feat: add removable reference feature vertical slice

src/features/reference-feature/application/reference-feature-api.ts

@@ -0,0 +1,58 @@
+import type { ApiFailure } from "../../../contracts/errors.js";
+import {
+  toReferenceView,
+  type ReferenceResourceView,
+} from "../contracts/reference-mapper.js";
+import type { ReferenceResource } from "../domain/reference-resource.js";
+
+export type ReferenceListFilters = Readonly<{
+  cursor?: string;
+  limit: number;
+  tags?: readonly string[];
+}>;
+
+export type ReferenceResult<Value> =
+  | Readonly<{ ok: true; value: Value }>
+  | Readonly<{ ok: false; error: ApiFailure }>;
+
+export type ReferenceFeatureInput = Readonly<{
+  listResources(
+    filters: ReferenceListFilters,
+    context?: Readonly<{ signal?: AbortSignal }>,
+  ): Promise<ReferenceResult<readonly ReferenceResourceView[]>>;
+  createResource(
+    command: Readonly<{ name: string }>,
+  ): Promise<ReferenceResult<ReferenceResourceView>>;
+}>;
+
+export type ReferenceGateway = Readonly<{
+  list(
+    filters: ReferenceListFilters,
+    context?: Readonly<{ signal?: AbortSignal }>,
+  ): Promise<ReferenceResult<readonly ReferenceResource[]>>;
+  create(
+    command: Readonly<{ name: string }>,
+  ): Promise<ReferenceResult<ReferenceResource>>;
+}>;
+
+export function createReferenceFeatureInput(
+  gateway: ReferenceGateway,
+): ReferenceFeatureInput {
+  return Object.freeze({
+    async listResources(filters, context) {
+      const result = await gateway.list(filters, context);
+      return result.ok
+        ? {
+            ok: true as const,
+            value: result.value.map((resource) => toReferenceView(resource)),
+          }
+        : result;
+    },
+    async createResource(command) {
+      const result = await gateway.create(command);
+      return result.ok
+        ? { ok: true as const, value: toReferenceView(result.value) }
+        : result;
+    },
+  });
+}