public JsonResult GetShapes()
{
var graph = new ShapeGroupModel();
var edges = ReadFile("graph.txt");
graph.Shapes = edges.GroupBy(p => p.ShapeId).Select(s =>
new ShapeGroupModel.ShapeModel()
{
Points = s.SelectMany(ep => new List <Edge.Point>()
{
ep.PointA, ep.PointB
}).Distinct().Select(pm => new ShapeGroupModel.PointModel()
{
Lat = pm.Lat,
Lng = pm.Lng
}).ToList()
}).ToList();
return(Json(graph, JsonRequestBehavior.AllowGet));
}
public ActionResult SaveGraph(ShapeGroupModel model)
{
var existingEdges = new List <Edge>();
var existingPoints = new List <Edge.Point>();
foreach (var shape in model.Shapes)
{
int index = 0;
Edge currentEdge = null;
var shapeId = Guid.NewGuid();
foreach (var point in shape.Points)
{
// need we snap first and last points to the nearest vertice, within 20km
var ordered = existingPoints.Select(p => new
{
Point = p,
Distance = GetDistance(p.Lat, p.Lng, point.Lat, point.Lng)
}).OrderBy(p => p.Distance).ToList();
var snapIn = ordered.FirstOrDefault(p => p.Distance < 5000);
if (snapIn != null)
{
point.Lat = snapIn.Point.Lat;
point.Lng = snapIn.Point.Lng;
}
var edge = new Edge.Point(point.Lat, point.Lng);
existingPoints.Add(edge);
if (currentEdge == null)
{
currentEdge = new Edge()
{
PointA = edge,
ShapeId = shapeId
};
}
else
{
currentEdge.PointB = edge;
currentEdge.Distance = GetDistance(currentEdge.PointA.Lat, currentEdge.PointA.Lng,
currentEdge.PointB.Lat, currentEdge.PointB.Lng);
existingEdges.Add(currentEdge);
// We start up a new edge
currentEdge = new Edge()
{
PointA = edge,
ShapeId = shapeId
};
}
index++;
}
}
SaveFile("graph.txt", existingEdges);
return(Json(new { success = true }));
}