Pinning Notebooks on Notebooks view (#11963)

* initial commit

* added tests

* code cleanup and more tests

* add missed util test

* changes to address comments

* remove pin from resources

extensions/notebook/src/common/utils.ts

@@ -9,7 +9,7 @@ import * as nls from 'vscode-nls';
 import * as vscode from 'vscode';
 import * as azdata from 'azdata';
 import * as crypto from 'crypto';
-import { notebookLanguages } from './constants';
+import { notebookLanguages, notebookConfigKey, pinnedBooksConfigKey } from './constants';
 
 const localize = nls.loadMessageBundle();
 
@@ -323,3 +323,18 @@ export async function getRandomToken(size: number = 24): Promise<string> {
 		});
 	});
 }
+
+export function isBookItemPinned(notebookPath: string): boolean {
+	let pinnedNotebooks: string[] = getPinnedNotebooks();
+	if (pinnedNotebooks?.indexOf(notebookPath) > -1) {
+		return true;
+	}
+	return false;
+}
+
+export function getPinnedNotebooks(): string[] {
+	let config: vscode.WorkspaceConfiguration = vscode.workspace.getConfiguration(notebookConfigKey);
+	let pinnedNotebooks: string[] = config.get(pinnedBooksConfigKey) ?? [];
+
+	return pinnedNotebooks;
+}