refactor(modules): extract castopod parts into a modules/ folder for a scalable HMVC structure

- create Admin, Analytics, Auth, Fediverse and Install modules in the root modules/ folder
- rename
ActivityPub to Fediverse

modules/Analytics/Controllers/EpisodeAnalyticsController.php

@@ -0,0 +1,82 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright  2020 Podlibre
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+namespace Modules\Analytics\Controllers;
+
+use CodeIgniter\Controller;
+use CodeIgniter\HTTP\RedirectResponse;
+use CodeIgniter\HTTP\RequestInterface;
+use CodeIgniter\HTTP\ResponseInterface;
+use Config\Services;
+use Modules\Analytics\Config\Analytics;
+use Psr\Log\LoggerInterface;
+
+class EpisodeAnalyticsController extends Controller
+{
+    /**
+     * An array of helpers to be loaded automatically upon class instantiation. These helpers will be available to all
+     * other controllers that extend Analytics.
+     *
+     * @var string[]
+     */
+    protected $helpers = ['analytics'];
+
+    protected Analytics $config;
+
+    /**
+     * Constructor.
+     */
+    public function initController(
+        RequestInterface $request,
+        ResponseInterface $response,
+        LoggerInterface $logger
+    ): void {
+        // Do Not Edit This Line
+        parent::initController($request, $response, $logger);
+
+        set_user_session_deny_list_ip();
+        set_user_session_location();
+        set_user_session_player();
+
+        $this->config = config('Analytics');
+    }
+
+    public function hit(string $base64EpisodeData, string ...$audioFilePath): RedirectResponse
+    {
+        $session = Services::session();
+        $session->start();
+
+        $serviceName = '';
+        if (isset($_GET['_from'])) {
+            $serviceName = $_GET['_from'];
+        } elseif ($session->get('embeddable_player_domain') !== null) {
+            $serviceName = $session->get('embeddable_player_domain');
+        } elseif ($session->get('referer') !== null && $session->get('referer') !== '- Direct -') {
+            $serviceName = parse_url($session->get('referer'), PHP_URL_HOST);
+        }
+
+        $episodeData = unpack(
+            'IpodcastId/IepisodeId/IbytesThreshold/IfileSize/Iduration/IpublicationDate',
+            base64_url_decode($base64EpisodeData),
+        );
+
+        podcast_hit(
+            $episodeData['podcastId'],
+            $episodeData['episodeId'],
+            $episodeData['bytesThreshold'],
+            $episodeData['fileSize'],
+            $episodeData['duration'],
+            $episodeData['publicationDate'],
+            $serviceName,
+        );
+
+        return redirect()->to($this->config->getAudioFileUrl(['podcasts', ...$audioFilePath]));
+    }
+}