public function createCreditNotes($data){

        $this->load->model('report/purchase_invoice');

        foreach($data as $returnedAt => $return) {

            $invoiceData = null;
            $invoiceData = [];
            $invoiceData['createdAt'] = $returnedAt;

            foreach ($return as $key => $product) {

                $totalCNPRice = 0;
                $invoiceData['reference'] = $key;

                $invoiceData['products'] = null;
                $invoiceData['products'] = [];

                foreach ($product as $p) {
                    $invoiceData['products'][] = [
                        'name' => $p['product'],
                        'product_barcode' => $p['product_barcode'],
                        'quantity' => $p['returned_quantity'],
                        'cost' => $p['cost'],
                        'currency_code' => $p['currency_code'],
                        'total' => $p['total_for_product']
                    ];

                    $totalCNPRice += $p['total_for_product'];
                }

                $invoiceData['totalPrice']= $totalCNPRice;
                $invoiceData['reference_number'] = $this->generateInvoiceNumber($key,false);
                $generator = $this->generateCNNumber($invoiceData['reference']);
                $invoiceData['cn_number'] = $generator['cn_number'];

                $insert = null;
                $insert = [];

                $insert['date_for'] = $invoiceData['reference'];
                $insert['version'] = $generator['version'];
                $insert['data'] = json_encode($invoiceData);
                $insert['number'] = $generator['cn_number'];
                $insert['total'] = $totalCNPRice;

                $this->model_report_purchase_invoice->saveCreditNoteToDB($insert);
            }
        }


    }