/*

    Copyright (C) 2022 AGNITAS AG (https://www.agnitas.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 <https://www.gnu.org/licenses/>.

*/

package com.agnitas.web.mvc;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import org.springframework.core.io.FileSystemResource;

public class DeleteFileAfterSuccessReadResource extends FileSystemResource {

    public DeleteFileAfterSuccessReadResource(File file) {
        super(file);
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return new DeleteWhenCloseFileInputStream(super.getFile());
    }

    private static final class DeleteWhenCloseFileInputStream extends FileInputStream {

        private File file;

        DeleteWhenCloseFileInputStream(File file) throws FileNotFoundException {
            super(file);
            this.file = file;
        }

        @Override
        public void close() throws IOException {
            super.close();
            file.delete();
        }
    }

}
