=${encodeURIComponent(ev.url)}`);
showToast('Termin gelöscht');
closeModal('modal-event');
fetchAndRender();
} catch (e) { showToast(e.message, true); }
};
}
// ── Account Modal ─────────────────────────────────────────
function openAccountModal() {
document.getElementById('acc-name').value = '';
document.getElementById('acc-url').value = '';
document.getElementById('acc-username').value = '';
document.getElementById('acc-password').value = '';
document.getElementById('acc-color').value = '#4285f4';
document.getElementById('acc-error').classList.add('hidden');
openModal('modal-account');
}
function bindAccountModal() {
document.getElementById('acc-save').onclick = async () => {
const name = document.getElementById('acc-name').value.trim();
const url = document.getElementById('acc-url').value.trim();
const username = document.getElementById('acc-username').value.trim();
const password = document.getElementById('acc-password').value;
const color = document.getElementById('acc-color').value;
const errEl = document.getElementById('acc-error');
if (!name || !url || !username || !password) {
errEl.textContent = 'Bitte alle Felder ausfüllen';
errEl.classList.remove('hidden');
return;
}
errEl.classList.add('hidden');
document.getElementById('acc-save').disabled = true;
document.getElementById('acc-save').textContent = 'Verbinde…';
try {
const acc = await api.post('/caldav/accounts', { name, url, username, password, color });
state.accounts.push(acc);
renderCalendarList();
closeModal('modal-account');
showToast(`Konto "${name}" hinzugefügt`);
fetchAndRender();
} catch (e) {
errEl.textContent = e.message;
errEl.classList.remove('hidden');
} finally {
document.getElementById('acc-save').disabled = false;
document.getElementById('acc-save').textContent = 'Verbinden';
}
};
}
// ── Settings Modal ────────────────────────────────────────
function openSettingsModal() {
const s = state.settings;
document.getElementById('cfg-default-view').value = s.default_view || 'month';
document.getElementById('cfg-primary-color').value = s.primary_color || '#4285f4';
document.getElementById('cfg-accent-color').value = s.accent_color || '#ea4335';
document.getElementById('cfg-today-color').value = s.today_color || '#4285f4';
document.getElementById('cfg-dim-past').checked = !!s.dim_past_events;
document.getElementById('cfg-primary-label').textContent = s.primary_color || '#4285f4';
document.getElementById('cfg-accent-label').textContent = s.accent_color || '#ea4335';
document.getElementById('cfg-today-label').textContent = s.today_color || '#4285f4';
// Show users section only for admins
const user = JSON.parse(localStorage.getItem('user') || '{}');
const usersSection = document.getElementById('settings-users-section');
if (user.is_admin) {
usersSection.classList.remove('hidden');
loadUsers();
} else {
usersSection.classList.add('hidden');
}
openModal('modal-settings');
}
async function loadUsers() {
try {
const users = await api.get('/users/');
const list = document.getElementById('users-list');
list.innerHTML = users.map(u =>
`<div class="users-list-item">
<div>
<div class="uname">${escHtml(u.username)}</div>
${u.email ? `<div class="uemail">${escHtml(u.email)}</div>` : ''}
</div>
<div style="display:flex;gap:8px;align-items:center">
${u.is_admin ? '<span class="ubadge">Admin</span>' : ''}
${u.id !== JSON.parse(localStorage.getItem('user')||'{}').id
? `<button class="btn btn-ghost" style="padding:4px 10px;font-size:12px" data-del-user="${u.id}">Löschen</button>`
: ''}
</div>
</div>`
).join('');
list.querySelectorAll('[data-del-user]').forEach(btn => {
btn.addEventListener('click', async () => {
if (!confirm('Benutzer löschen?')) return;
try {
await api.delete(`/users/${btn.dataset.delUser}`);
loadUsers();
} catch (e) { showToast(e.message, true); }
});
});
} catch (e) { /* not admin */ }
}
function bindSettingsModal() {
['cfg-primary-color','cfg-accent-color','cfg-today-color'].forEach(id => {
document.getElementById(id).addEventListener('input', e => {
const labelId = id.replace('color', 'label');
document.getElementById(labelId).textContent = e.target.value;
});
});
document.getElementById('btn-add-user').onclick = () => {
document.getElementById('add-user-form').classList.toggle('hidden');
};
document.getElementById('new-user-save').onclick = async () => {
const username = document.getElementById('new-username').value.trim();
const password = document.getElementById('new-password').value;
const is_admin = document.getElementById('new-is-admin').checked;
if (!username || !password) { showToast('Benutzername und Passwort erforderlich', true); return; }
try {
await api.post('/users/', { username, password, is_admin });
showToast(`Benutzer "${username}" erstellt`);
document.getElementById('add-user-form').classList.add('hidden');
document.getElementById('new-username').value = '';
document.getElementById('new-password').value = '';
loadUsers();
} catch (e) { showToast(e.message, true); }
};
document.getElementById('settings-save').onclick = async () => {
const settings = {
default_view: document.getElementById('cfg-default-view').value,
primary_color: document.getElementById('cfg-primary-color').value,
accent_color: document.getElementById('cfg-accent-color').value,
today_color: document.getElementById('cfg-today-color').value,
dim_past_events: document.getElementById('cfg-dim-past').checked,
};
try {
await api.put('/settings/', settings);
state.settings = { ...state.settings, ...settings };
state.dimPast = settings.dim_past_events;
applyTheme(settings);
showToast('Einstellungen gespeichert');
closeModal('modal-settings');
renderView();
} catch (e) { showToast(e.message, true); }
};
}
// ── Modal helpers ─────────────────────────────────────────
function openModal(id) {
document.getElementById(id).classList.remove('hidden');
}
function closeModal(id) {
document.getElementById(id).classList.add('hidden');
}
// Close button bindings (added once)
document.querySelectorAll('.modal-close, [data-modal]').forEach(el => {
el.addEventListener('click', () => {
const target = el.dataset.modal || el.closest('.modal-overlay')?.id;
if (target) closeModal(target);
});
});
document.querySelectorAll('.modal-overlay').forEach(overlay => {
overlay.addEventListener('click', e => {
if (e.target === overlay) closeModal(overlay.id);
});
});
// ── Toast ─────────────────────────────────────────────────
let toastTimer = null;
export function showToast(msg, isError = false) {
const el = document.getElementById('toast');
el.textContent = msg;
el.className = 'toast' + (isError ? ' error' : '');
el.classList.remove('hidden');
if (toastTimer) clearTimeout(toastTimer);
toastTimer = setTimeout(() => el.classList.add('hidden'), 3500);
}
// ── Helpers ───────────────────────────────────────────────
function fmtTime(d) {
return d.toLocaleTimeString('de', { hour: '2-digit', minute: '2-digit' });
}
function fmtDatetime(d) {
return d.toLocaleString('de', { weekday:'short', day:'2-digit', month:'short', hour:'2-digit', minute:'2-digit' });
}
function escHtml(s) {
return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
}