public static double CalculateDistance(Xamarin.Forms.Labs.Services.Geolocation.Position location1, Xamarin.Forms.Labs.Services.Geolocation.Position location2)
{
double circumference = 40000.0; // Earth's circumference at the equator in km
double distance = 0.0;
//Calculate radians
double latitude1Rad = DegreesToRadians(location1.Latitude);
double longitude1Rad = DegreesToRadians(location1.Longitude);
double latititude2Rad = DegreesToRadians(location2.Latitude);
double longitude2Rad = DegreesToRadians(location2.Longitude);
double logitudeDiff = Math.Abs(longitude1Rad - longitude2Rad);
if (logitudeDiff > Math.PI)
{
logitudeDiff = 2.0 * Math.PI - logitudeDiff;
}
double angleCalculation =
Math.Acos(
Math.Sin(latititude2Rad) * Math.Sin(latitude1Rad) +
Math.Cos(latititude2Rad) * Math.Cos(latitude1Rad) * Math.Cos(logitudeDiff));
distance = circumference * angleCalculation / (2.0 * Math.PI);
return(distance);
}
private async void setPinsOnMap(List <Restaurant> rest, Xamarin.Forms.Labs.Services.Geolocation.Position pos2)
{
foreach (Restaurant r in rest)
{
var position = new Position(r.lat, r.lon);
var pos1 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = r.lat,
Longitude = r.lon
};
var distance = Xamarin.Forms.Labs.Services.Geolocation.PositionExtensions.DistanceFrom(pos1, pos2);
var dist = FoodRadarDB.CalculateDistance(pos1, pos2);
//maybe adjust 1000
if (dist > 500)
{
continue;
}
var pin = new Pin
{
Type = PinType.Place,
Position = position,
Label = r.name,
Address = r.address
};
MyMap.Pins.Add(pin);
}
}
private async Task <Xamarin.Forms.Labs.Services.Geolocation.Position> getUserPos()
{
Xamarin.Forms.Labs.Services.Geolocation.Position userPos = new Xamarin.Forms.Labs.Services.Geolocation.Position();
var locator = CrossGeolocator.Current;
locator.DesiredAccuracy = 20;
var position = await locator.GetPositionAsync();
userPos.Latitude = position.Latitude;
userPos.Longitude = position.Longitude;
return(userPos);
}
private async void DibujarMapa_OnClicked(object sender, EventArgs args)
{
var positionsUno = (await(new Geocoder()).GetPositionsForAddressAsync(txtOrigen.Text)).ToList();
if (!positionsUno.Any())
{
lblError.Text = "Origen no existe";
lblError.IsVisible = true;
}
var positionsDos = (await(new Geocoder()).GetPositionsForAddressAsync(txtDestino.Text)).ToList();
if (!positionsDos.Any())
{
lblError.Text = "Destino no existe";
lblError.IsVisible = true;
}
var pos1 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = positionsUno.First().Latitude,
Longitude = positionsUno.First().Longitude
};
var pos2 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = positionsDos.First().Latitude,
Longitude = positionsDos.First().Longitude
};
Gmaps.MoveToRegion(MapSpan.FromCenterAndRadius(positionsUno.First(), Distance.FromMiles(0.1)));
Gmaps.EPins.Add(new PinExtend
{
Name = "Origen",
Location = positionsUno.First(),
Details = txtOrigen.Text
});
Gmaps.EPins.Add(new PinExtend
{
Name = "Destino",
Location = positionsDos.First(),
Details = txtDestino.Text
});
await Gmaps.CreateRoute(positionsUno.First(), positionsDos.First());
}
private async void setPins()
{
//MyMap.MoveToRegion(
// MapSpan.FromCenterAndRadius(new Position(position.Latitude, position.Longitude), new Distance(500)));
MyMap.MoveToRegion(MapSpan.FromCenterAndRadius(new Position(-27.482276, 153.021552), new Distance(500)));
var pos2 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
//Latitude = position.Longitude,
//Longitude = position.Latitude
Latitude = -27.482276,
Longitude = 153.021552
};
setPinsOnMap(App.Database.GetRestaurants().Result, pos2);
}
private async void DibujarMapa_OnClicked(object sender, EventArgs args)
{
var positionsUno = (await (new Geocoder()).GetPositionsForAddressAsync(txtOrigen.Text)).ToList();
if (!positionsUno.Any())
{
lblError.Text = "Origen no existe";
lblError.IsVisible = true;
}
var positionsDos = (await (new Geocoder()).GetPositionsForAddressAsync(txtDestino.Text)).ToList();
if (!positionsDos.Any())
{
lblError.Text = "Destino no existe";
lblError.IsVisible = true;
}
var pos1 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = positionsUno.First().Latitude,
Longitude = positionsUno.First().Longitude
};
var pos2 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = positionsDos.First().Latitude,
Longitude = positionsDos.First().Longitude
};
Gmaps.MoveToRegion(MapSpan.FromCenterAndRadius(positionsUno.First(), Distance.FromMiles(0.1)));
Gmaps.EPins.Add(new PinExtend
{
Name = "Origen",
Location = positionsUno.First(),
Details = txtOrigen.Text
});
Gmaps.EPins.Add(new PinExtend
{
Name = "Destino",
Location = positionsDos.First(),
Details = txtDestino.Text
});
await Gmaps.CreateRoute(positionsUno.First(), positionsDos.First());
}
public async Task <double> GetDistancia(string posUno, string posDos)
{
var positionsUno = (await(new Geocoder()).GetPositionsForAddressAsync(posUno)).ToList();
if (!positionsUno.Any())
{
return(-1.0);
}
var positionsDos = (await(new Geocoder()).GetPositionsForAddressAsync(posDos)).ToList();
if (!positionsDos.Any())
{
return(-1.0);
}
var pos1 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = positionsUno.First().Latitude,
Longitude = positionsUno.First().Longitude
//Latitude = 48.4568664,
//Longitude = 35.0352648
};
var pos2 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = positionsDos.First().Latitude,
Longitude = positionsDos.First().Longitude
//Latitude = 48.3837615903,
//Longitude = 35.0011338294
};
var distance = Xamarin.Forms.Labs.Services.Geolocation.PositionExtensions.DistanceFrom(pos1, pos2);
return(distance);
//System.Diagnostics.Debug.WriteLine(distance);
}
public async Task<double> GetDistancia(string posUno, string posDos)
{
var positionsUno = (await (new Geocoder()).GetPositionsForAddressAsync(posUno)).ToList();
if (!positionsUno.Any())
{
return -1.0;
}
var positionsDos = (await (new Geocoder()).GetPositionsForAddressAsync(posDos)).ToList();
if (!positionsDos.Any())
{
return -1.0;
}
var pos1 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = positionsUno.First().Latitude,
Longitude = positionsUno.First().Longitude
//Latitude = 48.4568664,
//Longitude = 35.0352648
};
var pos2 = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = positionsDos.First().Latitude,
Longitude = positionsDos.First().Longitude
//Latitude = 48.3837615903,
//Longitude = 35.0011338294
};
var distance = Xamarin.Forms.Labs.Services.Geolocation.PositionExtensions.DistanceFrom(pos1, pos2);
return distance;
//System.Diagnostics.Debug.WriteLine(distance);
}
// ALL SEARCH FUNCTIONS *************************************
public List <Meal> SearchMeals(string searchString, Xamarin.Forms.Labs.Services.Geolocation.Position userPos = null, int distanceFilter = 0, int priceFilter = 0)
{
var cuisines = database.Table <Cuisine>().ToListAsync().Result;
Cuisine cuisineResults = database.Table <Cuisine>().Where(i => i.name.ToLower() == searchString.ToLower()).FirstOrDefaultAsync().Result;
List <Meal> mealResults = database.Table <Meal>().Where(i => i.name.ToLower().Contains(searchString.ToLower())).ToListAsync().Result;
List <Meal> meals = new List <Meal>();
var ms = database.Table <Meal>().ToListAsync().Result;
if (cuisineResults != null)
{
meals.AddRange(getMealsByCuisine(cuisineResults.Id));
}
if (mealResults != null)
{
meals.AddRange(mealResults);
}
List <int> mealsToRemove = new List <int>();
if (distanceFilter != 0 && userPos != null)
{
//userPos = getUserPos().Result;
foreach (var m in meals)
{
Restaurant rest = GetRestaurantById(m.restaurantId);
var restPos = new Xamarin.Forms.Labs.Services.Geolocation.Position()
{
Latitude = rest.lat,
Longitude = rest.lon
};
var distance = CalculateDistance(restPos, userPos);
if (distance > (distanceFilter / 1000))
{
mealsToRemove.Add(m.Id);
}
}
foreach (var i in mealsToRemove)
{
meals.RemoveAll(meal => meal.Id == i);
}
}
if (priceFilter != 0)
{
mealsToRemove = new List <int>();
foreach (var m in meals)
{
if (m.price > priceFilter)
{
mealsToRemove.Add(m.Id);
}
}
foreach (var i in mealsToRemove)
{
meals.RemoveAll(meal => meal.Id == i);
}
}
return(meals.OrderByDescending(o => o.rating).ToList());
}
