Added support for notifications

LiteCharms.Features/Products/Queries/GetProductPricesQuery.cs

@@ -0,0 +1,18 @@
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Products.Queries;
+
+public class GetProductPricesQuery : IRequest<Result<ProductPrice[]>>
+{
+    public int MaxRecords { get; set; }
+
+    private GetProductPricesQuery(int maxRecords = 1000) => MaxRecords = maxRecords;
+
+    public static GetProductPricesQuery Create(int maxRecords = 1000)
+    {
+        if (maxRecords <= 0)
+            throw new ArgumentOutOfRangeException(nameof(maxRecords), "MaxRecords must be greater than zero.");
+
+        return new(maxRecords);
+    }
+}

LiteCharms.Features/Products/Queries/GetProductsQuery.cs

@@ -4,5 +4,15 @@ namespace LiteCharms.Features.Products.Queries;
 
 public class GetProductsQuery : IRequest<Result<Product[]>>
 {
-    public static GetProductsQuery Create() => new();
+    public int MaxRecords { get; set; }
+
+    private GetProductsQuery(int maxRecords = 1000) => MaxRecords = maxRecords;
+
+    public static GetProductsQuery Create(int maxRecords = 1000)
+    {
+        if (maxRecords <= 0)
+            throw new ArgumentException("MaxRecords must be a positive integer.");
+
+        return new(maxRecords);
+    }
 }

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

@@ -0,0 +1,27 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Products.Queries.Handlers;
+
+public class GetProductPricesQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetProductPricesQuery, Result<ProductPrice[]>>
+{
+    public async ValueTask<Result<ProductPrice[]>> Handle(GetProductPricesQuery request, CancellationToken cancellationToken)
+    {
+        try
+        {
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var products = await context.ProductPrices.AsNoTracking()
+                .OrderByDescending(o => o.Id)
+                .Take(request.MaxRecords)
+                .ToArrayAsync(cancellationToken);
+
+            return Result.Ok(products.Select(p => p.ToModel()).ToArray());
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail<ProductPrice[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}

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

@@ -14,6 +14,7 @@ public class GetProductsQueryHandler(IDbContextFactory<LeadGeneratorDbContext> c
 
             var products = await context.Products.AsNoTracking()
                 .OrderByDescending(o => o.Id)
+                .Take(request.MaxRecords)
                 .ToArrayAsync(cancellationToken);
 
             return Result.Ok(products.Select(p => p.ToModel()).ToArray());