feat: Implement caching for selectable products and enhance product filtering in admin panels

flutter/lib/features/admin/presentation/admin_pantry_panel.dart

@@ -7,6 +7,7 @@ import '../../../core/l10n/l10n.dart';
 import '../../../core/ui/category_then_product_picker.dart';
 import '../../../core/ui/searchable_category_field.dart';
 import '../../../core/ui/product_picker_field.dart';
+import 'admin_form_shared.dart';
 import '../data/admin_repository.dart';
 import '../domain/admin_category_node.dart';
 import '../domain/admin_pantry_item.dart';
@@ -30,7 +31,6 @@ class _AdminPantryPanelState extends ConsumerState<AdminPantryPanel> {
   List<AdminPantryItem> _items = [];
   List<AdminProduct> _products = [];
   List<AdminCategoryNode> _categories = [];
-  List<CategorySelectOption> _categoryOptions = [];
   List<UserAdmin> _users = [];
 
   @override
@@ -48,7 +48,7 @@ class _AdminPantryPanelState extends ConsumerState<AdminPantryPanel> {
     try {
       final results = await Future.wait<dynamic>([
         ref.read(adminRepositoryProvider).listAdminPantry(userId: _selectedUserId),
-        ref.read(adminRepositoryProvider).listGlobalProducts(),
+        ref.read(adminRepositoryProvider).listSelectableProductsForAdmin(),
         ref.read(adminRepositoryProvider).listCategoryTree(),
         ref.read(adminRepositoryProvider).listUsers(),
       ]);
@@ -57,7 +57,6 @@ class _AdminPantryPanelState extends ConsumerState<AdminPantryPanel> {
         _items = results[0] as List<AdminPantryItem>;
         _products = results[1] as List<AdminProduct>;
         _categories = results[2] as List<AdminCategoryNode>;
-        _categoryOptions = _flattenCategoryOptions(_categories);
         _users = results[3] as List<UserAdmin>;
       });
     } catch (e) {
@@ -80,18 +79,8 @@ class _AdminPantryPanelState extends ConsumerState<AdminPantryPanel> {
     }).toList();
   }
 
-  List<CategorySelectOption> _flattenCategoryOptions(
-    List<AdminCategoryNode> nodes, [
-    List<String> parents = const [],
-  ]) {
-    final result = <CategorySelectOption>[];
-    for (final node in nodes) {
-      final pathParts = [...parents, node.name];
-      final path = pathParts.join(' > ');
-      result.add((value: node.id.toString(), label: path));
-      result.addAll(_flattenCategoryOptions(node.children, pathParts));
-    }
-    return result;
+  List<String> get _locationOptions {
+    return buildLocationOptionsFromValues(_items.map((item) => item.location));
   }
 
   Future<void> _addItem() async {
@@ -152,6 +141,7 @@ class _AdminPantryPanelState extends ConsumerState<AdminPantryPanel> {
         users: _users,
         products: _products,
         categories: _categories,
+        locationOptions: _locationOptions,
         initial: initial,
         initialOwnerUserId: initialOwnerUserId,
       ),
@@ -427,11 +417,15 @@ class _AdminPantryPanelState extends ConsumerState<AdminPantryPanel> {
                   itemBuilder: (context, index) {
                     final item = filtered[index];
                     return ListTile(
-                      title: Text(item.displayName),
+                      title: Row(
+                        children: [
+                          Expanded(child: Text(item.displayName)),
+                          buildCategoryPathChip(item.categoryPath),
+                        ],
+                      ),
                       subtitle: Text(
                         '${item.username} (${item.userEmail})'
-                        '${item.location == null || item.location!.trim().isEmpty ? '' : ' · ${item.location}'}'
-                        '${item.categoryPath == null || item.categoryPath!.trim().isEmpty ? '' : ' · ${item.categoryPath}'}',
+                        '${item.location == null || item.location!.trim().isEmpty ? '' : ' · ${item.location}'}',
                       ),
                       trailing: Row(
                         mainAxisSize: MainAxisSize.min,
@@ -489,6 +483,7 @@ class _PantryFormDialog extends StatefulWidget {
   final List<UserAdmin> users;
   final List<AdminProduct> products;
   final List<AdminCategoryNode> categories;
+  final List<String> locationOptions;
   final AdminPantryItem? initial;
   final int? initialOwnerUserId;
 
@@ -496,6 +491,7 @@ class _PantryFormDialog extends StatefulWidget {
     required this.users,
     required this.products,
     required this.categories,
+    required this.locationOptions,
     this.initial,
     this.initialOwnerUserId,
   });
@@ -505,6 +501,8 @@ class _PantryFormDialog extends StatefulWidget {
 }
 
 class _PantryFormDialogState extends State<_PantryFormDialog> {
+  static const String _manualLocationValue = '__manual_location__';
+
   late final TextEditingController _locationController;
   late final TextEditingController _categorySearchController;
   late List<CategorySelectOption> _categoryOptions;
@@ -514,6 +512,8 @@ class _PantryFormDialogState extends State<_PantryFormDialog> {
   int? _categoryId;
   String? _categoryPath;
   String? _productErrorText;
+  bool _useManualLocation = false;
+  ProductScopeFilter _productScopeFilter = ProductScopeFilter.globalOnly;
 
   @override
   void initState() {
@@ -527,6 +527,9 @@ class _PantryFormDialogState extends State<_PantryFormDialog> {
     _locationController = TextEditingController(text: initial?.location ?? '');
     _categorySearchController = TextEditingController(text: _categoryPath ?? '');
     _categoryOptions = _flattenCategoryOptions(widget.categories);
+    final initialLocation = _locationController.text.trim();
+    _useManualLocation = initialLocation.isNotEmpty &&
+      !widget.locationOptions.contains(initialLocation);
   }
 
   @override
@@ -555,18 +558,39 @@ class _PantryFormDialogState extends State<_PantryFormDialog> {
     for (final product in widget.products) {
       if (product.id == id) return product;
     }
+    final initial = widget.initial;
+    if (initial != null && initial.productId == id) {
+      return AdminProduct(
+        id: initial.productId,
+        name: initial.productName,
+        canonicalName: initial.productCanonicalName,
+        ownerId: initial.userId,
+        categoryId: initial.categoryId,
+        categoryPath: initial.categoryPath,
+        status: 'private',
+      );
+    }
     return null;
   }
 
   List<ProductOption> _productOptions() {
-    final source = _categoryId == null
-        ? widget.products
-        : widget.products.where((p) => p.categoryId == _categoryId).toList();
-    final sorted = [...source]
-      ..sort((a, b) => a.displayName.toLowerCase().compareTo(b.displayName.toLowerCase()));
-    return sorted
-        .map((p) => (id: p.id, name: p.displayName, categoryId: p.categoryId))
-        .toList();
+    final filtered = filterSelectableAdminProducts(
+      products: widget.products,
+      ownerUserId: _ownerUserId,
+      categoryId: _categoryId,
+      scopeFilter: _productScopeFilter,
+      selectedProduct: _productById(_productId),
+    );
+    return toProductOptions(filtered);
+  }
+
+  String? _locationDropdownValue() {
+    return resolveLocationDropdownValue(
+      useManualLocation: _useManualLocation,
+      currentValue: _locationController.text,
+      options: widget.locationOptions,
+      manualLocationValue: _manualLocationValue,
+    );
   }
 
   List<CategorySelectOption> _flattenCategoryOptions(
@@ -616,11 +640,25 @@ class _PantryFormDialogState extends State<_PantryFormDialog> {
                             ),
                           ))
                       .toList(),
-                  onChanged: (value) => setState(() => _ownerUserId = value),
+                  onChanged: (value) => setState(() {
+                    _ownerUserId = value;
+                    if (value == null) {
+                      _productScopeFilter = ProductScopeFilter.globalOnly;
+                      final selected = _productById(_productId);
+                      if (selected?.ownerId != null) {
+                        _productId = null;
+                      }
+                    }
+                  }),
                   decoration: const InputDecoration(labelText: 'Ägare (användare)'),
                 ),
                 const SizedBox(height: 12),
               ] else ...[
+                Text(
+                  'Produkt: ${widget.initial!.displayName}',
+                  style: Theme.of(context).textTheme.bodyMedium,
+                ),
+                const SizedBox(height: 8),
                 Text(
                   'Ägare: ${widget.initial!.username} (${widget.initial!.userEmail})',
                   style: Theme.of(context).textTheme.bodyMedium,
@@ -673,11 +711,73 @@ class _PantryFormDialogState extends State<_PantryFormDialog> {
                   });
                 },
               ),
-              const SizedBox(height: 12),
-              TextFormField(
-                controller: _locationController,
+              if (_ownerUserId != null) ...[
+                const SizedBox(height: 8),
+                SegmentedButton<ProductScopeFilter>(
+                  segments: const [
+                    ButtonSegment<ProductScopeFilter>(
+                      value: ProductScopeFilter.all,
+                      label: Text('Alla'),
+                    ),
+                    ButtonSegment<ProductScopeFilter>(
+                      value: ProductScopeFilter.globalOnly,
+                      label: Text('Globala'),
+                    ),
+                    ButtonSegment<ProductScopeFilter>(
+                      value: ProductScopeFilter.privateOnly,
+                      label: Text('Privata'),
+                    ),
+                  ],
+                  selected: {_productScopeFilter},
+                  onSelectionChanged: (selection) {
+                    if (selection.isEmpty) return;
+                    setState(() => _productScopeFilter = selection.first);
+                  },
+                ),
+                const SizedBox(height: 12),
+              ] else ...[
+                const SizedBox(height: 12),
+              ],
+              DropdownButtonFormField<String>(
+                initialValue: _locationDropdownValue(),
                 decoration: const InputDecoration(labelText: 'Plats (valfritt)'),
+                items: [
+                  ...widget.locationOptions.map(
+                    (option) => DropdownMenuItem<String>(
+                      value: option,
+                      child: Text(option),
+                    ),
+                  ),
+                  const DropdownMenuItem<String>(
+                    value: _manualLocationValue,
+                    child: Text('Ange manuellt...'),
+                  ),
+                ],
+                onChanged: (value) {
+                  if (value == null) {
+                    setState(() {
+                      _useManualLocation = false;
+                      _locationController.clear();
+                    });
+                    return;
+                  }
+                  if (value == _manualLocationValue) {
+                    setState(() => _useManualLocation = true);
+                    return;
+                  }
+                  setState(() {
+                    _useManualLocation = false;
+                    _locationController.text = value;
+                  });
+                },
               ),
+              if (_useManualLocation) ...[
+                const SizedBox(height: 12),
+                TextFormField(
+                  controller: _locationController,
+                  decoration: const InputDecoration(labelText: 'Plats (manuell)'),
+                ),
+              ],
             ],
           ),
         ),
@@ -714,4 +814,4 @@ class _PantryFormDialogState extends State<_PantryFormDialog> {
       ],
     );
   }
-}
+}