feat: Phase 4 — Wetter-Widget, Wiederkehrende Aufgaben, Kanban-Ansicht, PWA

- server/routes/weather.js: OpenWeatherMap-Proxy (aktuelles Wetter + 3-Tage-Forecast, 30-min-Cache, graceful fallback wenn kein API-Key gesetzt) - public/pages/dashboard.js: Weather-Widget parallel mit Dashboard-Daten laden - public/styles/dashboard.css: Weather-Widget-Styles (Gradient, Forecast-Strip) - server/services/recurrence.js: RRULE-Parser (FREQ=DAILY/WEEKLY/MONTHLY, BYDAY, INTERVAL, UNTIL) + nextOccurrence()-Funktion - server/routes/tasks.js: Bei PATCH /:id/status = done → nächste Instanz wiederkehrender Aufgaben automatisch anlegen - public/pages/tasks.js: Kanban-Ansicht (3 Spalten: Offen/In Bearbeitung/Erledigt) mit HTML5 Drag & Drop, View-Toggle (Liste/Kanban) - public/styles/tasks.css: Kanban-Board-Styles (Spalten, Cards, Drag-over-Highlight) - public/sw.js: Cache-Version auf v2, alle Modul-CSS-Dateien im APP_SHELL-Cache Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-24 21:32:22 +01:00
parent 74b6e5f078
commit 450ae37f42
8 changed files with 669 additions and 26 deletions
@@ -4,10 +4,92 @@
 * Abhängigkeiten: express, node-fetch, dotenv
 */

-const express = require('express');
-const router = express.Router();
+'use strict';

-// Platzhalter — wird in Phase 4 implementiert
-router.get('/', (req, res) => res.json({ data: null }));
+const express = require('express');
+const router  = express.Router();
+
+// Cache: Daten für 30 Minuten halten
+let cache = { data: null, ts: 0 };
+const CACHE_TTL_MS = 30 * 60 * 1000;
+
+// --------------------------------------------------------
+// GET /api/v1/weather
+// Gibt aktuelles Wetter + 3-Tage-Vorschau zurück.
+// Erfordert OPENWEATHER_API_KEY + OPENWEATHER_CITY in .env
+// Response: { data: { current, forecast } } | { data: null }
+// --------------------------------------------------------
+router.get('/', async (req, res) => {
+  try {
+    const apiKey = process.env.OPENWEATHER_API_KEY;
+    const city   = process.env.OPENWEATHER_CITY || 'Berlin';
+    const units  = process.env.OPENWEATHER_UNITS || 'metric';
+    const lang   = process.env.OPENWEATHER_LANG  || 'de';
+
+    // Kein API-Key → leere Antwort (Widget wird ausgeblendet)
+    if (!apiKey) {
+      return res.json({ data: null });
+    }
+
+    // Cache prüfen
+    if (cache.data && Date.now() - cache.ts < CACHE_TTL_MS) {
+      return res.json({ data: cache.data });
+    }
+
+    // Dynamischer Import für node-fetch (ESM)
+    const { default: fetch } = await import('node-fetch');
+
+    // Aktuelles Wetter
+    const currentUrl = `https://api.openweathermap.org/data/2.5/weather?q=${encodeURIComponent(city)}&appid=${apiKey}&units=${units}&lang=${lang}`;
+    const currentRes = await fetch(currentUrl, { signal: AbortSignal.timeout(8000) });
+    if (!currentRes.ok) {
+      console.warn(`[Weather] API Fehler: ${currentRes.status}`);
+      return res.json({ data: null });
+    }
+    const currentJson = await currentRes.json();
+
+    // 5-Tage-Forecast (3h-Intervalle → wir nehmen Mittags-Werte für Tagesvorschau)
+    const forecastUrl = `https://api.openweathermap.org/data/2.5/forecast?q=${encodeURIComponent(city)}&appid=${apiKey}&units=${units}&lang=${lang}&cnt=24`;
+    const forecastRes = await fetch(forecastUrl, { signal: AbortSignal.timeout(8000) });
+    let forecastDays = [];
+    if (forecastRes.ok) {
+      const forecastJson = await forecastRes.json();
+      // Ein Eintrag pro Tag: nächstgelegener Mittags-Wert (12:00 Uhr)
+      const seen = new Set();
+      for (const item of forecastJson.list ?? []) {
+        const dateStr = item.dt_txt.slice(0, 10); // YYYY-MM-DD
+        if (seen.has(dateStr)) continue;
+        seen.add(dateStr);
+        forecastDays.push({
+          date:      dateStr,
+          temp_min:  Math.round(item.main.temp_min),
+          temp_max:  Math.round(item.main.temp_max),
+          icon:      item.weather[0]?.icon,
+          desc:      item.weather[0]?.description,
+        });
+        if (forecastDays.length >= 3) break;
+      }
+    }
+
+    const data = {
+      city: currentJson.name,
+      current: {
+        temp:       Math.round(currentJson.main.temp),
+        feels_like: Math.round(currentJson.main.feels_like),
+        humidity:   currentJson.main.humidity,
+        icon:       currentJson.weather[0]?.icon,
+        desc:       currentJson.weather[0]?.description,
+        wind_speed: Math.round((currentJson.wind?.speed ?? 0) * 3.6), // m/s → km/h
+      },
+      forecast: forecastDays,
+    };
+
+    cache = { data, ts: Date.now() };
+    res.json({ data });
+  } catch (err) {
+    console.warn('[Weather] Fehler:', err.message);
+    res.json({ data: null }); // Fallback: Widget ausblenden, kein Error-Screen
+  }
+});

 module.exports = router;