Class: Kogno::Nlp

Inherits:
Object
  • Object
show all
Defined in:
lib/core/lib/nlp.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(phrase = nil, locale = :en, context_reference = nil) ⇒ Nlp

Returns a new instance of Nlp.



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# File 'lib/core/lib/nlp.rb', line 7

def initialize(phrase=nil,locale=:en, context_reference=nil)
  self.wit = Wit.new(access_token: Nlp.get_wit_token(locale), api_version: Kogno::Application.config.nlp.wit[:api_version])
  self.processed = false
  self.phrase = phrase
  self.context_reference = context_reference
  self.entities = {}
end

Instance Attribute Details

#context_reference ⇒ Object

Returns the value of attribute context_reference.



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# File 'lib/core/lib/nlp.rb', line 5

def context_reference
  @context_reference
end

#entities ⇒ Object

Returns the value of attribute entities.



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# File 'lib/core/lib/nlp.rb', line 5

def entities
  @entities
end

#intents ⇒ Object

Returns the value of attribute intents.



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# File 'lib/core/lib/nlp.rb', line 5

def intents
  @intents
end

#phrase ⇒ Object

Returns the value of attribute phrase.



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# File 'lib/core/lib/nlp.rb', line 5

def phrase
  @phrase
end

#processed ⇒ Object

Returns the value of attribute processed.



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# File 'lib/core/lib/nlp.rb', line 5

def processed
  @processed
end

#traits ⇒ Object

Returns the value of attribute traits.



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# File 'lib/core/lib/nlp.rb', line 5

def traits
  @traits
end

#wit ⇒ Object

Returns the value of attribute wit.



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# File 'lib/core/lib/nlp.rb', line 5

def wit
  @wit
end

Class Method Details

.get_wit_token(locale) ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 15

def self.get_wit_token(locale)
  tokens = Kogno::Application.config.nlp.wit[:apps]
  if !locale.nil? and !tokens[locale.to_sym].nil?
    return tokens[locale.to_sym]
  else # Hash      
    return tokens[:default]
  end
end

.most_confidence(elements) ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 177

def self.most_confidence(elements)
  if elements.class == Array
    return elements.sort_by{|element| element["confidence"]}.first
  else
    return false
  end
end

Instance Method Details

#add_pre_processed_entities ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 185

def add_pre_processed_entities    
  self.entities[:datetime_range] = self.datetime_range if self.datetime_range?
  self.entities[:datetime] = self.entities[:"wit$datetime:datetime"].map{|v| v[:value] || v[:from][:value] rescue nil} unless self.entities[:"wit$datetime:datetime"].nil?
end

#dates ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 116

def dates
  self.entities[:datetime].map{|d| d[:values][0][:value].to_date} rescue []
end

#datetime_range ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 120

def datetime_range

  params = self.entities[:"wit$datetime:datetime"] rescue []

  dates = {
    :from => nil,
    :to => nil
  }

  # case (params.count rescue 0)
  count = params.count rescue 0

  # when 1
  if count == 1
    if params[0][:value].nil?
      dates[:from] = (params[0][:values][0][:from][:value].to_date rescue nil)
      dates[:to] = (params[0][:values][0][:to][:value].to_date rescue nil)
      dates[:to] = dates[:to] - 1.day unless dates[:to].nil? #esto es por que el git al traer rango trae un dia mas
    else
      dates[:from] = (params[0][:value].to_date rescue nil)
      unless self.entities[:duration].nil?
        dates[:to] = get_return_date_from_duration(dates[:from]) unless dates[:from].nil?
      end
    end
    # when 2
  elsif count > 1
    dates[:from] = (params[0][:value].to_date rescue nil)
    dates[:to] = (params[1][:value].to_date rescue nil)
  end

  if ((dates[:from] > dates[:to]) rescue false) #solo para asegurar que la fecha de salida sea anterior a la de llegada
    from_tmp = dates[:from]
    dates[:from] = dates[:to]
    dates[:to] = from_tmp
  end

  return (dates)
end

#datetime_range? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/core/lib/nlp.rb', line 159

def datetime_range?
  datetime_range = self.datetime_range
  !datetime_range[:from].nil? && !datetime_range[:to].nil?
end

#duration_in_days ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 165

def duration_in_days

  multiplier = {"day"=>1,"week"=>7,"month"=>31}
  duration = (self.entities[:duration][0] rescue nil)
  unless duration.nil?
    return(duration[:value]*multiplier[duration[:unit]] rescue 0)
  else
    return nil
  end

end

#empty_entities? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/core/lib/nlp.rb', line 76

def empty_entities?
  self.processed and self.entities.empty?
end

#expression ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 99

def expression
  self.entities[:expression].first[:value] rescue nil
end

#intent(name_only = true) ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 80

def intent(name_only=true)
  final_intent = nil
  intents = (self.intents rescue nil)
  unless intents.nil?
    intents.each do |intent|
      if final_intent.nil?
        final_intent = intent
      elsif intent[:confidence] > final_intent[:confidence]
        final_intent = intent
      end
    end
  end
  if final_intent.nil?
    return nil
  else
    return name_only ? final_intent[:name] : final_intent
  end
end

#local_search_query ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 111

def local_search_query
  self.entities[:local_search_query] rescue nil
end

#location ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 103

def location
  self.entities[:location] rescue []
end

#process_phrase(phrase = nil, context_reference = nil) ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 28

def process_phrase(phrase=nil, context_reference=nil)
  if !Kogno::Application.config.nlp.wit[:enable]
    logger.write "NLP Service is not enabled in config/initializers/nlp.rb", :red
    return false
  end

  wit_tries = 0

  phrase = phrase.nil? ? self.phrase : phrase
  context_reference = context_reference.nil? ? self.context_reference : context_reference

  self.processed = true
  if phrase.nil? or phrase.empty?
    {}
  elsif phrase.length > 256
    {}  
  else

    phrase = Spelling::correction(phrase)
    # logger.write "-----", :red
    # logger.write phrase, :red

    wit_output = nil
    loop do
      wit_output = self.wit.message_with_context(phrase, context_reference) rescue :error
      break if wit_output != :error || wit_tries == 3
      logger.debug "Wit error!!!", :red
      wit_tries+=1
      sleep(1)
    end

    self.intents = wit_output["intents"].deep_symbolize_keys! rescue {}
    self.entities = wit_output["entities"].deep_symbolize_keys! rescue {}
    self.traits = wit_output["traits"].deep_symbolize_keys! rescue {}

    logger.debug "  NLP RESOLVED VALUES => #{wit_output}", :light_blue

    self.add_pre_processed_entities()
  end

end

#process_phrase_once ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 70

def process_phrase_once
  unless self.processed
    self.process_phrase
  end
end

#search_query ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 107

def search_query
  self.entities[:search_query] rescue nil
end

#set_context_reference(context_reference) ⇒ Object 



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# File 'lib/core/lib/nlp.rb', line 24

def set_context_reference(context_reference)
  self.context_reference = context_reference
end