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package org.apache.james.imap.processor;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.apache.james.imap.api.ImapCommand;
import org.apache.james.imap.api.ImapConstants;
import org.apache.james.imap.api.ImapSessionUtils;
import org.apache.james.imap.api.display.HumanReadableText;
import org.apache.james.imap.api.message.IdRange;
import org.apache.james.imap.api.message.response.StatusResponse.ResponseCode;
import org.apache.james.imap.api.message.response.StatusResponseFactory;
import org.apache.james.imap.api.process.ImapProcessor;
import org.apache.james.imap.api.process.ImapSession;
import org.apache.james.imap.api.process.SelectedMailbox;
import org.apache.james.imap.message.request.ExpungeRequest;
import org.apache.james.mailbox.MailboxManager;
import org.apache.james.mailbox.MailboxSession;
import org.apache.james.mailbox.MessageManager;
import org.apache.james.mailbox.MessageManager.MetaData;
import org.apache.james.mailbox.MessageManager.MetaData.FetchGroup;
import org.apache.james.mailbox.exception.MailboxException;
import org.apache.james.mailbox.exception.MessageRangeException;
import org.apache.james.mailbox.model.MessageRange;
public class ExpungeProcessor extends AbstractMailboxProcessor<ExpungeRequest> implements CapabilityImplementingProcessor {
private final static List<String> UIDPLUS = Collections.unmodifiableList(Arrays.asList("UIDPLUS"));
public ExpungeProcessor(final ImapProcessor next, final MailboxManager mailboxManager, final StatusResponseFactory factory) {
super(ExpungeRequest.class, next, mailboxManager, factory);
}
protected void doProcess(ExpungeRequest request, ImapSession session, String tag, ImapCommand command, Responder responder) {
try {
final MessageManager mailbox = getSelectedMailbox(session);
final MailboxSession mailboxSession = ImapSessionUtils.getMailboxSession(session);
int expunged = 0;
MetaData mdata = mailbox.getMetaData(false, mailboxSession, FetchGroup.NO_COUNT);
if (!mdata.isWriteable()) {
no(command, tag, responder, HumanReadableText.MAILBOX_IS_READ_ONLY);
} else {
IdRange[] ranges = request.getUidSet();
if (ranges == null) {
expunged = expunge(mailbox, MessageRange.all(), session, mailboxSession);
} else {
// Handle UID EXPUNGE which is part of UIDPLUS
// See http://tools.ietf.org/html/rfc4315
for (int i = 0; i < ranges.length; i++) {
MessageRange mRange = messageRange(session.getSelected(), ranges[i], true);
if (mRange != null) {
expunged += expunge(mailbox, mRange, session, mailboxSession);
}
}
}
unsolicitedResponses(session, responder, false);
// Check if QRESYNC was enabled and at least one message was expunged. If so we need to respond with an OK response that contain the HIGHESTMODSEQ
//
// See RFC5162 3.3 EXPUNGE Command 3.5. UID EXPUNGE Command
if (EnableProcessor.getEnabledCapabilities(session).contains(ImapConstants.SUPPORTS_QRESYNC) && expunged > 0) {
okComplete(command, tag, ResponseCode.highestModSeq(mdata.getHighestModSeq()), responder);
} else {
okComplete(command, tag, responder);
}
}
} catch (MessageRangeException e) {
if (session.getLog().isDebugEnabled()) {
session.getLog().debug("Expunge failed", e);
}
taggedBad(command, tag, responder, HumanReadableText.INVALID_MESSAGESET);
} catch (MailboxException e) {
if (session.getLog().isInfoEnabled()) {
session.getLog().info("Expunge failed for mailbox " + session.getSelected().getPath(), e);
}
no(command, tag, responder, HumanReadableText.GENERIC_FAILURE_DURING_PROCESSING);
}
}
private int expunge(MessageManager mailbox, MessageRange range, ImapSession session, MailboxSession mailboxSession) throws MailboxException {
final Iterator<Long> it = mailbox.expunge(range, mailboxSession);
final SelectedMailbox selected = session.getSelected();
int expunged = 0;
if (mailboxSession != null) {
while (it.hasNext()) {
final long uid = it.next();
selected.removeRecent(uid);
expunged++;
}
}
return expunged;
}
/**
* @see org.apache.james.imap.processor.CapabilityImplementingProcessor
* #getImplementedCapabilities(org.apache.james.imap.api.process.ImapSession)
*/
public List<String> getImplementedCapabilities(ImapSession session) {
return UIDPLUS;
}
}