invoiceninja/app/Utils/Traits/MakesReminders.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com)
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2019. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Utils\Traits;

use Illuminate\Support\Carbon;

/**
 * Class MakesReminders.
 */
trait MakesReminders
{
    public function setReminder($settings = null)
    {
        if (!$settings) {
            $settings = $this->client->getMergedSettings();
        }

        if (!$this->isPayable()) {
            $this->next_send_date = null;
            $this->save();
            return; //exit early
        }

        $nsd = null;

        if ($settings->enable_reminder1 !== false &&
            $settings->schedule_reminder1 == 'after_invoice_date' &&
            $settings->num_days_reminder1 > 0) {
            $reminder_date = Carbon::parse($this->date)->addDays($settings->num_days_reminder1);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }
        
        if ($settings->enable_reminder1 !== false &&
            $settings->schedule_reminder1 == 'before_due_date' &&
            $settings->num_days_reminder1 > 0) {
            $reminder_date = Carbon::parse($this->due_date)->subDays($settings->num_days_reminder1);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }


        if ($settings->enable_reminder1 !== false &&
            $settings->schedule_reminder1 == 'after_due_date' &&
            $settings->num_days_reminder1 > 0) {
            $reminder_date = Carbon::parse($this->due_date)->addDays($settings->num_days_reminder1);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }
        
        if ($settings->enable_reminder2 !== false &&
            $settings->schedule_reminder2 == 'after_invoice_date' &&
            $settings->num_days_reminder2 > 0) {
            $reminder_date = Carbon::parse($this->date)->addDays($settings->num_days_reminder2);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }
        
        if ($settings->enable_reminder2 !== false &&
            $settings->schedule_reminder2 == 'before_due_date' &&
            $settings->num_days_reminder2 > 0) {
            $reminder_date = Carbon::parse($this->due_date)->subDays($settings->num_days_reminder2);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }


        if ($settings->enable_reminder2 !== false &&
            $settings->schedule_reminder2 == 'after_due_date' &&
            $settings->num_days_reminder2 > 0) {
            $reminder_date = Carbon::parse($this->due_date)->addDays($settings->num_days_reminder2);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }

        if ($settings->enable_reminder3 !== false &&
            $settings->schedule_reminder3 == 'after_invoice_date' &&
            $settings->num_days_reminder3 > 0) {
            $reminder_date = Carbon::parse($this->date)->addDays($settings->num_days_reminder3);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }
        
        if ($settings->enable_reminder3 !== false &&
            $settings->schedule_reminder3 == 'before_due_date' &&
            $settings->num_days_reminder3 > 0) {
            $reminder_date = Carbon::parse($this->due_date)->subDays($settings->num_days_reminder3);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }


        if ($settings->enable_reminder3 !== false &&
            $settings->schedule_reminder3 == 'after_due_date' &&
            $settings->num_days_reminder3 > 0) {
            $reminder_date = Carbon::parse($this->due_date)->addDays($settings->num_days_reminder3);

            if (!$nsd) {
                $nsd = $reminder_date;
            }
            
            if ($reminder_date->lt($nsd)) {
                $nsd = $reminder_date;
            }
        }
                
        $this->next_send_date = $nsd;
        $this->save();
    }
}