/// <summary>
/// Server refresh and check on every 10 seconds. Iterates through the database and adds and then deletes to update
/// the instructors queue.
/// </summary>
/// <param name="sender"></param> Sender of the event
/// <param name="e"></param> The event
private async void ServerTimer_Tick(object sender, EventArgs e)
{
FirebaseResponse retrieveQuestions = await client.GetAsync("Question Information/" + _username);
QuestionInformation quesData = retrieveQuestions.ResultAs <QuestionInformation>();
//Call a helper to get all of the student usernames and place each one in a queue
if (quesData != null)
{
Stack <string> questions = GetQuestion(quesData.question);
Stack <string> passQuestions = new Stack <string>();
if (_isInstructor)
{
while (questions.Count > 0)
{
if (questions.Peek() == string.Empty)
{
questions.Pop();
}
else
{
queue.AddQuestion(passQuestions.Pop(), quesData.IP, quesData.username);
}
}
uxQuestionCount.Text = "# of Questions: " + queue.Count.ToString();
FirebaseResponse delete = await client.DeleteAsync("Question Information/" + _username);
}
else if (!_isInstructor)
{
// queue = queue stored in the cloud
}
} //changes
}
private Stack <string> GetQuestion(string username)
{
FirebaseResponse retrieve = client.Get("Question Information/" + username);
QuestionInformation quesData = retrieve.ResultAs <QuestionInformation>();
Stack <string> userinfo = new Stack <string>();
userinfo.Push(quesData.question);
return(userinfo);
}
/// <summary>
/// Click event for the submit button. Adds a new string to construct a new QuestionItem from the cloud.
/// </summary>
/// <param name="sender"></param> Sender of the event
/// <param name="e"></param> The event
private async void UxSubmit_Click(object sender, EventArgs e)
{
var questionInfo = new QuestionInformation
{
username = _username,
question = uxInputQuestion.Text,
IP = GetLocalIP(),
Count = _count++
};
SetResponse queueInfo = await client.SetAsync("Question Information/" + questionInfo.question, questionInfo);
uxChatBox.Text += ("-- QUESTION ADDED --\r\n");
}
