Added qr code

Added qr code on ticket pdf and ticket show page.

app/assets/stylesheets/osem.css.scss

@@ -99,4 +99,8 @@ p.comment-body {
 .side-nav-btn{
  margin-left: 10px;
  float: left;
+ }
+
+.qr-image{
+  margin-left: 120px;
 }

app/controllers/physical_ticket_controller.rb

@@ -13,6 +13,7 @@ class PhysicalTicketController < ApplicationController
     @file_name = "ticket_for_#{@conference.short_title}"
     @user = @physical_ticket.user
     @ticket_layout = @conference.ticket_layout.to_sym
+    @qrcode_image = RQRCode::QRCode.new(@physical_ticket.token).as_png(size: 180, border_modules: 0)
     respond_to do |format|
       format.html
       format.pdf do

app/pdfs/ticket_pdf.rb

@@ -77,5 +77,9 @@ class TicketPdf < Prawn::Document
     move_up 180
   end
 
-  def draw_fourth_square; end
+  def draw_fourth_square
+    x = @mid_horizontal + (@right - @mid_horizontal - 180) / 2
+    y = cursor - (bounds.top - @mid_vertical - 180) / 2
+    print_qr_code(@physical_ticket.token, pos: [x, y], extent: 180, stroke: false)
+  end
 end

app/views/physical_ticket/show.html.haml

@@ -67,6 +67,7 @@
         = @physical_ticket.ticket_purchase.id
         %br
     .col-md-5.col-md-offset-2.box.well
+      = image_tag(@qrcode_image.to_data_url, class: 'img-responsive qr-image')
   .row
     .col-md-12
       %p.text-left