Install.cs

#if !LINUX
using System;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows;
namespace IdleMafiaBot
{
    static class Install
    {
        internal static string Folder
        {
            get { return Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Programs", Program.Name); }
        }
        internal static bool Offer(string[] args, string dir)
        {
            if (Program.Whale || Program.Reroller || args.Length > 0) return false;
            try
            {
                if (File.Exists(Path.Combine(dir, "IdleMafiaBot.ini"))) return false;
                return !Same(dir, Folder);
            }
            catch (Exception) { return false; }
        }
        static bool Same(string a, string b)
        {
            return string.Equals(Path.GetFullPath(a).TrimEnd('\\'), Path.GetFullPath(b).TrimEnd('\\'), StringComparison.OrdinalIgnoreCase);
        }
        internal static bool AskAndRun(string exePath)
        {
            var answer = MessageBox.Show(
                "Install " + Program.Name + " on this PC?\n\n"
                + "It goes in its own folder with a shortcut on your desktop and in the Start menu. "
                + "Check for updates keeps it up to date there.\n\n"
                + "No: it runs from this folder, as before.",
                Program.Name, MessageBoxButton.YesNo, MessageBoxImage.Question);
            if (answer != MessageBoxResult.Yes) return false;
            string why = Copy(exePath, Folder);
            if (why != null)
            {
                MessageBox.Show("Couldn't install it (" + why + "). It runs from this folder instead.", Program.Name);
                return false;
            }
            string installed = Path.Combine(Folder, "IdleMafiaBot.exe");
            Shortcuts(installed);
            try
            {
                Process.Start(new ProcessStartInfo(installed, "--restarted") { WorkingDirectory = Folder, UseShellExecute = true });
                return true;
            }
            catch (Exception e)
            {
                MessageBox.Show("It was installed, but Windows wouldn't start it (" + e.Message + "). Start it from the shortcut on your desktop.", Program.Name);
                return true;
            }
        }
        internal static string Copy(string exePath, string folder)
        {
            try
            {
                Directory.CreateDirectory(folder);
                string target = Path.Combine(folder, "IdleMafiaBot.exe");
                bool replace = true;
                if (File.Exists(target))
                {
                    Version have, mine = Version.Parse(Program.Version);
                    var info = FileVersionInfo.GetVersionInfo(target);
                    if (Version.TryParse(info.FileVersion ?? "", out have) && have > mine) replace = false;
                }
                if (replace)
                {
                    string fresh = target + ".new";
                    File.Copy(exePath, fresh, true);
                    if (File.Exists(target)) File.Delete(target);
                    File.Move(fresh, target);
                    string readme = Path.Combine(Path.GetDirectoryName(exePath), "README.txt");
                    if (File.Exists(readme)) File.Copy(readme, Path.Combine(folder, "README.txt"), true);
                }
                return null;
            }
            catch (Exception e) { return e.Message; }
        }
        internal static void Shortcuts(string exe)
        {
            string name = Program.Name + ".lnk";
            foreach (var place in new[] { Environment.SpecialFolder.DesktopDirectory, Environment.SpecialFolder.Programs })
                try { MakeLink(Path.Combine(Environment.GetFolderPath(place), name), exe); }
                catch (Exception) { }
        }
        static void MakeLink(string lnk, string exe)
        {
            var link = (IShellLinkW)new ShellLink();
            link.SetPath(exe);
            link.SetWorkingDirectory(Path.GetDirectoryName(exe));
            link.SetIconLocation(exe, 0);
            link.SetDescription(Program.Name);
            ((IPersistFile)link).Save(lnk, true);
            Marshal.ReleaseComObject(link);
        }
        [ComImport, Guid("00021401-0000-0000-C000-000000000046")]
        class ShellLink { }
        [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("000214F9-0000-0000-C000-000000000046")]
        interface IShellLinkW
        {
            void GetPath([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder file, int max, IntPtr fd, int flags);
            void GetIDList(out IntPtr ppidl);
            void SetIDList(IntPtr pidl);
            void GetDescription([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder name, int max);
            void SetDescription([MarshalAs(UnmanagedType.LPWStr)] string name);
            void GetWorkingDirectory([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder dir, int max);
            void SetWorkingDirectory([MarshalAs(UnmanagedType.LPWStr)] string dir);
            void GetArguments([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder args, int max);
            void SetArguments([MarshalAs(UnmanagedType.LPWStr)] string args);
            void GetHotkey(out short key);
            void SetHotkey(short key);
            void GetShowCmd(out int cmd);
            void SetShowCmd(int cmd);
            void GetIconLocation([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder path, int max, out int icon);
            void SetIconLocation([MarshalAs(UnmanagedType.LPWStr)] string path, int icon);
            void SetRelativePath([MarshalAs(UnmanagedType.LPWStr)] string path, int reserved);
            void Resolve(IntPtr hwnd, int flags);
            void SetPath([MarshalAs(UnmanagedType.LPWStr)] string file);
        }
        [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("0000010b-0000-0000-C000-000000000046")]
        interface IPersistFile
        {
            void GetClassID(out Guid clsid);
            [PreserveSig] int IsDirty();
            void Load([MarshalAs(UnmanagedType.LPWStr)] string file, int mode);
            void Save([MarshalAs(UnmanagedType.LPWStr)] string file, [MarshalAs(UnmanagedType.Bool)] bool remember);
            void SaveCompleted([MarshalAs(UnmanagedType.LPWStr)] string file);
            void GetCurFile([MarshalAs(UnmanagedType.LPWStr)] out string file);
        }
    }
}
#endif