ForumIndicator.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2020 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.indicator;
 
import java.util.stream.Stream;
import org.turro.annotation.ElephantIndicator;
import org.turro.elephant.db.ElephantPU;
import org.turro.elephant.db.WhereClause;
import org.turro.jpa.Dao;
import org.turro.matching.GenericMatching;
import org.turro.matching.IMatching;
import org.turro.ranking.GenericRanking;
import org.turro.ranking.IRanking;
 
@ElephantIndicator
public class ForumIndicator extends AbstractIndicator {
 
  public ForumIndicator() {
    root = "forum";
  }
 
  @Override
  protected void initVariables() {
    addVariable("topics", true, VariableType.BOTH_VARIABLE);
    addVariable("posts", true, VariableType.BOTH_VARIABLE);
  }
 
  @Override
  protected void initExternalVariables() {
  }
  
  @Override
  protected Dao createDao() {
    return new ElephantPU();
  }
 
  @Override
  protected void processRankingVariable(Dao dao, IPreprocessor preprocessor, IndicatorVariable variable, String entityRoot) {
    WhereClause wc = null;
    if("contact".equals(entityRoot)) {
      switch(variable.getName()) {
        case "topics":
          wc = PreprocessClause.load("Topic")
                  .setRankingRoot(entityRoot)
                  .setRankingField("concat('/contact/', authorId)")
                  .setVariable(variable)
                  .setAggregate("count(id)")
                  .getClause();
          break;
        case "posts":
          wc = PreprocessClause.load("Post")
                  .setRankingRoot(entityRoot)
                  .setRankingField("concat('/contact/', authorId)")
                  .setVariable(variable)
                  .setAggregate("count(id)")
                  .getClause();
          break;
      }
    } else {
      switch(variable.getName()) {
        case "topics":
          wc = PreprocessClause.load("Topic")
                  .setRankingRoot(entityRoot)
                  .setRankingField("entityPath")
                  .setVariable(variable)
                  .setAggregate("count(id)")
                  .getClause();
          break;
        case "posts":
          wc = PreprocessClause.load("Post")
                  .setRankingRoot(entityRoot)
                  .setRankingField("topic.entityPath")
                  .setVariable(variable)
                  .setAggregate("count(id)")
                  .getClause();
          break;
      }
    }
    if(wc != null) {
      try(Stream<GenericRanking> stream = dao.stream(GenericRanking.class, wc, 1000)) {
        stream.forEach(r -> {
          preprocessor.poolInstance(r.copyTo((IRanking) preprocessor.createInstance()));
        });
        preprocessor.finishPreprocessor();
      }
    }
  }
 
  @Override
  protected void processMatchingVariable(Dao dao, IPreprocessor preprocessor, IndicatorVariable variable, String entityRoot, String relatedRoot) {
    WhereClause wc = null;
    if("contact".equals(relatedRoot)) {
      switch(variable.getName()) {
        case "topics":
          wc = PreprocessClause.load("Topic")
                  .setRankingRoot(entityRoot)
                  .setMatchingRoot(relatedRoot)
                  .setRankingField("entityPath")
                  .setMatchingField("authorId")
                  .setVariable(variable)
                  .setAggregate("count(id)")
                  .getClause();
          break;
        case "posts":
          wc = PreprocessClause.load("Post")
                  .setRankingRoot(entityRoot)
                  .setMatchingRoot(relatedRoot)
                  .setRankingField("topic.entityPath")
                  .setMatchingField("authorId")
                  .setVariable(variable)
                  .setAggregate("count(id)")
                  .getClause();
          break;
      }
    }
    if(wc != null) {
      try(Stream<GenericMatching> stream = dao.stream(GenericMatching.class, wc, 1000)) {
        stream.forEach(m -> {
          preprocessor.poolInstance(m.copyTo((IMatching) preprocessor.createInstance()));
        });
        preprocessor.finishPreprocessor();
      }
    }
  }
 
}