/// <summary>
/// Gets a list of groups surrounding the specified geopoint of the specified GroupTypeid
/// If geofenceGroupTypeId is specified, the list of GeoFence groups will be returned with the groups as child groups of that geofence group.
/// </summary>
/// <param name="groupTypeId">The group type identifier.</param>
/// <param name="geoPoint">The geo point.</param>
/// <param name="sortByDistance">if set to <c>true</c> [sort by distance].</param>
/// <param name="maxDistanceMiles">The maximum distance miles.</param>
/// <param name="geofenceGroupTypeId">The geofence group type identifier.</param>
/// <param name="queryOptions">The query options.</param>
/// <returns></returns>
private IQueryable GetByGeoPoint( int groupTypeId, DbGeography geoPoint, bool? sortByDistance, double? maxDistanceMiles, int? geofenceGroupTypeId, System.Web.Http.OData.Query.ODataQueryOptions<Group> queryOptions )
{
var rockContext = (RockContext)Service.Context;
IEnumerable<Group> resultGroups = new List<Group>();
if ( geoPoint != null )
{
if ( geofenceGroupTypeId.HasValue && geofenceGroupTypeId.Value > 0 )
{
var fenceGroups = new List<Group>();
// Find all the groupLocation records ( belonging to groups of the "geofenceGroupType" )
// where the geofence surrounds the location
var groupLocationService = new GroupLocationService( rockContext );
foreach ( var fenceGroupLocation in groupLocationService
.Queryable( "Group,Location" ).AsNoTracking()
.Where( gl =>
gl.Group.GroupTypeId == geofenceGroupTypeId &&
gl.Location.GeoFence != null &&
geoPoint.Intersects( gl.Location.GeoFence ) )
.ToList() )
{
var fenceGroup = fenceGroups.FirstOrDefault( g => g.Id == fenceGroupLocation.GroupId );
if ( fenceGroup == null )
{
fenceGroup = fenceGroupLocation.Group;
fenceGroups.Add( fenceGroup );
}
fenceGroupLocation.Group = null;
// Find all the group groupLocation records ( with group of the "groupTypeId" ) that have a location
// within the fence
foreach ( var group in Service
.Queryable( "Schedule,GroupLocations.Location" ).AsNoTracking()
.Where( g =>
g.GroupTypeId == groupTypeId &&
g.GroupLocations.Any( gl =>
gl.Location.GeoPoint != null &&
gl.Location.GeoPoint.Intersects( fenceGroupLocation.Location.GeoFence ) ) ) )
{
// Remove any other group locations that do not belong to fence
foreach ( var gl in group.GroupLocations.ToList() )
{
if ( gl.Location.GeoPoint == null ||
!gl.Location.GeoPoint.Intersects( fenceGroupLocation.Location.GeoFence ) )
{
group.GroupLocations.Remove( gl );
}
}
fenceGroup.Groups.Add( group );
}
}
resultGroups = fenceGroups;
}
else
{
// if a geoFence is not specified, just get all groups of this group type
resultGroups = Service.Queryable( "Schedule,GroupLocations.Location" ).AsNoTracking().Where( a => a.GroupTypeId == groupTypeId ).Include( a => a.GroupLocations ).ToList();
}
}
// calculate the distance of each of the groups locations from the specified geoFence
foreach ( var group in resultGroups )
{
foreach ( var gl in group.GroupLocations )
{
// Calculate distance
if ( gl.Location.GeoPoint != null )
{
double meters = gl.Location.GeoPoint.Distance( geoPoint ) ?? 0.0D;
gl.Location.SetDistance( meters * Location.MilesPerMeter );
}
}
}
// remove groups that don't have a GeoPoint
resultGroups = resultGroups.Where( a => a.GroupLocations.Any( x => x.Location.GeoPoint != null ) );
// remove groups that don't have a location within the specified radius
if ( maxDistanceMiles.HasValue )
{
resultGroups = resultGroups.Where( a => a.GroupLocations.Any( x => x.Location.Distance <= maxDistanceMiles.Value ) );
}
var querySettings = new System.Web.Http.OData.Query.ODataQuerySettings();
if ( sortByDistance.HasValue && sortByDistance.Value )
{
resultGroups = resultGroups.OrderBy( a => a.GroupLocations.FirstOrDefault() != null ? a.GroupLocations.FirstOrDefault().Location.Distance : int.MaxValue ).ToList();
// if we are sorting by distance, tell OData not to re-sort them by Id
querySettings.EnsureStableOrdering = false;
}
// manually apply any OData parameters to the InMemory Query
var qryResults = queryOptions.ApplyTo( resultGroups.AsQueryable(), querySettings );
return qryResults.AsQueryable();
}
public IEnumerable<Customer> CustomersWithOptions(System.Web.Http.OData.Query.ODataQueryOptions queryOptions)
{
// Process the queryOptions manually; allows extra processing before and after the query is performed
var queryable = _repository.Customers;
var newQueryable = queryOptions.ApplyTo(queryable).Cast<Customer>();
newQueryable = newQueryable.Where(c => c.Country == "Germany");
var list = newQueryable.ToList();
// do something else to the list...
return list;
}