private static (Operation operation, OperationMxProcessing operationPrescription) BuildTheGeoJsonOutput(RuleResult collectRuleResult, List <Value> values, Operation buildGeoJsonOperation = null)
{
var cityCount = values.Count;
// Build the Javascript template for creating the entire GeoJSON Value
var valueBody = "{\"type\":\"FeatureCollection\",\"features\":[";
for (var ix = 0; ix < cityCount; ix++)
{
if (ix > 0)
{
valueBody += ",";
}
valueBody += $"${{{ix}}}";
}
valueBody += "]}";
var valueTemplate = $"{{JSON.parse('{valueBody}')}}";
// Add an Operation to reference the collect Rule and merge all of the results into one GeoJSON
if (buildGeoJsonOperation == null)
{
var opKey = values.OperandKey(EntityType.Value);
buildGeoJsonOperation = collectRuleResult.CreateUpdateOperation(new[] { opKey }, GuidHelpers.NewTimeUuid(), valueTemplate);
}
else
{
var opKey = values.OperandKey(EntityType.Value, buildGeoJsonOperation.Operands[0].EntityId);
buildGeoJsonOperation =
buildGeoJsonOperation.RecreateUpdateOperation(collectRuleResult, new[] { opKey }, valueTemplate);
}
var buildGeoJsonPrescription = buildGeoJsonOperation.AddUpdate();
return(buildGeoJsonOperation, buildGeoJsonPrescription);
}
