feat: add support for new backend to notifications

Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>

plugins/notifications-backend/api-report.md

@@ -3,6 +3,7 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
+import { BackendFeature } from '@backstage/backend-plugin-api';
 import express from 'express';
 import { IdentityApi } from '@backstage/plugin-auth-node';
 import { Logger } from 'winston';
@@ -11,6 +12,9 @@ import { NotificationService } from '@backstage/plugin-notifications-node';
 // @public (undocumented)
 export function createRouter(options: RouterOptions): Promise<express.Router>;
 
+// @public
+export const notificationsPlugin: () => BackendFeature;
+
 // @public (undocumented)
 export interface RouterOptions {
   // (undocumented)

plugins/notifications-backend/package.json

@@ -23,6 +23,7 @@
   },
   "dependencies": {
     "@backstage/backend-common": "workspace:^",
+    "@backstage/backend-plugin-api": "workspace:^",
     "@backstage/config": "workspace:^",
     "@backstage/plugin-auth-node": "workspace:^",
     "@backstage/plugin-notifications-node": "workspace:^",

plugins/notifications-backend/src/index.ts

@@ -14,3 +14,4 @@
  * limitations under the License.
  */
 export * from './service/router';
+export * from './plugin';

plugins/notifications-backend/src/plugin.ts

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2023 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { loggerToWinstonLogger } from '@backstage/backend-common';
+import {
+  coreServices,
+  createBackendPlugin,
+} from '@backstage/backend-plugin-api';
+import { createRouter } from './service/router';
+import { notificationService } from '@backstage/plugin-notifications-node';
+
+/**
+ * Notifications backend plugin
+ *
+ * @public
+ */
+export const notificationsPlugin = createBackendPlugin({
+  pluginId: 'notifications',
+  register(env) {
+    env.registerInit({
+      deps: {
+        httpRouter: coreServices.httpRouter,
+        logger: coreServices.logger,
+        identity: coreServices.identity,
+        service: notificationService,
+      },
+      async init({ httpRouter, logger, identity, service }) {
+        httpRouter.use(
+          await createRouter({
+            logger: loggerToWinstonLogger(logger),
+            identity,
+            notificationService: service,
+          }),
+        );
+      },
+    });
+  },
+});