/// <summary>
/// Triggered when the scrollsearch is moved, checks if more levels need to be loaded as the user scrolls down
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void ScrollSearch_Scrolled(object sender, ScrolledEventArgs e)
{
ScrollView scrollView = sender as ScrollView;
double scrollingSpace = scrollView.ContentSize.Height - scrollView.Height;
if (scrollingSpace <= e.ScrollY)
{
try
{
if (this.PickerCategory.SelectedIndex >= 0)
{
this.currentChunk++;
string category = this.PickerCategory.Items[this.PickerCategory.SelectedIndex];
await Task.Run(() =>
this.SetupNetworkQuizzes(category));
}
}
catch (Exception ex)
{
BugReportHandler.SaveReport(ex);
await this.DisplayAlert("Oops, network failure", "Try again later", "Ok");
}
}
}
/// <summary>
/// Refreshes the page's quiz content
/// </summary>
private async Task RefreshAsync()
{
this.LabelNoQuiz.IsVisible = false;
this.SearchedStack.Children.Clear();
this.quizzesFeatured.Clear();
try
{
if (CredentialManager.IsLoggedIn)
{
this.PickerCategory.IsVisible = true;
this.ToolbarItemSearchButton.IsEnabled = true;
Device.BeginInvokeOnMainThread(() => {
this.SearchedStack.Children.Clear();
this.ActivityIndicator.IsVisible = true;
this.ActivityIndicator.IsRunning = true;
});
await Task.Run(() => this.AddQuizzes(SearchUtils.GetQuizzesByAuthorChunked("BizQuiz", 1)));
Device.BeginInvokeOnMainThread(() =>
{
this.ActivityIndicator.IsVisible = false;
this.ActivityIndicator.IsRunning = false;
});
}
else
{
this.PickerCategory.IsVisible = false;
this.ToolbarItemSearchButton.IsEnabled = false;
this.SearchedStack.Children.Clear();
this.SearchedStack.Children.Add(
new Frame()
{
CornerRadius = 10,
HorizontalOptions = LayoutOptions.CenterAndExpand,
Content = new Label
{
Text = "Create an account to create, search for, and use quizzes " +
"created by the BizQuiz community!",
HorizontalTextAlignment = TextAlignment.Center,
FontSize = 38
}
});
}
}
catch (Exception ex)
{
BugReportHandler.SaveReport(ex);
await this.DisplayAlert("Error", "Couldn't get quizzes", "Ok");
}
}
/// <summary>
/// Gets a quizinfo based on a dbid
/// </summary>
/// <param name="dbId">id of the quiz to fetch</param>
/// <returns>the quiz matching the DBID (null if there isn't one)</returns>
public static QuizInfo GetQuizInfo(string dbId)
{
try
{
RealmConfiguration threadConfig = App.realmConfiguration(RosterPath);
Realm realmDB = Realm.GetInstance(threadConfig);
return(realmDB.All <QuizInfo>().Where
(quizInfo => quizInfo.DBId == dbId).First());
}
catch (Exception ex)
{
BugReportHandler.SaveReport(ex);
return(null);
}
}
/// <summary>
/// Read byte array of what the server returns.
/// </summary>
/// <param name="size">Size of the file to read</param>
/// <returns>Byte array of data that the server returns</returns>
private static byte[] ReadByteArray(int size)
{
try
{
if (CrossConnectivity.Current.IsConnected)
{
byte[] buffer = new byte[1024];
List <byte> data = new List <byte>();
int bytes = -1;
int bytesRead = 0;
do
{
int toRead = 0;
if ((size - bytesRead) > buffer.Length)
{
toRead = buffer.Length;
}
else
{
toRead = size - bytesRead;
}
bytes = ssl.Read(buffer, 0, toRead);
bytesRead += bytes;
if (bytes > 0)
{
for (int i = 0; i < bytes; i++)
{
data.Add(buffer[i]);
}
}
} while (data.Count < size);
data.RemoveRange(size, data.Count - size);
return(data.ToArray());
}
else
{
return(new byte[0]);
}
}
catch (Exception ex)
{
BugReportHandler.SaveReport(ex);
return(new byte[0]);
}
}
private async void Submit_Clicked(object sender, EventArgs e)
{
if (this.BugBodyEntry.Text == "" || String.IsNullOrWhiteSpace((string)this.CategoryPicker.SelectedItem) || this.BugTitleEntry.Text == "")
{
await this.DisplayAlert("Cannot Submit", "Please fill all required fields before submitting a bug report.", "Keep editing");
}
else
{
BugReport report = new BugReport(this.BugTitleEntry.Text, this.CategoryPicker.SelectedItem as string, this.BugBodyEntry.Text, this.ImagePath);
BugReportHandler.SaveReport(report);
Task task = Task.Run(() => BugReportHandler.SubmitSavedReports());
await this.DisplayAlert("Report Saved", "We'll send your report as soon as we can, and our team will take a look at your issue. Thanks for letting us know!", "OK");
await task;
await this.Navigation.PopAsync();
}
}
/// <summary>
/// Given a dbid, deletes it from the roster
/// </summary>
/// <param name="dbId">ID of quiz to delete</param>
/// <returns>indicated whether or not the quizz was successfully deleted</returns>
public static bool DeleteQuizInfo(string dbId)
{
try
{
RealmConfiguration threadConfig = App.realmConfiguration(RosterPath);
Realm realmDB = Realm.GetInstance(threadConfig);
realmDB.Write(() =>
{
realmDB.Remove(realmDB.All <QuizInfo>().Where(quizInfo => quizInfo.DBId == dbId).First());
});
return(true);
}
catch (Exception ex)
{
BugReportHandler.SaveReport(ex);
return(false);
}
}
/// <summary>
/// Conducts a search of the online database
/// </summary>
/// <returns></returns>
private async Task SearchAsync()
{
try
{
this.isLoading = true;
Device.BeginInvokeOnMainThread(() =>
{
this.SearchedStack.Children.Clear();
this.ActivityIndicator.IsRunning = true;
});
List <QuizInfo> chunk = new List <QuizInfo>();
if (this.searchType == SearchType.Title)
{
chunk = SearchUtils.GetQuizzesByQuizNameChunked(this.SearchBar.Text, this.currentChunk);
}
else
{
chunk = SearchUtils.GetQuizzesByAuthorChunked(this.SearchBar.Text, this.currentChunk);
}
if (chunk.Count < 20)
{
await Task.Run(() => this.AddQuizzes(chunk));
}
Device.BeginInvokeOnMainThread(() =>
{
if (this.SearchedStack.Children.Count() == 0)
{
this.LableNone.IsVisible = true;
}
else
{
this.LableNone.IsVisible = false;
}
this.ActivityIndicator.IsRunning = false;
});
this.isLoading = false;
}
catch (Exception ex)
{
BugReportHandler.SaveReport(ex);
await this.DisplayAlert("Search Failed", "Try again later", "Ok");
}
}
public Task SetupDefaultQuizzesAsync(string userpath)
{
try
{
var assembly = IntrospectionExtensions.GetTypeInfo(typeof(AppDelegate)).Assembly;
using (Stream dbAssetStream = assembly.GetManifestResourceStream("appFBLA2019.dflt.zip"))
{
MemoryStream memStream = new MemoryStream();
dbAssetStream.CopyTo(memStream);
memStream.Position = 0;
File.WriteAllBytes(userpath + "dflt.zip", memStream.ToArray());
ZipFile.ExtractToDirectory(userpath + "dflt.zip", userpath, true);
File.Delete(userpath + "dflt.zip");
}
}
catch (Exception ex)
{
BugReportHandler.SaveReport(ex, "SetupDefaultLevels");
}
return(Task.CompletedTask);
}
/// <summary>
/// Copies the default levels from the assets to the user folder
/// </summary>
/// <param name="userpath"></param>
/// <returns></returns>
public async Task SetupDefaultQuizzesAsync(string userpath)
{
if (await CrossPermissions.Current.CheckPermissionStatusAsync(Plugin.Permissions.Abstractions.Permission.Storage) == PermissionStatus.Granted)
{
try
{
using (Stream dbAssetStream = Android.App.Application.Context.Assets.Open("dflt.zip"))
{
MemoryStream memStream = new MemoryStream();
dbAssetStream.CopyTo(memStream);
memStream.Position = 0;
File.WriteAllBytes(userpath + "dflt.zip", memStream.ToArray());
ZipFile.ExtractToDirectory(userpath + "dflt.zip", userpath, true);
File.Delete(userpath + "dflt.zip");
}
}
catch (Exception ex)
{
BugReportHandler.SaveReport(ex, "SetupDefaultLevels");
}
}
}