feat: complete DM pairing codes with channel adapters, gateway handlers, and TUI command (Tier 4 feature 4)

src/channels/whatsapp/adapter.ts

@@ -18,6 +18,7 @@ import type {
   ChannelStatus,
 } from '../types.js';
 import { splitMessage } from '../utils.js';
+import type { PairingManager } from '../pairing.js';
 
 /** Configuration for the WhatsApp channel adapter. */
 export interface WhatsAppAdapterConfig {
@@ -29,6 +30,8 @@ export interface WhatsAppAdapterConfig {
   requireMention?: boolean;
   /** Directory for session persistence (LocalAuth data path). */
   dataDir?: string;
+  /** Optional pairing manager for DM pairing codes. */
+  pairingManager?: PairingManager;
 }
 
 /** Minimal shape of a whatsapp-web.js message. */
@@ -232,7 +235,26 @@ export class WhatsAppAdapter implements ChannelAdapter {
         this.config.allowedNumbers.length > 0 &&
         !this.config.allowedNumbers.includes(phoneNumber)
       ) {
-        return;
+        // Pairing fallback — check if the sender is approved or sending a valid code
+        const pm = this.config.pairingManager;
+        if (pm?.enabled) {
+          if (pm.isApproved('whatsapp', phoneNumber)) {
+            // Approved — fall through to normal message handling
+          } else {
+            const text = (message.body ?? '').trim();
+            if (text && pm.validateCode('whatsapp', phoneNumber, text)) {
+              // Code validated — send confirmation via WhatsApp
+              if (this.client) {
+                try {
+                  await this.client.sendMessage(from, 'Pairing successful! You can now chat with Flynn.');
+                } catch { /* ignore send errors */ }
+              }
+            }
+            return;
+          }
+        } else {
+          return;
+        }
       }
     }