Conditional import for server/console only

[jodinathan]

I want to separate client and server logic into different files using conditional imports.

For clients, such as web and mobile, the implementation should use network calls to fetch data from the API (which serves as the backend).
On the other hand, the server should connect directly to the database without relying on an HTTP call.

The goal is to have the same function signature across all platforms:

extension SomeExtension on SomeClass {
  Future<List<User>> getUsers() {}
}

On mobile or web (or Flutter in general), getUsers should make an HTTP request to the API.
When running in a console application (server-side), getUsers should interact directly with the database.

I've experimented with various dart.library.something configurations but haven’t been able to achieve this functionality.

Is this approach feasible?

[dart-github-bot]

Summary: User wants conditional imports to implement platform-specific data fetching (network vs. database) while maintaining a consistent function signature across client and server code. They're seeking guidance on achieving this.

[jodinathan]

just found out how to do it:

export 'stub.dart' 
if (dart.library.html) 'a.dart' 
if (dart.library.ui) 'a.dart' 
if (dart.library.io) 'b.dart';

dart:ui isn't available in console apps, so this works :)

I will leave this open for couple of days if anyone want to comment about the reliability of this approach.

[lrhn]

Conditional imports only work with dart.library.something guards. Having dart:io available and no dart:ui or dart:html is probably a good approach. I'd use dart:js_interop instead of dart:html since web compilation is moving away from dart:html.