load method

@override Future<CustomLocalization> load(Locale locale)

Start loading the resources for locale. The returned future completes when the resources have finished loading.

It's assumed that this method will return an object that contains a collection of related string resources (typically defined with one method per resource). The object will be retrieved with Localizations.of.

Implementation

@override
Future<CustomLocalization> load(Locale locale) async {
  try {
    String language = locale.languageCode;
    developer.log(
      'Loading localization for language: $language',
      name: 'CustomLocalization',
    );

    String json = await rootBundle.loadString("lib/l10n/$filePrefix$language.arb");

    Map<String, dynamic> decoded;
    try {
      decoded = jsonDecode(json);
    } catch (e) {
      developer.log(
        'Failed to parse JSON for locale $language',
        name: 'CustomLocalization',
        error: e,
      );
      rethrow;
    }

    // Filter out metadata entries (keys starting with @) and ensure string values
    Map<String, String> entries = {};
    int skippedEntries = 0;

    decoded.forEach((key, value) {
      if (key.startsWith('@')) {
        // Skip metadata entries
        return;
      }

      if (value is String) {
        entries[key] = value;
      } else {
        skippedEntries++;
        developer.log(
          'Skipped non-string value for key "$key" (type: ${value.runtimeType})',
          name: 'CustomLocalization',
        );
      }
    });

    developer.log(
      'Loaded ${entries.length} translations for $language${skippedEntries > 0 ? " ($skippedEntries entries skipped)" : ""}',
      name: 'CustomLocalization',
    );

    return CustomLocalization(entries);
  } catch (e, stackTrace) {
    developer.log(
      'Failed to load custom localization for locale ${locale.languageCode}',
      name: 'CustomLocalization',
      error: e,
      stackTrace: stackTrace,
    );

    // Return empty localization as fallback to prevent app crash
    developer.log(
      'Returning empty localization as fallback',
      name: 'CustomLocalization',
    );
    return CustomLocalization({});
  }
}