Implement fetchCreatorProfilesByIds function to retrieve creator prof…

src/utils/creator-batch.utils.test.ts

@@ -0,0 +1,52 @@
+import { fetchCreatorProfilesByIds, CREATOR_PROFILE_SELECT } from './creator-batch.utils';
+import { prisma } from './prisma.utils';
+
+jest.mock('./prisma.utils', () => ({
+   prisma: {
+      creatorProfile: {
+         findMany: jest.fn(),
+      },
+   },
+}));
+
+const findMany = prisma.creatorProfile.findMany as jest.Mock;
+
+describe('fetchCreatorProfilesByIds', () => {
+   beforeEach(() => {
+      findMany.mockReset();
+   });
+
+   it('returns records in the same order as the input ids and issues one query', async () => {
+      const ids = ['b', 'a', 'c'];
+
+      const createdAt = new Date('2020-01-01T00:00:00.000Z');
+      const updatedAt = new Date('2020-02-01T00:00:00.000Z');
+
+      // return records in a different order to ensure we reorder them
+      findMany.mockResolvedValueOnce([
+         { id: 'a', userId: 'u-a', handle: 'a', displayName: 'A', bio: null, avatarUrl: null, perkSummary: null, isVerified: false, createdAt, updatedAt },
+         { id: 'b', userId: 'u-b', handle: 'b', displayName: 'B', bio: null, avatarUrl: null, perkSummary: null, isVerified: true, createdAt, updatedAt },
+         { id: 'c', userId: 'u-c', handle: 'c', displayName: 'C', bio: null, avatarUrl: null, perkSummary: null, isVerified: false, createdAt, updatedAt },
+      ]);
+
+      const result = await fetchCreatorProfilesByIds(ids);
+
+      expect(findMany).toHaveBeenCalledTimes(1);
+      expect(findMany).toHaveBeenCalledWith({
+         where: { id: { in: ids } },
+         select: CREATOR_PROFILE_SELECT,
+      });
+
+      expect(result.map((r) => (r ? r.id : null))).toEqual(ids);
+   });
+
+   it('returns nulls for missing records preserving order', async () => {
+      const ids = ['x', 'y'];
+      findMany.mockResolvedValueOnce([{ id: 'y', userId: 'u-y', handle: 'y', displayName: 'Y', bio: null, avatarUrl: null, perkSummary: null, isVerified: false, createdAt: new Date(), updatedAt: new Date() }]);
+
+      const result = await fetchCreatorProfilesByIds(ids);
+
+      expect(findMany).toHaveBeenCalledTimes(1);
+      expect(result.map((r) => (r ? r.id : null))).toEqual([null, 'y']);
+   });
+});

src/utils/creator-batch.utils.ts

@@ -0,0 +1,39 @@
+import { prisma } from './prisma.utils';
+import { CreatorProfile } from '../types/profile.types';
+
+// Fields matching the `CreatorProfile` type stored in the DB
+const CREATOR_PROFILE_SELECT = {
+   id: true,
+   userId: true,
+   handle: true,
+   displayName: true,
+   bio: true,
+   avatarUrl: true,
+   perkSummary: true,
+   isVerified: true,
+   createdAt: true,
+   updatedAt: true,
+};
+
+/**
+ * Fetch multiple creator profiles in a single query and return results in the
+ * same order as the provided `ids` array. Missing records are returned as
+ * `null` in their input position.
+ */
+export async function fetchCreatorProfilesByIds(
+   ids: string[]
+): Promise<(CreatorProfile | null)[]> {
+   if (!ids || ids.length === 0) return [];
+
+   const records = await prisma.creatorProfile.findMany({
+      where: { id: { in: ids } },
+      select: CREATOR_PROFILE_SELECT,
+   });
+
+   const map = new Map<string, CreatorProfile>();
+   records.forEach((r) => map.set(r.id, r as CreatorProfile));
+
+   return ids.map((id) => map.get(id) ?? null);
+}
+
+export { CREATOR_PROFILE_SELECT };