add generic doc getter

Author: NiloCK

packages/db/src/core/interfaces/userDB.ts

@@ -13,7 +13,8 @@ import { DocumentUpdater } from '@db/study';
 /**
  * Read-only user data operations
  */
-export interface UserDBReader extends DocumentUpdater {
+export interface UserDBReader {
+  get<T>(id: string): Promise<T & PouchDB.Core.RevisionIdMeta>;
   getUsername(): string;
   isLoggedIn(): boolean;
 
@@ -71,7 +72,7 @@ export interface UserDBReader extends DocumentUpdater {
 /**
  * User data mutation operations
  */
-export interface UserDBWriter {
+export interface UserDBWriter extends DocumentUpdater {
   /**
    * Update user configuration
    */

packages/db/src/impl/common/BaseUserDB.ts

@@ -217,6 +217,10 @@ Currently logged-in as ${this._username}.`
     return ret;
   }
 
+  public async get<T>(id: string): Promise<T & PouchDB.Core.RevisionIdMeta> {
+    return this.localDB.get<T>(id);
+  }
+
   public update<T extends PouchDB.Core.Document<object>>(id: string, update: Update<T>) {
     return this.updateQueue.update(id, update);
   }