org.obm.push.mail.EmailSync.java Source code

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Here is the source code for org.obm.push.mail.EmailSync.java

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: GPL 2.0
 *
 * The contents of this file are subject to the GNU General Public
 * License Version 2 or later (the "GPL").
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Initial Developer of the Original Code is
 *   MiniG.org project members
 *
 * ***** END LICENSE BLOCK ***** */

package org.obm.push.mail;

import java.util.Collection;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import org.minig.imap.FastFetch;
import org.minig.imap.SearchQuery;
import org.minig.imap.StoreClient;
import org.obm.push.bean.Email;
import org.obm.push.bean.SyncState;
import org.obm.push.exception.DaoException;
import org.obm.push.store.EmailDao;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Sets;
import com.google.inject.Inject;
import com.google.inject.Singleton;

@Singleton
public class EmailSync implements IEmailSync {

    private final static Logger logger = LoggerFactory.getLogger(EmailSync.class);
    private final EmailDao emailDao;

    @Inject
    public EmailSync(EmailDao emailDao) {
        this.emailDao = emailDao;
    }

    @Override
    public MailChanges getSync(StoreClient imapStore, Integer devId, SyncState state, Integer collectionId)
            throws DaoException {
        Set<Email> emailsFromIMAP = getImapEmails(imapStore, state.getLastSync());
        Set<Email> alreadySyncedEmails = emailDao.alreadySyncedEmails(collectionId, devId, emailsFromIMAP);
        Set<Email> emailsToSync = Sets.difference(emailsFromIMAP, alreadySyncedEmails);
        MailChanges mailChanges = new MailChanges(new HashSet<Email>(), emailsToSync, emailsFromIMAP);
        loggerInfo(state.getLastSync(), emailsFromIMAP, mailChanges);
        return mailChanges;
    }

    private void loggerInfo(Date syncStartDate, Set<Email> emailsFromIMAP, MailChanges mailChanges) {
        logger.info("Synchronization date {}", syncStartDate);
        logger.info("{} email(s) from imap", emailsFromIMAP.size());
        logger.info("{} email(s) will be updated to pda", mailChanges.getUpdatedEmailFromImap().size());
        logger.info("{} email(s) will be updated to db", mailChanges.getUpdatedEmailToDB().size());
    }

    private Set<Email> getImapEmails(StoreClient imapStore, Date windows) {
        Collection<Long> uids = imapStore.uidSearch(new SearchQuery(null, windows));
        Collection<FastFetch> mails = imapStore.uidFetchFast(uids);
        return EmailFactory.listEmailFromFastFetch(mails);
    }

}