App\services\ImportService::initMaps PHP Method

    private function initMaps()
    {
        $this->init();
        $this->maps = ['client' => [], 'invoice' => [], 'invoice_client' => [], 'product' => [], 'countries' => [], 'countries2' => [], 'currencies' => [], 'client_ids' => [], 'invoice_ids' => [], 'vendors' => [], 'expense_categories' => []];
        $clients = $this->clientRepo->all();
        foreach ($clients as $client) {
            $this->addClientToMaps($client);
        }
        $invoices = $this->invoiceRepo->all();
        foreach ($invoices as $invoice) {
            $this->addInvoiceToMaps($invoice);
        }
        $products = $this->productRepo->all();
        foreach ($products as $product) {
            $this->addProductToMaps($product);
        }
        $countries = Cache::get('countries');
        foreach ($countries as $country) {
            $this->maps['countries'][strtolower($country->name)] = $country->id;
            $this->maps['countries2'][strtolower($country->iso_3166_2)] = $country->id;
        }
        $currencies = Cache::get('currencies');
        foreach ($currencies as $currency) {
            $this->maps['currencies'][strtolower($currency->code)] = $currency->id;
        }
        $vendors = $this->vendorRepo->all();
        foreach ($vendors as $vendor) {
            $this->addVendorToMaps($vendor);
        }
        $expenseCaegories = $this->expenseCategoryRepo->all();
        foreach ($expenseCaegories as $category) {
            $this->addExpenseCategoryToMaps($category);
        }
    }