/// <summary>
/// The function calculates the walking time duration in minutes from the user's location to the specific shelter.
/// </summary>
/// <param name="shelter"></param>
/// <param name="lat"></param>
/// <param name="lng"></param>
/// <returns></returns>
public static int GetDurationOfShelter(ShelterDTO shelter, double lat, double lng)
{
string shelterAddress = shelter.City + "%20" + shelter.ShelterStreet + "%20" + shelter.StreetNumber;
string source = lat + "," + lng;
string url = "https://maps.googleapis.com/maps/api/distancematrix/json?units=imperial&origins="
+ source + "&destinations=" + shelterAddress + "&mode=walking" + "&key=your key";
WebRequest request = WebRequest.Create(url);
WebResponse response = request.GetResponse();
Stream data = response.GetResponseStream();
StreamReader reader = new StreamReader(data);
string responseFromServer = reader.ReadToEnd();
JObject results = JObject.Parse(responseFromServer);
int seconds = Convert.ToInt32(results["rows"].First["elements"].First["duration"]["value"]);
double tmp = (double)seconds / 60;
int minDuration;
if (seconds / 60 != tmp)
{
minDuration = seconds / 60 + 1;
}
else
{
minDuration = seconds / 60;
}
reader.Close();
data.Close();
response.Close();
return(minDuration);
}
/// <summary>
/// The function returns a list of the three nearest shelters according to the duration of each shelter that returns from the function GetDurationOfShelter(...)
/// </summary>
/// <param name="city"></param>
/// <param name="lat"></param>
/// <param name="lng"></param>
/// <returns></returns>
public static List <ShelterDTO> GetNearestShelter(double lat, double lng)
{
int minDuration2 = 0;
int minDuration3 = 0;
List <ShelterDTO> nearestShelters = new List <ShelterDTO>();
ShelterDTO nearestShelter = new ShelterDTO();
ShelterDTO nearestShelter2 = new ShelterDTO();
ShelterDTO nearestShelter3 = new ShelterDTO();
List <ShelterDTO> allSheltersDTO = GetAllShelters();
var lowDuration = 1000;
foreach (var shelter in allSheltersDTO)
{
var minDuration = GetDurationOfShelter(shelter, lat, lng);
if (minDuration < lowDuration)
{
minDuration3 = minDuration2;
minDuration2 = lowDuration;
lowDuration = minDuration;
nearestShelter3 = nearestShelter2;
nearestShelter2 = nearestShelter;
nearestShelter = shelter;
nearestShelter.DurationValue = lowDuration;
}
else
{
if (minDuration < minDuration2)
{
minDuration3 = minDuration2;
minDuration2 = minDuration;
nearestShelter3 = nearestShelter2;
nearestShelter2 = shelter;
nearestShelter2.DurationValue = minDuration2;
}
else
{
if (minDuration < minDuration3)
{
minDuration3 = minDuration;
nearestShelter3 = shelter;
nearestShelter3.DurationValue = minDuration3;
}
}
}
}
nearestShelters.Add(nearestShelter);
nearestShelters.Add(nearestShelter2);
nearestShelters.Add(nearestShelter3);
return(nearestShelters);
}
public static ShelterDTO UpdateShelter(ShelterDTO updatedShelter, ref string message)
{
DAL.Shelter shelterToUpdate = db.Shelters.FirstOrDefault(s => s.ShelterKey == updatedShelter.ShelterKey);
if (shelterToUpdate == null)
{
message = "לא נמצא מקלט מבוקש";
return(null);
}
else
{
shelterToUpdate.City = updatedShelter.City;
shelterToUpdate.ShelterStreet = updatedShelter.ShelterStreet;
shelterToUpdate.StreetNumber = updatedShelter.StreetNumber;
shelterToUpdate.MaxPeople = updatedShelter.MaxPeople;
shelterToUpdate.ShelterDescription = updatedShelter.ShelterDescription;
db.SaveChanges();
}
return(updatedShelter);
}
public IHttpActionResult AddShelter(ShelterDTO newShelter)
{
string message = "";
ShelterDTO addShelter = ShelterLogic.AddNewShelter(newShelter, ref message);
if (addShelter != null)
{
return(Ok(addShelter));
}
if (message != "")
{
return(BadRequest(message));
}
var error = new
{
message = "ההוספה נכשלה"
};
return(Content(HttpStatusCode.BadRequest, error));
}
public IHttpActionResult UpdateShelter(ShelterDTO updatedShelter)
{
string message = "";
ShelterDTO updateShelter = ShelterLogic.UpdateShelter(updatedShelter, ref message);
if (updateShelter != null)
{
return(Ok(updateShelter));
}
if (message != "")
{
return(BadRequest(message));
}
var error = new
{
message = "העדכון נכשל"
};
return(Content(HttpStatusCode.BadRequest, error));
}
public static ShelterDTO AddNewShelter(ShelterDTO newShelter, ref string message)
{
//DAL.Shelter ifCityExists = db.Shelters.FirstOrDefault(s => s.City == newShelter.City);
//DAL.Shelter ifStreetExists = db.Shelters.FirstOrDefault(s => s.ShelterStreet == newShelter.ShelterStreet);
//DAL.Shelter ifStreetNumberExists = db.Shelters.FirstOrDefault(s => s.StreetNumber == newShelter.StreetNumber);
bool ifExists = false;
foreach (var shelter in db.Shelters)
{
if (shelter.City == newShelter.City)
{
if (shelter.ShelterStreet == newShelter.ShelterStreet)
{
if (shelter.StreetNumber == newShelter.StreetNumber)
{
ifExists = true;
break;
}
}
}
}
if (ifExists)
{
message = "מקלט זה קיים במערכת";
return(null);
}
DAL.Shelter shelterDAL = ShelterDTO.DtoToDAL(newShelter);
db.Shelters.Add(shelterDAL);
try
{
db.SaveChanges();
return(newShelter);
}
catch (Exception ex)
{
return(null);
}
}
public static ShelterDTO AddNewShelter(ShelterDTO newShelter, ref string message)
{
return(DTO.ShelterDTO.AddNewShelter(newShelter, ref message));
}
