Initial commit

backend/utils/logger.js

@@ -0,0 +1,94 @@
+/**
+ * TASKMATE - Logger
+ * =================
+ * Einfaches Logging mit Datei-Ausgabe
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+const LOG_DIR = process.env.LOG_DIR || path.join(__dirname, '..', 'logs');
+const LOG_FILE = path.join(LOG_DIR, 'app.log');
+
+// Log-Verzeichnis erstellen falls nicht vorhanden
+if (!fs.existsSync(LOG_DIR)) {
+  fs.mkdirSync(LOG_DIR, { recursive: true });
+}
+
+/**
+ * Log-Level
+ */
+const LEVELS = {
+  ERROR: 'ERROR',
+  WARN: 'WARN',
+  INFO: 'INFO',
+  DEBUG: 'DEBUG'
+};
+
+/**
+ * Timestamp formatieren
+ */
+function getTimestamp() {
+  return new Date().toISOString();
+}
+
+/**
+ * Log-Nachricht schreiben
+ */
+function log(level, message, meta = {}) {
+  const timestamp = getTimestamp();
+  const metaStr = Object.keys(meta).length > 0 ? ` ${JSON.stringify(meta)}` : '';
+  const logLine = `[${timestamp}] [${level}] ${message}${metaStr}`;
+
+  // Konsole
+  if (level === LEVELS.ERROR) {
+    console.error(logLine);
+  } else if (level === LEVELS.WARN) {
+    console.warn(logLine);
+  } else {
+    console.log(logLine);
+  }
+
+  // Datei (async, non-blocking)
+  fs.appendFile(LOG_FILE, logLine + '\n', (err) => {
+    if (err) console.error('Log-Datei Fehler:', err);
+  });
+}
+
+/**
+ * Log-Rotation (alte Logs löschen)
+ */
+function rotateLogsIfNeeded() {
+  try {
+    const stats = fs.statSync(LOG_FILE);
+    const maxSize = 10 * 1024 * 1024; // 10 MB
+
+    if (stats.size > maxSize) {
+      const archiveName = `app.${Date.now()}.log`;
+      fs.renameSync(LOG_FILE, path.join(LOG_DIR, archiveName));
+
+      // Alte Archive löschen (behalte nur die letzten 5)
+      const files = fs.readdirSync(LOG_DIR)
+        .filter(f => f.startsWith('app.') && f.endsWith('.log') && f !== 'app.log')
+        .sort()
+        .reverse();
+
+      files.slice(5).forEach(f => {
+        fs.unlinkSync(path.join(LOG_DIR, f));
+      });
+    }
+  } catch (err) {
+    // Datei existiert noch nicht, ignorieren
+  }
+}
+
+// Log-Rotation beim Start und alle 6 Stunden prüfen
+rotateLogsIfNeeded();
+setInterval(rotateLogsIfNeeded, 6 * 60 * 60 * 1000);
+
+module.exports = {
+  error: (message, meta) => log(LEVELS.ERROR, message, meta),
+  warn: (message, meta) => log(LEVELS.WARN, message, meta),
+  info: (message, meta) => log(LEVELS.INFO, message, meta),
+  debug: (message, meta) => log(LEVELS.DEBUG, message, meta)
+};