Introduce new dialog box with "No, never ask me again" option

extensions/ql-vscode/src/helpers.ts

@@ -256,6 +256,46 @@ export function isWorkspaceFolderOnDisk(
   return workspaceFolder.uri.scheme === "file";
 }
 
+/**
+ * Opens a modal dialog for the user to make a choice between yes/no/never be asked again.
+ *
+ * @param message The message to show.
+ * @param modal If true (the default), show a modal dialog box, otherwise dialog is non-modal and can
+ *        be closed even if the user does not make a choice.
+ * @param yesTitle The text in the box indicating the affirmative choice.
+ * @param noTitle The text in the box indicating the negative choice.
+ * @param neverTitle The text in the box indicating the opt out choice.
+ *
+ * @return
+ *  `Yes` if the user clicks 'Yes',
+ *  `No` if the user clicks 'No' or cancels the dialog,
+ *  `No, and never ask me again` if the user clicks 'No, and never ask me again',
+ *  `undefined` if the dialog is closed without the user making a choice.
+ */
+export async function showNeverAskAgainDialog(
+  message: string,
+  modal = true,
+  yesTitle = "Yes",
+  noTitle = "No",
+  neverAskAgainTitle = "No, and never ask me again",
+): Promise<string | undefined> {
+  const yesItem = { title: yesTitle, isCloseAffordance: true };
+  const noItem = { title: noTitle, isCloseAffordance: false };
+  const neverAskAgainItem = {
+    title: neverAskAgainTitle,
+    isCloseAffordance: false,
+  };
+  const chosenItem = await Window.showInformationMessage(
+    message,
+    { modal },
+    yesItem,
+    noItem,
+    neverAskAgainItem,
+  );
+
+  return chosenItem?.title;
+}
+
 /** Gets all active workspace folders that are on the filesystem. */
 export function getOnDiskWorkspaceFoldersObjects() {
   const workspaceFolders = workspace.workspaceFolders ?? [];

extensions/ql-vscode/test/vscode-tests/no-workspace/helpers.test.ts

@@ -36,6 +36,7 @@ import {
   showBinaryChoiceDialog,
   showBinaryChoiceWithUrlDialog,
   showInformationMessageWithAction,
+  showNeverAskAgainDialog,
   walkDirectory,
 } from "../../../src/helpers";
 import { reportStreamProgress } from "../../../src/progress";
@@ -528,6 +529,53 @@ describe("helpers", () => {
       expect(showInformationMessageSpy).toHaveBeenCalledTimes(5);
     });
   });
+
+  describe("showNeverAskAgainDialog", () => {
+    let showInformationMessageSpy: jest.SpiedFunction<
+      typeof window.showInformationMessage
+    >;
+
+    beforeEach(() => {
+      showInformationMessageSpy = jest
+        .spyOn(window, "showInformationMessage")
+        .mockResolvedValue(undefined);
+    });
+
+    const resolveArg =
+      (index: number) =>
+      (...args: any[]) =>
+        Promise.resolve(args[index]);
+
+    const title =
+      "We've noticed you don't have a CodeQL pack available to analyze this database. Can we set up a query pack for you?";
+
+    it("should show a binary choice dialog and return `Yes`", async () => {
+      // pretend user chooses 'Yes'
+      const yesItem = resolveArg(2);
+      showInformationMessageSpy.mockImplementationOnce(yesItem);
+
+      const answer = await showNeverAskAgainDialog(title);
+      expect(answer).toBe("Yes");
+    });
+
+    it("should show a binary choice dialog and return `No`", async () => {
+      // pretend user chooses 'No'
+      const noItem = resolveArg(3);
+      showInformationMessageSpy.mockImplementationOnce(noItem);
+
+      const answer = await showNeverAskAgainDialog(title);
+      expect(answer).toBe("No");
+    });
+
+    it("should show a binary choice dialog and return `No, and never ask me again`", async () => {
+      // pretend user chooses 'No, and never ask me again'
+      const neverAskAgainItem = resolveArg(4);
+      showInformationMessageSpy.mockImplementationOnce(neverAskAgainItem);
+
+      const answer = await showNeverAskAgainDialog(title);
+      expect(answer).toBe("No, and never ask me again");
+    });
+  });
 });
 
 describe("walkDirectory", () => {