refactor: use new components context

Signed-off-by: Camila Belo <camilaibs@gmail.com>

packages/frontend-plugin-api/src/components/ComponentsContext.tsx

@@ -0,0 +1,58 @@
+/*
+ * 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 { ComponentRef } from '@backstage/frontend-plugin-api';
+import {
+  createVersionedContext,
+  createVersionedValueMap,
+  useVersionedContext,
+} from '@backstage/version-bridge';
+import React from 'react';
+import { ComponentType, PropsWithChildren } from 'react';
+
+/** @public */
+export type ComponentsContextValue = Record<string, ComponentType<any>>;
+
+const ComponentsContext = createVersionedContext<{ 1: ComponentsContextValue }>(
+  'components-context',
+);
+
+/** @public */
+export function ComponentsProvider(
+  props: PropsWithChildren<{ value: ComponentsContextValue }>,
+) {
+  const { value, children } = props;
+  return (
+    <ComponentsContext.Provider value={createVersionedValueMap({ 1: value })}>
+      {children}
+    </ComponentsContext.Provider>
+  );
+}
+
+/** @public */
+export function useComponent<
+  P extends {},
+  T extends ComponentRef<ComponentType<P>>,
+>(ref: T): T['T'] {
+  const components = useVersionedContext<{ 1: ComponentsContextValue }>(
+    'components-context',
+  );
+  const component = components?.atVersion(1)?.[ref.id];
+  if (!component) {
+    throw new Error(`No implementation available for ${ref.id}`);
+  }
+  return component;
+}

packages/frontend-plugin-api/src/components/index.ts

@@ -14,6 +14,12 @@
  * limitations under the License.
  */
 
+export {
+  ComponentsProvider,
+  useComponent,
+  type ComponentsContextValue,
+} from './ComponentsContext';
+
 export {
   coreProgressComponentRef,
   coreBootErrorPageComponentRef,