Push a thought. How to filter by cities in a post?

Question

PHP

There is a website with companies, each company has branches that can be in different cities. Tell me how to implement a filter by city?
What are the main problems:
- the filter should not be in the category of companies, but on the page of each company in the form of links to cities prntscr.com/gy1fsi
- after selecting a city, a new page opens with branches only in this city
example of a link to a company - /company/ 123/
link example after filtering
/company/123/moscow/
/company/123/samara/
or numeric options
/company/123/city/1/
/company/123/city/54/
Where to start? What features to use? Maybe someone came across similar solutions / plugins? I would appreciate any help, thanks!

Answer 1

From the url you get "moscow", and in the selection of branches you look for those branches that are tied to "moscow"
PS
As an option for displaying branches: xn--80aaej4awmhc4b2g.xn--p1ai/catalog/8664#filial