example_lex.yaml

# OrderFlower bot consists of the following
# 1. IAM role used by the bot at runtime
# 2. Inline Bot
# 3. Bot Version
# 4. Alias
Resources:
  # 1. IAM role used by the Amazon Lex service to make runtime calls
  BotRuntimeRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - lexv2.amazonaws.com
            Action:
              - "sts:AssumeRole"
      Path: "/"
      Policies:
        - PolicyName: LexRuntimeRolePolicy
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              - Effect: Allow
                Action:
                  - "polly:SynthesizeSpeech"
                  - "comprehend:DetectSentiment"
                Resource: "*"
 
  # 2. The inline bot definition depends on the IAM role.
  # The bot definition combines all child resources into one CFN resource.
  # This includes Locales, Intents, Slots, SlotTypes.
  OrderFlowersTemplateBot:
    DependsOn: BotRuntimeRole
    Type: AWS::Lex::Bot
    Properties:
      Name: "OrderFlowersWithCFN"
      RoleArn: !GetAtt BotRuntimeRole.Arn
      DataPrivacy:
        ChildDirected: false
      IdleSessionTTLInSeconds: 300
      Description: "How to create a OrderFlowers bot with AWS CloudFormation"
      # We provide a setting that enables you to auto build the locales.
      # Locale builds are also kicked off if you attempt to create a bot version that depends on an unbuilt locale.
      AutoBuildBotLocales: false
      BotLocales:
        - LocaleId: "en_US"
          Description: "Book a trip bot Locale"
          NluConfidenceThreshold: 0.40
          VoiceSettings:
            VoiceId: "Ivy"
          SlotTypes:
            - Name: "FlowerTypes"
              Description: "Slot Type description"
              SlotTypeValues:
                - SampleValue:
                    Value: lilies
                - SampleValue:
                    Value: roses
                - SampleValue:
                    Value: tulips
              ValueSelectionSetting:
                ResolutionStrategy: ORIGINAL_VALUE
          Intents:
            - Name: "OrderFlowers"
              Description: "Intent to order a bouquet of flowers for pick up"
              SampleUtterances:
                - Utterance: "I would like to pick up flowers"
                - Utterance: "I would like to order some flowers"
              IntentConfirmationSetting:
                PromptSpecification:
                  MessageGroupsList:
                    - Message:
                        PlainTextMessage:
                          Value: "Okay, your {FlowerType} will be ready for pickup by {PickupTime} on {PickupDate}.  Does this sound okay?"
                  MaxRetries: 3
                  AllowInterrupt: false
                DeclinationResponse:
                  MessageGroupsList:
                    - Message:
                        PlainTextMessage:
                          Value: "Okay, I will not place your order."
                  AllowInterrupt: false
              Slots:
                - Name: "FlowerType"
                  Description: "something"
                  SlotTypeName: "FlowerTypes"
                  ValueElicitationSetting:
                    SlotConstraint: "Required"
                    PromptSpecification:
                      MessageGroupsList:
                        - Message:
                            PlainTextMessage:
                              Value: "What type of flowers would you like to order?"
                      MaxRetries: 3
                      AllowInterrupt: false
                - Name: "PickUpDate"
                  Description: "something"
                  SlotTypeName: "AMAZON.Date"
                  ValueElicitationSetting:
                    SlotConstraint: "Required"
                    PromptSpecification:
                      MessageGroupsList:
                        - Message:
                            PlainTextMessage:
                              Value: "What day do you want the {FlowerType} to be picked up?"
                      MaxRetries: 3
                      AllowInterrupt: false
                - Name: "PickUpTime"
                  Description: "something"
                  SlotTypeName: "AMAZON.Time"
                  ValueElicitationSetting:
                    SlotConstraint: "Required"
                    PromptSpecification:
                      MessageGroupsList:
                        - Message:
                            PlainTextMessage:
                              Value: "At what time do you want the {FlowerType} to be picked up?"
                      MaxRetries: 3
                      AllowInterrupt: false
            - Name: "FallbackIntent"
              Description: "Default intent when no other intent matches"
              ParentIntentSignature: "AMAZON.FallbackIntent"
 
  # 3. We define a bot version which depends on the DRAFT version of the Amazon Lex Bot.
  OrderFlowersTemplateBotVersionWithCFN:
    DependsOn: OrderFlowersTemplateBot
    Type: AWS::Lex::BotVersion
    Properties:
      BotId: !Ref OrderFlowersTemplateBot
      BotVersionLocaleSpecification:
        - LocaleId: en_US
          BotVersionLocaleDetails:
            SourceBotVersion: DRAFT
      Description: OrderFlowers Version
 
  # 4. We define the alias by providing the bot version created by the AWS::Lex::BotVersion resource above.
  FirstBotAliasWithCFN:
    DependsOn: OrderFlowersTemplateBotVersionWithCFN
    Type: AWS::Lex::BotAlias
    Properties:
      BotId: !Ref OrderFlowersTemplateBot
      BotAliasName: "OrderFlowersVersion1Alias"
      BotVersion: !GetAtt OrderFlowersTemplateBotVersionWithCFN.BotVersion
      SentimentAnalysisSettings:
        DetectSentiment: true