VeloeMinecraftLauncher/VeloeMinecraftLauncher/MinecraftLauncher/StartCommandBuilder.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

namespace VeloeMinecraftLauncher.MinecraftLauncher
{
    internal static class StartCommandBuilder
    {
        public static string Build(Entity.Version.Version version, string username)
        {
            var returnString = new StringBuilder();
            if (version is null)
                return returnString.ToString();

            if(Settings.setMaxRam)
                returnString.Append($"-Xmx{Settings.MaxRam}M ");

            //for forge
            if (version.inheritsFrom is null)
                returnString.Append($"-Djava.library.path={Settings.MinecraftForlderPath + "versions\\" + version.id + "\\natives\\"}");
            else
                returnString.Append($"-Djava.library.path={Settings.MinecraftForlderPath + "versions\\" + version.inheritsFrom + "\\natives\\"}");

            returnString.Append(" -cp ");

            foreach(var library in version.libraries)
            {
                if (library.natives is null)
                    returnString.Append(Settings.MinecraftForlderPath + "libraries\\" + library.downloads.artifact.path.Replace("/", "\\") + ";");

            }
            //for forge
            Entity.Version.Version inheritsFrom = new();
            if (version.inheritsFrom is null)
                returnString.Append(Settings.MinecraftForlderPath + "versions/" + version.id + "/" + version.id + ".jar");
            else
            {
                var inheritsJsonString = File.ReadAllText(Settings.MinecraftForlderPath + "versions/" + version.inheritsFrom + "/" + version.inheritsFrom + ".json");
                
                inheritsFrom = JsonSerializer.Deserialize<Entity.Version.Version>(inheritsJsonString);

                foreach (var library in inheritsFrom.libraries)
                {
                    if (library.natives is null)
                        returnString.Append(Settings.MinecraftForlderPath + "libraries\\" + library.downloads.artifact.path.Replace("/", "\\") + ";");
    
                }
                returnString.Append(Settings.MinecraftForlderPath + "versions/" + version.inheritsFrom + "/" + version.inheritsFrom + ".jar");
            }

            returnString.Append(" " + version.mainClass);

            List<string> args = new List<string>();
            List<string> argsValues = new List<string>();

            if (version.arguments is not null)
                foreach (var argument in version.arguments.game)
                {
                    if (argument is null)
                        continue;

                    var type = argument.GetType();

                    if (!(argument is JsonElement))
                        continue;

                    if (!(((JsonElement)argument).ValueKind == JsonValueKind.String))
                        continue;

                    var value = ((JsonElement)argument).Deserialize(typeof(string));

                    //if ()

                    if (!(value as string).Contains("--"))
                    {
                        argsValues.Add(value as string);
                        continue;
                    }

                    args.Add(value as string);
                }

            if (version.minecraftArguments is not null)
            {
                var minecraftArguments = version.minecraftArguments.Split(' ');
                //args = version.minecraftArguments.Split(' ').Where(x=> x.Contains("--")).ToList();
                for (int i = 0; i < minecraftArguments.Count(); i++)
                {
                    if (minecraftArguments[i].Contains("--"))
                        args.Add(minecraftArguments[i]);
                    else
                        argsValues.Add(minecraftArguments[i]);
                }
            }

            for (int i = 0; i < args.Count; i++)
            {
                switch (args[i])
                {
                    case "--username":
                        returnString.Append(" --username " + username);
                        break;
                    case "--version":
                        returnString.Append(" --version " + "\"Copy of VeloeLauncher\"");
                        break;
                    case "--gameDir":
                        //for forge
                        if (!(argsValues.Where(x => x.Contains("forge")).Count() > 0 || argsValues.Where(x => x.Contains("fabric")).Count() > 0))
                            returnString.Append(" --gameDir " + Settings.MinecraftForlderPath);
                        else
                            returnString.Append(" --gameDir " + Settings.MinecraftForlderPath + "versions\\" + version.id);
                        break;
                    case "--assetsDir":
                        //for forge
                        if (version.inheritsFrom is null)
                            returnString.Append(" --assetsDir " + Settings.MinecraftForlderPath + "assets\\" + version.assets + "\\");
                        else
                            returnString.Append(" --assetsDir " + Settings.MinecraftForlderPath + "assets\\" + inheritsFrom.assets + "\\");
                        break;
                    case "--assetIndex":
                        //for forge
                        if (version.inheritsFrom is null)
                            returnString.Append(" --assetIndex " + version.assets);
                        else
                            returnString.Append(" --assetIndex " + inheritsFrom.assets);
                        break;
                    case "--uuid":
                        returnString.Append(" --uuid sample_token");
                        break;
                    case "--accessToken":
                        returnString.Append(" --accessToken sample_token");
                        break;
                    case "--userType":
                        returnString.Append(" --userType offline");
                        break;
                    case "--userProperties":
                        returnString.Append(" --userProperties  " + "{\"veloelauncher\":[\"wtfisthis\"]}");
                        break;
                    case "--versionType":
                        returnString.Append(" --versionType " + version.type);
                        break;
                    case "--tweakClass":
                        returnString.Append(" --tweakClass");
                        if (argsValues[i] is not null)
                            returnString.Append(" " + argsValues[i]);
                        break;
                }
            }
            return returnString.ToString();
        }
    }
}