feat: scan book to add to sell

lib/data/repositories/bal_repository.dart

@@ -55,6 +55,13 @@ class BalRepository {
         false;
   }
 
+  Future<Bal?> ongoingBal() async {
+    if (_bals == null) {
+      await _getBalsNoCache();
+    }
+    return _bals!.where((bal) => bal.state == BalState.ongoing).firstOrNull;
+  }
+
   Future<Result<Bal>> stopBal(int id) async {
     final result = await _apiClient.stopBal(id);
     _getBalsNoCache();

lib/data/repositories/book_instance_repository.dart

@@ -11,6 +11,10 @@ class BookInstanceRepository {
 
   final ApiClient _apiClient;
 
+  Future<Result<List<BookInstance>>> getByEan(int balId, int ean) async {
+    return await _apiClient.getBookInstanceByEAN(balId, ean);
+  }
+
   Future<Result<BookInstance>> sendBook(
     Book book,
     Owner owner,

lib/data/repositories/book_repository.dart

@@ -8,6 +8,10 @@ class BookRepository {
   final ApiClient _apiClient;
 
   Future<Result<Book>> getBookByEAN(String ean) async {
-    return _apiClient.getBookByEAN(ean);
+    return await _apiClient.getBookByEAN(ean);
+  }
+
+  Future<Result<Book>> getBookById(int id) async {
+    return await _apiClient.getBookById(id);
   }
 }

lib/data/repositories/owner_repository.dart

@@ -33,6 +33,18 @@ class OwnerRepository {
     return result;
   }
 
+  Future<Result<Owner>> getOwnerById(int id) async {
+    if (_cachedOwners != null) {
+      final result1 = _cachedOwners!
+          .where((owner) => owner.id == id)
+          .firstOrNull;
+      if (result1 != null) {
+        return Result.ok(result1);
+      }
+    }
+    return await _apiClient.getOwnerById(id);
+  }
+
   /// Adds an [Owner] to the database, and gets the resulting [Owner].
   Future<Result<Owner>> addOwner(
     String firstName,

lib/data/services/api_client.dart

@@ -236,6 +236,27 @@ class ApiClient {
  * ===================
 */
 
+  Future<Result<Book>> getBookById(int id) async {
+    final client = Client();
+    try {
+      final headers = await _getHeaders();
+      final response = await client.get(
+        Uri.parse("https://$apiBasePath/book/id/${id.toString()}"),
+        headers: headers,
+      );
+      if (response.statusCode == 200) {
+        final json = jsonDecode(response.body);
+        return Result.ok(Book.fromJSON(json));
+      } else {
+        throw Exception("The book was not found");
+      }
+    } catch (e) {
+      return Result.error(Exception("API $e"));
+    } finally {
+      client.close();
+    }
+  }
+
   Future<Result<Book>> getBookByEAN(String ean) async {
     final client = Client();
     try {
@@ -263,6 +284,32 @@ class ApiClient {
  * =============================
 */
 
+  Future<Result<List<BookInstance>>> getBookInstanceByEAN(
+    int balId,
+    int ean,
+  ) async {
+    final client = Client();
+    try {
+      final headers = await _getHeaders();
+      final response = await client.get(
+        Uri.parse(
+          "https://$apiBasePath/bal/${balId.toString()}/ean/${ean.toString()}/book_instances",
+        ),
+        headers: headers,
+      );
+      if (response.statusCode == 200) {
+        final json = jsonDecode(response.body) as List<dynamic>;
+        return Result.ok(json.map((el) => BookInstance.fromJSON(el)).toList());
+      } else {
+        throw "Unknown Error";
+      }
+    } catch (e) {
+      return Result.error(Exception("API $e"));
+    } finally {
+      client.close();
+    }
+  }
+
   Future<Result<BookInstance>> sendBook(
     Book book,
     Owner owner,
@@ -304,6 +351,27 @@ class ApiClient {
  * ====================
 */
 
+  Future<Result<Owner>> getOwnerById(int id) async {
+    final client = Client();
+    try {
+      final headers = await _getHeaders();
+      final response = await client.get(
+        Uri.parse("https://$apiBasePath/owner/${id.toString()}"),
+        headers: headers,
+      );
+      if (response.statusCode == 200) {
+        final json = jsonDecode(response.body);
+        return Result.ok(Owner.fromJSON(json));
+      } else {
+        throw Exception("The owner was not found");
+      }
+    } catch (e) {
+      return Result.error(Exception("API $e"));
+    } finally {
+      client.close();
+    }
+  }
+
   Future<Result<Owner>> getSectionOwner() async {
     final client = Client();
     try {

lib/domain/models/book_stack.dart

@@ -0,0 +1,15 @@
+import 'package:seshat/domain/models/book.dart';
+import 'package:seshat/domain/models/book_instance.dart';
+import 'package:seshat/domain/models/owner.dart';
+
+class BookStack {
+  BookStack(this.book, this.instance, this.owner);
+
+  Book book;
+  BookInstance instance;
+  Owner owner;
+
+  String shortId() {
+    return "${owner.firstName[0].toUpperCase()}${owner.lastName[0].toUpperCase()}${instance.price}";
+  }
+}

lib/routing/router.dart

@@ -80,7 +80,12 @@ GoRouter router(AuthRepository authRepository) => GoRouter(
         GoRoute(
           path: Routes.sell,
           pageBuilder: (context, state) {
-            final viewModel = SellViewModel(balRepository: context.read());
+            final viewModel = SellViewModel(
+              balRepository: context.read(),
+              bookInstanceRepository: context.read(),
+              bookRepository: context.read(),
+              ownerRepository: context.read(),
+            );
             return NoTransitionPage(child: SellPage(viewModel: viewModel));
           },
         ),

lib/ui/sell_page/view_model/sell_view_model.dart

@@ -1,18 +1,34 @@
 import 'package:flutter/widgets.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
 import 'package:seshat/data/repositories/bal_repository.dart';
+import 'package:seshat/data/repositories/book_instance_repository.dart';
+import 'package:seshat/data/repositories/book_repository.dart';
+import 'package:seshat/data/repositories/owner_repository.dart';
 import 'package:seshat/domain/models/bal.dart';
+import 'package:seshat/domain/models/book.dart';
 import 'package:seshat/domain/models/book_instance.dart';
+import 'package:seshat/domain/models/book_stack.dart';
+import 'package:seshat/domain/models/owner.dart';
 import 'package:seshat/utils/command.dart';
 import 'package:seshat/utils/result.dart';
 
 class SellViewModel extends ChangeNotifier {
-  SellViewModel({required BalRepository balRepository})
+  SellViewModel({
-    : _balRepository = balRepository {
+    required BalRepository balRepository,
+    required BookInstanceRepository bookInstanceRepository,
+    required BookRepository bookRepository,
+    required OwnerRepository ownerRepository,
+  }) : _balRepository = balRepository,
+       _bookInstanceRepository = bookInstanceRepository,
+       _bookRepository = bookRepository,
+       _ownerRepository = ownerRepository {
     load = Command0(_load)..execute();
   }
 
   final BalRepository _balRepository;
+  final BookInstanceRepository _bookInstanceRepository;
+  final BookRepository _bookRepository;
+  final OwnerRepository _ownerRepository;
 
   bool _showScan = false;
   bool get showScan => _showScan;
@@ -27,28 +43,26 @@ class SellViewModel extends ChangeNotifier {
  * ===============================
 */
 
-  final List<BookInstance> _scannedBooks = [];
+  final List<BookStack> _soldBooks = [];
-  List<BookInstance> get scannedBooks => _scannedBooks;
+  List<BookStack> get soldBooks => _soldBooks;
-  void scanBook(BarcodeCapture barcode) {
+
-    final addedBook = BookInstance(
+  final List<BookStack> _scannedBooks = [];
-      balId: 5,
+  List<BookStack> get scannedBooks => _scannedBooks;
-      bookId: 5,
+
-      id: _scannedBooks.length,
+  bool isScanLoaded = false;
-      ownerId: 5,
+
-      price: 5,
+  void sellBook(BookStack addedBook) {
-      available: true,
+    _soldBooks.add(addedBook);
-    );
-    _scannedBooks.add(addedBook);
     notifyListeners();
   }
 
   void sendSell() {
-    _scannedBooks.clear();
+    _soldBooks.clear();
     notifyListeners();
   }
 
   void deleteBook(int id) {
-    _scannedBooks.removeWhere((book) => book.id == id);
+    _soldBooks.removeWhere((book) => book.instance.id == id);
     notifyListeners();
   }
 
@@ -61,6 +75,11 @@ class SellViewModel extends ChangeNotifier {
     switch (result) {
       case Ok():
         for (BookInstance instance in result.value) {
+          if (_soldBooks
+              .where((book) => book.instance.id == instance.id)
+              .isNotEmpty) {
+            continue;
+          }
           Book book;
           final result2 = await _bookRepository.getBookById(instance.bookId);
           switch (result2) {
@@ -79,9 +98,7 @@ class SellViewModel extends ChangeNotifier {
             case Error():
               continue;
           }
-          _scannedBooks.add(
+          _scannedBooks.add(BookStack(book, instance, owner));
-            BookStack(instance: instance, book: book, owner: owner),
-          );
         }
         break;
       case Error():

lib/ui/sell_page/widgets/scan_screen.dart

@@ -3,6 +3,7 @@ import 'package:flutter_svg/svg.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
 import 'package:seshat/ui/sell_page/view_model/sell_view_model.dart';
 import 'package:seshat/ui/sell_page/widgets/manual_scan_popup.dart';
+import 'package:seshat/ui/sell_page/widgets/sell_choice_popup.dart';
 
 class ScanScreen extends StatefulWidget {
   const ScanScreen({super.key, required this.viewModel});
@@ -30,12 +31,23 @@ class _ScanScreenState extends State<ScanScreen> {
     final theme = Theme.of(context);
     return Stack(
       children: [
+        ColoredBox(
+          color: Theme.of(context).scaffoldBackgroundColor,
+          child: SizedBox(
+            width: MediaQuery.sizeOf(context).width,
+            height: MediaQuery.sizeOf(context).height,
+          ),
+        ),
         MobileScanner(
           controller: controller,
           onDetect: (barcodes) async {
-            widget.viewModel.showScan = false;
+            controller.stop();
-            widget.viewModel.scanBook(barcodes);
+            showDialog(
-            controller.dispose();
+              context: context,
+              builder: (context) =>
+                  SellChoicePopup(viewModel: widget.viewModel),
+            );
+            await widget.viewModel.scanBook(barcodes);
           },
         ),
         SafeArea(

lib/ui/sell_page/widgets/sell_choice_popup.dart

@@ -0,0 +1,64 @@
+import 'package:flutter/material.dart';
+import 'package:seshat/domain/models/book_stack.dart';
+import 'package:seshat/ui/sell_page/view_model/sell_view_model.dart';
+
+class SellChoicePopup extends StatelessWidget {
+  const SellChoicePopup({super.key, required this.viewModel});
+
+  final SellViewModel viewModel;
+
+  @override
+  Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: viewModel,
+      builder: (context, child) {
+        return AlertDialog(
+          title: Text("Choix du bon livre"),
+          content: switch (viewModel.isScanLoaded) {
+            false => SizedBox(
+              height: 300,
+              child: Center(child: CircularProgressIndicator()),
+            ),
+            true => SingleChildScrollView(
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  (viewModel.scannedBooks.isEmpty)
+                      ? Text(
+                          "Ce livre n'a jamais été rentré, ou vous l'avez déjà mis dans cette vente.",
+                        )
+                      : SizedBox(),
+                  for (BookStack book in viewModel.scannedBooks)
+                    Padding(
+                      padding: const EdgeInsets.symmetric(horizontal: 15),
+                      child: Card(
+                        child: InkWell(
+                          onTap: () {
+                            viewModel.sellBook(book);
+                            Navigator.of(context).pop();
+                            viewModel.showScan = false;
+                          },
+                          child: ListTile(
+                            leading: Text(
+                              "${book.instance.price.toString()}€",
+                              style: TextStyle(fontSize: 30),
+                            ),
+                            title: Text(
+                              "${book.book.title} · ${book.book.author}",
+                            ),
+                            subtitle: Text(
+                              "${book.owner.firstName} ${book.owner.lastName} (${book.shortId()})",
+                            ),
+                          ),
+                        ),
+                      ),
+                    ),
+                ],
+              ),
+            ),
+          },
+        );
+      },
+    );
+  }
+}

lib/ui/sell_page/widgets/sell_page.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
-import 'package:seshat/domain/models/book_instance.dart';
+import 'package:seshat/domain/models/book_stack.dart';
 import 'package:seshat/routing/routes.dart';
 import 'package:seshat/ui/core/ui/navigation_bar.dart';
 import 'package:seshat/ui/sell_page/view_model/sell_view_model.dart';
@@ -75,8 +75,7 @@ class _SellPageState extends State<SellPage> {
                               (widget.viewModel.scannedBooks.isEmpty)
                                   ? Center(child: Text("Aucun"))
                                   : SizedBox(),
-                              for (BookInstance bookInstance
+                              for (BookStack book in widget.viewModel.soldBooks)
-                                  in widget.viewModel.scannedBooks)
                                 Padding(
                                   padding: const EdgeInsets.symmetric(
                                     horizontal: 15,
@@ -84,19 +83,19 @@ class _SellPageState extends State<SellPage> {
                                   child: Card(
                                     child: ListTile(
                                       leading: Text(
-                                        "${bookInstance.price.toString()}€",
+                                        "${book.instance.price.toString()}€",
                                         style: TextStyle(fontSize: 30),
                                       ),
                                       title: Text(
-                                        "Les chiens et la charrue · Patrick K. Dewdney ${bookInstance.id}",
+                                        "${book.book.title} · ${book.book.author}",
                                       ),
                                       subtitle: Text(
-                                        "Union Étudiante Auvergne",
+                                        "${book.owner.firstName} ${book.owner.lastName} (${book.shortId()})",
                                       ),
                                       trailing: IconButton(
                                         onPressed: () {
                                           widget.viewModel.deleteBook(
-                                            bookInstance.id,
+                                            book.instance.id,
                                           );
                                         },
                                         icon: Icon(Icons.delete),