Class: GTranslator

Inherits:
Object
  • Object
show all
Defined in:
lib/gtranslate-two.rb

Constant Summary collapse

@@key = 
nil

Class Method Summary collapse

Class Method Details

.detect_language(query) ⇒ Object 



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# File 'lib/gtranslate-two.rb', line 19

def self.detect_language(query)
  translate(query, 'en').source
end

.key ⇒ Object 



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# File 'lib/gtranslate-two.rb', line 11

def self.key
  @@key
end

.key=(key) ⇒ Object 



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# File 'lib/gtranslate-two.rb', line 15

def self.key=(key)
  @@key = key
end

.translate(query, target, source = nil) ⇒ Object 



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# File 'lib/gtranslate-two.rb', line 23

def self.translate(query, target, source=nil)
  
  # Step 1a: make an array of required parameters to send to the Google Translate server
  options = { :q => query, :target => target, :key => @@key } 
  
  # Step 1b: Add the optional source parameter if it has been explicitly specified
  options[:source] = source if source
  
  # Step 1c: Serialize the hash for the POST request
  params = URI.escape(options.collect{|k,v| "#{k}=#{v}"}.join('&'))
  
  # Step 2a: Get the Google Translate host address
  uri = URI.parse('https://www.googleapis.com/language/translate/v2')
  
  # Step 2b: Create a new HTTP client from the provided host address
  http = Net::HTTP.new(uri.host, uri.port)
  
  # Step 2c: Force the HTTP client to use SSL and assign a proper certificate
  http.use_ssl = true
  http.ssl_timeout = 2
  http.verify_mode = OpenSSL::SSL::VERIFY_PEER
  store = OpenSSL::X509::Store.new
  store.set_default_paths
  http.cert_store = store
  
  # Step 2d: Make an actual POST request and grab the response and it's body
  response, body = http.post(uri.path, params, { 'X-HTTP-Method-Override' => 'GET' })
  
  # Step 3a: If the response indicates an HTTP OK code (200), parse the body as JSON
  if response.is_a?(Net::HTTPOK)
    # Step 3b: The JSON response has 1 or more 'translations' - out of each one...
    result = JSON.parse(body)['data']['translations'].collect do |params|
      #... create a new GTranslatorResult object
      GTranslatorResult.new(query, target, params, source)
    end
    # Step 4a: If all went well, return the resulting GTranslatorResult or an array of those 
    #          if more than one translation has been returned
    return result.size == 1 ? result.first : result
  else
    # Step 4b: Otherwise, return the error response (generally, a Net::HTTPBadRequest)
    response
  end
end