/**
    * This file Copyright (c) 2013 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.security.app.dialog.field;
  
  import info.magnolia.context.MgnlContext;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.jcr.util.SessionUtil;
  import info.magnolia.repository.RepositoryConstants;
  import info.magnolia.ui.form.field.definition.SelectFieldDefinition;
  import info.magnolia.ui.form.field.definition.SelectFieldOptionDefinition;
  
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Locale;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Field definition that returns the languages defined under <code>CONFIG:/server/i18n/system/languages</code> as options.
   */
  public class SystemLanguagesFieldDefinition extends SelectFieldDefinition {
  
      public static final String SYSTEM_LANGUAGES_PATH = "/server/i18n/system/languages";
      private static final Logger log = LoggerFactory.getLogger(SystemLanguagesFieldDefinition.class);
  
      @Override
      public List<SelectFieldOptionDefinition> getOptions() {
          List<SelectFieldOptionDefinition> options = new LinkedList<SelectFieldOptionDefinition>();
  
          Node systemLanguages = SessionUtil.getNode(RepositoryConstants.CONFIG, SYSTEM_LANGUAGES_PATH);
          if (systemLanguages == null) {
              log.error("Cannot load system languages definition from [{}], check the system configuration.", SYSTEM_LANGUAGES_PATH);
          } else {
              try {
                  Locale currentLocale = MgnlContext.getLocale();
                  for (Node language : NodeUtil.getNodes(systemLanguages)) {
                      if (language.hasProperty("enabled") && language.getProperty("enabled").getBoolean()) {
                          SelectFieldOptionDefinition option = new SelectFieldOptionDefinition();
                          option.setValue(language.getName());
                          // get either the language code from property, or first two characters from the node name
                          String langCode = language.hasProperty("language") ? language.getProperty("language").getString() : language.getName().substring(0, 2);
                          String countryCode = language.hasProperty("country") ? language.getProperty("country").getString() : "";
                          Locale locale = new Locale(langCode, countryCode);
                          String label = locale.getDisplayLanguage(currentLocale);
                          if (!"".equals(countryCode)) {
                              label += " (" + locale.getDisplayCountry(currentLocale) + ")";
                          }
                          option.setLabel(label);
                          options.add(option);
                      }
                  }
              } catch (RepositoryException e) {
                  log.error("Cannot load system languages from [{}]: {}", SYSTEM_LANGUAGES_PATH, e.getMessage());
              }
          }
  
          return options;
      }
  
  }