focalboard/win-wpf/Focalboard/App.xaml.cs

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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
using System;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using System.Windows;
using Windows.Storage;
namespace Focalboard {
/// <summary>
/// Interaction logic for App.xaml
/// </summary>
public partial class App : Application {
public string sessionToken = "";
public int port;
private Mutex mutex;
App() {
SingleInstanceCheck();
Startup += App_Startup;
}
public void SingleInstanceCheck() {
bool isOnlyInstance = false;
mutex = new Mutex(true, @"Focalboard", out isOnlyInstance);
if (!isOnlyInstance) {
ShowExistingWindow();
Shutdown();
}
}
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);
[DllImport("user32.dll")]
private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
// shows the window of the single-instance that is already open
private void ShowExistingWindow() {
var currentProcess = Process.GetCurrentProcess();
var processes = Process.GetProcessesByName(currentProcess.ProcessName);
foreach (var process in processes) {
// the single-instance already open should have a MainWindowHandle
if (process.MainWindowHandle != IntPtr.Zero) {
// restores the window in case it was minimized
const int SW_SHOWNORMAL = 1;
ShowWindow(process.MainWindowHandle, SW_SHOWNORMAL);
// brings the window to the foreground
SetForegroundWindow(process.MainWindowHandle);
return;
}
}
}
private void App_Startup(object sender, StartupEventArgs e) {
Debug.WriteLine($"App_Startup()");
try {
InitServer();
} catch (Exception ex) {
MessageBox.Show($"InitServer ERROR: {ex.ToString()}", "Focalboard");
Shutdown();
}
}
private void InitServer() {
port = FindFreePort();
Debug.WriteLine("port: {0}", port);
sessionToken = CreateSessionToken();
// Need to set CWD so the server can read the config file
var appFolder = Utils.GetAppFolder();
Directory.SetCurrentDirectory(appFolder);
string appDataFolder;
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try {
appDataFolder = ApplicationData.Current.LocalFolder.Path;
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} catch {
var documentsFolder = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
appDataFolder = Path.Combine(documentsFolder, "Focalboard");
Directory.CreateDirectory(appDataFolder);
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// Not a UWP app, store in Documents
// FIXUP code: Copy from old DB location
var oldDBPath = Path.Combine(documentsFolder, "focalboard.db");
var newDBPath = Path.Combine(appDataFolder, "focalboard.db");
if (!File.Exists(newDBPath) && File.Exists(oldDBPath)) {
Debug.WriteLine($"Moving DB file from: {oldDBPath} to {newDBPath}");
File.Move(oldDBPath, newDBPath);
}
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}
var dbPath = Path.Combine(appDataFolder, "focalboard.db");
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Debug.WriteLine($"dbPath: {dbPath}");
var filesPath = Path.Combine(appDataFolder, "files");
Debug.WriteLine($"filesPath: {filesPath}");
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var cwd = Directory.GetCurrentDirectory();
var webFolder = Path.Combine(cwd, @"pack");
webFolder = webFolder.Replace(@"\", @"/");
filesPath = filesPath.Replace(@"\", @"/");
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dbPath = dbPath.Replace(@"\", @"/");
byte[] webFolderBytes = Encoding.UTF8.GetBytes(webFolder);
byte[] filesPathBytes = Encoding.UTF8.GetBytes(filesPath);
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byte[] sessionTokenBytes = Encoding.UTF8.GetBytes(sessionToken);
byte[] dbPathBytes = Encoding.UTF8.GetBytes(dbPath);
byte[] configFilePathBytes = Encoding.UTF8.GetBytes("");
GoFunctions.StartServer(webFolderBytes, filesPathBytes, port, sessionTokenBytes, dbPathBytes, configFilePathBytes);
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Debug.WriteLine("Server started");
}
private string CreateSessionToken() {
using (RandomNumberGenerator rng = new RNGCryptoServiceProvider()) {
byte[] tokenData = new byte[32];
rng.GetBytes(tokenData);
string token = Convert.ToBase64String(tokenData);
return token;
}
}
private int FindFreePort() {
int port = 0;
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try {
var localEP = new IPEndPoint(IPAddress.Any, 0);
socket.Bind(localEP);
localEP = (IPEndPoint)socket.LocalEndPoint;
port = localEP.Port;
} finally {
socket.Close();
}
return port;
}
}
static class GoFunctions {
[DllImport(@"focalboard-server.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
public static extern void StartServer(byte[] webPath, byte[] filesPath, int port, byte[] singleUserToken, byte[] dbConfigString, byte[] configFilePath);
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[DllImport(@"focalboard-server.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
public static extern void StopServer();
}
}