async private void JoinHouseholdButton_Clicked(object sender, EventArgs e)
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
// Household tmp = db.Household.FindByHouseholdId(JoinHouseholdEntry.Text);
if (db.Household.Exists(new Household()
{
HouseholdId = JoinHouseholdEntry.Text
}))
{
User user = new User()
{
Name = Username,
Password = HashedPassword,
HouseholdId = JoinHouseholdEntry.Text
};
db.User.AddIfNotExists(user);
App.Current.MainPage = new LoginPage();
}
else
{
//tmp = null;
await DisplayAlert("Falsche Eingabe", "Dieser Haushalt existiert nicht.", "Zurück zum Haushalt");
}
}
public HomePage()
{
db = new HaushaltsplanerDB();
InitializeComponent();
BindingContext = viewModel = new HomeViewModel();
}
async void CreateUserButtonOnClick(object sender, EventArgs args)
{
if (string.IsNullOrWhiteSpace(RegisterUsername.Text) || string.IsNullOrWhiteSpace(RegisterPassword.Text))
{
await DisplayAlert("Ungültige Eingabe", "Geben Sie einen Benutzernamen und ein Passwort ein.", "Zurück zur Registrierung");
}
else
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
//User tmp = db.User.FindByName(RegisterUsername.Text);
if (db.User.Exists(new User()
{
Name = RegisterUsername.Text
}))
{
await DisplayAlert("Benutzername bereits vergeben", "Dieser Benutzername ist bereits vergeben. Bitte geben Sie einen anderen Namen ein.", "Zurück zur Registrierung");
}
else
{
await Navigation.PushAsync(new RegisterHouseholdPage()
{
Username = RegisterUsername.Text, HashedPassword = Crypto.ComputeSHA256(RegisterPassword.Text)
});
}
}
}
/// <summary>
/// Returns a list of users that joined the household
/// </summary>
/// <returns></returns>
private List <User> FindAllHouseholdUsers()
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
List <User> household_users = db.User.FindAllUserFromHousehold(Session.Household.HouseholdId);
return(household_users);
}
/// <summary>
/// Overwrites session with data from database
/// </summary>
public void Pull()
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
User = db.User.FindByName(Session.User.Name);
Household = db.Household.FindByHouseholdId(Session.Household.HouseholdId);
HouseholdUsers = FindAllHouseholdUsers();
}
public static void RegisterJoinHousehold(string username, string password, string householdID)
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
string hashed_pwd = Crypto.ComputeSHA256(password);
db.User.AddIfNotExists(new User()
{
Name = username, Password = hashed_pwd, HouseholdId = householdID
});
}
protected override void OnAppearing()
{
base.OnAppearing();
HaushaltsplanerDB db = new HaushaltsplanerDB();
List <User> household_users = db.User.FindAllUserFromHousehold(Session.Household.HouseholdId);
Label_username.Text = Session.User.Name;
Label_household.Text = Session.User.HouseholdId;
Label_houshold_user.Text = string.Join(", ", household_users);
}
public SettingsPage()
{
InitializeComponent();
HaushaltsplanerDB db = new HaushaltsplanerDB();
List <User> household_users = db.User.FindAllUserFromHousehold(Session.Household.HouseholdId);
Label_username.Text = Session.User.Name;
Label_household.Text = Session.User.HouseholdId;
Label_houshold_user.Text = string.Join(", ", household_users);
}
public HouseholdViewModel()
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
Session.Household = db.Household.FindByHouseholdId(Session.Household.HouseholdId);
Title = $"Haushalt {Session.Household.Name}";
_householdUsers = Session.HouseholdUsers;
Total = 0;
ShowPieChart(DateTime.Now);
ShowPointChart(DateTime.Now.Year);
}
public static bool CheckIfUserExists(string username)
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
if (db.User.FindByName(username) != null)
{
return(true);
}
else
{
return(false);
}
}
public static bool LoginUser(string username, string password)
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
string hashed_pwd = Crypto.ComputeSHA256(password);
User user = db.User.FindByName(username);
Household household = db.Household.FindByHouseholdId(user.HouseholdId);
if (user.Password == hashed_pwd)
{
Session Session = new Session(user, household);
return(true);
}
else
{
return(false);
}
}
async private void CreateHouseholdButton_Clicked(object sender, EventArgs e)
{
if (string.IsNullOrWhiteSpace(RegisterHousholdEntry.Text))
{
await DisplayAlert("Falsche Eingabe", "Bitte geben Sie einen Namen ein.", "Zurück zum Haushalt");
}
else
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
Random rnd = new Random();
int _randomId, _idLength;
string _finalId;
Household household = new Household();
do
{
_randomId = rnd.Next(1, 9999);
_idLength = _randomId.ToString().Length;
_finalId = String.Empty;
for (int i = 0; i < (4 - _idLength); i++)
{
_finalId = _finalId + "0";
}
_finalId = _finalId + _randomId.ToString();
household = new Household()
{
Name = RegisterHousholdEntry.Text,
HouseholdId = RegisterHousholdEntry.Text + "#" + _finalId
};
} while (db.Household.Exists(household));
User user = new User()
{
Name = Username,
Password = HashedPassword,
HouseholdId = household.HouseholdId
};
db.Household.AddIfNotExists(household);
db.User.AddIfNotExists(user);
App.Current.MainPage = new LoginPage();
}
}
public PurchaseViewModel()
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
Session.Household = db.Household.FindByHouseholdId(Session.Household.HouseholdId);
Title = "Einkäufe";
Purchases = new ObservableCollection <Purchase>();
PopulatePurchases();
// Creates a subscriber that waits for new added purchases from New Purchase Page
MessagingCenter.Subscribe <NewPurchasePage, Purchase>(this, "AddPurchase", (sender, arg) =>
{
// insert new purchase to listview
Purchases.Insert(0, arg);
});
}
/// <summary>
/// creates a new session when username and password are correct
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
async void LoginButtonOnClick(object sender, EventArgs args)
{
// username and password required for login
if (string.IsNullOrWhiteSpace(username.Text) || string.IsNullOrWhiteSpace(password.Text))
{
// error message
await DisplayAlert("Fehlende Eingabe", "Bitte geben Sie Benutzernamen und Passwort ein.", "Zurück zum Login");
}
else
{
// MongoDB Connection
HaushaltsplanerDB db = new HaushaltsplanerDB();
string hashed_pwd = Crypto.ComputeSHA256(password.Text); // password hashed (SHA256)
User user = db.User.FindByName(username.Text); // instanciates user object from database
//if user does not exist
if (user == null)
{
// error message
await DisplayAlert("Falsche Eingabe", "Falscher Benutzername oder Passwort.", "Zurück zum Login");
hashed_pwd = String.Empty;
}
else // if user exists
{
// instanciates household object from database
Household household = db.Household.FindByHouseholdId(user.HouseholdId);
// if password and username are correct
if (user.Password == hashed_pwd)
{
// create a new session that can be accessed later on
Session Session = new Session(user, household);
App.Current.MainPage = new MainPage();
}
else // wrong password
{
// error message
await DisplayAlert("Falsche Eingabe", "Falscher Benutzername oder Passwort.", "Zurück zum Login");
hashed_pwd = String.Empty;
user = null;
}
}
}
}
public HomeViewModel()
{
HaushaltsplanerDB db = new HaushaltsplanerDB();
Session.Household = db.Household.FindByHouseholdId(Session.Household.HouseholdId);
Title = "Startseite";
HouseholdUsers = new ObservableCollection <User>();
Claim = new ObservableCollection <UserClaim>();
Debt = new ObservableCollection <UserDebt>();
_claim_dictionary = new Dictionary <string, double>();
_debt_dictionary = new Dictionary <string, double>();
Netto = 0;
_household_users = FindAllHouseholdUsers();
// Fills the listview with data
PopulateHouseholdUsers();
CostCalculation();
}
public async void InsertPurchase(object sender, EventArgs e)
{
if (!IsFormValid())
{
await DisplayAlert("Fehler", "Bitte geben Sie ein Titel und ein gültigen Preis an.", "Ok");
return;
}
// create username list from selected users in collection view CollectionView_purchase_involved_users
List <String> _usersInvolved = new List <String>();
foreach (var item in CollectionView_purchase_involved_users.SelectedItems)
{
User selectedUser = (User)item;
_usersInvolved.Add(selectedUser.Name);
}
// add payed users to involved
//if (!_usersInvolved.Contains(((User)Picker_purchase_payed_by.SelectedItem).Name))
//{
// _usersInvolved.Add(((User)Picker_purchase_payed_by.SelectedItem).Name);
//}
// add payed users to payed list
List <string> _usersInvolvedPayed = new List <string>();
_usersInvolvedPayed.Add(((User)Picker_purchase_payed_by.SelectedItem).Name);
// get image
Receipt receipt = new Receipt();
try
{
ImageSource img = Image_purchase_receipt.Source;
if ((viewModel.ReceiptImageLocalPath != null || viewModel.ReceiptImageLocalPath != "") &&
(viewModel.Image_ReceiptImage != null))
{
viewModel.ReceiptImageS3Path = await S3.Upload(viewModel.ReceiptImageLocalPath, viewModel.Image_ReceiptImage.Id.ToString());
receipt.ImageUrl = $"{viewModel.ReceiptImageS3Path}";
}
}
catch (Exception)
{
}
Purchase newPurchase = new Purchase()
{
Title = Entry_purchase_title.Text,
Price = double.Parse(Entry_purchase_price.Text),
Date = DatePicker_purchase_day.Date,
UserPayed = ((User)Picker_purchase_payed_by.SelectedItem).Name,
UsersInvolved = _usersInvolved,
UsersInvolvedPayed = _usersInvolvedPayed,
Receipt = receipt
};
HaushaltsplanerDB db = new HaushaltsplanerDB();
// sync session with database
Session.Household = db.Household.FindByHouseholdId(Session.Household.HouseholdId);
// add new purchase to session
Session.Household.AddPurchase(newPurchase);
// update database with session
db.Household.Update(Session.Household);
// Send message to Purchase Page
// updates listview with new purchase
MessagingCenter.Send(this, "AddPurchase", newPurchase);
CollectionView_purchase_involved_users.SelectedItem = null;
CollectionView_purchase_involved_users.SelectedItems = null;
Navigation.PopAsync();
}
