Beobachtungsvorschläge rein
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Eskimue
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'use strict';
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(() => {
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const form = document.getElementById('observation-form');
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const submit = document.getElementById('observation-submit');
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const status = document.getElementById('observation-status');
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const error = document.getElementById('observation-error');
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const results = document.getElementById('observation-results');
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const tbody = document.getElementById('observation-rows');
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const previous = document.getElementById('observation-previous');
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const next = document.getElementById('observation-next');
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const pageSize = 50;
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let data = null;
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let displayedRows = [];
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let groupLimit = 30;
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let page = 0;
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let formatter = null;
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let sortCriteria = [{key: 'altitude', direction: -1}];
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const collator = new Intl.Collator('de-DE', {numeric: true, sensitivity: 'base'});
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const sortButtons = [...document.querySelectorAll('.observation-sort')];
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const sortLabels = Object.fromEntries(sortButtons.map(button => [button.dataset.sort, button.firstChild.textContent.trim()]));
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const sortValue = {
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name: row => row.name,
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type: row => row.type,
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magnitude: row => row.best.magnitude,
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size: row => row.size_arcsec,
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window: row => row.intervals.length ? Date.parse(row.intervals[0].start) : null,
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time: row => Date.parse(row.best.time),
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altitude: row => row.best.altitude,
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azimuth: row => row.best.azimuth,
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};
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function selectRows() {
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if (groupLimit === null) {
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displayedRows = [...data.rows];
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} else {
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const counts = new Map();
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displayedRows = data.rows.filter(row => Number.isFinite(row.best.magnitude))
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.sort((a, b) => a.best.magnitude - b.best.magnitude || b.best.altitude - a.best.altitude
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|| collator.compare(a.name, b.name) || collator.compare(String(a.id), String(b.id)))
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.filter(row => {
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const count = counts.get(row.group) || 0;
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if (count >= groupLimit) return false;
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counts.set(row.group, count + 1);
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return true;
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});
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}
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document.getElementById('observation-limit-status').textContent = groupLimit === null
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? `Alle ${data.rows.length} Treffer werden angezeigt.`
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: `${displayedRows.length} von ${data.rows.length} Treffern: maximal ${groupLimit} hellste je Objektgruppe. Die Tabellensortierung gilt für diese Auswahl.`;
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page = 0;
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applySort();
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render();
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}
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function applyGroupLimit() {
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const input = document.getElementById('observation-group-limit');
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const enabled = document.getElementById('observation-limit-enabled').checked;
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input.disabled = !enabled;
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if (!enabled) {
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groupLimit = null;
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if (data) selectRows();
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return true;
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}
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if (!input.reportValidity()) return false;
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const value = input.valueAsNumber;
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if (!Number.isSafeInteger(value) || value < 1) {
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input.setCustomValidity('Bitte eine positive ganze Zahl eingeben.');
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input.reportValidity();
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return false;
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}
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groupLimit = value;
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if (data) selectRows();
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return true;
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}
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document.getElementById('observation-group-limit').addEventListener('input', event => event.target.setCustomValidity(''));
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document.getElementById('observation-group-limit').addEventListener('change', applyGroupLimit);
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document.getElementById('observation-limit-enabled').addEventListener('change', applyGroupLimit);
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document.getElementById('observation-display-options').addEventListener('submit', event => {
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event.preventDefault();
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applyGroupLimit();
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});
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function applySort() {
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// Sort the complete result set before slicing it into display pages.
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displayedRows.sort((a, b) => {
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for (const {key, direction} of sortCriteria) {
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const av = sortValue[key](a);
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const bv = sortValue[key](b);
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const missingA = av == null || (typeof av === 'number' && !Number.isFinite(av));
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const missingB = bv == null || (typeof bv === 'number' && !Number.isFinite(bv));
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if (missingA !== missingB) return missingA ? 1 : -1;
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const comparison = missingA ? 0 : (typeof av === 'string' ? collator.compare(av, bv) : av - bv);
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if (comparison) return comparison * direction;
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}
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return collator.compare(a.name, b.name) || collator.compare(String(a.id), String(b.id));
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});
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for (const button of sortButtons) {
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const index = sortCriteria.findIndex(item => item.key === button.dataset.sort);
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const criterion = sortCriteria[index];
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if (index === 0) button.closest('th').setAttribute('aria-sort', criterion.direction === 1 ? 'ascending' : 'descending');
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else button.closest('th').removeAttribute('aria-sort');
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button.querySelector('.observation-sort-indicator').textContent = criterion ? `${index + 1} ${criterion.direction === 1 ? '↑' : '↓'}` : '↕';
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button.setAttribute('aria-label', sortLabels[button.dataset.sort] + (criterion
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? `, Sortierkriterium ${index + 1}, ${criterion.direction === 1 ? 'aufsteigend' : 'absteigend'}`
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: ', nicht sortiert'));
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}
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document.getElementById('observation-sort-summary').textContent = 'Sortierung: ' + sortCriteria.map(({key, direction}, index) =>
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`${index + 1}. ${sortLabels[key]} ${direction === 1 ? 'aufsteigend' : 'absteigend'}`).join(' → ');
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}
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const number = (value, digits = 1) => new Intl.NumberFormat('de-DE', {maximumFractionDigits: digits}).format(value);
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const time = value => formatter.format(new Date(value));
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function cell(row, text, note = '') {
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const td = document.createElement('td');
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td.textContent = text;
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if (note) {
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const small = document.createElement('small');
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small.textContent = note;
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td.append(small);
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}
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row.append(td);
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}
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function render() {
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tbody.replaceChildren();
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const fragment = document.createDocumentFragment();
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for (const item of displayedRows.slice(page * pageSize, (page + 1) * pageSize)) {
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const row = document.createElement('tr');
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row.dataset.objectId = item.id;
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cell(row, item.name, item.note);
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cell(row, item.type);
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cell(row, item.best.magnitude === null ? 'Helligkeit unbekannt' : `${number(item.best.magnitude)} mag`, item.magnitude_note);
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cell(row, item.size_arcsec === null ? '—' : `${number(item.size_arcsec)}″`);
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const windows = document.createElement('td');
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for (const interval of item.intervals) {
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const line = document.createElement('div');
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line.textContent = interval.start === interval.end
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? `${time(interval.start)} (ein Messpunkt)`
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: `${time(interval.start)} – ${time(interval.end)}`;
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windows.append(line);
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}
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row.append(windows);
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cell(row, time(item.best.time));
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cell(row, `${number(item.best.altitude)}°`);
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cell(row, `${number(item.best.azimuth)}°`);
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fragment.append(row);
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}
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tbody.append(fragment);
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const pages = Math.max(1, Math.ceil(displayedRows.length / pageSize));
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document.getElementById('observation-pagination').textContent = `Seite ${page + 1} von ${pages} · ${displayedRows.length} Ziele`;
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previous.disabled = page === 0;
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next.disabled = page + 1 >= pages;
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}
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previous.addEventListener('click', () => { if (page > 0) { page--; render(); } });
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next.addEventListener('click', () => { if ((page + 1) * pageSize < displayedRows.length) { page++; render(); } });
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for (const button of sortButtons) {
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button.addEventListener('click', event => {
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if (!data) return;
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const key = button.dataset.sort;
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const existing = sortCriteria.find(item => item.key === key);
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const direction = existing ? -existing.direction : (key === 'altitude' ? -1 : 1);
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if (event.shiftKey || document.getElementById('observation-multi-sort').checked) {
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if (existing) existing.direction = direction;
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else sortCriteria.push({key, direction});
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} else {
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sortCriteria = [{key, direction}];
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}
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page = 0;
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applySort();
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render();
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});
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}
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form.addEventListener('submit', async event => {
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event.preventDefault();
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if (submit.disabled) return;
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if (!applyGroupLimit()) return;
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error.hidden = true;
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const payload = new FormData(form);
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if (!payload.getAll('object_types[]').length || !payload.getAll('night_halves[]').length) {
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error.textContent = 'Bitte mindestens einen Objekttyp und eine Nachthälfte auswählen.';
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error.hidden = false;
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return;
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}
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for (const prefix of ['object-size', 'object-altitude']) {
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const min = document.getElementById(`${prefix}-min`);
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const max = document.getElementById(`${prefix}-max`);
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if (min.value !== '' && max.value !== '' && Number(min.value) > Number(max.value)) {
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error.textContent = 'Das Minimum darf nicht größer als das Maximum sein.';
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error.hidden = false;
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min.focus();
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return;
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}
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}
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submit.disabled = true;
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results.hidden = true;
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form.setAttribute('aria-busy', 'true');
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status.textContent = 'Die Beobachtungsnacht und passende Ziele werden berechnet …';
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try {
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const response = await fetch(form.action, {method: 'POST', body: payload, credentials: 'same-origin'});
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if (!(response.headers.get('content-type') || '').includes('application/json')) {
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throw new Error('Keine gültige Antwort. Bitte die Seite neu laden und erneut anmelden.');
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}
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const result = await response.json();
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if (!response.ok || !result.ok) throw new Error(result.error || 'Die Berechnung ist fehlgeschlagen.');
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data = result;
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page = 0;
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formatter = new Intl.DateTimeFormat('de-DE', {timeZone: data.timezone, day: '2-digit', month: '2-digit', hour: '2-digit', minute: '2-digit', timeZoneName: 'short'});
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status.textContent = data.message || (data.count ? `${data.count} passende Ziele gefunden.` : 'Keine Ziele erfüllen die gewählten Bedingungen.');
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const summary = document.getElementById('observation-summary');
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summary.textContent = `Nacht ab ${payload.get('observation_date')} · ${data.timezone}. `
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+ (data.windows.length ? `Gewählte Nachtabschnitte: ${data.windows.map(w => `${time(w.start)} – ${time(w.end)}`).join('; ')}. ` : '')
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+ '„Zeit der größten Höhe“ bezeichnet den höchsten geprüften Punkt innerhalb deiner Filter und der gewählten Nachtabschnitte. Höhe, Azimut und Helligkeit beziehen sich auf diesen Zeitpunkt. Fünf-Minuten-Raster: sehr kurze Sichtfenster können fehlen.';
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const warnings = document.getElementById('observation-warnings');
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warnings.replaceChildren();
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for (const warning of data.warnings) {
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const item = document.createElement('li');
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item.textContent = warning;
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warnings.append(item);
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}
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selectRows();
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results.hidden = false;
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} catch (failure) {
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status.textContent = 'Berechnung nicht abgeschlossen.';
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error.textContent = failure.message || 'Verbindungsfehler. Bitte erneut versuchen.';
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error.hidden = false;
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} finally {
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submit.disabled = false;
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form.removeAttribute('aria-busy');
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}
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});
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})();
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