JP Amazon Associate

amazon.rb

# amazon.rb - amazon affiliate links for jekyll
# assumes that you have a configuration variable called 'amazon_associate_id' with your associate id
 
# usage: {{ asin | amazon_product_href }} 
# returns url of a product
 
# usage: {{ asin | amazon_image_href: 'M' }}
# returns image of the product, size argument can be S, M, or L, default M
 
# usage: {{ asin | amazon_product: 'A Product' }}
# returns an html link to a product
 
# usage: {{ asin | amazon_image: 'M' }}
# returns an html link and IMG of the product
 
module Jekyll
  module Filters
    def amazon_product_href(asin)
      "http://www.amazon.co.jp/gp/product/#{asin}/ref=as_li_ss_il?ie=UTF8&creativeASIN=#{asin}&tag=#{@context.registers[:site].config['amazon_associate_id']}"
    end
 
    def amazon_image_href(asin, size)
      "http://ws-fe.amazon-adsystem.com/widgets/q?_encoding=UTF8&ASIN=#{asin}&Format=_#{size ? size : 'M'}L110_&ID=AsinImage&MarketPlace=JP&ServiceVersion=20070822&WS=1&tag=#{@context.registers[:site].config['amazon_associate_id']}"
    end
 
    def amazon_product(asin, text)
      asin ? "<a href=\"#{amazon_product_href(asin)}\">#{text}</a>" : text
      
    end
 
    def amazon_image(asin, size)
      "<a href=\"#{amazon_product_href(asin)}\" target=\"_blank\"><img src=\"#{amazon_image_href(asin, size)}\" /></a>"
    end
 
  end
end