/// <summary>
/// Gets (from Facebook API) and sets (in to CurrentUser) info about the user
/// (i.e Name and FB User ID) from a Facebook API call
/// </summary>
/// <param name="callbackResult">Result of a FB API Call for ("/me")</param>
private static void UserInfoCallback(IGraphResult callbackResult)
{
//Create a dictonary of the result that we got back from the API Call
Dictionary <string, object> callbackResultsDictionary =
(Dictionary <string, object>)Facebook.MiniJSON.Json.Deserialize(callbackResult.RawResult);
//Check that we have got the right call back (i.e it contains a key for name and user ID)
if (!callbackResultsDictionary.ContainsKey("name") || !callbackResultsDictionary.ContainsKey("id"))
{
Debug.LogWarning("UserInfoCallback was called with the wrong call back info");
//Trigger Event for unsuccessful login and log out the current user
FBLoginEvent?.Invoke(LoginEventResult.LoginFailed);
FacebookLogout();
return;
}
//We get the name and userID back from our API call. (Name: "", userID: "")
//we need to put this in our user info class
CurrentUser = new FBUserInfo((string)callbackResultsDictionary["name"],
Convert.ToInt64(callbackResultsDictionary["id"]));
//Trigger event for successful logon
FBLoginEvent?.Invoke(LoginEventResult.LoginSuccess);
}
/// <summary>
/// Log out of Facebook account
/// </summary>
public static void FacebookLogout()
{
//Don't allow logout with uninitalised facebook
if (!FB.IsInitialized || !IsUserLoggedIn)
{
return;
}
//Null out logged in user info
CurrentUser = null;
//Logout of facebook and call event
FB.LogOut();
FBLoginEvent?.Invoke(LoginEventResult.Logout);
}
/// <summary>
/// Login in to Facebook account
/// </summary>
public static void FacebookLogin()
{
//Don't allow login with uninitalised facebook
if (!FB.IsInitialized)
{
Debug.LogError("Could not login to facebook as it has not been initalised");
FBLoginEvent?.Invoke(LoginEventResult.LoginFailed);
return;
}
if (!IsUserLoggedIn)
{
//Login to facebook with permissions
FB.LogInWithReadPermissions(FBPermissions, LoginCallback);
}
}
/// <summary>
/// Callback function for login from facebook
/// </summary>
/// <param name="result">Result of the login</param>
private static void LoginCallback(ILoginResult result)
{
//If login is cancelled or there was an error then don't save info
if (result.Cancelled || result.Error != null)
{
CurrentUser = null;
Debug.LogWarning("Did not login to facebook");
FBLoginEvent?.Invoke(LoginEventResult.LoginFailed);
//Log out incase there is a cached user logged in
FacebookLogout();
return;
}
//Get the info about the logged in user, that is name and FB user ID
FB.API("/me", HttpMethod.GET, UserInfoCallback);
}