Shopware Script to delete Articles from a CSV

ApiClient.php

<?php
class ApiClient
{
    const METHOD_GET = 'GET';
    const METHOD_PUT = 'PUT';
    const METHOD_POST = 'POST';
    const METHOD_DELETE = 'DELETE';
    protected $validMethods = [
        self::METHOD_GET,
        self::METHOD_PUT,
        self::METHOD_POST,
        self::METHOD_DELETE,
    ];
    protected $apiUrl;
    protected $cURL;

    public function __construct($apiUrl, $username, $apiKey)
    {
        $this->apiUrl = rtrim($apiUrl, '/') . '/';
        //Initializes the cURL instance
        $this->cURL = curl_init();
        curl_setopt($this->cURL, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($this->cURL, CURLOPT_FOLLOWLOCATION, false);
        curl_setopt($this->cURL, CURLOPT_USERAGENT, 'Shopware ApiClient');
        curl_setopt($this->cURL, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
        curl_setopt($this->cURL, CURLOPT_USERPWD, $username . ':' . $apiKey);
        curl_setopt(
            $this->cURL,
            CURLOPT_HTTPHEADER,
            ['Content-Type: application/json; charset=utf-8']
        );
    }

    public function call($url, $method = self::METHOD_GET, $data = [], $params = [])
    {
        if (!in_array($method, $this->validMethods)) {
            throw new Exception('Invalid HTTP-Methode: ' . $method);
        }
        $queryString = '';
        if (!empty($params)) {
            $queryString = http_build_query($params);
        }
        $url = rtrim($url, '?') . '?';
        $url = $this->apiUrl . $url . $queryString;
        $dataString = json_encode($data);
        curl_setopt($this->cURL, CURLOPT_URL, $url);
        curl_setopt($this->cURL, CURLOPT_CUSTOMREQUEST, $method);
        curl_setopt($this->cURL, CURLOPT_POSTFIELDS, $dataString);
        $result = curl_exec($this->cURL);
        $httpCode = curl_getinfo($this->cURL, CURLINFO_HTTP_CODE);

        return $this->prepareResponse($result, $httpCode);
        // For Stress testing
//        return ['result' => $result, 'httpCode' => $httpCode];
    }

    public function get($url, $params = [])
    {
        return $this->call($url, self::METHOD_GET, [], $params);
    }

    public function post($url, $data = [], $params = [])
    {
        return $this->call($url, self::METHOD_POST, $data, $params);
    }

    public function put($url, $data = [], $params = [])
    {
        return $this->call($url, self::METHOD_PUT, $data, $params);
    }

    public function delete($url, $params = [])
    {
        return $this->call($url, self::METHOD_DELETE, [], $params);
    }

    protected function prepareResponse($result, $httpCode)
    {
        echo "<h2>HTTP: $httpCode</h2>";
        if (null === $decodedResult = json_decode($result, true)) {
            $jsonErrors = [
                JSON_ERROR_NONE => 'No error occurred',
                JSON_ERROR_DEPTH => 'The maximum stack depth has been reached',
                JSON_ERROR_CTRL_CHAR => 'Control character issue, maybe wrong encoded',
                JSON_ERROR_SYNTAX => 'Syntaxerror',
            ];
            echo '<h2>Could not decode json</h2>';
            echo 'json_last_error: ' . $jsonErrors[json_last_error()];
            echo '<br>Raw:<br>';
            echo '<pre>' . print_r($result, true) . '</pre>';

            return;
        }
        if (!isset($decodedResult['success'])) {
            echo 'Invalid Response';

            return;
        }
        if (!$decodedResult['success']) {
            echo '<h2>No Success</h2>';
            echo '<p>' . $decodedResult['message'] . '</p>';
            if (array_key_exists('errors', $decodedResult) && is_array($decodedResult['errors'])) {
                echo '<p>' . join('</p><p>', $decodedResult['errors']) . '</p>';
            }

            return;
        }
        echo '<h2>Success</h2>';

        return $decodedResult;
    }
}

DeleteArticles.php

<?php

require __DIR__ . '/ApiClient.php';

ini_set('display_errors', 1);
ini_set('allow_url_include', 1);
error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);

//Zugangsdaten hinterlegen
$client = new ApiClient('http://meineURL/api/', 
    'demo',
    'n82C76V0VBPlgGBiuiiEPkTVGeyQoXTnTcTCcdDK'); 

executeDeteletion();


//CSV als Array einlesen
function readCSV()
{
  //Dateiname hinterlegen
	$csvFile = file('test.csv');
	$data = [];
	foreach ($csvFile as $line) 
	{
		$data[] = str_getcsv($line);
	}
	return $data;
}

//Schleife zum Löschen von Artikeln
function executeDeteletion()
{
	$articles = readCSV();
	foreach ($articles as $article)
	{
		if($article[0] != 'ordernumber')
			{
				deleteArticle($article[0]);
			}
	}
}

//API-Call zur Löschung
function deleteArticle($article)
{	
	global $client;
	$url = 'articles/'.getArticleID($article);
	$client->delete($url);
}

//Artikelnummer in ID umwandeln
function getArticleID($ordernumber)
{
	global $client;
	$url = 'articles/'.$ordernumber.'?useNumberAsId=true';

	$article = $client->get($url);
	$articleID = $article['data']['id'];
	return $articleID;
}

test.csv

ordernumber
SW10001
SW10002
SW10003
SW10004