/**
 * MailArchiver is an application that provides services for storing and managing e-mail messages through a Web Services SOAP interface.
 * Copyright (C) 2012  Marcio Andre Scholl Levien and Fernando Alberto Reuter Wendt and Jose Ronaldo Nogueira Fonseca Junior
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

/******************************************************************************\
*
*  This product was developed by
*
*        SERVIÇO FEDERAL DE PROCESSAMENTO DE DADOS (SERPRO),
*
*  a government company established under Brazilian law (5.615/70),
*  at Department of Development of Porto Alegre.
*
\******************************************************************************/

package serpro.mailarchiver.service.web;

import java.io.IOException;
import java.util.regex.Pattern;

import javax.jdo.annotations.PersistenceAware;

import org.springframework.beans.factory.annotation.Autowired;

import serpro.mailarchiver.domain.metaarchive.Message;
import serpro.mailarchiver.domain.metaarchive.TextBody;
import serpro.mailarchiver.service.BaseService;
import serpro.mailarchiver.service.find.FMessage;
import serpro.mailarchiver.util.BodyVisitor;
import serpro.mailarchiver.util.Logger;
import serpro.mailarchiver.util.transaction.WithReadOnlyTx;

@PersistenceAware
public class DefaultGetMessageBodyOperation
    extends BaseService
    implements GetMessageBodyOperation
{
    private static final Logger log = Logger.getLocalLogger();

    @Autowired
    private FMessage findMessage;

    private static final Pattern controlCharactersPattern = Pattern.compile("[\\x00-\\x09\\x0B\\x0C\\x0E-\\x1F]");

    @WithReadOnlyTx
    @Override
    public String apply(String messageId) throws ServiceFault {

        if(messageId.isEmpty()) {
            ServiceFault.invalidMessageId()
                    .setActor("getMessageBody")
                    .setMessage("Message id is empty or null.")
                    .raise();
        }

        Message message = findMessage.byId(messageId);

        if(message == null) {
            ServiceFault.messageNotFound()
                    .setActor("getMessageBody")
                    .setMessage("Message not found.")
                    .addValue("messageId", messageId)
                    .raise();
        }

        final StringBuilder sb = new StringBuilder();

        sb.append("<span>\n");

        message.visitBodies(new BodyVisitor() {
            @Override
            public void visitTextBody(TextBody textBody) {
                try {
                    sb.append(
                            "    <div id='text-body-").append(textBody.getOid()).append("'>\n")
                                    .append(textBody.getAdaptedText()).append("\n"
                        +   "    </div>\n");
                }
                catch(IOException ex) {
                    log.error(ex);
                }
            }
        });

        sb.append("</span>\n");

        return controlCharactersPattern.matcher(sb.toString()).replaceAll("");
    }
}