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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml;

namespace XMLConverter
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void buttonBrowseSource_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            if (ofd.ShowDialog() == DialogResult.OK)
                textBoxSource.Text = ofd.FileName;
        }

        private void buttonBrowseDest_Click(object sender, EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            if (sfd.ShowDialog() == DialogResult.OK)
                textBoxDest.Text = sfd.FileName;
        }

        private void buttonStart_Click(object sender, EventArgs e)
        {
            string xml;
            try
            {
                using (StreamReader sr = new StreamReader(textBoxSource.Text))
                {
                    xml = sr.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Fehler beim Lesen der Datei:\n\n" + ex);
                return;
            }

            if (xml.Contains("</RouteModelType>"))
            {
                Format1ToFormat2(xml);
            }
            else
            {
                Format2ToFormat1(xml);
            }
        }

        private void Format2ToFormat1(string xml)
        {
            XmlDocument input = new XmlDocument();
            XmlDocument output = new XmlDocument();

            XmlDeclaration xmlDeclaration = output.CreateXmlDeclaration("1.0", "UTF-8", null);
            XmlElement root = output.DocumentElement;
            output.InsertBefore(xmlDeclaration, root);

            XmlElement routeModelTypeNode = output.CreateElement("RouteModelType");
            XmlAttribute xsdAttribute = output.CreateAttribute("xmlns:xsd");
            xsdAttribute.Value = "http://www.w3.org/2001/XMLSchema";
            XmlAttribute xsiAttribute = output.CreateAttribute("xmlns:xsi");
            xsiAttribute.Value = "http://www.w3.org/2001/XMLSchema-instance";
            routeModelTypeNode.Attributes.Append(xsdAttribute);
            routeModelTypeNode.Attributes.Append(xsiAttribute);
            output.InsertBefore(xmlDeclaration, root);
            output.AppendChild(routeModelTypeNode);

            input.LoadXml(xml);
            string routeName = input.DocumentElement.ChildNodes[0].Attributes[1].Value;

            XmlElement routeNameNode = output.CreateElement("Name");
            routeNameNode.InnerText = routeName;
            routeModelTypeNode.AppendChild(routeNameNode);

            XmlElement notesNode = output.CreateElement("Notes");
            routeModelTypeNode.AppendChild(notesNode);

            foreach (XmlNode node in input.GetElementsByTagName("waypoint"))
            {
                routeModelTypeNode.AppendChild(createWayPoint(output, node));
            }

            try
            {
                output.Save(textBoxDest.Text);
                MessageBox.Show("erledigt!");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Fehler beim Schreiben der Datei:\n\n" + ex);
            }
        }

        private XmlElement createWayPoint(XmlDocument document, XmlNode node)
        {
            XmlElement result = document.CreateElement("Waypoints");
            XmlElement waypointName = document.CreateElement("Name");
            XmlElement latitude = document.CreateElement("Latitude");
            XmlElement longitude = document.CreateElement("Longitude");
            XmlElement notes = document.CreateElement("Notes");
            XmlElement isParameterPoint = document.CreateElement("IsParameterPoint");
            XmlElement sailMode = document.CreateElement("SailMode");
            XmlElement isArrivalPoint = document.CreateElement("IsArrivalPoint");
            XmlElement radius = document.CreateElement("Radius");
            XmlElement trackLimit = document.CreateElement("TrackLimit");
            XmlElement courseLimit = document.CreateElement("CourseLimit");
            XmlElement economy = document.CreateElement("Economy");
            XmlElement maximalSpeed = document.CreateElement("MaximalSpeed");

            waypointName.InnerText = node.Attributes["name"].Value;

            latitude.InnerText = convertCoordinate(node.Attributes["lat"].Value);
            longitude.InnerText = convertCoordinate(node.Attributes["lon"].Value);

            isParameterPoint.InnerText = "false";
            sailMode.InnerText = "0";
            isArrivalPoint.InnerText = "false";
            radius.InnerText = "463";
            trackLimit.InnerText = "1000";
            courseLimit.InnerText = "0";
            economy.InnerText = "0";
            maximalSpeed.InnerText = "0";
            
            result.AppendChild(waypointName);
            result.AppendChild(latitude);
            result.AppendChild(longitude);
            for (int i = 0; i < 5; i++)
            {
                result.AppendChild(i==0?notes:notes.Clone());
            }
            result.AppendChild(isParameterPoint);
            result.AppendChild(sailMode);
            result.AppendChild(isArrivalPoint);
            result.AppendChild(radius);
            result.AppendChild(trackLimit);
            result.AppendChild(courseLimit);
            result.AppendChild(economy);
            result.AppendChild(maximalSpeed);

            return result;
        }

        private string convertCoordinate(String coordinate)
        {
            Double result = Double.Parse(coordinate, CultureInfo.InvariantCulture);
            result *= Math.PI / 180;

            return "" + result.ToString(CultureInfo.InvariantCulture);
        }

        private void Format1ToFormat2(string xml)
        {
            xml = xml.Remove(0, xml.IndexOf("<Name>") + 6);
            string name = xml.Substring(0, xml.IndexOf("</Name>"));
            StringBuilder output = new StringBuilder();
            output.AppendLine("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
            output.AppendLine();
            output.AppendLine("<sposroutetemplate xmlns=\"http://www.meteogroup-maritime.com/spos/routetemplate\" xmlVersion=\"1\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">");
            output.AppendLine();
            output.AppendLine();
            output.AppendLine("<template created=\"2015-02-23T14:13:58.5077114Z\" name=\"" + name + "\">");
            output.AppendLine();
            output.AppendLine();
            output.AppendLine("<waypoints>");
            output.AppendLine();
            while (xml.IndexOf("</Waypoints>") > 0)
            {
                xml = xml.Remove(0, xml.IndexOf("<Name>") + 6);
                name = xml.Substring(0, xml.IndexOf("</Name>"));
                xml = xml.Remove(0, xml.IndexOf("<Latitude>") + 10);
                double latitude = double.Parse(xml.Substring(0, xml.IndexOf("</Latitude>")), CultureInfo.InvariantCulture) * 180 / Math.PI;
                xml = xml.Remove(0, xml.IndexOf("<Longitude>") + 11);
                double longitude = double.Parse(xml.Substring(0, xml.IndexOf("</Longitude>")), CultureInfo.InvariantCulture) * 180 / Math.PI;
                xml = xml.Remove(0, xml.IndexOf("</Waypoints>") + 12);
                output.AppendLine("<waypoint name=\"" + name + "\" ignoreLand=\"false\" routeTemplatePointType=\"Fixed\" tracktype=\"RhumbLine\" useSpeed=\"false\" speed=\"0\" delay=\"PT0S\" lon=\"" + longitude.ToString(CultureInfo.InvariantCulture) + "\" lat=\"" + latitude.ToString(CultureInfo.InvariantCulture) + "\"/>");
                output.AppendLine();
            }
            output.AppendLine("</waypoints>");
            output.AppendLine();
            output.AppendLine("</template>");
            output.AppendLine();
            output.AppendLine("</sposroutetemplate>");
            try
            {
                using (StreamWriter sw = new StreamWriter(textBoxDest.Text))
                    sw.Write(output.ToString());
                MessageBox.Show("erledigt!");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Fehler beim Schreiben der Datei:\n\n" + ex);
            }
        }
    }
}