feat(core/transform): adds asImplementation and asDeclaration

packages/core/src/transform/as.ts

@@ -0,0 +1,26 @@
+import { CollectionTree, CollectionTreeImplementation, Service } from '~/types';
+import { replace } from './replace';
+import { isElementService, isServiceImplementation } from '~/inspect';
+
+export function asImplementation<T extends CollectionTree>(
+  collection: T,
+  fn: (service: Service, data: { path: string[]; route: string[] }) => Service
+): T & CollectionTreeImplementation {
+  return replace(collection, (element, next, data) => {
+    element = next(element);
+    return isElementService(element) ? fn(element, data) : element;
+  }) as T & CollectionTreeImplementation;
+}
+
+export function asDeclaration(collection: CollectionTree): CollectionTree {
+  return replace(collection, (element, next) => {
+    element = next(element);
+
+    if (isElementService(element) && isServiceImplementation(element)) {
+      const { resolve, ...service } = element;
+      return service;
+    }
+
+    return element;
+  });
+}

packages/core/src/transform/index.ts

@@ -1,3 +1,4 @@
 export * from './replace';
 export * from './normalize';
+export * from './as';
 export * from './routes';