new node.js impl., removed old stuff

email-worker-nodejs/main.ts

@@ -0,0 +1,89 @@
+/**
+ * Main entry point for unified email worker
+ *
+ * Startup sequence:
+ *  1. Load configuration and domains
+ *  2. Start Prometheus metrics server
+ *  3. Start health check server
+ *  4. Initialize UnifiedWorker
+ *  5. Register signal handlers for graceful shutdown
+ */
+
+import { config, loadDomains } from './config.js';
+import { log } from './logger.js';
+import { startMetricsServer, type MetricsCollector } from './metrics.js';
+import { startHealthServer } from './health.js';
+import { UnifiedWorker } from './worker/index.js';
+
+// ---------------------------------------------------------------------------
+// Banner
+// ---------------------------------------------------------------------------
+function printBanner(domains: string[]): void {
+  log('╔══════════════════════════════════════════════════╗');
+  log('║        Unified Email Worker (TypeScript)         ║');
+  log('║               Version 2.0.0                      ║');
+  log('╚══════════════════════════════════════════════════╝');
+  log('');
+  log(`Domains (${domains.length}):`);
+  for (const d of domains) {
+    log(`  • ${d}`);
+  }
+  log('');
+  log(`SMTP: ${config.smtpHost}:${config.smtpPort}`);
+  log(`Internal SMTP: port ${config.internalSmtpPort}`);
+  log(`Poll interval: ${config.pollInterval}s`);
+  log(`Metrics: port ${config.metricsPort}`);
+  log(`Health:  port ${config.healthPort}`);
+  log('');
+}
+
+// ---------------------------------------------------------------------------
+// Main
+// ---------------------------------------------------------------------------
+async function main(): Promise<void> {
+  // 1. Load domains
+  const domains = loadDomains();
+  if (domains.length === 0) {
+    log('❌ No domains configured. Set DOMAINS env var or provide DOMAINS_FILE.', 'ERROR');
+    process.exit(1);
+  }
+
+  printBanner(domains);
+
+  // 2. Metrics server
+  const metrics: MetricsCollector | null = await startMetricsServer(config.metricsPort);
+
+  // 3. Unified worker
+  const worker = new UnifiedWorker(domains, metrics);
+
+  // 4. Health server
+  startHealthServer(config.healthPort, domains, () => worker.getStats());
+
+  // 5. Signal handlers
+  let shuttingDown = false;
+
+  const shutdown = async (signal: string) => {
+    if (shuttingDown) return;
+    shuttingDown = true;
+    log(`\n🛑 Received ${signal}. Shutting down gracefully...`);
+    await worker.stop();
+    log('👋 Goodbye.');
+    process.exit(0);
+  };
+
+  process.on('SIGINT', () => shutdown('SIGINT'));
+  process.on('SIGTERM', () => shutdown('SIGTERM'));
+
+  // 6. Start
+  await worker.start();
+
+  // Keep alive (event loop stays open due to HTTP servers + SQS polling)
+  log('✅ Worker is running. Press Ctrl+C to stop.');
+}
+
+// ---------------------------------------------------------------------------
+main().catch((err) => {
+  log(`💥 Fatal startup error: ${err.message ?? err}`, 'CRITICAL');
+  log(err.stack ?? '', 'CRITICAL');
+  process.exit(1);
+});