ParticipationWalker.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.assistant;
 
import java.util.function.Consumer;
import org.turro.elephant.db.ElephantPU;
import org.turro.elephant.db.WhereClause;
import org.turro.entities.Entities;
import org.turro.entities.ITreeEntity;
import org.turro.jpa.Dao;
import org.turro.participation.ParticipationReason;
import org.turro.plugin.contacts.IContact;
 
public class ParticipationWalker {
 
  /* Walk up */
  
  public void walkUpTree(ITreeEntity entity, Consumer<ITreeEntity> execute) {
    if(entity != null) {
      execute.accept(entity);
      walkUpTree(entity.getEntityParent(), execute);
    }
  }
          
  /* Walk down */
    
  public <T> void walkDownTree(ITreeEntity entity, Consumer<ITreeEntity> execute) {
    if(entity != null) {
      execute.accept(entity);
      for(ITreeEntity e : entity.getEntityChildren()) {
        walkDownTree(e, execute);
      }
    }
  }
          
  /* Utilities */
  
  public void deleteExceptFor(Object entity, IContact contact, ParticipationReason reason) {
    WhereClause wc = new WhereClause();
    wc.addClause("delete from EntityParticipation");
    wc.addClause("where entityPath = :entityPath");
    wc.addNamedValue("entityPath", Entities.getController(entity).getPath());
    wc.addClause("and participatorPath <> :participatorPath");
    wc.addNamedValue("participatorPath", Entities.getController(contact.getContact()).getPath());
    wc.addClause("and reason = :reason");
    wc.addNamedValue("reason", reason);
    getDao().executeUpdate(wc);
  }
  
  public void createFor(Object entity, IContact contact, ParticipationReason reason) {
    new ParticipationInfo(entity, contact, reason).check();
  }
  
  /* Dao */
  
  private Dao _dao;
  
  private Dao getDao() {
    if(_dao == null) {
      _dao = new ElephantPU();
    }
    return _dao;
  }
 
}