Mail Attachments in B2C Commerce Cloud

				
					'use strict';

var server = require('server');

/**
 * Encodes a string into a base64 string with an email-safe line width
 *
 * @param {string} str String the string to encode
 * @param {string} characterEncoding String the character encoding (i.e. 'ISO-8859-1')
 *
 * @return {string} The encoded string
 */
function encodeBase64ForEmail(str, characterEncoding) {
    var StringUtils = require('dw/util/StringUtils');
    var StringWriter = require('dw/io/StringWriter');
    var strBase64 = StringUtils.encodeBase64(str, characterEncoding);
    var strBase64LB = '';
    var stringWriter = new StringWriter();

    var offset = 0;
    var length = 76;

    while (offset < strBase64.length) {
        var maxOffset = offset + length;

        if (strBase64.length >= maxOffset) {
            stringWriter.write(strBase64, offset, length);
            stringWriter.write('\n');
        } else {
            stringWriter.write(strBase64, offset, length - (maxOffset - strBase64.length));
        }
        offset += length;
    }

    stringWriter.flush();
    strBase64LB = stringWriter.toString();
    stringWriter.close();

    return strBase64LB;
}

/**
 * Read a file to a String (encoded in IS0-8859-1)
 *
 * @param {string} filePath - The file path to read
 *
 * @return {string} - The file content
 */
function readPDFFile(filePath) {
    var File = require('dw/io/File');
    var FileReader = require('dw/io/FileReader');

    var testPDF = new File(filePath);
    var pdfReader = new FileReader(testPDF, 'ISO-8859-1');

    var pdfContent = '';
    var line = '';

    /**
     * Warning: You can reach the maximum string length with this code!
     */
    do {
        line = pdfReader.readN(1000);
        pdfContent += line;
    } while (line != null);

    return pdfContent;
}


/**
 * Add files to the attributes to render the mail template.
 *
 * @param {dw.util.Map} mailAttributes - The mail attributes
 */
function addFilesToMailAttributes(mailAttributes) {
    var Map = require('dw/util/HashMap');
    var pdfContent = readPDFFile('IMPEX/jspdf/test_0.pdf');
    var files = new Map();

    files.put('test.pdf', encodeBase64ForEmail(pdfContent, 'ISO-8859-1'));

    mailAttributes.put('Base64FileMap', files);
}

/**
 * Just an example controller to test sending a mail with attachments
 */
server.get('Test', function (req, res, next) {
    var Map = require('dw/util/HashMap');
    var Template = require('dw/util/Template');
    var Mail = require('dw/net/Mail');

    // Create the template that we will use to send the email.
    var template = new Template('mail/testMail.isml');

    // Work with a HashMap to pass the data to the template.
    var mailAttributes = new Map();
    mailAttributes.put('EmailMessage', 'Test Message');
    addFilesToMailAttributes(mailAttributes);

    var mail = new Mail();
    // Render the template with the data in the Hash
    var content = template.render(mailAttributes);

    mail.addTo('thomas.theunen@gmail.com');
    mail.setFrom('info@forward.eu');
    mail.setSubject('Example Email');
    mail.setContent(content);

    res.json({
        success: mail.send().message,
        content: content.getText()
    });

    next();
});

module.exports = server.exports();