73 lines
2.3 KiB
C#
73 lines
2.3 KiB
C#
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using System.Globalization;
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using System.Xml;
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using OSMDatastructure;
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namespace Server;
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public class RegionConverter
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{
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private static readonly XmlReaderSettings ReaderSettings = new()
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{
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IgnoreWhitespace = true,
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IgnoreComments = true
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};
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private static readonly NumberFormatInfo decimalInfo = new()
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{
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NumberDecimalSeparator = "."
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};
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public static HashSet<Region> ImportXml(string filePath)
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{
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if (!File.Exists(filePath))
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throw new FileNotFoundException();
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Console.WriteLine("Getting highwayNodeIds...");
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FileStream xmlFileStream = new FileStream(filePath, FileMode.Open);
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Dictionary<ulong, ulong> nodeIdRegionDict = GetNodesAndRegions(XmlReader.Create(xmlFileStream, ReaderSettings));
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xmlFileStream.Position = 0;
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Console.WriteLine("Importing Nodes...");
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Dictionary<ulong, OsmNode> nodes =
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GetHighwayNodesFromIds(XmlReader.Create(xmlFileStream, ReaderSettings), requiredNodeIds);
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requiredNodeIds.Clear();
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xmlFileStream.Position = 0;
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Console.WriteLine("Importing Ways...");
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HashSet<OsmNode> retNodes = ConnectNodes(XmlReader.Create(xmlFileStream, ReaderSettings), nodes);
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nodes.Clear();
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return retNodes;
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}
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private static Dictionary<ulong, ulong> GetNodesAndRegions(XmlReader xmlReader)
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{
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bool isHighway = false;
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while (xmlReader.ReadToFollowing("way"))
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{
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isHighway = false;
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currentIds.Clear();
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XmlReader wayReader = xmlReader.ReadSubtree();
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while (wayReader.Read())
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{
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if (xmlReader.Name == "tag" && xmlReader.GetAttribute("k")!.Equals("highway"))
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{
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isHighway = true;
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}
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else if (xmlReader.Name == "nd")
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{
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try
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{
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currentIds.Add(Convert.ToUInt64(xmlReader.GetAttribute("ref")));
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}
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catch (FormatException) { };
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}
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}
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if (isHighway)
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{
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retSet.UnionWith(currentIds);
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}
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wayReader.Close();
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}
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xmlReader.Close();
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}
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}
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