chore: move notification processor filters to common package

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

plugins/notifications-common/api-report.md

@@ -3,6 +3,13 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
+import { Config } from '@backstage/config';
+
+// @public (undocumented)
+export const getProcessorFiltersFromConfig: (
+  config: Config,
+) => NotificationProcessorFilters;
+
 // @public (undocumented)
 export type NewNotificationSignal = {
   action: 'new_notification';
@@ -33,6 +40,13 @@ export type NotificationPayload = {
   icon?: string;
 };
 
+// @public (undocumented)
+export type NotificationProcessorFilters = {
+  minSeverity?: NotificationSeverity;
+  maxSeverity?: NotificationSeverity;
+  excludedTopics?: string[];
+};
+
 // @public (undocumented)
 export type NotificationReadSignal = {
   action: 'notification_read' | 'notification_unread';

plugins/notifications-common/package.json

@@ -32,6 +32,7 @@
     "test": "backstage-cli package test"
   },
   "dependencies": {
+    "@backstage/config": "workspace:^",
     "@material-ui/icons": "^4.9.1"
   },
   "devDependencies": {

plugins/notifications-common/src/filters.ts

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2024 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 { Config } from '@backstage/config';
+import { NotificationProcessorFilters, NotificationSeverity } from './types';
+import { notificationSeverities } from './constants';
+
+/** @public */
+export const getProcessorFiltersFromConfig = (config: Config) => {
+  const filter: NotificationProcessorFilters = {};
+  const minSeverity = config.getOptionalString(
+    'filter.minSeverity',
+  ) as NotificationSeverity;
+  if (minSeverity) {
+    if (notificationSeverities.includes(minSeverity)) {
+      filter.minSeverity = minSeverity;
+    } else {
+      throw new Error(`Invalid minSeverity: ${minSeverity}`);
+    }
+  }
+  const maxSeverity = config.getOptionalString(
+    'filter.maxSeverity',
+  ) as NotificationSeverity;
+  if (maxSeverity) {
+    if (notificationSeverities.includes(maxSeverity)) {
+      filter.maxSeverity = maxSeverity;
+    } else {
+      throw new Error(`Invalid maxSeverity: ${maxSeverity}`);
+    }
+  }
+  filter.excludedTopics = config.getOptionalStringArray(
+    'filter.excludedTopics',
+  );
+  return filter;
+};

plugins/notifications-common/src/index.ts

@@ -22,3 +22,4 @@
 
 export * from './types';
 export * from './constants';
+export * from './filters';

plugins/notifications-common/src/types.ts

@@ -116,3 +116,12 @@ export type NotificationReadSignal = {
 
 /** @public */
 export type NotificationSignal = NewNotificationSignal | NotificationReadSignal;
+
+/**
+ * @public
+ */
+export type NotificationProcessorFilters = {
+  minSeverity?: NotificationSeverity;
+  maxSeverity?: NotificationSeverity;
+  excludedTopics?: string[];
+};