Added notifications

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

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

@@ -0,0 +1,38 @@
+using LiteCharms.Infrastructure.Database;
+
+namespace LiteCharms.Features.Refunds.Commands.Handlers;
+
+public class RefundCustomerCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<RefundCustomerCommand, Result<Guid>>
+{
+    public async ValueTask<Result<Guid>> Handle(RefundCustomerCommand request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            if(!await context.Orders.AnyAsync(o => o.Id == request.OrderId, cancellationToken))
+                return Result.Fail<Guid>(new Error($"Order with Id: {request.OrderId} does not exist"));
+
+            if (!await context.Customers.AnyAsync(c => c.Id == request.CustomerId, cancellationToken))
+                return Result.Fail<Guid>(new Error($"Customer with Id: {request.CustomerId} does not exist"));
+
+            if(!await context.Orders.AnyAsync(o => o.Id == request.OrderId && o.CustomerId == request.CustomerId, cancellationToken))
+                return Result.Fail<Guid>(new Error($"Order with Id: {request.OrderId} does not belong to Customer with Id: {request.CustomerId}"));
+
+            var refund = context.OrderRefunds.Add(new Entities.OrderRefund
+            {
+                OrderId = request.OrderId,
+                Reason = request.Reason,
+                Amount = request.Amount
+            });
+
+            return await context.SaveChangesAsync(cancellationToken) > 0
+                ? Result.Ok(refund.Entity.Id)
+                : Result.Fail<Guid>(new Error($"Failed to create refund for OrderId: {request.OrderId}"));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<Guid>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

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

@@ -0,0 +1,38 @@
+namespace LiteCharms.Features.Refunds.Commands;
+
+public class RefundCustomerCommand : IRequest<Result<Guid>>
+{
+    public Guid OrderId { get; set; }
+
+    public Guid CustomerId { get; set; }
+
+    public string? Reason { get; set; }
+
+    public decimal Amount { get; set; }
+
+    private RefundCustomerCommand(Guid orderId, Guid customerId, string? reason, decimal amount)
+    {
+        OrderId = orderId;
+        CustomerId = customerId;
+        Reason = reason;
+        Amount = amount;
+        CustomerId = customerId;
+    }
+
+    public static RefundCustomerCommand Create(Guid orderId, Guid customerId, string? reason, decimal amount)
+    {
+        if (orderId == Guid.Empty)
+            throw new ArgumentException("OrderId is required", nameof(orderId));
+
+        if (customerId == Guid.Empty)
+            throw new ArgumentException("CustomerId is required", nameof(customerId));
+
+        if (amount <= 0)
+            throw new ArgumentException("Amount must be greater than zero", nameof(amount));
+
+        if (string.IsNullOrWhiteSpace(reason))
+            throw new ArgumentException("Reason is required", nameof(reason));
+
+        return new(orderId, customerId, reason, amount);
+    }
+}

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

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

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

@@ -0,0 +1,32 @@
+using LiteCharms.Extensions;
+using LiteCharms.Features.Refunds.Queries;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Refunds.Queries.Handlers;
+
+public class GetCustomerRefundsQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerRefundsQuery, Result<OrderRefund[]>>
+{
+    public async ValueTask<Result<OrderRefund[]>> Handle(GetCustomerRefundsQuery 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<OrderRefund[]>(new Error($"Customer with Id {request.CustomerId} does not exist."));
+
+            var refunds = await context.OrderRefunds.AsNoTracking().AsSplitQuery()
+                .OrderByDescending(o => o.CreatedAt)
+                .Where(r => r.Order!.CustomerId == request.CustomerId).ToArrayAsync(cancellationToken);
+
+            return refunds?.Length > 0 
+                ? Result.Ok(refunds.Select(r => r.ToModel()).ToArray()) 
+                : Result.Fail<OrderRefund[]>(new Error($"No refunds found for customer with Id {request.CustomerId}."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<OrderRefund[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

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));
+        }
+    }
+}