trypost/app/Http/Requests/App/Post/UpdatePostRequest.php

<?php

declare(strict_types=1);

namespace App\Http\Requests\App\Post;

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class UpdatePostRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    public function rules(): array
    {
        return [
            'status' => ['sometimes', 'string'],
            'scheduled_at' => ['sometimes', 'nullable', 'string'],
            'platforms' => ['sometimes', 'array'],
            'platforms.*.id' => ['required', 'uuid', Rule::exists('post_platforms', 'id')->where('post_id', $this->route('post')->id ?? $this->route('post'))],
            'platforms.*.content' => ['nullable', 'string', 'max:5000'],
            'label_ids' => ['sometimes', 'array'],
            'label_ids.*' => ['uuid', Rule::exists('workspace_labels', 'id')->where('workspace_id', $this->user()->currentWorkspace->id)],
        ];
    }

    public function messages(): array
    {
        return [
            'scheduled_at.after' => 'The scheduled date must be in the future.',
        ];
    }
}