<?php

namespace ProcessMaker\Validation;

use Illuminate\Contracts\Validation\ImplicitRule;

use Illuminate\Database\QueryException;

use Illuminate\Support\Facades\Validator;

use Illuminate\Validation\ValidationException;

/**

* Must implement ImplicitRule because this always needs

* to be run, even if the field is empty.

*/

class CategoryRule implements ImplicitRule

{

public function __construct($model)

{

$this->model = $model;

}

public function passes($attribute, $value)

{

$type = explode('_', $attribute)[0];

$class = '\\ProcessMaker\\Models\\' . ucfirst($type) . 'Category';

/**

* If the model has previously been saved to the database,

* it's safe to assume that the category exists and is not

* a required parameter for an update.

*/

if (empty($value)) {

if ($this->model && $this->model->exists) {

return true;

} else {

validator()->validate([], [$attribute => 'required']);

}

}

if (strpos($value, ',') !== false) {

$ids = explode(',', $value);

} else {

$ids = [$value];

}

foreach ($ids as $id) {

if (!$class::where('id', $id)->exists()) {

return false;

}

}

return true;

}

public function message()

{

return 'Invalid category';

}

}