Merge branch 'backend'

# Conflicts:
#	.gitignore
#	db_scripts/create.sql

Frontend-user/README.md

@@ -14,3 +14,21 @@ A few resources to get you started if this is your first Flutter project:
 For help getting started with Flutter development, view the
 [online documentation](https://docs.flutter.dev/), which offers tutorials,
 samples, guidance on mobile development, and a full API reference.
+
+## toDo
+
+- Einstellungen
+    - darkmode
+    - Secure Storage: https://pub.dev/packages/flutter_secure_storage
+- Einkauf
+- Finance
+    - Einkaufskorb editieren
+        - nur 1 Monat lang möglich
+        - Speichern des veränderten Warenkorbs
+        - redesign (statefull)
+    - farbliche Hervorhebungen
+    - ausstehende Beträge für monatliche Aufladungen
+        - eventuell muss sample data angepasst werden
+- pre-Release:
+    - semanticLabels, Screenreader-Support
+    - Error-Management (throws)

Frontend-user/lib/basket.dart

@@ -0,0 +1,76 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'sample_data.dart';
+
+class ShowBasket extends StatelessWidget {
+  final Basket basket;
+  final bool editable;
+  const ShowBasket(this.basket, {this.editable = false, super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        Expanded(
+          child: getBasket(basket),
+        ),
+        const Divider(),
+        ListTile(
+            leading: const Icon(
+              Icons.euro,
+            ),
+            title: const Text(
+              'Kosten:',
+            ),
+            subtitle: Text(
+              '${basket.price}',
+            ),
+            trailing: editable
+                ? Row(
+                    mainAxisSize: MainAxisSize.min,
+                    children: [
+                      FloatingActionButton(
+                          backgroundColor: Colors.redAccent.shade100,
+                          child: const Icon(Icons.remove_shopping_cart),
+                          onPressed: () {}),
+                      const SizedBox(
+                        width: 10,
+                      ),
+                      FloatingActionButton(
+                          child: const Icon(Icons.shopping_cart_checkout),
+                          onPressed: () {}),
+                    ],
+                  )
+                : null),
+      ],
+    );
+  }
+
+  ListView getBasket(Basket basket) {
+    return ListView.builder(
+      itemCount: basket.purchases.length,
+      itemBuilder: (context, index) {
+        return Card(
+          child: ListTile(
+              leading: Text(
+                basket.purchases.keys.elementAt(index).category.icon,
+                style: const TextStyle(fontSize: 24),
+              ),
+              title: Text(basket.purchases.keys.elementAt(index).name),
+              subtitle: Text(
+                  '${basket.purchases.values.elementAt(index)} ${basket.purchases.keys.elementAt(index).unit}'),
+              trailing: editable
+                  ? SizedBox(
+                      width: 100,
+                      child: TextField(
+                          keyboardType: TextInputType.number,
+                          inputFormatters: <TextInputFormatter>[
+                            FilteringTextInputFormatter.digitsOnly
+                          ]),
+                    )
+                  : null),
+        );
+      },
+    );
+  }
+}

Frontend-user/lib/expand.dart

@@ -0,0 +1,60 @@
+import 'package:flutter/material.dart';
+
+//this was used in a earlier version of the app and will possibly be removed in future versions.
+
+class Expand extends StatefulWidget {
+  final Widget child;
+  final bool expand;
+  const Expand({super.key, this.expand = true, required this.child});
+
+  @override
+  State<Expand> createState() => _ExpandState();
+}
+
+class _ExpandState extends State<Expand> with SingleTickerProviderStateMixin {
+  late AnimationController expandController;
+  late Animation<double> animation;
+
+  @override
+  void initState() {
+    super.initState();
+    prepareAnimations();
+    _runExpandCheck();
+  }
+
+  ///Setting up the animation
+  void prepareAnimations() {
+    expandController = AnimationController(
+        vsync: this, duration: const Duration(milliseconds: 500));
+    animation = CurvedAnimation(
+      parent: expandController,
+      curve: Curves.fastOutSlowIn,
+    );
+  }
+
+  void _runExpandCheck() {
+    if (widget.expand) {
+      expandController.forward();
+    } else {
+      expandController.reverse();
+    }
+  }
+
+  @override
+  void didUpdateWidget(Expand oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    _runExpandCheck();
+  }
+
+  @override
+  void dispose() {
+    expandController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return SizeTransition(
+        axisAlignment: 1.0, sizeFactor: animation, child: widget.child);
+  }
+}

Frontend-user/lib/finance.dart

@@ -1,103 +1,111 @@
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import 'package:intl/date_symbol_data_local.dart';
-
-/*
-todo:
-  - Design
-  - Details zum Warenkorb und Beschreibung (Popup?)
-  - farbliche Hervorhebungen
-*/
-
-enum Art { monatlBeitrag, aufladung, einkauf, korrektur }
-
-final now = DateTime.now();
-
-class Transaction {
-  int betrag;
-  Art art;
-  DateTime datum;
-  String beschreibung;
-  Transaction(this.art, this.betrag, this.datum, this.beschreibung);
-}
+import 'basket.dart';
+import 'sample_data.dart';
 
 class Finance extends StatelessWidget {
-  Finance({super.key});
-
-  final List<Transaction> transactions = [
-    Transaction(Art.monatlBeitrag, 0, now, ''),
-    Transaction(Art.aufladung, 2042, now, ''),
-    Transaction(Art.einkauf, -2442, now.subtract(const Duration(days: 2)), ''),
-    Transaction(Art.korrektur, 2332, now.subtract(const Duration(hours: 5)),
-        'Korrektur des Warenkorbs')
-  ];
+  const Finance({super.key});
 
   @override
   Widget build(BuildContext context) {
     initializeDateFormatting('de_DE');
+    Intl.defaultLocale = 'de_DE';
 
-    return ListView.builder(
-      itemCount: null,
-      itemBuilder: (context, index) {
-        if (index == 0) {
-          return const Card(
-            child: Padding(
-              padding: EdgeInsets.all(8.0),
-              child: Row(
-                mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                children: [
-                  Icon(
-                    Icons.euro,
-                    //color: Colors.black,
-                    //semanticLabel: 'Text for screenreader',
-                  ),
-                  Column(
-                    children: [
-                      Text(
-                        'Aktuelles Guthaben:',
-                        style: TextStyle(fontWeight: FontWeight.bold),
-                      ),
-                      Text(
-                        '-00,34€',
-                        style: TextStyle(fontWeight: FontWeight.bold),
-                      )
-                    ],
-                  )
-                ],
-              ),
-            ),
-          );
-        } else if (index <= transactions.length) {
-          return Card(
-            child: Padding(
-              padding: const EdgeInsets.all(8.0),
-              child: Row(
-                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
-                children: [
-                  Icon(transactions[index - 1].art == Art.korrektur
-                      ? Icons.error
-                      : Icons.money),
-                  Column(
-                    children: [
-                      Row(
-                        children: [
-                          Text(DateFormat("EEEE, dd. MMMM yyyy HH:mm", 'de_DE')
-                              .format(now)),
-                          Text(
-                              '${transactions[index - 1].art}:  ${transactions[index - 1].betrag / 100}€'),
-                        ],
-                      ),
-                      Text(transactions[index - 1].beschreibung)
-                    ],
-                  ),
-                ],
-              ),
-            ),
-          );
-        } else {
-          return null;
-        }
-      },
-    );
+    return Scaffold(
+        appBar: AppBar(
+          toolbarHeight: 75,
+          title: const Card(
+            child: ListTile(
+                leading: Icon(
+                  Icons.euro,
+                ),
+                title: Text(
+                  'Aktuelles Guthaben:',
+                ),
+                subtitle: Text(
+                  '-00,34€',
+                )),
+          ),
+        ),
+        body: ListView.builder(
+            itemCount: SampleData().transactions.length,
+            itemBuilder: (context, index) {
+              return Card(
+                  child: ListTile(
+                      leading: getIcon(SampleData().transactions[index].type),
+                      title:
+                          Text(gettitle(SampleData().transactions[index].type)),
+                      subtitle: getSubtitle(SampleData().transactions[index]),
+                      trailing: getTrailing(context, index),
+                      onTap: (SampleData().transactions[index].basket != null)
+                          ? () {
+                              showBottomSheet(
+                                  context: context,
+                                  builder: (BuildContext context) {
+                                    return ShowBasket(SampleData()
+                                        .transactions[index]
+                                        .basket!);
+                                  });
+                            }
+                          : null));
+            }));
+  }
+
+  String gettitle(TransaktionArt art) {
+    switch (art) {
+      case TransaktionArt.aufladung:
+        return 'Aufladung';
+      case TransaktionArt.einkauf:
+        return 'Einkauf';
+      case TransaktionArt.korrektur:
+        return 'Korrektur';
+      case TransaktionArt.monatlBeitrag:
+        return 'Monatlicher Beitrag';
+      default:
+        return 'Ein Error ist aufgetreten';
+    }
+  }
+
+  Text getSubtitle(Transaction transaction) {
+    String text = '${transaction.amount / 100}';
+    text += '€  ';
+    text += DateFormat("EEEE, dd. MMMM yyyy HH:mm").format(transaction.date);
+    if (transaction.description != null) {
+      (text += '\n${transaction.description}');
+    }
+
+    return Text(text);
+  }
+
+  Icon getIcon(TransaktionArt art) {
+    switch (art) {
+      case TransaktionArt.aufladung:
+        return const Icon(Icons.savings);
+      case TransaktionArt.einkauf:
+        return const Icon(Icons.shopping_basket);
+      case TransaktionArt.monatlBeitrag:
+        return const Icon(Icons.payment);
+      default:
+        return const Icon(Icons.priority_high);
+    }
+  }
+
+  getTrailing(BuildContext context, int index) {
+    if (SampleData().transactions[index].type == TransaktionArt.einkauf) {
+      return IconButton(
+        icon: const Icon(Icons.manage_history),
+        onPressed: () {
+          showBottomSheet(
+              context: context,
+              builder: (BuildContext context) {
+                return ShowBasket(SampleData().transactions[index].basket!,
+                    editable: true);
+              });
+        },
+      );
+    } else {
+      return null;
+    }
   }
 }

Frontend-user/lib/main.dart

@@ -1,4 +1,6 @@
 import 'package:flutter/material.dart';
+import 'package:mitgliederladen/shopping.dart';
+import 'package:mitgliederladen/settings.dart';
 import 'finance.dart';
 
 void main() {
@@ -14,10 +16,21 @@ class MyApp extends StatelessWidget {
       title: 'SoNaKo Demo App',
       debugShowCheckedModeBanner: false,
       theme: ThemeData(
+          //darkgreen:5f7c61, mediumgreen: 66906a, lightgreen: 9cbe96, yellow: f5de64
           useMaterial3: true,
+          brightness: Brightness.light,
+          textTheme: Typography.englishLike2021,
           colorScheme: ColorScheme.fromSeed(
-              seedColor: Colors.green)), //9bbee6 //79,128,104
-      darkTheme: ThemeData.dark(),
+              brightness: Brightness.light,
+              seedColor: const Color(0xff5f7c61))),
+      darkTheme: ThemeData(
+          useMaterial3: true,
+          brightness: Brightness.dark,
+          textTheme: Typography.englishLike2021,
+          colorScheme: ColorScheme.fromSeed(
+            brightness: Brightness.dark,
+            seedColor: const Color(0xff5f7c61),
+          )),
       themeMode: ThemeMode.system,
       home: const MyHomePage(),
     );
@@ -39,6 +52,8 @@ class _MyHomePageState extends State<MyHomePage> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
+        leading:
+            const Image(image: AssetImage('assets/logo_sonako_4c_optimal.png')),
         title: const Text('SoNaKo Demo App'),
       ),
       bottomNavigationBar: NavigationBar(
@@ -65,14 +80,9 @@ class _MyHomePageState extends State<MyHomePage> {
         ],
       ),
       body: <Widget>[
-        Container(
-          color: Colors.red,
-          alignment: Alignment.center,
-          child: Text('Page $test'),
-        ),
-        Finance(),
-        const Text(
-            'Hier könnten Einstellungen zu Darkmode mit shared_preferences und riverpod sein')
+        const Shopping(),
+        const Finance(),
+        const Settings()
       ][currentPageIndex],
     );
   }

Frontend-user/lib/sample_data.dart

@@ -0,0 +1,223 @@
+import 'package:uuid/uuid.dart';
+
+final DateTime now = DateTime.now();
+
+enum TransaktionArt { monatlBeitrag, aufladung, einkauf, korrektur }
+
+enum Unit { stueck, menge }
+
+class Category {
+  final String name;
+  final String icon;
+  const Category({required this.name, required this.icon});
+}
+
+class Transaction {
+  int id = 0;
+  int amount;
+  TransaktionArt type;
+  DateTime date;
+  Basket? basket;
+  String? description;
+  Transaction(
+      {required this.type,
+      required this.amount,
+      required this.date,
+      this.description,
+      this.basket});
+}
+
+class Product {
+  final int id = 0;
+  final String name;
+  final Unit unit; //pro Kg oder Stück
+  final double price;
+  final double vat;
+  final Category category;
+  const Product(this.name, this.unit, this.price, this.vat, this.category);
+}
+
+class Basket {
+  Map<Product, int> purchases;
+  double price;
+  String guid;
+  Basket(this.purchases, this.price) : guid = const Uuid().v4();
+
+  void addItem(Product product, int quantity) {
+    if (purchases.containsKey(product)) {
+      purchases.update(
+          product, (existingQuantity) => existingQuantity + quantity);
+    } else {
+      purchases[product] = quantity;
+    }
+  }
+
+  void removeItem(Product product) {
+    purchases.remove(product);
+  }
+}
+
+class SampleData {
+  static const List<Category> categories = [
+    Category(name: 'Obst und Gemüse', icon: '🍒'),
+    Category(name: 'Kochen und Backen', icon: '🍝'),
+    Category(name: 'Brot, Cerealien & Aufstriche', icon: '🍞'),
+    Category(name: 'Getränke und Pfand', icon: '🫖'),
+    Category(name: 'Drogerie und Haushalt', icon: '🧼'),
+    Category(name: 'Öl, Soßen und Gewürze', icon: '🫚'),
+    Category(name: 'Süßes und Knabbereien', icon: '🍪')
+  ];
+
+  static List<Product> products = [
+    Product('Apfel', Unit.stueck, 0.23, 7, categories[0]),
+    Product('Mehl', Unit.menge, 0.003, 19, categories[1]),
+    Product('Brot', Unit.stueck, 1.23, 7, categories[2]),
+    Product('Milch', Unit.stueck, 2.23, 3, categories[3]),
+    Product('Zahnpasta', Unit.stueck, 0.23, 7, categories[4]),
+    Product('Pfeffer', Unit.stueck, 0.23, 7, categories[5]),
+    Product('Schokolade', Unit.menge, 0.23, 7, categories[6]),
+    Product('Flaschenpfand', Unit.stueck, -0.15, 0, categories[3])
+  ];
+
+  //such a basket can not exist later. It is for testing purposes
+  // when scrolling through a long basket
+  static Basket basket = Basket({
+    products[0]: 20,
+    products[1]: 2200,
+    products[2]: 2,
+    products[3]: 1,
+    products[4]: 1,
+    products[5]: 2,
+    products[6]: 222,
+    products[0]: 20,
+    products[1]: 2200,
+    products[2]: 2,
+    products[3]: 1,
+    products[4]: 1,
+    products[5]: 2,
+    products[6]: 222
+  }, 27.9);
+
+  static Basket basket2 = Basket({
+    products[0]: 22,
+    products[1]: 2241,
+    products[3]: 2,
+    products[4]: 4,
+    products[6]: 2,
+    products[7]: 5,
+  }, 34);
+
+  static Basket basket3 = Basket({
+    products[0]: 2,
+    products[1]: 21,
+    products[3]: 4,
+    products[4]: 1,
+    products[6]: 5,
+  }, -1);
+
+  List<Transaction> transactions = [
+    Transaction(
+      type: TransaktionArt.monatlBeitrag,
+      amount: 0,
+      date: now,
+    ),
+    Transaction(
+      type: TransaktionArt.aufladung,
+      amount: 2042,
+      date: now,
+    ),
+    Transaction(
+        type: TransaktionArt.einkauf,
+        amount: -2442,
+        date: now.subtract(const Duration(days: 2)),
+        basket: basket),
+    Transaction(
+      type: TransaktionArt.korrektur,
+      amount: 2332,
+      date: now.subtract(const Duration(hours: 5)),
+      description: 'Korrektur des Warenkorbs',
+      basket: basket3,
+    ),
+    Transaction(
+      type: TransaktionArt.monatlBeitrag,
+      amount: 0,
+      date: now,
+    ),
+    Transaction(
+      type: TransaktionArt.aufladung,
+      amount: 2042,
+      date: now,
+    ),
+    Transaction(
+        type: TransaktionArt.einkauf,
+        amount: -2442,
+        date: now.subtract(const Duration(days: 2)),
+        basket: basket2),
+    Transaction(
+        type: TransaktionArt.korrektur,
+        amount: 2332,
+        date: now.subtract(const Duration(hours: 5)),
+        description: 'Korrektur des FinanzAK'),
+    Transaction(
+      type: TransaktionArt.monatlBeitrag,
+      amount: 0,
+      date: now,
+    ),
+    Transaction(
+      type: TransaktionArt.aufladung,
+      amount: 2042,
+      date: now,
+    ),
+    Transaction(
+      type: TransaktionArt.einkauf,
+      amount: -2442,
+      date: now.subtract(const Duration(days: 2)),
+      basket: basket,
+    ),
+    Transaction(
+        type: TransaktionArt.korrektur,
+        amount: 2332,
+        date: now.subtract(const Duration(hours: 5)),
+        description: 'Korrektur des Warenkorbs'),
+    Transaction(
+      type: TransaktionArt.monatlBeitrag,
+      amount: 0,
+      date: now,
+    ),
+    Transaction(
+      type: TransaktionArt.aufladung,
+      amount: 2042,
+      date: now,
+    ),
+    Transaction(
+        type: TransaktionArt.einkauf,
+        amount: -2442,
+        date: now.subtract(const Duration(days: 2)),
+        basket: basket),
+    Transaction(
+        type: TransaktionArt.korrektur,
+        amount: 2332,
+        date: now.subtract(const Duration(hours: 5)),
+        description: 'Korrektur des Warenkorbs'),
+    Transaction(
+      type: TransaktionArt.monatlBeitrag,
+      amount: 0,
+      date: now,
+    ),
+    Transaction(
+      type: TransaktionArt.aufladung,
+      amount: 2042,
+      date: now,
+    ),
+    Transaction(
+        type: TransaktionArt.einkauf,
+        amount: -2442,
+        date: now.subtract(const Duration(days: 2)),
+        basket: basket2),
+    Transaction(
+        type: TransaktionArt.korrektur,
+        amount: 2332,
+        date: now.subtract(const Duration(hours: 5)),
+        description: 'Korrektur des Warenkorbs'),
+  ];
+}

Frontend-user/lib/settings.dart

@@ -0,0 +1,19 @@
+import 'package:flutter/material.dart';
+
+class Settings extends StatelessWidget {
+  const Settings({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    //Hier in dem Return kann der Inhalt des Setting Tabs angepasst werden
+    return ListView(children: const <Widget>[
+      ListTile(
+        leading: Icon(Icons.dark_mode),
+        title: Text(
+          'Hier könnten Einstellungen zu Darkmode sein',
+          maxLines: 2,
+        ),
+      )
+    ]);
+  }
+}

Frontend-user/lib/shopping.dart

@@ -0,0 +1,41 @@
+import 'package:flutter/material.dart';
+import 'package:mitgliederladen/sample_data.dart';
+
+class Shopping extends StatelessWidget {
+  const Shopping({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+        floatingActionButton: FloatingActionButton(
+          child: const Icon(Icons.shopping_cart),
+          onPressed: () {},
+        ),
+        body: GridView.builder(
+            gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+                crossAxisCount: 2),
+            itemCount: SampleData.categories.length,
+            itemBuilder: ((context, index) {
+              return Card(
+                child: Column(children: [
+                  Expanded(
+                    child: FittedBox(
+                      fit: BoxFit.scaleDown,
+                      child: Text(
+                        SampleData.categories[index].icon,
+                        style: const TextStyle(fontSize: 400),
+                      ),
+                    ),
+                  ),
+                  Padding(
+                    padding: const EdgeInsets.all(8.0),
+                    child: Text(
+                      SampleData.categories[index].name,
+                      style: Theme.of(context).textTheme.labelLarge,
+                    ),
+                  ),
+                ]),
+              );
+            })));
+  }
+}

Frontend-user/pubspec.lock

@@ -41,6 +41,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.17.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -184,6 +192,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.5.1"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.2"
+  uuid:
+    dependency: "direct main"
+    description:
+      name: uuid
+      sha256: "648e103079f7c64a36dc7d39369cabb358d377078a051d6ae2ad3aa539519313"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.7"
   vector_math:
     dependency: transitive
     description:

Frontend-user/pubspec.yaml

@@ -36,6 +36,7 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
   intl: ^0.18.1
+  uuid: ^3.0.7
 
 dev_dependencies:
   flutter_test:
@@ -60,9 +61,8 @@ flutter:
   uses-material-design: true
 
   # To add assets to your application, add an assets section, like this:
-  # assets:
-  #   - images/a_dot_burr.jpeg
-  #   - images/a_dot_ham.jpeg
+  assets:
+    - assets/
 
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/assets-and-images/#resolution-aware

db_scripts/create.sql

@@ -13,9 +13,9 @@ CREATE TABLE IF NOT EXISTS transaktion_art (
     art VARCHAR(50) NOT NULL
 );
 
-INSERT INTO transaktion_art(art_id, art) VALUES (1, 'monatlicher_beitrag');
-INSERT INTO transaktion_art(art_id, art) VALUES (2, 'aufladung');
-INSERT INTO transaktion_art(art_id, art) VALUES (3, 'einkauf');
+INSERT OR IGNORE INTO transaktion_art(art_id, art) VALUES (1, 'monatlicher_beitrag');
+INSERT OR IGNORE INTO transaktion_art(art_id, art) VALUES (2, 'aufladung');
+INSERT OR IGNORE INTO transaktion_art(art_id, art) VALUES (3, 'einkauf');
 
 CREATE TABLE IF NOT EXISTS transaktion (
     transaktion_id INT NOT NULL PRIMARY KEY,
@@ -41,16 +41,16 @@ CREATE TABLE IF NOT EXISTS mwst (
     prozent INT NOT NULL
 );
 
-INSERT INTO mwst(mwst_id, prozent) VALUES (1, 7);
-INSERT INTO mwst(mwst_id, prozent) VALUES (2, 19);
+INSERT OR IGNORE INTO mwst(mwst_id, prozent) VALUES (1, 7);
+INSERT OR IGNORE INTO mwst(mwst_id, prozent) VALUES (2, 19);
 
 CREATE TABLE IF NOT EXISTS einheit(
     einheit_id INT NOT NULL PRIMARY KEY,
     bezeichnung VARCHAR(50) NOT NULL
 );
 
-INSERT INTO einheit(einheit_id, bezeichnung) VALUES (1, 'stueck');
-INSERT INTO einheit(einheit_id, bezeichnung) VALUES (2, 'menge');
+INSERT OR IGNORE INTO einheit(einheit_id, bezeichnung) VALUES (1, 'stueck');
+INSERT OR IGNORE INTO einheit(einheit_id, bezeichnung) VALUES (2, 'menge');
 
 CREATE TABLE IF NOT EXISTS artikel (
     artikel_id INT NOT NULL PRIMARY KEY,

server/.gitignore

@@ -0,0 +1,21 @@
+Cargo.lock
+target/
+guide/build/
+/gh-pages
+
+*.so
+*.out
+*.pyc
+*.pid
+*.sock
+*~
+.DS_Store
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# Configuration directory generated by CLion
+.idea
+
+# Configuration directory generated by VSCode
+.vscode

server/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "server"
+version = "1.0.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+actix-web ="4"
+utoipa = { version = "3", features = ["actix_extras"] }

server/readme.md

@@ -0,0 +1,15 @@
+# installation
+
+## windows (step 1)
+
+choco install -y
+
+## Linux, macos (alernate step 1)
+
+use apt, pacman, curl, brew or whatever.
+
+## Always (steps 2 and so on)
+
+- `rustup-init.sh` (Windows: rustup-init.ex, e.g. %AppData%\Local\Temp\chocolatey\rustup.install\1.25.1\rustup-init.exe)
+- select a good match in the dialog of this CLI installer
+

server/src/main.rs

@@ -0,0 +1,28 @@
+use actix_web::{get, post, web, App, HttpResponse, HttpServer, Responder};
+
+#[get("/")]
+async fn hello() -> impl Responder {
+    HttpResponse::Ok().body("Hello world!")
+}
+
+#[post("/echo")]
+async fn echo(req_body: String) -> impl Responder {
+    HttpResponse::Ok().body(req_body)
+}
+
+async fn manual_hello() -> impl Responder {
+    HttpResponse::Ok().body("Hey there!")
+}
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    HttpServer::new(|| {
+        App::new()
+            .service(hello)
+            .service(echo)
+            .route("/hey", web::get().to(manual_hello))
+    })
+    .bind(("127.0.0.1", 8080))?
+    .run()
+    .await
+}