Possible router driver api

app.js

//...imports...

// Declare routes and their associated action
// route:action
const routeDeclaration = {
  '/users': {
    '/' : 123,
    ':userId': 456
    ':userId/profile': 789
  }
};

function intent({Router}) {

 /*
 Router is an observable with the current location.
 */

 /* Navigate to /users/123*/
 let routeHandler$ = Router.map(location => {
   let {path, value} = switchPath(location, routeDeclaration);
   return {
     path, value
    }
  }
);

  //...finish creating intent...
}

function model(actions) {
  //...creating state...
}

function view(state) {
  //...creating view...
}

function main(responses) {

  let actions = intent(responses);
  let state = model(actions);
  let view$ = view(state);

  /*
   url$ is an observable which holds the current URL
   you would like to the router driver to *Set*
  */
  let url$ = state.url$

  /*
  url$.map(url => {
    // url === '/user/123'
  })
  */

 return {
   // The router would filter the stream and if it is an object it is a declaration
   // If it is a string, this is the route to set.
   Router: url$
   //...other drivers...
 }

}

let drivers = {
  /*
  makeRouterDriver() would take options for the router to handle.
  */
  Router: makeRouterDriver({
    /*
    The default to hashBang will be false
    Fallback to hashBang mode is determined by browser support
    Can be set to true and alway be enabled
    */
    hashBang: true,
    /*
    The router can be set to run from a prefix, so it can update the addressbar properly.
    In this case the router is running on the '/home' prefix of your site like this
    www.example.com/home/#!/user/123
    */
    prefix: '/home'
  })
}

run(main, drivers);