Lazy load database offer in data explorer (#208)

Co-authored-by: zfoster <notzachfoster@gmail.com>

src/Common/dataAccess/readDatabaseOffer.ts

@@ -0,0 +1,83 @@
+import * as DataModels from "../../Contracts/DataModels";
+import { AuthType } from "../../AuthType";
+import { DefaultAccountExperienceType } from "../../DefaultAccountExperienceType";
+import { HttpHeaders } from "../Constants";
+import { RequestOptions } from "@azure/cosmos/dist-esm";
+import { client } from "../CosmosClient";
+import { getSqlDatabaseThroughput } from "../../Utils/arm/generatedClients/2020-04-01/sqlResources";
+import { getMongoDBDatabaseThroughput } from "../../Utils/arm/generatedClients/2020-04-01/mongoDBResources";
+import { getCassandraKeyspaceThroughput } from "../../Utils/arm/generatedClients/2020-04-01/cassandraResources";
+import { getGremlinDatabaseThroughput } from "../../Utils/arm/generatedClients/2020-04-01/gremlinResources";
+import { readOffers } from "./readOffers";
+import { userContext } from "../../UserContext";
+
+export const readDatabaseOffer = async (
+  params: DataModels.ReadDatabaseOfferParams
+): Promise<DataModels.OfferWithHeaders> => {
+  let offerId = params.offerId;
+  if (!offerId) {
+    if (window.authType === AuthType.AAD && !userContext.useSDKOperations) {
+      try {
+        offerId = await getDatabaseOfferIdWithARM(params.databaseId);
+      } catch (error) {
+        if (error.code !== "NotFound") {
+          throw new Error(error);
+        }
+        return undefined;
+      }
+    } else {
+      offerId = await getDatabaseOfferIdWithSDK(params.databaseResourceId, params.isServerless);
+      if (!offerId) {
+        return undefined;
+      }
+    }
+  }
+
+  const options: RequestOptions = {
+    initialHeaders: {
+      [HttpHeaders.populateCollectionThroughputInfo]: true
+    }
+  };
+
+  const response = await client()
+    .offer(offerId)
+    .read(options);
+  return (
+    response && {
+      ...response.resource,
+      headers: response.headers
+    }
+  );
+};
+
+const getDatabaseOfferIdWithARM = async (databaseId: string): Promise<string> => {
+  let rpResponse;
+  const subscriptionId = userContext.subscriptionId;
+  const resourceGroup = userContext.resourceGroup;
+  const accountName = userContext.databaseAccount.name;
+  const defaultExperience = userContext.defaultExperience;
+  switch (defaultExperience) {
+    case DefaultAccountExperienceType.DocumentDB:
+      rpResponse = await getSqlDatabaseThroughput(subscriptionId, resourceGroup, accountName, databaseId);
+      break;
+    case DefaultAccountExperienceType.MongoDB:
+      rpResponse = await getMongoDBDatabaseThroughput(subscriptionId, resourceGroup, accountName, databaseId);
+      break;
+    case DefaultAccountExperienceType.Cassandra:
+      rpResponse = await getCassandraKeyspaceThroughput(subscriptionId, resourceGroup, accountName, databaseId);
+      break;
+    case DefaultAccountExperienceType.Graph:
+      rpResponse = await getGremlinDatabaseThroughput(subscriptionId, resourceGroup, accountName, databaseId);
+      break;
+    default:
+      throw new Error(`Unsupported default experience type: ${defaultExperience}`);
+  }
+
+  return rpResponse?.name;
+};
+
+const getDatabaseOfferIdWithSDK = async (databaseResourceId: string, isServerless: boolean): Promise<string> => {
+  const offers = await readOffers(isServerless);
+  const offer = offers.find(offer => offer.resource === databaseResourceId);
+  return offer?.id;
+};