/* Usage
    private static string GetProjectLanguages()
    {
        string value = null;
        ActionCallingContext actionCallingContext = new ActionCallingContext();
        new CommandLineInterpreter().Execute("GetProjectLanguages", actionCallingContext);
        actionCallingContext.GetParameter("value", ref value);
        return value;
    }
*/

using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Xml;
using Eplan.EplApi.ApplicationFramework;
using Eplan.EplApi.Base;
using Eplan.EplApi.Scripting;

namespace EplanScriptingProjectBySuplanus.GetProjectLanguages
{
    public class GetProjectLanguages
    {
        private readonly string TempPath = Path.Combine(
            PathMap.SubstitutePath("$(TMP)"), "GetProjectLanguages.xml");

        [DeclareAction("GetProjectLanguages")]
        public void Action(out string value)
        {
            ActionCallingContext actionCallingContext = new ActionCallingContext();
            actionCallingContext.AddParameter("prj", FullProjectPath());
            actionCallingContext.AddParameter("node", "TRANSLATEGUI");
            actionCallingContext.AddParameter("XMLFile", TempPath);
            new CommandLineInterpreter().Execute("XSettingsExport", actionCallingContext);

            if (File.Exists(TempPath))
            {
                string languagesString = GetValueSettingsXml(TempPath,
                    "/Settings/CAT/MOD/Setting[@name='TRANSLATE_LANGUAGES']/Val");

                if (languagesString != null)
                {
                    List<string> languages = languagesString.Split(';').ToList();
                    languages = languages.Where(obj => !obj.Equals("")).ToList();

                    StringBuilder stringBuilder = new StringBuilder();
                    for (int i = 0; i < languages.Count; i++)
                    {
                        var language = languages[i];
                        stringBuilder.Append(language);

                        // not last one
                        if (i != languages.Count - 1)
                        {
                            stringBuilder.Append("|");
                        }
                    }

                    // returns list: "de_DE|en_EN"
                    value = stringBuilder.ToString();
                    return;
                }
            }

            value = null;
            return;
        }

        // Returns the EPLAN Project Path
        private static string FullProjectPath()
        {
            ActionCallingContext acc = new ActionCallingContext();
            acc.AddParameter("TYPE", "PROJECT");

            string projectPath = string.Empty;
            new CommandLineInterpreter().Execute("selectionset", acc);
            acc.GetParameter("PROJECT", ref projectPath);

            return projectPath;
        }

        // Read EPLAN XML-ProjectInfo and returns the value
        private static string GetValueSettingsXml(string filename, string url)
        {
            XmlDocument xmlDocument = new XmlDocument();
            xmlDocument.Load(filename);

            XmlNodeList rankListSchemaName = xmlDocument.SelectNodes(url);
            if (rankListSchemaName != null && rankListSchemaName.Count > 0)
            {
                // Get Text from MultiLanguage or not :)
                string value = rankListSchemaName[0].InnerText;
                return value;
            }
            else
            {
                return null;
            }
        }
    }
}