pos changes

lib/data/local/session_store.dart

@@ -1,81 +0,0 @@
-import 'dart:convert';
-
-import 'package:flutter/foundation.dart';
-import 'package:flutter_secure_storage/flutter_secure_storage.dart';
-
-import '../../domain/entities/pos_session.dart';
-
-/// Keeps a terminal signed in across restarts.
-///
-/// A till is not a browser. It signs in when a shop opens and bills for the
-/// whole trading day, often on a connection that comes and goes, and it must
-/// survive being rebooted mid-shift without a queue of customers waiting while
-/// somebody finds the manager's password.
-///
-/// The whole session goes to the platform keystore rather than to SQLite. The
-/// token is a bearer credential — anything holding it can bill as this shop —
-/// and SQLite here is a file on a machine behind a shop counter, readable by
-/// anything that can open it. The rest of the session travels with the token
-/// because splitting them invites the two halves to disagree about which outlet
-/// this terminal is.
-class SessionStore {
-  SessionStore({FlutterSecureStorage? secureStorage})
-      : _secure = secureStorage ?? const FlutterSecureStorage();
-
-  final FlutterSecureStorage _secure;
-
-  static const _key = 'pos.session';
-
-  /// Reads the saved session, or null when there is none worth using.
-  ///
-  /// An expired session is treated as absent rather than returned for the
-  /// caller to check. Every caller would have to make the same check, and the
-  /// one that forgot would send a dead token all day and read the resulting
-  /// 401s as a server fault.
-  Future<PosSession?> read({DateTime? now}) async {
-    final String? raw;
-    try {
-      raw = await _secure.read(key: _key);
-    } on Object catch (e) {
-      // No keystore — a headless test host, or a Linux box with no secret
-      // service. Signing in again is the safe way to fail.
-      debugPrint('Secure storage unavailable, session not loaded: $e');
-      return null;
-    }
-
-    if (raw == null || raw.isEmpty) return null;
-
-    try {
-      final session =
-          PosSession.fromJson(jsonDecode(raw) as Map<String, Object?>);
-      if (!session.isValidAt(now ?? DateTime.now())) return null;
-      if (session.token.isEmpty || session.locationId <= 0) return null;
-      return session;
-    } on Object catch (e) {
-      // A stored session this build cannot parse — most likely written by an
-      // older one. Dropped rather than repaired: a half-understood session is
-      // worse than none, and re-authenticating costs one screen.
-      debugPrint('Stored session could not be read, discarding: $e');
-      return null;
-    }
-  }
-
-  Future<void> write(PosSession session) async {
-    try {
-      await _secure.write(key: _key, value: jsonEncode(session.toJson()));
-    } on Object catch (e) {
-      // The terminal keeps working on the session it holds in memory; it just
-      // will not survive a restart. Failing the sign-in over this would close a
-      // shop for a keystore problem.
-      debugPrint('Could not persist the session: $e');
-    }
-  }
-
-  Future<void> clear() async {
-    try {
-      await _secure.delete(key: _key);
-    } on Object catch (e) {
-      debugPrint('Could not clear the session: $e');
-    }
-  }
-}