Initial commit

app/controllers/contract_templates/qr_codes_controller.rb

@@ -0,0 +1,28 @@
+class ContractTemplates::QrCodesController < ApplicationController
+  before_action :set_contract_template
+
+  def show
+    send_file qr_code.to_png, download_attributes
+  end
+
+  private
+
+  def contract_templates
+    policy_scope(ContractTemplate)
+  end
+
+  def set_contract_template
+    @contract_template = contract_templates.find(params[:contract_template_id])
+  end
+
+  def qr_code
+    authorize QrCode.build_from_contract_template(@contract_template)
+  end
+
+  def download_attributes
+    {
+      filename: qr_code.filename,
+      type: "image/png",
+    }
+  end
+end