// Returns the number of webcams that can see us at our current location.
// Is this method doing too much?
public int ProcessGeoMarker(IGeoMarker geoMarker)
{
// Add the GeoMarker to the database and get the ID.
var geoMarkerId = _location.AppendGeoMarker(geoMarker);
// Get the list of webcams that we might be able to see us at our current location.
var webCamsWithinWebCamRadiusOfVisibility =
_location.GetWebCamsWithinWebCamRadiusOfVisibility(new Point
{
XCoord = geoMarker.XCoord,
YCoord = geoMarker.YCoord
});
// If there are any webcams that can see us...
if (webCamsWithinWebCamRadiusOfVisibility.Count > 0)
{
foreach (var webCam in webCamsWithinWebCamRadiusOfVisibility)
{
using (var trans = new TransactionScope())
{
// Capture and add the image to the DB.
// Future modification - only capture an image if one has not been recently (within seconds) captured for that webcam.
// Future modification - remove this internal dependency on WebCamImage (make a factory?).
// Future modification - remove this internal dependency on AwsStorageServiceAgent (could be done using the IoC container?).
_webCamControl.WebCam = webCam;
_webCamControl.WebCamImage = new WebCamImage();
_webCamControl.CaptureCurrentImage(new WebCamDataRequest());
_webCamControl.CapturedImage = new CapturedImage();
var capturedImageId = _webCamControl.StoreCapturedImage();
// Map the image to the GeoMarker
// Refactor this method so that it takes a complex type, rather than two primitives.
_location.MapCapturedImageToGeoMarker(capturedImageId, geoMarkerId);
// commit the change
trans.Complete();
}
}
}
// Return the count of images collected.
return webCamsWithinWebCamRadiusOfVisibility.Count;
}
public IWebCamExtendedInfo GetNearestWebCam(IGeoMarker geoMarker)
{
// Generate distances for all camera locations from this point
var webCamsWithDistanceFromGeoMarker =
from webCam in _myBigBroRepository.Set<Infostructure.MyBigBro.DataModel.Models.WebCam>()
select new WebCamExtendedInfo
{
//_geometry.GetDistancePythagoras(webCam.XCoord, webCam.YCoord, geoMarker.XCoord, geoMarker.YCoord)
Distance = SqlFunctions.SquareRoot(SqlFunctions.Square(webCam.XCoord - geoMarker.XCoord) + SqlFunctions.Square(webCam.YCoord - geoMarker.YCoord)).Value,
Id = webCam.Id,
Name = webCam.Name,
RadiusOfVisibility = webCam.RadiusOfVisibility,
XCoord = webCam.XCoord,
YCoord = webCam.YCoord,
Url = webCam.Url
};
// Get the min distance
var minDistance = webCamsWithDistanceFromGeoMarker.Min(cam => cam.Distance);
// Select the camera with mon distance
var webCamWithMinDistanceFromGeoMarker =
from webCam in webCamsWithDistanceFromGeoMarker
where webCam.Distance == minDistance
select webCam;
// Return it
return webCamWithMinDistanceFromGeoMarker.First();
}
public IEnumerable<IWebCamExtendedInfo> GetNearestWebCams(int top, IGeoMarker geoMarker)
{
// Generate distances for all camera locations from this point
// Need to do this using a loop as LINQ won't accept the "GetDistancePythagoras" otherwise.
var webCamsWithDistanceFromGeoMarker = new List<WebCamExtendedInfo>();
foreach (var webCam in _myBigBroRepository.Set<Infostructure.MyBigBro.DataModel.Models.WebCam>())
{
webCamsWithDistanceFromGeoMarker.Add(new WebCamExtendedInfo()
{
Distance = _geometry.GetDistancePythagoras(webCam.XCoord, webCam.YCoord, geoMarker.XCoord, geoMarker.YCoord),
//Distance = SqlFunctions.SquareRoot(SqlFunctions.Square(webCam.XCoord - geoMarker.XCoord) + SqlFunctions.Square(webCam.YCoord - geoMarker.YCoord)).Value,
Id = webCam.Id,
Name = webCam.Name,
RadiusOfVisibility = webCam.RadiusOfVisibility,
XCoord = webCam.XCoord,
YCoord = webCam.YCoord,
Url = webCam.Url
});
}
// Get the min distance
var minDistance = webCamsWithDistanceFromGeoMarker.Min(cam => cam.Distance);
// Select the camera with mon distance
var webCamWithMinDistanceFromGeoMarker =
from webCam in webCamsWithDistanceFromGeoMarker
orderby webCam.Distance
select webCam;
// Return it
return webCamWithMinDistanceFromGeoMarker.Take(top);
}
public int AppendGeoMarker(IGeoMarker geoMarker)
{
_myBigBroRepository.Add<GeoMarker>((GeoMarker)geoMarker);
_myBigBroRepository.SaveChanges();
return geoMarker.Id;
}
