Make the techdocs APIs use the FetchApi

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/techdocs/src/api.ts

@@ -18,17 +18,40 @@ import { EntityName } from '@backstage/catalog-model';
 import { TechDocsEntityMetadata, TechDocsMetadata } from './types';
 import { createApiRef } from '@backstage/core-plugin-api';
 
+/**
+ * Utility API reference for the {@link TechDocsStorageApi}.
+ *
+ * @public
+ */
 export const techdocsStorageApiRef = createApiRef<TechDocsStorageApi>({
   id: 'plugin.techdocs.storageservice',
 });
 
+/**
+ * Utility API reference for the {@link TechDocsApi}.
+ *
+ * @public
+ */
 export const techdocsApiRef = createApiRef<TechDocsApi>({
   id: 'plugin.techdocs.service',
 });
 
+/**
+ * The outcome of a docs sync operation.
+ *
+ * @public
+ */
 export type SyncResult = 'cached' | 'updated';
 
+/**
+ * API which talks to TechDocs storage to fetch files to render.
+ *
+ * @public
+ */
 export interface TechDocsStorageApi {
+  /**
+   * Set to techdocs.requestUrl as the URL for techdocs-backend API.
+   */
   getApiOrigin(): Promise<string>;
   getStorageUrl(): Promise<string>;
   getBuilder(): Promise<string>;
@@ -44,7 +67,15 @@ export interface TechDocsStorageApi {
   ): Promise<string>;
 }
 
+/**
+ * API to talk to techdocs-backend.
+ *
+ * @public
+ */
 export interface TechDocsApi {
+  /**
+   * Set to techdocs.requestUrl as the URL for techdocs-backend API.
+   */
   getApiOrigin(): Promise<string>;
   getTechDocsMetadata(entityId: EntityName): Promise<TechDocsMetadata>;
   getEntityMetadata(entityId: EntityName): Promise<TechDocsEntityMetadata>;

plugins/techdocs/src/client.ts

@@ -16,7 +16,11 @@
 
 import { EntityName } from '@backstage/catalog-model';
 import { Config } from '@backstage/config';
-import { DiscoveryApi, IdentityApi } from '@backstage/core-plugin-api';
+import {
+  DiscoveryApi,
+  FetchApi,
+  IdentityApi,
+} from '@backstage/core-plugin-api';
 import { NotFoundError, ResponseError } from '@backstage/errors';
 import { EventSourcePolyfill } from 'event-source-polyfill';
 import { SyncResult, TechDocsApi, TechDocsStorageApi } from './api';
@@ -24,24 +28,25 @@ import { TechDocsEntityMetadata, TechDocsMetadata } from './types';
 
 /**
  * API to talk to `techdocs-backend`.
+ *
+ * @public
  */
 export class TechDocsClient implements TechDocsApi {
   public configApi: Config;
   public discoveryApi: DiscoveryApi;
   public identityApi: IdentityApi;
+  private fetchApi: FetchApi;
 
-  constructor({
-    configApi,
-    discoveryApi,
-    identityApi,
-  }: {
+  constructor(options: {
     configApi: Config;
     discoveryApi: DiscoveryApi;
     identityApi: IdentityApi;
+    fetchApi?: FetchApi;
   }) {
-    this.configApi = configApi;
-    this.discoveryApi = discoveryApi;
-    this.identityApi = identityApi;
+    this.configApi = options.configApi;
+    this.discoveryApi = options.discoveryApi;
+    this.identityApi = options.identityApi;
+    this.fetchApi = options.fetchApi ?? { fetch };
   }
 
   async getApiOrigin(): Promise<string> {
@@ -67,7 +72,7 @@ export class TechDocsClient implements TechDocsApi {
     const requestUrl = `${apiOrigin}/metadata/techdocs/${namespace}/${kind}/${name}`;
     const { token } = await this.identityApi.getCredentials();
 
-    const request = await fetch(`${requestUrl}`, {
+    const request = await this.fetchApi.fetch(`${requestUrl}`, {
       headers: token ? { Authorization: `Bearer ${token}` } : {},
     });
 
@@ -95,7 +100,7 @@ export class TechDocsClient implements TechDocsApi {
     const requestUrl = `${apiOrigin}/metadata/entity/${namespace}/${kind}/${name}`;
     const { token } = await this.identityApi.getCredentials();
 
-    const request = await fetch(`${requestUrl}`, {
+    const request = await this.fetchApi.fetch(`${requestUrl}`, {
       headers: token ? { Authorization: `Bearer ${token}` } : {},
     });
 
@@ -109,24 +114,28 @@ export class TechDocsClient implements TechDocsApi {
 
 /**
  * API which talks to TechDocs storage to fetch files to render.
+<<<<<<< HEAD
+=======
+ *
+ * @public
+>>>>>>> 31c54b8ea2 (Make the techdocs APIs use the FetchApi)
  */
 export class TechDocsStorageClient implements TechDocsStorageApi {
   public configApi: Config;
   public discoveryApi: DiscoveryApi;
   public identityApi: IdentityApi;
+  private fetchApi: FetchApi;
 
-  constructor({
-    configApi,
-    discoveryApi,
-    identityApi,
-  }: {
+  constructor(options: {
     configApi: Config;
     discoveryApi: DiscoveryApi;
     identityApi: IdentityApi;
+    fetchApi?: FetchApi;
   }) {
-    this.configApi = configApi;
-    this.discoveryApi = discoveryApi;
-    this.identityApi = identityApi;
+    this.configApi = options.configApi;
+    this.discoveryApi = options.discoveryApi;
+    this.identityApi = options.identityApi;
+    this.fetchApi = options.fetchApi ?? { fetch };
   }
 
   async getApiOrigin(): Promise<string> {
@@ -162,7 +171,7 @@ export class TechDocsStorageClient implements TechDocsStorageApi {
     const url = `${storageUrl}/${namespace}/${kind}/${name}/${path}`;
     const { token } = await this.identityApi.getCredentials();
 
-    const request = await fetch(
+    const request = await this.fetchApi.fetch(
       `${url.endsWith('/') ? url : `${url}/`}index.html`,
       {
         headers: token ? { Authorization: `Bearer ${token}` } : {},

plugins/techdocs/src/plugin.ts

@@ -28,6 +28,7 @@ import {
   createPlugin,
   createRoutableExtension,
   discoveryApiRef,
+  fetchApiRef,
   identityApiRef,
 } from '@backstage/core-plugin-api';
 
@@ -40,12 +41,14 @@ export const techdocsPlugin = createPlugin({
         configApi: configApiRef,
         discoveryApi: discoveryApiRef,
         identityApi: identityApiRef,
+        fetchApi: fetchApiRef,
       },
-      factory: ({ configApi, discoveryApi, identityApi }) =>
+      factory: ({ configApi, discoveryApi, identityApi, fetchApi }) =>
         new TechDocsStorageClient({
           configApi,
           discoveryApi,
           identityApi,
+          fetchApi,
         }),
     }),
     createApiFactory({
@@ -54,12 +57,14 @@ export const techdocsPlugin = createPlugin({
         configApi: configApiRef,
         discoveryApi: discoveryApiRef,
         identityApi: identityApiRef,
+        fetchApi: fetchApiRef,
       },
-      factory: ({ configApi, discoveryApi, identityApi }) =>
+      factory: ({ configApi, discoveryApi, identityApi, fetchApi }) =>
         new TechDocsClient({
           configApi,
           discoveryApi,
           identityApi,
+          fetchApi,
         }),
     }),
   ],

plugins/techdocs/src/setupTests.ts

@@ -15,3 +15,4 @@
  */
 
 import '@testing-library/jest-dom';
+import 'cross-fetch/polyfill';