Detect page change in middleware

[Rocinante89]

Hey! So i'm trying to write a middleware to create and store an idempotency token. The requirements are to generate a new token on each page change & also if our external api throws an error.

My plan is this:

1. Create a middleware that will be responsible for creating the token, storing it in a cookie, updating the cookie with a new token on each page change.
2. Expose a method to generate a new token & store it in a cookie. This will be used if our external api throws an error

My question is, how do I detect a page change? using middleware?