/**
  * Generate Invoice Batch
  *
  * Generate an Invoice for each billable account during the period set
  * in the form.
  */
 function generate_invoices()
 {
     $invoice_date = $this->post['date'];
     $terms = $this->post['terms'];
     $period_begin = $this->post['periodbegin'];
     $period_end = $this->post['periodend'];
     $note = $this->post['note'];
     // Get all accounts
     $accountdbo_array = load_array_AccountDBO();
     // Generate an invoice for each account
     foreach ($accountdbo_array as $account) {
         if ($account->getStatus() != "Active" || $account->getBillingStatus() == "Do Not Bill") {
             // Skip invalid, pending, and non-billable accounts
             continue;
         }
         // Create a new Invoice
         $invoice = new InvoiceDBO();
         $invoice->setAccountID($account->getID());
         $invoice->setDate(DBConnection::format_datetime($invoice_date));
         $invoice->setPeriodBegin(DBConnection::format_datetime($period_begin));
         $invoice->setPeriodEnd(DBConnection::format_datetime($period_end));
         $invoice->setNote($note);
         $invoice->setTerms($terms);
         // Generate line items
         $invoice->generate();
         $invoiceItems = $invoice->getItems();
         if (empty($invoiceItems)) {
             // Abandon empty invoices
             continue;
         }
         // Insert invoice into database
         add_InvoiceDBO($invoice);
     }
     // Success
     $this->setMessage(array("type" => "[INVOICE_BATCH_CREATED]"));
     $this->gotoPage("billing_invoices");
 }