implemented controller repo and model

src/main/java/at/ionas999/adressbook/controller/AddressBookController.java

@@ -1,10 +1,15 @@
 package at.ionas999.adressbook.controller;
 
+import at.ionas999.adressbook.models.Contact;
+import javafx.collections.FXCollections;
+import javafx.collections.ListChangeListener;
+import javafx.collections.ObservableList;
+import javafx.collections.transformation.FilteredList;
 import javafx.event.ActionEvent;
-import javafx.scene.control.Button;
-import javafx.scene.control.Label;
-import javafx.scene.control.ListView;
-import javafx.scene.control.TextField;
+import javafx.scene.control.*;
+import javafx.scene.control.Alert.AlertType;
+
+import java.util.function.Predicate;
 
 public class AddressBookController {
     public TextField searchBox;
@@ -13,19 +18,91 @@ public class AddressBookController {
     public TextField phoneField;
     public TextField emailField;
     public Label labelContactAmount;
-    public ListView contactView;
+    public ListView<Contact> contactView;
     public Button searchButton;
 
-    public void searchButtonClickEvent(ActionEvent actionEvent) {
+    private final ObservableList<Contact> contacts = FXCollections.observableArrayList();
+    private final FilteredList<Contact> filteredContacts = new FilteredList<>(contacts);
+
+    public void initialize() {
+        contactView.setItems(filteredContacts);
+
+        contacts.addListener((ListChangeListener<? super Contact>) (observable) -> updateContactCount());
+        updateContactCount();
+    }
+
+    private Predicate<Contact> createFilterPredicate(String searchText) {
+        if (searchText == null || searchText.isBlank()) {
+            return contact -> true;
+        }
+        String lowerCaseSearchText = searchText.toLowerCase();
+        return contact -> contact.getName().toLowerCase().contains(lowerCaseSearchText) ||
+                contact.getEmail().toLowerCase().contains(lowerCaseSearchText);
+    }
+
+    private void updateContactCount() {
+        labelContactAmount.setText("Contacts: " + contacts.size());
     }
 
     public void addContactButtonClickEvent(ActionEvent actionEvent) {
-        
+        try {
+            String name = nameField.getText();
+            String phone = phoneField.getText();
+            String email = emailField.getText();
+            Contact newContact = new Contact(name, phone, email);
+            contacts.add(newContact);
+            clearInputFields();
+        } catch (IllegalArgumentException e) {
+            showAlert("Error", e.getMessage());
+        }
     }
 
     public void deleteContactButtonClickEvent(ActionEvent actionEvent) {
+        Contact selectedContact = contactView.getSelectionModel().getSelectedItem();
+        if (selectedContact != null) {
+            contacts.remove(selectedContact);
+        } else {
+            showAlert("Error", "No contact selected for deletion.");
+        }
     }
 
     public void saveButtonClickEvent(ActionEvent actionEvent) {
+        Contact selectedContact = contactView.getSelectionModel().getSelectedItem();
+        if (selectedContact != null) {
+            try {
+                selectedContact.setName(nameField.getText());
+                selectedContact.setPhone(phoneField.getText());
+                selectedContact.setEmail(emailField.getText());
+                refreshListView();
+            } catch (IllegalArgumentException e) {
+                showAlert("Error", e.getMessage());
+            }
+        } else {
+            showAlert("Error", "No contact selected for saving.");
+        }
     }
-}
+
+    public void searchButtonClickEvent(ActionEvent actionEvent) {
+        String searchText = searchBox.getText();
+        filteredContacts.setPredicate(createFilterPredicate(searchText));
+    }
+
+    private void refreshListView() {
+        contactView.setItems(null);
+        contactView.setItems(filteredContacts);
+    }
+
+    private void clearInputFields() {
+        idField.clear();
+        nameField.clear();
+        phoneField.clear();
+        emailField.clear();
+    }
+
+    private void showAlert(String title, String message) {
+        Alert alert = new Alert(AlertType.ERROR);
+        alert.setTitle(title);
+        alert.setContentText(message);
+        alert.showAndWait();
+    }
+}

src/main/java/at/ionas999/adressbook/models/Contact.java

@@ -0,0 +1,59 @@
+package at.ionas999.adressbook.models;
+
+import java.util.regex.Pattern;
+
+public class Contact {
+    private static int contactCounter = 0;
+    private static final Pattern emailPattern = Pattern.compile("^[\\w.%+-]+@[\\w.-]+\\.[a-zA-Z]{2,}$");
+    private static final Pattern phonePattern = Pattern.compile("^\\+?[0-9-]+$");
+
+    private final int id = Contact.contactCounter++;
+    private String name;
+    private String phone;
+    private String email;
+
+    public Contact(String name, String phone, String email) {
+        this.setEmail(email);
+        this.setName(name);
+        this.setPhone(phone);
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setPhone(String phone) {
+        if (!phonePattern.matcher(phone).matches()) {
+            throw new IllegalArgumentException("Invalid phone number format");
+        }
+        this.phone = phone;
+    }
+
+    public void setEmail(String email) {
+        if (!emailPattern.matcher(email).matches()) {
+            throw new IllegalArgumentException("Invalid email address format");
+        }
+        this.email = email;
+    }
+    @Override
+    public String toString()
+    {
+        return this.name;
+    }
+}

src/main/java/at/ionas999/adressbook/repository/AddressBook.java

@@ -0,0 +1,40 @@
+package at.ionas999.adressbook.repository;
+
+import at.ionas999.adressbook.models.Contact;
+import javafx.beans.property.SimpleIntegerProperty;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+
+public class AddressBook {
+    private static AddressBook instance;
+    private ObservableList<Contact> list;
+
+    private AddressBook() {
+        list = FXCollections.observableArrayList();
+    }
+
+    public static AddressBook getInstance() {
+        if (AddressBook.instance == null) {
+            AddressBook.instance = new AddressBook();
+        }
+        return instance;
+    }
+
+    public ObservableList<Contact> getContacts() {
+        return FXCollections.unmodifiableObservableList(list);
+    }
+
+    public void addContact(Contact contact) {
+        list.add(contact);
+    }
+
+    public void removeContact(Contact contact) {
+        list.remove(contact);
+    }
+
+    public SimpleIntegerProperty getAmount() {
+        SimpleIntegerProperty amount = new SimpleIntegerProperty();
+        amount.bind(javafx.beans.binding.Bindings.size(list));
+        return amount;
+    }
+}

src/main/java/module-info.java

@@ -2,7 +2,7 @@ module at.ionas999.adressbook {
     requires javafx.controls;
     requires javafx.fxml;
 
-    opens at.ionas999.adressbook to javafx.fxml;
+    opens at.ionas999.adressbook.controller to javafx.fxml;
+
     exports at.ionas999.adressbook;
-    exports at.ionas999.adressbook.controller to javafx.fxml;
 }