Pegasus/src/controllers/FlightController.java

package controllers;

import java.time.Duration;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;

import javafx.scene.control.Alert;
import javafx.scene.control.Control;

public class FlightController {
    private DateTimeFormatter timeFormatter = DateTimeFormatter.ofPattern("HH:mm");

    public double calculateFlightDuration(String abflugzeit, String ankunftszeit) throws DateTimeParseException {
        LocalTime start = LocalTime.parse(abflugzeit, timeFormatter);
        LocalTime end = LocalTime.parse(ankunftszeit, timeFormatter);
        return (double) Duration.between(start, end).toMinutes() / 60;
    }

    public boolean isValidTime(String time) {
        try {
            LocalTime.parse(time, timeFormatter);
            return true;
        } catch (DateTimeParseException e) {
            return false;
        }
    }

    public void setErrorStyle(Control field) {
        field.setStyle("-fx-border-color: red;");
    }

    public void clearFieldStyles(Control... fields) {
        for (Control field : fields) {
            field.setStyle(null);
        }
    }

    public void showAlert(String title, String message) {
        Alert alert = new Alert(Alert.AlertType.ERROR);
        alert.setTitle(title);
        alert.setHeaderText(null);
        alert.setContentText(message);
        alert.showAndWait();
    }
}