91 lines
3.1 KiB
C#
91 lines
3.1 KiB
C#
using System.Runtime.Serialization.Formatters.Binary;
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using OSMDatastructure;
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using OSMDatastructure.Graph;
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namespace Server;
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public class RegionLoader
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{
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private string path { get; }
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private Dictionary<ulong, Region> regionIdsDict;
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public RegionLoader(string path)
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{
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this.path = path;
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this.regionIdsDict = new();
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}
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public HashSet<OsmNode> GetNodes(ulong regionHash)
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{
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Region r = GetRegion(regionHash);
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return r.nodes;
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}
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public HashSet<OsmEdge> GetWays(ulong regionHash)
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{
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Region r = GetRegion(regionHash);
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return r.ways;
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}
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public TagManager GetTags(ulong regionHash)
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{
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Region r = GetRegion(regionHash);
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return r.tagManager;
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}
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public HashSet<Tag>? GetTagsForWay(ulong regionHash, ulong wayId)
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{
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Region r = GetRegion(regionHash);
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return r.tagManager.GetTagsForWayId(wayId);
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}
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public Region GetRegion(ulong regionHash)
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{
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if (regionIdsDict.ContainsKey(regionHash))
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return regionIdsDict[regionHash];
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else return LoadRegion(regionHash);
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}
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private Region LoadRegion(ulong regionHash)
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{
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Region newRegion = new Region(regionHash);
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BinaryFormatter bFormatter = new BinaryFormatter();
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if (regionIdsDict.ContainsKey(regionHash))
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throw new Exception("Region already loaded");
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if (!Directory.Exists(Path.Join(path, regionHash.ToString())))
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throw new FileNotFoundException("Region does not exist");
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#pragma warning disable SYSLIB0011
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using (FileStream wayFileStream = new FileStream(Path.Join(path, regionHash.ToString(), RegionConverter.WaysFileName), FileMode.Open))
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{
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while (wayFileStream.Position < wayFileStream.Length)
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{
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OsmEdge deserializedEdge = (OsmEdge)bFormatter.Deserialize(wayFileStream);
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newRegion.ways.Add(deserializedEdge);
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}
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}
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using (FileStream nodeFileStream = new FileStream(Path.Join(path, regionHash.ToString(), RegionConverter.NodesFileName), FileMode.Open))
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{
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while (nodeFileStream.Position < nodeFileStream.Length)
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{
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OsmNode deserializedNode = (OsmNode)bFormatter.Deserialize(nodeFileStream);
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newRegion.nodes.Add(deserializedNode);
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}
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}
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using (FileStream tagsFileStream = new FileStream(Path.Join(path, regionHash.ToString(), RegionConverter.tagsFileName), FileMode.Open))
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{
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while (tagsFileStream.Position < tagsFileStream.Length)
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{
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TagManager tm = (TagManager)bFormatter.Deserialize(tagsFileStream);
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ulong id = (ulong)tm.wayTagSets.First()!.Value.First(tag => tag.key == Tag.TagType.id)!.value;
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foreach(Tag tag in tm.wayTagSets.First()!.Value)
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newRegion.tagManager.AddTag(id, tag);
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}
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}
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#pragma warning restore SYSLIB0011
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regionIdsDict.Add(regionHash, newRegion);
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return newRegion;
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}
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} |