Links.java

package de.flower.rmt.ui.app;

import de.flower.common.ui.util.SessionUtils;
import de.flower.common.util.Collections;
import org.apache.commons.lang3.StringUtils;
import org.apache.wicket.Component;
import org.apache.wicket.markup.html.link.AbstractLink;
import org.apache.wicket.markup.html.link.ExternalLink;
import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.protocol.http.WebApplication;

import javax.mail.internet.InternetAddress;
import java.net.URLEncoder;
import java.util.List;

/**
 * @author flowerrrr
 */
public class Links {

    /**
     * @return /das-tool
     */
    public static AbstractLink contextRoot(final String id) {
        return new ExternalLink(id, WebApplication.get().getServletContext().getContextPath());
    }

    public static ExternalLink mailLink(String id, String emailAddress, boolean label) {
        ExternalLink link = mailLink(id, emailAddress, label ? emailAddress : null);
        return link;
    }

    public static ExternalLink mailLink(final String id, String emailAddress, final String label) {
        if (label == null) {
            return new ExternalLink(id, "mailto:" + emailAddress);
        } else {
            return new ExternalLink(id, "mailto:" + emailAddress, label);
        }
    }

    public static ExternalLink mailLink(final String id, final IModel<List<InternetAddress>> listModel) {
        IModel<String> hrefModel = new AbstractReadOnlyModel<String>() {
            @Override
            public String getObject() {
                List<InternetAddress> emailAddresses = listModel.getObject();
                List<String> stringList = Collections.convert(emailAddresses,
                        new Collections.IElementConverter<InternetAddress, String>() {
                            @Override
                            public String convert(final InternetAddress ia) {
                                // fix for RMT-614 (umlaute pose problems in mailto-links)
                                return ia.getAddress();
                                // return ia.toString();
                            }
                        });
                String href = StringUtils.join(stringList, getAddressDelimiter());
                return "mailTo:" + URLEncoder.encode(href);
            }
        };
        return new ExternalLink(id, hrefModel);
    }

    private static String getAddressDelimiter() {
        // outlook likes ';', iphone mail client prefers ','. but according to most sources ';' is correct when used in mailto.
        // could try to detect user agent
        String userAgent = SessionUtils.getUserAgent();
        String DEFAULT = ";";
        String MAC = ",";
        if (userAgent.toLowerCase().contains("windows")) {
            return DEFAULT;
        } else if (userAgent.toLowerCase().contains("mac")) {
            return MAC;
        } else {
            return DEFAULT;
        }
    }

    public static Component logoutLink(final String id) {
        return new ExternalLink(id, "/j_spring_security_logout").setContextRelative(true);
    }
}