/********************************************************************************************************/
/********************************PRIVATE*HELPER*METHODS**************************************************/
/********************************************************************************************************/
// create form for http request using the given spotify token parameters
private static List <KeyValuePair <string, string> > InitializeAccessForm(SpotifyTokenParams spotifyTokenParams)
{
var postData = new List <KeyValuePair <string, string> >
{
new KeyValuePair <string, string>("grant_type", "authorization_code"),
new KeyValuePair <string, string>("code", spotifyTokenParams.Code),
new KeyValuePair <string, string>("redirect_uri", spotifyTokenParams.RedirectUri),
new KeyValuePair <string, string>("client_id", Constants.CLIENT_ID),
new KeyValuePair <string, string>("client_secret", Constants.CLIENT_SECRET)
};
return(postData);
}
public async Task <IActionResult> SpotifyToken([FromBody] SpotifyTokenParams spotifyTokenParams)
{
using (var client = new HttpClient())
{
var postData = InitializeAccessForm(spotifyTokenParams);
using (var content = new FormUrlEncodedContent(postData))
{
client.BaseAddress = new Uri(Constants.BASE_ADDRESS_ACCOUNTS);
content.Headers.Clear();
content.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
HttpResponseMessage response = await client.PostAsync("api/token", content);
// if we received a token from the spotify accounts service, convert that into our Dto model
if (response.IsSuccessStatusCode)
{
var responseString = await response.Content.ReadAsStringAsync();
var spotifyConnectionData =
Newtonsoft.Json.JsonConvert.DeserializeObject <SpotifyConnectionDataDto>(responseString);
if (spotifyConnectionData == null)
{
throw new Exception("Bad initial request for access token");
}
var jsonResponse = await _userRepository.GetUserInfo(spotifyConnectionData);
if (jsonResponse == null)
{
throw new Exception("Failure to retrieve user info from spotify api");
}
// if the user is not in our database, create a new user for the app, otherwise,
// return the existing user
var existingUser = _userRepository.UserExists((string)jsonResponse["id"]);
if (existingUser == null)
{
var newUser = (await _userRepository.AddNewUser(spotifyConnectionData))
.Match(
some: nu => nu,
none: () => null
);
if (newUser != null)
{
var innerUserDto = new UserDto {
SpotifyId = newUser.SpotifyId
};
return(Ok(Json(JObject.Parse(JsonConvert.SerializeObject(innerUserDto)))));
}
return(BadRequest());
}
// if the user scope has changed
if (existingUser.Scope != spotifyTokenParams.Scope)
{
existingUser = _userRepository.UpdateUserWithNewScope(existingUser, spotifyConnectionData, spotifyTokenParams.Scope);
}
var userDto = new UserDto {
SpotifyId = existingUser.SpotifyId
};
return(Ok(Json(JObject.Parse(JsonConvert.SerializeObject(userDto)))));
}
return(BadRequest());
}
}
}
