invoiceninja/app/Mail/SupportMessageSent.php

<?php

namespace App\Mail;

use App\Utils\Ninja;
use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;
use LimitIterator;
use SplFileObject;

class SupportMessageSent extends Mailable
{
 //   use Queueable, SerializesModels;

    public $message;

    public $send_logs;

    public function __construct($message, $send_logs)
    {
        $this->message = $message;
        $this->send_logs = $send_logs;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        $system_info = null;
        $log_lines = [];

        /*
         * With self-hosted version of Ninja,
         * we are going to bundle system-level info
         * and last 10 lines of laravel.log file.
         */
        if (Ninja::isSelfHost() && $this->send_logs !== false) {
            $system_info = Ninja::getDebugInfo();

            $log_file = new SplFileObject(sprintf('%s/laravel.log', base_path('storage/logs')));

            $log_file->seek(PHP_INT_MAX);
            $last_line = $log_file->key();
            $lines = new LimitIterator($log_file, $last_line - 100, $last_line);

            $log_lines = iterator_to_array($lines);
        }

        $account = auth()->user()->account;

        $plan = $account->plan ?: 'Self Hosted';

        $company = auth()->user()->company();
        $user = auth()->user();

        $subject = "Customer MSG {$user->present()->name} - [{$plan} - DB:{$company->db}]";

        return $this->from(config('mail.from.address'), config('mail.from.name')) 
                ->replyTo($user->email, $user->present()->name())
                ->subject($subject)
                ->markdown('email.support.message', [
                    'message' => $this->message,
                    'system_info' => $system_info,
                    'laravel_log' => $log_lines,
                ]);
    }
}