Display a notice after a site was cloned to disable/re-enable WP Rocket

[WordPresseur]

Is your feature request related to a problem? Please describe.
Not all users are aware they have to deactivate WP Rocket before a migration/clone and if a user migrate/clone their site with WP Rocket active, it can leads to issues like a non cached/optimized site due to wrong config files.

Deactivate/re-activate WP Rocket allows to recreate the right config files and fixes the issues.

Describe the solution you'd like
Display a notice after a site was cloned to disable/re-enable WP Rocket.

Describe alternatives you've considered
Auto-detect the new domain/site URL and deactivate/re-activate WP Rocket in background.
Woocommerce detects when a new domain/site URL is found and automatically disable functionality like Subscriptions.

Additional context
Ticket: https://secure.helpscout.net/conversation/2114325821/393025/
HS Doc: https://docs.wp-rocket.me/article/705-changing-domains-migrating-sites-with-wp-rocket

[piotrbak]

Should be fixed together with:
#5647
#5549

[CrochetFeve0251]

Identify the root cause

The root issue is that we never check the actual URL.

Scope a solution

A solution would be to develop a section of the code here to detect a change of domain with an action rocket_domain_changed.
And hook a piece of code corresponding to each issue in the corresponding part:

• A clear of the cache inside the cache part.
• A reset of the preload cache table inside the preload part.
• A clear from the config and of advanced-cache.php

For the detecting part we can use an option to save the last url.
If this one dismatch the current URL then we can launch the action rocket_domain_changed that will launch the hooked actions.
To implement that part we will have to create a subscriber inside Engine\Admin in a subfolder DomainChange with the following content:

<?php
namespace WP_Rocket\Engine\Admin\DomainChange;

class Subscriber implements Subscriber_Interface {

  const LAST_BASE_URL_OPTION = 'wp_rocket_last_base_url';

   protected $filesystem;

   public function __construct($filesystem) {
     $this->filesystem = $filesystem;
   }

    public static function get_subscribed_events() {
     return [
     'admin_init'  => 'maybe_launch_domain_changed'
    ];
    }
    
    public function maybe_launch_domain_changed() {
     $base_url = trailingslashit(home_url());
     if(! get_option(self::LAST_BASE_URL_OPTION)) {
         update_option(self::LAST_BASE_URL_OPTION, $base_url);
        return;
      }
     $last_base_url = get_option(self::LAST_BASE_URL_OPTION);
    if($base_url === $last_base_url) {
     return;
    }
    update_option(self::LAST_BASE_URL_OPTION, $last_base_url);
    do_action('rocket_domain_changed');
   }
}

Then for the cache part we will have to add the following hook into the subscriber from the preload:

'rocket_domain_changed' => 'on_permalink_changed'

For the Cache part we can add the following logic to the AdminSubscriber to the events:

'rocket_domain_changed' => 'regenerate_configs'

with the following method:

public function regenerate_configs() {
     rocket_generate_advanced_cache_file();
}

Estimate the effort

Effort S