/// <summary>
/// Calculate and returns spatial formule
/// </summary>
/// <param name="fieldName">Field name</param>
/// <param name="functionType">Function used in spatial filter</param>
/// <param name="centerPoint">Center point to spatial filter</param>
/// <param name="distance">Distance from center point</param>
/// <returns>Spatial formule</returns>
internal static string GetSpatialFormule(string fieldName, SpatialFunctionType functionType, GeoCoordinate centerPoint, decimal distance)
{
var functionTypeStr = functionType.ToString().ToLower();
var latitude = centerPoint.Latitude.ToString("G", CultureInfo.InvariantCulture);
var longitude = centerPoint.Longitude.ToString("G", CultureInfo.InvariantCulture);
var distanceStr = distance.ToString("G", CultureInfo.InvariantCulture);
return($"{{!{functionTypeStr} sfield={fieldName} pt={latitude},{longitude} d={distanceStr}}}");
}
/// <summary>
/// Create a spatial filter parameter
/// </summary>
/// <param name="documentSearch">Document search engine</param>
/// <param name="conditional">Conditional to add parameter</param>
/// <param name="fieldExpression">Expression used to find field name</param>
/// <param name="functionType">Function used in spatial filter</param>
/// <param name="centerPoint">Center point to spatial filter</param>
/// <param name="distance">Distance from center point</param>
/// <returns>Document search engine</returns>
public static DocumentSearch <TDocument> SpatialFilterIf <TDocument>(this DocumentSearch <TDocument> documentSearch, Func <bool> conditional, Expression <Func <TDocument, object> > fieldExpression, GeoCoordinate centerPoint, decimal distance, SpatialFunctionType functionType = SpatialFunctionType.Bbox)
where TDocument : Document
{
Checker.IsNull(conditional);
if (conditional.Invoke())
{
documentSearch.SpatialFilter(fieldExpression, centerPoint, distance, functionType);
}
return(documentSearch);
}
/// <summary>
/// Create a spatial filter parameter
/// </summary>
/// <param name="documentSearch">Document search engine</param>
/// <param name="fieldExpression">Expression used to find field name</param>
/// <param name="functionType">Function used in spatial filter</param>
/// <param name="centerPoint">Center point to spatial filter</param>
/// <param name="distance">Distance from center point</param>
/// <returns>Document search engine</returns>
public static DocumentSearch <TDocument> SpatialFilter <TDocument>(this DocumentSearch <TDocument> documentSearch, Expression <Func <TDocument, object> > fieldExpression, GeoCoordinate centerPoint, decimal distance, SpatialFunctionType functionType = SpatialFunctionType.Bbox)
where TDocument : Document
{
var parameter = documentSearch.ServiceProvider.GetService <ISpatialFilterParameter <TDocument> >();
parameter.FieldExpression(fieldExpression);
parameter.FunctionType(functionType);
parameter.CenterPoint(centerPoint);
parameter.Distance(distance);
documentSearch.Add(parameter);
return(documentSearch);
}
/// <summary>
/// Configure function used in spatial filter
/// </summary>
/// <param name="parameter">Parameter to configure</param>
/// <param name="functionType">Function used in spatial filter</param>
public static IFacetSpatialParameter <TDocument> FunctionType <TDocument>(this IFacetSpatialParameter <TDocument> parameter, SpatialFunctionType functionType)
where TDocument : Document
{
parameter.FunctionType = functionType;
return(parameter);
}
/// <summary>
/// Configure function used in spatial filter
/// </summary>
/// <param name="parameter">Parameter to configure</param>
/// <param name="value">Function used in spatial filter</param>
public static ISpatialFilterParameter <TDocument> FunctionType <TDocument>(this ISpatialFilterParameter <TDocument> parameter, SpatialFunctionType value)
where TDocument : Document
{
parameter.FunctionType = value;
return(parameter);
}
