Move read offer to RP (#326)

src/Common/dataAccess/readOfferWithSDK.ts

@@ -0,0 +1,29 @@
+import { HttpHeaders } from "../Constants";
+import { Offer } from "../../Contracts/DataModels";
+import { RequestOptions } from "@azure/cosmos/dist-esm";
+import { client } from "../CosmosClient";
+import { parseSDKOfferResponse } from "../OfferUtility";
+import { readOffers } from "./readOffers";
+
+export const readOfferWithSDK = async (offerId: string, resourceId: string): Promise<Offer> => {
+  if (!offerId) {
+    const offers = await readOffers();
+    const offer = offers.find(offer => offer.resource === resourceId);
+
+    if (!offer) {
+      return undefined;
+    }
+    offerId = offer.id;
+  }
+
+  const options: RequestOptions = {
+    initialHeaders: {
+      [HttpHeaders.populateCollectionThroughputInfo]: true
+    }
+  };
+  const response = await client()
+    .offer(offerId)
+    .read(options);
+
+  return parseSDKOfferResponse(response);
+};