Downgrade support bot code to core

One of the tasks to downgrade service desk feature to core

app/models/project.rb

@@ -2410,6 +2410,11 @@ class Project < ApplicationRecord
     super || build_metrics_setting
   end
 
+  def service_desk_enabled
+    false
+  end
+  alias_method :service_desk_enabled?, :service_desk_enabled
+
   private
 
   def find_service(services, name)

app/models/user.rb

@@ -655,6 +655,15 @@ class User < ApplicationRecord
       end
     end
 
+    def support_bot
+      email_pattern = "support%s@#{Settings.gitlab.host}"
+
+      unique_internal(where(user_type: :support_bot), 'support-bot', email_pattern) do |u|
+        u.bio = 'The GitLab support bot used for Service Desk'
+        u.name = 'GitLab Support Bot'
+      end
+    end
+
     # Return true if there is only single non-internal user in the deployment,
     # ghost user is ignored.
     def single_user?

app/policies/base_policy.rb

@@ -21,6 +21,10 @@ class BasePolicy < DeclarativePolicy::Base
   with_options scope: :user, score: 0
   condition(:deactivated) { @user&.deactivated? }
 
+  desc "User is support bot"
+  with_options scope: :user, score: 0
+  condition(:support_bot) { @user&.support_bot? }
+
   desc "User email is unconfirmed or user account is locked"
   with_options scope: :user, score: 0
   condition(:inactive) do

app/policies/concerns/policy_actor.rb

@@ -45,6 +45,10 @@ module PolicyActor
     false
   end
 
+  def support_bot?
+    false
+  end
+
   def deactivated?
     false
   end

app/policies/project_policy.rb

@@ -123,6 +123,9 @@ class ProjectPolicy < BasePolicy
     !@subject.design_management_enabled?
   end
 
+  with_scope :subject
+  condition(:service_desk_enabled) { @subject.service_desk_enabled? }
+
   # We aren't checking `:read_issue` or `:read_merge_request` in this case
   # because it could be possible for a user to see an issuable-iid
   # (`:read_issue_iid` or `:read_merge_request_iid`) but then wouldn't be
@@ -576,6 +579,12 @@ class ProjectPolicy < BasePolicy
     enable :read_build_report_results
   end
 
+  rule { support_bot }.enable :guest_access
+  rule { support_bot & ~service_desk_enabled }.policy do
+    prevent :create_note
+    prevent :read_project
+  end
+
   private
 
   def team_member?
@@ -624,6 +633,7 @@ class ProjectPolicy < BasePolicy
 
   def lookup_access_level!
     return ::Gitlab::Access::REPORTER if alert_bot?
+    return ::Gitlab::Access::REPORTER if support_bot? && service_desk_enabled?
 
     # NOTE: max_member_access has its own cache
     project.team.max_member_access(@user.id)

ee/app/models/ee/project.rb

@@ -325,8 +325,9 @@ module EE
         feature_available?(:github_project_service_integration)
     end
 
+    override :service_desk_enabled
     def service_desk_enabled
-      ::EE::Gitlab::ServiceDesk.enabled?(project: self) && super
+      ::EE::Gitlab::ServiceDesk.enabled?(project: self) && self[:service_desk_enabled]
     end
     alias_method :service_desk_enabled?, :service_desk_enabled
 

ee/app/models/ee/user.rb

@@ -95,15 +95,6 @@ module EE
     class_methods do
       extend ::Gitlab::Utils::Override
 
-      def support_bot
-        email_pattern = "support%s@#{Settings.gitlab.host}"
-
-        unique_internal(where(user_type: :support_bot), 'support-bot', email_pattern) do |u|
-          u.bio = 'The GitLab support bot used for Service Desk'
-          u.name = 'GitLab Support Bot'
-        end
-      end
-
       def visual_review_bot
         email_pattern = "visual_review%s@#{Settings.gitlab.host}"
 

ee/app/policies/ee/base_policy.rb

@@ -8,9 +8,6 @@ module EE
       with_scope :user
       condition(:auditor, score: 0) { @user&.auditor? }
 
-      with_scope :user
-      condition(:support_bot, score: 0) { @user&.support_bot? }
-
       with_scope :user
       condition(:visual_review_bot, score: 0) { @user&.visual_review_bot? }
 

ee/app/policies/ee/policy_actor.rb

@@ -6,10 +6,6 @@ module EE
       false
     end
 
-    def support_bot?
-      false
-    end
-
     def visual_review_bot?
       false
     end

ee/app/policies/ee/project_policy.rb

@@ -18,9 +18,6 @@ module EE
     ].freeze
 
     prepended do
-      with_scope :subject
-      condition(:service_desk_enabled) { @subject.service_desk_enabled? }
-
       with_scope :subject
       condition(:related_issues_disabled) { !@subject.feature_available?(:related_issues) }
 
@@ -175,12 +172,6 @@ module EE
         @subject.feature_available?(:group_timelogs)
       end
 
-      rule { support_bot }.enable :guest_access
-      rule { support_bot & ~service_desk_enabled }.policy do
-        prevent :create_note
-        prevent :read_project
-      end
-
       rule { visual_review_bot }.policy do
         prevent :read_note
         enable :create_note
@@ -412,7 +403,6 @@ module EE
     override :lookup_access_level!
     def lookup_access_level!
       return ::Gitlab::Access::NO_ACCESS if needs_new_sso_session?
-      return ::Gitlab::Access::REPORTER if support_bot? && service_desk_enabled?
       return ::Gitlab::Access::NO_ACCESS if visual_review_bot?
 
       super

ee/spec/models/user_spec.rb

@@ -1060,7 +1060,6 @@ RSpec.describe User do
 
       where(:user_type, :expected_result) do
         'service_user'      | true
-        'support_bot'       | false
         'visual_review_bot' | false
       end
 

ee/spec/policies/project_policy_spec.rb

@@ -1001,34 +1001,6 @@ RSpec.describe ProjectPolicy do
     end
   end
 
-  context 'support bot' do
-    let(:current_user) { User.support_bot }
-
-    context 'with service desk disabled' do
-      it { expect_allowed(:guest_access) }
-      it { expect_disallowed(:create_note, :read_project) }
-    end
-
-    context 'with service desk enabled' do
-      let(:project) { create(:project, :public, service_desk_enabled: true) }
-
-      before do
-        allow(::EE::Gitlab::ServiceDesk).to receive(:enabled?).and_return(true)
-        allow(::EE::Gitlab::ServiceDesk).to receive(:enabled?).with(project: project).and_return(true)
-      end
-
-      it { expect_allowed(:reporter_access, :create_note, :read_issue) }
-
-      context 'when issues are protected members only' do
-        before do
-          project.project_feature.update!(issues_access_level: ProjectFeature::PRIVATE)
-        end
-
-        it { expect_allowed(:reporter_access, :create_note, :read_issue) }
-      end
-    end
-  end
-
   context 'visual review bot' do
     let(:current_user) { User.visual_review_bot }
 

spec/models/user_spec.rb

@@ -4634,7 +4634,8 @@ describe User do
           [
             { state: 'blocked' },
             { user_type: :ghost },
-            { user_type: :alert_bot }
+            { user_type: :alert_bot },
+            { user_type: :support_bot }
           ]
         end
 
@@ -4688,6 +4689,7 @@ describe User do
       where(:user_type, :expected_result) do
         'human'             | true
         'alert_bot'         | false
+        'support_bot'       | false
       end
 
       with_them do
@@ -4756,19 +4758,26 @@ describe User do
     end
   end
 
-  describe '#migration_bot' do
-    it 'creates the user if it does not exist' do
-      expect do
-        described_class.migration_bot
-      end.to change { User.where(user_type: :migration_bot).count }.by(1)
-    end
+  context 'bot users' do
+    shared_examples 'bot users' do |bot_type|
+      it 'creates the user if it does not exist' do
+        expect do
+          described_class.public_send(bot_type)
+        end.to change { User.where(user_type: bot_type).count }.by(1)
+      end
 
-    it 'does not create a new user if it already exists' do
-      described_class.migration_bot
+      it 'does not create a new user if it already exists' do
+        described_class.public_send(bot_type)
 
-      expect do
-        described_class.migration_bot
-      end.not_to change { User.count }
+        expect do
+          described_class.public_send(bot_type)
+        end.not_to change { User.count }
+      end
     end
+
+    it_behaves_like 'bot users', :alert_bot
+    it_behaves_like 'bot users', :support_bot
+    it_behaves_like 'bot users', :migration_bot
+    it_behaves_like 'bot users', :ghost
   end
 end

spec/policies/project_policy_spec.rb

@@ -496,6 +496,33 @@ describe ProjectPolicy do
     end
   end
 
+  context 'support bot' do
+    let(:current_user) { User.support_bot }
+
+    subject { described_class.new(current_user, project) }
+
+    context 'with service desk disabled' do
+      it { expect_allowed(:guest_access) }
+      it { expect_disallowed(:create_note, :read_project) }
+    end
+
+    context 'with service desk enabled' do
+      before do
+        allow(project).to receive(:service_desk_enabled?).and_return(true)
+      end
+
+      it { expect_allowed(:reporter_access, :create_note, :read_issue) }
+
+      context 'when issues are protected members only' do
+        before do
+          project.project_feature.update!(issues_access_level: ProjectFeature::PRIVATE)
+        end
+
+        it { expect_allowed(:reporter_access, :create_note, :read_issue) }
+      end
+    end
+  end
+
   describe 'read_prometheus_alerts' do
     subject { described_class.new(current_user, project) }