mirror of
https://github.com/TryGhost/Ghost.git
synced 2024-12-28 13:22:39 +03:00
a09e86da05
closes https://github.com/TryGhost/Team/issues/2382
The preview text is getting set to subject line in the new email flow so it repeats multiple times in the inbox(subject+preview+title). This was because the new flow doesn't use the post serialisation that the old system did, causing excerpt to be empty in the email rendering.
Old system was using post serialisation here -
a721e4f2d7/ghost/core/core/server/services/mega/post-email-serializer.js (L136-L139).
This change adds explicit method to calculate the preview text for email in email renderer service using same logic as used in old system.
Co-authored-by: Simon Backx <git@simonbackx.com>
685 lines
24 KiB
JavaScript
685 lines
24 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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#storageUtils;
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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 {{isLocalImage(url: string): boolean}} dependencies.storageUtils
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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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storageUtils,
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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.#storageUtils = storageUtils;
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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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originalId: recipientProperty,
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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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// Now loop any replacements with possible invalid characters and replace them with a clean id
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let counter = 1;
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for (const replacement of replacements) {
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if (replacement.id.match(/[^a-zA-Z0-9_]/)) {
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counter += 1;
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replacement.id = replacement.originalId + '_' + counter;
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}
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delete replacement.originalId;
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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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* Get email preheader text from post model
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* @param {object} postModel
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* @returns
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*/
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#getEmailPreheader(postModel) {
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let plaintext = postModel.get('plaintext');
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let customExcerpt = postModel.get('custom_excerpt');
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if (customExcerpt) {
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return customExcerpt;
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} else {
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if (plaintext) {
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return plaintext.substring(0, 500);
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} else {
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return `${postModel.get('title')} – `;
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}
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}
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}
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/**
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* @private
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*/
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async getTemplateData({post, newsletter, html, addPaywall}) {
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const accentColor = this.#settingsCache.get('accent_color') || '#15212A';
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const adjustedAccentColor = accentColor && darkenToContrastThreshold(accentColor, '#ffffff', 2).hex();
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const adjustedAccentContrastColor = accentColor && textColorForBackgroundColor(adjustedAccentColor).hex();
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const color = new Color(accentColor);
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const buttonBackgroundColor = `${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');
|
||
const publishedAt = (post.get('published_at') ? DateTime.fromJSDate(post.get('published_at')) : DateTime.local()).setZone(timezone).toLocaleString({
|
||
year: 'numeric',
|
||
month: 'short',
|
||
day: 'numeric'
|
||
});
|
||
|
||
let authors;
|
||
const postAuthors = await post.getLazyRelation('authors');
|
||
if (postAuthors.models) {
|
||
if (postAuthors.models.length <= 2) {
|
||
authors = postAuthors.models.map(author => author.get('name')).join(' & ');
|
||
} else {
|
||
authors = `${postAuthors.models[0].name} & ${postAuthors.models.length - 1} others`;
|
||
}
|
||
}
|
||
|
||
const postUrl = this.#getPostUrl(post);
|
||
|
||
// Signup URL is the post url with a hash added to it
|
||
const signupUrl = new URL(postUrl);
|
||
signupUrl.hash = `/portal/signup`;
|
||
|
||
// Audience feedback
|
||
const positiveLink = this.#audienceFeedbackService.buildLink(
|
||
'--uuid--',
|
||
post.id,
|
||
1
|
||
).href.replace('--uuid--', '%%{uuid}%%');
|
||
const negativeLink = this.#audienceFeedbackService.buildLink(
|
||
'--uuid--',
|
||
post.id,
|
||
0
|
||
).href.replace('--uuid--', '%%{uuid}%%');
|
||
|
||
const data = {
|
||
site: {
|
||
title: this.#settingsCache.get('title'),
|
||
url: this.#urlUtils.urlFor('home', true),
|
||
iconUrl: this.#settingsCache.get('icon') ?
|
||
this.#urlUtils.urlFor('image', {
|
||
image: this.#settingsCache.get('icon')
|
||
}, true) : null
|
||
},
|
||
preheader: this.#getEmailPreheader(post),
|
||
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;
|
||
}
|
||
|
||
if (this.#storageUtils.isLocalImage(href)) {
|
||
// 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;
|