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Simple SMTP sender for java applications
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/*
 * Copyright 2015 Agapsys Tecnologia Ltda-ME.
 *
 * Licensed 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
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, 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 specific language governing permissions and
 * limitations under the License.
 */

package com.agapsys.mail;

import java.util.Collections;
import java.util.Set;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/**
 * Represents an e-mail message.
 */
public class Message {
    private final InternetAddress senderAddress;
    private final Set recipients;

    private final String subject;
    private final String text;
    private final String charset;
    private final String mimeSubtype;

    Message(InternetAddress senderAddress, Set recipients, String subject, String text, String charset, String mimeSubtype) {
        this.senderAddress = senderAddress;
        this.recipients = Collections.unmodifiableSet(recipients);
        this.subject = subject;
        this.text = text;
        this.charset = charset;
        this.mimeSubtype = mimeSubtype;
    }

    public InternetAddress getSenderAddress() {
        return senderAddress;
    }

    public Set getRecipients() {
        return recipients;
    }

    public String getSubject() {
        return subject;
    }

    public String getText() {
        return text;
    }

    public String getCharset() {
        return charset;
    }

    public String getMimeSubtype() {
        return mimeSubtype;
    }

    public String getMime() {
        return "text/" + mimeSubtype;
    }

    MimeMessage getMimeMessage(Session session) throws MessagingException {
        MimeMessage mimeMessage = new MimeMessage(session);

        mimeMessage.setFrom(senderAddress);
        mimeMessage.setRecipients(javax.mail.Message.RecipientType.TO, recipients.toArray(new InternetAddress[recipients.size()]));
        mimeMessage.setSubject(subject);
        mimeMessage.setText(text, charset, mimeSubtype);

        return mimeMessage;
    }

    @Override
    public String toString() {
        return String.format(
            "Mime: %s\nCharset: %s\nSender: %s\nRecipients: %s\nSubject: %s\nMessage:\n\n%s",
            getMime(),
            getCharset(),
            getSenderAddress(),
            getRecipients(),
            getSubject(),
            getText()
        );
    }
}