create stack-overflow backend plugin and move collator there

Signed-off-by: Emma Indal <emma.indahl@gmail.com>

plugins/stack-overflow/README.md

@@ -17,30 +17,9 @@ stackoverflow:
 
 ## Areas of Responsibility
 
-This search plugin is primarily responsible for the following:
+This stack overflow frontend plugin is primarily responsible for the following:
 
 - Exposing various stack-overflow related components like `<StackOverflowSearchResultListItem />` which can be used for composing the search page, and `<HomePageStackOverflowQuestions/>` which can be used for composing the homepage.
-- Provides a `StackOverflowQuestionsCollator`, which can be used in the search backend to index stack overflow questions to your Backstage Search.
-
-### Index Stack Overflow Questions to search
-
-Before you are able to start index stack overflow questions to search, you need to go through the [search getting started guide](https://backstage.io/docs/features/search/getting-started).
-
-When you have your `packages/backend/src/plugins/search.ts` file ready to make modifications, add the following code snippet to add the `StackOverflowQuestionsCollator`. Note that you can modify the `requestParams`.
-
-```ts
-indexBuilder.addCollator({
-  defaultRefreshIntervalSeconds: 60,
-  collator: new StackOverflowQuestionsCollator({
-    config,
-    requestParams: {
-      tagged: ['backstage'],
-      site: 'stackoverflow',
-      pagesize: 100,
-    },
-  }),
-});
-```
 
 #### Use specific search result list item for Stack Overflow Question
 

plugins/stack-overflow/src/index.ts

@@ -13,9 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 export {
   stackOverflowPlugin,
   StackOverflowSearchResultListItem,
   HomePageStackOverflowQuestions,
 } from './plugin';
-export { StackOverflowQuestionsCollator } from './search/StackOverflowQuestionsCollator';

plugins/stack-overflow/src/search/StackOverflowQuestionsCollator/StackOverflowQuestionsCollator.tsx

@@ -1,72 +0,0 @@
-/*
- * Copyright 2022 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 { IndexableDocument, DocumentCollator } from '@backstage/search-common';
-import { Config } from '@backstage/config';
-import fetch from 'cross-fetch';
-import qs from 'qs';
-import {
-  StackOverflowQuestion,
-  StackOverflowQuestionsRequestParams,
-} from '../../types';
-
-interface StackOverflowDocument extends IndexableDocument {
-  answers: number;
-  tags: string[];
-}
-
-export class StackOverflowQuestionsCollator implements DocumentCollator {
-  protected baseUrl: string;
-  protected requestParams: StackOverflowQuestionsRequestParams;
-  public readonly type: string = 'stack-overflow';
-
-  constructor({
-    config,
-    requestParams,
-  }: {
-    config: Config;
-    requestParams: StackOverflowQuestionsRequestParams;
-  }) {
-    this.baseUrl = config.getString('stackoverflow.baseUrl');
-    this.requestParams = requestParams;
-  }
-
-  async execute() {
-    const params = this.requestParams
-      ? `?${qs.stringify(this.requestParams)}`
-      : '';
-    const res = await fetch(`${this.baseUrl}/questions${params}`);
-
-    const data = await res.json();
-    return data.items.map(
-      ({
-        title,
-        link,
-        owner: { display_name },
-        tags,
-        answer_count,
-      }: StackOverflowQuestion): StackOverflowDocument => {
-        return {
-          title: title,
-          location: link,
-          text: display_name,
-          tags: tags,
-          answers: answer_count,
-        };
-      },
-    );
-  }
-}

plugins/stack-overflow/src/search/StackOverflowQuestionsCollator/index.ts

@@ -1,17 +0,0 @@
-/*
- * Copyright 2022 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.
- */
-
-export { StackOverflowQuestionsCollator } from './StackOverflowQuestionsCollator';