Refactored staff-service

This moves the shared data between all templates into a method so that
it's calculated in a single place, as well as exposing separate render
methods for HTML and Text. We've also added some new custom helpers
for use in the handlebars templates

ghost/staff-service/lib/emails.js

@@ -162,6 +162,23 @@ class StaffServiceEmails {
         }
     }
 
+    /**
+     * @param {object} recipient
+     * @param {string} recipient.email
+     * @param {string} recipient.slug
+     */
+    async getSharedData(recipient) {
+        return {
+            siteTitle: this.settingsCache.get('title'),
+            siteUrl: this.urlUtils.getSiteUrl(),
+            siteDomain: this.siteDomain,
+            accentColor: this.settingsCache.get('accent_color'),
+            fromEmail: this.fromEmailAddress,
+            toEmail: recipient.email,
+            staffUrl: this.urlUtils.urlJoin(this.urlUtils.urlFor('admin', true), '#', `/settings/staff/${recipient.slug}`)
+        };
+    }
+
     /**
      *
      * @param {object} eventData
@@ -322,13 +339,53 @@ class StaffServiceEmails {
         });
     }
 
-    async renderEmailTemplate(templateName, data) {
+    async renderHTML(templateName, data) {
         const htmlTemplateSource = await fs.readFile(path.join(__dirname, './email-templates/', `${templateName}.hbs`), 'utf8');
         const htmlTemplate = this.Handlebars.compile(Buffer.from(htmlTemplateSource).toString());
+
+        this.Handlebars.registerHelper('eq', function (arg, value, options) {
+            if (arg === value) {
+                return options.fn(this);
+            } else {
+                return options.inverse(this);
+            }
+        });
+
+        this.Handlebars.registerHelper('limit', function (array, limit) {
+            if (!Array.isArray(array)) {
+                return [];
+            }
+            return array.slice(0,limit);
+        });
+
+        let sharedData = {};
+        if (data.recipient) {
+            sharedData = await this.getSharedData(data.recipient);
+        }
+
+        return htmlTemplate({
+            ...data,
+            ...sharedData
+        });
+    }
+
+    async renderText(templateName, data) {
         const textTemplate = require(`./email-templates/${templateName}.txt.js`);
 
-        const html = htmlTemplate(data);
-        const text = textTemplate(data);
+        let sharedData = {};
+        if (data.recipient) {
+            sharedData = await this.getSharedData(data.recipient);
+        }
+
+        return textTemplate({
+            ...data,
+            ...sharedData
+        });
+    }
+
+    async renderEmailTemplate(templateName, data) {
+        const html = await this.renderHTML(templateName, data);
+        const text = await this.renderText(templateName, data);
 
         return {html, text};
     }

ghost/staff-service/test/staff-service.test.js

@@ -4,6 +4,9 @@ const sinon = require('sinon');
 const {MemberCreatedEvent, SubscriptionCancelledEvent, SubscriptionActivatedEvent} = require('@tryghost/member-events');
 const {MilestoneCreatedEvent} = require('@tryghost/milestones');
 
+// Stuff we are testing
+const DomainEvents = require('@tryghost/domain-events');
+
 require('./utils');
 const StaffService = require('../index');
 
@@ -191,6 +194,65 @@ describe('StaffService', function () {
                 subscribeStub.calledWith(MemberCreatedEvent).should.be.true();
                 subscribeStub.calledWith(MilestoneCreatedEvent).should.be.true();
             });
+
+            it('listens to events', async function () {
+                service = new StaffService({
+                    logging: {
+                        info: loggingInfoStub,
+                        warn: () => {},
+                        error: () => {}
+                    },
+                    models: {
+                        User: {
+                            getEmailAlertUsers: getEmailAlertUsersStub
+                        }
+                    },
+                    mailer: {
+                        send: mailStub
+                    },
+                    DomainEvents,
+                    settingsCache,
+                    urlUtils,
+                    settingsHelpers
+                });
+                service.subscribeEvents();
+                sinon.spy(service, 'handleEvent');
+                DomainEvents.dispatch(MemberCreatedEvent.create({
+                    source: 'member',
+                    memberId: 'member-2'
+                }));
+                await DomainEvents.allSettled();
+                service.handleEvent.calledWith(MemberCreatedEvent).should.be.true();
+
+                DomainEvents.dispatch(SubscriptionActivatedEvent.create({
+                    source: 'member',
+                    memberId: 'member-1',
+                    subscriptionId: 'sub-1',
+                    offerId: 'offer-1',
+                    tierId: 'tier-1'
+                }));
+                await DomainEvents.allSettled();
+                service.handleEvent.calledWith(SubscriptionActivatedEvent).should.be.true();
+
+                DomainEvents.dispatch(SubscriptionCancelledEvent.create({
+                    source: 'member',
+                    memberId: 'member-1',
+                    subscriptionId: 'sub-1',
+                    tierId: 'tier-1'
+                }));
+                await DomainEvents.allSettled();
+                service.handleEvent.calledWith(SubscriptionCancelledEvent).should.be.true();
+
+                DomainEvents.dispatch(MilestoneCreatedEvent.create({
+                    milestone: {
+                        type: 'arr',
+                        value: '100',
+                        currency: 'usd'
+                    }
+                }));
+                await DomainEvents.allSettled();
+                service.handleEvent.calledWith(MilestoneCreatedEvent).should.be.true();
+            });
         });
 
         describe('handleEvent', function () {