Secs.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2022 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.security;
 
import java.util.List;
import java.util.Optional;
import java.util.Set;
import org.turro.string.Strings;
import org.turro.contacts.db.ContactsPU;
import org.turro.elephant.db.WhereClause;
import org.turro.jpa.Dao;
 
public class Secs {
 
  public static SecSet search(String root, String value, int max) {
    Dao dao = new ContactsPU();
    WhereClause wc = new WhereClause();
    wc.addClause("select new org.turro.security.SecItem(s.name, count(s))");
    wc.addClause("from Syndication s");
    wc.addClause("where 1=1");
    if(!Strings.isBlank(value)) {
      wc.addLikeFields(new String[]{ "s.name" }, value.toString());
    }
    wc.addClause("group by s.name");
    wc.addClause("order by s.name");
    return new SecSet(dao.getResultList(wc, max));
  }
  
  public static SecSet getAvailables() {
    Dao dao = new ContactsPU();
    WhereClause wc = new WhereClause();
    wc.addClause("select new org.turro.security.SecItem(s.name, count(s))");
    wc.addClause("from Syndication s");
    wc.addClause("where 1=1");
    wc.addClause("group by s.name");
    return new SecSet(dao.getResultList(wc));
  }
  
  public static SecSet getSiblings(Set<String> secNames) {
    Dao dao = new ContactsPU();
    SecSet finalSet = null;
    for(String sec : secNames) {
      SecSet set = getSiblings(dao, sec);
      if(finalSet != null) {
        finalSet.retainAll(set);
      } else {
        finalSet = set;
      }
    }
    return Optional.ofNullable(finalSet).orElseGet(() -> SecSet.empty());
  }
  
  private static SecSet getSiblings(Dao dao, String secName) {
    WhereClause wc = new WhereClause();
    wc.addClause("select new org.turro.security.SecItem(s.name, count(s))");
    wc.addClause("from Syndication s");
    wc.addClause("join Syndication s1 on s.contact = s1.contact");
    wc.addClause("where s.name <> :sec");
    wc.addClause("and s1.name = :sec");
    wc.addNamedValue("sec", secName);
    wc.addClause("group by s.name");
    return new SecSet(dao.getResultList(wc));
  }
  
  public static List<String> getIdentifiers(Dao dao, Set<SecItem> sets) {
    WhereClause wc = new WhereClause();
    wc.addClause("select distinct s.contact.id from Syndication s");
    wc.addClause("where 1=1");
    int count = 0;
    for(SecItem sec : sets) {
      wc.addClause("and exists (");
      wc.addClause("select s.name from Syndication s2");
      wc.addClause("where s2.contact = s.contact");
      wc.addClause("and s2.name = :name" + count);
      wc.addNamedValue("name" + count, sec.getSecName());
      wc.addClause(")");
      count++;
    }
    return dao.getResultList(String.class, wc);
  }
  
  public static void removeSyndication(Dao dao, String syndication) {
    WhereClause wc = new WhereClause();
    wc.addClause("delete from Syndication s");
    wc.addClause("where s.name = :name");
    wc.addNamedValue("name", syndication);
    dao.executeUpdate(wc);
  }
  
  private Secs() {}
  
}