Data management and updating

Tracker for updating and getting data
Datamanager to serialize/deserialize
Main for initialization
Config for config

core/tracker.py

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+from uuid import uuid4
+from core.transaction import Transaction
+
+
+class Tracker:
+    def __init__(self, data_manager) -> None:
+        self.data_manager = data_manager
+        self.users = {}
+        self.items = {}
+        self.transactions = []
+        self.debts = {}
+
+        self._load_all_data()
+
+    def _load_all_data(self):
+        self.users = self.data_manager.load_users()
+        self.items = self.data_manager.load_items()
+        self.debts = self.data_manager.load_debts()
+        self.transactions = self.data_manager.load_transactions()
+
+    def add_purchase(self, user_id, item_id):
+        if user_id not in self.users:
+            return {"status": "error", "message": "User not found"}
+
+        if item_id not in self.items:
+            return {"status": "error", "message": "Item not found"}
+
+        item = self.items[item_id]
+
+        if user_id not in self.debts:
+            self.debts[user_id] = 0.0
+        self.debts[user_id] += item.price
+
+        transaction = Transaction(str(uuid4()), user_id, item_id, item.price)
+        self.transactions.append(transaction)
+
+        self.data_manager.save_debts(self.debts)
+        self.data_manager.save_transactions(self.transactions)
+
+        return {
+            "status": "success",
+            "message": f"Added {item.name} to {self.users[user_id].name}'s debt",
+            "new_debt": self.debts[user_id],
+        }
+
+    def get_user_debt(self, user_id):
+        return self.debts.get(user_id, 0.0)
+
+    def get_all_debts(self):
+        return {
+            user_id: {
+                "name": self.users[user_id].name,
+                "debt": self.debts.get(user_id, 0.0),
+            }
+            for user_id in self.users
+        }
+
+    def adjust_debt(self, user_id, amount, admin_password):
+        if not self._verify_admin(admin_password):
+            return {"status": "error", "message": "Invalid password"}
+
+        if user_id not in self.users:
+            return {"status": "error", "message": "User not found"}
+
+        self.debts[user_id] -= amount
+        self.data_manager.save_debts(self.debts)
+
+        return {
+            "status": "success",
+            "message": f"Reduced debt by {amount}",
+            "new_debt": self.debts[user_id],
+        }
+
+    def _verify_admin(self, pwd):
+        from config import ADMIN_PASSWORD
+
+        return pwd == ADMIN_PASSWORD
+
+    def get_user_by_id(self, user_id):
+        return self.users.get(user_id)
+
+    def get_all_users(self):
+        return self.users
+
+    def get_items(self):
+        return self.items