Use EE modules where needed and prepare to CE backport

app/controllers/boards/issues_controller.rb

 module Boards
   class IssuesController < Boards::ApplicationController
-    include BoardsResponses
+    include EE::BoardsResponses
 
     before_action :authorize_read_issue, only: [:index]
     before_action :authorize_create_issue, only: [:create]
@@ -72,9 +72,9 @@ module Boards
     end
 
     def issue_params
-      params.require(:issue).
-        permit(:title, :milestone_id, :project_id).
-        merge(board_id: params[:board_id], list_id: params[:list_id], request: request)
+      params.require(:issue)
+        .permit(:title, :milestone_id, :project_id)
+        .merge(board_id: params[:board_id], list_id: params[:list_id], request: request)
     end
 
     def serialize_as_json(resource)

app/controllers/boards/lists_controller.rb

 module Boards
   class ListsController < Boards::ApplicationController
-    include BoardsResponses
+    include EE::BoardsResponses
 
     before_action :authorize_admin_list, only: [:create, :update, :destroy, :generate]
     before_action :authorize_read_list, only: [:index]

app/controllers/concerns/boards_responses.rb

-module BoardsResponses
-  # Shared authorizations between projects and groups which
-  # have different policies.
-  def authorize_read_list
-    ability = board.is_group_board? ? :read_group : :read_list
-
-    authorize_action_for!(board.parent, ability)
-  end
-
-  def authorize_read_issue
-    ability = board.is_group_board? ? :read_group : :read_issue
-
-    authorize_action_for!(board.parent, ability)
-  end
-
-  def authorize_update_issue
-    authorize_action_for!(issue, :admin_issue)
-  end
-
-  def authorize_create_issue
-    authorize_action_for!(project, :admin_issue)
-  end
-
-  def authorize_admin_list
-    authorize_action_for!(board.parent, :admin_list)
-  end
-
-  def authorize_action_for!(resource, ability)
-    return render_403 unless can?(current_user, ability, resource)
-  end
-
-  def respond_with_boards
-    respond_with(@boards)
-  end
-
-  def respond_with_board
-    respond_with(@board)
-  end
-
-  def respond_with(resource)
-    respond_to do |format|
-      format.html
-      format.json do
-        render json: serialize_as_json(resource)
-      end
-    end
-  end
-end

app/controllers/concerns/ee/boards_responses.rb

+module EE
+  module BoardsResponses
+    # Shared authorizations between projects and groups which
+    # have different policies.
+    def authorize_read_list
+      ability = board.is_group_board? ? :read_group : :read_list
+
+      authorize_action_for!(board.parent, ability)
+    end
+
+    def authorize_read_issue
+      ability = board.is_group_board? ? :read_group : :read_issue
+
+      authorize_action_for!(board.parent, ability)
+    end
+
+    def authorize_update_issue
+      authorize_action_for!(issue, :admin_issue)
+    end
+
+    def authorize_create_issue
+      authorize_action_for!(project, :admin_issue)
+    end
+
+    def authorize_admin_list
+      authorize_action_for!(board.parent, :admin_list)
+    end
+
+    def authorize_action_for!(resource, ability)
+      return render_403 unless can?(current_user, ability, resource)
+    end
+
+    def respond_with_boards
+      respond_with(@boards)
+    end
+
+    def respond_with_board
+      respond_with(@board)
+    end
+
+    def respond_with(resource)
+      respond_to do |format|
+        format.html
+        format.json do
+          render json: serialize_as_json(resource)
+        end
+      end
+    end
+  end
+end

app/controllers/groups/boards_controller.rb

 class Groups::BoardsController < Groups::ApplicationController
   prepend EE::Boards::BoardsController
-  include BoardsResponses
+  include EE::BoardsResponses
 
   before_action :check_group_issue_boards_available!
   before_action :assign_endpoint_vars

app/controllers/projects/boards_controller.rb

 class Projects::BoardsController < Projects::ApplicationController
   prepend EE::Boards::BoardsController
   include IssuableCollections
-  include BoardsResponses
+  include EE::BoardsResponses
 
   before_action :authorize_read_board!, only: [:index, :show]
   before_action :assign_endpoint_vars

app/helpers/boards_helper.rb

@@ -2,7 +2,7 @@ module BoardsHelper
   prepend EE::BoardsHelper
 
   def board
-     @board ||= @board || @boards.first
+    @board ||= @board || @boards.first
   end
 
   def board_data
@@ -20,9 +20,7 @@ module BoardsHelper
   end
 
   def build_issue_link_base
-    return project_issues_path(@project) unless @board.is_group_board?
-
-    "/#{@board.group.path}/:project_path/issues"
+    project_issues_path(@project)
   end
 
   def current_board_json
@@ -37,11 +35,7 @@ module BoardsHelper
   end
 
   def board_base_url
-    if @project
-      project_boards_path(@project)
-    elsif @group
-      group_boards_path(@group)
-    end
+    project_boards_path(@project)
   end
 
   def multiple_boards_available?
@@ -49,17 +43,11 @@ module BoardsHelper
   end
 
   def board_path(board)
-    @board_path ||= begin
-      if board.is_group_board?
-        group_board_path(current_board_parent, board)
-      else
-        project_board_path(current_board_parent, board)
-      end
-    end
+    @board_path ||= project_board_path(current_board_parent, board)
   end
 
   def current_board_parent
-    @current_board_parent ||= @project || @group
+    @current_board_parent ||= @project
   end
 
   def can_admin_issue?
@@ -72,8 +60,7 @@ module BoardsHelper
       list_labels_path: labels_filter_path(true),
       labels_endpoint: @labels_endpoint,
       namespace_path: @namespace_path,
-      project_path: @project&.try(:path),
-      group_path: @group&.try(:path)
+      project_path: @project&.try(:path)
     }
   end
 
@@ -86,7 +73,6 @@ module BoardsHelper
       first_user: current_user&.username,
       current_user: 'true',
       project_id: @project&.try(:id),
-      group_id: @group&.try(:id),
       null_user: 'true',
       multi_select: 'true',
       'dropdown-header': dropdown_options[:data][:'dropdown-header'],

app/helpers/ee/boards_helper.rb

@@ -4,5 +4,41 @@ module EE
       parent = @group || @project
       super.merge(focus_mode_available: parent.feature_available?(:issue_board_focus_mode).to_s)
     end
+
+    def build_issue_link_base
+      return super unless @board.is_group_board?
+
+      "/#{@board.group.path}/:project_path/issues"
+    end
+
+    def board_base_url
+      return group_boards_path(@group) if @group
+    end
+
+    def board_path(board)
+      @board_path ||= begin
+        if board.is_group_board?
+          group_board_path(current_board_parent, board)
+        else
+          super(board)
+        end
+      end
+    end
+
+    def current_board_parent
+      @current_board_parent ||= @group || super
+    end
+
+    def can_admin_issue?
+      can?(current_user, :admin_issue, current_board_parent)
+    end
+
+    def board_list_data
+      super.merge(group_path: @group&.path)
+    end
+
+    def board_sidebar_user_data
+      super.merge(group_id: @group&.path)
+    end
   end
 end

app/helpers/ee/labels_helper.rb

+module EE
+  module LabelsHelper
+    def labels_filter_path(only_group_labels = false)
+    end
+  end
+end

app/models/ee/group.rb

@@ -7,6 +7,8 @@ module EE
     extend ActiveSupport::Concern
 
     included do
+      has_many :boards
+
       state_machine :ldap_sync_status, namespace: :ldap_sync, initial: :ready do
         state :ready
         state :started

app/models/ee/label.rb

+module EE
+  module Label
+    extend ActiveSupport::Concern
+
+    prepended do
+      scope :on_group_boards, ->(group_id) { with_lists_and_board.where(boards: { group_id: group_id }) }
+    end
+  end
+end

app/models/group.rb

@@ -22,7 +22,6 @@ class Group < Namespace
 
   has_many :requesters, -> { where.not(requested_at: nil) }, dependent: :destroy, as: :source, class_name: 'GroupMember' # rubocop:disable Cop/ActiveRecordDependent
 
-  has_many :boards
   has_many :milestones
   has_many :project_group_links, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
   has_many :shared_projects, through: :project_group_links, source: :project

app/models/label.rb

@@ -3,6 +3,9 @@ class Label < ActiveRecord::Base
   include Referable
   include Subscribable
 
+  # EE specific
+  prepend EE::Label
+
   # Represents a "No Label" state used for filtering Issues and Merge
   # Requests that have no label assigned.
   LabelStruct = Struct.new(:title, :name)
@@ -36,7 +39,6 @@ class Label < ActiveRecord::Base
   scope :with_title, ->(title) { where(title: title) }
   scope :with_lists_and_board, -> { joins(lists: :board).merge(List.movable) }
   scope :on_project_boards, ->(project_id) { with_lists_and_board.where(boards: { project_id: project_id }) }
-  scope :on_group_boards, ->(group_id) { with_lists_and_board.where(boards: { group_id: group_id }) }
 
   def self.prioritized(project)
     joins(:priorities)

app/services/boards/issues/list_service.rb

 module Boards
   module Issues
     class ListService < BaseService
+      prepend EE::Boards::Issues::ListService
+
       def execute
         issues = IssuesFinder.new(current_user, filter_params).execute
         issues = without_board_labels(issues) unless movable_list? || closed_list?
@@ -45,8 +47,7 @@ module Boards
       end
 
       def set_parent
-        param_key = parent.is_a?(Group) ? :group_id : :project_id
-        params[param_key] = parent.id
+        params[:project_id] = @parent.id
       end
 
       def set_state

app/services/ee/boards/issues/list_service.rb

+module EE
+  module Boards
+    module Issues
+      module ListService
+        def set_parent
+          if @parent.is_a?(Group)
+            params[:group_id] = @parent.id
+          else
+            super
+          end
+        end
+      end
+    end
+  end
+end

spec/factories/boards.rb

@@ -10,7 +10,7 @@ FactoryGirl.define do
       parent nil
     end
 
-    after(:build) do |board, evaluator|
+    after(:build, :stub) do |board, evaluator|
       if evaluator.group
         board.group = evaluator.group
       elsif evaluator.group_id