Support /child_epic quick action when creating epics

Allow to assign child epics with quick actions when creating epics

ee/app/services/epics/base_service.rb

@@ -4,7 +4,7 @@ module Epics
   class BaseService < IssuableBaseService
     extend ::Gitlab::Utils::Override
 
-    attr_reader :group, :parent_epic
+    attr_reader :group, :parent_epic, :child_epic
 
     def initialize(group, current_user, params = {})
       @group, @current_user, @params = group, current_user, params
@@ -21,6 +21,7 @@ module Epics
 
     def set_quick_action_params
       @parent_epic = params.delete(:quick_action_assign_to_parent_epic)
+      @child_epic = params.delete(:quick_action_assign_child_epic)
     end
 
     def assign_parent_epic_for(epic)
@@ -29,6 +30,12 @@ module Epics
       EpicLinks::CreateService.new(parent_epic, current_user, { target_issuable: epic }).execute
     end
 
+    def assign_child_epic_for(epic)
+      return unless child_epic
+
+      EpicLinks::CreateService.new(epic, current_user, { target_issuable: child_epic }).execute
+    end
+
     def available_labels
       @available_labels ||= LabelsFinder.new(
         current_user,

ee/app/services/epics/create_service.rb

@@ -24,6 +24,7 @@ module Epics
 
     def after_create(epic)
       assign_parent_epic_for(epic)
+      assign_child_epic_for(epic)
     end
 
     def set_date_params

ee/app/services/epics/update_service.rb

@@ -22,6 +22,7 @@ module Epics
       end
 
       assign_parent_epic_for(epic)
+      assign_child_epic_for(epic)
 
       epic
     end

ee/changelogs/unreleased/issue_293842.yml

+---
+title: Support /child quick action when creating epics
+merge_request: 53073
+author:
+type: added

ee/lib/ee/gitlab/quick_actions/epic_actions.rb

@@ -15,12 +15,12 @@ module EE
             _("Adds %{epic_ref} as child epic.") % { epic_ref: child_epic.to_reference(quick_action_target) } if child_epic
           end
           types Epic
-          condition { action_allowed_only_on_update? }
+          condition { action_allowed? }
           params '<&epic | group&epic | Epic URL>'
           command :child_epic do |epic_param|
             child_epic = extract_epic(epic_param)
 
-            @execution_message[:child_epic] = add_child_epic(quick_action_target, child_epic)
+            @execution_message[:child_epic] = set_child_epic_update(quick_action_target, child_epic)
           end
 
           desc _('Remove child epic from an epic')
@@ -102,12 +102,12 @@ module EE
             epic.child?(target_epic.id) || target_epic.child?(epic.id)
           end
 
-          def add_child_epic(target_epic, child_epic)
+          def set_child_epic_update(target_epic, child_epic)
             return child_error_message(:not_present) unless child_epic.present?
             return child_error_message(:already_related) if epics_related?(child_epic, target_epic)
             return child_error_message(:no_permission) unless current_user.can?(:read_epic, child_epic)
 
-            EpicLinks::CreateService.new(target_epic, current_user, { target_issuable: child_epic }).execute
+            @updates[:quick_action_assign_child_epic] = child_epic
 
             _("Added %{epic_ref} as a child epic.") % { epic_ref: child_epic.to_reference(target_epic) }
           end

ee/spec/services/epics/create_service_spec.rb

@@ -84,12 +84,12 @@ RSpec.describe Epics::CreateService do
       end
 
       context 'when description param has quick action' do
-        context 'for /parent_epic' do
         before do
           stub_licensed_features(epics: true, subepics: true)
           group.add_developer(user)
         end
 
+        context 'for /parent_epic' do
           it 'assigns parent epic' do
             parent_epic = create(:epic, group: group)
             description = "/parent_epic #{parent_epic.to_reference}"
@@ -113,6 +113,31 @@ RSpec.describe Epics::CreateService do
             end
           end
         end
+
+        context 'for /child_epic' do
+          it 'sets a child epic' do
+            child_epic = create(:epic, group: group)
+            description = "/child_epic #{child_epic.to_reference}"
+            params = { title: 'New epic with child', description: description }
+
+            epic = described_class.new(group, user, params).execute
+
+            expect(epic.reload.children).to include(child_epic)
+          end
+
+          context 'when child epic cannot be assigned' do
+            it 'does not set child epic' do
+              other_group = create(:group, :private)
+              child_epic = create(:epic, group: other_group)
+              description = "/child_epic #{child_epic.to_reference(group)}"
+              params = { title: 'New epic with child', description: description }
+
+              epic = described_class.new(group, user, params).execute
+
+              expect(epic.reload.children).to be_empty
+            end
+          end
+        end
       end
     end
   end

ee/spec/services/epics/update_service_spec.rb

@@ -308,6 +308,11 @@ RSpec.describe Epics::UpdateService do
     end
 
     context 'with quick actions in the description' do
+      before do
+        stub_licensed_features(epics: true, subepics: true)
+        group.add_developer(user)
+      end
+
       context 'for /label' do
         let(:label) { create(:group_label, group: group) }
 
@@ -319,11 +324,6 @@ RSpec.describe Epics::UpdateService do
       end
 
       context 'for /parent_epic' do
-        before do
-          stub_licensed_features(epics: true, subepics: true)
-          group.add_developer(user)
-        end
-
         it 'assigns parent epic' do
           parent_epic = create(:epic, group: epic.group)
 
@@ -343,6 +343,26 @@ RSpec.describe Epics::UpdateService do
           end
         end
       end
+
+      context 'for /child_epic' do
+        it 'sets a child epic' do
+          child_epic = create(:epic, group: group)
+
+          update_epic(description: "/child_epic #{child_epic.to_reference}")
+
+          expect(epic.reload.children).to include(child_epic)
+        end
+
+        context 'when child epic cannot be assigned' do
+          it 'does not set child epic' do
+            other_group = create(:group, :private)
+            child_epic = create(:epic, group: other_group)
+
+            update_epic(description: "/child_epic #{child_epic.to_reference(group)}")
+            expect(epic.reload.children).to be_empty
+          end
+        end
+      end
     end
   end
 end