Hide issue contacts and quick actions

This MR hides the issue contacts widget in the right sidebar
and the /add_contacts and /remove_contacts quick actions
when there are no contacts in the group or ancestors.

Changelog: added

app/controllers/concerns/issuable_actions.rb

@@ -17,7 +17,10 @@ module IssuableActions
   def show
     respond_to do |format|
       format.html do
-        @show_crm_contacts = issuable.is_a?(Issue) && can?(current_user, :read_crm_contact, issuable.project.group) # rubocop:disable Gitlab/ModuleWithInstanceVariables
+        @show_crm_contacts = issuable.is_a?(Issue) && # rubocop:disable Gitlab/ModuleWithInstanceVariables
+          can?(current_user, :read_crm_contact, issuable.project.group) &&
+          CustomerRelations::Contact.exists_for_group?(issuable.project.group)
+
         @issuable_sidebar = serializer.represent(issuable, serializer: 'sidebar') # rubocop:disable Gitlab/ModuleWithInstanceVariables
         render 'show'
       end

app/models/customer_relations/contact.rb

@@ -33,6 +33,12 @@ class CustomerRelations::Contact < ApplicationRecord
       .pluck(:id)
   end
 
+  def self.exists_for_group?(group)
+    return false unless group
+
+    exists?(group_id: group.self_and_ancestor_ids)
+  end
+
   private
 
   def validate_email_format

lib/gitlab/quick_actions/issue_actions.rb

@@ -290,7 +290,8 @@ module Gitlab
         params 'contact@example.com person@example.org'
         types Issue
         condition do
-          current_user.can?(:set_issue_crm_contacts, quick_action_target)
+          current_user.can?(:set_issue_crm_contacts, quick_action_target) &&
+            CustomerRelations::Contact.exists_for_group?(quick_action_target.project.group)
         end
         execution_message do
           _('One or more contacts were successfully added.')
@@ -304,7 +305,8 @@ module Gitlab
         params 'contact@example.com person@example.org'
         types Issue
         condition do
-          current_user.can?(:set_issue_crm_contacts, quick_action_target)
+          current_user.can?(:set_issue_crm_contacts, quick_action_target) &&
+            CustomerRelations::Contact.exists_for_group?(quick_action_target.project.group)
         end
         execution_message do
           _('One or more contacts were successfully removed.')

spec/models/customer_relations/contact_spec.rb

@@ -98,4 +98,31 @@ RSpec.describe CustomerRelations::Contact, type: :model do
       expect { described_class.find_ids_by_emails(group, Array(0..too_many_emails)) }.to raise_error(ArgumentError)
     end
   end
+
+  describe '#self.exists_for_group?' do
+    let(:group) { create(:group) }
+    let(:subgroup) { create(:group, parent: group) }
+
+    context 'with no contacts in group or parent' do
+      it 'returns false' do
+        expect(described_class.exists_for_group?(subgroup)).to be_falsey
+      end
+    end
+
+    context 'with contacts in group' do
+      it 'returns true' do
+        create(:contact, group: subgroup)
+
+        expect(described_class.exists_for_group?(subgroup)).to be_truthy
+      end
+    end
+
+    context 'with contacts in parent' do
+      it 'returns true' do
+        create(:contact, group: group)
+
+        expect(described_class.exists_for_group?(subgroup)).to be_truthy
+      end
+    end
+  end
 end

spec/services/quick_actions/interpret_service_spec.rb

@@ -2598,6 +2598,45 @@ RSpec.describe QuickActions::InterpretService do
         expect(service.commands_executed_count).to eq(3)
       end
     end
+
+    describe 'crm commands' do
+      let(:add_contacts) { '/add_contacts' }
+      let(:remove_contacts) { '/remove_contacts' }
+
+      before_all do
+        group.add_developer(developer)
+      end
+
+      context 'when group has no contacts' do
+        it '/add_contacts is not available' do
+          _, explanations = service.explain(add_contacts, issue)
+
+          expect(explanations).to be_empty
+        end
+
+        it '/remove_contacts is not available' do
+          _, explanations = service.explain(remove_contacts, issue)
+
+          expect(explanations).to be_empty
+        end
+      end
+
+      context 'when group has contacts' do
+        let!(:contact) { create(:contact, group: group) }
+
+        it '/add_contacts is available' do
+          _, explanations = service.explain(add_contacts, issue)
+
+          expect(explanations).to contain_exactly("Add customer relation contact(s).")
+        end
+
+        it '/remove_contacts is available' do
+          _, explanations = service.explain(remove_contacts, issue)
+
+          expect(explanations).to contain_exactly("Remove customer relation contact(s).")
+        end
+      end
+    end
   end
 
   describe '#available_commands' do