/**
    * 
    */
   package de.tivsource.page.restore;
   
   import java.io.BufferedReader;
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.InputStreamReader;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.Iterator;
  
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  import de.tivsource.page.dao.administration.RoleDaoLocal;
  import de.tivsource.page.entity.administration.Role;
  
  /**
   * @author Marc Michele
   *
   */
  public class RestoreRole {
  
      /**
       * Statischer Logger der Klasse.
       */
      private static final Logger LOGGER = LogManager.getLogger(RestoreRole.class);
  
      private RoleDaoLocal roleDaoLocal;
  
      public RestoreRole(RoleDaoLocal roleDaoLocal) {
          super();
          this.roleDaoLocal = roleDaoLocal;
      }
  
      public void generate(InputStream inputStream) {
          LOGGER.info("generate(InputStream inputStream) aufgerufen.");
          cleanup();
          BufferedReader in = new BufferedReader(new InputStreamReader(inputStream));
          try {
              String line = null;
              while ((line = in.readLine()) != null) {
                  if (!line.startsWith("[Format Definition]")) {
                      Role role = convert(line);
                      roleDaoLocal.merge(role);
                  }
              }
          } catch (IOException e) {
              e.printStackTrace();
          }
  
      }// Ende generate()
  
      private Role convert(String line) {
          // Zerlege CSV-Zeile in String-Array.
          String[] items = line.split("\\|");
  
          Role role = new Role();
          role.setUuid(items[0]);
          role.setTechnical(items[1]);
          role.setCreated(convertDateString(items[2]));
          role.setModified(convertDateString(items[3]));
          role.setModifiedBy(items[4]);
          role.setModifiedAddress(items[5]);
  
          return role;
      }
  
      /**
       * Methode zum Konvertieren eines Strings des Formates "1970-12-01 23:59:59" in ein Date-Object. 
       * @param dateString
       * @return
       */
      private Date convertDateString(String dateString) {
          SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
          try {
              return simpleDateFormat.parse(dateString);
          } catch (ParseException e) {
              return new Date();
          }
      }// Ende convertDateString(String dateString)
  
      private void cleanup() {
          if(roleDaoLocal.countAll() > 0) {
              Iterator<Role> roleIterator = roleDaoLocal.findAll(0, roleDaoLocal.countAll()).iterator();
              while(roleIterator.hasNext()) {
                  Role next = roleIterator.next();
                  next.setUsers(null);
                  roleDaoLocal.merge(next);
                  roleDaoLocal.delete(next);
              }
          }
      }// Ende cleanup()
      
  }// Ende class