Add animated progress bar during price list download.

Show marquee while waiting for the API and determinate progress while saving rows so the UI no longer looks frozen.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/ElectronicPharmacy/HelpForms/HF_DownloadDataFromServer.Designer.cs

@@ -32,17 +32,49 @@
             this.dataGridView1 = new Elfisa.UI.Controls.ModernDataGridView();
             this.DataSetPriceList = new System.Data.DataSet();
             this.btnCloseThis = new Elfisa.UI.Controls.ModernButton();
+            this.lblTitle = new System.Windows.Forms.Label();
+            this.lblProgress = new System.Windows.Forms.Label();
+            this.progressDownload = new System.Windows.Forms.ProgressBar();
             ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.DataSetPriceList)).BeginInit();
             this.SuspendLayout();
             // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Segoe UI Semibold", 12F, System.Drawing.FontStyle.Bold);
+            this.lblTitle.Location = new System.Drawing.Point(22, 14);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(220, 28);
+            this.lblTitle.TabIndex = 5;
+            this.lblTitle.Text = "Загрузка прайс-листа";
+            // 
+            // progressDownload
+            // 
+            this.progressDownload.Location = new System.Drawing.Point(25, 52);
+            this.progressDownload.MarqueeAnimationSpeed = 30;
+            this.progressDownload.Name = "progressDownload";
+            this.progressDownload.Size = new System.Drawing.Size(630, 22);
+            this.progressDownload.Style = System.Windows.Forms.ProgressBarStyle.Marquee;
+            this.progressDownload.TabIndex = 6;
+            // 
+            // lblProgress
+            // 
+            this.lblProgress.AutoEllipsis = true;
+            this.lblProgress.Font = new System.Drawing.Font("Segoe UI", 10F);
+            this.lblProgress.Location = new System.Drawing.Point(25, 82);
+            this.lblProgress.Name = "lblProgress";
+            this.lblProgress.Size = new System.Drawing.Size(630, 24);
+            this.lblProgress.TabIndex = 7;
+            this.lblProgress.Text = "Подготовка...";
+            // 
             // rtxtDebug
             // 
             this.rtxtDebug.BackColor = System.Drawing.SystemColors.Control;
             this.rtxtDebug.BorderStyle = System.Windows.Forms.BorderStyle.None;
-            this.rtxtDebug.Location = new System.Drawing.Point(25, 12);
+            this.rtxtDebug.Location = new System.Drawing.Point(25, 116);
             this.rtxtDebug.Name = "rtxtDebug";
-            this.rtxtDebug.Size = new System.Drawing.Size(630, 319);
+            this.rtxtDebug.Size = new System.Drawing.Size(630, 215);
             this.rtxtDebug.TabIndex = 0;
             this.rtxtDebug.Text = "";
             // 
@@ -79,6 +111,9 @@
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.BackColor = System.Drawing.SystemColors.Control;
             this.ClientSize = new System.Drawing.Size(684, 396);
+            this.Controls.Add(this.lblProgress);
+            this.Controls.Add(this.progressDownload);
+            this.Controls.Add(this.lblTitle);
             this.Controls.Add(this.btnCloseThis);
             this.Controls.Add(this.dataGridView1);
             this.Controls.Add(this.rtxtDebug);
@@ -93,7 +128,7 @@
             ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.DataSetPriceList)).EndInit();
             this.ResumeLayout(false);
-
+            this.PerformLayout();
         }
 
         #endregion
@@ -102,5 +137,8 @@
         private Elfisa.UI.Controls.ModernDataGridView dataGridView1;
         private System.Data.DataSet DataSetPriceList;
         private Elfisa.UI.Controls.ModernButton btnCloseThis;
+        private System.Windows.Forms.Label lblTitle;
+        private System.Windows.Forms.Label lblProgress;
+        private System.Windows.Forms.ProgressBar progressDownload;
     }
 }

src/ElectronicPharmacy/HelpForms/HF_DownloadDataFromServer.cs

@@ -20,6 +20,7 @@ namespace Электронная_Фармация.HelpForms
         private readonly string _login = Settings.Default.stringLogin ?? string.Empty;
         private readonly string _password = Settings.Default.stringPassword ?? string.Empty;
         private readonly string _connectionStringToLocalDb = AppConfig.SqliteConnectionString;
+        private bool _isDownloading;
 
         private async void HF_DownloadDataFromServer_Load(object sender, EventArgs e)
         {
@@ -28,6 +29,8 @@ namespace Электронная_Фармация.HelpForms
             dataGridView1.Visible = false;
             rtxtDebug.Visible = true;
             rtxtDebug.ReadOnly = true;
+            _isDownloading = true;
+            SetMarqueeProgress("Подключение к серверу...");
 
             var client = new ApiClient();
             AppendStatus($"Сервер: {client.BaseUrl}");
@@ -36,40 +39,53 @@ namespace Электронная_Фармация.HelpForms
 
             try
             {
+                SetMarqueeProgress("Авторизация...");
                 await EnsureAuthenticatedAsync(client);
 
+                SetMarqueeProgress("Загрузка прайса с сервера...");
                 AppendStatus("Загружаю сводный прайс (постранично, весь)...");
                 var allSuppliersSummary = await GetFullPriceSummaryPagedAsync(client);
                 AppendStatus($"Получено {allSuppliersSummary.Summary?.Count ?? 0} позиций");
 
-                var tablePrice = BuildPriceTable(allSuppliersSummary);
+                SetMarqueeProgress("Подготовка таблицы...");
-                SavePriceTable(tablePrice);
+                var tablePrice = await Task.Run(() => BuildPriceTable(allSuppliersSummary));
 
+                SetDeterminateProgress(0, Math.Max(tablePrice.Rows.Count, 1), "Сохранение в локальную базу...");
+                var progress = new Progress<SaveProgress>(ReportSaveProgress);
+                await Task.Run(() => SavePriceTable(tablePrice, progress));
+
+                SetDeterminateProgress(100, 100, "Готово");
                 DialogResult = DialogResult.OK;
                 AppendStatus($"Готово. Сохранено {tablePrice.Rows.Count} позиций в локальную базу.");
                 ToastNotification.ShowSuccess($"Прайс обновлён: {tablePrice.Rows.Count} позиций");
             }
             catch (UnauthorizedAccessException ex)
             {
+                SetMarqueeProgress("Ошибка авторизации");
                 AppendStatus($"Ошибка авторизации: {ex.Message}");
                 AppDebugLog.Error("Download", "Ошибка авторизации при загрузке прайса", ex);
                 ToastNotification.ShowError($"Ошибка авторизации: {ex.Message}");
             }
             catch (HttpRequestException ex)
             {
+                SetMarqueeProgress("Ошибка сети");
                 AppendStatus($"Ошибка сети: {ex.Message}");
                 AppDebugLog.Error("Download", "Ошибка сети при загрузке прайса", ex);
                 ToastNotification.ShowError($"Ошибка сети: {ex.Message}");
             }
             catch (Exception ex)
             {
+                SetMarqueeProgress("Ошибка загрузки");
                 AppendStatus($"Ошибка загрузки прайса: {ex.Message}");
                 AppDebugLog.Error("Download", "Неожиданная ошибка при загрузке прайса", ex);
                 ToastNotification.ShowError($"Ошибка загрузки прайса: {ex.Message}");
             }
-
+            finally
+            {
+                _isDownloading = false;
                 btnCloseThis.Enabled = true;
             }
+        }
 
         private async Task EnsureAuthenticatedAsync(ApiClient client)
         {
@@ -118,6 +134,10 @@ namespace Электронная_Фармация.HelpForms
             for (int page = 0; page < maxPages; page++)
             {
                 int offset = page * pageSize;
+                SetMarqueeProgress(page == 0
+                    ? "Ожидание ответа сервера..."
+                    : $"Загрузка страницы {page + 1}...");
+
                 PriceSummaryResponse chunk;
                 try
                 {
@@ -126,10 +146,12 @@ namespace Электронная_Фармация.HelpForms
                 catch (UnauthorizedAccessException)
                 {
                     AppendStatus("Токен недействителен, повторная авторизация...");
+                    SetMarqueeProgress("Повторная авторизация...");
                     Settings.Default.stringToken = string.Empty;
                     Settings.Default.Save();
                     client.SetToken(null);
                     await LoginAndSaveTokenAsync(client);
+                    SetMarqueeProgress("Повторная загрузка прайса...");
                     chunk = await client.GetPriceSummaryAsync(supplierId: null, regionId: regionId, limit: pageSize, offset: offset);
                 }
 
@@ -138,6 +160,7 @@ namespace Электронная_Фармация.HelpForms
                 {
                     combined.Summary.AddRange(chunk.Summary);
                     AppendStatus($"Загружено {combined.Summary.Count} позиций...");
+                    SetMarqueeProgress($"Получено {combined.Summary.Count} позиций...");
                 }
 
                 if (got < pageSize)
@@ -215,7 +238,7 @@ namespace Электронная_Фармация.HelpForms
             return tablePrice;
         }
 
-        private void SavePriceTable(DataTable tablePrice)
+        private void SavePriceTable(DataTable tablePrice, IProgress<SaveProgress> progress = null)
         {
             const string commandToDelete = "delete from [PriceList]";
             const string commandToDeleteTempOrder = "delete from [TempOrderItems]";
@@ -253,6 +276,7 @@ VALUES
 @Dosage
 )";
 
+            int total = tablePrice.Rows.Count;
             using (var sqliteCon = new SQLiteConnection(_connectionStringToLocalDb))
             {
                 sqliteCon.Open();
@@ -266,6 +290,7 @@ VALUES
 
                 using (var transaction = sqliteCon.BeginTransaction())
                 {
+                    int saved = 0;
                     foreach (DataRow row in tablePrice.Rows)
                     {
                         using (var cmd = new SQLiteCommand(commandToInsert, sqliteCon, transaction))
@@ -286,6 +311,12 @@ VALUES
                             cmd.Parameters.AddWithValue("@Dosage", row.Table.Columns.Contains("Dosage") ? row["Dosage"] : DBNull.Value);
                             cmd.ExecuteNonQuery();
                         }
+
+                        saved++;
+                        if (progress != null && (saved % 250 == 0 || saved == total))
+                        {
+                            progress.Report(new SaveProgress(saved, total));
+                        }
                     }
 
                     transaction.Commit();
@@ -293,6 +324,65 @@ VALUES
             }
         }
 
+        private void ReportSaveProgress(SaveProgress state)
+        {
+            if (IsDisposed)
+            {
+                return;
+            }
+
+            int percent = state.Total <= 0 ? 0 : (int)(100.0 * state.Current / state.Total);
+            SetDeterminateProgress(
+                percent,
+                100,
+                $"Сохранение в базу: {state.Current} / {state.Total} ({percent}%)");
+        }
+
+        private void SetMarqueeProgress(string text)
+        {
+            if (IsDisposed)
+            {
+                return;
+            }
+
+            if (InvokeRequired)
+            {
+                BeginInvoke(new Action<string>(SetMarqueeProgress), text);
+                return;
+            }
+
+            progressDownload.Style = ProgressBarStyle.Marquee;
+            progressDownload.MarqueeAnimationSpeed = 30;
+            lblProgress.Text = text ?? string.Empty;
+            lblProgress.Refresh();
+            progressDownload.Refresh();
+        }
+
+        private void SetDeterminateProgress(int value, int maximum, string text)
+        {
+            if (IsDisposed)
+            {
+                return;
+            }
+
+            if (InvokeRequired)
+            {
+                BeginInvoke(new Action<int, int, string>(SetDeterminateProgress), value, maximum, text);
+                return;
+            }
+
+            if (progressDownload.Style != ProgressBarStyle.Continuous)
+            {
+                progressDownload.Style = ProgressBarStyle.Continuous;
+            }
+
+            progressDownload.Maximum = Math.Max(maximum, 1);
+            progressDownload.Value = Math.Max(0, Math.Min(value, progressDownload.Maximum));
+            lblProgress.Text = text ?? string.Empty;
+            lblProgress.Refresh();
+            progressDownload.Refresh();
+        }
+
         private void AppendStatus(string message)
         {
             if (InvokeRequired)
@@ -310,13 +400,27 @@ VALUES
 
         private void HF_DownloadDataFromServer_FormClosing(object sender, FormClosingEventArgs e)
         {
-            Dispose();
+            if (_isDownloading)
-            Close();
+            {
+                e.Cancel = true;
+            }
         }
 
         private void btnCloseThis_Click(object sender, EventArgs e)
         {
             Close();
         }
+
+        private sealed class SaveProgress
+        {
+            public SaveProgress(int current, int total)
+            {
+                Current = current;
+                Total = total;
+            }
+
+            public int Current { get; }
+            public int Total { get; }
+        }
     }
 }