org.apache.james.jmap.send.MailFactory Maven / Gradle / Ivy

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package org.apache.james.jmap.send;

import java.io.IOException;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import javax.mail.MessagingException;
import javax.mail.internet.AddressException;

import org.apache.james.core.MailImpl;
import org.apache.james.jmap.model.Emailer;
import org.apache.james.jmap.model.Message;
import org.apache.james.jmap.model.MessageFactory.MetaDataWithContent;
import org.apache.mailet.Mail;
import org.apache.mailet.MailAddress;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;

public class MailFactory {
    private static final Logger LOGGER = LoggerFactory.getLogger(MailFactory.class);
    
    @VisibleForTesting MailFactory() {
    }

    public Mail build(MetaDataWithContent message, Message jmapMessage) throws MessagingException, IOException {
        MailAddress sender = jmapMessage.getFrom()
                .map(this::emailerToMailAddress)
                .orElseThrow(() -> new RuntimeException("Sender is mandatory"));
        Set to = emailersToMailAddressSet(jmapMessage.getTo());
        Set cc = emailersToMailAddressSet(jmapMessage.getCc());
        Set bcc = emailersToMailAddressSet(jmapMessage.getBcc());
        ImmutableSet recipients = Sets.union(
                Sets.union(to, cc),
                bcc).immutableCopy();
        return new MailImpl(jmapMessage.getId().serialize(), sender, recipients, message.getContent());
    }

    private MailAddress emailerToMailAddress(Emailer emailer) {
        Preconditions.checkArgument(emailer.getEmail().isPresent(), "eMailer mail address should be present when sending a mail using JMAP");
        try {
            return new MailAddress(emailer.getEmail().get());
        } catch (AddressException e) {
            LOGGER.error("Invalid mail address", emailer.getEmail());
            throw Throwables.propagate(e);
        }
    }

    private Set emailersToMailAddressSet(List emailers) {
        return emailers.stream()
            .map(this::emailerToMailAddress)
            .collect(Collectors.toSet());
    }
}