EmailService.java

/*
 * =============================================================================
 *
 *   Copyright (c) 2011-2014, The THYMELEAF team (http://www.thymeleaf.org)
 *
 *   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.neblina.balero.service;

import com.neblina.balero.domain.Property;
import com.neblina.balero.service.repository.PropertyRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.ByteArrayResource;
import org.springframework.core.io.InputStreamSource;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
import java.util.Base64;
import java.util.Date;
import java.util.Locale;

@Service
public class EmailService {

    @Autowired
    private JavaMailSender mailSender;

    @Autowired
    private TemplateEngine templateEngine;

    @Autowired
    private PropertyRepository propertyRepository;

    /*
     * Send HTML mail (simple)
     */
    public void sendSimpleMail(

            final String recipientName, final String recipientEmail, final String subject, final String messageBody, final Locale locale)
            throws MessagingException, UnsupportedEncodingException {

        // Prepare the evaluation context
        final Context ctx = new Context(locale);
        ctx.setVariable("name", recipientName);
        ctx.setVariable("subscriptionDate", new Date());
        ctx.setVariable("hobbies", Arrays.asList("Cinema", "Sports", "Music"));
        ctx.setVariable("message", messageBody);

        // Unsubscribe Link
        Base64.Encoder encoder = Base64.getEncoder();
        String base64email = encoder.encodeToString(recipientEmail.getBytes("utf-8"));
        Property property = propertyRepository.findOneById(1L);
        String fullLink = property.getUrl() + "user/subscribe?unsubscribe=" + base64email;
        ctx.setVariable("unsubscribe", fullLink);

        // Prepare message using a Spring helper
        final MimeMessage mimeMessage = this.mailSender.createMimeMessage();
        final MimeMessageHelper message = new MimeMessageHelper(mimeMessage, "UTF-8");
        message.setSubject(subject);
        message.setFrom("thymeleaf@example.com");
        message.setTo(recipientEmail);

        // Create the HTML body using Thymeleaf
        final String htmlContent = this.templateEngine.process("email-simple.html", ctx);
        message.setText(htmlContent, true /* isHtml */);

        // Send email
        this.mailSender.send(mimeMessage);

    }

    /*
     * Send HTML mail with attachment.
     */
    public void sendMailWithAttachment(
            final String recipientName, final String recipientEmail, final String attachmentFileName,
            final byte[] attachmentBytes, final String attachmentContentType, final Locale locale)
            throws MessagingException {

        // Prepare the evaluation context
        final Context ctx = new Context(locale);
        ctx.setVariable("name", recipientName);
        ctx.setVariable("subscriptionDate", new Date());
        ctx.setVariable("hobbies", Arrays.asList("Cinema", "Sports", "Music"));

        // Prepare message using a Spring helper
        final MimeMessage mimeMessage = this.mailSender.createMimeMessage();
        final MimeMessageHelper message =
                new MimeMessageHelper(mimeMessage, true /* multipart */, "UTF-8");
        message.setSubject("Example HTML email with attachment");
        message.setFrom("thymeleaf@example.com");
        message.setTo(recipientEmail);

        // Create the HTML body using Thymeleaf
        final String htmlContent = this.templateEngine.process("email-withattachment.html", ctx);
        message.setText(htmlContent, true /* isHtml */);

        // Add the attachment
        final InputStreamSource attachmentSource = new ByteArrayResource(attachmentBytes);
        message.addAttachment(
                attachmentFileName, attachmentSource, attachmentContentType);

        // Send mail
        this.mailSender.send(mimeMessage);

    }

    /*
     * Send HTML mail with inline image
     */
    public void sendMailWithInline(
            final String recipientName, final String recipientEmail, final String imageResourceName,
            final byte[] imageBytes, final String imageContentType, final Locale locale)
            throws MessagingException {

        // Prepare the evaluation context
        final Context ctx = new Context(locale);
        ctx.setVariable("name", recipientName);
        ctx.setVariable("subscriptionDate", new Date());
        ctx.setVariable("hobbies", Arrays.asList("Cinema", "Sports", "Music"));
        ctx.setVariable("imageResourceName", imageResourceName); // so that we can reference it from HTML

        // Prepare message using a Spring helper
        final MimeMessage mimeMessage = this.mailSender.createMimeMessage();
        final MimeMessageHelper message =
                new MimeMessageHelper(mimeMessage, true /* multipart */, "UTF-8");
        message.setSubject("Example HTML email with inline image");
        message.setFrom("thymeleaf@example.com");
        message.setTo(recipientEmail);

        // Create the HTML body using Thymeleaf
        final String htmlContent = this.templateEngine.process("email-inlineimage.html", ctx);
        message.setText(htmlContent, true /* isHtml */);

        // Add the inline image, referenced from the HTML code as "cid:${imageResourceName}"
        final InputStreamSource imageSource = new ByteArrayResource(imageBytes);
        message.addInline(imageResourceName, imageSource, imageContentType);

        // Send mail
        this.mailSender.send(mimeMessage);

    }

}