Sheas-Cealer/Utils/NginxCleaner.cs

using Sheas_Cealer.Consts;
using System;
using System.IO;
using System.Security.Cryptography.X509Certificates;
using System.Threading;
using System.Threading.Tasks;

namespace Sheas_Cealer.Utils;

internal static class NginxCleaner
{
    internal static readonly SemaphoreSlim IsNginxCleaningSemaphore = new(1);

    internal static async Task Clean()
    {
        if (!await IsNginxCleaningSemaphore.WaitAsync(0))
            return;

        try
        {
            string hostsContent = await File.ReadAllTextAsync(MainConst.HostsConfPath);
            int hostsConfStartIndex = hostsContent.IndexOf(MainConst.HostsConfStartMarker, StringComparison.Ordinal);
            int hostsConfEndIndex = hostsContent.LastIndexOf(MainConst.HostsConfEndMarker, StringComparison.Ordinal);

            if (hostsConfStartIndex != -1 && hostsConfEndIndex != -1)
                await File.WriteAllTextAsync(MainConst.HostsConfPath, hostsContent.Remove(hostsConfStartIndex, hostsConfEndIndex - hostsConfStartIndex + MainConst.HostsConfEndMarker.Length));

            using X509Store certStore = new(StoreName.Root, StoreLocation.CurrentUser, OpenFlags.ReadWrite);

            foreach (X509Certificate2 storedCert in certStore.Certificates)
                if (storedCert.Subject == MainConst.NginxRootCertSubjectName)
                    while (true)
                        try
                        {
                            certStore.Remove(storedCert);

                            break;
                        }
                        catch { }

            certStore.Close();
        }
        finally { IsNginxCleaningSemaphore.Release(); }
    }
}