Sending Newsletters with dynamic content

Goal: Send a Newsletter that is based on a Mailing Template but also contains content that is dynamically gathered and rendered with CSE.

You can download the whole Kickstarter-based sample application from our GitLab repository: um-public/tutorial-dynamic-newsletter-content

Start a new Kickstarter project

umkickstarter -n de.pinuts.tutorial
cd umkickstarter
gradle setup run

Create Newsletter Template

Login to http://localhost:8080/cmsbs as admin / admin and create a new Newsletter Template named offerlist-nl with the following HTML body:

Dear {firstname},

your top offers for today:

{withcse:renderOfferList:}

Implement RenderEntryCallback

Implement a new RenderEntryCall method that will be called by the withcse directive from within the Newsletter Template just created.

This method should return true to indicate that the string in this.value should be rendered into the newsletter body.

cmsbs-conf/cse/plugins/de.pinuts.tutorial/callback/RenderEntryCallback.es6:

/// <reference path="../../../.vscode.js"/>

import faker from "@de.pinuts.demodata/shared/faker.es6";

function renderOffers(offers) {
    return `<ul>${offers.map(renderOffer).join('')}</ul>`;
}

function renderOffer(offer) {
    return (
    `<li style="margin-bottom: 8px">
        <strong>${Strings.encodeXml(offer.productName)}</strong><br/>
        ${Strings.encodeXml(offer.price)}
    </li>`);
}

function fakeOffers() {
    const offers = [];
    const num = faker.random.number({min: 0, max: 5});

    for (let idx = 0; idx < num; idx++) {
        offers.push({
            productName: faker.commerce.productName(),
            price: faker.commerce.price(10, 100, 2, '€')
        });
    }

    return offers;
}

RenderEntryCallback.prototype.renderOfferList = function() {
    const offers = fakeOffers();
    this.templateContext.doSend = offers.length > 0;
    this.value = renderOffers(offers);
    return true;
}

Install DemoData plugin

To generate some random content we use the DemoData plugin. Include the dependency into your build.gradle file and run gradle setup run once more:

...
dependencies {
    runtime('de.pinuts.cmsbs:UM:7.34.1')
    runtime('de.pinuts.cmsbs:TestDriver2:2.0.6')
    runtime('de.pinuts.cmsbs:DemoData:1.0.4')
}
...

Send Newsletter manually

Now manually create a List named offerlist and some Entries with email addresses that are subscribed to that list.

Send a Newsletter manually based on the template created earlier.

Goto Tools / Mail Log to verify that emails have been sent and actually do contain the dynamically generated content.

Send Newsletter programmatically

If you also want to start sending the above Newsletter programmatically – i.e. by a Cronjob – you can create an EventFile and trigger sending with the following code snippet.

cmsbs-conf/cse/plugins/de.pinuts.tutorial/shared/SendOfferListNewsletter.es6:

/// <reference path="../../../.vscode.js"/>

const MAILING_TEMPLATE_NAME = 'offerlist-nl';
const CHANNEL_NAME = 'offerlist';
const NEWSLETTER_TAG = 'offerlist';

function createEventFile() {
    return `<event archive="true">
        <destination>
            <channel>${Strings.encodeXml(CHANNEL_NAME)}</channel>
        </destination>
        <data>
            <message>${Strings.encodeXml(MAILING_TEMPLATE_NAME)}</message>
            <email archiveOutgoingEmails="false" obeyPreferHtml="false" sendBothParts="false" trackingMode="Off"></email>
        </data>
        <tag>${Strings.encodeXml(NEWSLETTER_TAG)}</tag>
    </event>`;
}

export function run() {
    UM.println('Preparing newsletter...');

    const eventFile = createEventFile();
    UM.newsletterArchive.send(eventFile);
}

de.pinuts.tutorial.sendNewsletter = run;

Having done that you can create a CSE: Call Cronjob to periodically call de.pinuts.tutorial.sendNewsletter().