Rename Utility Helpers

- Modularize loadStates()
- Modularize persistStates()
- Do not convert size_t to int in isEmailValid()
- Make non state mutating functions const
- Make isPhoneNumberValid and isEmailValid static

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Customer.cpp

@@ -1,5 +1,7 @@
 #include "Customer.h"
 
+const std::string Customer::TYPE = "Customer";
+
 void Customer::addOrder(std::shared_ptr<Order> orderPointer)
 {
 	m_orders[orderPointer->getId()] = orderPointer;
@@ -12,5 +14,5 @@ orders& Customer::getOrders()
 
 std::string Customer::getType() const
 {
-	return "Customer";
+	return TYPE;
 }

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Customer.h

@@ -17,6 +17,7 @@ class Customer : public User
 private:
 	orders m_orders;
 public:
+    static const std::string TYPE;
     Customer(const std::string& username,
         const std::string& name,
         const std::string& phone,

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/DeliveryPartner.cpp

@@ -5,6 +5,8 @@ Date: 18-02-2026
 
 #include "DeliveryPartner.h"
 
+const std::string DeliveryPartner::TYPE = "DeliveryPartner";
+
 void DeliveryPartner::acceptDeliveryAssignment(std::shared_ptr<DeliveryAssignment> deliveryAssignmentPointer)
 {
 	m_deliveryAssignments[deliveryAssignmentPointer->getId()] = deliveryAssignmentPointer;
@@ -17,5 +19,5 @@ deliveryAssignments& DeliveryPartner::getAssignedDeliveries()
 
 std::string DeliveryPartner::getType() const
 {
-	return "DeliveryPartner";
+	return TYPE;
 }

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/DeliveryPartner.h

@@ -17,6 +17,7 @@ class DeliveryPartner : public User
 private:
 	deliveryAssignments m_deliveryAssignments;
 public:
+    static const std::string TYPE;
     DeliveryPartner(const std::string& username,
         const std::string& name,
         const std::string& phone,

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/FileDatabase.h

@@ -10,6 +10,7 @@ Date: 22-12-2026
 #include<fstream>
 #include<string>
 #include<stdexcept>
+
 template <typename T> using objects = std::map<int, std::shared_ptr<T>>;
 
 template <typename T>

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/FoodDeliveryController.cpp

@@ -18,10 +18,18 @@ Date: 19-02-2026
 #include "MenuItem.h"
 #include "Order.h"
 #include "DeliveryAssignment.h"
-#include "inputHelper.h"
+#include "InputHelper.h"
-#include "outputHelper.h"
+#include "OutputHelper.h"
+#include "Validator.h"
 #include "FileDatabase.h"
 
+const std::string USERS_FILE = "User.txt";
+const std::string RESTAURANTS_FILE = "Restaurant.txt";
+const std::string MENU_ITEMS_FILE = "MenuItem.txt";
+const std::string ORDERS_FILE = "Order.txt";
+const std::string ITEMS_FILE = "Item.txt";
+const std::string DELIVERY_ASSIGNMENTS_FILE = "DeliveryAssignment.txt";
+
 static bool checkAccess(std::shared_ptr<User> user, const std::string& userWithAccess)
 {
 	if (!user || user->getType() != userWithAccess)
@@ -32,7 +40,7 @@ static bool checkAccess(std::shared_ptr<User> user, const std::string& userWithA
 	return true;
 }
 
-static restaurants::iterator pickRestaurantFromRestaurants(restaurants& ownerRestaurants)
+static restaurants::iterator selectRestaurantFromList(restaurants& ownerRestaurants)
 {
 	util::clear();
 	int restaurantIndex = 1, restaurantChoiceIndex;
@@ -69,7 +77,7 @@ static restaurants::iterator pickRestaurantFromRestaurants(restaurants& ownerRes
 	return restaurantIterator;
 }
 
-static menuItems::iterator pickItemFromMenu(menuItems& restaurantMenuItems)
+static menuItems::iterator selectMenuItemFromList(menuItems& restaurantMenuItems)
 {
 	util::clear();
 	int menuItemIndex = 1, menuItemChoiceIndex;
@@ -85,27 +93,30 @@ static menuItems::iterator pickItemFromMenu(menuItems& restaurantMenuItems)
 		<< std::left << std::setw(50) << "Description"
 		<< std::left << std::setw(5) << "Price"
 		<< "\n";
-	for (menuItems::iterator menuItemIterator = restaurantMenuItems.begin(); menuItemIterator != restaurantMenuItems.end(); menuItemIterator++, menuItemIndex++)
+	std::map<int, menuItems::iterator> availableItems;
+	for (menuItems::iterator menuItemIterator = restaurantMenuItems.begin(); menuItemIterator != restaurantMenuItems.end(); menuItemIterator++)
 	{
 		auto& menuItem = *(menuItemIterator->second);
-		std::cout
+		if (menuItem.isAvailable())
-			<< std::left << std::setw(8) << menuItemIndex
+		{
-			<< std::left << std::setw(5) << menuItem.getId()
+			availableItems[menuItemIndex] = menuItemIterator;
-			<< std::left << std::setw(25) << menuItem.getName()
+			std::cout
-			<< std::left << std::setw(50) << menuItem.getDescription()
+				<< std::left << std::setw(8) << menuItemIndex
-			<< std::left << std::setw(5) << menuItem.getPrice()
+				<< std::left << std::setw(5) << menuItem.getId()
-			<< "\n";
+				<< std::left << std::setw(25) << menuItem.getName()
+				<< std::left << std::setw(50) << menuItem.getDescription()
+				<< std::left << std::setw(5) << menuItem.getPrice()
+				<< "\n";
+			menuItemIndex++;
+		}
 	}
 	std::cout << "\nSelect Index: ";
 	util::readValue<int>(menuItemChoiceIndex);
-	menuItemChoiceIndex--;
+	if (menuItemChoiceIndex < 1 || menuItemChoiceIndex > availableItems.size())
-	if (menuItemChoiceIndex < 0 || menuItemChoiceIndex >= restaurantMenuItems.size())
 	{
 		return restaurantMenuItems.end();
 	}
-	menuItems::iterator menuItemIterator = restaurantMenuItems.begin();
+	return availableItems[menuItemChoiceIndex];
-	std::advance(menuItemIterator, menuItemChoiceIndex);
-	return menuItemIterator;
 }
 
 static std::string getOrderStatusString(const OrderStatus& orderStatus)
@@ -127,7 +138,7 @@ static std::string getOrderStatusString(const OrderStatus& orderStatus)
 	}
 }
 
-static orders::iterator pickOrderFromOrders(orders& userOrders)
+static orders::iterator selectOrderFromList(orders& userOrders)
 {
 	util::clear();
 	std::cout << "Pick an Order\n";
@@ -180,7 +191,7 @@ static std::string getDeliveryStatusString(const DeliveryStatus& deliveryStatus)
 	}
 }
 
-static deliveryAssignments::iterator pickAssignmentFromDeliveryAssignments(deliveryAssignments& assignments, const users& allUsers)
+static deliveryAssignments::iterator selectDeliveryAssignmentFromList(deliveryAssignments& assignments, const users& allUsers)
 {
 	util::clear();
 	std::cout << "Pick a Delivery Assignment\n";
@@ -224,17 +235,16 @@ static deliveryAssignments::iterator pickAssignmentFromDeliveryAssignments(deliv
 	return assignmentIterator;
 }
 
-void FoodDeliveryController::loadStates()
+void FoodDeliveryController::loadUsers()
 {
-	FileDatabase<User> userDatabase("users.txt");
+	FileDatabase<User> userDatabase(USERS_FILE);
-	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();
+}
+
+void FoodDeliveryController::loadRestaurants(objects<MenuItem>& menuItems)
+{
+	FileDatabase<Restaurant> restaurantDatabase(RESTAURANTS_FILE);
+	FileDatabase<MenuItem> menuItemDatabase(MENU_ITEMS_FILE);
 	m_restaurants = restaurantDatabase.load();
 	for (const auto& restaurantPair : m_restaurants)
 	{
@@ -263,6 +273,13 @@ void FoodDeliveryController::loadStates()
 			throw std::runtime_error("MenuItem has invalid Restaurant ID");
 		}
 	}
+}
+
+void FoodDeliveryController::loadOrders(objects<MenuItem>& menuItems)
+{
+	FileDatabase<Order> orderDatabase(ORDERS_FILE);
+	FileDatabase<Item> itemDatabase(ITEMS_FILE);
+	objects<Item> items = itemDatabase.load();
 	m_orders = orderDatabase.load();
 	for (auto& orderPair : m_orders)
 	{
@@ -286,7 +303,6 @@ void FoodDeliveryController::loadStates()
 		}
 		restaurantIterator->second->addOrder(orderPair.second);
 	}
-	items = itemDatabase.load();
 	for (auto& itemPair : items)
 	{
 		int itemId = itemPair.second->getMenuItemId();
@@ -310,6 +326,11 @@ void FoodDeliveryController::loadStates()
 			throw std::runtime_error("Item has invalid Order ID");
 		}
 	}
+}
+
+void FoodDeliveryController::loadDeliveryAssignments()
+{
+	FileDatabase<DeliveryAssignment> deliveryAssignmentsDatabase(DELIVERY_ASSIGNMENTS_FILE);
 	m_assignments = deliveryAssignmentsDatabase.load();
 	for (auto& assignmentPair : m_assignments)
 	{
@@ -341,18 +362,27 @@ void FoodDeliveryController::loadStates()
 	}
 }
 
-void FoodDeliveryController::persistStates()
+void FoodDeliveryController::loadStates()
 {
-	FileDatabase<User> userDatabase("users.txt");
+	loadUsers();
-	FileDatabase<Restaurant> restaurantDatabase("restaurants.txt");
+	objects<MenuItem> menuItems;
-	FileDatabase<MenuItem> menuItemDatabase("menuItems.txt");
+	loadRestaurants(menuItems);
-	FileDatabase<Order> orderDatabase("orders.txt");
+	loadOrders(menuItems);
-	FileDatabase<Item> itemDatabase("items.txt");
+	loadDeliveryAssignments();
-	FileDatabase<DeliveryAssignment> deliveryAssignmentsDatabase("assignments.txt");
+}
+
+void FoodDeliveryController::persistUsers() const
+{
+	FileDatabase<User> userDatabase(USERS_FILE);
 	userDatabase.save(m_users);
-	restaurantDatabase.save(m_restaurants);
+}
+
+void FoodDeliveryController::persistRestaurants() const
+{
+	FileDatabase<Restaurant> restaurantDatabase(RESTAURANTS_FILE);
+	FileDatabase<MenuItem> menuItemDatabase(MENU_ITEMS_FILE);
 	objects<MenuItem> allMenuItems;
-	objects<Item> allItems;
+	restaurantDatabase.save(m_restaurants);
 	for (const auto& restaurantPair : m_restaurants)
 	{
 		for (const auto& menuItemPair : restaurantPair.second->getMenuItems())
@@ -361,6 +391,13 @@ void FoodDeliveryController::persistStates()
 		}
 	}
 	menuItemDatabase.save(allMenuItems);
+}
+
+void FoodDeliveryController::persistOrders() const
+{
+	FileDatabase<Order> orderDatabase(ORDERS_FILE);
+	FileDatabase<Item> itemDatabase(ITEMS_FILE);
+	objects<Item> allItems;
 	orderDatabase.save(m_orders);
 	for (const auto& orderPair : m_orders)
 	{
@@ -370,9 +407,22 @@ void FoodDeliveryController::persistStates()
 		}
 	}
 	itemDatabase.save(allItems);
+}
+
+void FoodDeliveryController::persistDeliveryAssignments() const
+{
+	FileDatabase<DeliveryAssignment> deliveryAssignmentsDatabase(DELIVERY_ASSIGNMENTS_FILE);
 	deliveryAssignmentsDatabase.save(m_assignments);
 }
 
+void FoodDeliveryController::persistStates() const
+{
+	persistUsers();
+	persistRestaurants();
+	persistOrders();
+	persistDeliveryAssignments();
+}
+
 void FoodDeliveryController::run()
 {
 	bool isMenuActive = true;
@@ -438,15 +488,15 @@ void FoodDeliveryController::login()
 		std::unique_ptr<Menu> menu;
 		if (user.login(password))
 		{
-			if (user.getType() == "RestaurantOwner")
+			if (user.getType() == RestaurantOwner::TYPE)
 			{
 				menu = std::make_unique<RestaurantOwnerMenu>(*this, user.getName());
 			}
-			else if (user.getType() == "Customer")
+			else if (user.getType() == Customer::TYPE)
 			{
 				menu = std::make_unique<CustomerMenu>(*this, user.getName());
 			}
-			else if (user.getType() == "DeliveryPartner")
+			else if (user.getType() == DeliveryPartner::TYPE)
 			{
 				menu = std::make_unique<DeliveryPartnerMenu>(*this, user.getName());
 			}
@@ -496,8 +546,18 @@ void FoodDeliveryController::registerUser()
 		util::readString(name);
 		std::cout << "Enter Phone: ";
 		util::readString(phone);
+		if (!util::isPhoneNumberValid(phone))
+		{
+			std::cout << "Phone Number is Invalid. Cannot Register User!\n";
+			return;
+		}
 		std::cout << "Enter Email: ";
 		util::readString(email);
+		if (!util::isEmailValid(email))
+		{
+			std::cout << "Email ID is Invalid. Cannot Register User!\n";
+			return;
+		}
 		std::cout << "Enter Address: ";
 		util::readString(address);
 		while (true)
@@ -547,7 +607,7 @@ void FoodDeliveryController::registerUser()
 void FoodDeliveryController::listRestaurants() const
 {
 	util::clear();
-	if (!checkAccess(m_authenticatedUser, "RestaurantOwner"))
+	if (!checkAccess(m_authenticatedUser, RestaurantOwner::TYPE))
 	{
 		return;
 	}
@@ -577,7 +637,7 @@ void FoodDeliveryController::addNewRestaurant()
 {
 	std::string name;
 	util::clear();
-	if (!checkAccess(m_authenticatedUser, "RestaurantOwner"))
+	if (!checkAccess(m_authenticatedUser, RestaurantOwner::TYPE))
 	{
 		return;
 	}
@@ -595,12 +655,12 @@ void FoodDeliveryController::updateRestaurantStatus() const
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "RestaurantOwner"))
+		if (!checkAccess(m_authenticatedUser, RestaurantOwner::TYPE))
 		{
 			return;
 		}
 		RestaurantOwner& restaurantOwner = *(std::dynamic_pointer_cast<RestaurantOwner>(m_authenticatedUser));
-		restaurants::iterator restaurantIterator = pickRestaurantFromRestaurants(restaurantOwner.getRestaurants());
+		restaurants::iterator restaurantIterator = selectRestaurantFromList(restaurantOwner.getRestaurants());
 		if (restaurantIterator != restaurantOwner.getRestaurants().end())
 		{
 			if (restaurantIterator->second->getStatus() == true)
@@ -631,12 +691,12 @@ void FoodDeliveryController::listRestaurantOrders() const
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "RestaurantOwner"))
+		if (!checkAccess(m_authenticatedUser, RestaurantOwner::TYPE))
 		{
 			return;
 		}
 		RestaurantOwner& restaurantOwner = *(std::dynamic_pointer_cast<RestaurantOwner>(m_authenticatedUser));
-		restaurants::iterator restaurantIterator = pickRestaurantFromRestaurants(restaurantOwner.getRestaurants());
+		restaurants::iterator restaurantIterator = selectRestaurantFromList(restaurantOwner.getRestaurants());
 		if (restaurantIterator != restaurantOwner.getRestaurants().end())
 		{
 			orders& restaurantOrders = restaurantIterator->second->getOrders();
@@ -645,7 +705,7 @@ void FoodDeliveryController::listRestaurantOrders() const
 				std::cout << "Restaurant " << restaurantIterator->second->getName() << " has no orders!\n";
 				return;
 			}
-			orders::iterator orderIterator = pickOrderFromOrders(restaurantOrders);
+			orders::iterator orderIterator = selectOrderFromList(restaurantOrders);
 			if (orderIterator != restaurantOrders.end())
 			{
 				util::clear();
@@ -689,17 +749,17 @@ void FoodDeliveryController::listRestaurantOrders() const
 	}
 }
 
-void FoodDeliveryController::markOrderReady()
+void FoodDeliveryController::setOrderReady()
 {
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "RestaurantOwner"))
+		if (!checkAccess(m_authenticatedUser, RestaurantOwner::TYPE))
 		{
 			return;
 		}
 		RestaurantOwner& restaurantOwner = *(std::dynamic_pointer_cast<RestaurantOwner>(m_authenticatedUser));
-		restaurants::iterator restaurantIterator = pickRestaurantFromRestaurants(restaurantOwner.getRestaurants());
+		restaurants::iterator restaurantIterator = selectRestaurantFromList(restaurantOwner.getRestaurants());
 		if (restaurantIterator != restaurantOwner.getRestaurants().end())
 		{
 			orders& restaurantOrders = restaurantIterator->second->getOrders();
@@ -708,7 +768,7 @@ void FoodDeliveryController::markOrderReady()
 				std::cout << "Restaurant " << restaurantIterator->second->getName() << " has no orders!\n";
 				return;
 			}
-			orders::iterator orderIterator = pickOrderFromOrders(restaurantOrders);
+			orders::iterator orderIterator = selectOrderFromList(restaurantOrders);
 			if (orderIterator != restaurantOrders.end())
 			{
 				OrderStatus orderStatus = orderIterator->second->getStatus();
@@ -747,12 +807,12 @@ void FoodDeliveryController::listMenuItems() const
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "RestaurantOwner"))
+		if (!checkAccess(m_authenticatedUser, RestaurantOwner::TYPE))
 		{
 			return;
 		}
 		RestaurantOwner& restaurantOwner = *(std::dynamic_pointer_cast<RestaurantOwner>(m_authenticatedUser));
-		restaurants::iterator restaurantIterator = pickRestaurantFromRestaurants(restaurantOwner.getRestaurants());
+		restaurants::iterator restaurantIterator = selectRestaurantFromList(restaurantOwner.getRestaurants());
 		if (restaurantIterator != restaurantOwner.getRestaurants().end())
 		{
 			util::clear();
@@ -766,14 +826,16 @@ void FoodDeliveryController::listMenuItems() const
 			std::cout << std::left << std::setw(5) << "ID"
 				<< std::left << std::setw(25) << "Name"
 				<< std::left << std::setw(50) << "Description"
-				<< std::left << std::setw(5) << "Price"
+				<< std::left << std::setw(10) << "Price"
+				<< std::left << std::setw(20) << "Status"
 				<< "\n";
 			for (auto& menuItemPointer : restaurantMenuItems)
 			{
 				std::cout << std::left << std::setw(5) << menuItemPointer.second->getId()
 					<< std::left << std::setw(25) << menuItemPointer.second->getName()
 					<< std::left << std::setw(50) << menuItemPointer.second->getDescription()
-					<< std::left << std::setw(5) << menuItemPointer.second->getPrice()
+					<< std::left << std::setw(10) << menuItemPointer.second->getPrice()
+					<< std::left << std::setw(10) << (menuItemPointer.second->isAvailable() ? "Available" : "Not Available")
 					<< "\n";
 			}
 		}
@@ -794,12 +856,12 @@ void FoodDeliveryController::addMenuItem() const
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "RestaurantOwner"))
+		if (!checkAccess(m_authenticatedUser, RestaurantOwner::TYPE))
 		{
 			return;
 		}
 		RestaurantOwner& restaurantOwner = *(std::dynamic_pointer_cast<RestaurantOwner>(m_authenticatedUser));
-		restaurants::iterator restaurantIterator = pickRestaurantFromRestaurants(restaurantOwner.getRestaurants());
+		restaurants::iterator restaurantIterator = selectRestaurantFromList(restaurantOwner.getRestaurants());
 		if (restaurantIterator != restaurantOwner.getRestaurants().end())
 		{
 			util::clear();
@@ -832,19 +894,19 @@ void FoodDeliveryController::removeMenuItem() const
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "RestaurantOwner"))
+		if (!checkAccess(m_authenticatedUser, RestaurantOwner::TYPE))
 		{
 			return;
 		}
 		RestaurantOwner& restaurantOwner = *(std::dynamic_pointer_cast<RestaurantOwner>(m_authenticatedUser));
-		restaurants::iterator restaurantIterator = pickRestaurantFromRestaurants(restaurantOwner.getRestaurants());
+		restaurants::iterator restaurantIterator = selectRestaurantFromList(restaurantOwner.getRestaurants());
 		if (restaurantIterator != restaurantOwner.getRestaurants().end())
 		{
 			menuItems& restaurantMenuItems = restaurantIterator->second->getMenuItems();
-			menuItems::iterator menuItemIterator = pickItemFromMenu(restaurantMenuItems);
+			menuItems::iterator menuItemIterator = selectMenuItemFromList(restaurantMenuItems);
 			if (menuItemIterator != restaurantMenuItems.end())
 			{
-				restaurantMenuItems.erase(menuItemIterator);
+				menuItemIterator->second->makeUnavailable();
 				std::cout << "Removed Menu Item successfully\n";
 			}
 			else if (!restaurantMenuItems.empty())
@@ -869,7 +931,7 @@ void FoodDeliveryController::listCustomerOrders() const
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "Customer"))
+		if (!checkAccess(m_authenticatedUser, Customer::TYPE))
 		{
 			return;
 		}
@@ -884,7 +946,7 @@ void FoodDeliveryController::listCustomerOrders() const
 			std::cout << "You have not placed any orders!\n";
 			return;
 		}
-		orders::iterator orderIterator = pickOrderFromOrders(customerOrders);
+		orders::iterator orderIterator = selectOrderFromList(customerOrders);
 		if (orderIterator != customerOrders.end())
 		{
 			util::clear();
@@ -928,7 +990,7 @@ void FoodDeliveryController::placeOrder()
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "Customer"))
+		if (!checkAccess(m_authenticatedUser, Customer::TYPE))
 		{
 			return;
 		}
@@ -937,7 +999,7 @@ void FoodDeliveryController::placeOrder()
 		{
 			throw std::runtime_error("Cannot place order. Failed to verify access!");
 		}
-		restaurants::iterator restaurantIterator = pickRestaurantFromRestaurants(m_restaurants);
+		restaurants::iterator restaurantIterator = selectRestaurantFromList(m_restaurants);
 		if (restaurantIterator != m_restaurants.end())
 		{
 			bool isMenuActive = true;
@@ -956,7 +1018,7 @@ void FoodDeliveryController::placeOrder()
 			std::shared_ptr<Order> order;
 			while (isMenuActive)
 			{
-				menuItems::iterator menuItemIterator = pickItemFromMenu(restaurantMenuItems);
+				menuItems::iterator menuItemIterator = selectMenuItemFromList(restaurantMenuItems);
 				if (menuItemIterator != restaurantMenuItems.end())
 				{
 					int quantity;
@@ -1018,7 +1080,7 @@ void FoodDeliveryController::cancelOrder() const
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "Customer"))
+		if (!checkAccess(m_authenticatedUser, Customer::TYPE))
 		{
 			return;
 		}
@@ -1033,7 +1095,7 @@ void FoodDeliveryController::cancelOrder() const
 			std::cout << "You have not placed any orders!\n";
 			return;
 		}
-		orders::iterator orderIterator = pickOrderFromOrders(customerOrders);
+		orders::iterator orderIterator = selectOrderFromList(customerOrders);
 		if (orderIterator != customerOrders.end())
 		{
 			OrderStatus orderStatus = orderIterator->second->getStatus();
@@ -1064,7 +1126,7 @@ void FoodDeliveryController::listDeliveryAssignments()
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "DeliveryPartner"))
+		if (!checkAccess(m_authenticatedUser, DeliveryPartner::TYPE))
 		{
 			return;
 		}
@@ -1110,7 +1172,7 @@ void FoodDeliveryController::acceptDeliveryAssignment()
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "DeliveryPartner"))
+		if (!checkAccess(m_authenticatedUser, DeliveryPartner::TYPE))
 		{
 			return;
 		}
@@ -1124,7 +1186,7 @@ void FoodDeliveryController::acceptDeliveryAssignment()
 			std::cout << "No Delivery Assignments available at the moment!\n";
 			return;
 		}
-		deliveryAssignments::iterator assignmentIterator = pickAssignmentFromDeliveryAssignments(m_assignments, m_users);
+		deliveryAssignments::iterator assignmentIterator = selectDeliveryAssignmentFromList(m_assignments, m_users);
 		if (assignmentIterator != m_assignments.end())
 		{
 			DeliveryStatus deliveryStatus = assignmentIterator->second->getStatus();
@@ -1157,7 +1219,7 @@ void FoodDeliveryController::confirmDeliveryAssignment() const
 	try
 	{
 		util::clear();
-		if (!checkAccess(m_authenticatedUser, "DeliveryPartner"))
+		if (!checkAccess(m_authenticatedUser, DeliveryPartner::TYPE))
 		{
 			return;
 		}
@@ -1172,7 +1234,7 @@ void FoodDeliveryController::confirmDeliveryAssignment() const
 			std::cout << "You haven't accepted any Delivery Assignments!\n";
 			return;
 		}
-		deliveryAssignments::iterator assignmentIterator = pickAssignmentFromDeliveryAssignments(assignments, m_users);
+		deliveryAssignments::iterator assignmentIterator = selectDeliveryAssignmentFromList(assignments, m_users);
 		if (assignmentIterator != assignments.end())
 		{
 			DeliveryStatus deliveryStatus = assignmentIterator->second->getStatus();

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/FoodDeliveryController.h

@@ -22,6 +22,7 @@ using menuItems = std::map<int, std::shared_ptr<MenuItem>>;
 using items = std::vector<std::shared_ptr<Item>>;
 using orders = std::map<int, std::shared_ptr<Order>>;
 using deliveryAssignments = std::map<int, std::shared_ptr<DeliveryAssignment>>;
+template <typename T> using objects = std::map<int, std::shared_ptr<T>>;
 
 class FoodDeliveryController
 {
@@ -31,8 +32,16 @@ private:
 	orders m_orders;
 	deliveryAssignments m_assignments;
 	std::shared_ptr<User> m_authenticatedUser;
+	void loadUsers();
+	void loadRestaurants(objects<MenuItem>&);
+	void loadOrders(objects<MenuItem>&);
+	void loadDeliveryAssignments();
+	void persistUsers() const;
+	void persistRestaurants() const;
+	void persistOrders() const;
+	void persistDeliveryAssignments() const;
 	void loadStates();
-	void persistStates();
+	void persistStates() const;
 public:
 	void run();
 	void login();
@@ -41,7 +50,7 @@ public:
 	void addNewRestaurant();
 	void updateRestaurantStatus() const;
 	void listRestaurantOrders() const;
-	void markOrderReady();
+	void setOrderReady();
 	void listMenuItems() const;
 	void addMenuItem() const;
 	void removeMenuItem() const;

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/MenuItem.cpp

@@ -10,11 +10,12 @@ Date: 18-02-2026
 int MenuItem::m_uid = 0;
 
 
-MenuItem::MenuItem(int id, const std::string& name, const std::string& description, double price, int restaurantId):
+MenuItem::MenuItem(int id, const std::string& name, const std::string& description, double price, bool isAvailable, int restaurantId):
 	m_id(id),
 	m_name(name),
 	m_description(description),
 	m_price(price),
+    m_isAvailable(isAvailable),
 	m_restaurantId(restaurantId)
 {
 	if (id > m_uid)
@@ -58,6 +59,16 @@ int MenuItem::getRestaurantId() const
 	return m_restaurantId;
 }
 
+bool MenuItem::isAvailable() const
+{
+    return m_isAvailable;
+}
+
+void MenuItem::makeUnavailable()
+{
+    m_isAvailable = false;
+}
+
 std::string MenuItem::serialize() const
 {
     std::ostringstream serializedMenuItem;
@@ -65,6 +76,7 @@ std::string MenuItem::serialize() const
         << m_name << '|'
         << m_description << '|'
         << m_price << '|'
+        << (m_isAvailable ? '1' : '0') << '|'
         << m_restaurantId;
     return serializedMenuItem.str();
 }
@@ -73,6 +85,7 @@ std::shared_ptr<MenuItem> MenuItem::deserialize(const std::string& record)
 {
     int id, restaurantId;
     double price;
+    bool isAvailable;
     std::string name, description, token;
     std::istringstream serializedMenuItem(record);
     getline(serializedMenuItem, token, '|');
@@ -92,11 +105,13 @@ std::shared_ptr<MenuItem> MenuItem::deserialize(const std::string& record)
         throw std::runtime_error("Invalid Price for MenuItem in snapshot");
     }
     getline(serializedMenuItem, token, '|');
+    isAvailable = ((token == "1") ? true : false);
+    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);
+    return std::make_shared<MenuItem>(id, name, description, price, isAvailable, restaurantId);
 }

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/MenuItem.h

@@ -15,6 +15,7 @@ private:
 	std::string m_name;
 	std::string m_description;
 	double m_price;
+	bool m_isAvailable;
 	int m_restaurantId;
 public:
 	MenuItem():
@@ -22,6 +23,7 @@ public:
 		m_name(""),
 		m_description(""),
 		m_price(0),
+		m_isAvailable(true),
 		m_restaurantId(0)
 	{}
 	MenuItem(const std::string& name, const std::string& description, double price, int restaurantId):
@@ -29,15 +31,18 @@ public:
 		m_name(name),
 		m_description(description),
 		m_price(price),
+		m_isAvailable(true),
 		m_restaurantId(restaurantId)
 	{}
-	MenuItem(int, const std::string&, const std::string&, double, int);
+	MenuItem(int, const std::string&, const std::string&, double, bool, int);
 	int getId() const;
 	std::string getName() const;
 	std::string getDescription() const;
 	double getPrice() const;
 	void setPrice(double);
 	int getRestaurantId() const;
+	bool isAvailable() const;
+	void makeUnavailable();
 	std::string serialize() const;
 	static std::shared_ptr<MenuItem> deserialize(const std::string&);
 };

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/MenuItem.txt

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

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/RestaurantOwner.cpp

@@ -5,6 +5,8 @@ Date: 18-02-2026
 
 #include "RestaurantOwner.h"
 
+const std::string RestaurantOwner::TYPE = "RestaurantOwner";
+
 void RestaurantOwner::addRestaurant(std::shared_ptr<Restaurant> restaurantPointer)
 {
 	m_restaurants[restaurantPointer->getId()] = restaurantPointer;
@@ -17,5 +19,5 @@ restaurants& RestaurantOwner::getRestaurants()
 
 std::string RestaurantOwner::getType() const
 {
-	return "RestaurantOwner";
+	return TYPE;
 }

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/RestaurantOwner.h

@@ -16,8 +16,9 @@ using restaurants = std::map<int, std::shared_ptr<Restaurant>>;
 class RestaurantOwner : public User
 {
 private:
-	restaurants m_restaurants;
+    restaurants m_restaurants;
 public:
+    static const std::string TYPE;
     RestaurantOwner(const std::string& username,
         const std::string& name,
         const std::string& phone,

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/RestaurantOwnerMenu.cpp

@@ -64,7 +64,7 @@ bool RestaurantOwnerMenu::handleOperation(int choice)
 		m_foodDeliveryController.listRestaurantOrders();
 		break;
 	case 5:
-		m_foodDeliveryController.markOrderReady();
+		m_foodDeliveryController.setOrderReady();
 		break;
 	case 6:
 		m_foodDeliveryController.listMenuItems();

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

@@ -130,17 +130,18 @@
     <ClCompile Include="DeliveryPartnerMenu.cpp" />
     <ClCompile Include="FileDatabase.cpp" />
     <ClCompile Include="FoodDeliveryController.cpp" />
-    <ClCompile Include="inputHelper.cpp" />
+    <ClCompile Include="InputHelper.cpp" />
     <ClCompile Include="Item.cpp" />
     <ClCompile Include="Menu.cpp" />
     <ClCompile Include="MenuItem.cpp" />
     <ClCompile Include="Order.cpp" />
-    <ClCompile Include="outputHelper.cpp" />
+    <ClCompile Include="OutputHelper.cpp" />
     <ClCompile Include="Restaurant.cpp" />
     <ClCompile Include="RestaurantOwner.cpp" />
     <ClCompile Include="RestaurantOwnerMenu.cpp" />
     <ClCompile Include="Trenser.FoodDeliveryApp.cpp" />
     <ClCompile Include="User.cpp" />
+    <ClCompile Include="Validator.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Customer.h" />
@@ -150,24 +151,25 @@
     <ClInclude Include="DeliveryPartnerMenu.h" />
     <ClInclude Include="FileDatabase.h" />
     <ClInclude Include="FoodDeliveryController.h" />
-    <ClInclude Include="inputHelper.h" />
+    <ClInclude Include="InputHelper.h" />
     <ClInclude Include="Item.h" />
     <ClInclude Include="Menu.h" />
     <ClInclude Include="MenuItem.h" />
     <ClInclude Include="Order.h" />
-    <ClInclude Include="outputHelper.h" />
+    <ClInclude Include="OutputHelper.h" />
     <ClInclude Include="Restaurant.h" />
     <ClInclude Include="RestaurantOwner.h" />
     <ClInclude Include="RestaurantOwnerMenu.h" />
     <ClInclude Include="User.h" />
+    <ClInclude Include="Validator.h" />
   </ItemGroup>
   <ItemGroup>
-    <Text Include="assignments.txt" />
+    <Text Include="DeliveryAssignment.txt" />
-    <Text Include="items.txt" />
+    <Text Include="Item.txt" />
-    <Text Include="menuItems.txt" />
+    <Text Include="MenuItem.txt" />
-    <Text Include="orders.txt" />
+    <Text Include="Order.txt" />
-    <Text Include="restaurants.txt" />
+    <Text Include="Restaurant.txt" />
-    <Text Include="users.txt" />
+    <Text Include="User.txt" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

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

@@ -75,10 +75,13 @@
     <ClCompile Include="CustomerMenu.cpp">
       <Filter>Controller</Filter>
     </ClCompile>
-    <ClCompile Include="inputHelper.cpp">
+    <ClCompile Include="InputHelper.cpp">
       <Filter>Utility</Filter>
     </ClCompile>
-    <ClCompile Include="outputHelper.cpp">
+    <ClCompile Include="OutputHelper.cpp">
+      <Filter>Utility</Filter>
+    </ClCompile>
+    <ClCompile Include="Validator.cpp">
       <Filter>Utility</Filter>
     </ClCompile>
   </ItemGroup>
@@ -128,29 +131,34 @@
     <ClInclude Include="CustomerMenu.h">
       <Filter>Controller</Filter>
     </ClInclude>
-    <ClInclude Include="inputHelper.h">
+    <ClInclude Include="InputHelper.h">
       <Filter>Utility</Filter>
     </ClInclude>
-    <ClInclude Include="outputHelper.h">
+    <ClInclude Include="OutputHelper.h">
+      <Filter>Utility</Filter>
+    </ClInclude>
+    <ClInclude Include="Validator.h">
       <Filter>Utility</Filter>
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
-    <Text Include="users.txt">
+    <Text Include="DeliveryAssignment.txt">
       <Filter>Files</Filter>
     </Text>
-    <Text Include="restaurants.txt">
+    <Text Include="Item.txt">
       <Filter>Files</Filter>
     </Text>
-    <Text Include="menuItems.txt">
+    <Text Include="MenuItem.txt">
       <Filter>Files</Filter>
     </Text>
-    <Text Include="orders.txt">
+    <Text Include="Order.txt">
       <Filter>Files</Filter>
     </Text>
-    <Text Include="items.txt">
+    <Text Include="Restaurant.txt">
+      <Filter>Files</Filter>
+    </Text>
+    <Text Include="User.txt">
       <Filter>Files</Filter>
     </Text>
-    <Text Include="assignments.txt" />
   </ItemGroup>
 </Project>

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/User.txt

@@ -0,0 +1,9 @@
+1|alex|Alex Miller|1000000010|alex|alex@mail.com|CityOne|RestaurantOwner
+2|jordan|Jordan Smith|1000000020|jordan|jordan@mail.com|CityTwo|RestaurantOwner
+3|taylor|Taylor Brown|1000000030|taylor|taylor@mail.com|CityThree|RestaurantOwner
+4|emma|Emma Wilson|1000000040|emma|emma@mail.com|CityOne|Customer
+5|liam|Liam Johnson|1000000050|liam|liam@mail.com|CityTwo|Customer
+6|olivia|Olivia Davis|1000000060|olivia|olivia@mail.com|CityThree|Customer
+7|noah|Noah Anderson|1000000070|noah|noah@mail.com|CityOne|DeliveryPartner
+8|ava|Ava Martinez|1000000080|ava|ava@mail.com|CityTwo|DeliveryPartner
+9|ethan|Ethan Thomas|1000000090|ethan|ethan@mail.com|CityThree|DeliveryPartner

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Validator.cpp

@@ -0,0 +1,33 @@
+/*
+Author: Joel Mathew Thomas
+Date: 25-02-2026
+*/
+
+#include "Validator.h"
+
+bool util::isPhoneNumberValid(const std::string& phoneNumber) {
+	if (phoneNumber.size() != 10)
+	{
+		return false;
+	}
+	return std::all_of(phoneNumber.begin(), phoneNumber.end(),
+		[](char character) 
+		{
+			return std::isdigit(character);
+		}
+	);
+}
+
+bool util::isEmailValid(const std::string& email) {
+	size_t index = email.find('@');
+	if (index == std::string::npos) return false;
+	if (email.find('@', index + 1) != std::string::npos)
+	{
+		return false;
+	}
+	if (index == 0 || index == email.size() - 1)
+	{
+		return false;
+	}
+	return true;
+}

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/Validator.h

@@ -0,0 +1,15 @@
+/*
+Author: Joel Mathew Thomas
+Date: 25-02-2026
+*/
+
+#pragma once
+#include<string>
+#include<algorithm>
+#include<cctype>
+
+namespace util
+{
+	bool isPhoneNumberValid(const std::string&);
+	bool isEmailValid(const std::string&);
+}

Trenser.FoodDeliveryApp/Trenser.FoodDeliveryApp/menuItems.txt

@@ -1,150 +0,0 @@
-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/users.txt

@@ -1,9 +0,0 @@
-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