Add LINE channel adapter with webhook ingress and gating

src/gateway/server.ts

@@ -51,6 +51,7 @@ import { RequestBodyTooLargeError, readRequestBody } from '../utils/httpBody.js'
 import type { TeamsAdapter } from '../channels/teams/adapter.js';
 import type { GoogleChatAdapter } from '../channels/googleChat/adapter.js';
 import type { BlueBubblesAdapter } from '../channels/bluebubbles/adapter.js';
+import type { LineAdapter } from '../channels/line/adapter.js';
 
 export interface GatewayServerConfig {
   port: number;
@@ -120,6 +121,8 @@ export interface GatewayServerConfig {
   googleChatHandler?: Pick<GoogleChatAdapter, 'handleRequest'>;
   /** Optional BlueBubbles adapter for inbound iMessage event webhooks. */
   blueBubblesHandler?: Pick<BlueBubblesAdapter, 'handleRequest'>;
+  /** Optional LINE adapter for inbound webhook events. */
+  lineHandler?: Pick<LineAdapter, 'handleRequest'>;
 }
 
 export class GatewayServer {
@@ -724,6 +727,12 @@ export class GatewayServer {
       return;
     }
 
+    // LINE events route — bypass gateway auth (LINE webhook posts directly)
+    if (this.config.lineHandler && req.method === 'POST' && req.url?.startsWith('/line/events')) {
+      await this.config.lineHandler.handleRequest(req, res);
+      return;
+    }
+
     // Apply auth to HTTP requests when configured
     const authConfig = this.config.auth ?? {};
     if (this.config.authHttp !== false && authConfig.token) {
@@ -842,6 +851,11 @@ export class GatewayServer {
     this.config.blueBubblesHandler = handler;
   }
 
+  /** Set the LINE handler for inbound webhook HTTP routes (late binding). */
+  setLineHandler(handler: Pick<LineAdapter, 'handleRequest'>): void {
+    this.config.lineHandler = handler;
+  }
+
   private async startDiscovery(host: string, port: number): Promise<void> {
     const discovery = this.config.discovery;
     if (!discovery?.enabled) {