class ShareCounter

Public Class Methods

all(url) click to toggle source

# File lib/share-counter.rb, line 68
def self.all url
  supported_networks.inject({}) { |r, c| r[c.to_sym] = ShareCounter.send(c, url); r }
end

delicious(url) click to toggle source

# File lib/share-counter.rb, line 43
def self.delicious url
  url_digest = Digest::MD5.hexdigest(url)
  html = make_request "https://avosapi.delicious.com/api/v1/posts/md5/#{url_digest}"
  JSON.parse(html)["pkg"][0]["num_saves"].to_i rescue 0
end

facebook(url) click to toggle source

# File lib/share-counter.rb, line 27
def self.facebook url
  html = make_request "https://api.facebook.com/method/fql.query", format: "json", query: "select commentsbox_count, click_count, total_count, comment_count, like_count, share_count from link_stat where url=\"#{url}\""
  return JSON.parse(html, symbolize_names: true)[0]
end

googleplus(url) click to toggle source

# File lib/share-counter.rb, line 38
def self.googleplus url
  html = make_request "https://plusone.google.com/_/+1/fastbutton", url: url
  return Nokogiri::HTML.parse(html).xpath('//*[@id="aggregateCount"]').text.to_i
end

linkedin(url) click to toggle source

# File lib/share-counter.rb, line 33
def self.linkedin url
  html = make_request "http://www.linkedin.com/countserv/count/share", url: url, callback: "IN.Tags.Share.handleCount"
  return JSON.parse(html)['count']
end

pinterest(url) click to toggle source

# File lib/share-counter.rb, line 54
def self.pinterest url
  html = make_request "http://widgets.pinterest.com/v1/urls/count.json", url: url, source: 6
  html.gsub! 'receiveCount(', ''
  html.gsub! ')', ''
  return JSON.parse(html)['count']
end

reddit(url) click to toggle source

network lookups

# File lib/share-counter.rb, line 11
def self.reddit url
  html = make_request "http://www.reddit.com/api/info.json", url: url
  j = JSON.parse(html)

  unless j['data']['children'].empty?
    return j['data']['children'][0]['data']['score']
  else
    return 0
  end
end

selected(url, selections) click to toggle source

# File lib/share-counter.rb, line 72
def self.selected url, selections
  selections.map{|name| name.downcase}.select{|name| supported_networks.include? name.to_s}.inject({}) {
     |r, c| r[c.to_sym] = ShareCounter.send(c, url); r }
end

stumbleupon(url) click to toggle source

# File lib/share-counter.rb, line 49
def self.stumbleupon url
  html = make_request "http://www.stumbleupon.com/services/1.01/badge.getinfo", url: url
  return JSON.parse(html)['result']['views']
end

supported_networks() click to toggle source

helpers - get all or selected networks

# File lib/share-counter.rb, line 64
def self.supported_networks
  %w(reddit twitter facebook linkedin googleplus delicious stumbleupon pinterest)
end

twitter(url) click to toggle source

# File lib/share-counter.rb, line 22
def self.twitter url
  html = make_request "http://urls.api.twitter.com/1/urls/count.json",  url: url
  return JSON.parse(html)['count']
end

Private Class Methods

make_request(*args) click to toggle source

Performs an HTTP request to the given API URL with the specified params and within 2 seconds, and max 3 attempts

If a :callback param is also specified, then it is assumed that the API returns a JSON text wrapped in a call to a method by that callback name, therefore in this case it manipulates the response to extract only the JSON data required.

# File lib/share-counter.rb, line 88
def self.make_request *args
  result   = nil
  attempts = 1
  url      = args.shift
  params   = args.inject({}) { |r, c| r.merge! c }

  begin
    response    = RestClient.get url,  { :params => params, :timeout => 5 }

    # if a callback is specified, the expected response is in the format "callback_name(JSON data)";
    # with the response ending with ";" and, in some cases, "\n"
    #Strip off the preceeding /**/
    result = params.keys.include?(:callback) \
      ? response.gsub(/\A\/\*\*\/\s+/, "").gsub(/^(.*);+\n*$/, "\\1").gsub(/^#{params[:callback]}\((.*)\)$/, "\\1") \
      : response

  rescue => e
    puts "Failed #{attempts} attempt(s) - #{e}"
    attempts += 1
    if attempts <= 3
      sleep 2
      retry
    else
      raise e
    end
  end

  result
end