Add form validation

PotatoNV-next/Controls/NVForm.xaml

@@ -0,0 +1,36 @@
+<UserControl x:Class="PotatoNV_next.Controls.NVForm"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             xmlns:local="clr-namespace:PotatoNV_next.Controls"
+             mc:Ignorable="d" 
+             d:DesignHeight="450" d:DesignWidth="800">
+    <StackPanel Style="{x:Null}">
+        <StackPanel>
+            <Label Content="Target device" />
+            <ComboBox Name="deviceList" />
+        </StackPanel>
+        <StackPanel>
+            <Label Content="Bootloader" />
+            <ComboBox Name="deviceBootloader" />
+        </StackPanel>
+        <StackPanel>
+            <Label Content="Serial number (optional)" />
+            <TextBox x:Name="nvSerialNumber" />
+        </StackPanel>
+        <StackPanel>
+            <Label Content="Board ID (optional)" />
+            <TextBox x:Name="nvBidNumber" />
+        </StackPanel>
+        <StackPanel>
+            <Label Content="Unlock code" />
+            <TextBox x:Name="nvUnlockCode" />
+        </StackPanel>
+
+        <StackPanel>
+            <CheckBox x:Name="disableFBLOCK" Content="Disable FBLOCK" IsChecked="True" />
+            <Button x:Name="startButton" Content="Start!" Height="40" Margin="0,10,0,0" Click="StartButton_Click" />
+        </StackPanel>
+    </StackPanel>
+</UserControl>

PotatoNV-next/Controls/NVForm.xaml.cs

@@ -0,0 +1,107 @@
+using PotatoNV_next.Utils;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace PotatoNV_next.Controls
+{
+    public partial class NVForm : UserControl
+    {
+        private UsbController usbController;
+        private Regex nvRegex = new Regex("^[a-zA-Z0-9]{16}$");
+
+        public NVForm()
+        {
+            InitializeComponent();
+
+            usbController = new UsbController();
+            usbController.AddListener(HandleDevices);
+            usbController.StartWorker();
+        }
+
+        private void Assert(bool result, string message)
+        {
+            if (result)
+            {
+                return;
+            }
+
+            Log.Debug("Form check failed");
+            Log.Error(message);
+            MessageBox.Show(message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+
+            throw new Exception(message);
+        }
+
+        private void HandleDevices(UsbController.Device[] devices)
+        {
+            if (!Dispatcher.CheckAccess())
+            {
+                Dispatcher.Invoke(() => HandleDevices(devices));
+                return;
+            }
+
+            deviceList.Items.Clear();
+
+            foreach (var device in devices)
+            {
+                deviceList.Items.Add(device.Mode == UsbController.Device.DMode.DownloadVCOM
+                    ? device.Description
+                    : $"Fastboot: {device.Description}");
+
+                Log.Debug($"{device.Mode} mode: {device.Description}");
+            }
+
+            if (deviceList.SelectedIndex == -1 && devices.Length > 0)
+            {
+                deviceList.SelectedIndex = 0;
+            }
+        }
+
+        private bool VerifyNVValue(string value, bool required = false)
+        {
+            if (value == string.Empty && !required)
+            {
+                return true;
+            }
+
+            return nvRegex.IsMatch(value);
+        }
+        
+        private void StartButton_Click(object sender, RoutedEventArgs e)
+        {
+            try
+            {
+                Assert(deviceList.SelectedIndex != -1, "No connected devices!\n\r" +
+                        "Check connection and required drivers.");
+
+                Assert(deviceBootloader.SelectedIndex != -1, "Couldn't find any valid bootloader!");
+
+                Assert(VerifyNVValue(nvSerialNumber.Text), "Serial number is not valid.");
+
+                Assert(VerifyNVValue(nvBidNumber.Text), "BoardID is not valid.");
+
+                Assert(VerifyNVValue(nvUnlockCode.Text, true), "Unlock code is not valid.");
+            }
+            catch
+            {
+                return;
+            }
+
+            Log.Success("Form is valid, starting");
+        }
+    }
+}

PotatoNV-next/MainWindow.xaml

@@ -30,32 +30,7 @@
     <UniformGrid Columns="2">
         <TabControl Margin="3">
             <TabItem Header="NVME Update">
-                <StackPanel Style="{x:Null}">
-                    <StackPanel>
-                        <Label Content="Target device" />
-                        <ComboBox Name="deviceList" />
-                    </StackPanel>
-                    <StackPanel>
-                        <Label Content="Bootloader" />
-                        <ComboBox Name="deviceBootloader" />
-                    </StackPanel>
-                    <StackPanel>
-                        <Label Content="Serial number (optional)" />
-                        <TextBox x:Name="nvSerialNumber" />
-                    </StackPanel>
-                    <StackPanel>
-                        <Label Content="Board ID (optional)" />
-                        <TextBox x:Name="bidNumber" />
-                    </StackPanel>
-                    <StackPanel>
-                        <Label Content="Unlock code" />
-                        <TextBox x:Name="unlockCode" />
-                    </StackPanel>
-                    <StackPanel>
-                        <CheckBox x:Name="disableFBLOCK" Content="Disable FBLOCK" IsChecked="True" />
-                        <Button Content="Start!" Height="40" Margin="0,10,0,0" />
-                    </StackPanel>
-                </StackPanel>
+                <controls:NVForm />
             </TabItem>
             <TabItem Header="About program">
                 <controls:AboutTab />

PotatoNV-next/MainWindow.xaml.cs

@@ -19,22 +19,11 @@ namespace PotatoNV_next
 {
     public partial class MainWindow : Window
     {
-        private UsbController usbController = new UsbController();
 
         public MainWindow()
         {
             Icon = MediaConverter.ImageSourceFromBitmap(Properties.Resources.Fire.ToBitmap());
             InitializeComponent();
-            usbController.AddListener(HandleDevices);
-            usbController.StartWorker();
-        }
-
-        private void HandleDevices(UsbController.Device[] devices)
-        {
-            foreach (var device in devices)
-            {
-                Log.Debug($"{device.Mode} - {device.Description}");
-            }
         }
     }
 }

PotatoNV-next/PotatoNV-next.csproj

@@ -129,6 +129,9 @@
     <Compile Include="Controls\LogBox.xaml.cs">
       <DependentUpon>LogBox.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Controls\NVForm.xaml.cs">
+      <DependentUpon>NVForm.xaml</DependentUpon>
+    </Compile>
     <Compile Include="Utils\Log.cs" />
     <Compile Include="Utils\MediaConverter.cs" />
     <Compile Include="Utils\UsbController.cs" />
@@ -144,6 +147,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="Controls\NVForm.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="MainWindow.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>

PotatoNV-next/Utils/Log.cs

@@ -9,6 +9,7 @@ namespace PotatoNV_next.Utils
     public class Log
     {
         public static bool PrintDebug { get; set; } = false;
+
         private static List<Action<LogEventArgs>> actions = new List<Action<LogEventArgs>>();
 
         public enum Status