2.x

app/Actions/User/UpdateProjects.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Actions\User;
+
+use App\Models\Project;
+use App\Models\User;
+use Illuminate\Validation\Rule;
+
+class UpdateProjects
+{
+    public function update(User $user, array $input): void
+    {
+        $this->validate($input);
+        $user->projects()->sync($input['projects']);
+
+        if ($user->currentProject && !$user->projects->contains($user->currentProject)) {
+            $user->current_project_id = null;
+            $user->save();
+        }
+
+        /** @var Project $firstProject */
+        $firstProject = $user->projects->first();
+        if (!$user->currentProject && $firstProject) {
+            $user->current_project_id = $firstProject->id;
+            $user->save();
+        }
+    }
+
+    private function validate(array $input): void
+    {
+        validator($input, self::rules())->validate();
+    }
+
+    public static function rules(): array
+    {
+        return [
+            'projects.*' => [
+                'required',
+                Rule::exists('projects', 'id'),
+            ],
+        ];
+    }
+}