Refactor invites member method

- rendering 404 for this method was unituitive
  and was also causing issues with use in
  authenticate_user! method.

app/controllers/invites_controller.rb

@@ -4,6 +4,7 @@ class InvitesController < ApplicationController
   include Gitlab::Utils::StrongMemoize
 
   before_action :member
+  before_action :ensure_member_exists
   before_action :invite_details
   skip_before_action :authenticate_user!, only: :decline
 
@@ -59,14 +60,16 @@ class InvitesController < ApplicationController
   end
 
   def member
-    return @member if defined?(@member)
-
-    @token = params[:id]
-    @member = Member.find_by_invite_token(@token)
+    strong_memoize(:member) do
+      @token = params[:id]
+      Member.find_by_invite_token(@token)
+    end
+  end
 
-    return render_404 unless @member
+  def ensure_member_exists
+    return if member
 
-    @member
+    render_404
   end
 
   def authenticate_user!
@@ -76,10 +79,7 @@ class InvitesController < ApplicationController
     notice << "or create an account" if Gitlab::CurrentSettings.allow_signup?
     notice = notice.join(' ') + "."
 
-    # this is temporary finder instead of using member method due to render_404 possibility
-    # will be resolved via https://gitlab.com/gitlab-org/gitlab/-/issues/245325
-    initial_member = Member.find_by_invite_token(params[:id])
-    redirect_params = initial_member ? { invite_email: initial_member.invite_email } : {}
+    redirect_params = member ? { invite_email: member.invite_email } : {}
 
     store_location_for :user, request.fullpath
 
@@ -87,20 +87,20 @@ class InvitesController < ApplicationController
   end
 
   def invite_details
-    @invite_details ||= case @member.source
+    @invite_details ||= case member.source
                         when Project
                           {
-                            name: @member.source.full_name,
-                            url: project_url(@member.source),
+                            name: member.source.full_name,
+                            url: project_url(member.source),
                             title: _("project"),
-                            path: project_path(@member.source)
+                            path: project_path(member.source)
                           }
                         when Group
                           {
-                            name: @member.source.name,
-                            url: group_url(@member.source),
+                            name: member.source.name,
+                            url: group_url(member.source),
                             title: _("group"),
-                            path: group_path(@member.source)
+                            path: group_path(member.source)
                           }
                         end
   end

changelogs/unreleased/245325-refactor-the-invites-controller-member-method.yml

+---
+title: Refactor the invites controller member method
+merge_request: 42727
+author:
+type: other

spec/controllers/invites_controller_spec.rb

@@ -17,8 +17,16 @@ RSpec.describe InvitesController, :snowplow do
     }
   end
 
-  before do
-    controller.instance_variable_set(:@member, member)
+  shared_examples 'invalid token' do
+    context 'when invite token is not valid' do
+      let(:params) { { id: '_bogus_token_' } }
+
+      it 'renders the 404 page' do
+        request
+
+        expect(response).to have_gitlab_http_status(:not_found)
+      end
+    end
   end
 
   describe 'GET #show' do
@@ -39,7 +47,7 @@ RSpec.describe InvitesController, :snowplow do
       end
 
       it 'forces re-confirmation if email does not match signed in user' do
-        member.invite_email = 'bogus@email.com'
+        member.update!(invite_email: 'bogus@email.com')
 
         expect do
           request
@@ -80,6 +88,8 @@ RSpec.describe InvitesController, :snowplow do
           expect_snowplow_event(snowplow_event.merge(action: 'accepted'))
         end
       end
+
+      it_behaves_like 'invalid token'
     end
 
     context 'when not logged in' do
@@ -139,5 +149,27 @@ RSpec.describe InvitesController, :snowplow do
         expect_snowplow_event(snowplow_event.merge(action: 'accepted'))
       end
     end
+
+    it_behaves_like 'invalid token'
+  end
+
+  describe 'POST #decline for link in UI' do
+    before do
+      sign_in(user)
+    end
+
+    subject(:request) { post :decline, params: params }
+
+    it_behaves_like 'invalid token'
+  end
+
+  describe 'GET #decline for link in email' do
+    before do
+      sign_in(user)
+    end
+
+    subject(:request) { get :decline, params: params }
+
+    it_behaves_like 'invalid token'
   end
 end