feat(grants-collaboration): expose unfollow for grant

packages/server/__tests__/api/grants.test.js

@@ -879,6 +879,23 @@ HHS-2021-IHS-TPI-0001,Community Health Aide Program:  Tribal Planning &`;
         });
     });
 
+    context('DELETE api/grants/:grantId/follow', () => {
+        const GRANT_ID = '335255';
+
+        beforeEach(async () => {
+            await knex('grant_followers').insert({ grant_id: GRANT_ID, user_id: staffUser.id });
+        });
+
+        it('deletes follower record for request user', async () => {
+            const resp = await fetchApi(`/grants/${GRANT_ID}/follow`, agencies.own, {
+                ...fetchOptions.staff,
+                method: 'delete',
+            });
+
+            expect(resp.statusText).to.equal('OK');
+        });
+    });
+
     context('GET api/grants/:grantId/notes', () => {
         const GRANT_ID = '335255';
 

packages/server/src/routes/grants.js

@@ -5,7 +5,9 @@ const db = require('../db');
 const email = require('../lib/email');
 const { requireUser, isUserAuthorized } = require('../lib/access-helpers');
 const knex = require('../db/connection');
-const { saveNoteRevision, followGrant, getOrganizationNotesForGrant } = require('../lib/grantsCollaboration');
+const {
+    saveNoteRevision, followGrant, unfollowGrant, getOrganizationNotesForGrant,
+} = require('../lib/grantsCollaboration');
 
 const router = express.Router({ mergeParams: true });
 
@@ -424,6 +426,14 @@ router.delete('/:grantId/interested/:agencyId', requireUser, async (req, res) =>
     res.json({});
 });
 
+router.delete('/:grantId/follow', requireUser, async (req, res) => {
+    const { user } = req.session;
+    const { grantId } = req.params;
+
+    await unfollowGrant(knex, grantId, user.id);
+    res.json({});
+});
+
 router.get('/:grantId/notes', requireUser, async (req, res) => {
     const { grantId } = req.params;
     const { user } = req.session;