feat: send emails to rsvps on event cancel

cypress/integration/dashboard/events.js

@@ -219,4 +219,40 @@ describe('events dashboard', () => {
       });
     });
   });
+
+  it('emails not cancelled rsvps when event is cancelled', () => {
+    cy.visit('/dashboard/events');
+    cy.findAllByRole('row')
+      .not(':contains("canceled")')
+      .find('a')
+      .first('contains(/dashboard/events/\\d+$)')
+      .click()
+      .invoke('text')
+      .as('eventTitle');
+
+    cy.findByRole('button', { name: 'Cancel' }).click();
+    cy.findByRole('alertdialog').findByText('Confirm').click();
+
+    cy.waitUntilMail('allMail');
+    cy.get('@allMail').mhFirst().as('emails');
+
+    cy.url()
+      .then((url) => parseInt(url.match(/\d+$/)))
+      .as('eventId');
+    cy.get('@eventId')
+      .then((eventId) => cy.getRSVPs(eventId))
+      .then((rsvps) => {
+        const expectedEmails = rsvps
+          .filter((rsvp) => !rsvp.canceled)
+          .map(({ user: { email } }) => email);
+        cy.get('@emails')
+          .mhGetRecipients()
+          .should('have.members', expectedEmails);
+      });
+
+    cy.get('@eventTitle').then((eventTitle) => {
+      cy.get('@emails').mhGetSubject().should('include', eventTitle);
+    });
+    cy.mhDeleteAll();
+  });
 });

server/src/controllers/Events/resolver.ts

@@ -362,7 +362,7 @@ ${unsubscribe}
         const subject = `Venue changed for event ${event.name}`;
         const body = `We have had to change the location of ${event.name}.
 The event is now being held at <br>
-${venue.name} <br> 
+${venue.name} <br>
 ${venue.street_address ? venue.street_address + '<br>' : ''}
 ${venue.city} <br>
 ${venue.region} <br>
@@ -383,6 +383,22 @@ ${unsubscribe}
       data: { canceled: true },
     });
 
+    const notCancelledRsvps = await prisma.rsvps.findMany({
+      where: {
+        event_id: id,
+        canceled: false,
+      },
+      include: { user: true },
+    });
+
+    if (notCancelledRsvps) {
+      const emailList = notCancelledRsvps.map((rsvp) => rsvp.user.email);
+      const subject = `Event ${event.name} cancelled`;
+      const body = `placeholder body`;
+
+      new MailerService(emailList, subject, body).sendEmail();
+    }
+
     return event;
   }