public async Task<IHttpActionResult> PutPointOfInterest(int id, PointOfInterest pointOfInterest)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
if (id != pointOfInterest.PointOfInterestId)
{
return BadRequest();
}
db.Entry(pointOfInterest).State = EntityState.Modified;
try
{
await db.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!PointOfInterestExists(id))
{
return NotFound();
}
else
{
throw;
}
}
return StatusCode(HttpStatusCode.NoContent);
}
public async Task<IHttpActionResult> PostPointOfInterest(PointOfInterest pointOfInterest)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
db.PointOfInterests.Add(pointOfInterest);
await db.SaveChangesAsync();
return CreatedAtRoute("DefaultApi", new { id = pointOfInterest.PointOfInterestId }, pointOfInterest);
}
// !!!! HELPER FUNCTIONS !!!!
public List<PointOfInterest> getPlaces(Location start, int timeInMinutes)
{
//create query
//build ("https://maps.googleapis.com/maps/api/place/nearbysearch/output?" + parameters)
//OR (less data)
string URI = "https://maps.googleapis.com/maps/api/place/radarsearch/json?";
//add parameters
//key
URI += "key=" + (new Secrets()).GoogleAPIServerKey + "&";
//location
URI += "location=" + start.latitude.ToString() + "," + start.longitude.ToString() + "&";
//radius; estimate 1 meter per second walking speed
URI += "radius=" + (timeInMinutes * 60 / 2).ToString() + "&";
//types; start with "park" and possibly add more later
//see https://developers.google.com/places/supported_types for list of types
URI += "types=park";
//create a new, empty list of Points Of Interest
List<PointOfInterest> candidatePoIs = new List<PointOfInterest>();
//request processing
var googleRadarObject = JToken.Parse(callAPIgetJSon(URI));
var status = googleRadarObject.Children<JProperty>().FirstOrDefault(x => x.Name == "status").Value;
if (status.ToString() == "OK")
{
var resultsArray = googleRadarObject.Children<JProperty>().FirstOrDefault(x => x.Name == "results").Value;
//iterate over the json and parse into PointsOfInterest, placing each in the list
foreach (var item in resultsArray)
{
//extract the google place id
string GooglePlaceId = item.Children<JProperty>().FirstOrDefault(x => x.Name == "place_id").Value.ToString();
//extract the lattitude from JSon structuret
decimal lat = decimal.Parse(
item.Children<JProperty>().FirstOrDefault(x => x.Name == "geometry").Value.
Children<JProperty>().FirstOrDefault(x => x.Name == "location").Value.
Children<JProperty>().FirstOrDefault(x => x.Name == "lat").Value.ToString());
//extract the longitude from JSon structure
decimal lng = decimal.Parse(
item.Children<JProperty>().FirstOrDefault(x => x.Name == "geometry").Value.
Children<JProperty>().FirstOrDefault(x => x.Name == "location").Value.
Children<JProperty>().FirstOrDefault(x => x.Name == "lng").Value.ToString());
//create new PoI with above properties
PointOfInterest point = new PointOfInterest(lat, lng, GooglePlaceId);
//add it to the list of candidates
candidatePoIs.Add(point);
}
}
//return processed list
return candidatePoIs;
}
