module AlexaRubykit

# File lib/alexa_rubykit/request.rb, line 25
def self.build_request(json_request)
  raise ArgumentError, 'Invalid Alexa Request.' unless AlexaRubykit.valid_alexa?(json_request)
  @request = nil
  case json_request['request']['type']
    when /Launch/
      @request = LaunchRequest.new(json_request)
    when /Intent/
      @request = IntentRequest.new(json_request)
    when /SessionEnded/
      @request = SessionEndedRequest.new(json_request)
    else
      raise ArgumentError, 'Invalid Request Type.'
  end
  @request
end

# File lib/alexa_rubykit.rb, line 10
def self.print_json(json)
  p json
end

# File lib/alexa_rubykit.rb, line 15
def self.print_version
  p AlexaRubykit::VERSION
end

# File lib/alexa_rubykit/request.rb, line 42
def self.transform_keys_to_symbols(value)
  return value if not value.is_a?(Hash)
  hash = value.inject({}){|memo,(k,v)| memo[k.to_sym] = self.transform_keys_to_symbols(v); memo}
  return hash
end

# File lib/alexa_rubykit.rb, line 20
def self.valid_alexa?(request_json)
  !request_json.nil? && !request_json['session'].nil? &&
      !request_json['version'].nil? && !request_json['request'].nil?
end