datasquirel/package-shared/functions/backend/handleNodemailer.js

// @ts-check

/**
 * Imports
 * ==============================================================================
 */

const fs = require("fs");

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const nodemailer = require("nodemailer");

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let transporter = nodemailer.createTransport({
    host: process.env.DSQL_MAIL_HOST,
    port: 465,
    secure: true,
    auth: {
        user: process.env.DSQL_MAIL_EMAIL,
        pass: process.env.DSQL_MAIL_PASSWORD,
    },
});

/** ****************************************************************************** */
/** ****************************************************************************** */
/** ****************************************************************************** */
/** ****************************************************************************** */
/** ****************************************************************************** */
/** ****************************************************************************** */

/**
 * # Handle mails
 * @param {object} mailObject - Mail Object with params
 * @param {string} [mailObject.to] - who is recieving this email? Comma separated for multiple recipients
 * @param {string} [mailObject.subject] - Mail Subject
 * @param {string} [mailObject.text] - Mail text
 * @param {string} [mailObject.html] - Mail HTML
 * @param {string | null} [mailObject.alias] - Sender alias: "support" or null
 *
 * @returns {Promise<any>} mail object
 */
module.exports = async function handleNodemailer({
    to,
    subject,
    text,
    html,
    alias,
}) {
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    if (
        !process.env.DSQL_MAIL_HOST ||
        !process.env.DSQL_MAIL_EMAIL ||
        !process.env.DSQL_MAIL_PASSWORD
    ) {
        return null;
    }

    const sender = (() => {
        if (alias?.match(/support/i)) return process.env.DSQL_MAIL_EMAIL;
        return process.env.DSQL_MAIL_EMAIL;
    })();

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    let sentMessage;

    if (!fs.existsSync("./email/index.html")) {
        return;
    }

    let mailRoot = fs.readFileSync("./email/index.html", "utf8");
    let finalHtml = mailRoot
        .replace(/{{email_body}}/, html ? html : "")
        .replace(/{{issue_date}}/, Date().substring(0, 24));

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    try {
        let mailObject = {};

        mailObject["from"] = `"Datasquirel" <${sender}>`;
        mailObject["sender"] = sender;
        if (alias) mailObject["replyTo "] = sender;
        // mailObject["priority"] = "high";
        mailObject["to"] = to;
        mailObject["subject"] = subject;
        mailObject["text"] = text;
        mailObject["html"] = finalHtml;

        // send mail with defined transport object
        let info = await transporter.sendMail(mailObject);

        sentMessage = info;

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    } catch (/** @type {any} */ error) {
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        console.log("ERROR in handleNodemailer Function =>", error.message);
        // serverError({
        //     component: "handleNodemailer",
        //     message: error.message,
        //     user: { email: to },
        // });
    }

    return sentMessage;
};

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