/*
 * This is eMonocot, a global online biodiversity information resource.
 *
 * Copyright © 2011–2015 The Board of Trustees of the Royal Botanic Gardens, Kew and The University of Oxford
 *
 * eMonocot 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.
 *
 * eMonocot 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.
 *
 * The complete text of the GNU Affero General Public License is in the source repository as the file
 * ‘COPYING’.  It is also available from <http://www.gnu.org/licenses/>.
 */
package org.emonocot.harvest.job.dwc.image;

import java.io.File;
import java.util.List;

import org.emonocot.model.Image;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.item.ItemWriter;


/**
 * @author jk00kg
 *
 */
public class ImageFileDeletingWriter implements ItemWriter<Image> {

	private Logger logger = LoggerFactory.getLogger(ImageFileDeletingWriter.class);

	/**
	 *
	 */
	private String imageDirectory;

	/**
	 * @param imageDirectory the imageDirectory to set
	 */
	public void setImageDirectory(String imageDirectory) {
		this.imageDirectory = imageDirectory;
	}

	/* (non-Javadoc)
	 * @see org.springframework.batch.item.ItemWriter#write(java.util.List)
	 */
	@Override
	public void write(List<? extends Image> items) throws Exception {
		for(Image i : items) {
			File file = new File(imageDirectory + File.separator + i.getId() + "." + i.getFormat());
			if(!file.exists()){
				logger.warn("Tried to delete non-existent file" + file.getCanonicalPath()
						+ " for image" + i);
			} else {
				try{
					file.delete(); //Don't worry about successfulness
				} catch (SecurityException e) {
					logger.error("The file " + file + " cannot be deleted.");
					throw e;
				}
			}
			file = new File(imageDirectory + File.separator + "thumbnails" + File.separator + i.getId() + "." + i.getFormat());
			if(!file.exists()){
				logger.warn("Tried to delete non-existent file" + file.getCanonicalPath()
						+ " for image" + i);
			} else {
				try{
					file.delete(); //Don't worry about successfulness
				} catch (SecurityException e) {
					logger.error("The file " + file + " cannot be deleted.");
					throw e;
				}
			}
		}

	}

}