/// <summary>
/// It will set the user_Password to null and creates then a new loginData.xml
/// </summary>
public void Logout()
{
// It will set true on the Main Page
localFileSystem file = new localFileSystem();
CurrentUser = file.GetUser();
CurrentUser.user_Password = null;
RememberLogin(CurrentUser);
file.DeleteUser();
}
/// <summary>
/// Receives the User Login Status
/// </summary>
protected override void OnStart()
{
DataAccessHandler.InitDataAccess(DataAccessHandler.InterfaceType.MySqlPhp);
localFileSystem file = new localFileSystem();
CurrentUser = file.GetUser();
if (IsLoggedIn)
{
MainPage = new NavigationPage(new MainMenuPage(CurrentUser));
}
else
{
MainPage = new LoginModalPage();
}
// Handle when your app starts
}
public async void AddProduct(string productCode)
{
try
{
if (!await DataAccessHandler.DataAccess.IsValidKey(productCode))
{
await DisplayAlert("Produktcode ungültiger", "Es wurde ein ungültiger Produktcode eingegeben. Bitte anderen code eingeben.", "Neue Eingabe");
return;
}
localFileSystem file = new localFileSystem();
String userPath = file.AdjustPath(file.GetUser().user_Email);
//Gets the Serveradress
DataAccessHandler accessHandler = new DataAccessHandler();
string serverAdress = accessHandler.ServerAdress;
IFtpClient client = DependencyService.Get<IFtpClient>();
Product product = await DataAccessHandler.DataAccess.GetProductByKey(productCode);
List<Product> listUserProducts = await DataAccessHandler.DataAccess.GetUserProducts(file.GetUser());
foreach (var userProducts in listUserProducts)
{
if (userProducts.product_ID == product.product_ID)
{
await DisplayAlert("Produkt bereits vorhanden!", "Sie besitzen dieses Produkt bereits", "OK");
return;
}
}
//Loads the List<PContent> of the Product from the server
List<PContent> listPContents = await DataAccessHandler.DataAccess.GetPContent(product.product_ID);
//Loads the List<PContent> of the Product from the the User-Folder
List<PContent> newlistPContents = file.loadContentList(userPath);
foreach (PContent pcontent in listPContents)
{
//stops if the pcontent is empty
if (pcontent.content_ID == 0) break;
//adds new Pcontent if necessary
while (newlistPContents.Count <= pcontent.content_ID)
{
newlistPContents.Add(null);
}
//updates PContent
newlistPContents[pcontent.content_ID] = pcontent;
if (pcontent.content_Kind!=0) {
client.DownloadFile(@"Thumbnail/" + pcontent.content_ID + ".png",
DependencyService.Get<ISaveAndLoad>().Getpath(file.GetUser().user_Email + @"/Thumbnail/") + pcontent.content_ID + ".png", serverAdress, accessHandler.FtpName,
accessHandler.FtpPassword);
}
List<string> contentPath =
await DataAccessHandler.DataAccess.GetFileServerPath(pcontent.content_ID);
//creates a new p folder for the content_Kind if not exists
DependencyService.Get<ISaveAndLoad>().CreateFolder(DependencyService.Get<ISaveAndLoad>().PathCombine(
DependencyService.Get<ISaveAndLoad>().Getpath(userPath), "p" + pcontent.content_ID));
foreach (var path in contentPath)
{
if (pcontent.content_ID == 0) break;
//Download for each PContent its Files
DependencyService.Get<ISaveAndLoad>().CreateFolder(userPath + @"/p" + pcontent.content_ID);
client.DownloadFile(path,
DependencyService.Get<ISaveAndLoad>().Getpath(file.GetUser().user_Email) + @"/p" +
pcontent.content_ID + @"/" + Path.GetFileName(path), serverAdress, accessHandler.FtpName,
accessHandler.FtpPassword);
}
}
//Adds the Product to the Product-File from the User
List<Product> newUserProducts = file.LoadProductList();
//newUserProducts.Add(product);
file.SaveModelsLocal(userPath, newUserProducts, newlistPContents);
//Adds the Product to the User in the Database
DataAccessHandler.DataAccess.AddProductToUser(product.product_ID, file.GetUser());
DataAccessHandler.DataAccess.SetProductKeyInvalid(productCode);
await DisplayAlert("Produkt aktiviert!", "Das Produkt wurde erfolgreiche aktiviert!", "OK");
await Navigation.PushModalAsync(new NavigationPage(new MainMenuPage(file.GetUser())));
}
catch (Exception e)
{
Debug.WriteLine("Fehler beim hinzufügen von Produkt: " + e);
await DisplayAlert("Fehler beim Downloaden", "Es gab einen Fehler beim Downloaden, bitte erneut versuchen", "OK");
}
}
/// <summary>
/// Set current user with user parameter and saves the login in loginData.xml
/// </summary>
/// <param name="user"></param>
public void Login(User user)
{
localFileSystem file = new localFileSystem();
file.SaveUser(user);
RememberLogin(user);
}
/// <summary>
/// Checks if loginData.xml exists and delete it if so. Definitaly creates a new loginData.xml file
/// </summary>
/// <param name="user"></param>
public async void RememberLogin(User user)
{
await Task.Run(() =>
{
localFileSystem file = new localFileSystem();
file.SaveUser(user);
//string userLoginDataFilePath = UserLoginDataFilePath();
//ISaveAndLoad saveAndLoad = DependencyService.Get<ISaveAndLoad>();
//if(saveAndLoad.fileExist(userLoginDataFilePath))
// saveAndLoad.deleteFile(userLoginDataFilePath);
//saveAndLoad.saveUserXml(userLoginDataFilePath, user);
});
}
public async Task DownloadInitialContent(User user)
{
try
{
localFileSystem files = new localFileSystem();
String userPath = files.AdjustPath(user.user_Email);
//A newly created User cant have a folder with the same name in the folder so no check must be implemented
files.CreateInitalFolders(userPath);
DataAccessHandler accessHandler = new DataAccessHandler();
string serverAdress = accessHandler.ServerAdress;
IFtpClient client = DependencyService.Get<IFtpClient>();
//Download all Products from the database
List<Product> listAllProducts = await DataAccessHandler.DataAccess.GetAllProducts();
List<PContent> newEmptyContent = new List<PContent>();
foreach (var productAll in listAllProducts)
{
if (productAll.product_ID == 0) break;
//Download Thumbnail in Produkte Folder
client.DownloadFile(@"Produkte/" + productAll.product_Thumbnail,
DependencyService.Get<ISaveAndLoad>().Getpath(@"Produkte/") + productAll.product_Thumbnail, serverAdress, accessHandler.FtpName,
accessHandler.FtpPassword);
}
files.SaveUser(user);
files.SaveModelsLocal(userPath, listAllProducts, newEmptyContent);
//Hier GetALLProducts ansttt nur user products
List<Product> listUserProducts = await DataAccessHandler.DataAccess.GetUserProducts(user);
List<PContent> newlistPContents = new List<PContent>();
foreach (var product in listUserProducts)
{
//loads the PContent from the server
List<PContent> listUserPContents =
await DataAccessHandler.DataAccess.GetPContent(product.product_ID);
if (product.product_ID == 0) break;
foreach (var pcontent in listUserPContents)
{
if (pcontent.content_ID == 0) break;
//creates a new p folder if not exists for content_Kind
DependencyService.Get<ISaveAndLoad>().CreateFolder(DependencyService.Get<ISaveAndLoad>().PathCombine(
DependencyService.Get<ISaveAndLoad>().Getpath(userPath), "p" + pcontent.content_ID));
List<string> contentPath = await DataAccessHandler.DataAccess.GetFileServerPath(pcontent.content_ID);
foreach (var path in contentPath)
{
//loads every content from PContent
client.DownloadFile(path,
DependencyService.Get<ISaveAndLoad>().Getpath(files.GetUser().user_Email) + @"/p" + pcontent.content_ID + @"/" + Path.GetFileName(path), serverAdress, accessHandler.FtpName,
accessHandler.FtpPassword);
}
while (newlistPContents.Count <= pcontent.content_ID)
{
newlistPContents.Add(null);
}
//updates Pcontent
newlistPContents[pcontent.content_ID] = pcontent;
if (pcontent.content_Kind != 0)
{
client.DownloadFile(@"Thumbnail/" + pcontent.content_ID + ".png",
DependencyService.Get<ISaveAndLoad>().Getpath(files.GetUser().user_Email + @"/Thumbnail/") + pcontent.content_ID + ".png", serverAdress, accessHandler.FtpName,
accessHandler.FtpPassword);
}
}
}
//Saves User, Products and PContent XML
files.SaveUser(user);
files.SaveModelsLocal(userPath, listAllProducts, newlistPContents);
}
catch (Exception e)
{
Debug.WriteLine("catched DL Exception: " + e);
await DisplayAlert("Fehler beim Downloaden", "Es gab einen Fehler beim Downloaden, bitte erneut versuchen", "OK");
}
}
/// <summary>
/// Konstruktor der MainMenuPage, welcher eine Instanz der Seite erstellt.
/// </summary>
/// <param name="user"></param>
public MainMenuPage(User user)
{
DataAccessHandler accessHandler = new DataAccessHandler();
string serverAdress = accessHandler.ServerAdress;
files = new localFileSystem();
String userPath = files.AdjustPath(user.user_Email);
files.CreateInitalFolders(userPath);
//Toolbar
ToolbarItem toolButton = new ToolbarItem
{
Name = "Hinzufügen",
Order = ToolbarItemOrder.Primary,
Icon = null,
Command = new Command(() => Navigation.PushAsync(new AddProduktPage()))
};
this.ToolbarItems.Add(toolButton);
//?
//InitLogout();
//Ende Toolbar
//View
ProductCollection = new Collection<Product>();
ProductCollection = files.LoadProductList();
List<PContent> PcontentCollection = files.loadContentList(userPath);
ScrollView scrollView = new ScrollView();
StackLayout stackLayout = new StackLayout();
foreach (Product product in ProductCollection)
{
TapGestureRecognizer gesture = new TapGestureRecognizer();
bool owned = files.HasContent(product, PcontentCollection);
Color color = Color.FromHex("E2001A");
DetailPage detailPage = new DetailPage(product, userPath);
var test = (DependencyService.Get<ISaveAndLoad>().PathCombine(DependencyService.Get<ISaveAndLoad>().Getpath(localFileSystem.productFolderLocation), product.product_ID + product.product_Thumbnail));
if (owned == true)
color = Color.FromHex("006AB3");
Frame frame = new Frame
{
BackgroundColor = color,
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
Content = new StackLayout
{
Orientation = StackOrientation.Horizontal,
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = LayoutOptions.StartAndExpand,
Children =
{
new Image
{
Source = ImageSource.FromFile(DependencyService.Get<ISaveAndLoad>().PathCombine(DependencyService.Get<ISaveAndLoad>().Getpath(localFileSystem.productFolderLocation), product.product_Thumbnail)),
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = LayoutOptions.Center,
HeightRequest = 110
},
new Label
{
FormattedText = product.product_Name,
TextColor = Color.Black,
VerticalOptions = LayoutOptions.Center,
FontSize = Device.GetNamedSize(NamedSize.Medium, typeof(Label)),
HorizontalOptions = LayoutOptions.Center
},
}//ende stacklayout (innen)
}//ende stacklayout
};//frame ende
stackLayout.Children.Add(frame);
gesture.Tapped += async (sender, e) =>
{
await Navigation.PushAsync(detailPage);
};
frame.GestureRecognizers.Add(gesture);
}
scrollView.Content = stackLayout;
Content = scrollView;
BackgroundColor = Color.White;
Padding = new Thickness(5, Device.OnPlatform(0, 15, 0), 5, 5);
//View Ende
}
/// <summary>
/// Checks: if Empty Email or password, if valid Email, if valid Login. Password Entry is set as isPassword and the shown Passworddigits only contains zeros. Password will be stored as SHA512StringHash
/// </summary>
public LoginPage()
{
BackgroundColor = new Color(255, 255, 255, 1);
var button = new Button { Text = "Login", BackgroundColor = Color.FromHex("006AB3") };
button.Clicked += async (sender, e) =>
{
//Checks if the Entry for username or password is empty
if (String.IsNullOrEmpty(username.Text) || String.IsNullOrEmpty(password.Text))
{
password.Text = "";
await DisplayAlert("Abfragefehler", "E-Mail und Passwort bitte angeben", "Neue Eingabe");
return;
}
//Checks if the Email Entry is receiving a valid Email String
if (!IsValidEmail(username.Text))
{
password.Text = "";
await DisplayAlert("Ungültige E-Mail", "E-Mail ist in einem ungültigen Format angegeben worden", "Neue Eingabe");
return;
}
// Converts Password in SHA512StringHash
string passwordHash = DependencyService.Get<IHash>().Sha512StringHash(password.Text);
// Sets the Passworddigits to zero after receiving a letter
password.Text = new string('0', password.Text.Length);
User validUser = await IsValidLogin(new User(username.Text, passwordHash));
// Checks with null parameter if user is valid
if (null == validUser)
{
password.Text = "";
if (_exception)
await DisplayAlert("Verbindungsfehler", "Server ist nicht erreichtbar. Internetzugang aktiv?", "OK");
else
await DisplayAlert("Ungültiger Login", "E-Mail oder Passwort falsch angegeben", "Neue Eingabe");
}
else
{
localFileSystem file = new localFileSystem();
App.Current.Login(validUser);
if (!DependencyService.Get<ISaveAndLoad>().FileExist(DependencyService.Get<ISaveAndLoad>().PathCombine(file.AdjustPath( validUser.user_Email), "PContent")))
{
Debug.WriteLine("getphath2 " + DependencyService.Get<ISaveAndLoad>().Getpath(""));
await DisplayAlert("Neue Anmeldung", "Sie haben sich an einem neuen Gerät angemeldet. Daten werden runtergeladen", "OK");
CreateAccountPage cap = new CreateAccountPage();
await cap.DownloadInitialContent(validUser);
}
await Navigation.PushModalAsync(new NavigationPage(new MainMenuPage(validUser)));
}
};
var create = new Button { Text = "Account erstellen", BackgroundColor = Color.FromHex("E2001A") };
create.Clicked += (sender, e) =>
{
MessagingCenter.Send<ContentPage>(this, "Erstellen");
};
//Receives the CurrentUser and Set the Entry field as the Email from the last user with a valid Login
username = new Entry { Text = App.Current.CurrentUser != null ? App.Current.CurrentUser.user_Email : "", BackgroundColor = Color.FromHex("3f3f3f") };
password = new Entry { Text = "", BackgroundColor = Color.FromHex("3f3f3f"), IsPassword = true };
Content = new StackLayout
{
Padding = new Thickness(10, 40, 10, 10),
//VerticalOptions = LayoutOptions.Center,
Children = {
new Label { Text = "Login", TextColor = Color.FromHex("006AB3"), FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)) },
new Label { Text = "E-Mail", TextColor = Color.FromHex("000000")},
username,
new Label { Text = "Passwort", TextColor = Color.FromHex("000000")},
password,
button, create
}
};
}
