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 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
 * with the License.  You may obtain a copy of the License at   *
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 * software distributed under the License is distributed on an  *
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
 * KIND, either express or implied.  See the License for the    *
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 * under the License.                                           *
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package org.apache.james.mailbox.store.mail;

import java.util.Collection;
import java.util.List;

import javax.mail.Flags;

import org.apache.james.mailbox.MessageManager;
import org.apache.james.mailbox.exception.MailboxException;
import org.apache.james.mailbox.exception.MailboxNotFoundException;
import org.apache.james.mailbox.model.ComposedMessageIdWithMetaData;
import org.apache.james.mailbox.model.Mailbox;
import org.apache.james.mailbox.model.MailboxId;
import org.apache.james.mailbox.model.MessageId;
import org.apache.james.mailbox.model.UpdatedFlags;
import org.apache.james.mailbox.store.mail.MessageMapper.FetchType;
import org.apache.james.mailbox.store.mail.model.MailboxMessage;
import org.reactivestreams.Publisher;

import com.github.fge.lambdas.Throwing;
import com.google.common.collect.Multimap;

import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Schedulers;

public interface MessageIdMapper {

    List<MailboxMessage> find(Collection<MessageId> messageIds, FetchType fetchType);

    Publisher<ComposedMessageIdWithMetaData> findMetadata(MessageId messageId);

    default Flux<MailboxMessage> findReactive(Collection<MessageId> messageIds, FetchType fetchType) {
        return Flux.fromIterable(find(messageIds, fetchType));
    }

    List<MailboxId> findMailboxes(MessageId messageId);

    void save(MailboxMessage mailboxMessage) throws MailboxNotFoundException, MailboxException;

    void copyInMailbox(MailboxMessage mailboxMessage, Mailbox mailbox) throws MailboxException;

    default Mono<Void> copyInMailboxReactive(MailboxMessage mailboxMessage, Mailbox mailbox) {
        return Mono.<Void>fromRunnable(Throwing.runnable(() -> copyInMailbox(mailboxMessage, mailbox)).sneakyThrow())
            .subscribeOn(Schedulers.elastic());
    }

    void delete(MessageId messageId);

    void delete(MessageId messageId, Collection<MailboxId> mailboxIds);

    default Mono<Void> deleteReactive(MessageId messageId, Collection<MailboxId> mailboxIds) {
        return Mono.fromRunnable(() -> delete(messageId, mailboxIds))
            .subscribeOn(Schedulers.elastic())
            .then();
    }

    default void delete(Multimap<MessageId, MailboxId> ids) {
        ids.asMap()
            .forEach(this::delete);
    }

    default Mono<Void> deleteReactive(Multimap<MessageId, MailboxId> ids) {
        return Mono.fromRunnable(() -> delete(ids))
            .subscribeOn(Schedulers.elastic())
            .then();
    }

    /**
     * Updates the flags of the messages with the given MessageId in the supplied mailboxes
     *
     * More one message can be updated when a message is contained several time in the same mailbox with distinct
     * MessageUid.
     *
     * @return Metadata of the update, indexed by mailboxIds.
     * @throws MailboxException
     */
    Mono<Multimap<MailboxId, UpdatedFlags>> setFlags(MessageId messageId, List<MailboxId> mailboxIds, Flags newState, MessageManager.FlagsUpdateMode updateMode);
}
