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OutSystems

Create custom chatbot UI

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  • The OutSystems.AI Chatbot component comes with ChatbotAdvanced block that lets you create a custom user interface, if the pre-built UI in Chatbot Block and cards do not fit your use case.

    The ChatbotAdvanced integrates data structures and actions from the OutSystems.AI Chatbot component, but you need to create local variables, actions, and logic to handle the UI interactions and requests to Azure. Here is an example:

    Advanced UI overview

    The data structures of the variables DLConversation, ChannelAccount, and MessageList (1), with the data types names the same, come from the component. You need the variables (1) to configure the communication with Azure and keep track of the conversation. The MessageReceived and MessageSent local variables (2) are the textual variables bound to the user interface (5, 6), and when they update, the interface updates as well. ChatbotAdvancedInitialize and ChatbotAdvancedMessageReceived (3) are actions that handle the configuration of the Azure connection and the replies from the Azure Bot Service. The ChatbotAdvancedMessageReceived action has the Message input parameter. When the Azure bot service replies with a message, you can show the message or store it in MessageList. Finally, you need an action to send the message to Azure bot service. In this example, the SendMessageToAzure action (4) sends the value of MessageSent to the Azure bot service by using SendMessage action from the component. You trigger the SendMessageToAzure action when you click the button (7) in the user interface.

    Here is a step-by-step example guide to create a custom user interface for a chatbot.

    1. In Service Studio, open the manage dependencies window (Ctrl+Q), search for Chatbot, and add the ChatbotAdvanced Block and SendMessage Action as dependencies.

      Adding chatbot advanced UI reference

    2. Go to Interface > UI Flows > Chatbot > Components and drag the ChatbotAdvanced Block to the Screen. Then, go to the Block properties and enter your secret key in the DirectLineSecret. If you're having difficulties locating the bloc, use the widget three to navigate to Components\ChatbotAdvanced.

      Chatbot block properties

      Direct line secret is a value from the Azure bot service. Check how to get a direct line secret from Azure.

    3. Create two new Screen Actions, one to handle the Initialize event and another to handle the MessageReceive event. Do this by going to the ChatBotAdvanced Block properties, and selecting Events > Handler > New Client Action for both Initialize and MessageReceived. You now have actions ChatbotAdvancedInitialize and ChatbotAdvancedMessageReceived.

    4. Add the following local variables to the Screen:

      • DLConversation of the DLConversation data type.
      • ChannelAccount of the ChannelAccount data type.
      • MessageList of the Message List data type.
      • MessageSent of the text data type.
      • MessageReceived of the text data type.
    5. In the Screen Action handling Initialize, add an Assign tool. Assign DLConversation = Conversation and ChannelAccount = User.

      Initialization set-up

    6. In the ChatbotAdvancedMessageReceived action, use a ListAppend to append the received message (the input parameter Message) to the list of messages. Also, add an Assign tool to the flow and assign MessageReceived = Message.Text, as Message.Text is the latest reply from the chatbot you want to show in the user interface.

    7. Create logic to send the message to the Azure bot service. Start by adding a new Client Action to the Screen. In our example this Client Action is SendMessageToAzure. Then, navigate to Logic > Client Actions > Chatbot and drag the SendMessage Client Action to the flow. In the properties of the SendMessage action, set the values for:

      • ConversationId. Use the ConversationId from previously created local variable DLConversation and assign ConversationId = DLConversation.ConversationId.
      • DirectLineSecret. Use the same value as for the DirectLineSecret in ChatbotAdvanced Block properties.
      • From. Use previously created local variable ChannelAccount.
      • TextMessage. Use previously created local variable MessageSent.

      Azure action configuration

    8. Add the user interface. In our example there are the following elements:

      • A text area field to enter a message that you send to the bot service, with the variable set to MessageSent.
      • A text area field to show the reply, with the variable set to MessageReceived.
      • A button to send the message to the bot service by triggering the SendMessageToAzure action.

      When you run the app with the chatbot logic from this guide, you get:

      Custom chatbot UI running in the browser

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