

In [1]:

    
require 'rest-client'
require 'json'
require 'mongo'

# Datumbox Wrapper.
# Before use it, you must register yourself at Datumbox site
# and get your API Key.
#
# Create an instance of this class calling "Datumbox.create(api_key)".
#
# Author: Pedro Damian Kostelec
# 
# Some of the available methods are:
# (See the API documentation [http://www.datumbox.com/api-sandbox/] for an exhaustive list of methods)
#
# sentiment_analysis(text)
#   Classifies "text" as positive, negative or neutral.
#
# subjective_analysis(text)
#   Categorizes "text" as subjective or objective based on writing style.
#   Texts that express personal opinions are labeled as subjective and the others as objective.
#
# spam_detection(text)
#   Labels documents as spam or nospam by taking into account their context.
#
# adult_content_detection(text)
#   Classifies documents as adult or noadult based on their context.
#
# topic_classification(text)
#   Assigns documents in 12 thematic categories based on ther keywords, idioms and jargon.
#
# language_detection(text)
#   Identifies the natural language of the given text based on its words and context.
#
# twitter_sentiment_analysis(text)
#   Classifies "text" as positive, negative or neutral.
#
# keyword_extraction(text, n)
#   Enables you to extract from an arbitrary document all the keywords and word
#   combinations along with their occurrences in the text.
#
# document_similarity(original, copy)
#   Estimates the degree of similarity between two documents.

class Datumbox

  BASE_URI = 'http://api.datumbox.com/'
  API_VERSION = '1.0'
 
  def initialize(api_key)
    @api_key = api_key
  end

  # Get a Wrapper instance to access the Datumbox service.
  # You must give your API Key once.
  #
  def self.create(api_key)
    Datumbox.new(api_key)
  end

  def request(method, opts)
    options = { api_key: @api_key }.merge opts
    RestClient.post "#{BASE_URI}#{API_VERSION}/#{method}.json", options
  end

  def method_missing(method_id, opts, &block)
    begin
      response = request(method_id.id2name.camelize, opts)
      
      # If the response is successful, and that API method exists
      # and defines the method, for any future calls to be faster
      json = JSON.parse(response)
      self.class.send(:define_method, method_id) do |args|
        request(method_id.id2name.camelize, args)
      end if json['output']['status'] == 1

      return response
    rescue
      super
    end
  end

end

class String
  def camelize
    self.split("_").each {|s| s.capitalize! }.join("")
  end
  def camelize!
    self.replace(self.split("_").each {|s| s.capitalize! }.join(""))
  end
end unless String.new.respond_to?(:camelize)



positive_tweet = "Also, @xDaniielle has understood she can't beat me playing GTA. So instead, she's grabbing a copy too. I have an amazing girlfriend :D"

negative_tweet = "Gah! I hate programming. Been pissing me off all day. Time to go sit on the sofa in a huff with a beer :("



api_key = "cb4d8de407184a58e5b0eab1424ab7d1"
x = Datumbox.create(api_key)









    Out[1]:





#<Datumbox:0x00000002cfb168 @api_key="cb4d8de407184a58e5b0eab1424ab7d1">



In [8]:

    
z = x.twitter_sentiment_analysis(text: negative_tweet)









    Out[8]:





"{\"output\":{\"status\":1,\"result\":\"negative\"}}"