ensemble_remote_config 1.2.55

Firebase Remote Config integration for Ensemble apps, including typed value lookup, refresh, defaults, and runtime diagnostics.

Ensemble Remote Config

Ensemble module for Firebase Remote Config. Use it for A/B testing, feature flags, and runtime configuration in screens and expressions.

What it does

• Fetches and activates Remote Config in the background when the module is registered.
• Exposes Remote Config on the ensemble object like storage: ensemble.remoteConfig.my_key (or ensemble.remoteConfig.get('key', 'default') for a custom default).

Enabling the module

Remote Config is off by default. To turn it on:

1. Starter pubspec.yaml
   Uncomment the dependency:

   ensemble_remote_config:
     git:
       url: https://github.com/EnsembleUI/ensemble.git
       ref: <ensemble-version>
       path: modules/ensemble_remote_config
   

2. Starter lib/generated/ensemble_modules.dart

   • Set useRemoteConfig = true.
   • Uncomment: import 'package:ensemble_remote_config/remote_config.dart';
   • Uncomment: GetIt.I.registerSingleton<RemoteConfig>(RemoteConfigImpl());

3. Firebase
   Ensure Firebase is set up (e.g. GoogleService-Info.plist / google-services.json). With useRemoteConfig = true, Firebase.initializeApp() is already triggered by the starter’s init.

Optional environment variables

You can tune Remote Config fetch behavior via environment variables:

• remote_config_fetch_timeout — fetch timeout in seconds (default 10).
• remote_config_minimum_fetch_interval — minimum fetch interval in seconds (default 3600, i.e. 1 hour).

Example:

environmentVariables:
  remote_config_fetch_timeout: 10
  remote_config_minimum_fetch_interval: 3600

Notes:

• These values are applied when Remote Config is initialized and before each subsequent fetchAndActivate() / ensemble.remoteConfig.refresh().
• On the very first app start, Ensemble config may not be loaded yet when RC initializes, so the defaults can be used for the first fetch; any later call to ensemble.remoteConfig.refresh() re-reads and reapplies the env values.
• For local debugging you can temporarily set remote_config_minimum_fetch_interval: 0 to avoid throttling, but you should use a higher value in production.

Usage in YAML

In any screen or expression, use the ensemble object

• Property access — ensemble.remoteConfig.my_key returns a minimally typed value
  • "true"/"false" → bool
  • numeric string → num
  • otherwise a String (or null if the key is missing/empty).
• Custom default and type — ensemble.remoteConfig.get('my_key', false) uses the default's type (here bool) and falls back to that default on errors.
• Typed helpers — these are just wrappers around get with a typed default:
  • ensemble.remoteConfig.getBool('flag', false)
  • ensemble.remoteConfig.getInt('max_items', 10)
  • ensemble.remoteConfig.getDouble('ratio', 0.5)
  • ensemble.remoteConfig.getString('cta_text', 'Try it now')

Defaults

• ensemble.remoteConfig.setDefaults({ flag: true, max_items: 10 }) registers app‑side defaults with Firebase Remote Config.
• Intended use: call once during app startup before the screens that depend on these keys are built.
• Changing defaults at runtime does not automatically update existing widgets; you may need to rebuild the screen or navigate away/back to see the new default take effect.

Debug helpers

For debugging and introspection (e.g. a developer screen):

• ensemble.remoteConfig.all() → map of all keys to their current values.
• ensemble.remoteConfig.info() → metadata such as initialized, lastFetchStatus, lastFetchTime, and fetch/interval settings.
• ensemble.remoteConfig.refresh() → manually trigger a re‑fetch/activate of Remote Config values (using Firebase's built‑in throttling and current env settings for timeout/interval).

Debug logging

In debug builds, the module logs to debugPrint when:

• Fetch/activate fails (with exception and stack).
• getValue returns the default because the service isn’t initialized, the key is empty, or an error occurred.