Create method to expose selected DbItem

extensions/ql-vscode/src/databases/db-item.ts

@@ -124,3 +124,35 @@ const SelectableDbItemKinds = [
   DbItemKind.RemoteOwner,
   DbItemKind.RemoteRepo,
 ];
+
+export function getSelectedDbItem(dbItems: DbItem[]): DbItem | undefined {
+  for (const dbItem of dbItems) {
+    if (
+      dbItem.kind === DbItemKind.RootRemote ||
+      dbItem.kind === DbItemKind.RootLocal
+    ) {
+      for (const child of dbItem.children) {
+        switch (child.kind) {
+          case DbItemKind.LocalList:
+            for (const database of child.databases) {
+              if (database.selected) {
+                return database;
+              }
+            }
+            break;
+          case DbItemKind.RemoteUserDefinedList:
+            for (const repo of child.repos) {
+              if (repo.selected) {
+                return repo;
+              }
+            }
+            break;
+          default:
+            if (child.selected) {
+              return child;
+            }
+        }
+      }
+    }
+  }
+}

extensions/ql-vscode/src/databases/db-manager.ts

@@ -2,7 +2,7 @@ import { App } from "../common/app";
 import { AppEvent, AppEventEmitter } from "../common/events";
 import { ValueResult } from "../common/value-result";
 import { DbConfigStore } from "./config/db-config-store";
-import { DbItem } from "./db-item";
+import { DbItem, getSelectedDbItem } from "./db-item";
 import { createLocalTree, createRemoteTree } from "./db-tree-creator";
 
 export class DbManager {
@@ -18,6 +18,16 @@ export class DbManager {
     });
   }
 
+  public selectedDbItem(): DbItem | undefined {
+    const dbItems = this.getDbItems();
+
+    if (dbItems.isFailure) {
+      return undefined;
+    }
+
+    return getSelectedDbItem(dbItems.value);
+  }
+
   public getDbItems(): ValueResult<DbItem[]> {
     const configResult = this.dbConfigStore.getConfig();
     if (configResult.isFailure) {