/// <summary>
/// Subscribes to a quiz given the ID
/// </summary>
/// <param name="dbId">the ID of the quiz to sub to</param>
/// <param name="quizzesSearched">the quizzes currently displayed (used to get info about the quiz from the dbid)</param>
/// <returns>If the subscription was successful</returns>
public static async Task <OperationReturnMessage> SubscribeToQuizAsync(string dbId, List <QuizInfo> quizzesSearched)
{
if (QuizRosterDatabase.GetQuizInfo(dbId) == null) // make sure it isn't in yet
{
OperationReturnMessage returnMessage = await Task.Run(async() => await ServerOperations.SubscribeToQuiz(dbId));
if (returnMessage == OperationReturnMessage.True)
{
QuizInfo quiz = quizzesSearched.Where(quizInfo => quizInfo.DBId == dbId).First();
string lastModifiedDate = await Task.Run(() => ServerOperations.GetLastModifiedDate(dbId));
QuizInfo newInfo = new QuizInfo
{
DBId = quiz.DBId,
AuthorName = quiz.AuthorName,
QuizName = quiz.QuizName,
Category = quiz.Category,
LastModifiedDate = lastModifiedDate,
SyncStatus = (int)SyncStatusEnum.NotDownloadedAndNeedDownload // 4 to represent not present in local directory and need download
};
QuizRosterDatabase.SaveQuizInfo(newInfo);
return(returnMessage);
}
else if (returnMessage == OperationReturnMessage.FalseInvalidCredentials)
{
CredentialManager.IsLoggedIn = false;
return(returnMessage);
}
else
{
return(returnMessage);
}
}
else
{
return(OperationReturnMessage.False);
}
}