user()?->can('products.restock') ?? false; } /** * Get the validation rules that apply to the request. * * @return array|string> */ public function rules(): array { return [ 'quantity' => ['required', 'integer', $this->integerMinRule(1)], 'notes' => ['nullable', 'string', $this->maxLengthRule(500)], ]; } private function integerMinRule(int $min): \Closure { return static function (string $attribute, mixed $value, \Closure $fail) use ($min): void { if ($value === null || $value === '' || filter_var($value, FILTER_VALIDATE_INT) === false) { return; } if ((int) $value < $min) { $fail("The {$attribute} must be at least {$min}."); } }; } private function maxLengthRule(int $max): \Closure { return static function (string $attribute, mixed $value, \Closure $fail) use ($max): void { if (is_string($value) && mb_strlen($value) > $max) { $fail("The {$attribute} field must not exceed {$max} characters."); } }; } }