chore: support undefined db/connection (#543)

support undefined db/connection

Author: lerouxb

packages/mongodb-ts-autocomplete/src/autocompleter.spec.ts

@@ -51,9 +51,7 @@ describe('MongoDBAutocompleter', function () {
 
   it('deals with no connection', async function () {
     autocompleterContext.currentDatabaseAndConnection = () => {
-      const error = new Error('No connection');
-      error.name = 'MongoshInvalidInputError';
-      throw error;
+      return undefined;
     };
 
     const completions = await autocompleter.autocomplete('db.');

packages/mongodb-ts-autocomplete/src/autocompleter.ts

@@ -202,22 +202,15 @@ declare global {
   }
 
   async autocomplete(code: string): Promise<AutoCompletion[]> {
-    let connectionId: string;
-    let databaseName: string;
-
-    // If there's no known connection, currentDatabaseAndConnection() will
-    // error, but we won't be able to generate types for a connection, db
-    // object, etc, anyway. So just return no results in that case.
-    try {
-      ({ connectionId, databaseName } =
-        this.context.currentDatabaseAndConnection());
-    } catch (err: any) {
-      if (err.name === 'MongoshInvalidInputError') {
-        return [];
-      }
-      throw err;
+    // If there's no known connection we won't be able to generate types for a
+    // connection, db object, etc. So just return no results in that case.
+    const dbAndConnection = this.context.currentDatabaseAndConnection();
+    if (!dbAndConnection) {
+      return [];
     }
 
+    const { connectionId, databaseName } = dbAndConnection;
+
     const tsAst = compileSourceFile(code);
     const collectionName = inferCollectionNameFromFunctionCall(tsAst) || 'test';
 

packages/mongodb-ts-autocomplete/src/autocompletion-context.ts

@@ -9,10 +9,12 @@ type CacheOptions = {
 };
 
 export interface AutocompletionContext {
-  currentDatabaseAndConnection(): {
-    connectionId: string;
-    databaseName: string;
-  };
+  currentDatabaseAndConnection():
+    | {
+        connectionId: string;
+        databaseName: string;
+      }
+    | undefined;
   databasesForConnection(connectionId: string): Promise<string[]>;
   collectionsForDatabase(
     connectionId: string,