new structure

email-worker-nodejs/src/email/blocklist.ts

@@ -0,0 +1,62 @@
+/**
+ * Sender blocklist checking with wildcard / glob support
+ *
+ * Uses picomatch for pattern matching (equivalent to Python's fnmatch).
+ * Patterns are stored per-recipient in DynamoDB.
+ */
+
+import picomatch from 'picomatch';
+import type { DynamoDBHandler } from '../aws/dynamodb.js';
+import { log } from '../logger.js';
+
+/**
+ * Extract the bare email address from a From header value.
+ * "John Doe <john@example.com>" → "john@example.com"
+ */
+function extractAddress(sender: string): string {
+  const match = sender.match(/<([^>]+)>/);
+  const addr = match ? match[1] : sender;
+  return addr.trim().toLowerCase();
+}
+
+export class BlocklistChecker {
+  constructor(private dynamodb: DynamoDBHandler) {}
+
+  /**
+   * Batch-check whether a sender is blocked for each recipient.
+   * Uses a single batch DynamoDB call for efficiency.
+   */
+async batchCheckBlockedSenders(
+    recipients: string[],
+    senders: string[], // <-- Geändert zu Array
+    workerName: string,
+  ): Promise<Record<string, boolean>> {
+    const patternsByRecipient = await this.dynamodb.batchGetBlockedPatterns(recipients);
+    
+    // Alle übergebenen Adressen bereinigen
+    const sendersClean = senders.map(s => extractAddress(s)).filter(Boolean);
+    const result: Record<string, boolean> = {};
+
+    for (const recipient of recipients) {
+      const patterns = patternsByRecipient[recipient] ?? [];
+      let isBlocked = false;
+
+      for (const pattern of patterns) {
+        for (const senderClean of sendersClean) {
+          if (picomatch.isMatch(senderClean, pattern.toLowerCase())) {
+            log(
+              `⛔ BLOCKED: Sender ${senderClean} matches pattern '${pattern}' for inbox ${recipient}`,
+              'WARNING',
+              workerName,
+            );
+            isBlocked = true;
+            break;
+          }
+        }
+        if (isBlocked) break;
+      }
+      result[recipient] = isBlocked;
+    }
+    return result;
+  }
+}