Gemini did alot of things

config.py

@@ -1,7 +1,7 @@
 ADMIN_PASSWORD = "admin123"
 
 # Use UUIDs or simple string IDs
-REGISTERED_USERS = {"user_1": "Alice", "user_2": "Bob", "user_3": "Charlie"}
+REGISTERED_USERS = {"1": "Alice", "2": "Bob", "3": "Charlie"}
 
 MENU_ITEMS = {
     "item_1": {"name": "Coffee", "price": 2.50},

core/tracker.py

@@ -62,9 +62,18 @@ class Tracker:
         if user_id not in self.users:
             return {"status": "error", "message": "User not found"}
 
+        if user_id not in self.debts:
+            self.debts[user_id] = 0.0
         self.debts[user_id] -= amount
         self.data_manager.save_debts(self.debts)
 
+        from uuid import uuid4
+        from core.transaction import Transaction
+
+        transaction = Transaction(str(uuid4()), user_id, "adjustment", -amount)
+        self.transactions.append(transaction)
+        self.data_manager.save_transactions(self.transactions)
+
         return {
             "status": "success",
             "message": f"Reduced debt by {amount}",
@@ -84,3 +93,71 @@ class Tracker:
 
     def get_items(self):
         return self.items
+
+    def set_user_pin(self, user_id, pin):
+        if user_id not in self.users:
+            return {"status": "error", "message": "User not found"}
+        self.users[user_id].pin = pin
+        self.data_manager.save_users(self.users)
+        return {"status": "success", "message": "PIN updated successfully"}
+
+    def add_user(self, user_id, name):
+        from core.user import User
+        if user_id in self.users:
+            return {"status": "error", "message": "User ID already exists"}
+        self.users[user_id] = User(user_id, name, "4242")
+        self.data_manager.save_users(self.users)
+        return {"status": "success", "message": f"User {name} created successfully"}
+
+    def remove_user(self, user_id):
+        if user_id not in self.users:
+            return {"status": "error", "message": "User not found"}
+        name = self.users[user_id].name
+        del self.users[user_id]
+        if user_id in self.debts:
+            del self.debts[user_id]
+        self.data_manager.save_users(self.users)
+        self.data_manager.save_debts(self.debts)
+        return {"status": "success", "message": f"User {name} removed successfully"}
+
+    def edit_user(self, user_id, name, pin=None):
+        if user_id not in self.users:
+            return {"status": "error", "message": "User not found"}
+        self.users[user_id].name = name
+        if pin is not None:
+            self.users[user_id].pin = pin
+        self.data_manager.save_users(self.users)
+        return {"status": "success", "message": f"User {name} updated successfully"}
+
+    def add_item(self, item_id, name, price):
+        from core.item import Item
+        if item_id in self.items:
+            return {"status": "error", "message": "Item ID already exists"}
+        try:
+            price_val = float(price)
+        except ValueError:
+            return {"status": "error", "message": "Invalid price value"}
+        self.items[item_id] = Item(item_id, name, price_val)
+        self.data_manager.save_items(self.items)
+        return {"status": "success", "message": f"Item {name} created successfully"}
+
+    def remove_item(self, item_id):
+        if item_id not in self.items:
+            return {"status": "error", "message": "Item not found"}
+        name = self.items[item_id].name
+        del self.items[item_id]
+        self.data_manager.save_items(self.items)
+        return {"status": "success", "message": f"Item {name} removed successfully"}
+
+    def edit_item(self, item_id, name, price):
+        if item_id not in self.items:
+            return {"status": "error", "message": "Item not found"}
+        try:
+            price_val = float(price)
+        except ValueError:
+            return {"status": "error", "message": "Invalid price value"}
+        self.items[item_id].name = name
+        self.items[item_id].price = price_val
+        self.data_manager.save_items(self.items)
+        return {"status": "success", "message": f"Item {name} updated successfully"}
+

core/user.py

@@ -1,14 +1,18 @@
 class User:
-    def __init__(self, id, name) -> None:
+    def __init__(self, id, name, pin="4242") -> None:
         self.id = id
         self.name = name
         self.debt = 0.0
+        self.pin = pin
 
     def to_json(self):
-        return {"id": self.id, "name": self.name, "debt": self.debt}
+        return {"id": self.id, "name": self.name, "debt": self.debt, "pin": self.pin}
 
     @staticmethod
     def from_json(data):
-        user = User(data["id"], data["name"])
+        pin = data.get("pin")
+        if pin is None:
+            pin = "4242"
+        user = User(data["id"], data["name"], pin)
         user.debt = data["debt"]
         return user

main.py

@@ -1,7 +1,7 @@
+import sys
 from core.tracker import Tracker
 from storage.data_manager import DataManager
 from config import REGISTERED_USERS, MENU_ITEMS
-from ui.cli import CLI
 
 
 def init_data(tracker, data_manager):
@@ -27,8 +27,22 @@ def main():
 
     init_data(tracker, dm)
 
-    cli = CLI(tracker)
+    if "--cli" in sys.argv:
-    cli.run()
+        from ui.cli import CLI
+        cli = CLI(tracker)
+        cli.run()
+    else:
+        try:
+            from ui.kivy import KivyUI
+            gui = KivyUI(tracker)
+            gui.run()
+        except Exception as e:
+            import traceback
+            traceback.print_exc()
+            print(f"Kivy GUI konnte nicht geladen werden ({e}). Starte CLI-Modus...")
+            from ui.cli import CLI
+            cli = CLI(tracker)
+            cli.run()
 
 
 if __name__ == "__main__":

tests/test_tracker.py

@@ -0,0 +1,79 @@
+import unittest
+from core.tracker import Tracker
+from storage.data_manager import DataManager
+from core.user import User
+from core.item import Item
+import shutil
+import os
+
+
+class TestTracker(unittest.TestCase):
+    def setUp(self):
+        self.test_dir = "test_data"
+        self.dm = DataManager(self.test_dir)
+        self.tracker = Tracker(self.dm)
+        
+        # Setup dummy user and item
+        self.tracker.users = {"test_user": User("test_user", "Test Alice")}
+        self.tracker.items = {"test_item": Item("test_item", "Test Coffee", 2.50)}
+        self.tracker.debts = {}
+        self.tracker.transactions = []
+
+    def tearDown(self):
+        if os.path.exists(self.test_dir):
+            shutil.rmtree(self.test_dir)
+
+    def test_adjust_debt_new_user(self):
+        # Verify adjust_debt does not raise KeyError on uninitialized user debt
+        res = self.tracker.adjust_debt("test_user", 2.0, "admin123")
+        self.assertEqual(res["status"], "success")
+        self.assertEqual(self.tracker.get_user_debt("test_user"), -2.0)
+
+    def test_add_purchase(self):
+        res = self.tracker.add_purchase("test_user", "test_item")
+        self.assertEqual(res["status"], "success")
+        self.assertEqual(self.tracker.get_user_debt("test_user"), 2.50)
+        self.assertEqual(len(self.tracker.transactions), 1)
+
+    def test_default_pin(self):
+        user = User("new_user", "New User")
+        self.assertEqual(user.pin, "4242")
+
+    def test_add_user(self):
+        res = self.tracker.add_user("test_user_2", "Test Bob")
+        self.assertEqual(res["status"], "success")
+        self.assertEqual(self.tracker.users["test_user_2"].name, "Test Bob")
+        self.assertEqual(self.tracker.users["test_user_2"].pin, "4242")
+    def test_remove_user(self):
+        res = self.tracker.remove_user("test_user")
+        self.assertEqual(res["status"], "success")
+        self.assertNotIn("test_user", self.tracker.users)
+        self.assertNotIn("test_user", self.tracker.debts)
+
+    def test_edit_user(self):
+        res = self.tracker.edit_user("test_user", "Updated Name", "9999")
+        self.assertEqual(res["status"], "success")
+        self.assertEqual(self.tracker.users["test_user"].name, "Updated Name")
+        self.assertEqual(self.tracker.users["test_user"].pin, "9999")
+
+    def test_add_item(self):
+        res = self.tracker.add_item("new_item", "Donut", 1.80)
+        self.assertEqual(res["status"], "success")
+        self.assertEqual(self.tracker.items["new_item"].name, "Donut")
+        self.assertEqual(self.tracker.items["new_item"].price, 1.80)
+
+    def test_remove_item(self):
+        res = self.tracker.remove_item("test_item")
+        self.assertEqual(res["status"], "success")
+        self.assertNotIn("test_item", self.tracker.items)
+
+    def test_edit_item(self):
+        res = self.tracker.edit_item("test_item", "Premium Coffee", 3.20)
+        self.assertEqual(res["status"], "success")
+        self.assertEqual(self.tracker.items["test_item"].name, "Premium Coffee")
+        self.assertEqual(self.tracker.items["test_item"].price, 3.20)
+
+
+if __name__ == "__main__":
+    unittest.main()
+

ui/cli.py

@@ -235,7 +235,9 @@ class CLI:
             print("2. Adjust user debt")
             print("3. Clear user debt")
             print("4. View transaction history")
-            print("5. Logout")
+            print("5. Manage users")
+            print("6. Manage items")
+            print("7. Logout")
             print()
 
             choice = input("Choose option: ").strip()
@@ -249,6 +251,10 @@ class CLI:
             elif choice == "4":
                 self._view_transaction_history()
             elif choice == "5":
+                self._manage_users()
+            elif choice == "6":
+                self._manage_items()
+            elif choice == "7":
                 break
             else:
                 self._invalid_choice()
@@ -357,9 +363,10 @@ class CLI:
         else:
             for t in sorted(transactions, key=lambda x: x.timestamp, reverse=True):
                 user = self.tracker.get_user_by_id(t.user_id)
-                item = self.tracker.get_items()[t.item_id]
+                item = self.tracker.get_items().get(t.item_id)
+                item_name = item.name if item else ("Adjustment" if t.item_id == "adjustment" else "Deleted Item")
                 print(
-                    f"{t.timestamp[:10]} | {user.name:.<20} {item.name:.<15} ${t.amount:.2f}"
+                    f"{t.timestamp[:10]} | {user.name:.<20} {item_name:.<15} ${t.amount:.2f}"
                 )
 
         print()
@@ -368,3 +375,226 @@ class CLI:
     def _invalid_choice(self):
         print("Invalid choice. Please try again.")
         input("Press Enter to continue...")
+
+    def _manage_users(self):
+        while True:
+            self._clear_screen()
+            print("=" * 50)
+            print("MANAGE USERS")
+            print("=" * 50)
+            print()
+            print("1. Add user")
+            print("2. Edit user")
+            print("3. Remove user")
+            print("4. Back to admin panel")
+            print()
+            choice = input("Choose option: ").strip()
+            if choice == "1":
+                self._cli_add_user()
+            elif choice == "2":
+                self._cli_edit_user()
+            elif choice == "3":
+                self._cli_remove_user()
+            elif choice == "4":
+                break
+            else:
+                self._invalid_choice()
+
+    def _cli_add_user(self):
+        self._clear_screen()
+        print("=" * 50)
+        print("ADD USER")
+        print("=" * 50)
+        print()
+        name = input("Enter new user's name: ").strip()
+        if not name:
+            print("Name cannot be empty!")
+            input("Press Enter to continue...")
+            return
+        import uuid
+        user_id = f"user_{uuid.uuid4().hex[:8]}"
+        res = self.tracker.add_user(user_id, name)
+        print(res["message"])
+        input("Press Enter to continue...")
+
+    def _cli_edit_user(self):
+        self._clear_screen()
+        print("=" * 50)
+        print("EDIT USER")
+        print("=" * 50)
+        print()
+        users = self.tracker.get_all_users()
+        user_list = list(users.items())
+        for i, (user_id, user) in enumerate(user_list, 1):
+            print(f"{i}. {user.name} (PIN: {user.pin})")
+        print(f"{len(user_list) + 1}. Cancel")
+        print()
+        try:
+            choice = int(input("Choose user to edit: ").strip())
+            if choice == len(user_list) + 1:
+                return
+            if 1 <= choice <= len(user_list):
+                user_id = user_list[choice - 1][0]
+                user = users[user_id]
+                new_name = input(f"Enter new name (leave empty to keep '{user.name}'): ").strip()
+                new_pin = input(f"Enter new PIN (leave empty to keep '{user.pin}'): ").strip()
+                name = new_name if new_name else user.name
+                pin = new_pin if new_pin else user.pin
+                if len(pin) < 4:
+                    print("PIN must be at least 4 digits!")
+                    input("Press Enter to continue...")
+                    return
+                res = self.tracker.edit_user(user_id, name, pin)
+                print(res["message"])
+                input("Press Enter to continue...")
+            else:
+                self._invalid_choice()
+        except ValueError:
+            self._invalid_choice()
+
+    def _cli_remove_user(self):
+        self._clear_screen()
+        print("=" * 50)
+        print("REMOVE USER")
+        print("=" * 50)
+        print()
+        users = self.tracker.get_all_users()
+        user_list = list(users.items())
+        for i, (user_id, user) in enumerate(user_list, 1):
+            print(f"{i}. {user.name}")
+        print(f"{len(user_list) + 1}. Cancel")
+        print()
+        try:
+            choice = int(input("Choose user to remove: ").strip())
+            if choice == len(user_list) + 1:
+                return
+            if 1 <= choice <= len(user_list):
+                user_id = user_list[choice - 1][0]
+                confirm = input(f"Are you sure you want to delete {users[user_id].name}? (y/n): ").strip().lower()
+                if confirm == "y":
+                    res = self.tracker.remove_user(user_id)
+                    print(res["message"])
+                    input("Press Enter to continue...")
+            else:
+                self._invalid_choice()
+        except ValueError:
+            self._invalid_choice()
+
+    def _manage_items(self):
+        while True:
+            self._clear_screen()
+            print("=" * 50)
+            print("MANAGE ITEMS")
+            print("=" * 50)
+            print()
+            print("1. Add item")
+            print("2. Edit item")
+            print("3. Remove item")
+            print("4. Back to admin panel")
+            print()
+            choice = input("Choose option: ").strip()
+            if choice == "1":
+                self._cli_add_item()
+            elif choice == "2":
+                self._cli_edit_item()
+            elif choice == "3":
+                self._cli_remove_item()
+            elif choice == "4":
+                break
+            else:
+                self._invalid_choice()
+
+    def _cli_add_item(self):
+        self._clear_screen()
+        print("=" * 50)
+        print("ADD ITEM")
+        print("=" * 50)
+        print()
+        name = input("Enter item name: ").strip()
+        if not name:
+            print("Name cannot be empty!")
+            input("Press Enter to continue...")
+            return
+        price_str = input("Enter price ($): ").strip()
+        try:
+            price = float(price_str)
+            if price < 0:
+                raise ValueError
+        except ValueError:
+            print("Invalid price!")
+            input("Press Enter to continue...")
+            return
+        import uuid
+        item_id = f"item_{uuid.uuid4().hex[:8]}"
+        res = self.tracker.add_item(item_id, name, price)
+        print(res["message"])
+        input("Press Enter to continue...")
+
+    def _cli_edit_item(self):
+        self._clear_screen()
+        print("=" * 50)
+        print("EDIT ITEM")
+        print("=" * 50)
+        print()
+        items = self.tracker.get_items()
+        item_list = list(items.items())
+        for i, (item_id, item) in enumerate(item_list, 1):
+            print(f"{i}. {item.name} (${item.price:.2f})")
+        print(f"{len(item_list) + 1}. Cancel")
+        print()
+        try:
+            choice = int(input("Choose item to edit: ").strip())
+            if choice == len(item_list) + 1:
+                return
+            if 1 <= choice <= len(item_list):
+                item_id = item_list[choice - 1][0]
+                item = items[item_id]
+                new_name = input(f"Enter new name (leave empty to keep '{item.name}'): ").strip()
+                new_price_str = input(f"Enter new price (leave empty to keep '${item.price:.2f}'): ").strip()
+                name = new_name if new_name else item.name
+                price = item.price
+                if new_price_str:
+                    try:
+                        price = float(new_price_str)
+                        if price < 0:
+                            raise ValueError
+                    except ValueError:
+                        print("Invalid price!")
+                        input("Press Enter to continue...")
+                        return
+                res = self.tracker.edit_item(item_id, name, price)
+                print(res["message"])
+                input("Press Enter to continue...")
+            else:
+                self._invalid_choice()
+        except ValueError:
+            self._invalid_choice()
+
+    def _cli_remove_item(self):
+        self._clear_screen()
+        print("=" * 50)
+        print("REMOVE ITEM")
+        print("=" * 50)
+        print()
+        items = self.tracker.get_items()
+        item_list = list(items.items())
+        for i, (item_id, item) in enumerate(item_list, 1):
+            print(f"{i}. {item.name} (${item.price:.2f})")
+        print(f"{len(item_list) + 1}. Cancel")
+        print()
+        try:
+            choice = int(input("Choose item to remove: ").strip())
+            if choice == len(item_list) + 1:
+                return
+            if 1 <= choice <= len(item_list):
+                item_id = item_list[choice - 1][0]
+                confirm = input(f"Are you sure you want to delete {items[item_id].name}? (y/n): ").strip().lower()
+                if confirm == "y":
+                    res = self.tracker.remove_item(item_id)
+                    print(res["message"])
+                    input("Press Enter to continue...")
+            else:
+                self._invalid_choice()
+        except ValueError:
+            self._invalid_choice()
+