added mappers, updated models

app/server/graphql/resolvers/mappers/reviewMapper.ts

@@ -0,0 +1,24 @@
+import { Review } from '@prisma/client';
+import { Review as ReviewSchema } from '@generated/types';
+import { toUserSchema } from './userMapper';
+import { call } from '@app/common';
+import { prisma } from '@app/server/prisma/client';
+
+export async function toReviewSchema(model: Review): Promise<ReviewSchema> {
+  return {
+    id: model.id,
+    author: await call(async () => {
+      const userModel = await prisma.user.findUniqueOrThrow({
+        where: {
+          id: model.userId
+        }
+      });
+      return toUserSchema(userModel);
+    }),
+    text: model.text,
+    //todo: ratings implementation
+    ratingTotal: await call(async () => {
+      return 0;
+    })
+  };
+}