Add sdg management header controller

app/controllers/sdg_management/header_controller.rb

@@ -0,0 +1,29 @@
+class SDGManagement::HeaderController < SDGManagement::BaseController
+  include Admin::Widget::CardsActions
+  helper_method :index_path
+
+  before_action :load_cardable
+  load_and_authorize_resource :header,
+                              class: "Widget::Card",
+                              through: :cardable,
+                              singleton: true,
+                              instance_name: :card
+
+  private
+
+    def load_cardable
+      @cardable = WebSection.find_by!(name: "sdg")
+    end
+
+    def index_path
+      sdg_management_homepage_path
+    end
+
+    def form_path
+      sdg_management_homepage_header_path
+    end
+
+    def header_params
+      card_params
+    end
+end

app/models/web_section.rb

@@ -1,4 +1,5 @@
 class WebSection < ApplicationRecord
   has_many :sections
   has_many :banners, through: :sections
+  has_one :header, class_name: "Widget::Card", as: :cardable, dependent: :destroy
 end

config/routes/sdg_management.rb

@@ -4,7 +4,9 @@ namespace :sdg_management do
   resources :goals, only: [:index]
   resources :targets, only: [:index]
   resources :local_targets, except: [:show]
-  resource :homepage, controller: :homepage, only: [:show]
+  resource :homepage, controller: :homepage, only: [:show] do
+    resource :header, controller: :header, only: [:new, :create, :edit, :update, :destroy]
+  end
 
   resources :phases, only: [], as: :sdg_phases do
     resources :cards, except: [:index, :show], as: :widget_cards