Redesign admin instances area (#9645)

app/controllers/admin/instances_controller.rb

@@ -4,14 +4,21 @@ module Admin
   class InstancesController < BaseController
     def index
       authorize :instance, :index?
+
       @instances = ordered_instances
     end
 
-    def resubscribe
-      authorize :instance, :resubscribe?
-      params.require(:by_domain)
-      Pubsubhubbub::SubscribeWorker.push_bulk(subscribeable_accounts.pluck(:id))
-      redirect_to admin_instances_path
+    def show
+      authorize :instance, :show?
+
+      @instance        = Instance.new(Account.by_domain_accounts.find_by(domain: params[:id]) || DomainBlock.find_by!(domain: params[:id]))
+      @following_count = Follow.where(account: Account.where(domain: params[:id])).count
+      @followers_count = Follow.where(target_account: Account.where(domain: params[:id])).count
+      @reports_count   = Report.where(target_account: Account.where(domain: params[:id])).count
+      @blocks_count    = Block.where(target_account: Account.where(domain: params[:id])).count
+      @available       = DeliveryFailureTracker.available?(Account.select(:shared_inbox_url).where(domain: params[:id]).first&.shared_inbox_url)
+      @media_storage   = MediaAttachment.where(account: Account.where(domain: params[:id])).sum(:file_file_size)
+      @domain_block    = DomainBlock.find_by(domain: params[:id])
     end
 
     private
@@ -27,17 +34,11 @@ module Admin
     helper_method :paginated_instances
 
     def ordered_instances
-      paginated_instances.map { |account| Instance.new(account) }
-    end
-
-    def subscribeable_accounts
-      Account.remote.where(protocol: :ostatus).where(domain: params[:by_domain])
+      paginated_instances.map { |resource| Instance.new(resource) }
     end
 
     def filter_params
-      params.permit(
-        :domain_name
-      )
+      params.permit(:limited)
     end
   end
 end