snipe-it/app/Notifications/CheckinAssetNotification.php

<?php

namespace App\Notifications;

use App\Models\Asset;
use App\Models\Setting;
use App\Models\User;
use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Notifications\Messages\SlackMessage;
use Illuminate\Notifications\Notification;

class CheckinAssetNotification extends Notification
{
    use Queueable;


    /**
     * Create a new notification instance.
     *
     * @param $params
     */
    public function __construct(Asset $asset, $checkedOutTo, User $checkedInBy, $note)
    {
        $this->target = $checkedOutTo;
        $this->item   = $asset;
        $this->admin  = $checkedInBy;
        $this->note   = $note;

        $this->settings = Setting::getSettings();
        $this->expected_checkin = '';

        if ($this->item->expected_checkin) {
            $this->expected_checkin = \App\Helpers\Helper::getFormattedDateObject($this->item->expected_checkin, 'date',
                false);
        }
    }

    /**
     * Get the notification's delivery channels.
     *
     * @return array
     */
    public function via()
    {

        $notifyBy = [];

        if (Setting::getSettings()->slack_endpoint!='') {
            \Log::debug('use slack');
            $notifyBy[] = 'slack';
        }

        /**
         * Only send checkin notifications to users if the category
         * has the corresponding checkbox checked.
         */
        if ($this->item->checkin_email() && $this->target instanceof User && $this->target->email != '')
        {
            \Log::debug('use email');
            $notifyBy[] = 'mail';
        }

        return $notifyBy;
    }

    public function toSlack()
    {

        $admin = $this->admin;
        $item = $this->item;
        $note = $this->note;
        $botname = ($this->settings->slack_botname!='') ? $this->settings->slack_botname : 'Snipe-Bot' ;

        $fields = [
            trans('general.administrator') => '<'.$admin->present()->viewUrl().'|'.$admin->present()->fullName().'>',
            trans('general.status') => $item->assetstatus->name,
            trans('general.location') => ($item->location) ? $item->location->name : '',
        ];

        return (new SlackMessage)
            ->content(':arrow_down: :computer: '.trans('mail.Asset_Checkin_Notification'))
            ->from($botname)
            ->attachment(function ($attachment) use ($item, $note, $admin, $fields) {
                $attachment->title(htmlspecialchars_decode($item->present()->name), $item->present()->viewUrl())
                    ->fields($fields)
                    ->content($note);
            });


    }

    /**
     * Get the mail representation of the notification.
     *
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail()
    {
        $fields = [];

        // Check if the item has custom fields associated with it
        if (($this->item->model) && ($this->item->model->fieldset)) {
            $fields = $this->item->model->fieldset->fields;
        }

        $message = (new MailMessage)->markdown('notifications.markdown.checkin-asset',
            [
                'item'          => $this->item,
                'admin'         => $this->admin,
                'note'          => $this->note,
                'target'        => $this->target,
                'fields'        => $fields,
                'expected_checkin'  => $this->expected_checkin,
            ])
            ->subject(trans('mail.Asset_Checkin_Notification'));


        return $message;
    }

}