Reflective Hooks

Reflection allows dynamic inspection and manipulation of classes and objects on runtime.

WCE makes use of reflection for all hooks by default.

This opens up endless possibilities, enabling you to define any complex business logic, use any other libraries, connect to db etc

Learn more about Java Reflection

Learn more about Python Reflection

Consider the template below and the corresponding hooks.

Template

JAWCE

6005:
  type: text
  template: "com.example.ExampleReflectionHook:getOrderInfo"
  message: "Provide reference for order: {{ type }}, {{ currency }} {{ amount }}"
  routes:
    "re:\\d+": 6006

PYWCE

"PROMPT-ORDER-STAGE":
  type: button
  on-receive: "example.engine_chatbot.hooks.order_service.manage_order"
  checkpoint: true
  message:
    title: Order
    body: "Confirm the above order. Would you like to save order?"
    footer: pywce
    buttons:
      - Save
      - Cancel
  routes:
    "save": "CHECKOUT-STAGE"
    "cancel": "PREVIOUS-STAGE"

Hook business logic

Business Logic

# example.engine_chatbot.hooks.order_service.py

from pywce import HookArg

def manage_order(arg: HookArg) -> HookArg:
  """
  if user answers yes, save user order in session to db
  """
  print(f"Received hook arg: {arg}")

  if arg.user_input.lower() == "yes":
    saved_order_id = arg.session_manager.get(
        session_id=arg.user.wa_id,
        key="order_id"
    )

    # TODO: implement business logic for saving user order

    return arg

  // com.example.ExampleReflectionHook.java

  @Sl4j
  public class ExampleReflectionHook {
    private final HookArgs args;

    public ExampleReflectionHook(HookArgs args) {
      this.args = args;
    }

    public Object getOrderInfo() {
      log.info("Received hook args: {}", this.args);

      // populate dynamic variables
      args.setTemplateDynamicBody(
          new TemplateDynamicBody(
              null,
              null,
              Map.of(
                  "type", "Gaming Chair",
                  "currency", "USD",
                  "amount", 3.50
                )
            ));

      return args;
    }
  }

Getting Started

Templates

Hooks

Miscellaneous

Reflective Hooks

Template

JAWCE

PYWCE

Hook business logic

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