Added logic to clean root files

inc/ThirdParty/Plugins/I18n/WPML.php

@@ -3,6 +3,7 @@
 namespace WP_Rocket\ThirdParty\Plugins\I18n;
 
 use WP_Rocket\Event_Management\Subscriber_Interface;
+use WP_Rocket\Tests\Fixtures\WP_Filesystem_Direct;
 use WP_Rocket\ThirdParty\ReturnTypesTrait;
 
 /**
@@ -11,6 +12,23 @@
 class WPML implements Subscriber_Interface {
 	use ReturnTypesTrait;
 
+	/**
+	 * Filesystem instance.
+	 *
+	 * @var WP_Filesystem_Direct
+	 */
+	protected $filesystem;
+
+	/**
+	 * Instantiate class.
+	 *
+	 * @param WP_Filesystem_Direct $filesystem Filesystem instance.
+	 */
+	public function __construct( WP_Filesystem_Direct $filesystem = null ) {
+		$this->filesystem = $filesystem ?: rocket_direct_filesystem();
+	}
+
+
 	/**
 	 * Events for subscriber to listen to.
 	 *
@@ -25,6 +43,8 @@ public static function get_subscribed_events() {
 			'rocket_rucss_is_home_url'                => [ 'is_secondary_home', 10, 2 ],
 			'rocket_preload_all_to_pending_condition' => 'clean_only_right_domain',
 			'rocket_preload_sitemap_before_queue'     => 'add_languages_sitemaps',
+			'after_rocket_clean_home'                 => 'remove_root_cached_files',
+			'after_rocket_clean_domain'               => 'remove_root_cached_files',
 		];
 
 		return $events;
@@ -100,4 +120,22 @@ public function add_languages_sitemaps( $sitemaps ) {
 		}
 		return array_unique( $new_sitemaps );
 	}
+
+	/**
+	 * Remove root files when WPML is active.
+	 *
+	 * @return void
+	 */
+	public function remove_root_cached_files() {
+		$site_url               = home_url();
+		$host_name              = wp_parse_url( $site_url, PHP_URL_HOST );
+		$cache_folder_path      = _rocket_get_wp_rocket_cache_path() . $host_name . '/';
+		$cache_folder_directory = $this->filesystem->dirlist( $cache_folder_path );
+		foreach ( array_keys( $cache_folder_directory ) as $entry ) {
+			if ( $this->filesystem->is_dir( $cache_folder_path . $entry ) ) {
+				continue;
+			}
+			$this->filesystem->delete( $cache_folder_path . $entry );
+		}
+	}
 }

tests/Fixtures/inc/ThirdParty/Plugins/I18n/WPML/removeRootCachedFiles.php

@@ -0,0 +1,15 @@
+<?php
+return [
+	'removeFilesOnRoot' => [
+		'config' => [
+			'home_url' => 'https/example.org',
+			'host' => 'example.org',
+			'entries' => [
+				'entry_path' => []
+			],
+			'path' => 'path',
+			'cache_path' => 'pathexample.org/',
+			'entry_path' => 'pathexample.org/entry_path',
+		],
+	],
+];

tests/Unit/inc/ThirdParty/Plugins/I18n/WPML/removeRootCachedFiles.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace WP_Rocket\Tests\Unit\inc\ThirdParty\Plugins\I18n\WPML;
+
+use Mockery;
+use WP_Rocket\Tests\Fixtures\WP_Filesystem_Direct;
+use WP_Rocket\Tests\Unit\TestCase;
+use WP_Rocket\ThirdParty\Plugins\I18n\WPML;
+use Brain\Monkey\Functions;
+class Test_RemoveRootCachedFiles extends TestCase
+{
+	protected $subscriber;
+	protected $filesystem;
+
+	protected function set_up()
+	{
+		parent::set_up();
+		$this->filesystem = Mockery::mock( WP_Filesystem_Direct::class );
+		$this->subscriber = new WPML($this->filesystem);
+	}
+
+	/**
+	 * @dataProvider configTestData
+	 */
+	public function testShouldAsExpected( $config ) {
+		Functions\expect('home_url')->andReturn($config['home_url']);
+		Functions\expect('wp_parse_url')->with($config['home_url'], PHP_URL_HOST)->andReturn($config['host']);
+		Functions\expect('_rocket_get_wp_rocket_cache_path')->with($config['home_url'], PHP_URL_HOST)->andReturn($config['path']);
+		$this->filesystem->expects()->dirlist($config['cache_path'])->andReturn($config['entries']);
+		$this->filesystem->expects()->is_dir($config['entry_path'])->andReturn(false);
+		$this->filesystem->expects()->delete($config['entry_path']);
+		$this->subscriber->remove_root_cached_files();
+	}
+}