OSMServer/Pathfinding/RegionManager.cs

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C#
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using OSMDatastructure;
using OSMDatastructure.Graph;
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namespace OSMImporter
{
public class RegionManager
{
private string workingDirectory { get; }
private readonly Dictionary<int, Region> _regions = new();
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public RegionManager(string workingDirectory)
{
this.workingDirectory = workingDirectory;
}
/// <summary>
/// Checks wether the Region is already loaded and returns the Region, or tries to load the Region from file in workingDirectory
/// </summary>
/// <param name="coordinates">Coordinates of the Region (or within the Region) to load</param>
/// <returns>The Region at the specified Coordinates containing Nodes and Connections</returns>
/// <exception cref="FileNotFoundException">If the Regionfile can not be found.</exception>
public Region GetRegion(Coordinates coordinates)
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{
if(_regions.ContainsKey(Coordinates.GetRegionHashCode(coordinates)))
return _regions[Coordinates.GetRegionHashCode(coordinates)];
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else
{
Region loadedRegion = LoadRegion(coordinates);
_regions.Add(loadedRegion.regionHash, value: loadedRegion);
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return loadedRegion;
}
}
public Region[] GetAllRegions()
{
return this._regions.Values.ToArray();
}
/// <summary>
///
/// </summary>
/// <param name="coordinates">Coordinates of the Region (or within the Region) to load</param>
/// <returns>The Region at the specified Coordinates containing Nodes and Connections</returns>
/// <exception cref="FileNotFoundException">If the Regionfile can not be found.</exception>
private Region LoadRegion(Coordinates coordinates)
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{
string fullPath = Path.Combine(workingDirectory, Coordinates.GetRegionHashCode(coordinates).ToString());
DateTime startTime = DateTime.Now;
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if (!File.Exists(fullPath))
{
throw new FileNotFoundException(string.Format("[{0}] Region does not exist: {1}", startTime, fullPath));
}
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FileStream fileStream = new FileStream(fullPath, FileMode.Open);
long fileStreamLength = fileStream.Length;
Console.WriteLine("[{0}] Loading [{1}]bytes from {2}", startTime.ToLocalTime(), fileStreamLength, fullPath);
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byte[] regionBytes = new byte[fileStream.Length];
int loadedBytesLength = fileStream.Read(regionBytes, 0, regionBytes.Length);
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fileStream.Close();
Console.WriteLine("\tLoaded [{0}]bytes ({1:P1}) in [{2}]ms", loadedBytesLength, fileStreamLength / loadedBytesLength,DateTime.Now.Subtract(startTime).TotalMilliseconds);
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return ByteConverter.ToRegion(regionBytes);
}
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public OsmNode? GetNode(Coordinates coordinates)
{
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Region regionWithNode = GetRegion(coordinates);
return regionWithNode.GetNodeWithCoordinates(coordinates);
}
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}
}