Migrate backend to Porto architecture and fix minor bugs

- Fully transitioned the backend to the Porto architectural pattern
- Improved code organization and maintainability
- Fixed minor bugs and inconsistencies

app/Containers/Article/Tasks/GetPostsTask.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Containers\Article\Tasks;
+
+use App\Containers\Article\Models\Post;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Pagination\LengthAwarePaginator;
+use Carbon\Carbon;
+
+class GetPostsTask
+{
+    public function run(array $filters): LengthAwarePaginator
+    {
+        $cacheKey = 'posts_' . md5(serialize($filters));
+
+        return Cache::remember($cacheKey, now()->addHours(1), function () use ($filters) {
+            $query = Post::query()
+                ->with('category')
+                ->select('title', 'slug', 'authors', 'category_id', 'preview', 'search_data', 'publish_at')
+                ->where('status', 'published')
+                ->where('publish_at', '<', Carbon::now())
+                ->when(!empty($filters['tag']), function ($query) use ($filters) {
+                    if (is_array($filters['tag'])) {
+                        return $query->withAnyTags($filters['tag']);
+                    }
+
+                    $slugsArray = explode(',', $filters['tag']);
+                    return $query->withAnyTags($slugsArray);
+                })
+                ->when(!empty($filters['category']), function ($query) use ($filters) {
+                    if (is_array($filters['category'])) {
+                        $query->whereHas('category', function ($query) use ($filters) {
+                            $query->whereIn('slug', $filters['category']);
+                        });
+                    }
+                })
+                ->when(!empty($filters['search']), function ($query) use ($filters) {
+                    $query->whereRaw('LOWER(title) like ?', ["%".strtolower($filters['search'])."%"]);
+                });
+
+            $sort = $filters['sort'] ?? 'desc';
+            return $query->orderBy('publish_at', $sort)->paginate(9)->withQueryString();
+        });
+    }
+}