public void CheckFollowState()
{
if (GlobalVariables.UserOnline)
{
ViewModel.FollowButtonVisibility = true;
var followStateRequest = new GetUserArtistRelationStoreRequest(ArtistID);
followStateRequest.ProcessSuccessfully += (reply) =>
Dispatcher.BeginInvoke((Action)delegate
{
ViewModel.FollowState = (reply.user_relation.rel == UserRelationReply.Rel.FOLLOW);
});
followStateRequest.ProcessError += (reply, msg) =>
{
Debug.Assert(false, msg + reply.type);
Dispatcher.BeginInvoke((Action)(() => StaticMainWindow.Window.ShowErrorScreen()));
};
GlobalVariables.StoreWorker.ForceAddRequest(followStateRequest);
}
}
public object Process()
{
var relationRequest = new GetUserArtistRelationStoreRequest(ArtistID);
var relationReply = (Reply)relationRequest.Process();
if (relationReply.type != (decimal)Reply.Type.OK)
{
OnProcessError((Reply.Type)relationReply.type, "Get user-artist relationship failed");
return null;
}
bool isFollow = (relationReply.user_relation.rel == UserRelationReply.Rel.FOLLOW);
var followRequest = isFollow
? new FollowStoreRequest(FollowRequest.Type.UNFOLLOW, ArtistID)
: new FollowStoreRequest(FollowRequest.Type.FOLLOW, ArtistID);
var followReply = (Reply)followRequest.Process();
if (followReply.type != (decimal)Reply.Type.OK)
{
OnProcessError((Reply.Type)followReply.type, "Follow artist request failed");
return null;
}
OnProcessSuccessfully(isFollow);
return null;
}