/// <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);
}
}
/// <summary>
/// Create a new quizinfo and adds it to the Quiz DB.
/// A copy is stored in the device quiz roster.
/// </summary>
/// <param name="authorName">Author</param>
/// <param name="quizName">Quiz name</param>
/// <param name="category">Category</param>
public void NewQuizInfo(string authorName, string quizName, string category)
{
QuizInfo newQuizInfo = new QuizInfo(authorName, quizName, category)
{
// Sync status is irrelevant in a Quiz Database's copy of the QuizInfo
SyncStatus = -1
};
this.QuizInfo = newQuizInfo;
Realm realmDB = Realm.GetInstance(App.realmConfiguration(this.dbPath));
realmDB.Write(() =>
{
realmDB.Add(newQuizInfo);
});
QuizInfo rosterCopy = new QuizInfo(newQuizInfo)
{
SyncStatus = (int)SyncStatusEnum.NeedUpload // Default to 1, meaning "needs upload" in roster
};
QuizRosterDatabase.SaveQuizInfo(rosterCopy);
}