AddressController.php

<?php

Class AddressController 
{
    public function index(Request $request)
    {
        $user = Auth::user();
        $addresses = Address::where("user_id", $user->id)->get();
        
        return (new AddressResponder($request, $addresses))->respond();
    }
    
    // ...   
}

AddressResponder.php

<?php

class AddressResponder
{
    protected $request;
    
    protected $addresses;
    
    public function __construct(Request $request, Collection $addresses)
    {
        $this->request = $request;
        $this->addresses = $addresses;
    }
  
    public function respond()
    {
        return $request->expectsJson()
            ? $this->json()
            : $this->html();
    }
  
    protected function html()
    {
        $supportedLocations = AddressController::getSupportedLocations();
            
        return view("addresses.index", [
            "addresses" => $this->addresses,
            "supported_locations" => $supportedLocations,
        ]);
    }
  
    protected function json()
    {
        return ResponseJson::make($this->addresses)
    }
}