/// <summary>
/// Sets up the page with quizzes the user has subscribed to from the category of the page
/// </summary>
public void Setup()
{
if (!this.IsLoading)
{
this.IsLoading = true;
this.StackLayoutButtonStack.Children.Clear();
List <QuizInfo> quizzes = QuizRosterDatabase.GetRoster(this.category);
if (quizzes.Count == 0)
{
Device.BeginInvokeOnMainThread(() =>
{
StackLayout stack = new StackLayout();
stack.Children.Add(new Label
{
Text = "You don't have any quizzes in this category yet!",
HorizontalTextAlignment = TextAlignment.Center,
FontSize = 38
});
if (CredentialManager.IsLoggedIn)
{
stack.Children.Add(new Button
{
Text = "Make a quiz now",
CornerRadius = 25,
BackgroundColor = Color.Accent,
TextColor = Color.White,
FontSize = 26
});
(stack.Children[1] as Button).Clicked += (object sender, EventArgs e) => this.Navigation.PushAsync(new CreateNewQuizPage());
stack.Children.Add(new Button
{
Text = "Search for quizzes",
CornerRadius = 25,
BackgroundColor = Color.Accent,
TextColor = Color.White,
FontSize = 26
});
(stack.Children[2] as Button).Clicked += (object sender, EventArgs e) => this.Navigation.PushAsync(new SearchPage());
}
Frame frame = new Frame()
{
CornerRadius = 10,
HorizontalOptions = LayoutOptions.CenterAndExpand,
Content = stack
};
this.StackLayoutButtonStack.Children.Add(frame);
});
}
foreach (QuizInfo quiz in quizzes)
{
Frame frame = GenerateFrame(quiz);
this.StackLayoutButtonStack.Children.Add(frame);
}
this.IsLoading = false;
}
}
/// <summary>
/// Sets up the quizzes owned by this user as cards
/// </summary>
private async Task SetupQuizzes(string category)
{
await QuizRosterDatabase.UpdateLocalDatabaseAsync();
// A single LINQ statement to get all quizzes by the current
// user that is logged in, and of the specified category,
// taking the top 20 of the current chunk ordered by
// the subscriber count of the quizzes
List <QuizInfo> rosterCopy = QuizRosterDatabase.GetRoster();
List <QuizInfo> quizzes =
rosterCopy.
Where(
quizInfo =>
(quizInfo.AuthorName == CredentialManager.Username
&&
(quizInfo.Category == category || category == "All"))).
OrderBy(quizInfo => quizInfo.SubscriberCount).
Take(20 * this.currentChunk).ToList();
this.AddQuizzes(quizzes, false);
}
/// <summary>
/// Adds a quiz to the search stack given a QuizInfo
/// </summary>
/// <param name="quizzes"></param>
private void AddQuizzes(List <QuizInfo> quizzes)
{
List <QuizInfo> currentlySubscribed = QuizRosterDatabase.GetRoster();
foreach (QuizInfo quiz in quizzes)
{// Only add quiz if the category is what user picked (we are asking the server for more then we need so this could be changed)
if (this.category == "All" || quiz.Category == this.category)
{
Frame quizFrame = new Frame
{
VerticalOptions = LayoutOptions.Start,
HorizontalOptions = LayoutOptions.FillAndExpand,
CornerRadius = 10
};
StackLayout frameStack = new StackLayout
{
FlowDirection = FlowDirection.LeftToRight,
Orientation = StackOrientation.Vertical
};
StackLayout topStack = new StackLayout
{
FlowDirection = FlowDirection.LeftToRight,
Orientation = StackOrientation.Horizontal
};
Label quizName = new Label // 0
{
Text = quiz.QuizName,
FontAttributes = FontAttributes.Bold,
FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)),
HorizontalOptions = LayoutOptions.StartAndExpand
};
topStack.Children.Add(quizName);
ImageButton ImageButtonSubscribe = new ImageButton // 1
{
IsVisible = false,
Source = "ic_playlist_add_black_48dp.png",
StyleId = quiz.DBId,
HeightRequest = 30,
BackgroundColor = Color.White,
HorizontalOptions = LayoutOptions.End
};
ImageButtonSubscribe.Clicked += this.ImageButtonSubscribe_Clicked;
topStack.Children.Add(ImageButtonSubscribe);
ImageButton ImageButtonUnsubscribe = new ImageButton // 2
{
IsVisible = false,
Source = "ic_playlist_add_check_black_48dp.png",
StyleId = quiz.DBId,
HeightRequest = 30,
BackgroundColor = Color.White,
HorizontalOptions = LayoutOptions.End
};
ImageButtonUnsubscribe.Clicked += this.ImageButtonUnsubscribe_Clicked;
topStack.Children.Add(ImageButtonUnsubscribe);
ActivityIndicator Syncing = new ActivityIndicator // 3
{
IsVisible = false,
Color = Color.Accent,
HeightRequest = 25,
WidthRequest = 25,
VerticalOptions = LayoutOptions.StartAndExpand,
HorizontalOptions = LayoutOptions.End,
};
topStack.Children.Add(Syncing);
if (quiz.AuthorName != CredentialManager.Username)
{
// If already subscribed
if (!(currentlySubscribed.Where(quizInfo => quizInfo.DBId == quiz.DBId && !quizInfo.IsDeletedLocally).Count() > 0))
{
ImageButtonSubscribe.IsVisible = true;
}
else
{
ImageButtonUnsubscribe.IsVisible = true;
}
}
frameStack.Children.Add(topStack);
Label quizAuthor = new Label
{
Text = "Created by: " + quiz.AuthorName,
};
frameStack.Children.Add(quizAuthor);
Label quizCategory = new Label
{
Text = "Category: " + quiz.Category,
};
frameStack.Children.Add(quizCategory);
quizFrame.Content = frameStack;
this.quizzesSearched.Add(quiz);
Device.BeginInvokeOnMainThread(() =>
this.SearchedStack.Children.Add(quizFrame));
}
}
}
/// <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;
}
}