<?php

// ----------------------------------------------- //
//    Generate a unique ID for Google Analytics    //
// ----------------------------------------------- //

function gen_uuid() { // Generates a UUID. A UUID is required for the measurement protocol.
  return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
    // 32 bits for "time_low"
    mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
    // 16 bits for "time_mid"
    mt_rand( 0, 0xffff ),
    // 16 bits for "time_hi_and_version",
    // four most significant bits holds version number 4
    mt_rand( 0, 0x0fff ) | 0x4000,
    // 16 bits, 8 bits for "clk_seq_hi_res",
    // 8 bits for "clk_seq_low",
    // two most significant bits holds zero and one for variant DCE1.1
    mt_rand( 0, 0x3fff ) | 0x8000,
    // 48 bits for "node"
    mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff )
  );
}


// -------------------- //
//     GA Post Data     //
// -------------------- //

$url = 'https://www.google-analytics.com/collect'; // This is the URL to which we'll be sending the post request.
$user_agent = 'UltraCart/1.0'; // User agent recorded into Google


// ---------------------------------- //
//    Get UltraCart post back data    //
// ---------------------------------- //

// Read in the XML document from the post data
$xml_document = file_get_contents('php://input');

// Parse the XML Document into a DOM Object
$doc = new DOMDocument();
$doc->loadXML($xml_document);

// Extract key fields
$exports = $doc->getElementsByTagName("export");
foreach ($exports as $export) {
	$orders = $export->getElementsByTagName("order");
	
	// Get order element
	foreach($orders as $order) {
		
		// Get order data
		$orderCS = $order->getElementsByTagName("current_stage")->item(0)->nodeValue;           // gets the current stage of the order
		$orderPS = $order->getElementsByTagName("payment_status")->item(0)->nodeValue;          // gets the payment status of the order
		$orderSM = $order->getElementsByTagName("shipping_method")->item(0)->nodeValue;         // gets the shipping method of the order
		$orderTI = $order->getElementsByTagName("order_id")->item(0)->nodeValue;                // gets the transaction ID
		$orderTR = $order->getElementsByTagName("total")->item(0)->nodeValue;                   // gets the transaction revenue
		$orderTS = $order->getElementsByTagName("shipping_handling_total")->item(0)->nodeValue; // gets the transaction shipping
		$orderTT = $order->getElementsByTagName("tax")->item(0)->nodeValue;                     // gets the transaction tax
		$customField1 = $order->getElementsByTagName("custom_field_1")->item(0)->nodeValue;     // gets the product
		$customField2 = $order->getElementsByTagName("custom_field_2")->item(0)->nodeValue;     // gets the product category
		$customField4 = $order->getElementsByTagName("custom_field_4")->item(0)->nodeValue;     // gets the GA client ID
		$customField5 = $order->getElementsByTagName("custom_field_5")->item(0)->nodeValue;     // gets the subid value
		$orderOTI = $order->getElementsByTagName("auto_order_original_order_id")->item(0)->nodeValue; // gets the original transaction ID
		$orderRTR = $order->getElementsByTagName("total_refunded")->item(0)->nodeValue;               // gets the refunded transaction revenue
		$orderRBU = $order->getElementsByTagName("refund_by_user")->item(0)->nodeValue;               // gets the user who processed the refund
		$orderRMN = $order->getElementsByTagName("merchant_notes")->item(0)->nodeValue;               // gets the merchant notes for refund

			// ----------------------------------------- //
			//    POST Order Data to GOOGLE ANALYTICS    //
			// ----------------------------------------- //

			// generate (or pass through) unique ID for GA CID
			if (empty($customField4) || $customField4 == 'undefined') { $orderCID = gen_uuid(); } else { $orderCID = $customField4; }

			$orderData = array( // This is an associative array that will contain all the parameters that we'll send to Google Analytics
			  'v' => 1, // The version of the measurement protocol
			  'tid' => 'UA-######-###', // Google Analytics account ID
			  'cid' => $orderCID, // The client ID or UUID
			  't' => 'transaction' // Hit Type
			);
				
				// ------------------------------------------------------------ //
				//    If order is in 'Completed Order' stage -AND- 'Processed'  //
				//       -AND- not coming from the 'Shipping Department'        //
				//                             -OR-                             //
				//        in the 'Shipping Department' -AND- 'Processed'        //
				// ------------------------------------------------------------ //
				
				if (($orderCS === 'CO' && $orderPS === 'Processed' && empty($orderSM)) || ($orderCS === 'SD' && $orderPS === 'Processed')) {
					$orderData['dh'] = 'secure.ultracart.com'; // Sets the document hostname for GA
					$orderData['dp'] = '/processed'; // Sets the document path for GA
					$orderData['dt'] = 'Order Processed'; // Sets the document title for GA
					$orderData['ti'] = $orderTI; // Sets the transaction ID for GA
					$orderData['tr'] = $orderTR; // Sets the transaction revenue for GA
					$orderData['ts'] = $orderTS; // Sets the transaction shipping for GA
					$orderData['tt'] = $orderTT; // Sets the transaction tax for GA
					$orderData['cd3'] = $customField2; // Sets a custom dimension (Product Category)
					$orderData['cd4'] = $customField5; // Sets a custom dimension (Subid)
				}

				// --------------------------------------------------- //
				//           If order has been refunded from           //
				//    'Completed Orders' -OR- 'Shipping Department'    //
				// --------------------------------------------------- //

				if (($orderCS === 'CO' && $orderPS === 'Refunded') || ($orderCS === 'SD' && $orderPS === 'Refunded')) {
					$orderData['dh'] = 'secure.ultracart.com'; // Sets the document hostname for GA
					$orderData['dp'] = '/refunded'; // Sets the document path for GA
					$orderData['dt'] = 'Order Refunded'; // Sets the document title for GA
					$orderData['ti'] = 'ref-'.$orderOTI; // Sets the transaction ID for GA
					$orderData['tr'] = '-'.$orderRTR; // Sets the transaction revenue for GA
					$orderData['cd11'] = $orderRBU; // Sets a custom dimension (Refund by User)
					$orderData['cd5'] = $orderRMN; // Sets a custom dimension (Merchant Notes)
					$orderData['cd3'] = $customField2; // Sets a custom dimension (Product Category)
					$orderData['cd4'] = $customField5; // Sets a custom dimension (Subid)
				}

			$orderContent = http_build_query($orderData); // The body of the post must include exactly 1 URI encoded payload and must be no longer than 8192 bytes. See http_build_query.
			$orderContent = utf8_encode($orderContent); // The payload must be UTF-8 encoded.

			$orderCH = curl_init();
			curl_setopt($orderCH,CURLOPT_USERAGENT, $user_agent);
			curl_setopt($orderCH,CURLOPT_URL, $url);
			curl_setopt($orderCH,CURLOPT_HTTPHEADER,array('Content-type: application/x-www-form-urlencoded'));
			curl_setopt($orderCH,CURLOPT_HTTP_VERSION,CURL_HTTP_VERSION_1_1);
			curl_setopt($orderCH,CURLOPT_POST, TRUE);
			curl_setopt($orderCH,CURLOPT_POSTFIELDS, $orderContent);
			curl_exec($orderCH);
			curl_close($orderCH);

	} // END foreach($orders as $order)

		// Get item element/s
		$items = $order->getElementsByTagName("item");
		$i = 0; // set increment number
		foreach($items as $item) {

			// Get item data
			$itemIN = $item->getElementsByTagName("item_id")->item(0)->nodeValue;                  // gets the item name
			$itemIP = $item->getElementsByTagName("total_cost_with_discount")->item(0)->nodeValue; // gets the item price
			$itemIQ = $item->getElementsByTagName("quantity")->item(0)->nodeValue;                 // gets the item quantity
			
			// ------------------------------------------------------------ //
			//    If order is in 'Completed Order' stage -AND- 'Processed'  //
			//       -AND- not coming from the 'Shipping Department'        //
			//                             -OR-                             //
			//        in the 'Shipping Department' -AND- 'Processed'        //
			// ------------------------------------------------------------ //
			
			if (($orderCS === 'CO' && $orderPS === 'Processed' && empty($orderSM)) || ($orderCS === 'SD' && $orderPS === 'Processed')) { 

			// ---------------------------------------- //
			//    POST Item Data to GOOGLE ANALYTICS    //
			// ---------------------------------------- //

			$i++; // increase number for each $item
			$itemData = 'itemData'.$i; // append increment number to $itemData variable
			$itemContent = 'itemContent'.$i; // append increment number to $itemContent variable
			$itemCH = 'itemCH'.$i; // append increment number to $itemContent variable
			$itemCID = 'itemCID'.$i; // append increment number to $itemCID variable

			${$itemCID} = $orderCID; // use $orderCID as the GA CID

			${$itemData} = array( // This is an associative array that will contain all the parameters that we'll send to Google Analytics
			  'v' => 1, // The version of the measurement protocol
			  'tid' => 'UA-######-###', // Google Analytics account ID
			  'cid' => ${$itemCID}, // The client ID or UUID
			  't' => 'item' // Hit Type
			);

			${$itemData}['ti'] = $orderTI; // Sets the transaction ID for GA
			${$itemData}['in'] = $itemIN; // Sets the item name for GA
			${$itemData}['ip'] = $itemIP; // Sets the item price for GA
			${$itemData}['iq'] = $itemIQ; // Sets the item quantity for GA
			${$itemData}['cd3'] = $customField2; // Sets a custom dimension (Product Category)
			${$itemData}['cd4'] = $customField5; // Sets a custom dimension (Subid)

			${$itemContent} = http_build_query(${$itemData}); // The body of the post must include exactly 1 URI encoded payload and must be no longer than 8192 bytes. See http_build_query.
			${$itemContent} = utf8_encode(${$itemContent}); // The payload must be UTF-8 encoded.

			${$itemCH} = curl_init();
			curl_setopt(${$itemCH},CURLOPT_USERAGENT, $user_agent);
			curl_setopt(${$itemCH},CURLOPT_URL, $url);
			curl_setopt(${$itemCH},CURLOPT_HTTPHEADER,array('Content-type: application/x-www-form-urlencoded'));
			curl_setopt(${$itemCH},CURLOPT_HTTP_VERSION,CURL_HTTP_VERSION_1_1);
			curl_setopt(${$itemCH},CURLOPT_POST, TRUE);
			curl_setopt(${$itemCH},CURLOPT_POSTFIELDS, ${$itemContent});
			curl_exec(${$itemCH});
			curl_close(${$itemCH});
			
			} // END IF ORDER IS COMPLETED/SHIPPING AND PROCESSED

		} // END foreach($items as $item)
			
} // END foreach ($exports as $export)



// BEGIN $order/$export
foreach ($exports as $export) { foreach($orders as $order) {

	// ---------------------------------------------- //
	//    POST #1 to GOOGLE ANALYTICS (Event Data)    //
	// ---------------------------------------------- //

// ------------------------------------------------------------ //
//    If order is in 'Completed Order' stage -AND- 'Processed'  //
//       -AND- not coming from the 'Shipping Department'        //
//                             -OR-                             //
//        in the 'Shipping Department' -AND- 'Processed'        //
// ------------------------------------------------------------ //

if (($orderCS === 'CO' && $orderPS === 'Processed' && empty($orderSM)) || ($orderCS === 'SD' && $orderPS === 'Processed')) { 

	$data1 = array( // This is an associative array that will contain all the parameters that we'll send to Google Analytics
	  'v' => 1, // The version of the measurement protocol
	  'tid' => 'UA-######-###', // Google Analytics account ID
	  'cid' => $orderCID, // The client ID or UUID
	  't' => 'event' // Hit Type
	);
	
	$data1['dh'] = 'secure.ultracart.com'; // The GA document host name
	$data1['ec'] = 'Sales'; // The GA event category
	$data1['ea'] = 'Order Processed'; // The GA event action
	$data1['el'] = (isset($orderTI) ? $orderTI : 'No Order ID'); // The GA event label
	$data1['cd3'] = $customField2; // Sets a custom dimension (Product Category)
	$data1['cd4'] = $customField5; // Sets a custom dimension (Subid)
	
	$content1 = http_build_query($data1); // The body of the post must include exactly 1 URI encoded payload and must be no longer than 8192 bytes. See http_build_query.
	$content1 = utf8_encode($content1); // The payload must be UTF-8 encoded.
	
	$ch1 = curl_init();
	curl_setopt($ch1,CURLOPT_USERAGENT, $user_agent);
	curl_setopt($ch1,CURLOPT_URL, $url);
	curl_setopt($ch1,CURLOPT_HTTPHEADER,array('Content-type: application/x-www-form-urlencoded'));
	curl_setopt($ch1,CURLOPT_HTTP_VERSION,CURL_HTTP_VERSION_1_1);
	curl_setopt($ch1,CURLOPT_POST, TRUE);
	curl_setopt($ch1,CURLOPT_POSTFIELDS, $content1);
	curl_exec($ch1);
	curl_close($ch1);
	
} // END IF ORDER IS COMPLETED/SHIPPING AND PROCESSED

}} // END $order/$export


//
// NOTICES
//

foreach ($exports as $export) {
	foreach($orders as $order) {
		// Notice: Order processed and placed into 'Completed Orders'.
		if ($orderCS === 'CO' && $orderPS === 'Processed' && empty($orderSM)) { echo 'Order has been processed and placed into Completed Orders. ID is '.$orderTI.', CID is '.$orderCID.' and total is '.$orderTR.'. '; }
		// Notice: Order processed and placed into 'Shipping Department'.
		if ($orderCS === 'SD' && $orderPS === 'Processed') { echo 'Order has been processed and placed into Shipping Department. ID is '.$orderTI.', CID is '.$orderCID.' and total is '.$orderTR.'. '; }
		// Notice: Duplicate order ignored.
		if ($orderCS === 'CO' && $orderPS === 'Processed' && !empty($orderSM)) { echo 'Order from Shipping Department has been ignored. ID is '.$orderTI.' and total is '.$orderTR.'. '; }
		// Notice: Order refunded from 'Completed Orders'.
		if ($orderCS === 'CO' && $orderPS === 'Refunded') { echo 'Order from Completed Orders has been refunded. ID is '.$orderOTI.' and amount refunded is '.$orderRTR.'. Merchant Notes by '.$orderRBU.': '.$orderRMN.'. '; }
		// Notice: Order refunded from 'Shipping Department'.
		if ($orderCS === 'SD' && $orderPS === 'Refunded') { echo 'Order from shipping department has been refunded. ID is '.$orderOTI.' and amount refunded is '.$orderRTR.'. Merchant Notes by '.$orderRBU.': '.$orderRMN.'. '; }
	}
	foreach($items as $item) {
		// Get item data
		$itemIN = $item->getElementsByTagName("item_id")->item(0)->nodeValue;                  // gets the item name
		$itemIP = $item->getElementsByTagName("total_cost_with_discount")->item(0)->nodeValue; // gets the item price
		$itemIQ = $item->getElementsByTagName("quantity")->item(0)->nodeValue;                 // gets the item quantity
		// Notice: Items ordered.
		if ($orderCS === 'CO' && $orderPS === 'Processed' && empty($orderSM) || $orderCS === 'SD' && $orderPS === 'Processed') {echo 'Ordered '.$itemIQ.' of '.$itemIN.' for '.$itemIP.' each. ';}
	} 
}

?>