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30 lines
1.1 KiB
30 lines
1.1 KiB
import 'package:flutter/foundation.dart';
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/// Tracks whether the app's storage layer (drift/SQLite) opened successfully at
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/// startup (#385).
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///
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/// When the database can't open — e.g. the native `sqlite3` library fails to
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/// load — every read and write silently fails and the app looks wiped. This
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/// holds that state so the UI can show a loud, persistent warning instead of an
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/// empty, normal-looking screen (SAFELANE §6: no silent failures).
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class StorageHealthService extends ChangeNotifier {
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bool _available = true;
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String? _error;
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/// True until a startup probe proves storage cannot be read/written.
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bool get available => _available;
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/// The underlying error, for the log and diagnostics. Null when healthy.
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String? get error => _error;
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/// Marks storage as unavailable and records [error]. A one-way latch: once
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/// unavailable it stays that way for the session (recovery is a restart), so
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/// a later call is a no-op and does not re-notify.
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void markUnavailable(Object error) {
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if (!_available) return;
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_available = false;
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_error = error.toString();
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notifyListeners();
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}
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}
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