Disallow opening Hidden classes using Open InterSystems Document... command

src/utils/documentPicker.ts

@@ -311,6 +311,8 @@ export async function pickDocument(
 
   return new Promise<string>((resolve) => {
     const quickPick = vscode.window.createQuickPick<DocumentPickerItem>();
+    quickPick.prompt =
+      "Select a package or folder to view its contents. Selecting '..' shows the previous level's contents. You may also type a full document name into the filter box and press 'Enter' to select that document.";
     quickPick.title = `${prompt ? prompt : "Select a document"} ${numberOfSteps ? `(${step}/${numberOfSteps})` : `in namespace '${api.ns}' on server '${api.serverId}'`}`;
     quickPick.ignoreFocusOut = true;
     quickPick.buttons = [
@@ -402,21 +404,47 @@ export async function pickDocument(
             doc.startsWith("%") && doc.split(".").length == 2 && doc.slice(-4) == ".cls"
               ? `%Library.${doc.slice(1)}`
               : doc;
-          api
-            .headDoc(doc)
-            .then(() => resolve(doc))
-            .catch((error) => {
-              vscode.window.showErrorMessage(
-                error?.statusCode == 400
-                  ? `'${doc}' is an invalid document name.`
-                  : error?.statusCode == 404
-                    ? `Document '${doc}' does not exist.`
-                    : `Internal Server Error encountered trying to validate document '${doc}'.`,
-                "Dismiss"
-              );
-              resolve(undefined);
-            })
-            .finally(() => quickPick.hide());
+          if (doc.endsWith(".cls")) {
+            // Use StudioOpenDialog for classes so we don't expose Hidden ones
+            api
+              .actionQuery("SELECT Name, Type FROM %Library.RoutineMgr_StudioOpenDialog(?,1,1,1,1,0,1,,0,1)", [doc])
+              .then((data) => {
+                if (data.result.content?.length) {
+                  // doc is the name of a class that exists and is visible by the user
+                  resolve(doc);
+                } else {
+                  vscode.window.showErrorMessage(
+                    `Class '${doc.slice(0, -4)}' does not exist, or is Hidden.`,
+                    "Dismiss"
+                  );
+                  resolve(undefined);
+                }
+              })
+              .catch(() => {
+                vscode.window.showErrorMessage(
+                  `Internal Server Error encountered trying to validate class name '${doc.slice(0, -4)}'.`,
+                  "Dismiss"
+                );
+                resolve(undefined);
+              })
+              .finally(() => quickPick.hide());
+          } else {
+            api
+              .headDoc(doc)
+              .then(() => resolve(doc))
+              .catch((error) => {
+                vscode.window.showErrorMessage(
+                  error?.statusCode == 400
+                    ? `'${doc}' is an invalid document name.`
+                    : error?.statusCode == 404
+                      ? `Document '${doc}' does not exist.`
+                      : `Internal Server Error encountered trying to validate document '${doc}'.`,
+                  "Dismiss"
+                );
+                resolve(undefined);
+              })
+              .finally(() => quickPick.hide());
+          }
         } else {
           // The document name came from an item so no validation is required
           resolve(doc);