//Transformacija iz base klase u derived klasu
public Restoran(Venue v)
{
this.Naziv = v.Naziv;
this.fourSqaureId = v.fourSqaureId;
this.Opis = v.Opis;
this.Slika = v.Slika;
this.Telefon = v.Telefon;
this.GeoSirina = v.GeoSirina;
this.GeoDuzina = v.GeoDuzina;
this.Rating = v.Rating/2;
this.Adresa = v.Adresa;
}
//glavni poziv koji pozove Rest Upit da se dobiju svi venues oko lat,lng
//i pretvore u listu venues
public async Task getVenus(double latitude, double longitude)
{
Venues = new List<Venue>();
//pozvati rest upit
HttpClient httpClient = new HttpClient();
string uriString = "https://api.foursquare.com/v2/venues/search?ll=" + latitude + "," + longitude + "&query=restaurant&oauth_token=" + oAuthToken + "&v=20160410";
string response = await httpClient.GetStringAsync(new Uri(uriString));
//response je string koji se konvertuje u JsonObject
JsonObject value = JsonValue.Parse(response).GetObject();
//Sad je potrebno parsirati taj objekat
//Pratiti izgled response u dokumentaciji i polje po polje parsirati
//osjetljiv dio koda posto servisi imaju obicaj da promjene nazive polja
JsonObject responseVenus = value.GetNamedObject("response");
JsonArray jsonVenus = responseVenus.GetNamedArray("venues");
for (uint i = 0; i < jsonVenus.Count; i++)
{
JsonObject contact = jsonVenus.GetObjectAt(i).GetNamedObject("contact");
JsonObject location = jsonVenus.GetObjectAt(i).GetNamedObject("location");
Venue ven = new Venue();
ven.fourSqaureId = jsonVenus.GetObjectAt(i).GetNamedString("id");
IJsonValue jsonValue;
//neke vrijednosti mozda ne postoje u tom slucaju ne mogu se ni postaviti
if (jsonVenus.GetObjectAt(i).TryGetValue("name", out jsonValue))
{
ven.Naziv = jsonValue.GetString();
}
if (jsonVenus.GetObjectAt(i).TryGetValue("phone", out jsonValue))
{
ven.Telefon = jsonValue.GetString();
}
if (jsonVenus.GetObjectAt(i).TryGetValue("lat", out jsonValue))
{
ven.GeoSirina = jsonValue.GetNumber();
}
if (jsonVenus.GetObjectAt(i).TryGetValue("lng", out jsonValue))
{
ven.GeoDuzina = jsonValue.GetNumber();
}
if (jsonVenus.GetObjectAt(i).TryGetValue("address", out jsonValue))
{
ven.Adresa = jsonValue.GetString();
}
Venues.Add(ven);
}
}
//posto lista ne vrati sve podatke u venue, ostali podaci Slika, Opis Rating se moraju naknadno dodati
public async Task updateVenueDetailed(Venue v,Action callback)
{
//ako je vec updated nemoj opet
if (!v.Detailed)
{
Venues = new List<Venue>();
//opet rest poziv
HttpClient httpClient = new HttpClient();
string uriString = "https://api.foursquare.com/v2/venues/" + v.fourSqaureId + "?oauth_token=" + oAuthToken + "&v=20160410";
string response = await httpClient.GetStringAsync(new Uri(uriString));
//pa parsiranje
JsonObject value = JsonValue.Parse(response).GetObject();
JsonObject responseVenue = value.GetNamedObject("response");
JsonObject venue = responseVenue.GetNamedObject("venue");
IJsonValue jsonValue;
if (venue.TryGetValue("rating", out jsonValue))
{
v.Rating = jsonValue.GetNumber()/2;
}
JsonObject tips = venue.GetNamedObject("tips");
JsonArray tipGroups = tips.GetNamedArray("groups");
if (tipGroups.Count > 0)
{
jsonValue = tipGroups.Last();
JsonObject tip = jsonValue.GetObject();
JsonArray tipItems = tip.GetNamedArray("items");
if (tipItems.Count > 0)
{
v.Opis = tipItems.GetObjectAt(0).GetNamedString("text");
}
}
if (venue.TryGetValue("bestPhoto", out jsonValue))
{
JsonObject bestPhoto = jsonValue.GetObject();
string prefix = bestPhoto.GetNamedString("prefix");
string suffix = bestPhoto.GetNamedString("suffix");
v.Slika = prefix + defaultPictureWidth + "x" + defaultPictureHeight + suffix;
}
else
{
//else iskopati sliku iz liste svih slika
}
v.Detailed = true;
}
//posto je funkcija async i cesto ce imati i delay ovisno o konekciji
//u callback se stavi funkcija (izmjeni gui npr) koja se poziva kada async zavrsi
callback();
}
