Added tags update route. Added sort to user service (#7381)

* Added tags update route. Added sort to user service

* Change update tasks route to reorder tasks

* Fixed linting issue

* Changed params for reorder tags route

* Fixed not found tag and added test

test/api/v3/integration/tags/POST-tag-reorder.test.js

@@ -0,0 +1,44 @@
+import {
+  generateUser,
+  translate as t,
+} from '../../../../helpers/api-integration/v3';
+
+describe('POST /reorder-tags', () => {
+  let user;
+
+  before(async () => {
+    user = await generateUser();
+  });
+
+  it('returns error when no parameters are provided', async () => {
+    await expect(user.post('/reorder-tags'))
+      .to.eventually.be.rejected.and.eql({
+        code: 400,
+        error: 'BadRequest',
+        message: 'Invalid request parameters.',
+      });
+  });
+
+  it('returns error when tag is not found', async () => {
+    await expect(user.post('/reorder-tags', {tagId: 'fake-id', to: 3}))
+      .to.eventually.be.rejected.and.eql({
+        code: 404,
+        error: 'NotFound',
+        message: t('tagNotFound'),
+      });
+  });
+
+  it('updates tags', async () => {
+    let tag1Name = 'Tag 1';
+    let tag2Name = 'Tag 2';
+    await user.post('/tags', {name: tag1Name});
+    await user.post('/tags', {name: tag2Name});
+    await user.sync();
+
+    await user.post('/reorder-tags', {tagId: user.tags[4].id, to: 3});
+    await user.sync();
+
+    expect(user.tags[3].name).to.equal(tag2Name);
+    expect(user.tags[4].name).to.equal(tag1Name);
+  });
+});