package com.infinity.bpm.portal.common.table.export;

import java.io.File;
import java.util.Date;

import javax.faces.context.FacesContext;

import com.icesoft.faces.component.dataexporter.ExcelOutputHandler;
import com.icesoft.faces.util.CoreUtils;

/**
 * @author Subodh.Godbole
 *
 */
public class CustomExcelExporter extends ExcelOutputHandler
{
   private final static String EXPORT_FOLDER = "export";
   private final static String EXPORT_FILE_PREFIX = "export_";

   private boolean used;

   /**
    * @param dataTable
    * @param dataTableExportHandler
    */
   public CustomExcelExporter()
   {
      super(getExportFilePath(ExportType.EXCEL), FacesContext.getCurrentInstance(), "WorkSheet");
   }

   @Override
   public void writeCell(Object output, int col, int row)
   {
      super.writeCell(output, col, row);
      used = true;
   }

   @Override
   public void writeHeaderCell(String text, int col)
   {
      super.writeHeaderCell(text, col);
   }

   @Override
   public void flushFile()
   {
      super.flushFile();
   }

   public boolean isUsed()
   {
      return used;
   }

   /**
    * @param exportType
    * @return
    */
   public static String getExportFilePath(ExportType exportType)
   {
      String exportDirPath = CoreUtils.getRealPath(FacesContext.getCurrentInstance(), (File.separator + EXPORT_FOLDER));
      File exportDir = new File(exportDirPath);
      if (!exportDir.exists())
      {
         exportDir.mkdirs();
      }

      String exportFilePath = exportDir + File.separator + EXPORT_FILE_PREFIX + new Date().getTime()
            + exportType.getExtension();
      return exportFilePath;
   }
}