Advanced routing in Symfony v3

Question

I'm after a custom routing method so I can have below links to be handled by single controller action:

/q-query_term
/category-category_name/city-city_name/q-query_term
/city-city_name/category-category_name/q-query_term
/city-city_name/q-query_term
/category-category_name/q-query_term
/city-city_name
/category-category_name

Is it possible even possible? I don't use SensioExtraBundle so routes has to be written down in yaml.

For instance in Zend Framework 2 it is possible quite easily, because I can write a class, which would handle the routing as a wish. Don't know how to achieve the same in Symfony though, any help would be appreciated.

The only way I can come up with is to create a custom route loader, calculate all route permutations and return that collection, but don't know if it the best solution possible.

This question is unique, because I need to use single route name instead of specyfing tens of different route definitions.

Answer 1

A simple solution would be to define the route as catch-all …

# Resources/config/routing.yml

catch_all:
    path:  /{path}
    defaults: { _controller: FooBarBundle:Catchall:dispatcher, path : "" }
    requirements:
        path: ".*"

… and do all further processing in the controller:

# Controller/CatchallController.php

class CatchallController extends Controller
{
    public function dispatcherAction(Request $request, string $path)
    {
        if (/* path matches pattern 1 */)
            return $this->doQuery($request, $path);
        elseif (/* path matches pattern 2 */)
            return $this->doCategoryCityQuery($request, $path);

        // ... and so on

        else
            return new Response("Page not found", 404);
    }

    private function doQuery($request, $path)
    {
        // do stuff and return a Response object
    }

    private function doCategoryCityQuery($request, $path)
    {
        // do stuff and return a Response object
    }
}