new node.js impl., removed old stuff

email-worker-nodejs/logger.ts

@@ -0,0 +1,98 @@
+/**
+ * Structured logging for email worker with daily rotation
+ *
+ * Uses pino for high-performance JSON logging.
+ * Console output is human-readable via pino-pretty in dev,
+ * and JSON in production (for Docker json-file driver).
+ *
+ * File logging uses a simple daily rotation approach.
+ */
+
+import pino from 'pino';
+import { existsSync, mkdirSync, createWriteStream, type WriteStream } from 'node:fs';
+import { join } from 'node:path';
+
+// ---------------------------------------------------------------------------
+// Configuration
+// ---------------------------------------------------------------------------
+const LOG_DIR = '/var/log/email-worker';
+const LOG_FILE_PREFIX = 'worker';
+
+// ---------------------------------------------------------------------------
+// File stream (best-effort, never crashes the worker)
+// ---------------------------------------------------------------------------
+let fileStream: WriteStream | null = null;
+let currentDateStr = '';
+
+function getDateStr(): string {
+  return new Date().toISOString().slice(0, 10); // YYYY-MM-DD
+}
+
+function ensureFileStream(): WriteStream | null {
+  const today = getDateStr();
+  if (fileStream && currentDateStr === today) return fileStream;
+
+  try {
+    if (!existsSync(LOG_DIR)) mkdirSync(LOG_DIR, { recursive: true });
+    const filePath = join(LOG_DIR, `${LOG_FILE_PREFIX}.${today}.log`);
+    fileStream = createWriteStream(filePath, { flags: 'a' });
+    currentDateStr = today;
+    return fileStream;
+  } catch {
+    // Silently continue without file logging (e.g. permission issue)
+    return null;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Pino logger
+// ---------------------------------------------------------------------------
+const logger = pino({
+  level: 'info',
+  formatters: {
+    level(label) {
+      return { level: label };
+    },
+  },
+  timestamp: pino.stdTimeFunctions.isoTime,
+  // In production Docker we write plain JSON to stdout;
+  // pino-pretty can be used during dev via `pino-pretty` pipe.
+});
+
+// ---------------------------------------------------------------------------
+// Log level mapping (matches Python worker levels)
+// ---------------------------------------------------------------------------
+type LogLevel = 'DEBUG' | 'INFO' | 'WARNING' | 'ERROR' | 'CRITICAL' | 'SUCCESS';
+
+const LEVEL_MAP: Record<LogLevel, keyof pino.Logger> = {
+  DEBUG: 'debug',
+  INFO: 'info',
+  WARNING: 'warn',
+  ERROR: 'error',
+  CRITICAL: 'fatal',
+  SUCCESS: 'info',
+};
+
+// ---------------------------------------------------------------------------
+// Public API – mirrors Python's  log(message, level, worker_name)
+// ---------------------------------------------------------------------------
+export function log(
+  message: string,
+  level: LogLevel = 'INFO',
+  workerName = 'unified-worker',
+): void {
+  const prefix = level === 'SUCCESS' ? '[SUCCESS] ' : '';
+  const formatted = `[${workerName}] ${prefix}${message}`;
+
+  // Pino
+  const method = LEVEL_MAP[level] ?? 'info';
+  (logger as any)[method](formatted);
+
+  // File (best-effort)
+  const stream = ensureFileStream();
+  if (stream) {
+    const ts = new Date().toISOString().replace('T', ' ').slice(0, 19);
+    const line = `[${ts}] [${level}] [${workerName}] ${prefix}${message}\n`;
+    stream.write(line);
+  }
+}