Class: RGinger::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/rginger/parser.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/rginger/parser.rb', line 7

def initialize
end

Instance Method Details

#correct(input) ⇒ Object 



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# File 'lib/rginger/parser.rb', line 10

def correct(input)

  text = input.dup
  results = {"original" => input, "data" => []}

  if !text || text == ""
    results["corrected" => text]
    return results 
  end

  width = text.length
  escaped = URI.escape(text)
  url = "#{API_ENDPOINT}?lang=#{DEFAULT_LANG}&clientVersion=#{API_VERSION}&apiKey=#{API_KEY}&text=#{escaped}"

  json_data = get_json(url)["LightGingerTheTextResult"] rescue {}

  unless json_data.empty?
    new_string = text
    json_data.each do |r|
      if r["Mistakes"].size == r["Suggestions"].size
        r["Mistakes"].each_with_index do |m, i|
          from         = m["From"]
          to           = m["To"]
          reverse_from = -(width - from)
          reverse_to   = -(width - to)
          old_item = new_string[reverse_from .. reverse_to]
          new_item = r["Suggestions"][i]["Text"]
          new_string[reverse_from .. reverse_to] = new_item
          results["data"] << {
            "old"          => old_item, 
            "from"         => from, 
            "to"           => to, 
            "reverse_from" => reverse_from, 
            "reverse_to"   => reverse_to,
            "new"          => new_item,
          }
        end    
      else
        from         = r["From"]
        to           = r["To"]
        reverse_from = -(width - from)
        reverse_to   = -(width - to)
        old_item = new_string[reverse_from .. reverse_to]
        new_item = r["Suggestions"][0]["Text"]
        new_string[reverse_from .. reverse_to] = new_item rescue ""
        results["data"] << {
          "old"          => old_item, 
          "from"         => from, 
          "to"           => to, 
          "reverse_from" => reverse_from, 
          "reverse_to"   => reverse_to,
          "new"          => new_item,
        }
      end
      results["corrected"] = new_string
    end
  end
  results
end

#get_json(location, limit = 10) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/rginger/parser.rb', line 90

def get_json(location, limit = 10)
  raise ArgumentError, 'too many HTTP redirects' if limit == 0
  uri = URI.parse(location)

  begin
    response = Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == 'https') do |http|
      http.open_timeout = 5
      http.read_timeout = 10
      http.get(uri.request_uri)
    end
  
    case response
    when Net::HTTPSuccess
      json = response.body
      JSON.parse(json)
    when Net::HTTPRedirection
      location = response['location']
      warn "redirected to #{location}"
      # Recursive method call
      get_json(location, limit - 1)
    else
      # Error
      throw [uri.to_s, response.value].join(" : ")
    end
  rescue => e
    # Error
    throw [uri.to_s, e.class, e].join(" : ")
  end
end

#rephrase(input) ⇒ Object 



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# File 'lib/rginger/parser.rb', line 70

def rephrase(input)

  text = input.dup
  results = {"original" => input, "alternatives" => []}
  return results if !text || text == ""

  width = text.length
  escaped = URI.escape(text)
  url = "#{REPHRASE_ENDPOINT}?s=#{escaped}"

  json_data = get_json(url)

  unless json_data.empty? || json_data["Sentences"].empty?
    results["alternatives"] = json_data["Sentences"].map{|s| s["Sentence"]}
  end    
  results
end