Class: ShoppingSource

Inherits:
Source
  • Object
show all
Defined in:
lib/sources/shopping_source.rb

Constant Summary

Constants inherited from Source

Source::SIMPLE_SOURCES_YAML_FILE

Instance Attribute Summary

Attributes inherited from Source

#batch_fetch_delay, #cpc, #for_product_info, #for_review_aggregates, #homepage, #mappable, #name, #offer_affiliate, #offer_enabled, #offer_ttl_seconds, #product_code_examples, #product_code_regexp, #product_page_link_erb, #search_token_separator, #search_url, #supports_lifetime_ratings, #use_for_merchant_ratings

Instance Method Summary collapse

Methods inherited from Source

affiliate_sources, #code_from_merchant_source_page_url, #eql?, #hash, inherited, #keyname, keyname, keyname=, merchant_rating_sources, method_missing, offer_sources, #product_code_valid?, #product_page_link, source, sources, #to_s, #url_for_merchant_source_page_alt

Constructor Details

#initialize ⇒ ShoppingSource

Returns a new instance of ShoppingSource.



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# File 'lib/sources/shopping_source.rb', line 5

def initialize
  super(:name => 'Shopping.com',
        :homepage => 'http://www.shopping.com/',
        :cpc => 50,
        :offer_enabled => true,
        :offer_ttl_seconds => 1800,
        :use_for_merchant_ratings => true,
        :offer_affiliate => false,
        :supports_lifetime_ratings => false,
        :batch_fetch_delay => 2,
        :product_code_regexp => /^\d{4,10}$/,
        :product_code_examples => ['44393573', '37469715'])
end

Instance Method Details

#api ⇒ Object 



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# File 'lib/sources/shopping_source.rb', line 19

def api
  @api ||= Shopping::Publisher.new
end

#fetch_merchant_source(merchant_source_page_url) ⇒ Object 



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# File 'lib/sources/shopping_source.rb', line 27

def fetch_merchant_source(merchant_source_page_url)
  delay_fetch
  doc = nil
  4.times do |i|
    # This is a workaround for some weirdness with Shopping.com.
    # About one in ten requests for a merchant's info page results
    # in a page with zeros for everything (as if the merchant has
    # never been reviewed).  One indication that we received the
    # bogus page is the the title will look like:
    # Shopping.com: null - Compare Prices & Read Reviews
    # If we see that 'null' in the title, try fetching the page
    # again (up to 4 times).
    doc = Hpricot(open(merchant_source_page_url))
    page_title = doc.at('head/title').inner_text
    break if page_title.match(/ null /).nil?
  end

  merchant_source = OpenStruct.new
  merchant_source.source = self

  # merchant name
  element = doc.at('h1[@class = "pageTitle"]')
  unless element.nil?
    name = element.inner_text.strip
    merchant_source.name = name
  end

  # merchant logo
  element = doc.at('img[@class = "logoBorder1"]')
  unless element.nil?
    logo_url = element.attributes['src']
    merchant_source.logo_url = logo_url

    # merchant code
    code = logo_url.match(/merch_logos\/(.+)\.gif/)[1]
    merchant_source.code = code
  end

  # merchant rating
  element = doc.at('td[@id = "image"]/img')
  unless element.nil?
    merchant_rating = element.attributes['title'].match(/((\d|,)*\.?\d)/)[1]
    merchant_source.merchant_rating = merchant_rating.delete(',').to_f * 20.0 unless merchant_rating.nil?
  end

  # Num Merchant Reviews
  element = doc.at('table[@class = "boxTableTop"]//h3[@class = "boxTitleNB"]')
  unless element.nil?
    num_merchant_reviews = element.inner_text.match(/of\s+((\d|,)+)/)[1]
    merchant_source.num_merchant_reviews = num_merchant_reviews.delete(',').to_i unless num_merchant_reviews.nil?|| num_merchant_reviews.empty?
  end

  merchant_source
end

#fetch_offers(product_code) ⇒ Object 



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# File 'lib/sources/shopping_source.rb', line 133

def fetch_offers(product_code)
  api.fetch_offers(product_code)
end

#fetch_street_price(product_code) ⇒ Object 



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# File 'lib/sources/shopping_source.rb', line 116

def fetch_street_price(product_code)
  delay_fetch
  offers = fetch_offers(product_code)
  num_offers = 0
  total_prices = 0.0
  offers.each do |offer|
    if !offer.merchant_rating.nil? &&
       offer.merchant_rating >= 55 &&
       !offer.price.nil? &&
       !offer.shipping.nil?
      total_prices += offer.total_price
      num_offers += 1
    end
  end
  num_offers.zero? ? nil : (total_prices / num_offers)
end

#format_rating(merchant_source) ⇒ Object 



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# File 'lib/sources/shopping_source.rb', line 108

def format_rating(merchant_source)
  '%01.1f/5.0' % (merchant_source.get_merchant_rating.to_f / 20.0)
end

#nullify_offer_url(offer_url) ⇒ Object 



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# File 'lib/sources/shopping_source.rb', line 112

def nullify_offer_url(offer_url)
  offer_url.gsub(/3068547/, '8039098')
end

#search_for_merchant_source(search_text) ⇒ Object 



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# File 'lib/sources/shopping_source.rb', line 82

def search_for_merchant_source(search_text)
  merchant_search_url = "http://www.shopping.com/xSD-#{CGI::escape(search_text.strip)}"
  doc = Hpricot(open(merchant_search_url))
  merchant_sources = []
  element = doc.search('div[@class*="contentContainer"]/div[@class="boxMid"]')[1]

  # Do we have any results?
  unless element.nil?
    element.search('tr[td/div/ul/li/a/span[text() = "See Store Info"]]').each do |result_row|
      element = result_row.at('/td/a')
      name = element.inner_text.strip
      merchant_code = element.attributes['href'].match(/~MRD-(\d+)/)[1]
      element = result_row.at('/td[@class = "smallTxt"]/img')
      logo_url = element.attributes['src'] unless element.nil?

      existing_merchant_source = MerchantSource.find_by_source_and_code(self, merchant_code)
      if existing_merchant_source.nil?
        merchant_sources << OpenStruct.new({:source => self, :name => name, :code => merchant_code, :logo_url => logo_url})
      else
        merchant_sources << existing_merchant_source
      end
    end
  end
  merchant_sources
end

#url_for_merchant_source_page(merchant_source_code) ⇒ Object 



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# File 'lib/sources/shopping_source.rb', line 23

def url_for_merchant_source_page(merchant_source_code)
  "http://www.shopping.com/xMR-~MRD-#{merchant_source_code}"
end