asda_receipt_scrape_and_post.rb

require 'rubygems'
require 'mechanize'

agent = Mechanize::new
agent.user_agent = "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_0; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.127 Safari/533.4"

begin
  page = agent.get 'http://asdapriceguarantee.co.uk/Compare-Prices/ASDA-receipt.aspx'
rescue Mechanize::ResponseCodeError
  puts "ResponseCodeError - Code: #{$!}"
end

receipt_form = page.form_with(:name => 'aspnetForm')
receipt_form.set_fields(
                        'ctl00$PageContent$StoreNumber' => '4939',
                        'ctl00$PageContent$OperatorNumber' => '00001858',
                        'ctl00$PageContent$TillNumber' => '04',
                        'ctl00$PageContent$TransactionNumber' => '07374',
                        'ctl00$PageContent$ReceiptDateDay' => ' 16',
                        'ctl00$PageContent$ReceiptDateMonth' => '08',
                        'ctl00$PageContent$ReceiptDateYear' => '10',
                        'ctl00$PageContent$ReceiptTimeMinutes' => '57',
                        'ctl00$PageContent$ReceiptTimeSeconds' => '21',
                        'ctl00$PageContent$ReceiptTimeHours' => '10'
                        )

return_page = agent.submit receipt_form

puts "--------------------------------"
puts ""

%w{SecondCell ThirdCell FourthCell FifthCell}.each_with_index do |cell, i|
  return_page.body.match /<td class="#{cell}">([^<]+)<\/td>/
  competitor = $1
  return_page.body.match /<span id="ctl00_SubTitleContent_PriceDiff#{i+1}">([^<]+)<\/span>/
  puts "#{competitor}: #{$1}"
end 

return_page.body.match /<span id="ctl00_PageContent_TotalSavingsCount">([^<]+)<\/span>/
puts ""
puts "ASDA can save you up to: #{$1}!"
puts ""
puts "--------------------------------"