@bitblit/ratchet-common/lib/mail/mailer-util.js

Common tools for general use

import { RequireRatchet } from '../lang/require-ratchet.js';
import { StringRatchet } from '../lang/string-ratchet.js';
export class MailerUtil {
    static EMAIL = new RegExp('.+@.+\\.[a-z]+');
    constructor() { }
    static convertResolvedReadyToSendEmailToRaw(rts) {
        RequireRatchet.notNullOrUndefined(rts, 'RTS must be defined');
        RequireRatchet.notNullOrUndefined(rts.destinationAddresses, 'Destination addresses must be defined');
        const toLine = 'To: ' + rts.destinationAddresses.join(', ') + '\n';
        const bccLine = !!rts.bccAddresses && rts.bccAddresses.length > 0 ? 'Bcc: ' + rts.bccAddresses.join(', ') + '\n' : '';
        const from = rts.fromAddress;
        const boundary = 'NextPart';
        const altBoundary = 'AltPart';
        let rawMail = 'From: ' + from + '\n';
        rawMail += toLine;
        rawMail += bccLine;
        rawMail += 'Subject: ' + rts.subject + '\n';
        rawMail += 'MIME-Version: 1.0\n';
        rawMail += 'Content-Type: multipart/mixed; boundary="' + boundary + '"\n';
        rawMail += '\n\n--' + boundary + '\n';
        rawMail += 'Content-Type: multipart/alternative; boundary="' + altBoundary + '"\n';
        if (StringRatchet.trimToNull(rts.htmlMessage)) {
            rawMail += '\n\n--' + altBoundary + '\n';
            rawMail += 'Content-Type: text/html; charset="UTF-8"\n\n';
            rawMail += rts.htmlMessage;
        }
        if (StringRatchet.trimToNull(rts.txtMessage)) {
            rawMail += '\n\n--' + altBoundary + '\n';
            rawMail += 'Content-Type: text/plain\n\n';
            rawMail += rts.txtMessage;
        }
        rawMail += '\n\n--' + altBoundary + '--\n';
        if (rts.attachments) {
            rts.attachments.forEach((a) => {
                rawMail += '\n\n--' + boundary + '\n';
                rawMail += 'Content-Type: ' + a.contentType + '; name="' + a.filename + '"\n';
                rawMail += 'Content-Transfer-Encoding: base64\n';
                rawMail += 'Content-Disposition: attachment\n\n';
                rawMail += a.base64Data.replace(/([^\0]{76})/g, '$1\n') + '\n\n';
            });
        }
        rawMail += '\n\n--' + boundary + '--\n';
        return rawMail;
    }
    static validEmail(email) {
        return email !== null && MailerUtil.EMAIL.test(email);
    }
}
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