moves the admin api inside of the /admin namespace

app/controllers/admin/api/stats_controller.rb

@@ -0,0 +1,24 @@
+class Admin::Api::StatsController < Admin::Api::BaseController
+
+  def show
+    unless params[:events].present? || params[:visits].present?
+      return render json: {}, status: :bad_request
+    end
+
+    ds = Ahoy::DataSource.new
+
+    if params[:events].present?
+      event_types = params[:events].split ','
+      event_types.each do |event|
+        ds.add event.titleize, Ahoy::Event.where(name: event).group_by_day(:time).count
+      end
+    end
+
+    if params[:visits].present?
+      ds.add "Visits", Visit.group_by_day(:started_at).count
+    end
+
+    render json: ds.build
+  end
+
+end