Quick actions for adding/removing epic child relations

https://gitlab.com/gitlab-org/gitlab-ee/issues/7330

ee/app/models/ee/epic.rb

@@ -283,6 +283,10 @@ module EE
       issues.any? || descendants.any?
     end
 
+    def child?(id)
+      children.where(id: id).exists?
+    end
+
     def hierarchy
       ::Gitlab::ObjectHierarchy.new(self.class.where(id: id))
     end

ee/app/services/ee/quick_actions/interpret_service.rb

@@ -8,6 +8,7 @@ module EE
       # as doing so would clear any existing command definitions.
       prepended do
         # rubocop: disable Cop/InjectEnterpriseEditionModule
+        include EE::Gitlab::QuickActions::EpicActions
         include EE::Gitlab::QuickActions::IssueActions
         include EE::Gitlab::QuickActions::MergeRequestActions
         include EE::Gitlab::QuickActions::IssueAndMergeRequestActions

ee/changelogs/unreleased/7330-child-epics-quick-actions.yml

+---
+title: Add quick actions for adding and removing child epic relations to epic
+merge_request: 12772
+author:
+type: added

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

+# frozen_string_literal: true
+
+module EE
+  module Gitlab
+    module QuickActions
+      module EpicActions
+        extend ActiveSupport::Concern
+        include ::Gitlab::QuickActions::Dsl
+
+        included do
+          desc _('Add child epic to an epic')
+          explanation do |epic_param|
+            child_epic = extract_epic(epic_param)
+
+            _("Adds %{epic_ref} as child epic.") % { epic_ref: child_epic.to_reference(quick_action_target) } if child_epic
+          end
+          types Epic
+          condition { action_allowed? }
+          params '<&epic | group&epic | Epic URL>'
+          command :child_epic do |epic_param|
+            child_epic = extract_epic(epic_param)
+
+            if child_epic && !quick_action_target.child?(child_epic.id)
+              EpicLinks::CreateService.new(quick_action_target, current_user, { target_issuable: child_epic }).execute
+            end
+          end
+
+          desc _('Remove child epic from an epic')
+          explanation do |epic_param|
+            child_epic = extract_epic(epic_param)
+
+            _("Removes %{epic_ref} from child epics.") % { epic_ref: child_epic.to_reference(quick_action_target) } if child_epic
+          end
+          types Epic
+          condition { action_allowed? }
+          params '<&epic | group&epic | Epic URL>'
+          command :remove_child_epic do |epic_param|
+            child_epic = extract_epic(epic_param)
+
+            if child_epic && quick_action_target.child?(child_epic.id)
+              EpicLinks::DestroyService.new(child_epic, current_user).execute
+            end
+          end
+
+          private
+
+          def extract_epic(params)
+            return if params.nil?
+
+            extract_references(params, :epic).first
+          end
+
+          def action_allowed?
+            quick_action_target.group&.feature_available?(:epics) &&
+              current_user.can?(:"admin_#{quick_action_target.to_ability_name}", quick_action_target)
+          end
+        end
+      end
+    end
+  end
+end

ee/spec/services/groups/autocomplete_service_spec.rb

@@ -103,7 +103,7 @@ describe Groups::AutocompleteService do
       it 'returns available commands' do
         expect(subject.commands(epic).map { |c| c[:name] })
           .to match_array(
-            [:todo, :unsubscribe, :award, :shrug, :tableflip, :cc, :title, :close]
+            [:todo, :unsubscribe, :award, :shrug, :tableflip, :cc, :title, :close, :child_epic, :remove_child_epic]
           )
       end
     end

locale/gitlab.pot

@@ -663,6 +663,9 @@ msgstr ""
 msgid "Add bold text"
 msgstr ""
 
+msgid "Add child epic to an epic"
+msgstr ""
+
 msgid "Add comment now"
 msgstr ""
 
@@ -735,6 +738,9 @@ msgstr ""
 msgid "Adds"
 msgstr ""
 
+msgid "Adds %{epic_ref} as child epic."
+msgstr ""
+
 msgid "Adds a todo."
 msgstr ""
 
@@ -10403,6 +10409,9 @@ msgstr ""
 msgid "Remove avatar"
 msgstr ""
 
+msgid "Remove child epic from an epic"
+msgstr ""
+
 msgid "Remove due date"
 msgstr ""
 
@@ -10445,6 +10454,9 @@ msgstr ""
 msgid "Removed projects cannot be restored!"
 msgstr ""
 
+msgid "Removes %{epic_ref} from child epics."
+msgstr ""
+
 msgid "Removes %{milestone_reference} milestone."
 msgstr ""