implemented transactions display on sale of products and print them:

:wq

;

@@ -0,0 +1,45 @@
+
+# Please enter the commit message for your changes. Lines starting
+# with '#' will be ignored, and an empty message aborts the commit.
+#
+# On branch main
+# Your branch is up to date with 'origin/main'.
+#
+# Changes to be committed:
+#	modified:   .DS_Store
+#	modified:   Controllers/CategoriesController.cs
+#	deleted:    Models/CategoryRepositoruy.cs
+#	modified:   Program.cs
+#	modified:   Views/Categories/Index.cshtml
+#	modified:   Views/Shared/_Layout.cshtml
+#	modified:   bin/Debug/net8.0/demoMvcCore.dll
+#	modified:   bin/Debug/net8.0/demoMvcCore.pdb
+#	modified:   demoMvcCore.csproj
+#	modified:   obj/Debug/net8.0/demoMvcCore.AssemblyInfo.cs
+#	modified:   obj/Debug/net8.0/demoMvcCore.AssemblyInfoInputs.cache
+#	modified:   obj/Debug/net8.0/demoMvcCore.GeneratedMSBuildEditorConfig.editorconfig
+#	modified:   obj/Debug/net8.0/demoMvcCore.csproj.CoreCompileInputs.cache
+#	modified:   obj/Debug/net8.0/demoMvcCore.csproj.FileListAbsolute.txt
+#	modified:   obj/Debug/net8.0/demoMvcCore.dll
+#	modified:   obj/Debug/net8.0/demoMvcCore.pdb
+#	modified:   obj/Debug/net8.0/ref/demoMvcCore.dll
+#	modified:   obj/Debug/net8.0/refint/demoMvcCore.dll
+#	modified:   wwwroot/css/site.css
+#
+# Untracked files:
+#	Controllers/ProductsController.cs
+#	Controllers/SalesController.cs
+#	Controllers/TransactionsController.cs
+#	Models/CategoryRepository.cs
+#	Models/Product.cs
+#	Models/ProductRepository.cs
+#	Models/Transaction.cs
+#	Models/TransactionsRepository.cs
+#	ViewComponents/
+#	ViewModels/
+#	Views/Products/
+#	Views/Sales/
+#	Views/Shared/Components/
+#	Views/Transactions/
+#	obj/Debug/net8.0/demoMvcCore.sourcelink.json
+#

Controllers/CategoriesController.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using demoMvcCore.Models;
+using demoMvcCore.Models;
 using Microsoft.AspNetCore.Mvc;
 
 // For more information on enabling MVC for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860
@@ -38,13 +34,14 @@ public IActionResult Edit(Category category)
                 CategoryRepository.UpdateCategory(category.CategoryId, category);
                 return RedirectToAction(nameof(Index));
             }
+            ViewBag.OnClick = "edit";
             return View(category);
         }
 
 
         public IActionResult Add()
         {
-            //ViewData["OnClick"] = "add";
+
             ViewBag.OnClick = "add";
             return View();
         }
@@ -58,11 +55,11 @@ public IActionResult Add(Category category)
                 return RedirectToAction(nameof(Index));
 
             }
-
+            ViewBag.OnClick = "add";
             return View(category);
         }
 
-        [HttpGet]
+
         public IActionResult Delete(int categoryId)
         {
             CategoryRepository.DeleteCategory(categoryId);

Controllers/ProductsController.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+using demoMvcCore.Models;
+using demoMvcCore.ViewModels;
+using Microsoft.AspNetCore.Cors;
+using Microsoft.AspNetCore.Mvc;
+
+// For more information on enabling MVC for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860
+
+namespace demoMvcCore.Controllers
+{
+    public class ProductsController : Controller
+    {
+        // GET: /<controller>/
+        public IActionResult Index()
+        {
+            var products = ProductsRepository.GetProducts(loadCategory:true);
+            return View(products);
+
+        }
+
+        public IActionResult Add()
+        {
+            ViewBag.Action = "add";
+            var productViewModels = new ProductsViewModel
+            {
+                Categories = CategoryRepository.GetCategories(),
+                //Product
+            };
+            return View(productViewModels);
+
+
+        }
+
+        [HttpPost]
+        public IActionResult Add(ProductsViewModel productsViewModel)
+        {
+            if (ModelState.IsValid)
+            {
+                ProductsRepository.AddProduct(productsViewModel.Product);
+                return RedirectToAction(nameof(Index));
+            }
+            ViewBag.Action = "edit";
+            productsViewModel.Categories = CategoryRepository.GetCategories();
+            return View(productsViewModel);
+        }
+
+
+
+
+        public IActionResult Edit(int id)
+        {
+            ViewBag.Action = "edit";
+            var productView = new ProductsViewModel
+            {
+                Product = ProductsRepository.GetProductById(id) ?? new Product(),
+                Categories = CategoryRepository.GetCategories()
+            };
+            return View(productView);
+        }
+
+        [HttpPost]
+
+        public IActionResult Edit(ProductsViewModel productsViewModel)
+        {
+            if (ModelState.IsValid)
+            {
+                ProductsRepository.UpdateProduct(productsViewModel.Product.ProductId, productsViewModel.Product);
+
+                return RedirectToAction(nameof(Index));
+            }
+            ViewBag.Action = "edit";
+            productsViewModel.Categories = CategoryRepository.GetCategories();
+            return View(productsViewModel);
+        }
+
+
+        public IActionResult Delete(int id)
+        {
+            ProductsRepository.DeleteProduct(id);
+            return RedirectToAction(nameof(Index));
+        }
+
+        public IActionResult ProductsByCategoryPartial(int categoryId)
+        {
+            var products = ProductsRepository.GetProductsByCategoryId(categoryId);
+            return PartialView("_Product",products);
+
+        }
+
+
+
+
+
+    }
+}
+

Controllers/SalesController.cs

@@ -0,0 +1,58 @@
+using demoMvcCore.Models;
+using demoMvcCore.ViewModels;
+using Microsoft.AspNetCore.Mvc;
+
+// For more information on enabling MVC for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860
+
+namespace demoMvcCore.Controllers
+{
+    public class SalesController : Controller
+    {
+        // GET: /<controller>/
+        public IActionResult Index()
+        {
+            var salesVm = new SalesViewModel
+            {
+                Categories = CategoryRepository.GetCategories()
+            };
+            return View(salesVm);
+        }
+
+
+        public IActionResult SellProductPartial(int productId)
+        {
+            var product = ProductsRepository.GetProductById(productId);
+
+            return PartialView("_SellProduct", product);
+
+
+        }
+
+        public IActionResult Sell(SalesViewModel salesViewModel)
+        {
+            if(ModelState.IsValid)
+            {
+                var prod = ProductsRepository.GetProductById(salesViewModel.SelectedProductId);
+                if(prod !=null)
+                {
+                    TransactionsRepository.Add("Cashier1"
+                        , salesViewModel.SelectedProductId,
+                        prod.Name,
+                        prod.Price.HasValue ? prod.Price.Value : 0,
+                        prod.Quantity.HasValue ? prod.Quantity.Value : 0,
+                        salesViewModel.QuantityToSell);
+
+                    prod.Quantity -= salesViewModel.QuantityToSell;
+                    ProductsRepository.UpdateProduct(salesViewModel.SelectedProductId, prod);
+
+
+                }
+            }
+            var product = ProductsRepository.GetProductById(salesViewModel.SelectedProductId);
+            salesViewModel.SelectedCategoryId = (product?.CategoryId is null) ? 0 : product.CategoryId.Value;
+            salesViewModel.Categories = CategoryRepository.GetCategories();
+            return View("Index", salesViewModel);
+        }
+    }
+}
+

Controllers/TransactionsController.cs

@@ -0,0 +1,36 @@
+using demoMvcCore.Models;
+using demoMvcCore.ViewModels;
+using Microsoft.AspNetCore.Mvc;
+
+// For more information on enabling MVC for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860
+
+namespace demoMvcCore.Controllers
+{
+    public class TransactionsController : Controller
+    {
+        // GET: /<controller>/
+        public IActionResult Index()
+        {
+            TransactionsViewModel transactionsVM = new();
+
+            return View(transactionsVM);
+        }
+
+
+
+        public IActionResult Search(TransactionsViewModel transactionsViewModel)
+        {
+
+            //search
+
+            var transactions = TransactionsRepository.Search(transactionsViewModel.CashierName ?? string.Empty, transactionsViewModel.StartDate, transactionsViewModel.EndDate);
+            transactionsViewModel.Transactions = transactions;
+
+            return View("Index", transactionsViewModel);
+
+
+        }
+    }
+}
+
+

Models/CategoryRepositoruy.cs → Models/CategoryRepository.cs

@@ -13,10 +13,20 @@ public CategoryRepository()
 
 		public static void AddCategory(Category category)
 		{
-			var maxId = _categories.Max(x => x.CategoryId);
-			category.CategoryId = maxId + 1;
-			_categories.Add(category);
-		}
+			if (_categories is not null && _categories.Count > 0)
+			{
+				var maxId = _categories.Max(x => x.CategoryId);
+				category.CategoryId = maxId + 1;
+
+			}
+			else
+			{
+				var maxId = 1;
+				category.CategoryId = maxId;
+			}
+            _categories ??= new List<Category>();	
+            _categories.Add(category);
+        }
         public static Category? GetCategoryById(int categoryId) =>
             _categories.FirstOrDefault(x => x.CategoryId == categoryId);
 

Models/Product.cs

@@ -0,0 +1,28 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace demoMvcCore.Models
+{
+
+        public class Product
+        {
+            public int ProductId { get; set; }
+
+            [Required]
+            [Display(Name = "Category")]
+            public int? CategoryId { get; set; }
+
+            [Required]
+            public string Name { get; set; } = string.Empty;
+
+            [Required]
+            public int? Quantity { get; set; }
+
+            [Required]
+            [Range(0, int.MaxValue)]
+            public double? Price { get; set; }
+            public Category? Category { get; set; }
+
+
+        }
+    }
+