snipe-it/app/Providers/AppServiceProvider.php

<?php
namespace App\Providers;

use Validator;
use Illuminate\Support\ServiceProvider;
use DB;
use Log;

/**
 * This service provider handles a few custom validation rules.
 *
 * PHP version 5.5.9
 * @version    v3.0
 */

class AppServiceProvider extends ServiceProvider
{
    /**
     * Custom email array validation
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.0]
     * @return void
     */
    public function boot()
    {

        // Email array validator
        Validator::extend('email_array', function ($attribute, $value, $parameters, $validator) {
            $value = str_replace(' ', '', $value);
            $array = explode(',', $value);

            foreach ($array as $email) { //loop over values
                $email_to_validate['alert_email'][]=$email;
            }

            $rules = array('alert_email.*'=>'email');
            $messages = array(
                 'alert_email.*'=>trans('validation.email_array')
            );

            $validator = Validator::make($email_to_validate, $rules, $messages);

            if ($validator->passes()) {
                return true;
            } else {
                return false;
            }

        });

        // Unique only if undeleted
        // This works around the use case where multiple deleted items have the same unique attribute.
        // (I think this is a bug in Laravel's validator?)
        Validator::extend('unique_undeleted', function ($attribute, $value, $parameters, $validator) {

            $count = DB::table($parameters[0])->select('id')->where($attribute, '=', $value)->whereNull('deleted_at')->where('id', '!=', $parameters[1])->count();

            if ($count < 1) {
                return true;
            } else {
                return false;
            }

        });

        // Share common variables with all views.
        view()->composer('*', function ($view) {
            $view->with('snipeSettings', \App\Models\Setting::getSettings());
        });
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        $monolog = Log::getMonolog();

        if (config('app.debug')) {
            $log_level = 'debug';
        } else {
            if (config('log-level')) {
                $log_level = config('log-level');
            } else {
                $log_level = 'error';
            }
        }

        foreach ($monolog->getHandlers() as $handler) {
            $handler->setLevel($log_level);
        }
    }
}