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/Fediverse/Models/ActivityModel.php

@@ -0,0 +1,120 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright  2021 Podlibre
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+namespace Modules\Fediverse\Models;
+
+use CodeIgniter\Database\BaseResult;
+use CodeIgniter\I18n\Time;
+use DateTimeInterface;
+use Michalsn\Uuid\UuidModel;
+use Modules\Fediverse\Entities\Activity;
+
+class ActivityModel extends UuidModel
+{
+    /**
+     * @var string
+     */
+    protected $table = 'activitypub_activities';
+
+    /**
+     * @var string
+     */
+    protected $primaryKey = 'id';
+
+    /**
+     * @var string[]
+     */
+    protected $uuidFields = ['id', 'post_id'];
+
+    /**
+     * @var string[]
+     */
+    protected $allowedFields = [
+        'id',
+        'actor_id',
+        'target_actor_id',
+        'post_id',
+        'type',
+        'payload',
+        'task_status',
+        'scheduled_at',
+    ];
+
+    /**
+     * @var string
+     */
+    protected $returnType = Activity::class;
+
+    /**
+     * @var bool
+     */
+    protected $useSoftDeletes = false;
+
+    /**
+     * @var bool
+     */
+    protected $useTimestamps = true;
+
+    protected $updatedField;
+
+    public function getActivityById(string $activityId): ?Activity
+    {
+        $cacheName =
+            config('Fediverse')
+                ->cachePrefix . "activity#{$activityId}";
+        if (! ($found = cache($cacheName))) {
+            $found = $this->find($activityId);
+
+            cache()
+                ->save($cacheName, $found, DECADE);
+        }
+
+        return $found;
+    }
+
+    /**
+     * Inserts a new activity record in the database
+     *
+     * @param Time $scheduledAt
+     */
+    public function newActivity(
+        string $type,
+        int $actorId,
+        ?int $targetActorId,
+        ?string $postId,
+        string $payload,
+        DateTimeInterface $scheduledAt = null,
+        ?string $taskStatus = null
+    ): BaseResult | int | string | false {
+        return $this->insert(
+            [
+                'actor_id' => $actorId,
+                'target_actor_id' => $targetActorId,
+                'post_id' => $postId,
+                'type' => $type,
+                'payload' => $payload,
+                'scheduled_at' => $scheduledAt,
+                'task_status' => $taskStatus,
+            ],
+            true,
+        );
+    }
+
+    /**
+     * @return Activity[]
+     */
+    public function getScheduledActivities(): array
+    {
+        return $this->where('`scheduled_at` <= NOW()', null, false)
+            ->where('task_status', 'queued')
+            ->orderBy('scheduled_at', 'ASC')
+            ->findAll();
+    }
+}