/// <summary>
/// Handles the incoming rest requests
/// </summary>
/// <param name="boundVariables"> The bound variables. </param>
/// <param name="operationInput"> The operation input. </param>
/// <param name="outputFormat"> The output format. </param>
/// <param name="requestProperties"> The request properties. </param>
/// <param name="responseProperties"> The response properties. </param>
/// <returns> </returns>
/// <exception cref="System.ArgumentNullException"></exception>
public static byte[] Handler(NameValueCollection boundVariables, JsonObject operationInput,
string outputFormat, string requestProperties,
out string responseProperties)
{
responseProperties = null;
var errors = new ErrorContainer(400);
var wkid = 26912;
//pull out all the variables
var featureClass = operationInput.GetStringValue("featureClass");
var returnValues = operationInput.GetStringValue("returnValues");
var predicate = operationInput.GetStringValue("predicate", nullable: true);
var geometryJson = operationInput.GetStringValue("geometry", nullable: true);
var wkidInput = operationInput.GetNumberValue("wkid", nullable: true);
var bufferInput = operationInput.GetNumberValue("buffer", nullable: true);
if (wkidInput > 0)
{
wkid = Convert.ToInt32(wkidInput);
}
var isSafeSqlCommand = new IsSafeSqlCommand(new[]
{
featureClass, returnValues, predicate
});
if (!CommandExecutor.ExecuteCommand(isSafeSqlCommand))
{
errors.Add("Input appears to be unsafe. That is all I will tell you.");
}
GeometryContainer container = null;
ISpatialReference newSpatialRefefence = null;
ISpatialReferenceFactory srFactory = null;
//reproject to our data's spatial reference
if (wkid != 26912)
{
srFactory = new SpatialReferenceEnvironmentClass();
var isProjected = true;
try
{
newSpatialRefefence = srFactory.CreateProjectedCoordinateSystem(wkid);
}
catch (ArgumentException)
{
isProjected = false;
}
if (!isProjected)
{
newSpatialRefefence = srFactory.CreateGeographicCoordinateSystem(wkid);
}
}
//input has a geometry - deal with it
if (!string.IsNullOrEmpty(geometryJson))
{
var extractGeometryCommand = new ExtractGeometryCommand(geometryJson);
container = CommandExecutor.ExecuteCommand(extractGeometryCommand);
if (container == null)
{
var message = "Geometry coordinates appear to be invalid.";
if (!string.IsNullOrEmpty(extractGeometryCommand.ErrorMessage))
{
message += " Maybe this information can help: {0}".With(extractGeometryCommand.ErrorMessage);
}
errors.Add(message);
}
//input is in different projection - reproject it
if (wkid != 26912)
{
if (srFactory == null)
{
srFactory = new SpatialReferenceEnvironmentClass();
}
var toUtm = srFactory.CreateProjectedCoordinateSystem(26912);
if (container != null)
{
foreach (var points in container.Coordinates)
{
var point = new PointClass
{
X = points[0],
Y = points[1],
SpatialReference = newSpatialRefefence
};
point.Project(toUtm);
if (point.IsEmpty)
{
errors.Add("Input geometry is empty. Check your x and y values.");
return Json(errors);
}
container.Geometry = point;
points[0] = point.X;
points[1] = point.Y;
}
}
}
//buffer point - set container type to polygon
if (bufferInput > 0 && container != null)
{
container.Geometry = CommandExecutor.ExecuteCommand(new BufferGeometryCommand(container, bufferInput));
container.Type = "POLYGON";
}
}
var sdeConnector = SdeConnectorFactory.Create(featureClass);
if (sdeConnector == null)
{
errors.Add("{0} was not found in our database. ".With(featureClass) +
"A valid example would be SGID10.BOUNDARIES.Counties.");
}
if (errors.HasErrors)
{
return Json(errors);
}
// ReSharper disable PossibleNullReferenceException because of returning errors if null
var workspace = sdeConnector.Connect();
// ReSharper restore PossibleNullReferenceException
var featureWorkspace = workspace as IFeatureWorkspace;
if (featureWorkspace == null)
{
errors.Add("Error connecting to SDE.");
return Json(errors);
}
var values = returnValues.Split(',').Select(x => x.Trim()).ToArray();
var commandToExecute = SpatialCommandFactory.Get(container, featureWorkspace, featureClass, values,
predicate, newSpatialRefefence);
var result = CommandExecutor.ExecuteCommand(commandToExecute);
if (!string.IsNullOrEmpty(commandToExecute.ErrorMessage))
{
errors.Add(commandToExecute.ErrorMessage);
return Json(errors);
}
return Json(result);
}
/// <summary>
/// Handles the incoming rest requests
/// </summary>
/// <param name="boundVariables"> The bound variables. </param>
/// <param name="operationInput"> The operation input. </param>
/// <param name="outputFormat"> The output format. </param>
/// <param name="requestProperties"> The request properties. </param>
/// <param name="responseProperties"> The response properties. </param>
/// <returns> </returns>
/// <exception cref="System.ArgumentNullException"></exception>
public static byte[] Handler(NameValueCollection boundVariables, JsonObject operationInput,
string outputFormat, string requestProperties,
out string responseProperties)
{
responseProperties = null;
var errors = new ErrorContainer(400);
var wkid = 26912;
const string featureClass = "SGID10.TRANSPORTATION.UDOTRoutes_LRS";
//pull out all the variables
var x = operationInput.GetNumberValue("x");
var y = operationInput.GetNumberValue("y");
var wkidInput = operationInput.GetNumberValue("wkid", nullable: true);
var bufferInput = operationInput.GetNumberValue("buffer", nullable: true);
var includeRamps = operationInput.GetNumberValue("includeRamps", nullable: true);
ISpatialReference newSpatialRefefence = null;
ISpatialReferenceFactory srFactory = new SpatialReferenceEnvironment();
if (wkidInput > 0)
{
wkid = Convert.ToInt32(wkidInput);
}
if (bufferInput < 1 || bufferInput > 200)
{
bufferInput = 100;
}
//reproject to our data's spatial reference
if (wkid != 26912)
{
var isProjected = true;
try
{
newSpatialRefefence = srFactory.CreateProjectedCoordinateSystem(wkid);
}
catch (ArgumentException)
{
isProjected = false;
}
if (!isProjected)
{
newSpatialRefefence = srFactory.CreateGeographicCoordinateSystem(wkid);
}
}
var utm = srFactory.CreateProjectedCoordinateSystem(26912);
IPoint point = new Point
{
X = x,
Y = y,
SpatialReference = utm
};
//input is in different projection - reproject it
if (wkid != 26912)
{
point = new Point
{
X = x,
Y = y,
SpatialReference = newSpatialRefefence
};
point.Project(utm);
}
var bufferGeometry = CommandExecutor.ExecuteCommand(
new BufferGeometryCommand(new GeometryContainer
{
Geometry = point
}, bufferInput));
var sdeConnector = SdeConnectorFactory.Create(featureClass);
if (sdeConnector == null)
{
errors.Add("{0} was not found in our database. ".With(featureClass) +
"A valid example would be SGID10.BOUNDARIES.Counties.");
}
if (errors.HasErrors)
{
return Json(errors);
}
// ReSharper disable PossibleNullReferenceException because of returning errors if null
var workspace = sdeConnector.Connect();
// ReSharper restore PossibleNullReferenceException
var featureWorkspace = workspace as IFeatureWorkspace;
if (featureWorkspace == null)
{
errors.Add("Error connecting to SDE.");
return Json(errors);
}
var whereClause = "(LABEL LIKE '0%') AND RT_DIR <> 'B'"; //gets rid of ramps, collectors, and federal aid routes
if (includeRamps < 1)
{
whereClause = whereClause.Insert(0, "LEN(LABEL) = 5 AND ");
}
var spatFilter = new SpatialFilterClass
{
SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects,
Geometry = bufferGeometry,
WhereClause = whereClause
};
var lrsFeatureClass = featureWorkspace.OpenFeatureClass(featureClass.Trim());
var fCursor = lrsFeatureClass.Search(spatFilter, true);
var candidates = new TopAndEqualMilepostCandidates(new ClosestMilepostComparer());
IFeature row;
while ((row = fCursor.NextFeature()) != null)
{
var shape = row.ShapeCopy as IPolyline;
if (shape == null)
{
continue;
}
IPoint hitPoint = new Point();
var hitDistance = -1d;
var hitPartIndex = -1;
var hitSegmentIndex = -1;
var increasingSide = false;
var hitTest = shape as IHitTest;
if (hitTest == null)
{
continue;
}
var isHit = hitTest.HitTest(point, bufferInput, esriGeometryHitPartType.esriGeometryPartBoundary, hitPoint,
ref hitDistance, ref hitPartIndex, ref hitSegmentIndex, ref increasingSide);
if (!isHit)
{
continue;
}
var milepost = hitPoint.M;
var distance = GetDistanceBetween(point, hitPoint);
var routeName = CommandExecutor.ExecuteCommand(new GetValueForFieldCommand("LABEL", row.Fields, row));
candidates.Add(new ClosestMilepost(milepost, routeName.ToString(), distance, increasingSide));
Marshal.ReleaseComObject(row);
Marshal.ReleaseComObject(shape);
Marshal.ReleaseComObject(hitPoint);
}
Marshal.ReleaseComObject(lrsFeatureClass);
Marshal.ReleaseComObject(workspace);
Marshal.ReleaseComObject(spatFilter);
return Json(candidates);
}
