new node.js impl., removed old stuff

email-worker-nodejs/sqs.ts

@@ -0,0 +1,99 @@
+/**
+ * SQS operations handler
+ *
+ * Responsibilities:
+ *  - Resolve queue URL for a domain
+ *  - Long-poll for messages
+ *  - Delete processed messages
+ *  - Report approximate queue size
+ */
+
+import {
+  SQSClient,
+  GetQueueUrlCommand,
+  ReceiveMessageCommand,
+  DeleteMessageCommand,
+  GetQueueAttributesCommand,
+  type Message,
+} from '@aws-sdk/client-sqs';
+import { config, domainToQueueName } from '../config.js';
+import { log } from '../logger.js';
+
+export class SQSHandler {
+  private client: SQSClient;
+
+  constructor() {
+    this.client = new SQSClient({ region: config.awsRegion });
+  }
+
+  /** Resolve queue URL for a domain. Returns null if queue does not exist. */
+  async getQueueUrl(domain: string): Promise<string | null> {
+    const queueName = domainToQueueName(domain);
+    try {
+      const resp = await this.client.send(
+        new GetQueueUrlCommand({ QueueName: queueName }),
+      );
+      return resp.QueueUrl ?? null;
+    } catch (err: any) {
+      if (err.name === 'QueueDoesNotExist' ||
+          err.Code === 'AWS.SimpleQueueService.NonExistentQueue') {
+        log(`Queue not found for domain: ${domain}`, 'WARNING');
+      } else {
+        log(`Error getting queue URL for ${domain}: ${err.message ?? err}`, 'ERROR');
+      }
+      return null;
+    }
+  }
+
+  /** Long-poll for messages (uses configured poll interval as wait time). */
+  async receiveMessages(queueUrl: string): Promise<Message[]> {
+    try {
+      const resp = await this.client.send(
+        new ReceiveMessageCommand({
+          QueueUrl: queueUrl,
+          MaxNumberOfMessages: config.maxMessages,
+          WaitTimeSeconds: config.pollInterval,
+          VisibilityTimeout: config.visibilityTimeout,
+          MessageSystemAttributeNames: ['ApproximateReceiveCount', 'SentTimestamp'],
+        }),
+      );
+      return resp.Messages ?? [];
+    } catch (err: any) {
+      log(`Error receiving messages: ${err.message ?? err}`, 'ERROR');
+      return [];
+    }
+  }
+
+  /** Delete a message from the queue after successful processing. */
+  async deleteMessage(queueUrl: string, receiptHandle: string): Promise<void> {
+    try {
+      await this.client.send(
+        new DeleteMessageCommand({
+          QueueUrl: queueUrl,
+          ReceiptHandle: receiptHandle,
+        }),
+      );
+    } catch (err: any) {
+      log(`Error deleting message: ${err.message ?? err}`, 'ERROR');
+      throw err;
+    }
+  }
+
+  /** Approximate number of messages in the queue. Returns 0 on error. */
+  async getQueueSize(queueUrl: string): Promise<number> {
+    try {
+      const resp = await this.client.send(
+        new GetQueueAttributesCommand({
+          QueueUrl: queueUrl,
+          AttributeNames: ['ApproximateNumberOfMessages'],
+        }),
+      );
+      return parseInt(
+        resp.Attributes?.ApproximateNumberOfMessages ?? '0',
+        10,
+      );
+    } catch {
+      return 0;
+    }
+  }
+}