BUTR/Bannerlord.BLSE

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace Bannerlord.LauncherEx.Helpers;

internal static class ConfigReader
{
    private static readonly string BOMMarkUtf8 = Encoding.UTF8.GetString(Encoding.UTF8.GetPreamble());

    public static readonly string GameConfigPath =
        Path.Combine($@"{Environment.GetFolderPath(Environment.SpecialFolder.Personal)}", "Mount and Blade II Bannerlord", "Configs", "BannerlordConfig.txt");
    public static readonly string EngineConfigPath =
        Path.Combine($@"{Environment.GetFolderPath(Environment.SpecialFolder.Personal)}", "Mount and Blade II Bannerlord", "Configs", "engine_config.txt");

    public static Dictionary<string, string> GetGameOptions(Func<string, byte[]?> readFileContent)
    {
        var dict = new Dictionary<string, string>();
        if (readFileContent(GameConfigPath) is not { } data) return dict;
        try
        {
            var content = Encoding.UTF8.GetString(data);
            if (content.StartsWith(BOMMarkUtf8, StringComparison.Ordinal))
                content = content.Remove(0, BOMMarkUtf8.Length);

            foreach (var keyValue in content.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.RemoveEmptyEntries))
            {
                var split = keyValue.Split(new[] { "=" }, StringSplitOptions.RemoveEmptyEntries);
                if (split.Length != 2) continue;
                var key = split[0].Trim();
                var value = split[1].Trim();
                dict[key] = value;
            }
        }
        catch (Exception) { /* ignore */ }
        return dict;
    }
    public static Dictionary<string, string> GetEngineOptions(Func<string, byte[]?> readFileContent)
    {
        var dict = new Dictionary<string, string>();
        if (readFileContent(EngineConfigPath) is not { } data) return dict;
        try
        {
            var content = Encoding.UTF8.GetString(data);
            if (content.StartsWith(BOMMarkUtf8, StringComparison.Ordinal))
                content = content.Remove(0, BOMMarkUtf8.Length);

            foreach (var keyValue in content.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.RemoveEmptyEntries))
            {
                var split = keyValue.Split(new[] { "=" }, StringSplitOptions.RemoveEmptyEntries);
                if (split.Length != 2) continue;
                var key = split[0].Trim();
                var value = split[1].Trim();
                dict[key] = value;
            }
        }
        catch (Exception) { /* ignore */ }
        return dict;
    }
}