alexa_generator

Rubygem to generate the interaction model for Amazon's Alexa API.

Installing

alexa_generator is available on Rubygems. You can install it with:

$ gem install alexa_generator

You can also add it to your Gemfile:

gem 'alexa_generator'

What's this?

To register a skill with Amazon's Alexa API, one must create an intent schema and a list of sample utterances. I found this process to be really tedious, and wanted an easier and more maintainable way to define interaction models.

Example usage

Here's an example of building the intent schema used in Amazon's example:

model = AlexaGenerator::InteractionModel.build do |model|
  model.add_intent(:GetHoroscope) do |intent|
    intent.add_slot(:Sign, AlexaGenerator::Slot::SlotType::LITERAL) do |slot|
      slot.add_bindings(*%w{Aries Taurus Gemini Cancer Leo Virgo Libra Scorpio Sagittarius Capricorn Aquarius Pisces})
    end

    intent.add_slot(:Date, AlexaGenerator::Slot::SlotType::DATE) do |slot|
      slot.add_bindings('today', 'next Thursday', 'tomorrow')
    end

    intent.add_utterance_template('what is the horoscope for {Sign}')
    intent.add_utterance_template('what will the horoscope for {Sign} be {Date}')
  end
end

Intent schema

One can then get the intent schema:

model.intent_schema
# => {:intents=>[{:intent=>:GetHoroscope, :slots=>[{:name=>:Sign, :type=>:LITERAL}, {:name=>:Date, :type=>:DATE}]}]}

Amazon expects JSON as input, so you might want to convert:

require 'json'
JSON.pretty_generate(model.intent_schema)
# => {
# =>   "intents": [
# =>     {
# =>       "intent": "GetHoroscope",
# =>       "slots": [
# =>         {
# =>           "name": "Sign",
# =>           "type": "LITERAL"
# =>         },
# =>         {
# =>           "name": "Date",
# =>           "type": "DATE"
# =>         }
# =>       ]
# =>     }
# =>   ]
# => }

Sample utterances

alexa_generator generates all possible combinations of slot bindings and applies them to the provided sample utterance templates. In the above example:

model.sample_utterances(:GetHoroscope)

will output the following (clipped for the sake of brevity):

GetHoroscope what is the horoscope for {Aquarius|Sign}
GetHoroscope what is the horoscope for {Aries|Sign}
GetHoroscope what is the horoscope for {Cancer|Sign}
GetHoroscope what is the horoscope for {Capricorn|Sign}
GetHoroscope what is the horoscope for {Gemini|Sign}
GetHoroscope what is the horoscope for {Leo|Sign}
GetHoroscope what is the horoscope for {Libra|Sign}
GetHoroscope what is the horoscope for {Pisces|Sign}
GetHoroscope what is the horoscope for {Sagittarius|Sign}
GetHoroscope what is the horoscope for {Scorpio|Sign}
GetHoroscope what is the horoscope for {Taurus|Sign}
GetHoroscope what is the horoscope for {Virgo|Sign}
GetHoroscope what will the horoscope for {Aquarius|Sign} be {next Thursday|Date}
GetHoroscope what will the horoscope for {Aquarius|Sign} be {today|Date}
GetHoroscope what will the horoscope for {Aquarius|Sign} be {tomorrow|Date}
[... clipped ...]
GetHoroscope what will the horoscope for {Taurus|Sign} be {next Thursday|Date}
GetHoroscope what will the horoscope for {Taurus|Sign} be {today|Date}
GetHoroscope what will the horoscope for {Taurus|Sign} be {tomorrow|Date}
GetHoroscope what will the horoscope for {Virgo|Sign} be {next Thursday|Date}
GetHoroscope what will the horoscope for {Virgo|Sign} be {today|Date}
GetHoroscope what will the horoscope for {Virgo|Sign} be {tomorrow|Date}

Running tests

Run the tests by issuing:

bundle exec rake

ihassin / alexa_generator