private List <ScanModel> GetNearbyScans(ScanModel scan)
{
var builder = new FilterDefinitionBuilder <ScanModel>();
var filter = builder.Near(S => S.Kinematics.Location, scan.Kinematics.Location, minDistance: 0.0, maxDistance: DistanceThreshold);
var nearby_scans = m_scanCollection.Find(filter).ToList();
return(nearby_scans);
}
public async Task <PDVEntity> GetNearst(double longt, double lat)
{
var coord = new GeoJson2DCoordinates(longt, lat);
var geo = new GeoJsonPoint <GeoJson2DCoordinates>(coord);
var filterBuiler = new FilterDefinitionBuilder <PDVEntity>();
var filterInAreas = filterBuiler.GeoIntersects(p => p.coverageArea, geo);
var filterNear = filterBuiler.Near(p => p.address, geo);
var filter = filterBuiler.And(filterInAreas, filterNear);
var collection = Context.GetCollection <PDVEntity>(TypeName);
var indexKey = new IndexKeysDefinitionBuilder <PDVEntity>().Geo2DSphere(p => p.address);
var index = new CreateIndexModel <PDVEntity>(indexKey);
collection.Indexes.CreateOne(index);
var list = await Context.GetCollection <PDVEntity>(TypeName).FindAsync(filter);
return(list.FirstOrDefault());
}
public static FilterDefinition <RestaurantEntity> GetSearchFilter(Dictionary <string, string> QueryParameters)
{
FilterDefinition <RestaurantEntity> searchFilter;
if (QueryParameters.Count == 0)
{
BsonDocument nofilter = new BsonDocument();
return(nofilter);
}
searchFilter = Builders <RestaurantEntity> .Filter.Where(x => x.Name != null);
var filter = Builders <RestaurantEntity> .Filter;
var searchTags = new List <string>();
int distanceInMeter = 1000;
int minDistanceinMeter = 0;
double latitude = 0;
double longitude = 0;
foreach (var param in QueryParameters)
{
if (param.Key == "value" && CheckValue(typeof(string), param.Value))
{
var array = param.Value.ToLower().Trim().Split(',');
if (array.Length == 1 && array[0] != String.Empty)
{
searchTags.AddRange(array);
searchFilter &= filter.In("SearchTags", searchTags);
}
}
else if (param.Key == "costupperlimit" && CheckValue(typeof(int), Convert.ToInt32(param.Value)))
{
searchFilter &= filter.Where(x => x.CostUpperLimit <= Convert.ToInt32(param.Value));
}
else if (param.Key == "costlowerlimit" && CheckValue(typeof(int), Convert.ToInt32(param.Value)))
{
searchFilter &= filter.Where(x => x.CostLowerLimit >= Convert.ToInt32(param.Value));
}
else if (param.Key == "lat" && CheckValue(typeof(double), Convert.ToDouble(param.Value)))
{
latitude = Convert.ToDouble(param.Value);
}
else if (param.Key == "lon" && CheckValue(typeof(double), Convert.ToDouble(param.Value)))
{
longitude = Convert.ToDouble(param.Value);
}
else if (param.Key == "distance" && CheckValue(typeof(int), Convert.ToInt32(param.Value)))
{
distanceInMeter = Convert.ToInt32(param.Value);
}
}
//FIXME : someday, i m gonna come to this segment and find out a way to query text and geonear together
if (latitude != 0 && longitude != 0)
{
GeoJsonPoint <GeoJson2DGeographicCoordinates> Point = new GeoJsonPoint <GeoJson2DGeographicCoordinates>(new GeoJson2DGeographicCoordinates(longitude, latitude));
FilterDefinitionBuilder <RestaurantEntity> builder = new FilterDefinitionBuilder <RestaurantEntity>();
searchFilter &= builder.Near <GeoJson2DGeographicCoordinates>(x => x.GeoPoint, Point, distanceInMeter);
}
return(searchFilter);
}
public async Task <TrainingPosition> GetRandomAsync(string type)
{
double x = rnd.NextDouble();
double y = rnd.NextDouble();
FilterDefinitionBuilder <TrainingPosition> filterBuilder = Builders <TrainingPosition> .Filter;
FilterDefinition <TrainingPosition> filter = filterBuilder.Eq("type", type) & filterBuilder.Near("location", x, y);
var found = positionCollection.Find(filter);
if (found == null)
{
return(null);
}
else
{
return(await found.Limit(1).FirstAsync());
}
}
//
// 摘要:
// Tests that the value of the named element is near some location (see $near and
// $nearSphere).
//
// 参数:
// name:
// The name of the element to test.
//
// x:
// The x value of the origin.
//
// y:
// The y value of the origin.
//
// maxDistance:
// The max distance for a document to be included in the results.
//
// spherical:
// Whether to do a spherical search.
//
// 返回结果:
// The builder (so method calls can be chained).
public static FilterDefinition <BsonDocument> Near(string name, double x, double y, double maxDistance, bool spherical)
{
return(filter.Near(name, x, y, maxDistance));
}