// Post
public JsonMarkersReply Markers(
double nelat, double nelon, double swlat, double swlon,
int zoomlevel, string filter, int sendid
)
{
var sw = new Stopwatch();
sw.Start();
var jsonReceive = new JsonGetMarkersReceive(nelat, nelon, swlat, swlon, zoomlevel, filter, sendid);
var clusteringEnabled = jsonReceive.IsClusteringEnabled || AlgoConfig.AlwaysClusteringEnabledWhenZoomLevelLess > jsonReceive.Zoomlevel;
JsonMarkersReply reply;
jsonReceive.Viewport.ValidateLatLon(); // Validate google map viewport input (is always valid)
jsonReceive.Viewport.Normalize();
// Get all points from memory
IPoints points = MemoryDatabase.GetPoints();
if (jsonReceive.TypeFilterExclude.Count == AlgoConfig.MarkerTypes.Count)
{
// Filter all
points = new Points(); // empty
}
else if (jsonReceive.TypeFilterExclude.Count > 0)
{
// Filter data by typeFilter value
// Make new obj, don't overwrite obj data
points = new Points
{
Data = points.Data
.Where(p => jsonReceive.TypeFilterExclude.Contains(p.T) == false)
.ToList()
};
}
// Create new instance for every ajax request with input all points and json data
var clusterAlgo = new GridCluster(points, jsonReceive); // create polylines
// Clustering
if (clusteringEnabled && jsonReceive.Zoomlevel < AlgoConfig.ZoomlevelClusterStop)
{
// Calculate data to be displayed
var clusterPoints = clusterAlgo.GetCluster(new ClusterInfo
{
ZoomLevel = jsonReceive.Zoomlevel,
});
var converted = DataConvert(clusterPoints);
// Prepare data to the client
reply = new JsonMarkersReply
{
Markers = converted,
Rid = sendid,
Polylines = clusterAlgo.Lines,
Msec = Sw(sw),
};
// Return client data
return(reply);
}
// If we are here then there are no clustering
// The number of items returned is restricted to avoid json data overflow
IPoints filteredDataset = ClusterAlgorithmBase.FilterDataset(points, jsonReceive.Viewport);
IPoints filteredDatasetMaxPoints = new Points
{
Data = filteredDataset.Data
.Take(AlgoConfig.MaxMarkersReturned)
.ToList()
};
reply = new JsonMarkersReply
{
Markers = DataConvert(filteredDatasetMaxPoints),
Rid = sendid,
Polylines = clusterAlgo.Lines,
Mia = filteredDataset.Count - filteredDatasetMaxPoints.Count,
Msec = Sw(sw),
};
return(reply);
}
/// <summary>
/// Read Through Cache
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public JsonMarkersReply GetMarkersHelper(JsonGetMarkersInput input)
{
try
{
var nelat = Math.Round(input.nelat.ToDouble(), Numbers.Round);
var nelon = Math.Round(input.nelon.ToDouble(), Numbers.Round);
var swlat = Math.Round(input.swlat.ToDouble(), Numbers.Round);
var swlon = Math.Round(input.swlon.ToDouble(), Numbers.Round);
var zoomLevel = int.Parse(input.zoomLevel);
var filter = input.filter ?? "";
// values are validated there
var inputValidated = new JsonGetMarkersReceive(nelat, nelon, swlat, swlon, zoomLevel, filter);
var grid = GridCluster.GetBoundaryExtended(inputValidated);
var cacheKeyHelper = string.Format("{0}_{1}_{2}", inputValidated.Zoomlevel, inputValidated.FilterHashCode(), grid.GetHashCode());
var cacheKey = CacheKeys.GetMarkers(cacheKeyHelper.GetHashCode());
var reply = _memCache.Get <JsonMarkersReply>(cacheKey);
if (reply != null)
{
// return cached data
reply.Cache = true;
return(reply);
}
inputValidated.Viewport.ValidateLatLon(); // Validate google map viewport input (should be always valid)
inputValidated.Viewport.Normalize();
// Get all points from memory
IList <P> points = _pointsDatabase.GetPoints();
#region fiter
// Filter points
points = FilterUtil.FilterByType(
points,
new FilterData {
TypeFilterExclude = inputValidated.TypeFilterExclude
}
);
#endregion filter
// Create new instance for every ajax request with input all points and json data
ICluster clusterAlgo = new GridCluster(points, inputValidated);
var clusteringEnabled = inputValidated.IsClusteringEnabled ||
GmcSettings.Get.AlwaysClusteringEnabledWhenZoomLevelLess > inputValidated.Zoomlevel;
// Clustering
if (clusteringEnabled && inputValidated.Zoomlevel < GmcSettings.Get.ZoomlevelClusterStop)
{
#region cluster
IList <P> markers = clusterAlgo.RunCluster();
#endregion cluster
reply = new JsonMarkersReply
{
Markers = markers,
Polylines = clusterAlgo.GetPolyLines(),
};
}
else
{
// If we are here then there are no clustering
// The number of items returned is restricted to avoid json data overflow
IList <P> filteredDataset = FilterUtil.FilterDataByViewport(points, inputValidated.Viewport);
IList <P> filteredDatasetMaxPoints = filteredDataset.Take(GmcSettings.Get.MaxMarkersReturned).ToList();
reply = new JsonMarkersReply
{
Markers = filteredDatasetMaxPoints,
Polylines = clusterAlgo.GetPolyLines(),
Mia = filteredDataset.Count - filteredDatasetMaxPoints.Count,
};
}
// if client ne and sw is inside a specific grid box then cache the grid box and the result
// next time test if ne and sw is inside the grid box and return the cached result
if (GmcSettings.Get.CacheServices)
{
_memCache.Set(reply, cacheKey, TimeSpan.FromMinutes(10)); // cache data
}
return(reply);
}
catch (Exception ex)
{
return(new JsonMarkersReply
{
Ok = "0",
EMsg = string.Format("MapService says: exception {0}", ex.Message)
});
}
}
// Get
public JsonMarkersReply GetMarkers(string s)
{
var invalid = new JsonMarkersReply {
Ok = "0"
};
if (string.IsNullOrWhiteSpace(s))
{
invalid.EMsg = "params is empty";
return(invalid);
}
var arr = s.Split(new[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
if (arr.Length < 5)
{
invalid.EMsg = "params length incorrect";
return(invalid);
}
var nvc = new NameValueCollection();
foreach (var a in arr)
{
var kv = a.Split(new[] { "=" }, StringSplitOptions.RemoveEmptyEntries);
if (kv.Length != 2)
{
continue;
}
nvc.Add(kv[0], kv[1]);
}
foreach (var key in Ajax.MarkersReq)
{
if (nvc[key] != null)
{
continue;
}
invalid.EMsg = string.Format("param {0} is missing", key);
return(invalid);
}
try
{
var nelat = nvc[Ajax.nelat].Replace("_", ".").ToDouble();
var nelon = nvc[Ajax.nelon].Replace("_", ".").ToDouble();
var swlat = nvc[Ajax.swlat].Replace("_", ".").ToDouble();
var swlon = nvc[Ajax.swlon].Replace("_", ".").ToDouble();
var zoomlevel = int.Parse(nvc[Ajax.zoom]);
var filter = nvc[Ajax.filter] ?? "";
var sendid = nvc[Ajax.sid] == null ? 1 : int.Parse(nvc[Ajax.sid]);
// values are validated there
return(Markers(nelat, nelon, swlat, swlon, zoomlevel,
filter, sendid));
}
catch (Exception ex)
{
invalid.EMsg = string.Format("Parsing error param: {0}",
ex.Message);
}
return(invalid);
}
