mirror of
https://github.com/TryGhost/Ghost.git
synced 2024-12-19 08:31:43 +03:00
42f9d392a3
closes https://github.com/TryGhost/Team/issues/2309 - adds new mailgun provider to send out batch emails - updates sending service to send email id for mailgun provider, allows tagging mail with email id
653 lines
23 KiB
JavaScript
653 lines
23 KiB
JavaScript
/* eslint-disable no-unused-vars */
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const logging = require('@tryghost/logging');
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const fs = require('fs').promises;
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const path = require('path');
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const {isUnsplashImage, isLocalContentImage} = require('@tryghost/kg-default-cards/lib/utils');
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const {Color, textColorForBackgroundColor, darkenToContrastThreshold} = require('@tryghost/color-utils');
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const {DateTime} = require('luxon');
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const htmlToPlaintext = require('@tryghost/html-to-plaintext');
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/**
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* @typedef {string|null} Segment
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* @typedef {object} Post
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* @typedef {object} Newsletter
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*/
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/**
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* @typedef {object} MemberLike
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* @prop {string} id
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* @prop {string} uuid
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* @prop {string} email
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* @prop {string} name
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*/
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/**
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* @typedef {object} ReplacementDefinition
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* @prop {string} id
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* @prop {RegExp} token
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* @prop {(member: MemberLike) => string} getValue
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*/
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/**
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* @typedef {object} EmailRenderOptions
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* @prop {boolean} clickTrackingEnabled
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*/
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/**
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* @typedef {object} EmailBody
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* @prop {string} html
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* @prop {string} plaintext
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* @prop {ReplacementDefinition[]} replacements
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*/
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class EmailRenderer {
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#settingsCache;
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#settingsHelpers;
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#renderers;
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#imageSize;
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#urlUtils;
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#getPostUrl;
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#handlebars;
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#renderTemplate;
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#linkReplacer;
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#linkTracking;
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#memberAttributionService;
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#audienceFeedbackService;
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/**
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* @param {object} dependencies
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* @param {object} dependencies.settingsCache
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* @param {{getNoReplyAddress(): string, getMembersSupportAddress(): string}} dependencies.settingsHelpers
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* @param {object} dependencies.renderers
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* @param {{render(object, options): string}} dependencies.renderers.lexical
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* @param {{render(object, options): string}} dependencies.renderers.mobiledoc
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* @param {{getImageSizeFromUrl(url: string): Promise<{width: number}>}} dependencies.imageSize
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* @param {{urlFor(type: string, optionsOrAbsolute, absolute): string, isSiteUrl(url, context): boolean}} dependencies.urlUtils
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* @param {(post: Post) => string} dependencies.getPostUrl
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* @param {object} dependencies.linkReplacer
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* @param {object} dependencies.linkTracking
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* @param {object} dependencies.memberAttributionService
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* @param {object} dependencies.audienceFeedbackService
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*/
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constructor({
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settingsCache,
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settingsHelpers,
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renderers,
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imageSize,
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urlUtils,
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getPostUrl,
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linkReplacer,
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linkTracking,
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memberAttributionService,
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audienceFeedbackService
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}) {
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this.#settingsCache = settingsCache;
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this.#settingsHelpers = settingsHelpers;
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this.#renderers = renderers;
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this.#imageSize = imageSize;
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this.#urlUtils = urlUtils;
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this.#getPostUrl = getPostUrl;
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this.#linkReplacer = linkReplacer;
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this.#linkTracking = linkTracking;
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this.#memberAttributionService = memberAttributionService;
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this.#audienceFeedbackService = audienceFeedbackService;
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}
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getSubject(post) {
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return post.related('posts_meta')?.get('email_subject') || post.get('title');
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}
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getFromAddress(_post, newsletter) {
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let senderName = this.#settingsCache.get('title') ? this.#settingsCache.get('title').replace(/"/g, '\\"') : '';
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if (newsletter.get('sender_name')) {
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senderName = newsletter.get('sender_name');
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}
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let fromAddress = this.#settingsHelpers.getNoReplyAddress();
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if (newsletter.get('sender_email')) {
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fromAddress = newsletter.get('sender_email');
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}
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// For local development, rewrite the fromAddress to a proper domain
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if (process.env.NODE_ENV !== 'production') {
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if (/@localhost$/.test(fromAddress) || /@ghost.local$/.test(fromAddress)) {
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const localAddress = 'localhost@example.com';
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logging.warn(`Rewriting bulk email from address ${fromAddress} to ${localAddress}`);
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fromAddress = localAddress;
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}
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}
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return senderName ? `"${senderName}" <${fromAddress}>` : fromAddress;
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}
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/**
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* @param {Post} post
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* @param {Newsletter} newsletter
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* @returns {string|null}
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*/
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getReplyToAddress(post, newsletter) {
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if (newsletter.get('sender_reply_to') === 'support') {
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return this.#settingsHelpers.getMembersSupportAddress();
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}
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return this.getFromAddress(post, newsletter);
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}
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/**
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Not sure about this, but we need a method that can tell us which member segments are needed for a given post/email.
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@param {Post} post
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@returns {Segment[]}
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*/
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getSegments(post) {
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const allowedSegments = ['status:free', 'status:-free'];
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const html = this.renderPostBaseHtml(post);
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const cheerio = require('cheerio');
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const $ = cheerio.load(html);
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let allSegments = $('[data-gh-segment]')
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.get()
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.map(el => el.attribs['data-gh-segment']);
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/**
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* Always add free and paid segments if email has paywall card
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*/
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if (html.indexOf('<!--members-only-->') !== -1) {
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allSegments = allSegments.concat(['status:free', 'status:-free']);
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}
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const segments = [...new Set(allSegments)].filter(segment => allowedSegments.includes(segment));
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if (segments.length === 0) {
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// One segment to all members
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return [null];
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}
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return segments;
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}
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renderPostBaseHtml(post) {
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let html;
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if (post.get('lexical')) {
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html = this.#renderers.lexical.render(
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post.get('lexical'), {target: 'email', postUrl: post.url}
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);
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} else {
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html = this.#renderers.mobiledoc.render(
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JSON.parse(post.get('mobiledoc')), {target: 'email', postUrl: post.url}
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);
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}
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return html;
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}
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/**
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*
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* @param {Post} post
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* @param {Newsletter} newsletter
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* @param {Segment} segment
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* @param {EmailRenderOptions} options
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* @returns {Promise<EmailBody>}
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*/
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async renderBody(post, newsletter, segment, options) {
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let html = this.renderPostBaseHtml(post);
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// Paywall and members only content handling
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const isPaidPost = post.get('visibility') === 'paid' || post.get('visibility') === 'tiers';
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const membersOnlyIndex = html.indexOf('<!--members-only-->');
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const hasMembersOnlyContent = membersOnlyIndex !== -1;
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let addPaywall = false;
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if (isPaidPost && hasMembersOnlyContent) {
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if (segment === 'status:free') {
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// Add paywall
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addPaywall = true;
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// Remove the members-only content
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html = html.slice(0, membersOnlyIndex);
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}
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}
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const templateData = await this.getTemplateData({
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post,
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newsletter,
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html,
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addPaywall
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});
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html = await this.renderTemplate(templateData);
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// Link tracking
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if (options.clickTrackingEnabled) {
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html = await this.#linkReplacer.replace(html, async (url) => {
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// We ignore all links that contain %%{uuid}%%
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// because otherwise we would add tracking to links that need to be replaced first
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if (url.toString().indexOf('%%{uuid}%%') !== -1) {
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return url.toString();
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}
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// Add newsletter source attribution
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const isSite = this.#urlUtils.isSiteUrl(url);
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if (isSite) {
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// Add newsletter name as ref to the URL
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url = this.#memberAttributionService.addEmailSourceAttributionTracking(url, newsletter);
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// Only add post attribution to our own site (because external sites could/should not process this information)
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url = this.#memberAttributionService.addPostAttributionTracking(url, post);
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} else {
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// Add email source attribution without the newsletter name
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url = this.#memberAttributionService.addEmailSourceAttributionTracking(url);
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}
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// Add link click tracking
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url = await this.#linkTracking.service.addTrackingToUrl(url, post, '--uuid--');
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// We need to convert to a string at this point, because we need invalid string characters in the URL
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const str = url.toString().replace(/--uuid--/g, '%%{uuid}%%');
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return str;
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});
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}
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// Juice HTML (inline CSS)
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const juice = require('juice');
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html = juice(html, {inlinePseudoElements: true});
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// happens after inlining of CSS so we can change element types without worrying about styling
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const cheerio = require('cheerio');
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const $ = cheerio.load(html);
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// force all links to open in new tab
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$('a').attr('target', '_blank');
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// convert figure and figcaption to div so that Outlook applies margins
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$('figure, figcaption').each((i, elem) => !!(elem.tagName = 'div'));
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// Remove/hide parts of the email based on segment data attributes
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$('[data-gh-segment]').get().forEach((node) => {
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// TODO: replace with NQL interpretation
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if (node.attribs['data-gh-segment'] !== segment) {
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$(node).remove();
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} else {
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// Getting rid of the attribute for a cleaner html output
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$(node).removeAttr('data-gh-segment');
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}
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});
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// Convert DOM back to HTML
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html = $.html(); // () Fix for vscode syntax highlighter
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// Replacement strings
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const replacementDefinitions = this.buildReplacementDefinitions({html, newsletter});
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// TODO: normalizeReplacementStrings (replace unsupported replacement strings)
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// Convert HTML to plaintext
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const plaintext = htmlToPlaintext.email(html);
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// Fix any unsupported chars in Outlook
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html = html.replace(/'/g, ''');
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html = html.replace(/→/g, '→');
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html = html.replace(/–/g, '–');
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html = html.replace(/“/g, '“');
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html = html.replace(/”/g, '”');
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return {
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html,
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plaintext,
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replacements: replacementDefinitions
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};
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}
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/**
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* @private
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* createUnsubscribeUrl
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*
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* Takes a member and newsletter uuid. Returns the url that should be used to unsubscribe
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* In case of no member uuid, generates the preview unsubscribe url - `?preview=1`
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*
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* @param {string} uuid post uuid
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* @param {Object} [options]
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* @param {string} [options.newsletterUuid] newsletter uuid
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* @param {boolean} [options.comments] Unsubscribe from comment emails
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*/
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createUnsubscribeUrl(uuid, options = {}) {
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const siteUrl = this.#urlUtils.urlFor('home', true);
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const unsubscribeUrl = new URL(siteUrl);
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unsubscribeUrl.pathname = `${unsubscribeUrl.pathname}/unsubscribe/`.replace('//', '/');
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if (uuid) {
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unsubscribeUrl.searchParams.set('uuid', uuid);
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} else {
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unsubscribeUrl.searchParams.set('preview', '1');
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}
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if (options.newsletterUuid) {
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unsubscribeUrl.searchParams.set('newsletter', options.newsletterUuid);
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}
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if (options.comments) {
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unsubscribeUrl.searchParams.set('comments', '1');
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}
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return unsubscribeUrl.href;
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}
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/**
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* @private
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* Note that we only look in HTML because plaintext and HTML are essentially the same content
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* @returns {ReplacementDefinition[]}
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*/
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buildReplacementDefinitions({html, newsletter}) {
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const baseDefinitions = [
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{
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id: 'unsubscribe_url',
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getValue: (member) => {
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return this.createUnsubscribeUrl(member.uuid, {newsletterUuid: newsletter.get('uuid')});
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}
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},
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{
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id: 'uuid',
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getValue: (member) => {
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return member.uuid;
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}
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},
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{
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id: 'first_name',
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getValue: (member) => {
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return member.name?.split(' ')[0];
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}
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}
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];
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// Now loop through all the definenitions to see which ones are actually used + to add fallbacks if needed
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const EMAIL_REPLACEMENT_REGEX = /%%\{(.*?)\}%%/g;
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const REPLACEMENT_STRING_REGEX = /^(?<recipientProperty>\w+?)(?:,? *(?:"|")(?<fallback>.*?)(?:"|"))?$/;
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function escapeRegExp(string) {
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return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
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}
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// Stores the definitions that we are actually going to use
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const replacements = [];
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let result;
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while ((result = EMAIL_REPLACEMENT_REGEX.exec(html)) !== null) {
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const [replacementMatch, replacementStr] = result;
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// Did we already found this match and added it to the replacements array?
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if (replacements.find(r => r.id === replacementStr)) {
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continue;
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}
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const match = replacementStr.match(REPLACEMENT_STRING_REGEX);
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if (match) {
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const {recipientProperty, fallback} = match.groups;
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const definition = baseDefinitions.find(d => d.id === recipientProperty);
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if (definition) {
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replacements.push({
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id: replacementStr,
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token: new RegExp(escapeRegExp(replacementMatch), 'g'),
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getValue: fallback ? (member => definition.getValue(member) || fallback) : definition.getValue
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});
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}
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}
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}
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return replacements;
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}
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async renderTemplate(data) {
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if (this.#renderTemplate) {
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return this.#renderTemplate(data);
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}
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this.#handlebars = require('handlebars');
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// Helpers
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this.#handlebars.registerHelper('if', function (conditional, options) {
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if (conditional) {
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return options.fn(this);
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} else {
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return options.inverse(this);
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}
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});
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this.#handlebars.registerHelper('and', function () {
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const len = arguments.length - 1;
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for (let i = 0; i < len; i++) {
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if (!arguments[i]) {
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return false;
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}
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}
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return true;
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});
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this.#handlebars.registerHelper('not', function () {
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const len = arguments.length - 1;
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for (let i = 0; i < len; i++) {
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if (!arguments[i]) {
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return true;
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}
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}
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return false;
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});
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this.#handlebars.registerHelper('or', function () {
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const len = arguments.length - 1;
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for (let i = 0; i < len; i++) {
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if (arguments[i]) {
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return true;
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}
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}
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return false;
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});
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// Partials
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const cssPartialSource = await fs.readFile(path.join(__dirname, './email-templates/partials/', `styles.hbs`), 'utf8');
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this.#handlebars.registerPartial('styles', cssPartialSource);
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const paywallPartial = await fs.readFile(path.join(__dirname, './email-templates/partials/', `paywall.hbs`), 'utf8');
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this.#handlebars.registerPartial('paywall', paywallPartial);
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const feedbackButtonPartial = await fs.readFile(path.join(__dirname, './email-templates/partials/', `feedback-button.hbs`), 'utf8');
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this.#handlebars.registerPartial('feedbackButton', feedbackButtonPartial);
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// Actual template
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const htmlTemplateSource = await fs.readFile(path.join(__dirname, './email-templates/', `template.hbs`), 'utf8');
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this.#renderTemplate = this.#handlebars.compile(Buffer.from(htmlTemplateSource).toString());
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return this.#renderTemplate(data);
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}
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/**
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* @private
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*/
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async getTemplateData({post, newsletter, html, addPaywall}) {
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const accentColor = this.#settingsCache.get('accent_color') || '#15212A';
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const adjustedAccentColor = accentColor && darkenToContrastThreshold(accentColor, '#ffffff', 2).hex();
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const adjustedAccentContrastColor = accentColor && textColorForBackgroundColor(adjustedAccentColor).hex();
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const color = new Color(accentColor);
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const buttonBackgroundColor = `${accentColor}10`;
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const buttonTextColor = color.darken(0.6).hex();
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const {href: headerImage, width: headerImageWidth} = await this.limitImageWidth(newsletter.get('header_image'));
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const {href: postFeatureImage, width: postFeatureImageWidth} = await this.limitImageWidth(post.get('feature_image'));
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const timezone = this.#settingsCache.get('timezone');
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const publishedAt = (post.get('published_at') ? DateTime.fromJSDate(post.get('published_at')) : DateTime.local()).setZone(timezone).toLocaleString({
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year: 'numeric',
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month: 'short',
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day: 'numeric'
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});
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let authors;
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const postAuthors = await post.getLazyRelation('authors');
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if (postAuthors.models) {
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if (postAuthors.models.length <= 2) {
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authors = postAuthors.models.map(author => author.get('name')).join(' & ');
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} else {
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authors = `${postAuthors.models[0].name} & ${postAuthors.models.length - 1} others`;
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}
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}
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const postUrl = this.#getPostUrl(post);
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// Signup URL is the post url with a hash added to it
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const signupUrl = new URL(postUrl);
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signupUrl.hash = `/portal/signup`;
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// Audience feedback
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const positiveLink = this.#audienceFeedbackService.buildLink(
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'--uuid--',
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post.id,
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1
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).href.replace('--uuid--', '%%{uuid}%%');
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const negativeLink = this.#audienceFeedbackService.buildLink(
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'--uuid--',
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post.id,
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0
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).href.replace('--uuid--', '%%{uuid}%%');
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const data = {
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site: {
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title: this.#settingsCache.get('title'),
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url: this.#urlUtils.urlFor('home', true),
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iconUrl: this.#settingsCache.get('icon') ?
|
||
this.#urlUtils.urlFor('image', {
|
||
image: this.#settingsCache.get('icon')
|
||
}, true) : null
|
||
},
|
||
preheader: post.get('excerpt') ? post.get('excerpt') : `${post.get('title')} – `,
|
||
html,
|
||
|
||
post: {
|
||
title: post.get('title'),
|
||
url: postUrl,
|
||
authors,
|
||
publishedAt,
|
||
feature_image: postFeatureImage,
|
||
feature_image_width: postFeatureImageWidth,
|
||
feature_image_alt: post.related('posts_meta')?.get('feature_image_alt'),
|
||
feature_image_caption: post.related('posts_meta')?.get('feature_image_caption')
|
||
},
|
||
|
||
newsletter: {
|
||
name: newsletter.get('name')
|
||
},
|
||
|
||
//CSS
|
||
accentColor: accentColor, // default to #15212A
|
||
adjustedAccentColor: adjustedAccentColor || '#3498db', // default to #3498db
|
||
adjustedAccentContrastColor: adjustedAccentContrastColor || '#ffffff', // default to #ffffff
|
||
showBadge: newsletter.get('show_badge'),
|
||
|
||
headerImage,
|
||
headerImageWidth,
|
||
showHeaderIcon: newsletter.get('show_header_icon') && this.#settingsCache.get('icon'),
|
||
showHeaderTitle: newsletter.get('show_header_title'),
|
||
showHeaderName: newsletter.get('show_header_name'),
|
||
showFeatureImage: newsletter.get('show_feature_image') && postFeatureImage,
|
||
footerContent: newsletter.get('footer_content'),
|
||
|
||
classes: {
|
||
title: 'post-title' + (newsletter.get('title_font_category') === 'serif' ? ` post-title-serif` : ``) + (newsletter.get('title_alignment') === 'left' ? ` post-title-left` : ``),
|
||
titleLink: 'post-title-link' + (newsletter.get('title_alignment') === 'left' ? ` post-title-link-left` : ``),
|
||
meta: 'post-meta' + (newsletter.get('title_alignment') === 'left' ? ` post-meta-left` : ``),
|
||
body: newsletter.get('body_font_category') === 'sans_serif' ? `post-content-sans-serif` : `post-content`
|
||
},
|
||
|
||
// Audience feedback
|
||
feedbackButtons: newsletter.get('feedback_enabled') ? {
|
||
likeHref: positiveLink,
|
||
dislikeHref: negativeLink,
|
||
backgroundColor: buttonBackgroundColor,
|
||
textColor: buttonTextColor,
|
||
|
||
sizes: {
|
||
width: 100,
|
||
height: 38,
|
||
iconWidth: 24
|
||
},
|
||
// Sizes defined in pixels won’t be adjusted when Outlook is rendering at 120 dpi.
|
||
// To solve the problem we use values in points (1 pixel = 0.75 point).
|
||
// resource: https://www.hteumeuleu.com/2021/background-properties-in-vml/
|
||
sizesOutlook: {
|
||
width: (100 + 24) * 0.75,
|
||
height: 38 * 0.75 + 1,
|
||
iconWidth: 24 * 0.75
|
||
}
|
||
} : null,
|
||
|
||
// Paywall
|
||
paywall: addPaywall ? {
|
||
signupUrl: signupUrl.href
|
||
} : null,
|
||
|
||
year: new Date().getFullYear().toString()
|
||
};
|
||
|
||
return data;
|
||
}
|
||
|
||
/**
|
||
* @private
|
||
* Sets and limits the width of an image + returns the width
|
||
* @returns {Promise<{href: string, width: number}>}
|
||
*/
|
||
async limitImageWidth(href) {
|
||
if (!href) {
|
||
return {
|
||
href,
|
||
width: 0
|
||
};
|
||
}
|
||
if (isUnsplashImage(href)) {
|
||
// Unsplash images have a minimum size so assuming 1200px is safe
|
||
const unsplashUrl = new URL(href);
|
||
unsplashUrl.searchParams.set('w', '1200');
|
||
|
||
return {
|
||
href: unsplashUrl.href,
|
||
width: 600
|
||
};
|
||
} else {
|
||
try {
|
||
const size = await this.#imageSize.getImageSizeFromUrl(href);
|
||
|
||
if (size.width >= 600) {
|
||
// keep original image, just set a fixed width
|
||
size.width = 600;
|
||
}
|
||
|
||
// WARNING:
|
||
// TODO: this whole `isLocalContentImage` can never ever work (always false), this is old code that needs a rewrite!
|
||
if (isLocalContentImage(href, this.#urlUtils.urlFor('home', true))) {
|
||
// we can safely request a 1200px image - Ghost will serve the original if it's smaller
|
||
return {
|
||
href: href.replace(/\/content\/images\//, '/content/images/size/w1200/'),
|
||
width: size.width
|
||
};
|
||
}
|
||
|
||
return {
|
||
href,
|
||
width: size.width
|
||
};
|
||
} catch (err) {
|
||
// log and proceed. Using original header image without fixed width isn't fatal.
|
||
logging.error(err);
|
||
}
|
||
}
|
||
|
||
return {
|
||
href,
|
||
width: 0
|
||
};
|
||
}
|
||
}
|
||
|
||
module.exports = EmailRenderer;
|