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<?php
// Generate: php artisan make:resource PostResource
// app/Http/Resources/PostResource.php

namespace App\Http\Resources;

use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

class PostResource extends JsonResource
{
    public function toArray(Request $request): array
    {
        return [
            'id'           => $this->id,
            'title'        => $this->title,
            'slug'         => $this->slug,
            'excerpt'      => str($this->body)->limit(160)->toString(),
            'status'       => $this->status,
            'published_at' => $this->published_at?->toIso8601String(),
            'author'       => new UserResource($this->whenLoaded('user')),
            'tags'         => TagResource::collection($this->whenLoaded('tags')),
            'comments_count' => $this->whenCounted('comments'),
            'links'        => [
                'self' => route('api.posts.show', $this->id),
            ],
        ];
    }
}

// In the controller:
// return PostResource::collection(Post::with(['user', 'tags'])->paginate(15));
// return new PostResource($post->load(['user', 'tags']));