CategoryFilter.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2013 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.publication.www;
 
import java.util.ArrayList;
import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.turro.string.Strings;
import org.turro.auth.Authentication;
import org.turro.elephant.context.ElephantContext;
import org.turro.elephant.context.IConstructor;
import org.turro.elephant.impl.navigation.DefaultNavigatorItem;
import org.turro.html.HTMLHelper;
import org.turro.i18n.I_;
import org.turro.plugin.contacts.IContact;
import org.turro.publication.db.PublicationPU;
import org.turro.publication.entity.PublicationCategory;
import org.turro.publication.util.PublicationCategories;
import org.turro.util.Converter;
 
public class CategoryFilter {
 
  private final IConstructor constructor;
  private final String uniqueId;
 
  private HTMLHelper html;
  private boolean blogger;
  
  public CategoryFilter(IConstructor constructor, String uniqueId) {
    this.constructor = constructor;
    this.uniqueId = uniqueId;
  }
 
  public boolean isBlogger() {
    return blogger;
  }
 
  public void setBlogger(boolean blogger) {
    this.blogger = blogger;
  }
  
  public Collection<PublicationCategory> getCategories(long groupId) {
    ArrayList<PublicationCategory> list = new ArrayList<>();
    IContact contact = Authentication.getIContact();
    list.addAll(PublicationCategories.getPublicCategories(contact));
    if(blogger) {
      list.addAll(PublicationCategories.getPrivateBloggerCategories(contact));
    }
    return list;
  }
 
  public Collection<DefaultNavigatorItem> pubCategories(String parameters, long groupId) {
    PublicationCategory selected = getCategory(constructor, uniqueId);
    ArrayList<DefaultNavigatorItem> cats = new ArrayList<>();
    
    cats.add(new DefaultNavigatorItem(I_.get("All categories"), parameters + "&category=0", null, selected == null));
    for(PublicationCategory pc : getCategories(groupId)) {
      cats.add(new DefaultNavigatorItem(pc.getName(), parameters + "&category=" + pc.getId(), null, selected != null && pc.getId() == selected.getId()));
    }
    return cats;
  }
  
  public void renderCategories(String parameters, long groupId) {
    PublicationCategory selected = getCategory(constructor, uniqueId);
    html = new HTMLHelper(constructor);
    html.startTag("div", "class='publication-categories'");
    if(selected == null) {
      html.setExtraAttributes("class='publication-category-selected'");
    } else {
      html.setExtraAttributes("class='publication-category'");
    }
    html.startAnchor(parameters + "&category=0", null)
            .write(I_.get("All categories"))
            .endTag();
    for(PublicationCategory pc : getCategories(groupId)) {
      if(selected != null && pc.getId() == selected.getId()) {
        html.setExtraAttributes("class='publication-category-selected'");
      } else {
        html.setExtraAttributes("class='publication-category'");
      }
      html.startAnchor(parameters + "&category=" + pc.getId(), null)
              .write(pc.getName())
              .endTag();
    }
    html.endAllTags();
  }
  
  public void processParameters() {
    String category = constructor.getParameter("category");
    try {
      if(!Strings.isBlank(category)) {
        long id = Converter.STANDARD.convert(category, Long.class, 0L);
        if(id == 0) {
          constructor.removeSessionAttribute("/publication-category/" + uniqueId);
        } else {
          constructor.setSessionAttribute("/publication-category/" + uniqueId, 
                new PublicationPU().find(PublicationCategory.class, id));
        }
      }
    } catch(Exception ex) {
      Logger.getLogger(CategoryFilter.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
    }
  }
 
  public static PublicationCategory getCategory(IConstructor constructor, String uniqueId) {
    return uniqueId == null ? null : (PublicationCategory) constructor.getSessionAttribute("/publication-category/" + uniqueId);
  }
  
}