IceCreamShop/IceCreamShop/MainForm.Designer.cs

@@ -40,6 +40,7 @@
             ReadyButton = new Button();
             IssuedButton = new Button();
             RefreshButton = new Button();
+            продажиToolStripMenuItem = new ToolStripMenuItem();
             menuStrip1.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)DataGridView).BeginInit();
             SuspendLayout();
@@ -50,60 +51,62 @@
             menuStrip1.Items.AddRange(new ToolStripItem[] { ToolStripMenu });
             menuStrip1.Location = new Point(0, 0);
             menuStrip1.Name = "menuStrip1";
-            menuStrip1.Padding = new Padding(6, 3, 0, 3);
-            menuStrip1.Size = new Size(1296, 30);
+            menuStrip1.Padding = new Padding(5, 2, 0, 2);
+            menuStrip1.Size = new Size(1134, 24);
             menuStrip1.TabIndex = 0;
             menuStrip1.Text = "menuStrip1";
             // 
             // ToolStripMenu
             // 
-            ToolStripMenu.DropDownItems.AddRange(new ToolStripItem[] { КомпонентыStripMenuItem, МороженноеStripMenuItem, магазиныToolStripMenuItem, поставкиToolStripMenuItem });
+            ToolStripMenu.DropDownItems.AddRange(new ToolStripItem[] { КомпонентыStripMenuItem, МороженноеStripMenuItem, магазиныToolStripMenuItem, поставкиToolStripMenuItem, продажиToolStripMenuItem });
             ToolStripMenu.Name = "ToolStripMenu";
-            ToolStripMenu.Size = new Size(117, 24);
+            ToolStripMenu.Size = new Size(94, 20);
             ToolStripMenu.Text = "Справочники";
             // 
             // КомпонентыStripMenuItem
             // 
             КомпонентыStripMenuItem.Name = "КомпонентыStripMenuItem";
-            КомпонентыStripMenuItem.Size = new Size(186, 26);
+            КомпонентыStripMenuItem.Size = new Size(180, 22);
             КомпонентыStripMenuItem.Text = "Компоненты";
             КомпонентыStripMenuItem.Click += КомпонентыStripMenuItem_Click;
             // 
             // МороженноеStripMenuItem
             // 
             МороженноеStripMenuItem.Name = "МороженноеStripMenuItem";
-            МороженноеStripMenuItem.Size = new Size(186, 26);
+            МороженноеStripMenuItem.Size = new Size(180, 22);
             МороженноеStripMenuItem.Text = "Мороженное";
             МороженноеStripMenuItem.Click += МороженноеStripMenuItem_Click;
             // 
             // магазиныToolStripMenuItem
             // 
             магазиныToolStripMenuItem.Name = "магазиныToolStripMenuItem";
-            магазиныToolStripMenuItem.Size = new Size(186, 26);
+            магазиныToolStripMenuItem.Size = new Size(180, 22);
             магазиныToolStripMenuItem.Text = "Магазины";
             магазиныToolStripMenuItem.Click += магазиныToolStripMenuItem_Click;
             // 
             // поставкиToolStripMenuItem
             // 
             поставкиToolStripMenuItem.Name = "поставкиToolStripMenuItem";
-            поставкиToolStripMenuItem.Size = new Size(186, 26);
+            поставкиToolStripMenuItem.Size = new Size(180, 22);
             поставкиToolStripMenuItem.Text = "Поставки";
             поставкиToolStripMenuItem.Click += поставкиToolStripMenuItem_Click;
             // 
             // DataGridView
             // 
             DataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
-            DataGridView.Location = new Point(11, 31);
+            DataGridView.Location = new Point(10, 23);
+            DataGridView.Margin = new Padding(3, 2, 3, 2);
             DataGridView.Name = "DataGridView";
             DataGridView.RowHeadersWidth = 51;
-            DataGridView.Size = new Size(1007, 407);
+            DataGridView.Size = new Size(881, 305);
             DataGridView.TabIndex = 1;
             // 
             // CreateOrderButton
             // 
-            CreateOrderButton.Location = new Point(1025, 31);
+            CreateOrderButton.Location = new Point(897, 23);
+            CreateOrderButton.Margin = new Padding(3, 2, 3, 2);
             CreateOrderButton.Name = "CreateOrderButton";
-            CreateOrderButton.Size = new Size(259, 29);
+            CreateOrderButton.Size = new Size(227, 22);
             CreateOrderButton.TabIndex = 2;
             CreateOrderButton.Text = "Создать заказ";
             CreateOrderButton.UseVisualStyleBackColor = true;
@@ -111,9 +114,10 @@
             // 
             // TakeInWorkButton
             // 
-            TakeInWorkButton.Location = new Point(1025, 67);
+            TakeInWorkButton.Location = new Point(897, 50);
+            TakeInWorkButton.Margin = new Padding(3, 2, 3, 2);
             TakeInWorkButton.Name = "TakeInWorkButton";
-            TakeInWorkButton.Size = new Size(259, 29);
+            TakeInWorkButton.Size = new Size(227, 22);
             TakeInWorkButton.TabIndex = 3;
             TakeInWorkButton.Text = "Отдать заказ в работу";
             TakeInWorkButton.UseVisualStyleBackColor = true;
@@ -121,9 +125,10 @@
             // 
             // ReadyButton
             // 
-            ReadyButton.Location = new Point(1025, 101);
+            ReadyButton.Location = new Point(897, 76);
+            ReadyButton.Margin = new Padding(3, 2, 3, 2);
             ReadyButton.Name = "ReadyButton";
-            ReadyButton.Size = new Size(259, 29);
+            ReadyButton.Size = new Size(227, 22);
             ReadyButton.TabIndex = 4;
             ReadyButton.Text = "Заказ готов";
             ReadyButton.UseVisualStyleBackColor = true;
@@ -131,9 +136,10 @@
             // 
             // IssuedButton
             // 
-            IssuedButton.Location = new Point(1025, 136);
+            IssuedButton.Location = new Point(897, 102);
+            IssuedButton.Margin = new Padding(3, 2, 3, 2);
             IssuedButton.Name = "IssuedButton";
-            IssuedButton.Size = new Size(259, 29);
+            IssuedButton.Size = new Size(227, 22);
             IssuedButton.TabIndex = 5;
             IssuedButton.Text = "Заказ выдан";
             IssuedButton.UseVisualStyleBackColor = true;
@@ -141,19 +147,27 @@
             // 
             // RefreshButton
             // 
-            RefreshButton.Location = new Point(1025, 171);
+            RefreshButton.Location = new Point(897, 128);
+            RefreshButton.Margin = new Padding(3, 2, 3, 2);
             RefreshButton.Name = "RefreshButton";
-            RefreshButton.Size = new Size(259, 29);
+            RefreshButton.Size = new Size(227, 22);
             RefreshButton.TabIndex = 6;
             RefreshButton.Text = "Обновить";
             RefreshButton.UseVisualStyleBackColor = true;
             RefreshButton.Click += RefreshButton_Click;
             // 
+            // продажиToolStripMenuItem
+            // 
+            продажиToolStripMenuItem.Name = "продажиToolStripMenuItem";
+            продажиToolStripMenuItem.Size = new Size(180, 22);
+            продажиToolStripMenuItem.Text = "Продажи";
+            продажиToolStripMenuItem.Click += продажиToolStripMenuItem_Click;
+            // 
             // MainForm
             // 
-            AutoScaleDimensions = new SizeF(8F, 20F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(1296, 451);
+            ClientSize = new Size(1134, 338);
             Controls.Add(RefreshButton);
             Controls.Add(IssuedButton);
             Controls.Add(ReadyButton);
@@ -162,6 +176,7 @@
             Controls.Add(DataGridView);
             Controls.Add(menuStrip1);
             MainMenuStrip = menuStrip1;
+            Margin = new Padding(3, 2, 3, 2);
             Name = "MainForm";
             Text = "Форма главная";
             Load += MainForm_Load;
@@ -186,5 +201,6 @@
         private Button RefreshButton;
         private ToolStripMenuItem магазиныToolStripMenuItem;
         private ToolStripMenuItem поставкиToolStripMenuItem;
+        private ToolStripMenuItem продажиToolStripMenuItem;
     }
 }

IceCreamShop/IceCreamShop/MainForm.cs

@@ -198,5 +198,14 @@ Program.ServiceProvider?.GetService(typeof(OrderForm));
                 form.ShowDialog();
             }
         }
+
+        private void продажиToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            var service = Program.ServiceProvider?.GetService(typeof(SellForm));
+            if (service is SellForm form)
+            {
+                form.ShowDialog();
+            }
+        }
     }
 }

IceCreamShop/IceCreamShop/Program.cs

@@ -34,8 +34,8 @@ namespace IceCreamShop
                 option.AddNLog("nlog.config");
             });
             services.AddTransient<IComponentStorage, ComponentStorage>();
-            services.AddTransient<IShopStorage, ShopStorage>();
             services.AddTransient<IShopLogic, ShopLogic>();
+            services.AddTransient<IShopStorage, ShopStorage>();
             services.AddTransient<IOrderStorage, OrderStorage>();
             services.AddTransient<IIceCreamStorage, IceCreamStorage>();
             services.AddTransient<IComponentLogic, ComponentLogic>();
@@ -51,6 +51,7 @@ namespace IceCreamShop
             services.AddTransient<ShopForm>();
             services.AddTransient<ShopsForm>();
             services.AddTransient<SupplyForm>();
+            services.AddTransient<SellForm>();
         }
     }
 }

IceCreamShop/IceCreamShop/SellForm.Designer.cs

@@ -0,0 +1,117 @@
+namespace IceCreamShop
+{
+    partial class SellForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            IceCreamComboBox = new ComboBox();
+            IceCreamLabel = new Label();
+            CountLabel = new Label();
+            CountTextBox = new TextBox();
+            SaveButton = new Button();
+            CancelButton = new Button();
+            SuspendLayout();
+            // 
+            // IceCreamComboBox
+            // 
+            IceCreamComboBox.FormattingEnabled = true;
+            IceCreamComboBox.Location = new Point(99, 12);
+            IceCreamComboBox.Name = "IceCreamComboBox";
+            IceCreamComboBox.Size = new Size(121, 23);
+            IceCreamComboBox.TabIndex = 0;
+            // 
+            // IceCreamLabel
+            // 
+            IceCreamLabel.AutoSize = true;
+            IceCreamLabel.Location = new Point(12, 20);
+            IceCreamLabel.Name = "IceCreamLabel";
+            IceCreamLabel.Size = new Size(81, 15);
+            IceCreamLabel.TabIndex = 1;
+            IceCreamLabel.Text = "Мороженное";
+            // 
+            // CountLabel
+            // 
+            CountLabel.AutoSize = true;
+            CountLabel.Location = new Point(21, 49);
+            CountLabel.Name = "CountLabel";
+            CountLabel.Size = new Size(72, 15);
+            CountLabel.TabIndex = 2;
+            CountLabel.Text = "Количество";
+            // 
+            // CountTextBox
+            // 
+            CountTextBox.Location = new Point(99, 41);
+            CountTextBox.Name = "CountTextBox";
+            CountTextBox.Size = new Size(121, 23);
+            CountTextBox.TabIndex = 3;
+            // 
+            // SaveButton
+            // 
+            SaveButton.Location = new Point(64, 73);
+            SaveButton.Name = "SaveButton";
+            SaveButton.Size = new Size(75, 23);
+            SaveButton.TabIndex = 4;
+            SaveButton.Text = "Сохранить";
+            SaveButton.UseVisualStyleBackColor = true;
+            SaveButton.Click += SaveButton_Click;
+            // 
+            // CancelButton
+            // 
+            CancelButton.Location = new Point(145, 73);
+            CancelButton.Name = "CancelButton";
+            CancelButton.Size = new Size(75, 23);
+            CancelButton.TabIndex = 5;
+            CancelButton.Text = "Отмена";
+            CancelButton.UseVisualStyleBackColor = true;
+            // 
+            // SellForm
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(224, 108);
+            Controls.Add(CancelButton);
+            Controls.Add(SaveButton);
+            Controls.Add(CountTextBox);
+            Controls.Add(CountLabel);
+            Controls.Add(IceCreamLabel);
+            Controls.Add(IceCreamComboBox);
+            Name = "SellForm";
+            Text = "Форма продажи";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private ComboBox IceCreamComboBox;
+        private Label IceCreamLabel;
+        private Label CountLabel;
+        private TextBox CountTextBox;
+        private Button SaveButton;
+        private Button CancelButton;
+    }
+}

IceCreamShop/IceCreamShop/SellForm.cs

@@ -0,0 +1,117 @@
+using IceCreamShopContracts.BusinessLogicsContracts;
+using IceCreamShopContracts.SearchModels;
+using IceCreamShopContracts.ViewModels;
+using IceCreamShopDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace IceCreamShop
+{
+    public partial class SellForm : Form
+    {
+        private readonly List<IceCreamViewModel>? _iceCreamList;
+        IShopLogic _shopLogic;
+        IIceCreamLogic _iceCreamLogic;
+        public SellForm(IIceCreamLogic iceCreamLogic, IShopLogic shopLogic)
+        {
+            InitializeComponent();
+            _shopLogic = shopLogic;
+            _iceCreamLogic = iceCreamLogic;
+            _iceCreamList = iceCreamLogic.ReadList(null);
+            if (_iceCreamList != null)
+            {
+                IceCreamComboBox.DisplayMember = "IceCreamName";
+                IceCreamComboBox.ValueMember = "Id";
+                IceCreamComboBox.DataSource = _iceCreamList;
+                IceCreamComboBox.SelectedItem = null;
+            }
+        }
+        public int IceCreamId
+        {
+            get
+            {
+                return
+       Convert.ToInt32(IceCreamComboBox.SelectedValue);
+            }
+            set
+            {
+                IceCreamComboBox.SelectedValue = value;
+            }
+        }
+
+        public IIceCreamModel? IceCreamModel
+        {
+            get
+            {
+                if (_iceCreamList == null)
+                {
+                    return null;
+                }
+                foreach (var elem in _iceCreamList)
+                {
+                    if (elem.Id == IceCreamId)
+                    {
+                        return elem;
+                    }
+                }
+                return null;
+            }
+        }
+
+
+        public int Count
+        {
+            get { return Convert.ToInt32(CountTextBox.Text); }
+            set
+            { CountTextBox.Text = value.ToString(); }
+        }
+
+        private void SaveButton_Click(object sender, EventArgs e)
+        {
+            if (string.IsNullOrEmpty(CountTextBox.Text))
+            {
+                MessageBox.Show("Заполните поле Количество", "Ошибка",
+               MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            if (IceCreamComboBox.SelectedValue == null)
+            {
+                MessageBox.Show("Выберите мороженное", "Ошибка",
+               MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+
+            try
+            {
+                int count = Convert.ToInt32(CountTextBox.Text);
+
+                bool res = _shopLogic.MakeSell(
+                    _iceCreamLogic.ReadElement(new() { Id = Convert.ToInt32(IceCreamComboBox.SelectedValue) }),
+                    count
+                );
+
+                if (!res)
+                {
+                    throw new Exception("Ошибка при продаже.");
+                }
+
+                MessageBox.Show("Продажа прошла успешно");
+                DialogResult = DialogResult.OK;
+                Close();
+
+            }
+            catch (Exception err)
+            {
+                MessageBox.Show("Ошибка продажи");
+                return;
+            }
+        }
+    }
+}

IceCreamShop/IceCreamShop/SellForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    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">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </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.Runtime.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:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <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" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </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>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

IceCreamShop/IceCreamShop/ShopForm.Designer.cs

@@ -41,66 +41,65 @@
             Название = new DataGridViewTextBoxColumn();
             Цена = new DataGridViewTextBoxColumn();
             Количество = new DataGridViewTextBoxColumn();
+            CapacityUpDown = new NumericUpDown();
+            CapacityLabel = new Label();
             ((System.ComponentModel.ISupportInitialize)DataGridView).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)CapacityUpDown).BeginInit();
             SuspendLayout();
             // 
             // DateTimePicker
             // 
-            DateTimePicker.Location = new Point(97, 93);
-            DateTimePicker.Margin = new Padding(3, 4, 3, 4);
+            DateTimePicker.Location = new Point(85, 70);
             DateTimePicker.Name = "DateTimePicker";
-            DateTimePicker.Size = new Size(363, 27);
+            DateTimePicker.Size = new Size(318, 23);
             DateTimePicker.TabIndex = 0;
             // 
             // NameTextBox
             // 
-            NameTextBox.Location = new Point(97, 16);
-            NameTextBox.Margin = new Padding(3, 4, 3, 4);
+            NameTextBox.Location = new Point(85, 12);
             NameTextBox.Name = "NameTextBox";
-            NameTextBox.Size = new Size(363, 27);
+            NameTextBox.Size = new Size(318, 23);
             NameTextBox.TabIndex = 1;
             // 
             // AddressTextBox
             // 
-            AddressTextBox.Location = new Point(97, 55);
-            AddressTextBox.Margin = new Padding(3, 4, 3, 4);
+            AddressTextBox.Location = new Point(85, 41);
             AddressTextBox.Name = "AddressTextBox";
-            AddressTextBox.Size = new Size(363, 27);
+            AddressTextBox.Size = new Size(318, 23);
             AddressTextBox.TabIndex = 2;
             // 
             // NameLabel
             // 
             NameLabel.AutoSize = true;
-            NameLabel.Location = new Point(14, 20);
+            NameLabel.Location = new Point(12, 15);
             NameLabel.Name = "NameLabel";
-            NameLabel.Size = new Size(77, 20);
+            NameLabel.Size = new Size(59, 15);
             NameLabel.TabIndex = 3;
             NameLabel.Text = "Название";
             // 
             // AdressLabel
             // 
             AdressLabel.AutoSize = true;
-            AdressLabel.Location = new Point(14, 59);
+            AdressLabel.Location = new Point(12, 44);
             AdressLabel.Name = "AdressLabel";
-            AdressLabel.Size = new Size(51, 20);
+            AdressLabel.Size = new Size(40, 15);
             AdressLabel.TabIndex = 4;
             AdressLabel.Text = "Адрес";
             // 
             // DateLabel
             // 
             DateLabel.AutoSize = true;
-            DateLabel.Location = new Point(14, 101);
+            DateLabel.Location = new Point(12, 76);
             DateLabel.Name = "DateLabel";
-            DateLabel.Size = new Size(41, 20);
+            DateLabel.Size = new Size(32, 15);
             DateLabel.TabIndex = 5;
             DateLabel.Text = "Дата";
             // 
             // SaveButton
             // 
-            SaveButton.Location = new Point(282, 340);
-            SaveButton.Margin = new Padding(3, 4, 3, 4);
+            SaveButton.Location = new Point(247, 284);
             SaveButton.Name = "SaveButton";
-            SaveButton.Size = new Size(86, 31);
+            SaveButton.Size = new Size(75, 23);
             SaveButton.TabIndex = 6;
             SaveButton.Text = "Сохранить";
             SaveButton.UseVisualStyleBackColor = true;
@@ -108,10 +107,9 @@
             // 
             // CancelButton
             // 
-            CancelButton.Location = new Point(375, 340);
-            CancelButton.Margin = new Padding(3, 4, 3, 4);
+            CancelButton.Location = new Point(328, 284);
             CancelButton.Name = "CancelButton";
-            CancelButton.Size = new Size(86, 31);
+            CancelButton.Size = new Size(75, 23);
             CancelButton.TabIndex = 7;
             CancelButton.Text = "Отмена";
             CancelButton.UseVisualStyleBackColor = true;
@@ -121,11 +119,10 @@
             // 
             DataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             DataGridView.Columns.AddRange(new DataGridViewColumn[] { Column1, Название, Цена, Количество });
-            DataGridView.Location = new Point(14, 132);
-            DataGridView.Margin = new Padding(3, 4, 3, 4);
+            DataGridView.Location = new Point(12, 128);
             DataGridView.Name = "DataGridView";
             DataGridView.RowHeadersWidth = 51;
-            DataGridView.Size = new Size(447, 200);
+            DataGridView.Size = new Size(391, 150);
             DataGridView.TabIndex = 8;
             // 
             // Column1
@@ -160,11 +157,30 @@
             Количество.ReadOnly = true;
             Количество.Width = 125;
             // 
+            // CapacityUpDown
+            // 
+            CapacityUpDown.Location = new Point(98, 99);
+            CapacityUpDown.Maximum = new decimal(new int[] { 10000, 0, 0, 0 });
+            CapacityUpDown.Name = "CapacityUpDown";
+            CapacityUpDown.Size = new Size(120, 23);
+            CapacityUpDown.TabIndex = 9;
+            // 
+            // CapacityLabel
+            // 
+            CapacityLabel.AutoSize = true;
+            CapacityLabel.Location = new Point(12, 107);
+            CapacityLabel.Name = "CapacityLabel";
+            CapacityLabel.Size = new Size(80, 15);
+            CapacityLabel.TabIndex = 10;
+            CapacityLabel.Text = "Вместимость";
+            // 
             // ShopForm
             // 
-            AutoScaleDimensions = new SizeF(8F, 20F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(470, 380);
+            ClientSize = new Size(411, 315);
+            Controls.Add(CapacityLabel);
+            Controls.Add(CapacityUpDown);
             Controls.Add(DataGridView);
             Controls.Add(CancelButton);
             Controls.Add(SaveButton);
@@ -174,11 +190,11 @@
             Controls.Add(AddressTextBox);
             Controls.Add(NameTextBox);
             Controls.Add(DateTimePicker);
-            Margin = new Padding(3, 4, 3, 4);
             Name = "ShopForm";
             Text = "Форма магазина";
             Load += ShopForm_Load;
             ((System.ComponentModel.ISupportInitialize)DataGridView).EndInit();
+            ((System.ComponentModel.ISupportInitialize)CapacityUpDown).EndInit();
             ResumeLayout(false);
             PerformLayout();
         }
@@ -198,5 +214,7 @@
         private DataGridViewTextBoxColumn Название;
         private DataGridViewTextBoxColumn Цена;
         private DataGridViewTextBoxColumn Количество;
+        private NumericUpDown CapacityUpDown;
+        private Label CapacityLabel;
     }
 }

IceCreamShop/IceCreamShop/ShopForm.cs

@@ -42,7 +42,8 @@ namespace IceCreamShop
                         NameTextBox.Text = shop.ShopName;
                         AddressTextBox.Text = shop.Address;
                         DateTimePicker.Text = shop.DateOpen.ToString();
-                        _iceCreams = shop.ShopIceCreams;
+                        CapacityUpDown.Value = shop.MaxCapacity;
+                        _iceCreams = shop.ShopIceCreams ?? new Dictionary<int, (IIceCreamModel, int)>();
                     }
                     LoadData();
                 }
@@ -103,7 +104,7 @@ namespace IceCreamShop
                     ShopName = NameTextBox.Text,
                     Address = AddressTextBox.Text,
                     DateOpen = DateTimePicker.Value.Date,
-                    ShopIceCreams = _iceCreams
+                    MaxCapacity = Convert.ToInt32(CapacityUpDown.Value),
                 };
                 var operationResult = _id.HasValue ? _logic.Update(model) : _logic.Create(model);
                 if (!operationResult)

IceCreamShop/IceCreamShopBusinessLogic/BusinessLogic/OrderLogic.cs

@@ -5,6 +5,7 @@ using IceCreamShopContracts.StoragesContracts;
 using IceCreamShopContracts.ViewModels;
 using IceCreamShopDataModels;
 using IceCreamShopDataModels.Enums;
+using IceCreamShopDataModels.Models;
 using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Generic;
@@ -18,11 +19,17 @@ namespace IceCreamShopBusinessLogic.BusinessLogic
     {
         private readonly ILogger _logger;
         private readonly IOrderStorage _orderStorage;
+        private readonly IShopStorage _shopStorage;
+        private readonly IShopLogic _shopLogic;
+        private readonly IIceCreamStorage _iceCreamStorage;
 
-        public OrderLogic(ILogger<OrderLogic> logger, IOrderStorage orderStorage)
+        public OrderLogic(IOrderStorage orderStorage, IShopStorage shopStorage, IShopLogic shopLogic, IIceCreamStorage iceCreamStorage, ILogger<OrderLogic> logger)
         {
-            _logger = logger;
             _orderStorage = orderStorage;
+            _shopStorage = shopStorage;
+            _logger = logger;
+            _shopLogic = shopLogic;
+            _iceCreamStorage = iceCreamStorage;
         }
 
         public List<OrderViewModel>? ReadList(OrderSearchModel? model)
@@ -52,6 +59,69 @@ namespace IceCreamShopBusinessLogic.BusinessLogic
             return true;
         }
 
+        public bool CheckSupply(IIceCreamModel iceCream, int count)
+        {
+            if (count <= 0)
+            {
+                _logger.LogWarning("Check then supply operation error. IceCream count < 0.");
+                return false;
+            }
+
+            int freeSpace = 0;
+            foreach (var shop in _shopStorage.GetFullList())
+            {
+                freeSpace += shop.MaxCapacity;
+                foreach (var doc in shop.ShopIceCreams)
+                {
+                    freeSpace -= doc.Value.Item2;
+                }
+            }
+
+            if (freeSpace - count < 0)
+            {
+                _logger.LogWarning("Check then supply operation error. There's no place for new IceCream in shops.");
+                return false;
+            }
+
+            foreach (var shop in _shopStorage.GetFullList())
+            {
+                freeSpace = shop.MaxCapacity;
+                foreach (var doc in shop.ShopIceCreams)
+                {
+                    freeSpace -= doc.Value.Item2;
+                }
+                if (freeSpace == 0)
+                {
+                    continue;
+                }
+                if (freeSpace - count >= 0)
+                {
+                    if (_shopLogic.MakeSupply(new() { Id = shop.Id }, iceCream, count)) 
+                        count = 0;
+                    else
+                    {
+                        _logger.LogWarning("Supply error");
+                        return false;
+                    }
+                }
+                if (freeSpace - count < 0)
+                {
+                    if (_shopLogic.MakeSupply(new() { Id = shop.Id }, iceCream, freeSpace)) 
+                        count -= freeSpace;
+                    else
+                    {
+                        _logger.LogWarning("Supply error");
+                        return false;
+                    }
+                }
+                if (count <= 0)
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
+
         public bool ChangeStatus(OrderBindingModel model, OrderStatus status)
         {
             CheckModel(model);
@@ -66,6 +136,20 @@ namespace IceCreamShopBusinessLogic.BusinessLogic
                 _logger.LogWarning("Status change operation failed");
                 throw new InvalidOperationException("Текущий статус заказа не может быть переведен в выбранный");
             }
+            if(status == OrderStatus.Готов)
+            {
+                var icecream = _iceCreamStorage.GetElement(new IceCreamSearchModel() { Id = model.IceCreamId });
+                if (icecream == null)
+                {
+                    _logger.LogWarning("Status update to " + status.ToString() + " operation failed. Document not found.");
+                    return false;
+                }
+                if (CheckSupply(icecream, model.Count) == false)
+                {
+                    _logger.LogWarning("Status update to " + status.ToString() + " operation failed. Shop supply error.");
+                    return false;
+                }
+            }
             model.Status = status;
             if (model.Status == OrderStatus.Выдан) model.DateImplement = DateTime.Now;
             _orderStorage.Update(model);

IceCreamShop/IceCreamShopBusinessLogic/BusinessLogic/ShopLogic.cs

@@ -52,25 +52,42 @@ _shopStorage.GetFilteredList(model);
             ShopViewModel curModel = _shopStorage.GetElement(model);
             if (curModel == null)
                 throw new ArgumentNullException(nameof(curModel));
-            if (curModel.ShopIceCreams.TryGetValue(iceCream.Id, out var pair))
+            var countItems = curModel.ShopIceCreams.Select(x => x.Value.Item2).Sum();
+            if (curModel.MaxCapacity - countItems >= count)
             {
-                curModel.ShopIceCreams[iceCream.Id] = (pair.Item1, pair.Item2 + count);
+                if (curModel.ShopIceCreams.TryGetValue(iceCream.Id, out var sameDocument))
+                {
+                    curModel.ShopIceCreams[iceCream.Id] = (iceCream, sameDocument.Item2 + count);
+                    _logger.LogInformation("Same iceCream found by supply. Added {0} of {1} in {2} shop", count, iceCream.IceCreamName, curModel.ShopName);
+                }
+                else
+                {
+                    curModel.ShopIceCreams[iceCream.Id] = (iceCream, count);
+                    _logger.LogInformation("New iceCream added by supply. Added {0} of {1} in {2} shop", count, iceCream.IceCreamName, curModel.ShopName);
+                }
+                _shopStorage.Update(new()
+                {
+                    Id = curModel.Id,
+                    ShopName = curModel.ShopName,
+                    Address = curModel.Address,
+                    DateOpen = curModel.DateOpen,
+                    ShopIceCreams = curModel.ShopIceCreams,
+                    MaxCapacity = curModel.MaxCapacity
+                });
             }
             else
             {
-                curModel.ShopIceCreams.Add(iceCream.Id, (iceCream, count));
+                _logger.LogWarning("Required shop is overflowed");
+                return false;
             }
-            Update(new()
-            {
-                Id = curModel.Id,
-                ShopName = curModel.ShopName,
-                DateOpen = curModel.DateOpen,
-                Address = curModel.Address,
-                ShopIceCreams = curModel.ShopIceCreams,
-            });
             return true;
         }
 
+        public bool MakeSell(IIceCreamModel iceCream, int count)
+        {
+            return _shopStorage.SellIceCreams(iceCream, count);
+        }
+
         public ShopViewModel ReadElement(ShopSearchModel model)
         {
             if (model == null)

IceCreamShop/IceCreamShopContracts/BindingModels/ShopBindingModel.cs

@@ -13,6 +13,7 @@ namespace IceCreamShopContracts.BindingModels
         public string ShopName { get; set; }
         public string Address { get; set; }
         public DateTime DateOpen { get; set; }
+        public int MaxCapacity { get; set; }
         public Dictionary<int, (IIceCreamModel, int)> ShopIceCreams { get; set; } = new();
     }
 }

IceCreamShop/IceCreamShopContracts/BusinessLogicsContracts/IShopLogic.cs

@@ -18,5 +18,6 @@ namespace IceCreamShopContracts.BusinessLogicsContracts
         bool Update(ShopBindingModel model);
         bool Delete(ShopBindingModel model);
         bool MakeSupply(ShopSearchModel model, IIceCreamModel iceCream, int count);
+        bool MakeSell(IIceCreamModel iceCream, int count);
     }
 }

IceCreamShop/IceCreamShopContracts/StoragesContracts/IShopStorage.cs

@@ -18,5 +18,6 @@ namespace IceCreamShopContracts.StoragesContracts
         ShopViewModel? Insert(ShopBindingModel model);
         ShopViewModel? Update(ShopBindingModel model);
         ShopViewModel? Delete(ShopBindingModel model);
+        public bool SellIceCreams(IIceCreamModel model, int count);
     }
 }

IceCreamShop/IceCreamShopContracts/ViewModels/ShopViewModel.cs

@@ -17,6 +17,8 @@ namespace IceCreamShopContracts.ViewModels
         public string Address { get; set; }
         [DisplayName("Дата открытия")]
         public DateTime DateOpen { get; set; }
+        [DisplayName("Вместимость")]
+        public int MaxCapacity { get; set; }
         public Dictionary<int, (IIceCreamModel, int)> ShopIceCreams { get; set; } = new();
     }
 }

IceCreamShop/IceCreamShopDataModels/IShopModel.cs

@@ -12,5 +12,6 @@ namespace IceCreamShopDataModels.Models
         string Address { get; }
         DateTime DateOpen { get; }
         Dictionary<int, (IIceCreamModel, int)> ShopIceCreams { get; }
+        int MaxCapacity { get; }
     }
 }

IceCreamShop/IceCreamShopFileImplement/DataFileSingleton.cs

@@ -14,9 +14,11 @@ namespace IceCreamShopFileImplement
         private readonly string ComponentFileName = "Component.xml";
         private readonly string OrderFileName = "Order.xml";
         private readonly string IceCreamFileName = "IceCream.xml";
+        private readonly string ShopFileName = "Shops.xml";
         public List<Component> Components { get; private set; }
         public List<Order> Orders { get; private set; }
         public List<IceCream> IceCreams { get; private set; }
+        public List<Shop> Shops { get; private set; }
 
         public static DataFileSingleton GetInstance()
         {
@@ -33,6 +35,8 @@ namespace IceCreamShopFileImplement
        "IceCreams", x => x.GetXElement);
         public void SaveOrders() => SaveData(Orders, OrderFileName,
        "Orders", x => x.GetXElement);
+        public void SaveShops() => SaveData(Shops, ShopFileName,
+       "Shops", x => x.GetXElement);
         private DataFileSingleton()
         {
             Components = LoadData(ComponentFileName, "Component", x =>
@@ -41,6 +45,8 @@ namespace IceCreamShopFileImplement
            IceCream.Create(x)!)!;
             Orders = LoadData(OrderFileName, "Order", x =>
            Order.Create(x)!)!;
+            Shops = LoadData(ShopFileName, "Shop", x =>
+           Shop.Create(x)!)!;
         }
         private static List<T>? LoadData<T>(string filename, string xmlNodeName,
        Func<XElement, T> selectFunction)

IceCreamShop/IceCreamShopFileImplement/Implements/IceCreamStorage.cs

@@ -2,6 +2,7 @@
 using IceCreamShopContracts.SearchModels;
 using IceCreamShopContracts.StoragesContracts;
 using IceCreamShopContracts.ViewModels;
+using IceCreamShopDataModels.Models;
 using IceCreamShopFileImplement.Models;
 using System;
 using System.Collections.Generic;
@@ -91,5 +92,6 @@ model)
             return null;
         }
 
+
     }
 }

IceCreamShop/IceCreamShopFileImplement/Implements/OrderStorage.cs

@@ -90,14 +90,10 @@ model)
         {
             if (model == null)
                 return null;
-            foreach (var iceCream in source.IceCreams)
-            {
-                if (iceCream.Id == model.IceCreamId)
-                {
-                    model.IceCreamName = iceCream.IceCreamName;
-                    break;
-                }
-            }
+            var iceCream = source.IceCreams.FirstOrDefault(x => (x.Id == model.IceCreamId));
+            if (iceCream == null)
+                return model;
+            model.IceCreamName = iceCream.IceCreamName;
             return model;
         }
 

IceCreamShop/IceCreamShopFileImplement/Implements/ShopStorage.cs

@@ -0,0 +1,140 @@
+using IceCreamShopContracts.BindingModels;
+using IceCreamShopContracts.SearchModels;
+using IceCreamShopContracts.StoragesContracts;
+using IceCreamShopContracts.ViewModels;
+using IceCreamShopDataModels.Models;
+using IceCreamShopFileImplement;
+using IceCreamShopFileImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace IceCreamShopFileImplement.Implements
+{
+    public class ShopStorage : IShopStorage
+    {
+        private readonly DataFileSingleton _source;
+        public ShopStorage()
+        {
+            _source = DataFileSingleton.GetInstance();
+        }
+        public List<ShopViewModel> GetFullList()
+        {
+            return _source.Shops
+ .Select(x => x.GetViewModel)
+.ToList();
+        }
+        public List<ShopViewModel> GetFilteredList(ShopSearchModel
+       model)
+        {
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                return new();
+            }
+            return _source.Shops
+ .Where(x => x.ShopName.Contains(model.Name))
+.Select(x => x.GetViewModel)
+.ToList(); ;
+        }
+        public ShopViewModel? GetElement(ShopSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return _source.Shops
+ .FirstOrDefault(x =>
+(!string.IsNullOrEmpty(model.Name) && x.ShopName ==
+model.Name) ||
+ (model.Id.HasValue && x.Id == model.Id))
+ ?.GetViewModel;
+        }
+        public ShopViewModel? Insert(ShopBindingModel model)
+        {
+            model.Id = _source.Shops.Count > 0 ? _source.Shops.Max(x =>
+x.Id) + 1 : 1;
+            var newShop = Shop.Create(model);
+            if (newShop == null)
+            {
+                return null;
+            }
+            _source.Shops.Add(newShop);
+            _source.SaveShops();
+            return newShop.GetViewModel;
+        }
+        public ShopViewModel? Update(ShopBindingModel model)
+        {
+            var component = _source.Shops.FirstOrDefault(x => x.Id ==
+model.Id);
+            if (component == null)
+            {
+                return null;
+            }
+            component.Update(model);
+            _source.SaveShops();
+            return component.GetViewModel;
+        }
+        public ShopViewModel? Delete(ShopBindingModel model)
+        {
+            var element = _source.Shops.FirstOrDefault(x => x.Id ==
+           model.Id);
+            if (element != null)
+            {
+                _source.Shops.Remove(element);
+                _source.SaveShops();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+        public bool CheckAvailability(int iceCreamId, int count)
+        {
+            int minus = _source.Shops.Select(x => x.ShopIceCreams.Select(y => (y.Value.Item1.Id == iceCreamId ? y.Value.Item2 : 0)).Sum()).Sum();
+            count -= minus;
+            return count <= 0;
+        }
+
+        public bool SellIceCreams(IIceCreamModel model, int count)
+        {
+            var iceCream = _source.IceCreams.FirstOrDefault(x => x.Id == model.Id);
+
+            if (iceCream == null || !CheckAvailability(iceCream.Id, count))
+            {
+                return false;
+            }
+
+            for (int i = 0; i < _source.Shops.Count; i++)
+            {
+                var shop = _source.Shops[i];
+                var icecreams = shop.ShopIceCreams;
+
+                foreach (var icecream in icecreams.Where(x => x.Value.Item1.Id == iceCream.Id))
+                {
+                    var min = Math.Min(icecream.Value.Item2, count);
+                    icecreams[icecream.Value.Item1.Id] = (icecream.Value.Item1, icecream.Value.Item2 - min);
+                    count -= min;
+
+                    if (count <= 0)
+                    {
+                        break;
+                    }
+                }
+
+                shop.Update(new ShopBindingModel
+                {
+                    Id = shop.Id,
+                    ShopName = shop.ShopName,
+                    Address = shop.Address,
+                    DateOpen = shop.DateOpen,
+                    MaxCapacity = shop.MaxCapacity,
+                    ShopIceCreams = icecreams
+                });
+            }
+            _source.SaveShops();
+            return true;
+        }
+
+    }
+}

IceCreamShop/IceCreamShopFileImplement/Models/Shop.cs

@@ -0,0 +1,118 @@
+using IceCreamShopContracts.BindingModels;
+using IceCreamShopContracts.ViewModels;
+using IceCreamShopDataModels.Models;
+using IceCreamShopFileImplement;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Threading.Tasks.Dataflow;
+using System.Xml.Linq;
+
+namespace IceCreamShopFileImplement.Models
+{
+    public class Shop : IShopModel
+    {
+        public int Id { get; private set; }
+        public string ShopName { get; private set; }
+        public string Address { get; private set; }
+        public DateTime DateOpen { get; private set; }
+        public Dictionary<int, int> IceCreams { get; private set; } = new();
+        private Dictionary<int, (IIceCreamModel, int)>? _shopIceCreams =
+null;
+        public Dictionary<int, (IIceCreamModel, int)> ShopIceCreams
+        {
+            get
+            {
+                if (_shopIceCreams == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _shopIceCreams = IceCreams.ToDictionary(x => x.Key, y =>
+                    ((source.IceCreams.FirstOrDefault(z => z.Id == y.Key) as IIceCreamModel)!,
+                    y.Value));
+                }
+                return _shopIceCreams;
+            }
+        }
+
+        public int MaxCapacity { get; private set; }
+
+        public static Shop? Create(ShopBindingModel model)
+        {
+            if (model == null)
+                return null;
+            return new Shop()
+            {
+                Id = model.Id,
+                ShopName = model.ShopName,
+                Address = model.Address,
+                DateOpen = model.DateOpen,
+                MaxCapacity = model.MaxCapacity,
+                IceCreams = model.ShopIceCreams.ToDictionary(x => x.Key, x => x.Value.Item2)
+            };
+        }
+
+        public static Shop? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Shop()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                ShopName = element.Element("ShopName")!.Value,
+                Address = element.Element("Address")!.Value,
+                MaxCapacity = Convert.ToInt32(element.Element("MaxCapacity")!.Value),
+                DateOpen = Convert.ToDateTime(element.Element("DateOpen")!.Value),
+                IceCreams =
+           element.Element("ShopIceCreams")!.Elements("ShopIceCream")
+            .ToDictionary(x =>
+           Convert.ToInt32(x.Element("Key")?.Value), x =>
+           Convert.ToInt32(x.Element("Value")?.Value))
+            };
+        }
+
+
+        public void Update(ShopBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ShopName = model.ShopName;
+            Address = model.Address;
+            DateOpen = model.DateOpen;
+            MaxCapacity = model.MaxCapacity;
+            if (model.ShopIceCreams.Count > 0)
+            {
+                IceCreams = model.ShopIceCreams.ToDictionary(x => x.Key, x => x.Value.Item2);
+                _shopIceCreams = null;
+            }
+        }
+
+        public ShopViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ShopName = ShopName,
+            Address = Address,
+            DateOpen = DateOpen,
+            MaxCapacity = MaxCapacity,
+            ShopIceCreams = ShopIceCreams
+        };
+
+        public XElement GetXElement => new("Shop",
+             new XAttribute("Id", Id),
+             new XElement("ShopName", ShopName),
+             new XElement("Address", Address),
+             new XElement("DateOpen", DateOpen),
+             new XElement("MaxCapacity", MaxCapacity),
+             new XElement("ShopIceCreams", IceCreams
+                 .Select(x => new XElement("ShopIceCream",
+                     new XElement("Key", x.Key),
+                     new XElement("Value", x.Value))
+                 ).ToArray()));
+    }
+}

IceCreamShop/IceCreamShopListImplement/Implements/ShopStorage.cs

@@ -106,5 +106,64 @@ namespace IceCreamShopListImplement.Implements
             return null;
         }
 
+        public bool CheckAvailability(int iceCreamId, int count)
+        {
+            foreach (var shop in _source.Shops)
+            {
+                foreach (var icecream in shop.ShopIceCreams)
+                {
+                    if (icecream.Value.Item1.Id == iceCreamId)
+                    {
+                        count -= icecream.Value.Item2;
+                    }
+                    if (count <= 0)
+                    {
+                        break;
+                    }
+                }
+            }
+
+            return count <= 0;
+        }
+
+        public bool SellIceCreams(IIceCreamModel model, int count)
+        {
+            var iceCream = _source.IceCreams.FirstOrDefault(x => x.Id == model.Id);
+
+            if (iceCream == null || !CheckAvailability(iceCream.Id, count))
+            {
+                return false;
+            }
+
+            for (int i = 0; i < _source.Shops.Count; i++)
+            {
+                var shop = _source.Shops[i];
+                var icecreams = shop.ShopIceCreams;
+
+                foreach (var icecream in icecreams.Where(x => x.Value.Item1.Id == iceCream.Id))
+                {
+                    var min = Math.Min(icecream.Value.Item2, count);
+                    icecreams[icecream.Value.Item1.Id] = (icecream.Value.Item1, icecream.Value.Item2 - min);
+                    count -= min;
+
+                    if (count <= 0)
+                    {
+                        break;
+                    }
+                }
+
+                shop.Update(new ShopBindingModel
+                {
+                    Id = shop.Id,
+                    ShopName = shop.ShopName,
+                    Address = shop.Address,
+                    DateOpen = shop.DateOpen,
+                    MaxCapacity = shop.MaxCapacity,
+                    ShopIceCreams = icecreams
+                });
+            }
+            return true;
+        }
+
     }
 }

IceCreamShop/IceCreamShopListImplement/Models/Shop.cs

@@ -16,6 +16,7 @@ namespace IceCreamShopListImplement.Models
         public string ShopName { get; private set; }
         public string Address { get; private set; }
         public DateTime DateOpen { get; private set; }
+        public int MaxCapacity { get; private set; }
         public Dictionary<int, (IIceCreamModel, int)> ShopIceCreams { get; private set; } = new();
 
         public static Shop? Create (ShopBindingModel model)