package authoritymanager.server;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Hashtable;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;

import gwtupload.server.UploadAction;
import gwtupload.server.exceptions.UploadActionException;

public class SampleUploadServlet extends UploadAction {

	  /**
	   * Maintain a list with received files and their content types 
	   */
	  Hashtable<String, File> receivedFiles = new Hashtable<String, File>();
	  Hashtable<String, String> receivedContentTypes = new Hashtable<String, String>();

	  /**
	   * Override executeAction to save the received files in a custom place
	   * and delete this items from session.  
	   */
	  @Override
	  public String executeAction(HttpServletRequest request, List<FileItem> sessionFiles) throws UploadActionException {
	    System.out.println("executeAction") ;
		  for (FileItem item : sessionFiles) {
	      if (false == item.isFormField()) {
	        try {
	        	//System.out.println(ServerServiceImpl.PATH) ;
	          File file = new File(item.getName()) ;
	          //item.File.createTempFile("upload-", ".bin", new File("/tmp"));
	          item.write(file);
	          receivedFiles.put(item.getFieldName(), file);
	          receivedContentTypes.put(item.getFieldName(), item.getContentType());
	        } catch (Exception e) {
	          throw new UploadActionException(e.getMessage());
	        }
	      }
	      removeSessionFileItems(request);
	    }
	    return null;
	  }
	  
	  /**
	   * Remove a file when the user sends a delete request
	   */
	  @Override
	  public void removeItem(HttpServletRequest request, String fieldName)  throws UploadActionException {
		  System.out.println("removeItem") ;
		  File file = receivedFiles.get(fieldName);
		  receivedFiles.remove(fieldName);
	    receivedContentTypes.remove(fieldName);
	    if (file != null)  file.delete();
	  }
	  
	  /**
	   * Get the content of an uploaded file
	   */
	  @Override
	  public void getUploadedFile(HttpServletRequest request, HttpServletResponse response) throws IOException {
		  System.out.println("getUploadedFile") ;
		  String fieldName = request.getParameter(PARAM_SHOW);
	    File f = receivedFiles.get(fieldName);
	    if (f != null) {
	      response.setContentType(receivedContentTypes.get(fieldName));
	      FileInputStream is = new FileInputStream(f);
	      copyFromInputStreamToOutputStream(is, response.getOutputStream());
	    } else {
	      renderXmlResponse(request, response, ERROR_ITEM_NOT_FOUND);
	   }
	  }

	}