src/Main.java

@@ -1,19 +0,0 @@
-import me.teridax.jcash.gui.login.LoginView;
-
-import javax.swing.*;
-
-public class Main {
-
-    public static void main(String[] args) {
-        SwingUtilities.invokeLater(() -> {
-          //  Loader.load();
-
-            var window = new JFrame();
-            window.setTitle("Bankautomat");
-            window.setLocationByPlatform(true);
-            window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-            window.add(new LoginView());
-            window.setVisible(true);
-        });
-    }
-}

src/me/teridax/jcash/Main.java

@@ -0,0 +1,61 @@
+package me.teridax.jcash;
+
+import me.teridax.jcash.gui.Loader;
+import me.teridax.jcash.gui.account.AccountController;
+import me.teridax.jcash.gui.login.LoginController;
+
+import javax.swing.*;
+
+public class Main {
+
+    private static Main instance;
+
+    private final JFrame window;
+
+    private Main() {
+        window = new JFrame();
+        window.setTitle("Bankautomat");
+        window.setLocationByPlatform(true);
+        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    }
+
+    public static void main(String[] args) {
+        instance();
+        getInstance().popLoginScreen();
+    }
+
+    public static Main getInstance() {
+        return instance;
+    }
+
+    public static void instance() {
+        if (instance == null) {
+            instance = new Main();
+            return;
+        }
+
+        throw new IllegalStateException("me.teridax.jcash.Main is already initialized");
+    }
+
+    public void popLoginScreen() {
+        SwingUtilities.invokeLater(() -> {
+            var path = Loader.load();
+            var login = new LoginController(path);
+
+            login.addAccountSelectionListener(account -> {
+                var profileCont = new AccountController(account);
+                window.setContentPane(profileCont.getView());
+                window.pack();
+            });
+
+            window.setContentPane(login.getView());
+            window.pack();
+            window.setVisible(true);
+        });
+    }
+
+    public void logout() {
+        window.setContentPane(new JLabel("you're logged out"));
+        window.setVisible(false);
+    }
+}

src/me/teridax/jcash/banking/Account.java

@@ -64,4 +64,8 @@ public abstract class Account {
 
         return false;
     }
+
+    public String getDescription() {
+        return String.format("%s (%s)", iban, getClass().getSimpleName());
+    }
 }

src/me/teridax/jcash/banking/Bank.java

@@ -57,11 +57,11 @@ public final class Bank {
         return blz;
     }
 
-    public Optional<Account> getAccount(int iban) {
+    public Optional<Profile> getAccount(int iban) {
         for (var owner : this.accounts.entrySet()) {
             for (var account : owner.getValue()) {
                 if (account.getIban() == iban) {
-                    return Optional.of(account);
+                    return Optional.of(new Profile(owner.getKey(), this, account, getAccountsOfOwner(owner.getKey())));
                 }
             }
         }

src/me/teridax/jcash/banking/BankingManagementSystem.java

@@ -56,6 +56,6 @@ public final class BankingManagementSystem {
     }
 
     public Optional<Bank> getBank(String blz) {
-        return this.banks.stream().filter(b -> b.getBlz().equals(blz)).findFirst();
+        return this.banks.stream().filter(b -> !b.getBlz().equals(blz)).findFirst();
     }
 }

src/me/teridax/jcash/banking/Profile.java

@@ -0,0 +1,41 @@
+package me.teridax.jcash.banking;
+
+public class Profile {
+
+    private Owner owner;
+    private Bank bank;
+    private Account primaryAccount;
+    private Account[] accounts;
+
+    public Profile(Owner owner, Bank bank, Account account, Account[] accounts) {
+        this.owner = owner;
+        this.bank = bank;
+        this.accounts = accounts;
+        this.primaryAccount = account;
+    }
+
+    public Account getPrimaryAccount() {
+        return primaryAccount;
+    }
+
+    public Owner getOwner() {
+        return owner;
+    }
+
+    public Bank getBank() {
+        return bank;
+    }
+
+    public Account[] getAccounts() {
+        return accounts;
+    }
+
+    public void setPrimaryAccount(String description) {
+        for (Account account : accounts) {
+            if (account.getDescription().equals(description)) {
+                this.primaryAccount = account;
+                break;
+            }
+        }
+    }
+}

src/me/teridax/jcash/decode/Decoder.java

@@ -13,7 +13,7 @@ import static junit.framework.TestCase.assertEquals;
 public class Decoder {
 
     private static final Locale LOCALE = Locale.GERMANY;
-    private static final NumberFormat LOCAL_NUMBER_FORMAT = NumberFormat.getInstance(LOCALE);
+    public static final NumberFormat LOCAL_NUMBER_FORMAT = NumberFormat.getInstance(LOCALE);
 
     public static double decodePercent(String number) throws IllegalArgumentException, NullPointerException {
         Objects.requireNonNull(number);

src/me/teridax/jcash/gui/Loader.java

@@ -4,6 +4,7 @@ import me.teridax.jcash.banking.BankingManagementSystem;
 
 import javax.swing.*;
 import javax.swing.filechooser.FileNameExtensionFilter;
+import java.io.File;
 
 public class Loader {
 
@@ -16,6 +17,7 @@ public class Loader {
         fileChooser.setFileFilter(FILE_FILTER);
         fileChooser.setDialogType(JFileChooser.OPEN_DIALOG);
         fileChooser.setAcceptAllFileFilterUsed(false);
+        fileChooser.setCurrentDirectory(new File("/home/teridax/IdeaProjects/JCash/res"));
 
         if (fileChooser.showDialog(null, "Load database") == JFileChooser.APPROVE_OPTION) {
             try {

src/me/teridax/jcash/gui/account/AccountController.java

@@ -0,0 +1,33 @@
+package me.teridax.jcash.gui.account;
+
+import me.teridax.jcash.Main;
+import me.teridax.jcash.banking.Profile;
+
+public class AccountController {
+
+    private final AccountView view;
+
+    public AccountController(Profile profile) {
+        this.view = new AccountView();
+        this.view.setProfile(profile);
+
+        createListeners(profile);
+    }
+
+    private void createListeners(Profile profile) {
+        this.view.getAccountSelection().addActionListener(e -> {
+            var description = ((String) this.view.getAccountSelection().getSelectedItem());
+            profile.setPrimaryAccount(description);
+            this.view.setProfile(profile);
+        });
+
+        this.view.getLogout().addActionListener(e -> {
+            Main.getInstance().logout();
+            Main.getInstance().popLoginScreen();
+        });
+    }
+
+    public AccountView getView() {
+        return view;
+    }
+}

src/me/teridax/jcash/gui/account/AccountView.java

@@ -0,0 +1,169 @@
+package me.teridax.jcash.gui.account;
+
+import me.teridax.jcash.banking.*;
+import me.teridax.jcash.decode.Decoder;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class AccountView extends JPanel {
+
+    private JTextField iban;
+    private JTextField name;
+    private JTextField address;
+    private JTextField bankName;
+    private JTextField blz;
+    private JTextField type;
+    private JTextField typeSpecialProperty;
+    private JTextField balance;
+
+    private JLabel typeSpecialLabel;
+
+    private JComboBox<String> accountSelection;
+
+    private JPanel content;
+    private JPanel buttonPanel;
+
+    private JButton logout;
+    private JButton transfer;
+    private JButton deposit;
+    private JButton takeoff;
+
+    public AccountView() {
+        createComponents();
+        createLayout();
+
+        setBorder(BorderFactory.createEmptyBorder(8,8,8,8));
+    }
+
+    public void setProfile(Profile profile) {
+        var bank = profile.getBank();
+        var account = profile.getPrimaryAccount();
+        var owner = profile.getOwner();
+
+        this.blz.setText(bank.getBlz());
+        this.bankName.setText(bank.getName());
+
+        this.iban.setText(String.valueOf(account.getIban()));
+        this.name.setText(owner.getName() + " " + owner.getFamilyName());
+        this.address.setText(owner.getStreet() + " " + owner.getCity());
+
+        this.balance.setText(Decoder.LOCAL_NUMBER_FORMAT.format(account.getBalance()) + " €");
+
+        this.type.setText(account.getClass().getSimpleName());
+        if (account instanceof Girokonto) {
+            this.typeSpecialLabel.setText("Überziehungsbetrag");
+            this.typeSpecialProperty.setText( Decoder.LOCAL_NUMBER_FORMAT.format(((Girokonto) account).getOverdraft()) + " €");
+        } else if (account instanceof SavingsAccount) {
+            this.typeSpecialLabel.setText("Zinsbetrag");
+            this.typeSpecialProperty.setText( ((SavingsAccount) account).getInterest() + " %" );
+        }
+
+        this.accountSelection.removeAllItems();
+
+        for (var otherAccount : profile.getAccounts()) {
+            this.accountSelection.addItem(otherAccount.getDescription());
+        }
+        this.accountSelection.setSelectedItem(account.getDescription());
+    }
+
+    private void createLayout() {
+        setLayout(new BorderLayout(16, 16));
+        add(new JScrollPane(content), BorderLayout.CENTER);
+        add(buttonPanel, BorderLayout.SOUTH);
+
+        content.setLayout(new GridBagLayout());
+        var constraints = new GridBagConstraints();
+
+        constraints.gridwidth = 4;
+        constraints.insets = new Insets(12,12,12,12);
+
+        var accountSelectionPanel = new JPanel(new BorderLayout(12, 0));
+        accountSelectionPanel.add(iban, BorderLayout.CENTER);
+        accountSelectionPanel.add(accountSelection, BorderLayout.EAST);
+
+        addInputRow(constraints, content, accountSelectionPanel, 1, new JLabel("Kontonummer", SwingConstants.RIGHT));
+        addInputRow(constraints, content, name, 2, new JLabel("Vorname/Nachname", SwingConstants.RIGHT));
+        addInputRow(constraints, content, address, 3, new JLabel("Adresse", SwingConstants.RIGHT));
+        addInputRow(constraints, content, bankName, 4, new JLabel("Bank", SwingConstants.RIGHT));
+        addInputRow(constraints, content, blz, 5, new JLabel("BLZ", SwingConstants.RIGHT));
+        addInputRow(constraints, content, type, 6, new JLabel("Konto", SwingConstants.RIGHT));
+        addInputRow(constraints, content, typeSpecialProperty, 7, typeSpecialLabel);
+        addInputRow(constraints, content, balance, 8, new JLabel("Kontostand", SwingConstants.RIGHT));
+
+        var buttonRightPanel = new JPanel();
+        buttonRightPanel.add(transfer);
+        buttonRightPanel.add(deposit);
+        buttonRightPanel.add(takeoff);
+
+        buttonPanel.add(logout, BorderLayout.LINE_START);
+        buttonPanel.add(buttonRightPanel, BorderLayout.LINE_END);
+    }
+
+    private void createComponents() {
+        this.blz = new JTextField();
+        this.iban = new JTextField();
+        this.address = new JTextField();
+        this.bankName = new JTextField();
+        this.name = new JTextField();
+        this.type = new JTextField();
+        this.balance = new JTextField();
+        this.typeSpecialProperty = new JTextField();
+
+        this.blz.setEditable(false);
+        this.iban.setEditable(false);
+        this.address.setEditable(false);
+        this.bankName.setEditable(false);
+        this.name.setEditable(false);
+        this.type.setEditable(false);
+        this.balance.setEditable(false);
+        this.typeSpecialProperty.setEditable(false);
+
+        this.typeSpecialLabel = new JLabel("", SwingConstants.RIGHT);
+
+        this.accountSelection = new JComboBox<>();
+
+        this.content = new JPanel();
+        this.buttonPanel = new JPanel(new BorderLayout());
+
+        this.logout = new JButton("Abmelden");
+        this.transfer = new JButton("Überweisen");
+        this.deposit = new JButton("Einzahlen");
+        this.takeoff = new JButton("Abheben");
+    }
+
+    private void addInputRow(GridBagConstraints constraints, JComponent target, JComponent comp, int row, JLabel label) {
+        constraints.gridwidth = 1;
+        constraints.gridx = 1;
+        constraints.gridy = row;
+        constraints.weightx = 0;
+        constraints.fill = GridBagConstraints.HORIZONTAL;
+        target.add(label, constraints);
+
+        constraints.gridx = 2;
+        constraints.gridy = row;
+        constraints.weightx = 1;
+        constraints.fill = GridBagConstraints.HORIZONTAL;
+        target.add(comp, constraints);
+    }
+
+    public JComboBox<String> getAccountSelection() {
+        return accountSelection;
+    }
+
+    public JButton getLogout() {
+        return logout;
+    }
+
+    public JButton getTransfer() {
+        return transfer;
+    }
+
+    public JButton getDeposit() {
+        return deposit;
+    }
+
+    public JButton getTakeoff() {
+        return takeoff;
+    }
+}

src/me/teridax/jcash/gui/login/AccountSelectionListener.java

@@ -0,0 +1,8 @@
+package me.teridax.jcash.gui.login;
+
+import me.teridax.jcash.banking.Profile;
+
+public interface AccountSelectionListener {
+
+    void onAccountSelected(Profile account);
+}

src/me/teridax/jcash/gui/login/LoginController.java

@@ -3,6 +3,7 @@ package me.teridax.jcash.gui.login;
 import me.teridax.jcash.banking.Account;
 import me.teridax.jcash.banking.BankingManagementSystem;
 
+import javax.swing.*;
 import java.awt.event.ActionEvent;
 import java.util.Optional;
 
@@ -11,12 +12,11 @@ public class LoginController {
     private LoginView view;
     private LoginData data;
 
-    private Optional<Account> account;
+    private AccountSelectionListener listener;
 
     public LoginController(BankingManagementSystem bms) {
         this.view = new LoginView();
         this.data = new LoginData(bms);
-        this.account = Optional.empty();
 
         addActionListeners();
     }
@@ -46,13 +46,28 @@ public class LoginController {
         var blz = this.view.getBlz().getText();
         var iban = this.getIban();
         if (iban.isEmpty()) {
+            JOptionPane.showMessageDialog(null, "invalid IBAN", "Faulty login attempt", JOptionPane.ERROR_MESSAGE);
             return;
         }
         var pin = this.getPin();
         if (pin.isEmpty()) {
+            JOptionPane.showMessageDialog(null, "invalid pin", "Faulty login attempt", JOptionPane.ERROR_MESSAGE);
             return;
         }
 
-        this.account = this.data.authenticateAccount(blz, iban.get(), pin.get());
+        var account = this.data.authenticateAccount(blz, iban.get(), pin.get());
+        if (account.isPresent()) {
+            this.listener.onAccountSelected(account.get());
+        } else {
+            JOptionPane.showMessageDialog(null, "invalid login credentials", "Faulty login attempt", JOptionPane.ERROR_MESSAGE);
+        }
+    }
+
+    public void addAccountSelectionListener(AccountSelectionListener listener) {
+        this.listener = listener;
+    }
+
+    public LoginView getView() {
+        return view;
     }
 }

src/me/teridax/jcash/gui/login/LoginData.java

@@ -2,6 +2,7 @@ package me.teridax.jcash.gui.login;
 
 import me.teridax.jcash.banking.Account;
 import me.teridax.jcash.banking.BankingManagementSystem;
+import me.teridax.jcash.banking.Profile;
 
 import java.util.Optional;
 
@@ -13,12 +14,12 @@ public class LoginData {
         this.bms = bms;
     }
 
-    public Optional<Account> authenticateAccount(String blz, int iban, int pin) {
+    public Optional<Profile> authenticateAccount(String blz, int iban, int pin) {
         var optionalBank = bms.getBank(blz);
         if (optionalBank.isEmpty())
             return Optional.empty();
 
-        var account = optionalBank.get().getAccount(iban);
+        var profile = optionalBank.get().getAccount(iban);
-        return account.filter(value -> value.getPin() == pin);
+        return profile.filter(value -> value.getPrimaryAccount().getPin() == pin);
     }
 }

src/me/teridax/jcash/gui/login/LoginView.java

@@ -11,9 +11,9 @@ public class LoginView extends JPanel {
     private final JButton login;
 
     public LoginView() {
-        this.blz = new JTextField();
+        this.blz = new JTextField("MA2424");
-        this.iban = new JTextField();
+        this.iban = new JTextField("4711");
-        this.pin = new JPasswordField();
+        this.pin = new JPasswordField("1234");
         this.login = new JButton("Login");
 
         setLayout(new BorderLayout(16, 16));
@@ -27,7 +27,6 @@ public class LoginView extends JPanel {
         content.setLayout(layout);
 
         constraints.gridwidth = 4;
-
         constraints.insets = new Insets(12,12,12,12);
 
         addInputRow(constraints, content, blz, 1, "BLZ");
@@ -72,4 +71,5 @@ public class LoginView extends JPanel {
     public JButton getLogin() {
         return login;
     }
+
 }