Merge branch 'issue-8075-display-database-size' into develop

# Conflicts:
#	src/Presentation/Nop.Web.Framework/Migrations/UpgradeTo500/LocalizationMigration.cs

Author: skoshelev

src/Libraries/Nop.Data/DataProviders/MsSqlDataProvider.cs

@@ -261,6 +261,21 @@ public virtual async Task ShrinkDatabaseAsync()
         await currentConnection.ExecuteAsync($"DBCC SHRINKDATABASE ([{GetConnectionStringBuilder().InitialCatalog}]);");
     }
 
+    /// <summary>
+    /// Gets the database size in Kb
+    /// </summary>
+    /// <returns>
+    /// A task that represents the asynchronous operation
+    /// The task result contains the database size
+    /// </returns>
+    public virtual async Task<long> GetDatabaseSizeAsync()
+    {
+        using var currentConnection = CreateDataConnection();
+        var result = await currentConnection.QueryToListAsync<long>("SELECT dbSize = SUM(size) * 8 FROM sys.master_files WITH(NOWAIT) WHERE database_id = DB_ID() GROUP BY database_id;");
+
+        return result.FirstOrDefault();
+    }
+
     /// <summary>
     /// Build the connection string
     /// </summary>

src/Libraries/Nop.Data/DataProviders/MySqlDataProvider.cs

@@ -264,6 +264,21 @@ public virtual Task ShrinkDatabaseAsync()
         throw new DataException("This database provider does not support database shrinking.  Instead, use Re-index operation to optimize database space. Optimization is only available when the 'innodb_file_per_table' setting is enabled");
     }
 
+    /// <summary>
+    /// Gets the database size in Kb
+    /// </summary>
+    /// <returns>
+    /// A task that represents the asynchronous operation
+    /// The task result contains the database size
+    /// </returns>
+    public virtual async Task<long> GetDatabaseSizeAsync()
+    {
+        using var currentConnection = CreateDataConnection();
+        var result = await currentConnection.QueryToListAsync<long>($"SELECT ROUND(SUM(data_length + index_length) / 1024, 1) FROM information_schema.tables where table_schema='{GetConnectionStringBuilder().Database}' GROUP BY table_schema");
+
+        return result.FirstOrDefault();
+    }
+
     /// <summary>
     /// Build the connection string
     /// </summary>

src/Libraries/Nop.Data/DataProviders/PostgreSqlDataProvider.cs

@@ -344,6 +344,21 @@ public virtual async Task ShrinkDatabaseAsync()
             await currentConnection.ExecuteAsync($"VACUUM FULL \"{table}\";");
     }
 
+    /// <summary>
+    /// Gets the database size in Kb
+    /// </summary>
+    /// <returns>
+    /// A task that represents the asynchronous operation
+    /// The task result contains the database size
+    /// </returns>
+    public virtual async Task<long> GetDatabaseSizeAsync()
+    {
+        using var currentConnection = CreateDataConnection();
+        var result = await currentConnection.QueryToListAsync<long>($"SELECT pg_database_size('{GetConnectionStringBuilder().Database}') / 1024 as sizebytes");
+
+        return result.FirstOrDefault();
+    }
+
     /// <summary>
     /// Build the connection string
     /// </summary>

src/Libraries/Nop.Data/INopDataProvider.cs

@@ -232,6 +232,15 @@ Task<ITempDataStorage<TItem>> CreateTempDataStorageAsync<TItem>(string storeKey,
     /// <returns>A task that represents the asynchronous operation</returns>
     Task ShrinkDatabaseAsync();
 
+    /// <summary>
+    /// Gets the database size in Kb
+    /// </summary>
+    /// <returns>
+    /// A task that represents the asynchronous operation
+    /// The task result contains the database size
+    /// </returns>
+    Task<long> GetDatabaseSizeAsync();
+
     /// <summary>
     /// Build the connection string
     /// </summary>

src/Presentation/Nop.Web.Framework/Migrations/UpgradeTo500/LocalizationMigration.cs

@@ -248,6 +248,9 @@ public override void Up()
             //#8074
             ["Admin.System.SystemInfo.UsedMemory"] = "Used memory (MB)",
             ["Admin.System.SystemInfo.UsedMemory.Hint"] = "Total megabytes (MB) in use by the application.",
+            
+            //#8075
+            ["Admin.System.Maintenance.ShrinkDatabase.DatabaseSize"] = "Current database size is {0} MB",
         });
 
         #endregion

src/Presentation/Nop.Web/App_Data/Localization/defaultResources.nopres.xml

@@ -16046,11 +16046,14 @@
   <LocaleResource Name="Admin.System.Maintenance.ShrinkDatabase.Complete">
     <Value>Database shrinking completed</Value>
   </LocaleResource>
+  <LocaleResource Name="Admin.System.Maintenance.ShrinkDatabase.DatabaseSize">
+    <Value>Current database size is {0} MB</Value>
+  </LocaleResource>    
   <LocaleResource Name="Admin.System.Maintenance.ShrinkDatabase.Progress">
     <Value>Processing...</Value>
   </LocaleResource>
   <LocaleResource Name="Admin.System.Maintenance.ShrinkDatabase.Text">
-    <Value>Reclaim disk space by reorganizing physical data storage</Value>
+    <Value>Reclaim disk space by reorganizing physical data storage.</Value>
   </LocaleResource>
   <LocaleResource Name="Admin.System.QueuedEmails">
     <Value>Message queue</Value>

src/Presentation/Nop.Web/Areas/Admin/Controllers/CommonController.cs

@@ -280,6 +280,9 @@ public virtual async Task<IActionResult> ReIndexTables(MaintenanceModel model)
             await _notificationService.ErrorNotificationAsync(exc);
         }
 
+        //prepare model
+        model = await _commonModelFactory.PrepareMaintenanceModelAsync(model);
+
         return View(model);
     }
 
@@ -298,6 +301,9 @@ public virtual async Task<IActionResult> ShrinkDatabase(MaintenanceModel model)
             await _notificationService.ErrorNotificationAsync(exc);
         }
 
+        //prepare model
+        model = await _commonModelFactory.PrepareMaintenanceModelAsync(model);
+
         return View(model);
     }
 

src/Presentation/Nop.Web/Areas/Admin/Factories/CommonModelFactory.cs

@@ -982,6 +982,10 @@ public virtual async Task<MaintenanceModel> PrepareMaintenanceModelAsync(Mainten
         model.DeleteAlreadySentQueuedEmails.EndDate = DateTime.UtcNow.AddDays(-7);
 
         model.BackupSupported = _dataProvider.BackupSupported;
+        model.DatabaseSize =
+            string.Format(
+                await _localizationService.GetResourceAsync("Admin.System.Maintenance.ShrinkDatabase.DatabaseSize"),
+                Math.Round(await _dataProvider.GetDatabaseSizeAsync() / 1024.0M, 2));
 
         //prepare nested search model
         PrepareBackupFileSearchModel(model.BackupFileSearchModel);

src/Presentation/Nop.Web/Areas/Admin/Models/Common/MaintenanceModel.cs

@@ -33,6 +33,8 @@ public MaintenanceModel()
 
     public bool BackupSupported { get; set; }
 
+    public string DatabaseSize { get; set; }
+
     #region Nested classes
 
     public partial record DeleteGuestsModel : BaseNopModel

src/Presentation/Nop.Web/Areas/Admin/Views/Common/_Maintenance.ShrinkDatabase.cshtml

@@ -6,6 +6,12 @@
                 <p>
                     @T("Admin.System.Maintenance.ShrinkDatabase.Text")
                 </p>
+                <p>
+                    <ul>
+                        <input type="hidden" asp-for="DatabaseSize" />
+                        <li>@Html.Raw(Model.DatabaseSize)</li>
+                    </ul>
+                </p>
             </div>
             <div>
                 <button type="submit" name="shrink-database" class="btn btn-default">