Export unpaid invoices from invoiceninja 4 and upload them to the izettle product catalog

invoiceninja-unpaid-invoices-to-izettle.php

<?php
// database config
$dbhost="localhost";
$dbname="invoiceninja";
$dbuser="invoiceninja";
$dbpass="changeme";
// obtain this by creating an app on https://developer.zettle.com/
// lol
$clientid="changeme-izettle-clientid";
$clientsecret="changeme-izettle-clientsecret";
// obtain this from your izettle account
$userclientid="changeme-izettle-userclientid";
$userapikey="changeme-userapikey";


// install all dependencies by running
// composer require laulamanapps/izettle-api
// from the command line 
error_reporting(E_ERROR | E_PARSE);
require 'vendor/autoload.php';
use GuzzleHttp\Client;
use LauLamanApps\IzettleApi\GuzzleIzettleClient;
use LauLamanApps\IzettleApi\IzettleClientFactory;
use LauLamanApps\IzettleApi\API\Product\Product;
use LauLamanApps\IzettleApi\API\Product\Variant;
use LauLamanApps\IzettleApi\API\Product\CategoryCollection;
use LauLamanApps\IzettleApi\API\Product\VariantCollection;
use LauLamanApps\IzettleApi\API\ImageCollection;
use Money\Money;



// mysql connection
$link = mysqli_connect($dbhost, $dbuser, $dbpass, $dbname);
$res = mysqli_query($link, "select invoice_number,balance from invoiceninja.invoices where invoice_status_id=2 and invoice_type_id=1 and is_deleted = 0 and balance != CAST(0 AS DECIMAL(13,2));");


//create zettle client

$iZettleClient = new GuzzleIzettleClient(new Client(), $clientid, $clientsecret);
$accessToken = $iZettleClient->getAccessTokenFromApiTokenAssertion($userapikey);


// create product client
$productClient = IzettleClientFactory::getProductClient($iZettleClient);



//delete all products
//yes, this deletes all your izettle products.
$library = $productClient->getProducts();
foreach ($library as $product) {
	$response = $productClient->deleteProduct($product);
}


//add all products
while ($row = mysqli_fetch_array($res)) {
	$variants[0]=Variant::new(null,null,null,null,1,null,Money::EUR(str_replace(".", "",$row['balance'])),null,19);
	$prod = Product::new($row['invoice_number'], $row['invoice_number'], new CategoryCollection(null), new ImageCollection(null), new VariantCollection($variants),null);
	$response = $productClient->createProduct($prod);
}

mysqli_close($link);
// hint: i can be run by nagios/naemon instead of your crontab ;-) 
echo "OK: unpaid invoices imported to izettle.";

?>