invoiceninja/app/Services/PurchaseOrder/CreateInvitations.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2022. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Services\PurchaseOrder;

use App\Factory\ClientContactFactory;
use App\Factory\PurchaseOrderInvitationFactory;
use App\Factory\VendorContactFactory;
use App\Models\Invoice;
use App\Models\PurchaseOrder;
use App\Models\PurchaseOrderInvitation;
use App\Services\AbstractService;
use App\Utils\Traits\MakesHash;
use Illuminate\Support\Str;

class CreateInvitations extends AbstractService
{
    use MakesHash;
    
    private $purchase_order;

    public function __construct(PurchaseOrder $purchase_order)
    {
        $this->purchase_order = $purchase_order;
    }

    public function run()
    {

        $contacts = $this->purchase_order->vendor->contacts()->where('send_email', true)->get();

        if($contacts->count() == 0){
            $this->createBlankContact();

            $this->purchase_order->refresh();
            $contacts = $this->purchase_order->vendor->contacts;
        }

        $contacts->each(function ($contact) {
            $invitation = PurchaseOrderInvitation::where('company_id', $this->purchase_order->company_id)
                                        ->where('vendor_contact_id', $contact->id)
                                        ->where('purchase_order_id', $this->purchase_order->id)
                                        ->withTrashed()
                                        ->first();

            if (! $invitation && $contact->send_email) {
                $ii = PurchaseOrderInvitationFactory::create($this->purchase_order->company_id, $this->purchase_order->user_id);
                $ii->key = $this->createDbHash($this->purchase_order->company->db);
                $ii->purchase_order_id = $this->purchase_order->id;
                $ii->vendor_contact_id = $contact->id;
                $ii->save();
            } elseif ($invitation && ! $contact->send_email) {
                $invitation->delete();
            }
        });

        if($this->purchase_order->invitations()->count() == 0) {
            
            if($contacts->count() == 0){
                $contact = $this->createBlankContact();
            }
            else{
                $contact = $contacts->first();

                            $invitation = PurchaseOrderInvitation::where('company_id', $this->purchase_order->company_id)
                                        ->where('vendor_contact_id', $contact->id)
                                        ->where('purchase_order_id', $this->purchase_order->id)
                                        ->withTrashed()
                                        ->first();

                            if($invitation){
                                $invitation->restore();
                                return $this->purchase_order;
                            }
            }

                $ii = PurchaseOrderInvitationFactory::create($this->purchase_order->company_id, $this->purchase_order->user_id);
                $ii->key = $this->createDbHash($this->purchase_order->company->db);
                $ii->purchase_order_id = $this->purchase_order->id;
                $ii->vendor_contact_id = $contact->id;
                $ii->save();
        }

        return $this->purchase_order;
    }

    private function createBlankContact()
    {
        $new_contact = VendorContactFactory::create($this->purchase_order->company_id, $this->purchase_order->user_id);
        $new_contact->vendor_id = $this->purchase_order->vendor_id;
        $new_contact->contact_key = Str::random(40);
        $new_contact->is_primary = true;
        $new_contact->send_email = true;
        $new_contact->save();

        return $new_contact;
    }
}