added "Test FTP connection" button in configs

Author: maxijabase

UI/Windows/ConfigWindow.xaml

@@ -159,7 +159,7 @@
               <TextBlock Name="PreBuildBlock" IsHitTestVisible="False" HorizontalAlignment="Left" VerticalAlignment="Center"/>
               <ComboBox Name="CMD_ItemC" Width="200" HorizontalAlignment="Right" Margin="0,0,0,5"/>
             </DockPanel>
-            <TextBox Name="C_PreBuildCmd" FlowDirection="RightToLeft" Height="80" AcceptsReturn="True" VerticalScrollBarVisibility="Visible" TextChanged="C_PreBuildCmd_TextChanged" GotFocus="BuildCommandsBoxes_OnFocus" />
+            <TextBox Name="C_PreBuildCmd" Height="80" AcceptsReturn="True" VerticalScrollBarVisibility="Visible" TextChanged="C_PreBuildCmd_TextChanged" GotFocus="BuildCommandsBoxes_OnFocus" />
           </StackPanel>
 
           <StackPanel Margin="5">
@@ -183,14 +183,15 @@
             </Grid.Resources>
             <Grid Grid.Column="0">
               <StackPanel Margin="5,0,5,0">
-                <TextBlock Name="FTPHostBlock" IsHitTestVisible="False" />
-                <TextBox Name="C_FTPHost" TextChanged="C_FTPHost_TextChanged" />
-                <TextBlock Name="FTPUserBlock" IsHitTestVisible="False" />
-                <TextBox Name="C_FTPUser" TextChanged="C_FTPUser_TextChanged" />
-                <TextBlock Name="FTPPWBlock" IsHitTestVisible="False" />
-                <PasswordBox Name="C_FTPPW" PasswordChanged="C_FTPPW_TextChanged" />
-                <TextBlock Name="FTPDirBlock" IsHitTestVisible="False" />
-                <TextBox Name="C_FTPDir" TextChanged="C_FTPDir_TextChanged" />
+                <TextBlock x:Name="FTPHostBlock" IsHitTestVisible="False" />
+                <TextBox x:Name="C_FTPHost" TextChanged="C_FTPHost_TextChanged" />
+                <TextBlock x:Name="FTPUserBlock" IsHitTestVisible="False" />
+                <TextBox x:Name="C_FTPUser" TextChanged="C_FTPUser_TextChanged" />
+                <TextBlock x:Name="FTPPWBlock" IsHitTestVisible="False" />
+                <PasswordBox x:Name="C_FTPPW" PasswordChanged="C_FTPPW_TextChanged" />
+                <TextBlock x:Name="FTPDirBlock" IsHitTestVisible="False" />
+                <TextBox x:Name="C_FTPDir" TextChanged="C_FTPDir_TextChanged" />
+                <Button x:Name="FTPTestConnectionButton" Content="Test Connection" Click="FTPTestConnectionButton_Click" HorizontalAlignment="Left" Margin="0,20,0,-10"/>
               </StackPanel>
             </Grid>
             <Grid Grid.Column="1" Margin="5,0,0,0">

UI/Windows/ConfigWindow.xaml.cs

@@ -9,6 +9,7 @@
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
+using System.Windows.Threading;
 using System.Xml;
 using MahApps.Metro;
 using MahApps.Metro.Controls.Dialogs;
@@ -500,6 +501,29 @@ private void C_FTPDir_TextChanged(object sender, TextChangedEventArgs e)
             Program.Configs[ConfigListBox.SelectedIndex].FTPDir = C_FTPDir.Text;
         }
 
+        private async void FTPTestConnectionButton_Click(object sender, RoutedEventArgs e)
+        {
+            var result = await this.ShowProgressAsync("Testing the FTP connection with the provided details...", "Please wait...", settings: Program.MainWindow.MetroDialogOptions);
+            var ftp = new FTP(C_FTPHost.Text, C_FTPUser.Text, C_FTPPW.Password);
+            result.SetIndeterminate();
+            result.SetCancelable(true);
+            result.Canceled += async delegate
+            {
+                await result?.CloseAsync();
+                return;
+            };
+            if (await ftp.TestConnection())
+            {
+                await result?.CloseAsync();
+                await this.ShowMessageAsync("Success", "Connection successful!", settings: Program.MainWindow.MetroDialogOptions);
+            }
+            else
+            {
+                await result?.CloseAsync();
+                await this.ShowMessageAsync("Error", $"The connection could not be made! Message: {ftp.ErrorMessage}", settings: Program.MainWindow.MetroDialogOptions);
+            }
+        }
+
         private void C_RConIP_TextChanged(object sender, RoutedEventArgs e)
         {
             if (!AllowChange)

Utils/Models/FTP.cs

@@ -1,7 +1,9 @@
 using System;
 using System.IO;
 using System.Net;
+using System.Threading.Tasks;
 using Renci.SshNet;
+using Renci.SshNet.Common;
 
 namespace SPCode.Utils
 {
@@ -11,6 +13,8 @@ public class FTP
         private readonly string _user;
         private readonly string _pass;
 
+        public string ErrorMessage;
+
         public FTP(string host, string user, string password) { _host = host; _user = user; _pass = password; }
 
         public void Upload(string remoteFile, string localFile)
@@ -39,5 +43,55 @@ public void Upload(string remoteFile, string localFile)
                 client.UploadFile(requestUri, WebRequestMethods.Ftp.UploadFile, localFile);
             }
         }
+
+        /// <summary>
+        /// Returns whether the specified credentials in the Configs Window can be used for a valid FTP/SFTP connection.
+        /// </summary>
+        public async Task<bool> TestConnection()
+        {
+            var requestUri = new UriBuilder(_host).Uri;
+            var success = true;
+
+            if (requestUri.Scheme == "sftp")
+            {
+                var connectionInfo = new ConnectionInfo(requestUri.Host, requestUri.Port == -1 ? 22 : requestUri.Port, _user, new PasswordAuthenticationMethod(_user, _pass));
+                using var sftp = new SftpClient(connectionInfo);
+                sftp.OperationTimeout = TimeSpan.FromSeconds(5);
+                try
+                {
+                    await Task.Run(() => sftp.Connect());
+                }
+                catch (SshAuthenticationException)
+                {
+                    success = false;
+                    ErrorMessage = "Invalid credentials!";
+                }
+                catch (Exception ex)
+                {
+                    success = false;
+                    ErrorMessage = ex.Message;
+                }
+                finally
+                {
+                    sftp.Disconnect();
+                    sftp.Dispose();
+                }
+            }
+            else
+            {
+                var requestDir = WebRequest.Create(requestUri);
+                requestDir.Credentials = new NetworkCredential(_user, _pass);
+                requestDir.Timeout = 5000;
+                try
+                {
+                    var response = await requestDir.GetResponseAsync();
+                }
+                catch
+                {
+                    success = false;
+                }
+            }
+            return success;
+        }
     }
 }