Add PDF generation for QR codes

app/controllers/contestants_controller.rb

@@ -2,7 +2,7 @@ class ContestantsController < ApplicationController
   include CompletionsConcern
   include ContestantsConcern
 
-  before_action :set_contest, only: %i[ index edit new create update destroy import upload_csv convert_csv finalize_import export generate_qrcodes ]
+  before_action :set_contest, only: %i[ index edit new create update destroy import upload_csv convert_csv finalize_import export generate_qrcodes generate_qrcodes_pdf ]
   before_action :set_contestant, only: %i[ destroy edit update]
   before_action :set_completions, only: %i[edit update ]
   skip_before_action :require_authentication, only: %i[ get_public_completion post_public_completion public_completion_updated ]
@@ -96,7 +96,6 @@ class ContestantsController < ApplicationController
           if @form.email_column == -1
             Contestant.create(name: row[@form.name_column], contest: @contest)
           else
-            logger.info("Email")
             Contestant.create(name: row[@form.name_column], email: row[@form.email_column], contest: @contest)
           end
         end
@@ -115,7 +114,7 @@ class ContestantsController < ApplicationController
     respond_to do |format|
       format.csv do
         response.headers["Content-Type"] = "text/csv"
-        response.headers["Content-Disposition"] = "attachment; filename=export.csv"
+        response.headers["Content-Disposition"] = "attachment; filename=#{contest.friendly_id}_results.csv"
       end
     end
   end
@@ -126,6 +125,18 @@ class ContestantsController < ApplicationController
     @contestants = @contest.contestants.sort_by { |contestant| contestant.name }
   end
 
+  def generate_qrcodes_pdf
+    authorize @contest
+
+    @contestants = @contest.contestants.sort_by { |contestant| contestant.name }
+    @nonav = true
+
+    respond_to do |format|
+      format.html
+      format.pdf { render ferrum_pdf: {}, disposition: :inline, filename: "#{@contest.friendly_id}_qrcodes.pdf", layout: "blank" }
+    end
+  end
+
   def get_public_completion
     skip_authorization