Added notifications

Added shopping cart and items
Added quotes
Refactored relatinoships
Migrated changes
Refactored cqrs commands and queries
Refactored mappings

LiteCharms.Features/Customers/Queries/GetCustomerQuery.cs

@@ -0,0 +1,18 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries;
+
+public class GetCustomerQuery : IRequest<Result<Customer>>
+{
+    public Guid CustomerId { get; set; }
+
+    private GetCustomerQuery(Guid customerId) => CustomerId = customerId;
+
+    public static GetCustomerQuery Create(Guid customerId)
+    {
+        if(customerId == Guid.Empty)
+            throw new ArgumentException("Customer ID is required.", nameof(customerId));
+
+        return new(customerId);
+    }
+}

LiteCharms.Features/Customers/Queries/Handlers/GetCustomerQueryHandler.cs

@@ -0,0 +1,26 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries.Handlers;
+
+public class GetCustomerQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerQuery, Result<Customer>>
+{
+    public async ValueTask<Result<Customer>> Handle(GetCustomerQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var customer = await context.Customers.FirstOrDefaultAsync(c => c.Id == request.CustomerId, cancellationToken);
+
+            return customer is not null
+                ? Result.Ok(customer.ToModel())
+                : Result.Fail<Customer>($"Customer not found with id {request.CustomerId}");
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<Customer>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/LiteCharms.Features.csproj

@@ -61,4 +61,8 @@
     <ProjectReference Include="..\LiteCharms.Infrastructure\LiteCharms.Infrastructure.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="ShoppingCarts\Commands\Handlers\" />
+  </ItemGroup>
+
 </Project>

LiteCharms.Features/Notifications/Commands/CreateNotificationCommand.cs

@@ -0,0 +1,63 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Notifications.Commands;
+
+public class CreateNotificationCommand : IRequest<Result<Guid>>
+{
+    public NotificationDirection Direction { get; set; }
+
+    public string? Author { get; set; }
+
+    public string? Title { get; set; }
+
+    public string? Description { get; set; }
+
+    public string? Platform { get; set; }
+
+    public string? PlatformAddress { get; set; }
+
+    public string? CorrelationId { get; set; }
+
+    public string? CorrelationIdType { get; set; }
+
+    public bool IsInternal { get; set; }
+
+    private CreateNotificationCommand(NotificationDirection direction, string author, string title, string description, string platform, string platformAddress, string correlationId, string correlationIdType, bool isInternal)
+    {
+        Direction = direction;
+        Author = author;
+        Title = title;
+        Description = description;
+        Platform = platform;
+        PlatformAddress = platformAddress;
+        CorrelationId = correlationId;
+        CorrelationIdType = correlationIdType;
+        IsInternal = isInternal;
+    }
+
+    public static CreateNotificationCommand Create(NotificationDirection direction, string author, string title, string description, string platform, string platformAddress, string correlationId, string correlationIdType, bool isInternal)
+    {
+        if (string.IsNullOrWhiteSpace(author))
+            throw new ArgumentException("Author cannot be null or whitespace.", nameof(author));
+
+        if (string.IsNullOrWhiteSpace(title))
+            throw new ArgumentException("Title cannot be null or whitespace.", nameof(title));
+
+        if (string.IsNullOrWhiteSpace(description))
+            throw new ArgumentException("Description cannot be null or whitespace.", nameof(description));
+
+        if (string.IsNullOrWhiteSpace(platform))
+            throw new ArgumentException("Platform cannot be null or whitespace.", nameof(platform));
+
+        if (string.IsNullOrWhiteSpace(platformAddress))
+            throw new ArgumentException("PlatformAddress cannot be null or whitespace.", nameof(platformAddress));
+
+        if (string.IsNullOrWhiteSpace(correlationId))
+            throw new ArgumentException("CorrelationId cannot be null or whitespace.", nameof(correlationId));
+
+        if (string.IsNullOrWhiteSpace(correlationIdType))
+            throw new ArgumentException("CorrelationIdType cannot be null or whitespace.", nameof(correlationIdType));
+
+        return new(direction, author, title, description, platform, platformAddress, correlationId, correlationIdType, isInternal);
+    }
+}

LiteCharms.Features/Notifications/Commands/Handlers/CreateNotificationCommandHandler.cs

@@ -0,0 +1,35 @@
+using LiteCharms.Infrastructure.Database;
+
+namespace LiteCharms.Features.Notifications.Commands.Handlers;
+
+public class CreateNotificationCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<CreateNotificationCommand, Result<Guid>>
+{
+    public async ValueTask<Result<Guid>> Handle(CreateNotificationCommand request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var newNotification = context.Notifications.Add(new Entities.Notification
+            {
+                Direction = request.Direction,
+                Author = request.Author,
+                Title = request.Title,
+                Description = request.Description,
+                Platform = request.Platform,
+                PlatformAddress = request.PlatformAddress,
+                CorrelationId = request.CorrelationId,
+                CorrelationIdType = request.CorrelationIdType,
+                IsInternal = request.IsInternal,
+            });
+
+            return newNotification is not null 
+                ? Result.Ok(newNotification.Entity.Id) 
+                : Result.Fail(new Error("Failed to create notification"));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Notifications/Commands/Handlers/UpdateNotificationCommandHandler.cs

@@ -0,0 +1,29 @@
+using LiteCharms.Infrastructure.Database;
+
+namespace LiteCharms.Features.Notifications.Commands.Handlers;
+
+public class UpdateNotificationCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<UpdateNotificationCommand, Result>
+{
+    public async ValueTask<Result> Handle(UpdateNotificationCommand request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var notification = await context.Notifications.FirstOrDefaultAsync(n => n.Id == request.NotificationId, cancellationToken);
+
+            if(notification is null)
+                return Result.Fail(new Error($"Notification with id {request.NotificationId} not found."));
+
+            notification.Processed = request.Processed;
+
+            return await context.SaveChangesAsync(cancellationToken) > 0
+                ? Result.Ok()
+                : Result.Fail(new Error($"Failed to update notification with id {request.NotificationId}."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Notifications/Commands/UpdateNotificationCommand.cs

@@ -0,0 +1,22 @@
+namespace LiteCharms.Features.Notifications.Commands;
+
+public class UpdateNotificationCommand : IRequest<Result>
+{
+    public Guid NotificationId { get; set; }
+
+    public bool Processed { get; set; }
+
+    private UpdateNotificationCommand(Guid notificationId, bool processed)
+    {
+        NotificationId = notificationId;
+        Processed = processed;
+    }
+
+    public static UpdateNotificationCommand Create(Guid notificationId, bool processed) 
+    { 
+        if(notificationId == Guid.Empty)
+            throw new ArgumentException("Notification ID cannot be empty.", nameof(notificationId));
+
+        return new(notificationId, processed);
+    }
+}

LiteCharms.Features/Notifications/Queries/GetNotificationQuery.cs

@@ -0,0 +1,18 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Notifications.Queries;
+
+public class GetNotificationQuery : IRequest<Result<Notification>>
+{
+    public Guid NotificationId { get; set; }
+
+    private GetNotificationQuery(Guid notificationId) => NotificationId = notificationId;
+
+    public static GetNotificationQuery Create(Guid notificationId)
+    {
+        if (notificationId == Guid.Empty)
+            throw new ArgumentException("Notification ID is required.", nameof(notificationId));
+
+        return new(notificationId);
+    }
+}

LiteCharms.Features/Notifications/Queries/Handlers/GetNotificationQueryHandler.cs

@@ -0,0 +1,26 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Notifications.Queries.Handlers;
+
+public class GetNotificationQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetNotificationQuery, Result<Notification>>
+{
+    public async ValueTask<Result<Notification>> Handle(GetNotificationQuery request, CancellationToken cancellationToken)
+    {
+        try
+        {
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var notification = await context.Notifications.FindAsync(new object[] { request.NotificationId }, cancellationToken);
+
+            return notification is not null 
+                ? Result.Ok(notification.ToModel())
+                : Result.Fail<Notification>(new Error($"Notification with id {request.NotificationId} not found"));
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail<Notification>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Notifications/Queries/Handlers/GetNotificationsQueryHandler.cs

@@ -15,7 +15,7 @@ public class GetNotificationsQueryHandler(IDbContextFactory<LeadGeneratorDbConte
 
             using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var notifications = await context.Notifications
+            var notifications = await context.Notifications.AsNoTracking()
                 .Where(n => n.CreatedAt >= fromDate && n.CreatedAt <= toDate)
                 .OrderByDescending(n => n.CreatedAt)
                 .Take(request.MaxRecords)

LiteCharms.Features/Orders/Commands/CreateOrderCommand.cs

@@ -4,22 +4,25 @@ public class CreateOrderCommand : IRequest<Result<Guid>>
 {
     public Guid CustomerId { get; set; }
 
-    public Guid ProductPriceId { get; set; }
+    public Guid ShoppingCartId { get; set; }
 
-    private CreateOrderCommand(Guid customerId, Guid productPriceId)
+    public Guid? QuoteId { get; set; }
+
+    private CreateOrderCommand(Guid customerId, Guid shoppingCartId, Guid? quoteId = null)
     {
         CustomerId = customerId;
-        ProductPriceId = productPriceId;
+        ShoppingCartId = shoppingCartId;
+        QuoteId = quoteId;
     }
 
-    public static CreateOrderCommand Create(Guid customerId, Guid productPriceId)
+    public static CreateOrderCommand Create(Guid customerId, Guid shoppingCartId, Guid? quoteId = null)
     {
         if (customerId == Guid.Empty)
             throw new ArgumentException("CustomerId is required.", nameof(customerId));
 
-        if (productPriceId == Guid.Empty)
-            throw new ArgumentException("ProductPriceId is required.", nameof(productPriceId));
+        if (shoppingCartId == Guid.Empty)
+            throw new ArgumentException("ShoppingCartId is required.", nameof(shoppingCartId));
 
-        return new(customerId, productPriceId);
+        return new(customerId, shoppingCartId, quoteId);
     }
 }

LiteCharms.Features/Orders/Commands/Handlers/CreateOrderCommandHandler.cs

@@ -10,16 +10,26 @@ public class CreateOrderCommandHandler(IDbContextFactory<LeadGeneratorDbContext>
 		{
             using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
+            if(!await context.Customers.AnyAsync(c => c.Id == request.CustomerId, cancellationToken))
+                return Result.Fail<Guid>(new Error($"Customer {request.CustomerId} does not exist."));
+
+            if(!await context.ShoppingCarts.AnyAsync(sc => sc.Id == request.ShoppingCartId, cancellationToken))
+                return Result.Fail<Guid>(new Error($"Shopping cart {request.ShoppingCartId} does not exist."));
+
+            if(request.QuoteId.HasValue && !await context.Quotes.AnyAsync(q => q.Id == request.QuoteId.Value, cancellationToken))
+                return Result.Fail<Guid>(new Error($"Quote {request.QuoteId.Value} does not exist."));
+
             var newOrder = context.Orders.Add(new Entities.Order
             {
                 CustomerId = request.CustomerId,
-                ProductPriceId = request.ProductPriceId,
+                ShoppingCartId = request.ShoppingCartId,
+                QuoteId = request.QuoteId,
                 CreatedAt = DateTime.UtcNow
             });
 
             return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok(newOrder.Entity.Id)
-                : Result.Fail<Guid>(new Error($"Failed to create customer {request.CustomerId} order using product price {request.ProductPriceId}."));
+                : Result.Fail<Guid>(new Error($"Failed to create customer {request.CustomerId} order using shopping cart {request.ShoppingCartId}."));
         }
 		catch (Exception ex)
 		{

LiteCharms.Features/Orders/Commands/Handlers/UpdateOrderStatusCommandHandler.cs

@@ -2,9 +2,9 @@
 
 namespace LiteCharms.Features.Orders.Commands.Handlers;
 
-public class UpdateOrderCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<UpdateOrderCommand, Result>
+public class UpdateOrderStatusCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<UpdateOrderStatusCommand, Result>
 {
-    public async ValueTask<Result> Handle(UpdateOrderCommand request, CancellationToken cancellationToken)
+    public async ValueTask<Result> Handle(UpdateOrderStatusCommand request, CancellationToken cancellationToken)
     {
 		try
 		{

LiteCharms.Features/Orders/Commands/UpdateOrderStatusCommand.cs

@@ -2,7 +2,7 @@
 
 namespace LiteCharms.Features.Orders.Commands;
 
-public class UpdateOrderCommand : IRequest<Result>
+public class UpdateOrderStatusCommand : IRequest<Result>
 {
     public Guid OrderId { get; set; }
 
@@ -10,14 +10,14 @@ public class UpdateOrderCommand : IRequest<Result>
 
     public string? Note { get; set; }
 
-    private UpdateOrderCommand(Guid orderId, OrderStatus status, string? note)
+    private UpdateOrderStatusCommand(Guid orderId, OrderStatus status, string? note)
     {
         OrderId = orderId;
         Status = status;
         Note = note;
     }
 
-    public static UpdateOrderCommand Create(Guid orderId, OrderStatus status, string? note)
+    public static UpdateOrderStatusCommand Create(Guid orderId, OrderStatus status, string? note)
     {
         if (orderId == Guid.Empty)
             throw new ArgumentException("OrderId is required.", nameof(orderId));

LiteCharms.Features/Orders/Queries/GetCustomerOrdersQuery.cs

@@ -1,6 +1,6 @@
 using LiteCharms.Models;
 
-namespace LiteCharms.Features.Customers.Queries;
+namespace LiteCharms.Features.Orders.Queries;
 
 public class GetCustomerOrdersQuery : IRequest<Result<Order[]>>
 {

LiteCharms.Features/Orders/Queries/Handlers/GetCustomerOrdersQueryHandler.cs

@@ -2,7 +2,7 @@
 using LiteCharms.Infrastructure.Database;
 using LiteCharms.Models;
 
-namespace LiteCharms.Features.Customers.Queries.Handlers;
+namespace LiteCharms.Features.Orders.Queries.Handlers;
 
 public class GetCustomerOrdersQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerOrdersQuery, Result<Order[]>>
 {
@@ -12,6 +12,9 @@ public class GetCustomerOrdersQueryHandler(IDbContextFactory<LeadGeneratorDbCont
 		{
             using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
+            if(!await context.Customers.AsNoTracking().AnyAsync(c => c.Id == request.CustomerId, cancellationToken))
+                return Result.Fail<Order[]>(new Error($"Customer with Id {request.CustomerId} does not exist."));
+
             var orders = await context.Orders.AsNoTracking()
                 .OrderByDescending(o => o.CreatedAt)
                 .Where(o => o.CustomerId == request.CustomerId)

LiteCharms.Features/Products/Queries/Handlers/GetProductPriceQueryHandler.cs

@@ -12,6 +12,9 @@ public class GetProductPriceQueryHandler(IDbContextFactory<LeadGeneratorDbContex
 		{
             using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
+            if(!await context.Products.AnyAsync(p => p.Id == request.ProductId, cancellationToken))
+                return Result.Fail<ProductPrice>(new Error($"Product {request.ProductId} not found."));
+
             var productPrice = await context.ProductPrices.AsNoTracking()
                 .Where(pp => pp.ProductId == request.ProductId && pp.Active)
                 .OrderByDescending(pp => pp.CreatedAt)

LiteCharms.Features/Quotes/Commands/AssignQuoteToOrderCommand.cs

@@ -0,0 +1,25 @@
+namespace LiteCharms.Features.Quotes.Commands;
+
+public class AssignQuoteToOrderCommand : IRequest<Result>
+{
+    public Guid OrderId { get; set; }
+
+    public Guid QuoteId { get; set; }
+
+    private AssignQuoteToOrderCommand(Guid orderId, Guid quoteId)
+    {
+        OrderId = orderId;
+        QuoteId = quoteId;
+    }
+
+    public static AssignQuoteToOrderCommand Create(Guid orderId, Guid quoteId)
+    {
+        if(orderId == Guid.Empty)
+            throw new ArgumentException("Order ID is required.", nameof(orderId));
+
+        if(quoteId == Guid.Empty)
+            throw new ArgumentException("Quote ID is required.", nameof(quoteId));
+
+        return new AssignQuoteToOrderCommand(orderId, quoteId);
+    }
+}

LiteCharms.Features/Quotes/Commands/AssignQuoteToShoppingCartCommand.cs

@@ -0,0 +1,25 @@
+namespace LiteCharms.Features.Quotes.Commands;
+
+public class AssignQuoteToShoppingCartCommand : IRequest<Result>
+{
+    public Guid QuoteId { get; set; }
+
+    public Guid ShoppingCartId { get; set; }
+
+    private AssignQuoteToShoppingCartCommand(Guid quoteId, Guid shoppingCartId)
+    {
+        QuoteId = quoteId;
+        ShoppingCartId = shoppingCartId;
+    }
+
+    public static AssignQuoteToShoppingCartCommand Create(Guid quoteId, Guid shoppingCartId)
+    {
+        if(quoteId == Guid.Empty)
+            throw new ArgumentException("QuoteId cannot be empty.", nameof(quoteId));
+
+        if (shoppingCartId == Guid.Empty)
+            throw new ArgumentException("ShoppingCartId cannot be empty.", nameof(shoppingCartId));
+
+        return new(quoteId, shoppingCartId);
+    }
+}

LiteCharms.Features/Quotes/Commands/Handlers/AssignQuoteToOrderCommandHandler.cs

@@ -0,0 +1,35 @@
+using LiteCharms.Infrastructure.Database;
+
+namespace LiteCharms.Features.Quotes.Commands.Handlers;
+
+public class AssignQuoteToOrderCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<AssignQuoteToOrderCommand, Result>
+{
+    public async ValueTask<Result> Handle(AssignQuoteToOrderCommand request, CancellationToken cancellationToken)
+    {
+        try
+        {
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var order = await context.Orders.FirstOrDefaultAsync(o => o.Id == request.OrderId, cancellationToken);
+
+            if (order is null)
+                return Result.Fail(new Error($"Order with id {request.OrderId} not found"));
+
+            if(!await context.Quotes.AnyAsync(q => q.Id == request.OrderId, cancellationToken))
+                return Result.Fail(new Error($"Quote with id {request.QuoteId} not found"));
+
+            if(order.QuoteId == request.QuoteId)
+                return Result.Fail(new Error($"Quote with id {request.QuoteId} is already assigned to order with id {request.OrderId}"));
+
+            order.QuoteId = request.QuoteId;
+
+            return await context.SaveChangesAsync(cancellationToken) > 0
+                ? Result.Ok()
+                : Result.Fail(new Error($"Failed to assign quote with id {request.QuoteId} to order with id {request.OrderId}"));
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Quotes/Commands/Handlers/AssignQuoteToShoppingCartCommandHandler.cs

@@ -0,0 +1,32 @@
+using LiteCharms.Infrastructure.Database;
+
+namespace LiteCharms.Features.Quotes.Commands.Handlers;
+
+public class AssignQuoteToShoppingCartCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<AssignQuoteToShoppingCartCommand, Result>
+{
+    public async ValueTask<Result> Handle(AssignQuoteToShoppingCartCommand request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var shoppingCart = await context.Orders.FirstOrDefaultAsync(o => o.Id == request.ShoppingCartId, cancellationToken);
+
+            if (shoppingCart is null)
+                return Result.Fail(new Error($"ShoppingCart with id {request.ShoppingCartId} not found"));
+
+            if(!await context.Quotes.AnyAsync(q => q.Id == request.QuoteId, cancellationToken))
+                return Result.Fail(new Error($"Quote with id {request.QuoteId} not found"));
+
+            shoppingCart.QuoteId = request.QuoteId;
+
+            return await context.SaveChangesAsync(cancellationToken) > 0
+                ? Result.Ok()
+                : Result.Fail(new Error("Failed to assign quote to shopping cart"));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Quotes/Commands/Handlers/UpdateQuoteStatusCommandHandler.cs

@@ -0,0 +1,29 @@
+using LiteCharms.Infrastructure.Database;
+
+namespace LiteCharms.Features.Quotes.Commands.Handlers;
+
+public class UpdateQuoteStatusCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<UpdateQuoteStatusCommand, Result>
+{
+    public async ValueTask<Result> Handle(UpdateQuoteStatusCommand request, CancellationToken cancellationToken)
+    {
+        try
+        {
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var quote = await context.Quotes.FirstOrDefaultAsync(q => q.Id == request.QuoteId, cancellationToken);
+
+            if (quote is null)
+                return Result.Fail(new Error("Quote not found."));
+
+            quote.Status = request.Status;
+
+            return await context.SaveChangesAsync(cancellationToken) > 0
+                ? Result.Ok()
+                : Result.Fail(new Error("Failed to update quote status."));
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Quotes/Commands/UpdateQuoteStatusCommand.cs

@@ -0,0 +1,24 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Quotes.Commands;
+
+public class UpdateQuoteStatusCommand : IRequest<Result>
+{
+    public Guid QuoteId { get; set; }
+
+    public QuoteStatus Status { get; set; }
+
+    private UpdateQuoteStatusCommand(Guid quoteId, QuoteStatus status)
+    {
+        QuoteId = quoteId;
+        Status = status;
+    }
+
+    public static UpdateQuoteStatusCommand Create(Guid quoteId, QuoteStatus status)
+    {
+        if(quoteId == Guid.Empty)
+            throw new ArgumentException("Quote ID cannot be empty.", nameof(quoteId));
+
+        return new(quoteId, status);
+    }
+}

LiteCharms.Features/Quotes/Queries/GetCustomerQuotesQuery.cs

@@ -0,0 +1,18 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Quotes.Queries;
+
+public class GetCustomerQuotesQuery : IRequest<Result<Quote[]>>
+{
+    public Guid CustomerId { get; set; }
+
+    private GetCustomerQuotesQuery(Guid customerId) => CustomerId = customerId;
+
+    public static GetCustomerQuotesQuery Create(Guid customerId)
+    {
+        if (customerId == Guid.Empty)
+            throw new ArgumentException("CustomerId is required.");
+
+        return new(customerId);
+    }
+}

LiteCharms.Features/Quotes/Queries/GetQuoteQuery.cs

@@ -0,0 +1,18 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Quotes.Queries;
+
+public class GetQuoteQuery : IRequest<Result<Quote>>
+{
+    public Guid QuoteId { get; set; }
+
+    private GetQuoteQuery(Guid quoteId) => QuoteId = quoteId;
+
+    public static GetQuoteQuery Create(Guid quoteId)
+    {
+        if(quoteId == Guid.Empty)
+            throw new ArgumentException("Quote ID is required.", nameof(quoteId));
+
+        return new(quoteId);
+    }
+}

LiteCharms.Features/Quotes/Queries/GetQuotesQuery.cs

@@ -0,0 +1,30 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Quotes.Queries;
+
+public class GetQuotesQuery : IRequest<Result<Quote[]>>
+{
+    public DateOnly From { get; set; }
+
+    public DateOnly To { get; set; }
+
+    public int MaxRecords { get; set; }
+
+    private GetQuotesQuery(DateOnly from, DateOnly to, int maxRecords = 1000)
+    {
+        From = from;
+        To = to;
+        MaxRecords = maxRecords;
+    }
+
+    public static GetQuotesQuery Create(DateOnly from, DateOnly to, int maxRecords = 1000)
+    {
+        if (from > to)
+            throw new ArgumentException("From date cannot be greater than To date.");
+
+        if (maxRecords <= 0)
+            throw new ArgumentException("MaxRecords must be a positive integer.");
+
+        return new(from, to, maxRecords);
+    }
+}

LiteCharms.Features/Quotes/Queries/Handlers/GetCustomerQuotesQueryHandler.cs

@@ -0,0 +1,31 @@
+using LiteCharms.Extensions;
+using LiteCharms.Features.Quotes.Queries;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Quotes.Queries.Handlers;
+
+public class GetCustomerQuotesQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerQuotesQuery, Result<Quote[]>>
+{
+    public async ValueTask<Result<Quote[]>> Handle(GetCustomerQuotesQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            if (!await context.Customers.AnyAsync(c => c.Id == request.CustomerId, cancellationToken))
+                return Result.Fail<Quote[]>(new Error($"Customer with Id {request.CustomerId} does not exist."));
+
+            var quotes = await context.Quotes.AsNoTracking()
+                .Where(q => q.CustomerId == request.CustomerId).ToArrayAsync(cancellationToken);
+
+            return quotes?.Length > 0
+                ? Result.Ok(quotes.Select(q => q.ToModel()).ToArray())
+                : Result.Fail<Quote[]>(new Error($"No quotes found for customer with Id {request.CustomerId}."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<Quote[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Quotes/Queries/Handlers/GetQuoteQueryHandler.cs

@@ -0,0 +1,26 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Quotes.Queries.Handlers;
+
+public class GetQuoteQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetQuoteQuery, Result<Quote>>
+{
+    public async ValueTask<Result<Quote>> Handle(GetQuoteQuery request, CancellationToken cancellationToken)
+    {
+        try
+        {
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var quote = await context.Quotes.AsNoTracking().FirstOrDefaultAsync(q => q.Id == request.QuoteId, cancellationToken);
+
+            return quote is not null
+                ? Result.Ok(quote.ToModel())
+                : Result.Fail<Quote>(new Error($"Quote with ID {request.QuoteId} not found."));
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail<Quote>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Quotes/Queries/Handlers/GetQuotesHandler.cs

@@ -0,0 +1,33 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Quotes.Queries.Handlers;
+
+public class GetQuotesHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetQuotesQuery, Result<Quote[]>>
+{
+    public async ValueTask<Result<Quote[]>> Handle(GetQuotesQuery request, CancellationToken cancellationToken)
+    {
+        try
+        {
+            var fromDate = request.From.ToDateTime(TimeOnly.MinValue);
+            var toDate = request.To.ToDateTime(TimeOnly.MaxValue);
+
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var quotes = await context.Quotes.AsNoTracking()
+                .OrderByDescending(o => o.CreatedAt)
+                .Where(o => o.CreatedAt >= fromDate && o.CreatedAt <= toDate)
+                .Take(request.MaxRecords)
+                .ToArrayAsync(cancellationToken);
+
+            return quotes?.Length > 0
+                ? Result.Ok(quotes.Select(o => o.ToModel()).ToArray())
+                : Result.Fail<Quote[]>(new Error($"No quotes found for the specified date range {request.From} - {request.To}."));
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail<Quote[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Refunds/Commands/Handlers/RefundCustomerCommandHandler.cs

@@ -1,6 +1,6 @@
 using LiteCharms.Infrastructure.Database;
 
-namespace LiteCharms.Features.Customers.Commands.Handlers;
+namespace LiteCharms.Features.Refunds.Commands.Handlers;
 
 public class RefundCustomerCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<RefundCustomerCommand, Result<Guid>>
 {

LiteCharms.Features/Refunds/Commands/Handlers/UpdateOrderRefundCommandHandler.cs

@@ -0,0 +1,30 @@
+using LiteCharms.Infrastructure.Database;
+
+namespace LiteCharms.Features.Refunds.Commands.Handlers;
+
+public class UpdateOrderRefundCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<UpdateOrderRefundCommand, Result>
+{
+    public async ValueTask<Result> Handle(UpdateOrderRefundCommand request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var refund = await context.OrderRefunds.FirstOrDefaultAsync(r => r.Id == request.OrderRefundId, cancellationToken);
+
+            if (refund is null)
+                return Result.Fail($"Order refund not found with id {request.OrderRefundId}");
+
+            refund.Reason = request.Reason;
+            refund.Amount = request.Amount;
+
+            return await context.SaveChangesAsync(cancellationToken) > 0
+                ? Result.Ok()
+                : Result.Fail($"Failed to update order refund {request.OrderRefundId}");
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/Refunds/Commands/RefundCustomerCommand.cs

@@ -1,4 +1,4 @@
-namespace LiteCharms.Features.Customers.Commands;
+namespace LiteCharms.Features.Refunds.Commands;
 
 public class RefundCustomerCommand : IRequest<Result<Guid>>
 {

LiteCharms.Features/Refunds/Commands/UpdateOrderRefundCommand.cs

@@ -0,0 +1,28 @@
+namespace LiteCharms.Features.Refunds.Commands;
+
+public class UpdateOrderRefundCommand : IRequest<Result>
+{
+    public Guid OrderRefundId { get; set; }
+
+    public string? Reason { get; set; }
+
+    public decimal Amount { get; set; }
+
+    private UpdateOrderRefundCommand(Guid orderRefundId, string? reason, decimal amount)
+    {
+        OrderRefundId = orderRefundId;
+        Reason = reason;
+        Amount = amount;
+    }
+
+    public static UpdateOrderRefundCommand Create(Guid orderRefundId, string? reason, decimal amount)
+    {
+        if (orderRefundId == Guid.Empty)
+            throw new ArgumentException("Order refund id is required.", nameof(orderRefundId));
+
+        if (string.IsNullOrWhiteSpace(reason))
+            throw new ArgumentException("Refund update reason is required");
+        
+        return new(orderRefundId, reason, amount);
+    }
+}

LiteCharms.Features/Refunds/Queries/GetCustomerRefundsQuery.cs

@@ -1,6 +1,6 @@
 using LiteCharms.Models;
 
-namespace LiteCharms.Features.Customers.Queries;
+namespace LiteCharms.Features.Refunds.Queries;
 
 public class GetCustomerRefundsQuery : IRequest<Result<OrderRefund[]>>
 {

LiteCharms.Features/Refunds/Queries/GetRefundQuery.cs

@@ -0,0 +1,18 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Refunds.Queries;
+
+public class GetRefundQuery : IRequest<Result<OrderRefund>>
+{
+    public Guid OrderRefundId { get; set; }
+
+    private GetRefundQuery(Guid orderRefundId) => OrderRefundId = orderRefundId;
+
+    public static GetRefundQuery Create(Guid orderRefundId)
+    {
+        if(orderRefundId == Guid.Empty)
+            throw new ArgumentException("Customer ID is required.", nameof(orderRefundId));
+
+        return new(orderRefundId);
+    }
+}

LiteCharms.Features/Refunds/Queries/Handlers/GetCustomerRefundsQueryHandler.cs

@@ -1,8 +1,9 @@
 using LiteCharms.Extensions;
+using LiteCharms.Features.Refunds.Queries;
 using LiteCharms.Infrastructure.Database;
 using LiteCharms.Models;
 
-namespace LiteCharms.Features.Customers.Queries.Handlers;
+namespace LiteCharms.Features.Refunds.Queries.Handlers;
 
 public class GetCustomerRefundsQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerRefundsQuery, Result<OrderRefund[]>>
 {

LiteCharms.Features/Refunds/Queries/Handlers/GetRefundQueryHandler.cs

@@ -0,0 +1,26 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Refunds.Queries.Handlers;
+
+public class GetRefundQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetRefundQuery, Result<OrderRefund>>
+{
+    public async ValueTask<Result<OrderRefund>> Handle(GetRefundQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var refund = await context.OrderRefunds.AsNoTracking().FirstOrDefaultAsync(r => r.Id == request.OrderRefundId, cancellationToken);
+
+            return refund is not null
+                ? Result.Ok(refund.ToModel())
+                : Result.Fail<OrderRefund>($"Order refund could not be found with id {request.OrderRefundId}");
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<OrderRefund>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/ShoppingCarts/Commands/CreateShoppingCartCommand.cs

@@ -0,0 +1,6 @@
+namespace LiteCharms.Features.ShoppingCarts.Commands;
+
+public class CreateShoppingCartCommand : IRequest<Result>
+{
+
+}

LiteCharms.Features/ShoppingCarts/Queries/GetCustomerShoppingCartsQuery.cs

@@ -0,0 +1,18 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.ShoppingCarts.Queries;
+
+public class GetCustomerShoppingCartsQuery : IRequest<Result<ShoppingCart[]>>
+{
+    public Guid CustomerId { get; set; }
+
+    private GetCustomerShoppingCartsQuery(Guid customerId) => CustomerId = customerId;
+
+    public static GetCustomerShoppingCartsQuery Create(Guid customerId)
+    {
+        if(customerId == Guid.Empty)
+            throw new ArgumentException("Customer ID is required.", nameof(customerId));
+
+        return new(customerId);
+    }
+}

LiteCharms.Features/ShoppingCarts/Queries/GetShoppingCartQuery.cs

@@ -0,0 +1,18 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.ShoppingCarts.Queries;
+
+public class GetShoppingCartQuery : IRequest<Result<ShoppingCart>>
+{
+    public Guid ShoppingCartId { get; set; }
+
+    private GetShoppingCartQuery(Guid shoppingCartId) => ShoppingCartId = shoppingCartId;
+
+    public static GetShoppingCartQuery Create(Guid shoppingCartId)
+    {
+        if (shoppingCartId == Guid.Empty)
+            throw new ArgumentException($"Shopping cart id is required", nameof(shoppingCartId));
+
+        return new(shoppingCartId);
+    }
+}

LiteCharms.Features/ShoppingCarts/Queries/Handlers/GetCustomerShoppingCartsQueryHandler.cs

@@ -0,0 +1,30 @@
+using LiteCharms.Extensions;
+using LiteCharms.Features.ShoppingCarts.Queries;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.ShoppingCarts.Queries.Handlers;
+
+public class GetCustomerShoppingCartsQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerShoppingCartsQuery, Result<ShoppingCart[]>>
+{
+    public async ValueTask<Result<ShoppingCart[]>> Handle(GetCustomerShoppingCartsQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            if (!await context.Customers.AnyAsync(c => c.Id == request.CustomerId, cancellationToken))
+                return Result.Fail<ShoppingCart[]>(new Error($"Customer with Id {request.CustomerId} does not exist."));
+
+            var shoppingCarts = await context.ShoppingCarts.Where(sc => sc.CustomerId == request.CustomerId).ToArrayAsync(cancellationToken);
+
+            return shoppingCarts?.Length > 0
+                ? Result.Ok(shoppingCarts.Select(c => c.ToModel()).ToArray())
+                : Result.Fail<ShoppingCart[]>(new Error($"No shopping carts found for customer with Id {request.CustomerId}."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<ShoppingCart[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

LiteCharms.Features/ShoppingCarts/Queries/Handlers/GetShoppingCartQueryHandler.cs

@@ -0,0 +1,26 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.ShoppingCarts.Queries.Handlers;
+
+public class GetShoppingCartQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetShoppingCartQuery, Result<ShoppingCart>>
+{
+    public async ValueTask<Result<ShoppingCart>> Handle(GetShoppingCartQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var cart = await context.ShoppingCarts.AsNoTracking().FirstOrDefaultAsync(c => c.Id == request.ShoppingCartId, cancellationToken);
+
+            return cart is not null
+                ? Result.Ok(cart.ToModel())
+                : Result.Fail<ShoppingCart>($"Failed to find shopping cart with id {request.ShoppingCartId}");
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<ShoppingCart>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}