/// <summary>
/// Gets a specified chunk of the levels on the server by a given author
/// </summary>
/// <param name="username">User to get levels from</param>
/// <param name="chunk">chunk of levels to get</param>
/// <returns>The chunk requested</returns>
public static List <QuizInfo> GetQuizzesByAuthorChunked(string username = "******", int chunk = 1)
{
List <string[]> quizDatas = ServerOperations.GetQuizzesByAuthorName(username, chunk);
return(ListOfDataToQuizInfo(quizDatas));
}
/// <summary>
/// Gets a specified chunk of the levels on the server with a given string in their name
/// </summary>
/// <param name="quizName">search string for level names</param>
/// <param name="chunk">chunk of levels to get</param>
/// <returns>The chunk requested</returns>
public static List <QuizInfo> GetQuizzesByQuizNameChunked(string quizName, int chunk = 1)
{
List <string[]> quizData = ServerOperations.GetQuizzesByQuizName(quizName, chunk);
return(ListOfDataToQuizInfo(quizData));
}
/// <summary>
/// Delete the user's account in a background task.
/// </summary>
/// <param name="password">the current password of the account.</param>
/// <returns></returns>
private OperationReturnMessage DeleteAccount(string password)
{
Device.BeginInvokeOnMainThread(() => this.LabelDeleteAccountMessage.Text = "Waiting...");
return(ServerOperations.DeleteAccount(CredentialManager.Username, password.Trim()));
}
/// <summary>
/// Confirm the email associated with the account in a background task.
/// </summary>
/// <param name="token">The confirmation token sent to the user's email.</param>
/// <returns></returns>
private OperationReturnMessage ConfirmEmail(string token)
{
Device.BeginInvokeOnMainThread(() => this.LabelConfirmEmailMessage.Text = "Waiting...");
return(ServerOperations.ConfirmEmail(CredentialManager.Username, token.Trim()));
}
/// <summary>
/// Change the user's email in a background task.
/// </summary>
/// <param name="password">The current password of the account.</param>
/// <param name="newEmail">The new email.</param>
/// <returns></returns>
private OperationReturnMessage ChangeEmail(string password, string newEmail)
{
Device.BeginInvokeOnMainThread(() => this.LabelChangeEmailMessage.Text = "Waiting...");
return(ServerOperations.ChangeEmail(CredentialManager.Username, password.Trim(), newEmail.Trim()));
}
/// <summary>
/// Updates the local database by syncing with the server
/// </summary>
/// <returns>an awaitable task for the completion of syncing</returns>
public static async Task UpdateLocalDatabaseAsync()
{
if (App.Path != null && App.UserPath.Length > 2)
{
RealmConfiguration threadConfig = App.realmConfiguration(RosterPath);
Realm threadInstance = Realm.GetInstance(threadConfig);
List <QuizInfo> QuizInfos = new List <QuizInfo>(threadInstance.All <QuizInfo>());
if (CrossConnectivity.Current.IsConnected)
{
for (int i = 0; i < QuizInfos.Count(); i++)
{
if (CredentialManager.IsLoggedIn)
{
if (QuizInfos[i].IsDeletedLocally)
{
if (await ServerOperations.DeleteQuiz(QuizInfos[i].DBId) == OperationReturnMessage.True)
{
string toDeleteDBId = QuizInfos[i].DBId;
QuizInfos.Remove(QuizInfos[i]);
DeleteQuizInfo(toDeleteDBId);
}
}
else if (QuizInfos[i].SyncStatus != (int)SyncStatusEnum.NotDownloadedAndNeedDownload)
{
string lastModifiedDate = ServerOperations.GetLastModifiedDate(QuizInfos[i].DBId);
if (lastModifiedDate == "") // returns empty string could not reach server
{
QuizInfo copy = new QuizInfo(QuizInfos[i])
{
SyncStatus = (int)SyncStatusEnum.Offline // 3 represents offline
};
EditQuizInfo(copy, threadInstance);
}
else
{
// Server returns "false" if quiz is not already on the server
if (lastModifiedDate == "false" || lastModifiedDate == null)
{
QuizInfo copy = new QuizInfo(QuizInfos[i])
{
SyncStatus = (int)SyncStatusEnum.NeedUpload // 1 represents need upload
};
EditQuizInfo(copy, threadInstance);
}
else
{
DateTime localModifiedDateTime = Convert.ToDateTime(QuizInfos[i].LastModifiedDate);
DateTime serverModifiedDateTime = Convert.ToDateTime(lastModifiedDate);
if (localModifiedDateTime > serverModifiedDateTime)
{
QuizInfo copy = new QuizInfo(QuizInfos[i])
{
SyncStatus = (int)SyncStatusEnum.NeedUpload // 1 represents need upload
};
EditQuizInfo(copy, threadInstance);
}
else if (localModifiedDateTime < serverModifiedDateTime)
{
QuizInfo copy = new QuizInfo(QuizInfos[i])
{
SyncStatus = (int)SyncStatusEnum.NeedDownload // 0 represents needs download
};
EditQuizInfo(copy, threadInstance);
}
else if (localModifiedDateTime == serverModifiedDateTime)
{
QuizInfo copy = new QuizInfo(QuizInfos[i])
{
SyncStatus = (int)SyncStatusEnum.Synced // 2 represents in sync
};
EditQuizInfo(copy, threadInstance);
}
}
}
}
}
else
{
QuizInfo copy = new QuizInfo(QuizInfos[i])
{
SyncStatus = (int)SyncStatusEnum.Synced // 2 represents in sync
};
EditQuizInfo(copy, threadInstance);
}
}
string[] dbIds = new string[QuizInfos.Count];
for (int i = 0; i < dbIds.Length; i++)
{
dbIds[i] = QuizInfos[i].DBId;
}
List <string[]> missingQuizs = ServerOperations.GetMissingQuizzesByAuthorName(CredentialManager.Username, dbIds);
foreach (string[] missingQuiz in missingQuizs)
{
QuizInfo info = new QuizInfo
{
DBId = missingQuiz[0],
AuthorName = missingQuiz[1],
QuizName = missingQuiz[2],
Category = missingQuiz[3],
LastModifiedDate = missingQuiz[4],
SubscriberCount = int.Parse(missingQuiz[5]),
SyncStatus = (int)SyncStatusEnum.NotDownloadedAndNeedDownload
};
threadInstance.Write(() =>
{
threadInstance.Add(info);
});
}
}
else
{
for (int i = 0; i < QuizInfos.Count; i++)
{
QuizInfo copy = new QuizInfo(QuizInfos[i])
{
SyncStatus = (int)SyncStatusEnum.Offline // 3 represents offline
};
EditQuizInfo(copy, threadInstance);
}
}
}
}
/// <summary>
/// Loads the profile content if the user is logged in.
/// </summary>
/// <returns> </returns>
private async Task UpdateProfileContentAsync(string category)
{
if (!this.IsContentLoading)
{
this.IsContentLoading = true;
this.QuizNumber.IsVisible = true;
this.PickerCategory.IsVisible = false;
this.PickerCategory.IsEnabled = false;
this.StackLayoutQuizStack.Children.Clear();
this.StackLayoutQuizStack.IsEnabled = false;
this.ActivityIndicator.IsVisible = true;
this.ActivityIndicator.IsRunning = true;
await Task.Run(async() =>
{
await this.SetupQuizzes(category);
int createdCountFromServer = ServerOperations.GetNumberOfQuizzesByAuthorName(CredentialManager.Username);
string frameMessage = "";
if (createdCountFromServer >= 0) // Returns -1 if can't connect to server
{
if (createdCountFromServer == 0 &&
!QuizRosterDatabase.GetRoster()
.Any(quizInfo => quizInfo.AuthorName == CredentialManager.Username))
{
frameMessage = "You haven't made any quizzes yet!";
Device.BeginInvokeOnMainThread(() =>
{
this.PickerCategory.IsVisible = false;
this.QuizNumber.IsVisible = false;
});
}
else
{
Device.BeginInvokeOnMainThread(() =>
{
this.QuizNumber.Text = "You have published a total of " + createdCountFromServer + " quizzes!";
this.PickerCategory.IsVisible = true;
this.PickerCategory.IsEnabled = true;
});
}
}
else
{
frameMessage = "Could not connect to BizQuiz servers. Please try again later.";
Device.BeginInvokeOnMainThread(() =>
{
this.PickerCategory.IsVisible = true;
this.PickerCategory.IsEnabled = true;
});
}
if (frameMessage != "")
{
Frame frame = new Frame()
{
CornerRadius = 10,
HorizontalOptions = LayoutOptions.CenterAndExpand,
Content = new Label
{
Text = frameMessage,
HorizontalTextAlignment = TextAlignment.Center,
FontSize = 38
}
};
Device.BeginInvokeOnMainThread(() =>
this.StackLayoutQuizStack.Children.Add(frame));
}
});
if (this.ToolbarItems.Count <= 0)
{
ToolbarItem accountSettingsButton = new ToolbarItem();
accountSettingsButton.Clicked += this.ToolbarItemAccountSettings_Clicked;
accountSettingsButton.Icon = ImageSource.FromFile("ic_settings_white_48dp.png") as FileImageSource;
this.ToolbarItems.Add(accountSettingsButton);
}
this.IsOnLoginPage = false;
this.ActivityIndicator.IsRunning = false;
this.ActivityIndicator.IsVisible = false;
this.StackLayoutQuizStack.IsEnabled = true;
this.IsContentLoading = false;
}
}