Added RelatedContentsController

app/controllers/related_contents_controller.rb

@@ -0,0 +1,43 @@
+class RelatedContentsController < ApplicationController
+  RELATIONABLE_MODELS = %w{proposals debates}
+  VALID_URL = /#{Setting['url']}\/.*\/.*/
+
+  skip_authorization_check
+
+  def create
+    if relationable_object && related_object
+      @relationable.relate_content(@related)
+
+      flash[:success] = t('related_content.success')
+    else
+      flash[:error] = t('related_content.error', url: Setting['url'])
+    end
+
+    redirect_to @relationable
+  end
+
+  private
+
+  def valid_url?
+    params[:url].match(VALID_URL)
+  end
+
+  def relationable_object
+    @relationable = (params[:relationable_klass].singularize.camelize.constantize).find_by_id(params[:relationable_id])
+  end
+
+  def related_object
+    begin
+      if valid_url?
+        url = params[:url]
+
+        related_klass = url.match(/\/(#{RELATIONABLE_MODELS.join("|")})\//)[0].gsub("/", "")
+        related_id = url.match(/\/[0-9]+/)[0].gsub("/", "")
+
+        @related = (related_klass.singularize.camelize.constantize).find_by_id(related_id)
+      end
+    rescue
+      nil
+    end
+  end
+end

config/routes.rb

@@ -462,6 +462,8 @@ Rails.application.routes.draw do
     root to: "dashboard#index"
   end
 
+  resources :related_contents, only: [:create]
+
   # GraphQL
   get '/graphql', to: 'graphql#query'
   post '/graphql', to: 'graphql#query'