Added email-suppression-list service & mock implementation

refs https://github.com/TryGhost/Team/issues/2267

This will eventually be replaced by a Mailgun specific implementation,
but for now we're using mock one which responds with fake data for
local development.

ghost/core/core/boot.js

@@ -290,6 +290,7 @@ async function initServices({config}) {
     const membersEvents = require('./server/services/members-events');
     const linkTracking = require('./server/services/link-tracking');
     const audienceFeedback = require('./server/services/audience-feedback');
+    const emailSuppressionList = require('./server/services/email-suppression-list');
 
     const urlUtils = require('./shared/url-utils');
 
@@ -319,7 +320,8 @@ async function initServices({config}) {
         }),
         comments.init(),
         linkTracking.init(),
-        audienceFeedback.init()
+        audienceFeedback.init(),
+        emailSuppressionList.init()
     ]);
     debug('End: Services');
 

ghost/core/core/server/services/email-suppression-list/index.js

@@ -0,0 +1 @@
+module.exports = require('./service');

ghost/core/core/server/services/email-suppression-list/service.js

@@ -0,0 +1,32 @@
+const {AbstractEmailSuppressionList, EmailSuppressionData} = require('@tryghost/email-suppression-list');
+
+class InMemoryEmailSuppressionList extends AbstractEmailSuppressionList {
+    async removeEmail(email) {
+        if (email === 'fail@member.test') {
+            return false;
+        }
+        return true;
+    }
+
+    async getSuppressionData(email) {
+        if (email === 'spam@member.test') {
+            return new EmailSuppressionData(true, {
+                timestamp: new Date(),
+                reason: 'spam'
+            });
+        }
+        if (email === 'fail@member.test') {
+            return new EmailSuppressionData(true, {
+                timestamp: new Date(),
+                reason: 'fail'
+            });
+        }
+        return new EmailSuppressionData(false);
+    }
+
+    async init() {
+        return;
+    }
+}
+
+module.exports = new InMemoryEmailSuppressionList();

ghost/core/package.json

@@ -74,6 +74,7 @@
     "@tryghost/email-analytics-provider-mailgun": "0.0.0",
     "@tryghost/email-analytics-service": "0.0.0",
     "@tryghost/email-content-generator": "0.0.0",
+    "@tryghost/email-suppression-list": "0.0.0",
     "@tryghost/errors": "1.2.18",
     "@tryghost/express-dynamic-redirects": "0.0.0",
     "@tryghost/helpers": "1.1.74",