Added transaction object, crud class and controller for transactions

.config/dotnet-tools.json

@@ -0,0 +1,12 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "dotnet-ef": {
+      "version": "8.0.4",
+      "commands": [
+        "dotnet-ef"
+      ]
+    }
+  }
+}

Controllers/ProductController.cs

@@ -1,7 +1,5 @@
-using Microsoft.AspNetCore.Mvc;
-using FirmTracker_Server.nHibernate.Products;
-using FirmTracker_Server;
-using System.Collections.Generic;
+using FirmTracker_Server.nHibernate.Products;
+using Microsoft.AspNetCore.Mvc;
 namespace FirmTracker_Server.Controllers
 {
     [Route("api/[controller]")]
@@ -16,7 +14,12 @@ namespace FirmTracker_Server.Controllers
         }
 
         // POST: api/Products
+        /// <summary>
+        /// Creates a new product.
+        /// </summary>
         [HttpPost]
+        [ProducesResponseType(200)] // Created
+        [ProducesResponseType(400)] // Bad Request
         public IActionResult CreateProduct([FromBody] Product product)
         {
             try
@@ -32,6 +35,8 @@ namespace FirmTracker_Server.Controllers
 
         // GET: api/Products/5
         [HttpGet("{id}")]
+        [ProducesResponseType(200)] // Created
+        [ProducesResponseType(400)] // Bad Request
         public IActionResult GetProduct(int id)
         {
             var product = _productCrud.GetProduct(id);
@@ -42,6 +47,8 @@ namespace FirmTracker_Server.Controllers
 
         // PUT: api/Products/5
         [HttpPut("{id}")]
+        [ProducesResponseType(200)] // Created
+        [ProducesResponseType(400)] // Bad Request
         public IActionResult UpdateProduct(int id, [FromBody] Product product)
         {
             if (id != product.Id)
@@ -60,6 +67,8 @@ namespace FirmTracker_Server.Controllers
 
         // DELETE: api/Products/5
         [HttpDelete("{id}")]
+        [ProducesResponseType(200)] // Created
+        [ProducesResponseType(400)] // Bad Request
         public IActionResult DeleteProduct(int id)
         {
             try
@@ -75,10 +84,44 @@ namespace FirmTracker_Server.Controllers
 
         // GET: api/Products
         [HttpGet]
+        [ProducesResponseType(200)] // Created
+        [ProducesResponseType(400)] // Bad Request
         public IActionResult GetAllProducts()
         {
             var products = _productCrud.GetAllProducts();
             return Ok(products);
         }
+
+        [HttpPost("CalculateTotalPrice")]
+        [ProducesResponseType(200)]
+        [ProducesResponseType(400)]
+        public IActionResult CalculateTotalPrice([FromBody] ProductOrder[] orders)
+        {
+            decimal totalPrice = 0;
+            decimal discount = 0;
+            foreach (var order in orders)
+            {
+                discount = order.Discount;
+                var product = _productCrud.GetProduct(order.ProductId);
+                if (product == null)
+                {
+                    return BadRequest($"Product with ID {order.ProductId} not found.");
+                }
+                totalPrice += product.Price * order.Quantity;
+            }
+
+            // Apply discount
+            decimal discountAmount = totalPrice * (discount / 100);
+            totalPrice -= discountAmount;
+
+            return Ok(new { TotalPrice = totalPrice });
+        }
+
+        public class ProductOrder
+        {
+            public int ProductId { get; set; }
+            public int Quantity { get; set; }
+            public decimal Discount { get; set; }   
+        }
     }
 }

Controllers/TransactionController.cs

@@ -0,0 +1,100 @@
+using Microsoft.AspNetCore.Mvc;
+using FirmTracker_Server.nHibernate.Transactions;
+using FirmTracker_Server;
+using System.Collections.Generic;
+
+
+namespace FirmTracker_Server.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class TransactionController : ControllerBase
+    {
+        private readonly TransactionCRUD _transactionCRUD;
+
+        public TransactionController()
+        {
+            _transactionCRUD = new TransactionCRUD();
+        }
+
+        // POST: api/Transaction
+        /// <summary>
+        /// Creates a new transaction.
+        /// </summary>
+        [HttpPost]
+        [ProducesResponseType(StatusCodes.Status201Created)]
+        [ProducesResponseType(StatusCodes.Status400BadRequest)]
+        public IActionResult CreateTransaction([FromBody] Transaction transaction)
+        {
+            try
+            {
+                _transactionCRUD.AddTransaction(transaction);
+                return CreatedAtAction(nameof(GetTransaction), new { id = transaction.Id }, transaction);
+            }
+            catch (Exception ex)
+            {
+                return BadRequest(ex.Message);
+            }
+        }
+
+        // GET: api/Transaction/5
+        [HttpGet("{id}")]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [ProducesResponseType(StatusCodes.Status404NotFound)]
+        public IActionResult GetTransaction(int id)
+        {
+            var transaction = _transactionCRUD.GetTransaction(id);
+            if (transaction == null)
+                return NotFound();
+            return Ok(transaction);
+        }
+
+        // PUT: api/Transaction/5
+        [HttpPut("{id}")]
+        [ProducesResponseType(StatusCodes.Status204NoContent)]
+        [ProducesResponseType(StatusCodes.Status400BadRequest)]
+        public IActionResult UpdateTransaction(int id, [FromBody] Transaction transaction)
+        {
+            if (id != transaction.Id)
+                return BadRequest("Transaction ID mismatch");
+
+            try
+            {
+                _transactionCRUD.UpdateTransaction(transaction);
+                return NoContent();
+            }
+            catch (Exception ex)
+            {
+                return BadRequest(ex.Message);
+            }
+        }
+
+        // DELETE: api/Transaction/5
+        [HttpDelete("{id}")]
+        [ProducesResponseType(StatusCodes.Status204NoContent)]
+        [ProducesResponseType(StatusCodes.Status404NotFound)]
+        public IActionResult DeleteTransaction(int id)
+        {
+            try
+            {
+                _transactionCRUD.DeleteTransaction(id);
+                return NoContent();
+            }
+            catch (Exception ex)
+            {
+                return NotFound(ex.Message);
+            }
+        }
+
+        // GET: api/Transaction
+        [HttpGet]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [ProducesResponseType(StatusCodes.Status400BadRequest)]
+        public IActionResult GetAllTransactions()
+        {
+            var transactions = _transactionCRUD.GetAllTransactions();
+            return Ok(transactions);
+        }
+
+    }
+}

FirmTracker-Server.csproj

@@ -5,8 +5,13 @@
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <RootNamespace>FirmTracker_Server</RootNamespace>
+    <UserSecretsId>08986e21-848b-485a-a219-03e2dc6041e4</UserSecretsId>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Content Include="Properties\launchSettings.json" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="FluentNHibernate" Version="3.3.0" />
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="7.0.18" />
@@ -16,4 +21,31 @@
     <PackageReference Include="System.Data.SqlClient" Version="4.8.6" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Compile Update="Properties\Resources.Designer.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Update="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Update="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="Properties\launchSettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>

Program.cs

@@ -4,33 +4,71 @@ using NHibernate.Dialect;
 using NHibernate.Driver;
 using FirmTracker_Server.Controllers;
 using FirmTracker_Server.nHibernate.Products;
+using FirmTracker_Server.nHibernate;
 
 namespace FirmTracker_Server
 {
     public class Program
     {
+
         public static void Main(string[] args)
         {
             var builder = WebApplication.CreateBuilder(args);
+            string appDirectory = Directory.GetCurrentDirectory();        
+            string configFilePath = Path.Combine(appDirectory, "appsettings.json");
+            string connectionString = "";
+            if (File.Exists(configFilePath))
+            {
+                var config = new ConfigurationBuilder()
+                  .AddJsonFile(configFilePath)
+                  .Build();
+
+                var connectionstringsection = config.GetSection("AppSettings:ConnectionString");
+
+                connectionString = connectionstringsection.Value;
+
+                SessionFactory.Init(connectionString);
+            }
+            else
+            {
+                Console.WriteLine($"The configuration file '{configFilePath}' was not found.");
+            }
 
-            // Add services to the container.
             TestClass test = new TestClass();
             test.AddTestProduct();
             builder.Services.AddControllers();
-            // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+
             builder.Services.AddEndpointsApiExplorer();
             builder.Services.AddSwaggerGen();
 
             var app = builder.Build();
+            var configSwagger = new ConfigurationBuilder()
+              .SetBasePath(Directory.GetCurrentDirectory())
+              .AddJsonFile("appsettings.json")
+              .Build();
 
-            // Configure the HTTP request pipeline.
-            if (app.Environment.IsDevelopment())
+       
+            var port = configSwagger.GetValue<int>("Port", 5075); 
+            var port2 = configSwagger.GetValue<int>("Port", 7039);
+            app.Urls.Add($"http://*:{port}");  
+            app.Urls.Add($"https://*:{port2}");
+         
+            try
             {
                 app.UseSwagger();
-                app.UseSwaggerUI();
+                app.UseSwaggerUI(c =>
+                {
+                    c.SwaggerEndpoint($"/swagger/v1/swagger.json", "FirmTracker - TEST"); 
+                    c.RoutePrefix = "swagger";
+                });
+                Console.WriteLine("uruchomiono swaggera");
+                app.UseHttpsRedirection();
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Nie uda³o siê uruchomiæ swaggera");
             }
 
-            app.UseHttpsRedirection();
 
             app.UseAuthorization();
 
@@ -38,9 +76,9 @@ namespace FirmTracker_Server
             app.MapControllers();
 
             var configuration = new Configuration();
-           
+
 
             app.Run();
         }
     }
-}
+}

Properties/Resources.Designer.cs

@@ -0,0 +1,63 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace FirmTracker_Server.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("FirmTracker_Server.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+    }
+}

Properties/Resources.resx

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+	<!-- 
+		Microsoft ResX Schema
+
+		Version 1.3
+
+		The primary goals of this format is to allow a simple XML format 
+		that is mostly human readable. The generation and parsing of the 
+		various data types are done through the TypeConverter classes 
+		associated with the data types.
+
+		Example:
+
+		... ado.net/XML headers & schema ...
+		<resheader name="resmimetype">text/microsoft-resx</resheader>
+		<resheader name="version">1.3</resheader>
+		<resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+		<resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+		<data name="Name1">this is my long string</data>
+		<data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+		<data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+			[base64 mime encoded serialized .NET Framework object]
+		</data>
+		<data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+			[base64 mime encoded string representing a byte array form of the .NET Framework object]
+		</data>
+
+		There are any number of "resheader" rows that contain simple 
+		name/value pairs.
+
+		Each data row contains a name, and value. The row also contains a 
+		type or mimetype. Type corresponds to a .NET class that support 
+		text/value conversion through the TypeConverter architecture. 
+		Classes that don't support this are serialized and stored with the 
+		mimetype set.
+
+		The mimetype is used for serialized objects, and tells the 
+		ResXResourceReader how to depersist the object. This is currently not 
+		extensible. For a given mimetype the value must be set accordingly:
+
+		Note - application/x-microsoft.net.object.binary.base64 is the format 
+		that the ResXResourceWriter will generate, however the reader can 
+		read any of the formats listed below.
+
+		mimetype: application/x-microsoft.net.object.binary.base64
+		value   : The object must be serialized with 
+			: System.Serialization.Formatters.Binary.BinaryFormatter
+			: and then encoded with base64 encoding.
+
+		mimetype: application/x-microsoft.net.object.soap.base64
+		value   : The object must be serialized with 
+			: System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+			: and then encoded with base64 encoding.
+
+		mimetype: application/x-microsoft.net.object.bytearray.base64
+		value   : The object must be serialized into a byte array 
+			: using a System.ComponentModel.TypeConverter
+			: and then encoded with base64 encoding.
+	-->
+	
+	<xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+		<xsd:element name="root" msdata:IsDataSet="true">
+			<xsd:complexType>
+				<xsd:choice maxOccurs="unbounded">
+					<xsd:element name="data">
+						<xsd:complexType>
+							<xsd:sequence>
+								<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+								<xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+							</xsd:sequence>
+							<xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+							<xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+							<xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+						</xsd:complexType>
+					</xsd:element>
+					<xsd:element name="resheader">
+						<xsd:complexType>
+							<xsd:sequence>
+								<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+							</xsd:sequence>
+							<xsd:attribute name="name" type="xsd:string" use="required" />
+						</xsd:complexType>
+					</xsd:element>
+				</xsd:choice>
+			</xsd:complexType>
+		</xsd:element>
+	</xsd:schema>
+	<resheader name="resmimetype">
+		<value>text/microsoft-resx</value>
+	</resheader>
+	<resheader name="version">
+		<value>1.3</value>
+	</resheader>
+	<resheader name="reader">
+		<value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.3500.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+	</resheader>
+	<resheader name="writer">
+		<value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.3500.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+	</resheader>
+</root>

Properties/launchSettings.json

@@ -1,4 +1,34 @@
-{
+{
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Production"
+      },
+      "dotnetRunMessages": true,
+      "applicationUrl": "http://localhost:5045"
+    },
+    "https": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Production"
+      },
+      "dotnetRunMessages": true,
+      "applicationUrl": "https://localhost:7039;http://localhost:5045"
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Production"
+      }
+    }
+  },
   "$schema": "https://json.schemastore.org/launchsettings.json",
   "iisSettings": {
     "windowsAuthentication": false,
@@ -7,35 +37,5 @@
       "applicationUrl": "http://localhost:17940",
       "sslPort": 44326
     }
-  },
-  "profiles": {
-    "http": {
-      "commandName": "Project",
-      "dotnetRunMessages": true,
-      "launchBrowser": true,
-      "launchUrl": "swagger",
-      "applicationUrl": "http://localhost:5045",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    },
-    "https": {
-      "commandName": "Project",
-      "dotnetRunMessages": true,
-      "launchBrowser": true,
-      "launchUrl": "swagger",
-      "applicationUrl": "https://localhost:7039;http://localhost:5045",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    },
-    "IIS Express": {
-      "commandName": "IISExpress",
-      "launchBrowser": true,
-      "launchUrl": "swagger",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    }
   }
-}
+}

TestClass.cs

@@ -1,4 +1,5 @@
-using FirmTracker_Server.nHibernate; 
+using FirmTracker_Server.Controllers;
+using FirmTracker_Server.nHibernate; 
 using FirmTracker_Server.nHibernate.Products;
 using NHibernate;
 
@@ -8,21 +9,41 @@ namespace FirmTracker_Server
     {
         public void AddTestProduct()
         {
-            SessionFactory.Init("Server=localhost;Database=FirmTrackerDB;User Id=sa;Password=Rap45tro2;");
+           // SessionFactory.Init(ConnectionString);
 
             var product = new nHibernate.Products.Product
             {
-                Name = "Test Product2",
-                Description = "This is a test product",
-                Price = 11.99m,
-                Type = 0, // Goods
-                Availability = true
+                Name = "Produkt 1",
+                Description = "testowy produkt",
+                Price = 11.50m,
+                Type = 1, 
+                Availability = 5
+            };
+            var product2 = new nHibernate.Products.Product
+            {
+                Name = "Usluga 1",
+                Description = "testowa usluga",
+                Price = 1120.00m,
+                Type = 0,
+                Availability = 0
+            };
+            var transaction1 = new nHibernate.Transactions.Transaction
+            {
+                Date = DateTime.Now,
+                Description = "testowa transakcja",
+                Discount = 10,
+                EmployeeId = 1,
+                PaymentType = "Karta kredytowa",
+                Products = new List<Product> { product, product2 }
             };
 
             try
             {
                 FirmTracker_Server.nHibernate.Products.ProductCRUD crud = new ProductCRUD();
+                FirmTracker_Server.nHibernate.Transactions.TransactionCRUD transactionCrud = new nHibernate.Transactions.TransactionCRUD();
                 crud.AddProduct(product);
+                crud.AddProduct(product2);
+                transactionCrud.AddTransaction(transaction1);
             }
             catch(Exception ex)
             {

appsettings.json

@@ -1,9 +1,29 @@
 {
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
+  "AppSettings": {
+    "ConnectionString": "Server=localhost;Database=FirmTrackerDB;User Id=sa;Password=Rap45tro2;",
   },
-  "AllowedHosts": "*"
-}
+    "profiles": {
+      "http": {
+        "commandName": "Project",
+        "dotnetRunMessages": true,
+        "launchBrowser": true,
+        "launchUrl": "swagger",
+        "applicationUrl": "http://localhost:5045"
+     
+      },
+      "https": {
+        "commandName": "Project",
+        "dotnetRunMessages": true,
+        "launchBrowser": true,
+        "launchUrl": "swagger",
+        "applicationUrl": "https://localhost:7039"
+   
+      },
+      "IIS Express": {
+        "commandName": "IISExpress",
+        "launchBrowser": true,
+        "launchUrl": "swagger"
+ 
+      }
+    }
+}

nHIbernate/Products/Product.cs

@@ -1,4 +1,6 @@
-namespace FirmTracker_Server.nHibernate.Products
+using System.Text.Json.Serialization;
+
+namespace FirmTracker_Server.nHibernate.Products
 {
     public class Product
     {
@@ -7,6 +9,6 @@
         public virtual string Description { get; set; }
         public virtual decimal Price { get; set; }
         public virtual int Type { get; set; } // 0 for service, 1 for goods
-        public virtual bool Availability { get; set; }
+        public virtual int Availability { get; set; }
     }
 }

nHIbernate/SessionFactory.cs

@@ -25,7 +25,12 @@ namespace FirmTracker_Server.nHibernate
                 .Database(MsSqlConfiguration.MsSql2012
         .ConnectionString(c => c.Is(connectionString))
         .ShowSql())
-                .Mappings(m => m.FluentMappings.AddFromAssemblyOf<Products.ProductMapping>())
+                .Mappings(m =>
+                {
+                    m.FluentMappings
+                    .AddFromAssemblyOf<Products.ProductMapping>()
+                    .AddFromAssemblyOf<Transactions.TransactionMapping>();           
+                })
                 .ExposeConfiguration(cfg => new SchemaExport(cfg).Create(true, true))  //SchemaUpdate . Execute  dla only update
                 .BuildSessionFactory();
         }

nHibernate/Transactions/Transaction.cs

@@ -0,0 +1,21 @@
+using FirmTracker_Server.nHibernate.Products;
+using System.Text.Json.Serialization;
+
+namespace FirmTracker_Server.nHibernate.Transactions
+{
+    public class Transaction
+    {
+        public virtual int Id { get; set; }
+        public virtual DateTime Date { get; set; }  
+        public virtual int EmployeeId { get; set; }
+        public virtual IList<Product> Products { get; set; } = new List<Product>();
+        public virtual string PaymentType { get; set; }
+        public virtual int Discount { get; set; }
+        public virtual string Description { get; set; }
+
+        public Transaction()
+        {
+            Products = new List<Product>();
+        }
+    }
+}

nHibernate/Transactions/TransactionCRUD.cs

@@ -0,0 +1,95 @@
+using FirmTracker_Server.nHibernate;
+using FirmTracker_Server.nHibernate.Products;
+using NHibernate;
+using System.Collections.Generic;
+using Microsoft.AspNetCore.OpenApi;
+using Microsoft.AspNetCore.Http.HttpResults;
+using FirmTracker_Server.nHibernate.Transactions;
+using NHibernate.Linq;
+
+namespace FirmTracker_Server.nHibernate.Transactions
+{
+    public class TransactionCRUD
+    {
+        public void AddTransaction(Transaction transaction)
+        {
+            using (var session = SessionFactory.OpenSession())
+            using (var sessionTransaction = session.BeginTransaction())
+            {
+                try
+                {
+                    session.Save(transaction);
+                    sessionTransaction.Commit();
+                }
+                catch
+                {
+                    sessionTransaction.Rollback();
+                    throw;
+                }
+            }
+        }
+
+        public Transaction GetTransaction(int transactionId)
+        {
+            using (var session = SessionFactory.OpenSession())
+            {
+                var transaction = session.Query<Transaction>()
+                    .Fetch(t => t.Products)
+                    .FirstOrDefault(t => t.Id == transactionId);
+                return transaction;
+            }
+        }
+
+        public void UpdateTransaction(Transaction transaction)
+        {
+            using (var session = SessionFactory.OpenSession())
+            using (var t = session.BeginTransaction())
+            {
+                try
+                {
+                    session.Update(transaction);
+                    t.Commit();
+                }
+                catch
+                {
+                    t.Rollback();
+                    throw;
+                }
+            }
+        }
+
+        public void DeleteTransaction(int transactionId)
+        {
+            using (var session = SessionFactory.OpenSession())
+            using (var t = session.BeginTransaction())
+            {
+                try
+                {
+                    var transaction = session.Get<Product>(transactionId);
+                    if (transaction != null)
+                    {
+                        session.Delete(transaction);
+                        t.Commit();
+                    }
+                }
+                catch
+                {
+                    t.Rollback();
+                    throw;
+                }
+            }
+        }
+
+        public IList<Transaction> GetAllTransactions()
+        {
+            using (var session = SessionFactory.OpenSession())
+            {
+                var transactions = session.Query<Transaction>()
+                    .FetchMany(t => t.Products)
+                    .ToList();
+                return transactions;
+            }
+        }
+    }
+
+}

nHibernate/Transactions/TransactionMapping.cs

@@ -0,0 +1,24 @@
+using FluentNHibernate.Mapping;
+
+namespace FirmTracker_Server.nHibernate.Transactions
+{
+    public class TransactionMapping:ClassMap<Transaction>
+    {
+        public TransactionMapping()
+        {
+            Table("Transactions");
+            Id(x => x.Id).GeneratedBy.Identity();
+            Map(x => x.Date);
+            Map(x => x.EmployeeId);
+            Map(x => x.PaymentType);
+            Map(x => x.Discount);
+            Map(x => x.Description);
+
+            HasManyToMany(x => x.Products)
+                .Table("TransactionProducts") 
+                .ParentKeyColumn("TransactionId")
+                .ChildKeyColumn("ProductId")
+                .Cascade.All();
+        }
+    }
+}