TBMM/GCMM/MainForm.cs

using GCMM.Properties;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Net;
using System.Reflection;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace GCMM
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private Dictionary<string, ModInfo> mods = new Dictionary<string, ModInfo>();

        private void Form1_Load(object sender, EventArgs e)
        {
            modlist.Items.Clear();
            UpdateButton(installbtn, false);
            modinfobox.Text = "";
            if (string.IsNullOrWhiteSpace(Settings.Default.GamePath))
            {
                Settings.Default.GamePath = GetGameFolder();
                if (string.IsNullOrWhiteSpace(Settings.Default.GamePath))
                    Settings.Default.GamePath = SelectGameFolder();
                else
                    MessageBox.Show("Found game at " + Settings.Default.GamePath);
                Settings.Default.Save();
            }
            if(string.IsNullOrWhiteSpace(Settings.Default.GamePath))
            {
                status.Text = "Status: Game not found";
                return;
            }
            CheckIfPatched();
            GetInstalledMods();
            GetAvailableMods();
        }

        private void playbtn_Click(object sender, EventArgs e)
        {
            if (playbtn.ForeColor == Color.Green) return; //Disabled
            if (!BeginWork()) return;
            PatchGame();
            EndWork();
        }

        private void settingsbtn_Click(object sender, EventArgs e)
        {
            if (settingsbtn.ForeColor == Color.Green) return; //Disabled
            var sf = new SettingsForm();
            sf.ShowDialog(this);
        }

        private void modlist_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (working) return;
            switch (modlist.SelectedItems.Count)
            {
                case 0:
                    modinfobox.Text = "";
                    UpdateButton(installbtn, false);
                    UpdateButton(uninstallbtn, false);
                    break;
                case 1:
                default:
                    installbtn.Text = "Install mod";
                    UpdateButton(installbtn, false);
                    UpdateButton(uninstallbtn, false);
                    foreach (ListViewItem item in modlist.SelectedItems)
                    {
                        var mod = mods[item.Name];
                        if (modlist.SelectedItems.Count == 1)
                            modinfobox.Text = mod.Description?.Replace("\n", Environment.NewLine);
                        else
                            modinfobox.Text = modlist.SelectedItems.Count + " mods selected";
                        if (mod.DownloadURL != null && !(mod.LatestVersion <= mod.Version))
                        {
                            UpdateButton(installbtn, true);
                            if (mod.Version != null)
                                installbtn.Text = "Update mod";
                            else
                                installbtn.Text = "Install mod";
                        }
                        if (mod.Version != null)
                            UpdateButton(uninstallbtn, true);
                    }
                    break;
            }
        }

        private async void installbtn_Click(object sender, EventArgs e)
        {
            if (installbtn.ForeColor == Color.Green) return; //Disabled
            if (!BeginWork()) return;
            foreach (ListViewItem item in modlist.SelectedItems)
            {
                if (item.Group.Name == "installed") continue;
                await InstallMod(mods[item.Name]);
            }
            EndWork();
        }
    }
}