Add UUID helpers to the SDK (#14939)

* Add UUID helpers to the SDK

* Address review feedback

Author: Hinton

libs/common/src/platform/abstractions/sdk/sdk.service.ts

@@ -1,16 +1,41 @@
 import { Observable } from "rxjs";
 
-import { BitwardenClient } from "@bitwarden/sdk-internal";
+import { BitwardenClient, Uuid } from "@bitwarden/sdk-internal";
 
 import { UserId } from "../../../types/guid";
 import { Rc } from "../../misc/reference-counting/rc";
+import { Utils } from "../../misc/utils";
 
 export class UserNotLoggedInError extends Error {
   constructor(userId: UserId) {
     super(`User (${userId}) is not logged in`);
   }
 }
 
+export class InvalidUuid extends Error {
+  constructor(uuid: string) {
+    super(`Invalid UUID: ${uuid}`);
+  }
+}
+
+/**
+ * Converts a string to UUID. Will throw an error if the UUID is non valid.
+ */
+export function asUuid<T extends Uuid>(uuid: string): T {
+  if (Utils.isGuid(uuid)) {
+    return uuid as T;
+  }
+
+  throw new InvalidUuid(uuid);
+}
+
+/**
+ * Converts a UUID to the string representation.
+ */
+export function uuidToString<T extends Uuid>(uuid: T): string {
+  return uuid as unknown as string;
+}
+
 export abstract class SdkService {
   /**
    * Retrieve the version of the SDK.