TagCloud.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2021 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.tags;
 
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import org.turro.collections.KeyValueMap;
import org.turro.elephant.context.IConstructor;
import org.turro.marker.MarkerHelper;
 
public class TagCloud {
 
  private static final String TAGS_CONTEXT = "tag-cloud-ctx";
  
  public static TagSet getTags(IConstructor constructor, String root) {
    TagSet tags = (TagSet) constructor.getSessionAttribute(TAGS_CONTEXT + "-" + root);
    if(tags == null) {
      tags = Tags.getAvailables(root);
      constructor.setSessionAttribute(TAGS_CONTEXT + "-" + root, tags);
    }
    return tags;
  }
  
  public static void toggleTags(IConstructor constructor, String root) {
    KeyValueMap kvm = MarkerHelper.getObfuscatedParameters();
    if(kvm != null && kvm.containsKey("tag")) {
      TagSet set = (TagSet) constructor.getSessionAttribute(TAGS_CONTEXT + "-" + root);
      if(set != null) {
        set.toggle(kvm.get("tag"));
        set.markSiblingsFromSelection(root);
      }
    }
  }
  
  public static void resetContext(IConstructor constructor, String root) {
    constructor.removeSessionAttribute(TAGS_CONTEXT + "-" + root);
  }
  
  public static List<String> getIdentifiers(IConstructor constructor, String root) {
    TagSet set = (TagSet) constructor.getSessionAttribute(TAGS_CONTEXT + "-" + root);
    if(set != null) {
      return set.getIdentifiers(root);
    }
    return Collections.EMPTY_LIST;
  }
  
  public static List<Long> getIdentifiersAsLong(IConstructor constructor, String root) {
    return getIdentifiers(constructor, root).stream().map(s -> Long.valueOf(s)).collect(Collectors.toList());
  }
 
  public static boolean hasSelected(IConstructor constructor, String root) {
    TagSet set = (TagSet) constructor.getSessionAttribute(TAGS_CONTEXT + "-" + root);
    if(set != null) {
      return !(set.getSelected().isEmpty());
    }
    return false;
  }
  
}