<?php

namespace App\Traits;

use App\Lib\Helpers\ToolboxHelper;
use \Illuminate\Support\Str;

trait HasUniqueField
{
    /**
     * Asserts using validation that the field is unique
     *
     * @param string       $field
     * @param string|null  $value
     * @param integer|null $id
     * @param string|null  $slugField
     * @return void
     * @throws \Illuminate\Validation\ValidationException If the given field already exists.
     */
    private function assertFieldIsUnique(string $field, ?string $value = null, ?int $id = null, ?string $slugField = null): void
    {
        if (!is_null($value)) {
            $table = $this->getTable();
            ToolboxHelper::assertFieldIsUnique($table, $field, $value, $id);

            if (!is_null($slugField)) {
                ToolboxHelper::assertFieldIsUnique($table, $slugField, Str::slug($value), $id);
            }
        }
    }
}