feat: add file-based persistence and restore full app state

- implement FileDatabase<T> for loading and saving objects
- add serialize / deserialize methods to all model classes
- add foreign key relationships among classes alongside object ownership
- replace object references and usernames with persistent IDs
- replace users map from username key to userId key
- load full state on startup and persist state on shutdown
- re-link users, restaurants, menu items, orders, items, and assignments after load
- fix: add order to controller m_orders
- refactor: store shared pointer to MenuItem in Item, not a reference
- refactor: store shared pointer to Order in DeliveryAssignment
- refactor: remove customer username from Order
- add initial snapshot files for users, restaurants, and menu items
- add empty snapshot files for remaining persisted entities

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Customer.h

@@ -24,6 +24,15 @@ public:
         const std::string& email,
         const std::string& address) :
         User(username, name, phone, password, email, address)
+    {}
+    Customer(int id,
+        const std::string& username,
+        const std::string& name,
+        const std::string& phone,
+        const std::string& password,
+        const std::string& email,
+        const std::string& address) :
+        User(id, username, name, phone, password, email, address)
     {}
 	void addOrder(std::shared_ptr<Order>);
 	orders& getOrders();

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/DeliveryAssignment.cpp

@@ -3,8 +3,21 @@ Author: Joel Mathew Thomas
 Date: 18-02-2026
 */
 
+#include <sstream>
 #include "DeliveryAssignment.h"
 
+DeliveryAssignment::DeliveryAssignment(int id, DeliveryStatus status, int orderId, int deliveryPartnerId) :
+	m_id(id),
+	m_status(status),
+	m_orderId(orderId),
+	m_deliveryPartnerId(deliveryPartnerId)
+{
+	if (id > m_uid)
+	{
+		m_uid = id;
+	}
+}
+
 int DeliveryAssignment::m_uid = 0;
 
 int DeliveryAssignment::getId() const
@@ -22,7 +35,85 @@ void DeliveryAssignment::setStatus(const DeliveryStatus& status)
 	m_status = status;
 }
 
-Order& DeliveryAssignment::getOrder()
+std::shared_ptr<Order> DeliveryAssignment::getOrder()
 {
 	return m_order;
 }
+
+void DeliveryAssignment::setOrder(std::shared_ptr<Order> order)
+{
+	m_order = order;
+}
+
+int DeliveryAssignment::getDeliveryPartnerId() const
+{
+	return m_deliveryPartnerId;
+}
+
+void DeliveryAssignment:: setDeliveryPartnerId(int deliveryPartnerId)
+{
+	m_deliveryPartnerId = deliveryPartnerId;
+}
+
+int DeliveryAssignment::getOrderId() const
+{
+	return m_orderId;
+}
+
+std::string DeliveryAssignment::serialize() const
+{
+    std::ostringstream serializedDeliveryAssignment;
+    serializedDeliveryAssignment << m_id << '|'
+        << static_cast<int>(m_status) << '|'
+        << m_orderId << '|'
+        << m_deliveryPartnerId;
+    return serializedDeliveryAssignment.str();
+}
+
+std::shared_ptr<DeliveryAssignment> DeliveryAssignment::deserialize(const std::string& record)
+{
+    int id, orderId, deliveryPartnerId;
+    DeliveryStatus status;
+    std::string token;
+    std::istringstream serializedDeliveryAssignment(record);
+    getline(serializedDeliveryAssignment, token, '|');
+    try {
+        id = std::stoi(token);
+    }
+    catch (...)
+    {
+        throw std::runtime_error("Invalid DeliveryAssignment ID in snapshot");
+    }
+    getline(serializedDeliveryAssignment, token, '|');
+    int statusInt = std::stoi(token);
+    if (statusInt < static_cast<int>(DeliveryStatus::CREATED) ||
+        statusInt > static_cast<int>(DeliveryStatus::DELIVERED))
+    {
+        throw std::runtime_error("Invalid DeliveryStatus for DeliveryAssignment in snapshot");
+    }
+    status = static_cast<DeliveryStatus>(statusInt);
+    getline(serializedDeliveryAssignment, token, '|');
+    try {
+        orderId = std::stoi(token);
+    }
+    catch (...)
+    {
+        throw std::runtime_error("Invalid Order ID for DeliveryAssignment in snapshot");
+    }
+    getline(serializedDeliveryAssignment, token, '|');
+    try {
+        deliveryPartnerId = std::stoi(token);
+    }
+    catch (...)
+    {
+        throw std::runtime_error("Invalid DeliveryPartner ID for DeliveryAssignment in snapshot");
+    }
+    if (status == DeliveryStatus::CREATED)
+    {
+        return std::make_shared<DeliveryAssignment>(id, status, orderId, 0);
+    }
+    else
+    {
+        return std::make_shared<DeliveryAssignment>(id, status, orderId, deliveryPartnerId);
+    }
+}

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/DeliveryAssignment.h

@@ -4,6 +4,7 @@ Date: 18-12-2026
 */
 
 #pragma once
+#include <memory>
 #include "Order.h"
 
 enum class DeliveryStatus
@@ -18,17 +19,34 @@ class DeliveryAssignment
 private:
 	static int m_uid;
 	int m_id;
-	Order& m_order;
+	std::shared_ptr<Order> m_order;
 	DeliveryStatus m_status;
+	int m_orderId;
+	int m_deliveryPartnerId;
 public:
-	DeliveryAssignment(Order& order) :
+	DeliveryAssignment() :
+		m_id(++m_uid),
+		m_status(DeliveryStatus::CREATED),
+		m_orderId(0),
+		m_deliveryPartnerId(0)
+	{}
+	DeliveryAssignment(std::shared_ptr<Order> order, int orderId) :
 		m_id(++m_uid),
 		m_order(order),
-		m_status(DeliveryStatus::CREATED)
+		m_status(DeliveryStatus::CREATED),
+		m_orderId(orderId),
+		m_deliveryPartnerId(0)
 	{}
 	int getId() const;
 	DeliveryStatus getStatus() const;
 	void setStatus(const DeliveryStatus&);
-	Order& getOrder();
+	std::shared_ptr<Order> getOrder();
+	void setOrder(std::shared_ptr<Order>);
+	int getDeliveryPartnerId() const;
+	void setDeliveryPartnerId(int);
+	int getOrderId() const;
+	std::string serialize() const;
+	static std::shared_ptr<DeliveryAssignment> deserialize(const std::string&);
+	DeliveryAssignment(int, DeliveryStatus, int, int);
 };
 

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/DeliveryPartner.h

@@ -24,6 +24,15 @@ public:
         const std::string& email,
         const std::string& address) :
         User(username, name, phone, password, email, address)
+    {}
+    DeliveryPartner(int id,
+        const std::string& username,
+        const std::string& name,
+        const std::string& phone,
+        const std::string& password,
+        const std::string& email,
+        const std::string& address) :
+        User(id, username, name, phone, password, email, address)
     {}
 	void acceptDeliveryAssignment(std::shared_ptr<DeliveryAssignment>);
 	deliveryAssignments& getAssignedDeliveries();

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/FileDatabase.h

@@ -1,5 +1,55 @@
+/*
+Author: Joel Mathew Thomas
+Date: 22-12-2026
+*/
+
 #pragma once
+#include<iostream>
+#include<memory>
+#include<map>
+#include<fstream>
+#include<string>
+#include<stdexcept>
+template <typename T> using objects = std::map<int, std::shared_ptr<T>>;
+
+template <typename T>
 class FileDatabase
 {
+private:
+	std::string m_filePath;
+public:
+	FileDatabase() : m_filePath("") {}
+	FileDatabase(const std::string& filePath) : m_filePath(filePath) {}
+	objects<T> load();
+	void save(const objects<T>&);
 };
 
+template <typename T>
+objects<T> FileDatabase<T>::load()
+{
+	objects<T> records;
+	std::ifstream file(m_filePath);
+	if (!file.is_open())
+		throw std::runtime_error("Failed to open file " + m_filePath);
+
+	std::string record;
+	while (std::getline(file, record))
+	{
+		auto object = T::deserialize(record);
+		records[object->getId()] = object;
+	}
+	return records;
+}
+
+template <typename T>
+void FileDatabase<T>::save(const objects<T>& records)
+{
+	std::ofstream file(m_filePath, std::ios::trunc);
+	if (!file.is_open())
+		throw std::runtime_error("Failed to open file " + m_filePath);
+
+	for (const auto& recordPair : records)
+	{
+		file << recordPair.second->serialize() << '\n';
+	}
+}

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/FoodDeliveryController.cpp

@@ -20,6 +20,7 @@ Date: 19-02-2026
 #include "DeliveryAssignment.h"
 #include "inputHelper.h"
 #include "outputHelper.h"
+#include "FileDatabase.h"
 
 static bool checkAccess(std::shared_ptr<User> user, const std::string& userWithAccess)
 {
@@ -37,7 +38,7 @@ static restaurants::iterator pickRestaurantFromRestaurants(restaurants& ownerRes
 	int restaurantIndex = 1, restaurantChoiceIndex;
 	if (ownerRestaurants.empty())
 	{
-		std::cout << "You do not own any Restaurants!\n";
+		std::cout << "No Restaurants available!\n";
 		return ownerRestaurants.end();
 	}
 	std::cout << "Pick a Restaurant\n";
@@ -197,8 +198,8 @@ static deliveryAssignments::iterator pickAssignmentFromDeliveryAssignments(deliv
 		<< "\n";
 	for (auto& assignment : assignments)
 	{
-		Order& order = assignment.second->getOrder();
+		Order& order = *(assignment.second->getOrder());
-		users::const_iterator customer = allUsers.find(order.getCustomerUsername());
+		users::const_iterator customer = allUsers.find(order.getCustomerId());
 		if (customer == allUsers.end())
 		{
 			throw std::runtime_error("Invalid state: Delivery Assignment has no associated Customer.");
@@ -223,9 +224,159 @@ static deliveryAssignments::iterator pickAssignmentFromDeliveryAssignments(deliv
 	return assignmentIterator;
 }
 
+void FoodDeliveryController::loadStates()
+{
+	FileDatabase<User> userDatabase("users.txt");
+	FileDatabase<Restaurant> restaurantDatabase("restaurants.txt");
+	FileDatabase<MenuItem> menuItemDatabase("menuItems.txt");
+	FileDatabase<Order> orderDatabase("orders.txt");
+	FileDatabase<Item> itemDatabase("items.txt");
+	FileDatabase<DeliveryAssignment> deliveryAssignmentsDatabase("assignments.txt");
+	objects<MenuItem> menuItems;
+	objects<Item> items;
+	m_users = userDatabase.load();
+	m_restaurants = restaurantDatabase.load();
+	for (const auto& restaurantPair : m_restaurants)
+	{
+		Restaurant& restaurant = *(restaurantPair.second);
+		int ownerId = restaurant.getOwnerId();
+		auto userIterator = m_users.find(ownerId);
+		if (userIterator == m_users.end())
+			throw std::runtime_error("Restaurant has invalid owner ID");
+		auto owner = std::dynamic_pointer_cast<RestaurantOwner>(userIterator->second);
+		if (!owner)
+		{
+			throw std::runtime_error("Restaurant owner is not a RestaurantOwner");
+		}
+		owner->addRestaurant(restaurantPair.second);
+	}
+	menuItems = menuItemDatabase.load();
+	for (auto& menuItemPair : menuItems)
+	{
+		auto restaurantIterator = m_restaurants.find(menuItemPair.second->getRestaurantId());
+		if (restaurantIterator != m_restaurants.end())
+		{
+			restaurantIterator->second->addMenuItem(*(menuItemPair.second));
+		}
+		else
+		{
+			throw std::runtime_error("MenuItem has invalid Restaurant ID");
+		}
+	}
+	m_orders = orderDatabase.load();
+	for (auto& orderPair : m_orders)
+	{
+		int customerId = orderPair.second->getCustomerId();
+		int restaurantId = orderPair.second->getRestaurantId();
+		auto customerIterator = m_users.find(customerId);
+		if (customerIterator == m_users.end())
+		{
+			throw std::runtime_error("Order has invalid customer ID");
+		}
+		auto customer = std::dynamic_pointer_cast<Customer>(customerIterator->second);
+		if (!customer)
+		{
+			throw std::runtime_error("User associated with Order is not a Customer");
+		}
+		customer->addOrder(orderPair.second);
+		auto restaurantIterator = m_restaurants.find(restaurantId);
+		if (restaurantIterator == m_restaurants.end())
+		{
+			throw std::runtime_error("Order has invalid restaurant ID");
+		}
+		restaurantIterator->second->addOrder(orderPair.second);
+	}
+	items = itemDatabase.load();
+	for (auto& itemPair : items)
+	{
+		int itemId = itemPair.second->getMenuItemId();
+		auto menuItemiterator = menuItems.find(itemId);
+		if (menuItemiterator != menuItems.end())
+		{
+			itemPair.second->setMenuItem(menuItemiterator->second);
+		}
+		else
+		{
+			throw std::runtime_error("Item has invalid MenuItem ID");
+		}
+		int orderId = itemPair.second->getOrderId();
+		auto orderIterator = m_orders.find(orderId);
+		if (orderIterator != m_orders.end())
+		{
+			orderIterator->second->addItem(*(itemPair.second));
+		}
+		else
+		{
+			throw std::runtime_error("Item has invalid Order ID");
+		}
+	}
+	m_assignments = deliveryAssignmentsDatabase.load();
+	for (auto& assignmentPair : m_assignments)
+	{
+		int orderId = assignmentPair.second->getOrderId();
+		int deliveryPartnerId = assignmentPair.second->getDeliveryPartnerId();
+		auto orderIterator = m_orders.find(orderId);
+		if (orderIterator != m_orders.end())
+		{
+			assignmentPair.second->setOrder(orderIterator->second);
+		}
+		else
+		{
+			throw std::runtime_error("Delivery Assignment has invalid Order ID");
+		}
+		if (deliveryPartnerId != 0)
+		{
+			auto userIterator = m_users.find(deliveryPartnerId);
+			if (userIterator == m_users.end())
+			{
+				throw std::runtime_error("Order has invalid Delivery Partner ID");
+			}
+			auto deliveryPartner = std::dynamic_pointer_cast<DeliveryPartner>(userIterator->second);
+			if (!deliveryPartner)
+			{
+				throw std::runtime_error("User associated with Order is not a Delivery Partner");
+			}
+			deliveryPartner->acceptDeliveryAssignment(assignmentPair.second);
+		}
+	}
+}
+
+void FoodDeliveryController::persistStates()
+{
+	FileDatabase<User> userDatabase("users.txt");
+	FileDatabase<Restaurant> restaurantDatabase("restaurants.txt");
+	FileDatabase<MenuItem> menuItemDatabase("menuItems.txt");
+	FileDatabase<Order> orderDatabase("orders.txt");
+	FileDatabase<Item> itemDatabase("items.txt");
+	FileDatabase<DeliveryAssignment> deliveryAssignmentsDatabase("assignments.txt");
+	userDatabase.save(m_users);
+	restaurantDatabase.save(m_restaurants);
+	objects<MenuItem> allMenuItems;
+	objects<Item> allItems;
+	for (const auto& restaurantPair : m_restaurants)
+	{
+		for (const auto& menuItemPair : restaurantPair.second->getMenuItems())
+		{
+			allMenuItems[menuItemPair.first] = menuItemPair.second;
+		}
+	}
+	menuItemDatabase.save(allMenuItems);
+	orderDatabase.save(m_orders);
+	for (const auto& orderPair : m_orders)
+	{
+		for (const auto& item : orderPair.second->getItems())
+		{
+			allItems[item->getId()] = item;
+		}
+	}
+	itemDatabase.save(allItems);
+	deliveryAssignmentsDatabase.save(m_assignments);
+}
+
 void FoodDeliveryController::run()
 {
 	bool isMenuActive = true;
+	loadStates();
 	while (isMenuActive)
 	{
 		int choice;
@@ -262,17 +413,25 @@ void FoodDeliveryController::run()
 			util::pressEnter();
 		}
 	}
+	persistStates();
 }
 
 void FoodDeliveryController::login()
 {
 	util::clear();
 	std::string username, password;
-	std::cout << "Enter username: ";;
+	std::cout << "Enter username: ";
 	util::readString(username);
-	std::cout << "Enter password: ";;
+	std::cout << "Enter password: ";
 	util::readString(password);
-	users::iterator userIterator = m_users.find(username);
+	users::iterator userIterator = std::find_if(
+		m_users.begin(),
+		m_users.end(),
+		[&username](const auto& pair)
+		{
+			return pair.second->getUsername() == username;
+		}
+	);
 	if (userIterator != m_users.end())
 	{
 		User& user = *(userIterator->second);
@@ -318,7 +477,15 @@ void FoodDeliveryController::registerUser()
 		util::clear();
 		std::cout << "Enter Username: ";
 		util::readString(username);
-		if (m_users.find(username) != m_users.end())
+		users::iterator userIterator = std::find_if(
+			m_users.begin(),
+			m_users.end(),
+			[&username](const auto& pair)
+			{
+				return pair.second->getUsername() == username;
+			}
+		);
+		if (userIterator != m_users.end())
 		{
 			std::cout << "User Already Exists!\n";
 			return;
@@ -343,23 +510,29 @@ void FoodDeliveryController::registerUser()
 				"4. Cancel\n"
 				"Choice?: ";
 			util::readValue<int>(choice);
-			switch (choice)
+			if (choice == 1)
+			{
+				std::shared_ptr<User> user = std::make_shared<RestaurantOwner>(username, name, phone, password, email, address);
+				m_users[user->getId()] = user;
+			}
+			else if (choice == 2)
+			{
+				std::shared_ptr<User> user = std::make_shared<Customer>(username, name, phone, password, email, address);
+				m_users[user->getId()] = user;
+			}
+			else if (choice == 3)
+			{
+				std::shared_ptr<User> user = std::make_shared<DeliveryPartner>(username, name, phone, password, email, address);
+				m_users[user->getId()] = user;
+			}
+			else if (choice == 4)
 			{
-			case 1:
-				m_users[username] = std::make_shared<RestaurantOwner>(username, name, phone, password, email, address);
-				break;
-			case 2:
-				m_users[username] = std::make_shared<Customer>(username, name, phone, password, email, address);
-				break;
-			case 3:
-				m_users[username] = std::make_shared<DeliveryPartner>(username, name, phone, password, email, address);
-				break;
-			case 4:
 				return;
-			default:
+			}
+			else
+			{
 				util::clear();
 				std::cout << "Invalid Choice! Try Again\n";
-				continue;
 			}
 			break;
 		}
@@ -411,7 +584,7 @@ void FoodDeliveryController::addNewRestaurant()
 	RestaurantOwner& restaurantOwner = *(std::dynamic_pointer_cast<RestaurantOwner>(m_authenticatedUser));
 	std::cout << "Enter Restaurant Name: ";
 	util::readString(name);
-	std::shared_ptr<Restaurant> restaurant = std::make_shared<Restaurant>(name);
+	std::shared_ptr<Restaurant> restaurant = std::make_shared<Restaurant>(name, restaurantOwner.getId());
 	m_restaurants[restaurant->getId()] = restaurant;
 	restaurantOwner.addRestaurant(restaurant);
 	std::cout << "Restaurant " << restaurant->getName() << " with ID " << restaurant->getId() << " created successfully\n";
@@ -489,7 +662,7 @@ void FoodDeliveryController::listRestaurantOrders() const
 					<< "\n";
 				for (auto& item : orderItems)
 				{
-					MenuItem& menuItem = item->getMenuItem();
+					MenuItem& menuItem = *(item->getMenuItem());
 					std::cout << std::left << std::setw(25) << menuItem.getName()
 						<< std::left << std::setw(10) << menuItem.getPrice()
 						<< std::left << std::setw(10) << item->getQuantity()
@@ -542,7 +715,7 @@ void FoodDeliveryController::markOrderReady()
 				if (orderStatus == OrderStatus::CREATED)
 				{
 					orderIterator->second->setStatus(OrderStatus::READYFORPICKUP);
-					std::shared_ptr<DeliveryAssignment> deliveryAssignment = std::make_shared<DeliveryAssignment>(*orderIterator->second);
+					std::shared_ptr<DeliveryAssignment> deliveryAssignment = std::make_shared<DeliveryAssignment>(orderIterator->second, orderIterator->second->getId());
 					m_assignments[deliveryAssignment->getId()] = deliveryAssignment;
 					std::cout << "Order has been marked ready for pickup\n";
 				}
@@ -638,7 +811,7 @@ void FoodDeliveryController::addMenuItem() const
 			util::readString(description);
 			std::cout << "Enter Item Price: ";
 			util::readValue<double>(price);
-			MenuItem menuItem(name, description, price);
+			MenuItem menuItem(name, description, price, restaurantIterator->second->getId());
 			restaurantIterator->second->addMenuItem(menuItem);
 			std::cout << "Added new Menu Item " << menuItem.getName() << " with ID " << menuItem.getId() << " to Restaurant " << restaurantIterator->second->getName() << " successfully\n";
 		}
@@ -728,7 +901,7 @@ void FoodDeliveryController::listCustomerOrders() const
 				<< "\n";
 			for (auto& item : orderItems)
 			{
-				MenuItem& menuItem = item->getMenuItem();
+				MenuItem& menuItem = *(item->getMenuItem());
 				std::cout << std::left << std::setw(25) << menuItem.getName()
 					<< std::left << std::setw(10) << menuItem.getPrice()
 					<< std::left << std::setw(10) << item->getQuantity()
@@ -794,9 +967,9 @@ void FoodDeliveryController::placeOrder()
 					{
 						if (!order)
 						{
-							order = std::make_shared<Order>(customer->getName());
+							order = std::make_shared<Order>(restaurantIterator->second->getId(), customer->getId());
 						}
-						order->addItem(Item(*(menuItemIterator->second), quantity));
+						order->addItem(Item(menuItemIterator->second, menuItemIterator->second->getId(), quantity, order->getId()));
 						std::cout << menuItemIterator->second->getName() << " with quantity " << quantity << " has been added to your Order\n";
 					}
 					else
@@ -820,6 +993,7 @@ void FoodDeliveryController::placeOrder()
 			{
 				customer->addOrder(order);
 				restaurantIterator->second->addOrder(order);
+				m_orders[order->getId()] = order;
 				std::cout << "Order with ID " << order->getId() << " has been placed successfully\n";
 			}
 			else
@@ -912,8 +1086,8 @@ void FoodDeliveryController::listDeliveryAssignments()
 			<< "\n";
 		for (auto& assignment : assignments)
 		{
-			Order& order = assignment.second->getOrder();
+			Order& order = *(assignment.second->getOrder());
-			users::const_iterator customer = m_users.find(order.getCustomerUsername());
+			users::const_iterator customer = m_users.find(order.getCustomerId());
 			if (customer == m_users.end())
 			{
 				throw std::runtime_error("Invalid state: Delivery Assignment has no associated Customer.");
@@ -957,7 +1131,8 @@ void FoodDeliveryController::acceptDeliveryAssignment()
 			if (deliveryStatus == DeliveryStatus::CREATED)
 			{
 				assignmentIterator->second->setStatus(DeliveryStatus::ACCEPTED);
-				assignmentIterator->second->getOrder().setStatus(OrderStatus::OUTFORDELIVERY);
+				assignmentIterator->second->setDeliveryPartnerId(deliveryPartner->getId());
+				assignmentIterator->second->getOrder()->setStatus(OrderStatus::OUTFORDELIVERY);
 				deliveryPartner->acceptDeliveryAssignment(assignmentIterator->second);
 				std::cout << "Delivery Assignment " << assignmentIterator->second->getId() << " has been accepted successfully!\n";
 			}
@@ -977,9 +1152,8 @@ void FoodDeliveryController::acceptDeliveryAssignment()
 	}
 }
 
-void FoodDeliveryController::confirmDeliveryAssignment()
+void FoodDeliveryController::confirmDeliveryAssignment() const
 {
-
 	try
 	{
 		util::clear();
@@ -1005,7 +1179,7 @@ void FoodDeliveryController::confirmDeliveryAssignment()
 			if (deliveryStatus == DeliveryStatus::ACCEPTED)
 			{
 				assignmentIterator->second->setStatus(DeliveryStatus::DELIVERED);
-				assignmentIterator->second->getOrder().setStatus(OrderStatus::DELIVERED);
+				assignmentIterator->second->getOrder()->setStatus(OrderStatus::DELIVERED);
 				std::cout << "Delivery Assignment " << assignmentIterator->second->getId() << " has been completed successfully!\n";
 			}
 			else
@@ -1030,7 +1204,8 @@ void FoodDeliveryController::viewProfile() const
 	{
 		util::clear();
 		std::cout << "My Profile\n";
-		std::cout << std::left << std::setw(10) << "Name " << ":  " << m_authenticatedUser->getName() << "\n"
+		std::cout << std::left << std::setw(10) << "ID " << ":  " << m_authenticatedUser->getId() << "\n"
+			<< std::setw(10) << "Name " << ":  " << m_authenticatedUser->getName() << "\n"
 			<< std::left << std::setw(10) << "Username " << ":  " <<  m_authenticatedUser->getUsername() << "\n"
 			<< std::left << std::setw(10) << "Phone " << ":  " << m_authenticatedUser->getPhone() << "\n"
 			<< std::left << std::setw(10) << "Email " << ":  " << m_authenticatedUser->getEmail() << "\n"

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/FoodDeliveryController.h

@@ -16,7 +16,7 @@ class Item;
 class Order;
 class DeliveryAssignment;
 
-using users = std::map<std::string, std::shared_ptr<User>>;
+using users = std::map<int, std::shared_ptr<User>>;
 using restaurants = std::map<int, std::shared_ptr<Restaurant>>;
 using menuItems = std::map<int, std::shared_ptr<MenuItem>>;
 using items = std::vector<std::shared_ptr<Item>>;
@@ -31,6 +31,8 @@ private:
 	orders m_orders;
 	deliveryAssignments m_assignments;
 	std::shared_ptr<User> m_authenticatedUser;
+	void loadStates();
+	void persistStates();
 public:
 	void run();
 	void login();
@@ -48,7 +50,7 @@ public:
 	void cancelOrder() const;
 	void listDeliveryAssignments();
 	void acceptDeliveryAssignment();
-	void confirmDeliveryAssignment();
+	void confirmDeliveryAssignment() const;
 	void viewProfile() const;
 };
 

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Item.cpp

@@ -3,14 +3,98 @@ Author: Joel Mathew Thomas
 Date: 18-02-2026
 */
 
+#include <sstream>
+#include <string>
 #include "Item.h"
 
+Item::Item(int id, std::shared_ptr<MenuItem> item, int itemId, int quantity, int orderId)
+    : m_id(id), m_item(item), m_quantity(quantity), m_orderId(orderId), m_itemId(itemId) 
+{
+    if (id > m_uid)
+    {
+        m_uid = id;
+    }
+}
+
+int Item::m_uid = 0;
+
+int Item::getId() const
+{
+	return m_id;
+}
+
 int Item::getQuantity() const
 {
 	return m_quantity;
 }
 
-MenuItem& Item::getMenuItem()
+std::shared_ptr<MenuItem> Item::getMenuItem()
 {
 	return m_item;
 }
+
+int Item::getOrderId() const
+{
+	return m_orderId;
+}
+
+int Item::getMenuItemId() const
+{
+	return m_itemId;
+}
+
+void Item::setMenuItem(std::shared_ptr<MenuItem> menuItem)
+{
+	m_item = menuItem;
+}
+
+std::string Item::serialize() const
+{
+    std::ostringstream serializedItem;
+    serializedItem << m_id << '|'
+        << m_quantity << '|'
+        << m_orderId << '|'
+        << m_itemId;
+    return serializedItem.str();
+}
+
+std::shared_ptr<Item> Item::deserialize(const std::string& record)
+{
+    int id, quantity, orderId, itemId;
+    std::string token;
+    std::istringstream serializedItem(record);
+    getline(serializedItem, token, '|');
+    try {
+        id = std::stoi(token);
+    }
+    catch (...)
+    {
+        throw std::runtime_error("Invalid Item ID in snapshot");
+    }
+    getline(serializedItem, token, '|');
+    try {
+        quantity = std::stoi(token);
+    }
+    catch (...)
+    {
+        throw std::runtime_error("Invalid Quantity in Item in snapshot");
+    }
+    getline(serializedItem, token, '|');
+    try {
+        orderId = std::stoi(token);
+    }
+    catch (...)
+    {
+        throw std::runtime_error("Invalid Order ID in Item in snapshot");
+    }
+    getline(serializedItem, token, '|');
+    try {
+        itemId = std::stoi(token);
+    }
+    catch (...)
+    {
+        throw std::runtime_error("Invalid MenuItem ID in Item in snapshot");
+    }
+    return std::make_shared<Item>(id, std::make_shared<MenuItem>(), itemId, quantity, orderId);
+}
+

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Item.h

@@ -4,18 +4,29 @@ Date: 18-12-2026
 */
 
 #pragma once
+#include <memory>
 #include "MenuItem.h"
 
 class Item
 {
 private:
-    MenuItem& m_item;
+    static int m_uid;
+    int m_id;
+    std::shared_ptr<MenuItem> m_item;
     int m_quantity;
-
+    int m_orderId;
+    int m_itemId;
 public:
-    Item(MenuItem& item, int quantity)
+    Item() : m_id(++m_uid), m_quantity(0), m_orderId(0), m_itemId(0) {}
-        : m_item(item), m_quantity(quantity)
+    Item(std::shared_ptr<MenuItem> item, int itemId, int quantity, int orderId)
-    {}
+        : m_id(++m_uid), m_item(item), m_quantity(quantity), m_orderId(orderId), m_itemId(itemId) {}
+    Item(int, std::shared_ptr<MenuItem>, int, int, int);
+    int getId() const;
     int getQuantity() const;
-    MenuItem& getMenuItem();
+    std::shared_ptr<MenuItem> getMenuItem();
+    int getOrderId() const;
+    int getMenuItemId() const;
+    void setMenuItem(std::shared_ptr<MenuItem>);
+	std::string serialize() const;
+	static std::shared_ptr<Item> deserialize(const std::string&);
 };

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/MenuItem.cpp

@@ -3,11 +3,26 @@ Author: Joel Mathew Thomas
 Date: 18-02-2026
 */
 
+#include <sstream>
 #include <stdexcept>
 #include "MenuItem.h"
 
 int MenuItem::m_uid = 0;
 
+
+MenuItem::MenuItem(int id, const std::string& name, const std::string& description, double price, int restaurantId):
+	m_id(id),
+	m_name(name),
+	m_description(description),
+	m_price(price),
+	m_restaurantId(restaurantId)
+{
+	if (id > m_uid)
+	{
+		m_uid = id;
+	}
+}
+
 int MenuItem::getId() const
 {
 	return m_id;
@@ -37,3 +52,51 @@ void MenuItem::setPrice(double price)
 	}
 	m_price = price;
 }
+
+int MenuItem::getRestaurantId() const
+{
+	return m_restaurantId;
+}
+
+std::string MenuItem::serialize() const
+{
+    std::ostringstream serializedMenuItem;
+    serializedMenuItem << m_id << '|'
+        << m_name << '|'
+        << m_description << '|'
+        << m_price << '|'
+        << m_restaurantId;
+    return serializedMenuItem.str();
+}
+
+std::shared_ptr<MenuItem> MenuItem::deserialize(const std::string& record)
+{
+    int id, restaurantId;
+    double price;
+    std::string name, description, token;
+    std::istringstream serializedMenuItem(record);
+    getline(serializedMenuItem, token, '|');
+    try {
+        id = std::stoi(token);
+    }
+    catch (...) {
+        throw std::runtime_error("Invalid MenuItem ID in snapshot");
+    }
+    getline(serializedMenuItem, name, '|');
+    getline(serializedMenuItem, description, '|');
+    getline(serializedMenuItem, token, '|');
+    try {
+        price = std::stod(token);
+    }
+    catch (...) {
+        throw std::runtime_error("Invalid Price for MenuItem in snapshot");
+    }
+    getline(serializedMenuItem, token, '|');
+    try {
+        restaurantId = std::stoi(token);
+    }
+    catch (...) {
+        throw std::runtime_error("Invalid Restaurant ID for MenuItem in snapshot");
+    }
+    return std::make_shared<MenuItem>(id, name, description, price, restaurantId);
+}

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/MenuItem.h

@@ -5,6 +5,7 @@ Date: 18-12-2026
 
 #pragma once
 #include <string>
+#include <memory>
 
 class MenuItem
 {
@@ -14,23 +15,29 @@ private:
 	std::string m_name;
 	std::string m_description;
 	double m_price;
+	int m_restaurantId;
 public:
 	MenuItem():
 		m_id(++m_uid),
 		m_name(""),
 		m_description(""),
-		m_price(0)
+		m_price(0),
+		m_restaurantId(0)
 	{}
-	MenuItem(const std::string& name, const std::string& description, double price):
+	MenuItem(const std::string& name, const std::string& description, double price, int restaurantId):
 		m_id(++m_uid),
 		m_name(name),
 		m_description(description),
-		m_price(price)
+		m_price(price),
+		m_restaurantId(restaurantId)
 	{}
+	MenuItem(int, const std::string&, const std::string&, double, int);
 	int getId() const;
 	std::string getName() const;
 	std::string getDescription() const;
 	double getPrice() const;
 	void setPrice(double);
+	int getRestaurantId() const;
+	std::string serialize() const;
+	static std::shared_ptr<MenuItem> deserialize(const std::string&);
 };
-

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Order.cpp

@@ -1,7 +1,27 @@
+/*
+Author: Joel Mathew Thomas
+Date: 18-12-2026
+*/
+
+#include <sstream>
+#include <stdexcept>
 #include "Order.h"
 
 int Order::m_uid = 0;
 
+
+Order::Order(int id, OrderStatus status, int restaurantId,int customerId):
+	m_id(id),
+	m_status(status),
+	m_customerId(customerId),
+	m_restaurantId(restaurantId)
+{
+	if (id > m_uid)
+	{
+		m_uid = id;
+	}
+}
+
 int Order::getId() const
 {
 	return m_id;
@@ -22,7 +42,7 @@ double Order::getTotal() const
 	double total = 0;
 	for (auto& itemPointer : m_items)
 	{
-		total += itemPointer->getMenuItem().getPrice() * itemPointer->getQuantity();
+		total += itemPointer->getMenuItem()->getPrice() * itemPointer->getQuantity();
 	}
 	return total;
 }
@@ -37,7 +57,63 @@ void Order::setStatus(const OrderStatus& orderStatus)
 	m_status = orderStatus;
 }
 
-const std::string& Order::getCustomerUsername()
+int Order::getCustomerId() const
 {
-	return m_customerUsername;
+	return m_customerId;
+}
+
+int Order::getRestaurantId() const
+{
+	return m_restaurantId;
+}
+
+std::string Order::serialize() const
+{
+    std::ostringstream serializedOrder;
+    serializedOrder << m_id << '|'
+        << static_cast<int>(m_status) << '|'
+        << m_customerId << '|'
+        << m_restaurantId;
+    return serializedOrder.str();
+}
+
+std::shared_ptr<Order> Order::deserialize(const std::string& record)
+{
+    int id, customerId, restaurantId;
+    OrderStatus status;
+    std::string token;
+    std::istringstream serializedOrder(record);
+    getline(serializedOrder, token, '|');
+    try {
+        id = std::stoi(token);
+    }
+    catch (...) 
+    {
+        throw std::runtime_error("Invalid Order ID in snapshot");
+    }
+    getline(serializedOrder, token, '|');
+    int statusInt = std::stoi(token);
+    if (statusInt < static_cast<int>(OrderStatus::CREATED) ||
+        statusInt > static_cast<int>(OrderStatus::CANCELLED))
+    {
+        throw std::runtime_error("Invalid Order Status for Order in snapshot");
+    }
+    status = static_cast<OrderStatus>(statusInt);
+    getline(serializedOrder, token, '|');
+    try {
+        customerId = std::stoi(token);
+    }
+    catch (...) 
+    {
+        throw std::runtime_error("Invalid Customer ID for Order in snapshot");
+    }
+    getline(serializedOrder, token, '|');
+    try {
+        restaurantId = std::stoi(token);
+    }
+    catch (...) 
+    {
+        throw std::runtime_error("Invalid Restaurant ID for Order in snapshot");
+    }
+    return std::make_shared<Order>(id, status, restaurantId, customerId);
 }

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Order.h

@@ -26,22 +26,26 @@ private:
 	static int m_uid;
 	int m_id;
 	items m_items;
-	double m_totalAmount;
 	OrderStatus m_status;
-	std::string m_customerUsername;
+	int m_customerId;
+	int m_restaurantId;
 public:
-	Order(const std::string& customerUsername) :
+	Order(int restaurantId, int customerId) :
 		m_id(++m_uid),
-		m_totalAmount(0),
 		m_status(OrderStatus::CREATED),
-		m_customerUsername(customerUsername)
+		m_customerId(customerId),
+		m_restaurantId(restaurantId)
 	{}
+	Order(int, OrderStatus, int, int);
 	int getId() const;
 	void addItem(const Item&);
 	items& getItems();
 	double getTotal() const;
 	OrderStatus getStatus() const;
 	void setStatus(const OrderStatus&);
-	const std::string& getCustomerUsername();
+	int getCustomerId() const;
+	int getRestaurantId() const;
+	std::string serialize() const;
+	static std::shared_ptr<Order> deserialize(const std::string&);
 };
 

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Restaurant.cpp

@@ -3,10 +3,23 @@ Author: Joel Mathew Thomas
 Date: 18-02-2026
 */
 
+#include <sstream>
 #include "Restaurant.h"
 
 int Restaurant::m_uid = 0;
 
+Restaurant::Restaurant(int id, const std::string& name, bool isOpen, int ownerId) :
+	m_id(id),
+	m_name(name),
+    m_isOpen(isOpen),
+	m_ownerId(ownerId)
+{
+	if (id > m_uid)
+	{
+		m_uid = id;
+	}
+}
+
 int Restaurant::getId() const
 {
 	return m_id;
@@ -52,3 +65,44 @@ void Restaurant::setStatus(bool status)
 {
 	m_isOpen = status;
 }
+
+int Restaurant::getOwnerId() const
+{
+	return m_ownerId;
+}
+
+std::string Restaurant::serialize() const
+{
+    std::ostringstream serializedRestaurant;
+    serializedRestaurant << m_id << '|'
+        << m_name << '|'
+        << (m_isOpen ? '1' : '0') << '|'
+        << m_ownerId;
+    return serializedRestaurant.str();
+}
+
+std::shared_ptr<Restaurant> Restaurant::deserialize(const std::string& record)
+{
+    int id, ownerId;
+    std::string name, token;
+    bool isOpen;
+    std::istringstream serializedRestaurant(record);
+    getline(serializedRestaurant, token, '|');
+    try {
+        id = std::stoi(token);
+    }
+    catch (...) {
+        throw std::runtime_error("Invalid Restaurant ID in snapshot");
+    }
+    getline(serializedRestaurant, name, '|');
+    getline(serializedRestaurant, token, '|');
+    isOpen = (token == "1");
+    getline(serializedRestaurant, token, '|');
+    try {
+        ownerId = std::stoi(token);
+    }
+    catch (...) {
+        throw std::runtime_error("Invalid Owner ID for Restaurant in snapshot");
+    }
+    return std::make_shared<Restaurant>(id, name, isOpen, ownerId);
+}

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Restaurant.h

@@ -22,17 +22,21 @@ private:
 	menuItems m_menuItems;
 	orders m_orders;
 	bool m_isOpen;
+	int m_ownerId;
 public:
 	Restaurant() :
 		m_id(++m_uid),
 		m_name(""),
-		m_isOpen(true)
+		m_isOpen(true),
+		m_ownerId(0)
 	{}
-	Restaurant(const std::string& name) :
+	Restaurant(const std::string& name, int ownerId) :
 		m_id(++m_uid),
 		m_name(name),
-		m_isOpen(true)
+		m_isOpen(true),
+		m_ownerId(ownerId)
 	{}
+	Restaurant(int, const std::string&, bool, int);
 	int getId() const;
 	void addMenuItem(const MenuItem&);
 	menuItems& getMenuItems();
@@ -41,4 +45,7 @@ public:
 	void addOrder(std::shared_ptr<Order>);
 	bool getStatus() const;
 	void setStatus(bool);
+	int getOwnerId() const;
+	std::string serialize() const;
+	static std::shared_ptr<Restaurant> deserialize(const std::string&);
 };

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/RestaurantOwner.h

@@ -25,6 +25,15 @@ public:
         const std::string& email,
         const std::string& address) :
         User(username, name, phone, password, email, address)
+    {}
+    RestaurantOwner(int id,
+        const std::string& username,
+        const std::string& name,
+        const std::string& phone,
+        const std::string& password,
+        const std::string& email,
+        const std::string& address) :
+        User(id, username, name, phone, password, email, address)
     {}
 	void addRestaurant(std::shared_ptr<Restaurant>);
 	restaurants& getRestaurants();

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp.vcxproj

@@ -161,6 +161,14 @@
     <ClInclude Include="RestaurantOwnerMenu.h" />
     <ClInclude Include="User.h" />
   </ItemGroup>
+  <ItemGroup>
+    <Text Include="assignments.txt" />
+    <Text Include="items.txt" />
+    <Text Include="menuItems.txt" />
+    <Text Include="orders.txt" />
+    <Text Include="restaurants.txt" />
+    <Text Include="users.txt" />
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp.vcxproj.filters

@@ -135,4 +135,22 @@
       <Filter>Utility</Filter>
     </ClInclude>
   </ItemGroup>
+  <ItemGroup>
+    <Text Include="users.txt">
+      <Filter>Files</Filter>
+    </Text>
+    <Text Include="restaurants.txt">
+      <Filter>Files</Filter>
+    </Text>
+    <Text Include="menuItems.txt">
+      <Filter>Files</Filter>
+    </Text>
+    <Text Include="orders.txt">
+      <Filter>Files</Filter>
+    </Text>
+    <Text Include="items.txt">
+      <Filter>Files</Filter>
+    </Text>
+    <Text Include="assignments.txt" />
+  </ItemGroup>
 </Project>

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/User.cpp

@@ -3,7 +3,40 @@ Author: Joel Mathew Thomas
 Date: 18-02-2026
 */
 
+#include <sstream>
+#include <stdexcept>
 #include "User.h"
+#include "RestaurantOwner.h"
+#include "Customer.h"
+#include "DeliveryPartner.h"
+
+int User::m_uid = 0;
+
+User::User(int id,
+    const std::string& username,
+    const std::string& name,
+    const std::string& phone,
+    const std::string& password,
+    const std::string& email,
+    const std::string& address) :
+    m_id(id),
+    m_username(username),
+    m_name(name),
+    m_phone(phone),
+    m_password(password),
+    m_email(email),
+    m_address(address)
+{
+    if (id > m_uid)
+    {
+        m_uid = id;
+    }
+}
+
+int User::getId() const
+{
+    return m_id;
+}
 
 std::string User::getUsername() const
 {
@@ -34,3 +67,47 @@ bool User::login(const std::string& password) const
 {
 	return password == m_password;
 }
+
+std::string User::serialize() const
+{
+    std::ostringstream serializedUser;
+    serializedUser << m_id << '|'
+        << m_username << '|'
+        << m_name << '|'
+        << m_phone << '|'
+        << m_password << '|'
+        << m_email << '|'
+        << m_address << '|'
+        << getType();
+    return serializedUser.str();
+}
+
+std::shared_ptr<User> User::deserialize(const std::string& record)
+{
+    int id;
+    std::string username, name, phone, password, email, address, type, token;
+    std::istringstream serializedUser(record);
+    getline(serializedUser, token, '|');
+    try {
+        id = std::stoi(token);
+    }
+    catch (...) {
+        throw std::runtime_error("Invalid User ID in snapshot");
+    }
+    getline(serializedUser, username, '|');
+    getline(serializedUser, name, '|');
+    getline(serializedUser, phone, '|');
+    getline(serializedUser, password, '|');
+    getline(serializedUser, email, '|');
+    getline(serializedUser, address, '|');
+    getline(serializedUser, type, '|');
+    if (type == "RestaurantOwner")
+        return std::make_shared<RestaurantOwner>(id, username, name, phone, password, email, address);
+    else if (type == "Customer")
+        return std::make_shared<Customer>(id, username, name, phone, password, email, address);
+    else if (type == "DeliveryPartner")
+        return std::make_shared<DeliveryPartner>(id, username, name, phone, password, email, address);
+    else {
+        throw std::runtime_error("Cannot deserialize User. Snaphshot is corrupted!");
+    }
+}

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/User.h

@@ -5,10 +5,13 @@ Date: 17-02-2026
 
 #pragma once
 #include <string>
+#include <memory>
 
 class User
 {
 private:
+    static int m_uid;
+    int m_id;
     std::string m_username;
     std::string m_name;
     std::string m_phone;
@@ -16,7 +19,8 @@ private:
     std::string m_email;
     std::string m_address;
 public:
-    User():
+    User() :
+        m_id(0),
         m_username(""),
         m_name(""),
         m_phone(""),
@@ -30,6 +34,7 @@ public:
         const std::string& password,
         const std::string& email,
         const std::string& address):
+        m_id(++m_uid),
         m_username(username),
         m_name(name),
         m_phone(phone),
@@ -37,7 +42,15 @@ public:
         m_email(email),
         m_address(address)
     {}
+    User(int,
+        const std::string&,
+        const std::string&,
+        const std::string&,
+        const std::string&,
+        const std::string&,
+        const std::string&);
     virtual ~User() = default;
+    int getId() const;
     std::string getUsername() const;
     std::string getName() const;
     std::string getPhone() const;
@@ -45,5 +58,7 @@ public:
     std::string getAddress() const;
     virtual std::string getType() const = 0;
     bool login(const std::string&) const;
+    std::string serialize() const;
+    static std::shared_ptr<User> deserialize(const std::string&);
 };
 

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/menuItems.txt

@@ -0,0 +1,150 @@
+1|Grilled Chicken|Classic grilled chicken|12.5|1
+2|Veg Burger|Vegetable patty burger|8|1
+3|Cheese Burger|Beef burger with cheese|10|1
+4|French Fries|Crispy fries|4.5|1
+5|Grilled Sandwich|Toasted sandwich|6|1
+6|Chicken Wrap|Grilled chicken wrap|9|1
+7|Veg Wrap|Vegetable wrap|7.5|1
+8|Cola|Chilled soft drink|2|1
+9|Iced Tea|Cold brewed tea|2.5|1
+10|Brownie|Chocolate brownie|5|1
+11|Pasta Alfredo|Creamy pasta|11|2
+12|Pasta Marinara|Tomato pasta|10|2
+13|Garlic Bread|Toasted garlic bread|4|2
+14|Caesar Salad|Fresh salad|7.5|2
+15|Grilled Veggies|Seasonal vegetables|6.5|2
+16|Chicken Pasta|Pasta with chicken|12.5|2
+17|Soup of the Day|Daily soup|5|2
+18|Coffee|Hot brewed coffee|3|2
+19|Tea|Hot tea|2.5|2
+20|Cheesecake|Classic cheesecake|6|2
+21|Veg Bowl|Healthy veg bowl|9|3
+22|Chicken Bowl|Protein chicken bowl|11.5|3
+23|Quinoa Salad|Quinoa mixed salad|10|3
+24|Fruit Salad|Fresh fruit mix|6|3
+25|Avocado Toast|Toasted avocado bread|7.5|3
+26|Smoothie|Fruit smoothie|5.5|3
+27|Grilled Tofu|Tofu with herbs|9.5|3
+28|Veg Soup|Warm vegetable soup|5|3
+29|Green Juice|Fresh juice|4.5|3
+30|Yogurt Cup|Chilled yogurt|3.5|3
+31|Chicken Wings|Spicy wings|10.5|4
+32|Veg Nuggets|Crispy nuggets|7|4
+33|Loaded Fries|Fries with toppings|8.5|4
+34|Chicken Burger|Burger with chicken|9.5|4
+35|Veg Burger|Classic veg burger|8|4
+36|Onion Rings|Crispy onion rings|5|4
+37|Hot Dog|Grilled hot dog|6.5|4
+38|Milkshake|Vanilla milkshake|4.5|4
+39|Soda|Carbonated drink|2|4
+40|Ice Cream|Vanilla scoop|3.5|4
+41|Breakfast Combo|Eggs and toast|8|5
+42|Pancakes|Fluffy pancakes|6.5|5
+43|Omelette|Cheese omelette|5.5|5
+44|Toast Butter|Buttered toast|3|5
+45|Fruit Plate|Seasonal fruits|4.5|5
+46|Lunch Plate|Daily lunch meal|10|5
+47|Veg Curry|Mixed veg curry|8.5|5
+48|Rice Bowl|Steamed rice|4|5
+49|Tea|Hot tea|2|5
+50|Coffee|Fresh coffee|3|5
+51|Chicken Rice|Rice with chicken|11|6
+52|Veg Rice|Rice with vegetables|9|6
+53|Noodles|Stir fried noodles|8.5|6
+54|Veg Manchurian|Veg balls in sauce|9.5|6
+55|Chicken Manchurian|Chicken in sauce|11.5|6
+56|Spring Rolls|Crispy rolls|6|6
+57|Fried Rice|Classic fried rice|8|6
+58|Hot Soup|Soup bowl|4.5|6
+59|Cold Drink|Chilled beverage|2.5|6
+60|Ice Cream|Chocolate scoop|3.5|6
+61|Chicken Sandwich|Grilled sandwich|8.5|7
+62|Veg Sandwich|Vegetable sandwich|7|7
+63|Club Sandwich|Triple layer sandwich|9.5|7
+64|French Fries|Crispy fries|4|7
+65|Cheese Toast|Toasted cheese|5|7
+66|Soup|Daily soup|4.5|7
+67|Salad|Fresh salad|6|7
+68|Cold Coffee|Iced coffee|3.5|7
+69|Tea|Hot tea|2|7
+70|Brownie|Chocolate brownie|5.5|7
+71|Steak|Grilled steak|15|8
+72|Chicken Steak|Chicken fillet|13|8
+73|Veg Steak|Grilled veg steak|11|8
+74|Mashed Potato|Creamy potato|5.5|8
+75|Grilled Veggies|Mixed vegetables|6.5|8
+76|Soup|Chef special soup|5|8
+77|Garlic Bread|Toasted bread|4.5|8
+78|Soft Drink|Cold beverage|2.5|8
+79|Dessert|Daily dessert|6|8
+80|Ice Cream|Vanilla ice cream|3.5|8
+81|Chicken Pizza|Thin crust pizza|12|9
+82|Veg Pizza|Vegetable pizza|10|9
+83|Cheese Pizza|Cheesy pizza|11|9
+84|Garlic Bread|Garlic breadsticks|4.5|9
+85|Pasta|Italian pasta|9.5|9
+86|Salad|Side salad|5|9
+87|Chicken Wings|Spicy wings|8.5|9
+88|Cola|Cold cola|2|9
+89|Brownie|Chocolate brownie|5.5|9
+90|Ice Cream|Vanilla scoop|3.5|9
+91|Soup Bowl|Warm soup|5|10
+92|Veg Curry|Vegetable curry|8.5|10
+93|Chicken Curry|Spicy chicken curry|10.5|10
+94|Rice|Steamed rice|4|10
+95|Flatbread|Soft flatbread|3|10
+96|Salad|Fresh salad|6|10
+97|Dessert|Sweet dessert|5.5|10
+98|Tea|Hot tea|2|10
+99|Coffee|Fresh coffee|3|10
+100|Ice Cream|Chocolate scoop|3.5|10
+101|Veg Bowl|Healthy veg bowl|9|11
+102|Tofu Stir Fry|Tofu with veggies|10.5|11
+103|Green Salad|Fresh greens|7|11
+104|Veg Soup|Warm soup|5|11
+105|Smoothie|Fruit smoothie|5.5|11
+106|Grilled Veg|Grilled vegetables|8.5|11
+107|Rice Bowl|Steamed rice|4|11
+108|Juice|Fresh juice|4.5|11
+109|Tea|Herbal tea|2.5|11
+110|Fruit Cup|Mixed fruits|3.5|11
+111|BBQ Chicken|Grilled BBQ chicken|13|12
+112|BBQ Veg|Grilled veg platter|11|12
+113|Roasted Potatoes|Herb potatoes|6|12
+114|Grilled Corn|Butter corn|5.5|12
+115|Chicken Skewers|Skewered chicken|12|12
+116|Veg Skewers|Vegetable skewers|9.5|12
+117|Soup|Hot soup|4.5|12
+118|Soft Drink|Cold drink|2.5|12
+119|Dessert|Sweet dish|5.5|12
+120|Ice Cream|Vanilla ice cream|3.5|12
+121|Chicken Burger|Fast chicken burger|9.5|13
+122|Veg Burger|Quick veg burger|8|13
+123|French Fries|Golden fries|4|13
+124|Chicken Nuggets|Crispy nuggets|7|13
+125|Veg Nuggets|Veg nuggets|6.5|13
+126|Wrap|Quick wrap|7.5|13
+127|Soft Drink|Cold beverage|2.5|13
+128|Milkshake|Chocolate shake|4.5|13
+129|Ice Cream|Vanilla scoop|3.5|13
+130|Cookie|Choco cookie|2.5|13
+131|Veg Platter|Mixed veg platter|10|14
+132|Chicken Platter|Chicken platter|12.5|14
+133|Soup|Warm soup|5|14
+134|Salad|Fresh salad|6|14
+135|Rice Bowl|Rice bowl|4.5|14
+136|Flatbread|Soft bread|3|14
+137|Dessert|Sweet dessert|5.5|14
+138|Tea|Hot tea|2|14
+139|Coffee|Fresh coffee|3|14
+140|Ice Cream|Vanilla ice cream|3.5|14
+141|Chicken Wrap|Spicy chicken wrap|9.5|15
+142|Veg Wrap|Veggie wrap|8|15
+143|Rice Bowl|Rice bowl|4.5|15
+144|Noodles|Stir noodles|8.5|15
+145|Soup|Hot soup|5|15
+146|Grilled Chicken|Herb grilled chicken|12|15
+147|Salad|Fresh salad|6|15
+148|Soft Drink|Cold drink|2.5|15
+149|Dessert|Sweet dessert|5.5|15
+150|Ice Cream|Chocolate ice cream|3.5|15

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/restaurants.txt

@@ -0,0 +1,15 @@
+1|Urban Grill|1|1
+2|Corner Bistro|1|1
+3|Fresh Plate|1|1
+4|The Food Spot|0|1
+5|Daily Dine|1|1
+6|Metro Kitchen|1|2
+7|Central Eats|1|2
+8|Prime Bites|1|2
+9|Kitchen Square|0|2
+10|Table & Spoon|1|2
+11|Green Fork|1|3
+12|Open Flame|1|3
+13|Quick Serve|1|3
+14|Urban Table|0|3
+15|Flavor Hub|1|3

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/users.txt

@@ -0,0 +1,9 @@
+1|alex|Alex Miller|100000001|alex|alex@mail.com|CityOne|RestaurantOwner
+2|jordan|Jordan Smith|100000002|jordan|jordan@mail.com|CityTwo|RestaurantOwner
+3|taylor|Taylor Brown|100000003|taylor|taylor@mail.com|CityThree|RestaurantOwner
+4|emma|Emma Wilson|100000004|emma|emma@mail.com|CityOne|Customer
+5|liam|Liam Johnson|100000005|liam|liam@mail.com|CityTwo|Customer
+6|olivia|Olivia Davis|100000006|olivia|olivia@mail.com|CityThree|Customer
+7|noah|Noah Anderson|100000007|noah|noah@mail.com|CityOne|DeliveryPartner
+8|ava|Ava Martinez|100000008|ava|ava@mail.com|CityTwo|DeliveryPartner
+9|ethan|Ethan Thomas|100000009|ethan|ethan@mail.com|CityThree|DeliveryPartner