LanMountainDesktop/LanMountainDesktop/Services/UpdateSettingsValues.cs

using System;

namespace LanMountainDesktop.Services;

public static class UpdateSettingsValues
{
    public const string ChannelStable = "stable";
    public const string ChannelPreview = "preview";

    public const string ModeManual = "manual";
    public const string ModeDownloadThenConfirm = "download_then_confirm";
    public const string ModeSilentOnExit = "silent_on_exit";
    public const string ModeSilentDownload = ModeDownloadThenConfirm;
    public const string ModeSilentInstall = ModeSilentOnExit;

    // NOTE: keep constant name for compatibility with existing call sites.
    public const string DownloadSourcePlonds = "plonds-api";
    public const string DownloadSourcePdc = DownloadSourcePlonds;
    public const string DownloadSourceStcn = DownloadSourcePlonds;
    public const string LegacyDownloadSourcePlonds = "pdc";
    public const string LegacyDownloadSourcePdc = LegacyDownloadSourcePlonds;
    public const string LegacyDownloadSourceStcn = "stcn";
    public const string DownloadSourceGitHub = "github";
    public const string DownloadSourceGhProxy = "gh-proxy";
    public const string PlondsStaticBaseUrlEnvironmentVariable = "LANMOUNTAIN_UPDATE_BASE_URL";
    public const string DefaultPlondsStaticBaseUrl = "https://cn-nb1.rains3.com/lmdesktop/lanmountain/update";

    public const int DefaultDownloadThreads = 4;
    public const int MinDownloadThreads = 1;
    public const int MaxDownloadThreads = 128;
    public const string DefaultGhProxyBaseUrl = "https://gh-proxy.com/";

    public static string NormalizeChannel(string? value, bool includePrereleaseFallback = false)
    {
        if (string.Equals(value, ChannelPreview, StringComparison.OrdinalIgnoreCase))
        {
            return ChannelPreview;
        }

        if (string.Equals(value, ChannelStable, StringComparison.OrdinalIgnoreCase))
        {
            return ChannelStable;
        }

        return includePrereleaseFallback ? ChannelPreview : ChannelStable;
    }

    public static string NormalizeMode(string? value)
    {
        if (string.Equals(value, ModeManual, StringComparison.OrdinalIgnoreCase))
        {
            return ModeManual;
        }

        if (string.Equals(value, ModeSilentOnExit, StringComparison.OrdinalIgnoreCase))
        {
            return ModeSilentOnExit;
        }

        return ModeDownloadThenConfirm;
    }

    public static string NormalizeDownloadSource(string? value)
    {
        if (string.Equals(value, LegacyDownloadSourcePlonds, StringComparison.OrdinalIgnoreCase))
        {
            return DownloadSourcePlonds;
        }

        if (string.Equals(value, LegacyDownloadSourceStcn, StringComparison.OrdinalIgnoreCase))
        {
            return DownloadSourcePlonds;
        }

        if (string.Equals(value, DownloadSourcePlonds, StringComparison.OrdinalIgnoreCase))
        {
            return DownloadSourcePlonds;
        }

        if (string.Equals(value, DownloadSourceGhProxy, StringComparison.OrdinalIgnoreCase))
        {
            return DownloadSourceGhProxy;
        }

        if (string.Equals(value, DownloadSourceGitHub, StringComparison.OrdinalIgnoreCase))
        {
            return DownloadSourceGitHub;
        }

        return DownloadSourcePlonds;
    }

    public static int NormalizeDownloadThreads(int value)
    {
        return Math.Clamp(value, MinDownloadThreads, MaxDownloadThreads);
    }
}