OSMServer/OSMDatastructure/Graph/OsmNode.cs

using System.Text.Json.Serialization;

namespace OSMDatastructure.Graph;

[Serializable]
public class OsmNode
{
    public ulong nodeId { get; }
    public HashSet<OsmEdge> edges { get; set; }
    public Coordinates coordinates { get; }

    public OsmNode(ulong nodeId, float lat, float lon)
    {
        this.nodeId = nodeId;
        edges = new();
        coordinates = new Coordinates(lat, lon);
    }

    [JsonConstructor]
    public OsmNode(ulong nodeId, Coordinates coordinates)
    {
        this.nodeId = nodeId;
        edges = new();
        this.coordinates = coordinates;
    }
    
    public OsmEdge? GetEdgeToNode(OsmNode n)
    {
        HashSet<OsmEdge> e = edges.Where(edge => edge.neighborId == n.nodeId).ToHashSet();
        if (e.Count > 0)
            return e.First();
        
        return null;
    }

    public override bool Equals(object? obj)
    {
        return obj != null && obj.GetType() == this.GetType() && ((OsmNode)obj).nodeId == this.nodeId;
    }

    public override string ToString()
    {
        return $"{nodeId} {coordinates} ec:{edges.Count}";
    }
}