autocde2.0/app/Http/Requests/API/Requirement/CreateOrUpdateRequest.php

<?php

namespace App\Http\Requests\API\Requirement;

use App\Http\Requests\RuleHelper;
use App\Models\Enums\RequirementStatus;
use App\Models\User;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Support\Facades\Auth;
use Illuminate\Validation\Rule;
use Illuminate\Validation\Rules\Enum;

class CreateOrUpdateRequest extends FormRequest
{
    use RuleHelper;

    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
     */
    public function rules(): array
    {
        return [
            'title' => 'required|max:255',
            'status' => [
                'required',
                new Enum(RequirementStatus::class),
            ],
            'asset_id' => [
                'required',
                Rule::exists('assets', 'id')->where($this->userCompanyWhere()),
            ],
            'mailto' => [
                'array',
                function ($attribute, $value, $fail) {
                    $userCount = User::where("company_id", Auth::user()->company_id)->whereIn('id', $value)->count();

                    if ($userCount != count($value)) {
                        $fail('The selected user is invalid.');
                    }
                }
            ],
            'priority' => 'required|in:1,2,3,4',
            'requirement_group_id' => [
                'required',
                Rule::exists('requirement_groups', 'id')->where($this->userCompanyWhere()),
            ]
        ];
    }
}