Save workspace changes

.deploy/artwork-evolution-release/app/Services/GroupFollowService.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services;
+
+use App\Models\Group;
+use App\Models\GroupFollow;
+use App\Models\User;
+use Illuminate\Support\Facades\DB;
+
+class GroupFollowService
+{
+    public function follow(Group $group, User $user): bool
+    {
+        if ($group->hasActiveMember($user)) {
+            return false;
+        }
+
+        return DB::transaction(function () use ($group, $user): bool {
+            $created = GroupFollow::query()->firstOrCreate([
+                'group_id' => $group->id,
+                'user_id' => $user->id,
+            ]);
+
+            $this->syncFollowerCount($group);
+
+            return $created->wasRecentlyCreated;
+        });
+    }
+
+    public function unfollow(Group $group, User $user): bool
+    {
+        $deleted = GroupFollow::query()
+            ->where('group_id', $group->id)
+            ->where('user_id', $user->id)
+            ->delete() > 0;
+
+        if ($deleted) {
+            $this->syncFollowerCount($group);
+        }
+
+        return $deleted;
+    }
+
+    public function isFollowing(Group $group, ?User $user): bool
+    {
+        if (! $user) {
+            return false;
+        }
+
+        return GroupFollow::query()
+            ->where('group_id', $group->id)
+            ->where('user_id', $user->id)
+            ->exists();
+    }
+
+    public function syncFollowerCount(Group $group): void
+    {
+        $group->forceFill([
+            'followers_count' => GroupFollow::query()->where('group_id', $group->id)->count(),
+            'last_activity_at' => now(),
+        ])->save();
+    }
+}