frontend-plugin-api: added IconsApi

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/flat-wasps-fold.md

@@ -0,0 +1,5 @@
+---
+'@backstage/frontend-plugin-api': patch
+---
+
+Added initial `IconsApi` definition.

packages/frontend-plugin-api/api-report.md

@@ -976,6 +976,19 @@ export type IconComponent = ComponentType<
     }
 >;
 
+// @public
+export interface IconsApi {
+  // (undocumented)
+  getIcon(key: string): IconComponent | undefined;
+  // (undocumented)
+  listIconKeys(): {
+    keys: Iterable<string>;
+  };
+}
+
+// @public
+export const iconsApiRef: ApiRef<IconsApi>;
+
 export { IdentityApi };
 
 export { identityApiRef };

packages/frontend-plugin-api/src/apis/definitions/IconsApi.ts

@@ -0,0 +1,38 @@
+/*
+ * 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 { createApiRef } from '@backstage/core-plugin-api';
+import { IconComponent } from '../../icons';
+
+/**
+ * API for accessing app icons.
+ *
+ * @public
+ */
+export interface IconsApi {
+  getIcon(key: string): IconComponent | undefined;
+
+  listIconKeys(): { keys: Iterable<string> };
+}
+
+/**
+ * The `ApiRef` of {@link IconsApi}.
+ *
+ * @public
+ */
+export const iconsApiRef = createApiRef<IconsApi>({
+  id: 'core.icons',
+});

packages/frontend-plugin-api/src/apis/definitions/index.ts

@@ -40,6 +40,7 @@ export * from './DiscoveryApi';
 export * from './ErrorApi';
 export * from './FeatureFlagsApi';
 export * from './FetchApi';
+export * from './IconsApi';
 export * from './IdentityApi';
 export * from './OAuthRequestApi';
 export * from './StorageApi';