I’ve recently installed OneStepCheckout (http://www.onestepcheckout.com/) on a couple of Magento installations. The extension is very nice, really simple to integrate and I expect to see better conversion rates on the checkout process.

One cool thing is that it comes with the option of activating Customer Order Comments – it adds a textarea field on the checkout page, and a box with the customer comments in the admin, when viewing the order.

However, one of my clients requested I added these comments in the invoice PDF’s. So, here’s how to do it:

Step 1
Copy app/code/core/Mage/Sales/Model/Order/Pdf/Invoice.php to app/code/local/Mage/Sales/Model/Order/Pdf/Invoice.php

Step 2
Open the new file and create a new method:

	function insertOscComments(&$page, $order) {
		if( !$order->getOnestepcheckoutCustomercomment() ) { return; }
		$this->y -= 20;
		$page->setFillColor(new Zend_Pdf_Color_Rgb(0.93, 0.92, 0.92));
		$page->setLineColor(new Zend_Pdf_Color_GrayScale(0.5));
		$page->setLineWidth(0.5);
		$page->drawRectangle(25, $this->y, 570, $this->y - 20);
		$page->setFillColor(new Zend_Pdf_Color_Rgb(1, 1, 1));
		$page->drawRectangle(25, $this->y - 20, 570, $this->y - 40);
		
		$page->setFillColor(new Zend_Pdf_Color_RGB(0.1, 0.1, 0.1));
		$page->drawText(Mage::helper('onestepcheckout')->__('Customer Comments'), 35, $this->y - 13, 'UTF-8');
		$page->drawText($order->getOnestepcheckoutCustomercomment(), 33, $this->y - 33, 'UTF-8');
		$this->y -= 50;
	}

Step 3
At the end of method getPdf add a call to the new method you created:

  /* Add totals */
  $this->insertTotals($page, $invoice);

  /* Add OneStepCheckout Customer Comments */
  $this->insertOscComments($page, $order);
}

And that’s all you need.

Cristi Magento Magento, onestepcheckout, PHP