бизнес-логика пока не доделана, в 3 этапе не забыть про неё

School/SchoolBUsinessLogic/BusinessLogic/ItemForStudyLogic.cs

@@ -15,16 +15,18 @@ namespace SchoolBusinessLogic.BusinessLogic
 	public class ItemForStudyLogic: IItemForStudyLogic
 	{
 		private readonly ILogger _logger;
-		private readonly IItemForStudyStorage _itemforstudyStorage;
-		public ItemForStudyLogic(ILogger<ItemForStudyLogic> logger, IItemForStudyStorage itemforstudyStorage)
+		private readonly IItemForStudyStorage _itemForStudyStorage;
+		private readonly IItemStorage _itemStorage;
+		public ItemForStudyLogic(ILogger<ItemForStudyLogic> logger, IItemForStudyStorage itemForStudyStorage, IItemStorage itemStorage)
 		{
 			_logger = logger;
-			_itemforstudyStorage = itemforstudyStorage;
+			_itemForStudyStorage = itemForStudyStorage;
+			_itemStorage = itemStorage;
 		}
 		public List<ItemForStudyViewModel>? ReadList(ItemForStudySearchModel? model)
 		{
 			_logger.LogInformation("ReadList. Id: {Id}", model?.Id);
-			var list = model == null ? _itemforstudyStorage.GetFullList() : _itemforstudyStorage.GetFilteredList(model);
+			var list = model == null ? _itemForStudyStorage.GetFullList() : _itemForStudyStorage.GetFilteredList(model);
 			if (list == null)
 			{
 				_logger.LogWarning("ReadList return null list");
@@ -40,7 +42,7 @@ namespace SchoolBusinessLogic.BusinessLogic
 				throw new ArgumentNullException(nameof(model));
 			}
 			_logger.LogInformation("ReadElement. Id: {Id}", model.Id);
-			var element = _itemforstudyStorage.GetElement(model);
+			var element = _itemForStudyStorage.GetElement(model);
 			if (element == null)
 			{
 				_logger.LogWarning("ReadElement element not found");
@@ -52,7 +54,14 @@ namespace SchoolBusinessLogic.BusinessLogic
 		public bool Create(ItemForStudyBindingModel model)
 		{
 			CheckModel(model);
-			if (_itemforstudyStorage.Insert(model) == null)
+			//При добавлении привязки уменьшаем количество нужной статьи затрат
+			var item = _itemStorage.GetElement(new() { Id = model.ItemId });
+			if (_itemStorage.UpdateCount(item, -model.Count) == null)
+			{
+				_logger.LogWarning("Insert operation failed while updating count");
+				return false;
+			}
+			if (_itemForStudyStorage.Insert(model) == null)
 			{
 				_logger.LogWarning("Insert operation failed");
 				return false;
@@ -62,7 +71,21 @@ namespace SchoolBusinessLogic.BusinessLogic
 		public bool Update(ItemForStudyBindingModel model)
 		{
 			CheckModel(model);
-			if (_itemforstudyStorage.Update(model) == null)
+			//Возвращаем нужное количество старых статей затрат на склад
+			var oldItem = _itemStorage.GetElement(new() { Id = (_itemForStudyStorage.GetElement(new() { Id = model.ItemId })?.ItemId ?? -1) });
+			if (_itemStorage.UpdateCount(oldItem, model.Count) == null)
+			{
+				_logger.LogWarning("Insert operation failed while returning old intem on storage");
+				return false;
+			}
+			//Списываем новую статью затрат со склада в новом количестве
+			var newItem = _itemStorage.GetElement(new() { Id = model.ItemId });
+			if (_itemStorage.UpdateCount(newItem, -model.Count) == null)
+			{
+				_logger.LogWarning("Insert operation failed while updating count");
+				return false;
+			}
+			if (_itemForStudyStorage.Update(model) == null)
 			{
 				_logger.LogWarning("Update operation failed");
 				return false;
@@ -73,7 +96,7 @@ namespace SchoolBusinessLogic.BusinessLogic
 		{
 			CheckModel(model, false);
 			_logger.LogInformation("Delete. Id:{Id}", model.Id);
-			if (_itemforstudyStorage.Delete(model) == null)
+			if (_itemForStudyStorage.Delete(model) == null)
 			{
 				_logger.LogWarning("Delete operation failed");
 				return false;
@@ -90,6 +113,14 @@ namespace SchoolBusinessLogic.BusinessLogic
 			{
 				return;
 			}
+			//Получаем текущее число статей затрат выбранного вида на обучении
+			int currentItemOnStorage = _itemStorage.GetElement(new() { Id = model.ItemId })?.Count ?? -1;
+			//Если на складе осталось статей затрат выбранного вида меньше, чем нужно на обучение, отменяем добавление привязки
+			if (currentItemOnStorage < model.Count)
+			{
+				_logger.LogWarning("Not enough items {Id} on storage", model.ItemId);
+				throw new ArgumentException("На обучении не хватает курсов");
+			}
 			_logger.LogInformation("ItemForStudy. Id: {Id}", model.Id);
 		}
 	}

School/SchoolBUsinessLogic/BusinessLogic/ItemLogic.cs

@@ -90,6 +90,25 @@ namespace SchoolBusinessLogic.BusinessLogic
 			{
 				return;
 			}
+			//Заполнено ли название?
+			if (string.IsNullOrEmpty(model.Name))
+			{
+				_logger.LogWarning("Item name is empty");
+				throw new ArgumentException("Не введено название");
+			}
+			//Название уникально?
+			var existingItem = _itemStorage.GetElement(new() { Name = model.Name });
+			if (existingItem != null)
+			{
+				_logger.LogWarning("Item name is not unique");
+				throw new ArgumentException("Курс с таким названием уже есть");
+			}
+			//Цена больше 0?
+			if (model.Price <= 0)
+			{
+				_logger.LogWarning("Courses Price is <= 0");
+				throw new ArgumentException("Цена должна быть больше 0");
+			}
 			_logger.LogInformation("Item. Id: {Id}", model.Id);
 		}
 	}

School/SchoolContracts/StorageContracts/IItemStorage.cs

@@ -1,4 +1,5 @@
 using SchoolContracts.BindingModels;
+using SchoolContracts.Models;
 using SchoolContracts.SearchModels;
 using SchoolContracts.ViewModels;
 using System;
@@ -17,5 +18,6 @@ namespace SchoolContracts.StorageContracts
 		ItemViewModel? Insert(ItemBindingModel model);
 		ItemViewModel? Update(ItemBindingModel model);
 		ItemViewModel? Delete(ItemBindingModel model);
+		ItemViewModel? UpdateCount(IItemModel? model, int count);
 	}
 }

School/SchoolDatabase/Implements/ItemStorage.cs

@@ -89,5 +89,21 @@ namespace SchoolDatabase.Implements
 			context.SaveChanges();
 			return item.GetViewModel;
 		}
+
+		public ItemViewModel? UpdateCount(IItemModel? model, int count)
+		{
+			if (model == null)
+			{
+				return null;
+			}
+			using var context = new SchoolDbContext();
+			var item = context.Items.FirstOrDefault(x => x.Id == model.Id);
+			if (item == null)
+			{
+				return null;
+			}
+			item.UpdateCount(model, count);
+			return item.GetViewModel;
+		}
 	}
 }

School/SchoolWebApp/Program.cs

@@ -13,6 +13,18 @@ builder.Services.AddTransient<ICoursesLogic, CoursesLogic>();
 builder.Services.AddTransient<ICoursesStorage, CoursesStorage>();
 builder.Services.AddTransient<IWorkerLogic, WorkerLogic>();
 builder.Services.AddTransient<IWorkerStorage, WorkerStorage>();
+builder.Services.AddTransient<ICustomerLogic, CustomerLogic>();
+builder.Services.AddTransient<ICustumerStorage, CustumerStorage>();
+builder.Services.AddTransient<IStudyLogic, StudyLogic>();
+builder.Services.AddTransient<IStudyStorage, StudyStorage>();
+builder.Services.AddTransient<IItemLogic, ItemLogic>();
+builder.Services.AddTransient<IItemStorage, ItemStorage>();
+builder.Services.AddTransient<IItemForStudyLogic, ItemForStudyLogic>();
+builder.Services.AddTransient<IItemForStudyStorage, ItemForStudyStorage>();
+builder.Services.AddTransient<ICoursesForStudyLogic, CoursesForStudyLogic>();
+builder.Services.AddTransient<ICoursesForStudyStorage, CoursesForStudyStorage>();
+builder.Services.AddTransient<IPaymentLogic, PaymentLogic>();
+builder.Services.AddTransient<IPaymentStorage, PaymentStorage>();
 
 // Add services to the container.
 builder.Services.AddControllersWithViews();

School/SchoolWebApp/Views/Home/Attachment.cshtml

@@ -0,0 +1,14 @@
+@{
+	ViewData["Title"] = "Занятие для обучения";
+}
+<h1>ОБучение № @ViewBag.Study.Id</h1>
+
+<form method="post">
+	<div hidden><input name="id" value="@ViewBag.Study.Id" /></div>
+	@foreach (var item in ViewBag.Items)
+	{
+		<p><input type="radio" id="@item.Id" name="selecteditem" value="@item.Id">@item.Name</p>
+	}
+	<p><input name="count" type="number">Количество</p>
+	<div><center><input type="submit" value="Добавить занятие" class="btn btn-primary" /></center></div>
+</form>

School/SchoolWebApp/Views/Home/CoursesForStudy.cshtml

@@ -0,0 +1,14 @@
+<div>
+	<h1>Обучение № @ViewBag.Study.Id</h1>
+	<p>Курс @ViewBag.Study.CoursesId</p>
+	<p>Клиент @ViewBag.Study.CustumerId</p>
+	<p>Курсы:</p>
+	@if (ViewBag.CoursesForStudy.Count != 0)
+	{
+		@foreach (var courses in ViewBag.CoursesForStudy)
+		{
+			<p><div>@(courses.CoursesId + " " + courses.Count + "шт.")</div></p>
+		}
+	}
+	<div>@ViewBag.Exception</div>
+</div>

School/SchoolWebApp/Views/Home/Study.cshtml

@@ -0,0 +1,17 @@
+<div>
+	<h1>Заявка № @ViewBag.Study.Id</h1>
+	<p>Курс @ViewBag.Study.CoursesId</p>
+	<p>Клиент @ViewBag.Study.CustumerId</p>
+	<p>Затраты:</p>
+	@if (ViewBag.ItemsForStudy.Count != 0)
+	{
+		@foreach (var item in ViewBag.ItemsForStudy)
+		{
+			<p><div>@(item.ItemName + " " + item.Count + "шт.")</div></p>
+		}
+	}
+	<div>@ViewBag.Exception</div>
+	<form>
+		<a href="/Home/Attachment/@ViewBag.Study.Id" class="btn btn-primary">Добавить</a>
+	</form>
+</div>

School/SchoolWebApp/Views/Home/Studys.cshtml

@@ -0,0 +1,34 @@
+{
+	ViewData["Title"] = "Обучения на курсы";
+}
+
+<div class="text-center">
+	<h1 class="display-4">Обучения</h1>
+	@if (ViewBag.Studys.Count != 0)
+	{
+		<center>
+			<table>
+				<thead>
+					<tr>
+						<th>Дата оформления</th>
+						<th>Дата прохождения</th>
+						<th>Клиент</th>
+					</tr>
+				</thead>
+				<tbody>
+					@foreach (var study in ViewBag.Studys)
+					{
+						<tr>
+							<td>@study.DateCreated</td>
+							<td>@study.DateComplination</td>
+							<td>@study.CustomerId</td>
+							<td><a href="/Home/Study/@study.Id">Затраты</a></td>
+							<td><a href="/Home/CoursesForStudy/@study.Id">Курсы</a></td>
+						</tr>
+					}
+				</tbody>
+			</table>
+		</center>
+	}
+	<div>@ViewBag.Exception</div>
+</div>