Migrated Hosted Explorer to React (#360)

Co-authored-by: Victor Meng <vimeng@microsoft.com>
Co-authored-by: Steve Faulkner <stfaul@microsoft.com>

src/Platform/Hosted/Helpers/ResourceTokenUtils.ts

@@ -0,0 +1,43 @@
+export interface ParsedResourceTokenConnectionString {
+  accountEndpoint: string;
+  collectionId: string;
+  databaseId: string;
+  partitionKey?: string;
+  resourceToken: string;
+}
+
+export function parseResourceTokenConnectionString(connectionString: string): ParsedResourceTokenConnectionString {
+  let accountEndpoint: string;
+  let collectionId: string;
+  let databaseId: string;
+  let partitionKey: string;
+  let resourceToken: string;
+  const connectionStringParts = connectionString.split(";");
+  connectionStringParts.forEach((part: string) => {
+    if (part.startsWith("type=resource")) {
+      resourceToken = part + ";";
+    } else if (part.startsWith("AccountEndpoint=")) {
+      accountEndpoint = part.substring(16);
+    } else if (part.startsWith("DatabaseId=")) {
+      databaseId = part.substring(11);
+    } else if (part.startsWith("CollectionId=")) {
+      collectionId = part.substring(13);
+    } else if (part.startsWith("PartitionKey=")) {
+      partitionKey = part.substring(13);
+    } else if (part !== "") {
+      resourceToken += part + ";";
+    }
+  });
+
+  return {
+    accountEndpoint,
+    collectionId,
+    databaseId,
+    partitionKey,
+    resourceToken
+  };
+}
+
+export function isResourceTokenConnectionString(connectionString: string): boolean {
+  return connectionString && connectionString.includes("type=resource");
+}