HandshakeContract.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2015 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.financials.handshake;
 
import com.google.gson.Gson;
import java.io.File;
import java.io.IOException;
import java.util.Objects;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.turro.elephant.context.ElephantContext;
import org.turro.elephant.impl.util.FileUtil;
import org.turro.financials.db.FinancialsPU;
import org.turro.financials.entity.Company;
import org.turro.financials.entity.Contract;
import org.turro.financials.entity.ContractHandshake;
import org.turro.financials.model.business.CompanyWrapper;
import org.turro.jpa.Dao;
import org.turro.util.IdGenerator;
 
public class HandshakeContract {
  
  public final static String 
          HANDSHAKE_FOLDER = "/WEB-INF/handshake/contract";
 
  public String petitioner;
  public long remoteId;
  public String remoteName;
  public String remoteServer;
 
  public static String createJsonFromContract(Contract contract) {
    HandshakeContract hc = createHandshakeFromContract(contract);
    if(hc != null) {
      return new Gson().toJson(hc);
    }
    return null;
  }
  
  public static HandshakeContract createHandshakeFromContract(Contract contract) {
    Company company = CompanyWrapper.getDefaultCompany();
    if(company != null) {
      HandshakeContract hc = new HandshakeContract();
      hc.petitioner = company.getName();
      hc.remoteServer = ElephantContext.getServerUrl("http");
      hc.remoteId = contract.getId();
      hc.remoteName = contract.getName();
      return hc;
    }
    return null;
  }
  
  public static HandshakeContract createHandshakeFromJson(String value) {
    return new Gson().fromJson(value, HandshakeContract.class);
  }
  
  public static HandshakeContract createHandshakeFromFile(File file) {
    try {
      return createHandshakeFromJson(FileUtil.getContent(file));
    } catch (IOException ex) {
      Logger.getLogger(HandshakeContract.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
    }
    return null;
  }
  
  public static void saveHandshakeToFile(File file, HandshakeContract hc) {
    try {
      FileUtil.setContent(file, new Gson().toJson(hc));
    } catch (IOException ex) {
      Logger.getLogger(HandshakeContract.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
    }
  }
  
  public static Contract getContractFromRemoteContract(String value) {
    HandshakeContract hc = createHandshakeFromJson(value);
    return getContractFromHandshake(hc);
  }
  
  public static Contract getContractFromHandshake(HandshakeContract hc) {
    ContractHandshake ch = getContractHandshakeFromHandshake(hc);
    return ch != null ? ch.getContract() : null;
  }
 
  public static ContractHandshake getContractHandshakeFromHandshake(HandshakeContract hc) {
    Dao dao = new FinancialsPU();
    return (ContractHandshake) dao.getSingleResultOrNull(
            "select ch from ContractHandshake ch " +
            "where ch.remoteServer = ? " +
            "and ch.remoteId = ?",
            new Object[] {
              hc.remoteServer,
              hc.remoteId
            });
  }
  
  public static void saveHandshakePetition(HandshakeContract hc) {
    if(!existsHandshake(hc)) {
      File file = new File(ElephantContext.getRealPath(HANDSHAKE_FOLDER) + "/contract" + IdGenerator.generate() + ".handshake");
      saveHandshakeToFile(file, hc);
    }
  }
 
  public static boolean existsHandshake(HandshakeContract hc) {
    File folder = new File(ElephantContext.getRealPath(HANDSHAKE_FOLDER));
    if(!folder.exists()) { folder.mkdirs(); }
    for(File file : folder.listFiles()) {
      HandshakeContract fhc = createHandshakeFromFile(file);
      if(hc.equals(fhc)) {
        return true;
      }
    }
    return false;
  }
 
  public static boolean updateRemoteId(String remoteServer, String remoteId, long contractId) {
    Dao dao = new FinancialsPU();
    return dao.executeUpdate(
            "update ContractHandshake " +
            "set remoteId = ? " +
            "where remoteServer = ? " +
            "and contract.id = ?",
            new Object[] {
              contractId,
              remoteServer,
              Long.valueOf(remoteId)
            }) > 0;
  }
 
  @Override
  public int hashCode() {
    int hash = 7;
    hash = 89 * hash + (int) (this.remoteId ^ (this.remoteId >>> 32));
    hash = 89 * hash + Objects.hashCode(this.remoteServer);
    return hash;
  }
 
  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    final HandshakeContract other = (HandshakeContract) obj;
    if (this.remoteId != other.remoteId) {
      return false;
    }
    if (!Objects.equals(this.remoteServer, other.remoteServer)) {
      return false;
    }
    return true;
  }
 
}