Implement Sample data import for Fabric Home (#2101)

* Implement dialog to import sample data

* Fix format

* Cosmetic fixes

* fix: update help link to point to the new documentation URL

---------

Co-authored-by: Sevo Kukol <sevoku@microsoft.com>

src/Explorer/SplashScreen/SampleUtil.ts

@@ -0,0 +1,56 @@
+import { createCollection } from "Common/dataAccess/createCollection";
+import Explorer from "Explorer/Explorer";
+import { useDatabases } from "Explorer/useDatabases";
+import * as DataModels from "../../Contracts/DataModels";
+import * as ViewModels from "../../Contracts/ViewModels";
+
+/**
+ * Public for unit tests
+ * @param databaseName
+ * @param containerName
+ * @param containerDatabases
+ */
+const hasContainer = (
+  databaseName: string,
+  containerName: string,
+  containerDatabases: ViewModels.Database[],
+): boolean => {
+  const filteredDatabases = containerDatabases.filter((database) => database.id() === databaseName);
+  return (
+    filteredDatabases.length > 0 &&
+    filteredDatabases[0].collections().filter((collection) => collection.id() === containerName).length > 0
+  );
+};
+
+export const checkContainerExists = (databaseName: string, containerName: string) =>
+  hasContainer(databaseName, containerName, useDatabases.getState().databases);
+
+export const createContainer = async (
+  databaseName: string,
+  containerName: string,
+  explorer: Explorer,
+): Promise<ViewModels.Collection> => {
+  const createRequest: DataModels.CreateCollectionParams = {
+    createNewDatabase: false,
+    collectionId: containerName,
+    databaseId: databaseName,
+    databaseLevelThroughput: false,
+  };
+  await createCollection(createRequest);
+  await explorer.refreshAllDatabases();
+  const database = useDatabases.getState().findDatabaseWithId(databaseName);
+  if (!database) {
+    return undefined;
+  }
+  await database.loadCollections();
+  const newCollection = database.findCollectionWithId(containerName);
+  return newCollection;
+};
+
+export const importData = async (collection: ViewModels.Collection): Promise<void> => {
+  // TODO: keep same chunk as ContainerSampleGenerator
+  const dataFileContent = await import(
+    /* webpackChunkName: "queryCopilotSampleData" */ "../../../sampleData/queryCopilotSampleData.json"
+  );
+  await collection.bulkInsertDocuments(dataFileContent.data);
+};