Given the following multi-message "Dialog", how would you represent this in Javascript or Typescript?

Note: please avoid using any 3rd party libraries in these exercises.

Using your representation from Exercise 1, write a function that takes as parameters a Dialog and a User object and returns the number of messages sent to the user.

func messages_sent_to(user: User, dialog: Dialog) -> number

The User class has the following relevant attributes:

• school_year: a string or enum containing FRESHMAN, SOPHMORE, JUNIOR, SENIOR
• is_transfer: a boolean that's true for transfer students
• current_state: a reference (e.g., pointer, numeric id, etc.) to a specific State object in a Dialog

Assume the user starts off at the upper most state in the Dialog tree.

User = {
  school_year: 'FRESHMAN' | 'SOPHMORE' | 'JUNIOR' | 'SENIOR'
  is_transfer: boolean
  current_state: ref State
}