async public Task <AppLink> GetAppLinkAsync(string accessToken, string sourceUrl)
{
FacebookClient _client = new FacebookClient(accessToken);
String finalUrl = String.Format("https://graph.facebook.com/v2.0/?ids={0}&type=al&fields=windows,windows_phone,windows_universal", sourceUrl);
dynamic appLinkData = await _client.GetTaskAsync(finalUrl);
List <Target> targets = new List <Target>();
var outerShell = (IDictionary <string, object>)appLinkData[sourceUrl];
if (outerShell.ContainsKey("windows"))
{
var windowsArray = (IEnumerable <object>)outerShell["windows"];
var windowsObject = (IDictionary <string, object>)(windowsArray.First());
targets.Add(new Target {
Uri = (string)windowsObject["url"], Platform = Platform.Windows, Name = (string)windowsObject["app_name"]
});
}
if (outerShell.ContainsKey("windows_phone"))
{
var windowsPhoneArray = (IEnumerable <object>)outerShell["windows_phone"];
var windowsPhoneObject = (IDictionary <string, object>)(windowsPhoneArray.First());
targets.Add(new Target {
Uri = (string)windowsPhoneObject["url"], Platform = Platform.WindowsPhone, Name = (string)windowsPhoneObject["app_name"]
});
}
if (outerShell.ContainsKey("windows_universal"))
{
var universalArray = (IEnumerable <object>)outerShell["windows_universal"];
var universalObject = (IDictionary <string, object>)(universalArray.First());
targets.Add(new Target {
Uri = (string)universalObject["url"], Platform = Platform.Universal, Name = (string)universalObject["app_name"]
});
}
return(new AppLink {
SourceUri = sourceUrl, FallbackUri = sourceUrl, Targets = targets
});
}
internal async Task <FacebookSession> LoginAsync(string permissions, bool force)
{
if (LoginInProgress)
{
throw new InvalidOperationException("Login in progress.");
}
LoginInProgress = true;
try
{
var session = FacebookSessionCacheProvider.Current.GetSessionData();
if (session == null)
{
// Authenticate
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None);
FacebookClient client = new FacebookClient(authResult.AccessToken);
var parameters = new Dictionary <string, object>();
parameters["fields"] = "id";
var result = await client.GetTaskAsync("me", parameters);
var dict = (IDictionary <string, object>)result;
session = new FacebookSession
{
AccessToken = authResult.AccessToken,
Expires = authResult.Expires,
FacebookId = (string)dict["id"],
};
}
else
{
// Check if we are requesting new permissions
bool newPermissions = false;
if (!string.IsNullOrEmpty(permissions))
{
var p = permissions.Split(',');
newPermissions =
session.CurrentPermissions.Join(p, s1 => s1, s2 => s2, (s1, s2) => s1).Count() != p.Length;
}
// Prompt OAuth dialog if force renew is true or
// if new permissions are requested or
// if the access token is expired.
if (force || newPermissions || session.Expires <= DateTime.UtcNow)
{
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None);
if (authResult != null)
{
session.AccessToken = authResult.AccessToken;
session.Expires = authResult.Expires;
}
}
}
// Set the current known permissions
if (!string.IsNullOrEmpty(permissions))
{
var p = permissions.Split(',');
session.CurrentPermissions = session.CurrentPermissions.Union(p).ToList();
}
// Save session data
FacebookSessionCacheProvider.Current.SaveSessionData(session);
}
catch (Exception x)
{
string msg = x.Message;
}
finally
{
LoginInProgress = false;
}
return(CurrentSession);
}