feat: persistent session drawer order via SharedPreferences

Matthias Nott

2026-03-24 e76a5e274204ced68e3bc6e8b8ccf0c65517035d

 lib/screens/chat_screen.dart
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@@ -59,6 +59,7 @@
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   bool _sessionReady = false;
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   final List<Map<String, dynamic>> _pendingMessages = [];
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   final Map<String, List<Message>> _catchUpPending = {};
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+  List<String>? _cachedSessionOrder;
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   @override
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   void initState() {
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@@ -72,7 +73,8 @@
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     // Load persisted state BEFORE connecting
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     final prefs = await SharedPreferences.getInstance();
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     _lastSeq = prefs.getInt('lastSeq') ?? 0;
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-    // Restore last active session so catch_up routes to the right session
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+    // Restore saved session order and active session
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+    _cachedSessionOrder = prefs.getStringList('sessionOrder');
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     final savedSessionId = prefs.getString('activeSessionId');
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     if (savedSessionId != null && mounted) {
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       ref.read(activeSessionIdProvider.notifier).state = savedSessionId;
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@@ -364,9 +366,11 @@
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     final sessionsJson = msg['sessions'] as List<dynamic>?;
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     if (sessionsJson == null) return;
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-    final sessions = sessionsJson
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+    var sessions = sessionsJson
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         .map((s) => Session.fromJson(s as Map<String, dynamic>))
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         .toList();
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+    // Apply saved custom order (reordered sessions persist across updates)
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+    sessions = _applyCustomOrder(sessions);
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     ref.read(sessionsProvider.notifier).state = sessions;
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     final activeId = ref.read(activeSessionIdProvider);
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@@ -1242,6 +1246,28 @@
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     final item = sessions.removeAt(oldIndex);
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     sessions.insert(newIndex, item);
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     ref.read(sessionsProvider.notifier).state = sessions;
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+    // Persist custom order
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+    _saveSessionOrder(sessions.map((s) => s.id).toList());
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+  }
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+
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+  void _saveSessionOrder(List<String> ids) {
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+    SharedPreferences.getInstance().then((p) => p.setStringList('sessionOrder', ids));
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+  }
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+
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+  /// Apply saved custom order to a server-provided session list.
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+  /// New sessions (not in saved order) are appended at the end.
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+  List<Session> _applyCustomOrder(List<Session> sessions) {
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+    if (_cachedSessionOrder == null || _cachedSessionOrder!.isEmpty) return sessions;
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+    final order = _cachedSessionOrder!;
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+    final byId = {for (final s in sessions) s.id: s};
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+    final ordered = <Session>[];
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+    for (final id in order) {
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+      final s = byId.remove(id);
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+      if (s != null) ordered.add(s);
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+    }
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+    // Append any new sessions not in saved order
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+    ordered.addAll(byId.values);
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+    return ordered;
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   }
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   void _refreshSessions() {