Adapted Price Endpoints

PyroFetes/Specifications/Prices/GetPriceByProductIdAndSupplierIdSpec.cs

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+using Ardalis.Specification;
+using PyroFetes.Models;
+
+namespace PyroFetes.Specifications.Prices;
+
+public sealed class GetPriceByProductIdAndSupplierIdSpec : Specification<Price>
+{
+    public GetPriceByProductIdAndSupplierIdSpec(int? productId, int? supplierId)
+    {
+        Query
+            .Where(p => p.ProductId == productId && p.SupplierId == supplierId);
+    }
+}

PyroFetes/Specifications/Products/GetProductByIdSpec.cs

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+using Ardalis.Specification;
+using PyroFetes.Models;
+
+namespace PyroFetes.Specifications.Products;
+
+public sealed class GetProductByIdSpec : Specification<Product>
+{
+    public GetProductByIdSpec(int? productId)
+    {
+        Query
+            .Where(p => p.Id == productId);
+    }
+}

PyroFetes/Specifications/Suppliers/GetSupplierByIdSpec.cs

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+using Ardalis.Specification;
+using PyroFetes.Models;
+
+namespace PyroFetes.Specifications.Suppliers;
+
+public sealed class GetSupplierByIdSpec : Specification<Supplier>
+{
+    public GetSupplierByIdSpec(int? supplierId)
+    {
+        Query
+            .Where(x => x.Id == supplierId);
+    }
+}