Added email alert trigger for free member signup

refs TryGhost/Team#1826

- fires email alert on free member creation after they finish signing up via checkout link

ghost/core/test/e2e-api/members/send-magic-link.test.js

@@ -55,6 +55,42 @@ describe('sendMagicLink', function () {
         });
     });
 
+    it('triggers email alert for free member signup', async function () {
+        const email = 'newly-created-user-magic-link-test@test.com';
+        await membersAgent.post('/api/send-magic-link')
+            .body({
+                email,
+                emailType: 'signup'
+            })
+            .expectEmptyBody()
+            .expectStatus(201);
+
+        // Check email is sent
+        const mail = mockManager.assert.sentEmail({
+            to: email,
+            subject: /Complete your sign up to Ghost!/
+        });
+
+        // Get link from email
+        const [url] = mail.text.match(/https?:\/\/[^\s]+/);
+        const parsed = new URL(url);
+        const token = parsed.searchParams.get('token');
+
+        // Get member data from token
+        const data = await membersService.api.getMemberDataFromMagicLinkToken(token);
+
+        // Check member alert is sent to site owners
+        mockManager.assert.sentEmail({
+            to: 'jbloggs@example.com',
+            subject: /🥳 Free member signup: newly-created-user-magic-link-test@test.com/
+        });
+
+        // Check member data is returned
+        should(data).match({
+            email
+        });
+    });
+
     it('Converts the urlHistory to the attribution and stores it in the token', async function () {
         const email = 'newly-created-user-magic-link-test-2@test.com';
         await membersAgent.post('/api/send-magic-link')

ghost/members-api/lib/MembersAPI.js

@@ -60,6 +60,7 @@ module.exports = function MembersAPI({
     },
     stripeAPIService,
     offersAPI,
+    staffService,
     labsService,
     newslettersService,
     memberAttributionService
@@ -85,6 +86,7 @@ module.exports = function MembersAPI({
         stripeAPIService,
         tokenService,
         newslettersService,
+        staffService,
         labsService,
         productRepository,
         Member,
@@ -149,6 +151,7 @@ module.exports = function MembersAPI({
         productRepository,
         StripePrice,
         tokenService,
+        staffService,
         sendEmailWithMagicLink
     });
 
@@ -218,6 +221,12 @@ module.exports = function MembersAPI({
             return member;
         }
         const newMember = await users.create({name, email, labels, newsletters, attribution});
+
+        // Notify staff users of new free member signup
+        if (labsService.isSet('emailAlerts')) {
+            await staffService.notifyFreeMemberSignup(newMember.toJSON());
+        }
+
         await MemberLoginEvent.add({member_id: newMember.id});
         return getMemberIdentityData(email);
     }