Implement generic support for invoice plugins

ordernumbers_woocommerce.php

@@ -41,7 +41,10 @@ class OpenToolsOrdernumbers extends OpenToolsOrdernumbersBasic {
 		add_action( 'woocommerce_admin_field_ordernumber_variables',    array( $this, 'admin_field_variables' ) );
 		add_action( 'pre_update_option_ordernumber_variables',          array( $this, 'update_option_variables'));
 
+		// THIRD-PARTY PLUGIN SUPPORT
 		// Install hooks for third-party plugin support:
+		$this->thirdparty_invoicenumber_init();
+		// Support for specific plugins:
 		$this->thirdparty_wpo_wcpdf_init();
 		
 	}
@@ -298,82 +301,43 @@ class OpenToolsOrdernumbers extends OpenToolsOrdernumbersBasic {
 	}
 
 
-	/** ************************************************************
-	 *  Support for automatic extension updates
-	 ** ************************************************************/
-	public function update_access_check() {
-		$ordernumber = $_POST['order_number'];
-		$orderpass = $_POST['order_pass'];
-		
-		$json = $this->helper->ajax_counter_delete($_POST['nrtype'], $_POST['counter']);
-		wp_send_json($json);
+// THIRD-PARTY PLUGIN SUPPORT
+	
+	/** ****************************************************************
+	 *  Generic Invoice Number handling for third-party invoice plugins
+	 ** ****************************************************************
+	 *
+	 *  - Filter woocommerce_generate_invoice_number($default, $order) to create the invoice number
+	 *  - Filter woocommerce_invoice_number($default, $orderID) to retrieve the 
+	 *    invoice number (also create the invoice number if it does not yet exist)
+	 */
+
+	protected function thirdparty_invoicenumber_init() {
+		// The filter to actually return the order number for the given order
+		add_filter ('woocommerce_generate_invoice_number', array( &$this, 'thirdparty_create_invoicenumber'), 10, 2/*<= Also get the order object! */);
+		add_filter ('woocommerce_invoice_number', array( &$this, 'thirdparty_get_invoicenumber'), 10, 2/*<= Also get the order ID! */);
 	}
-    public function checkUpdateAccess($order_number, $order_pass, $json = array()) {
-		// First, extract the update server URL from the manifest, then load 
-		// the update XML from the update server, extract the download URL, 
-		// append the order number and password and check whether access is 
-		// possible.
-		$json['success'] = FALSE;
-		if (isset($this->_xmlFile)) {
-			$xmlfile = $this->_xmlFile;
+	
+	/**
+	 * Callback function for WooThemes PDF Invoices to generate an invoice number for an order
+	 * The hook to customize invoice numbers (requests the invoice number from the database; 
+	 * creates a new invoice number if no entry exists in the database)
+	 */
+	function thirdparty_create_invoicenumber($default, $order) {
+		return $this->get_or_create_number($default, $order, 'invoice');
+	}
+	
+	function thirdparty_get_invoicenumber($default, $orderid) {
+		if (get_option('customize_invoice', 'no')!='no') {
+			$_of = new WC_Order_Factory();
+			$order = $_of->get_order($orderid);
+			$number = $this->get_or_create_number($orderid, $order, 'invoice');
+			return $number;
 		} else {
-			// VM 2 does not set the _xmlFile property, so construct it manually
-			$xmlfile = JPATH_SITE . '/plugins/' . $this->_type . '/' . $this->_name . '/' . $this->_name . '.xml';
+			return $default;
 		}
-		$xml = simplexml_load_file($xmlfile);
-		if (!$xml || !isset($xml->updateservers)) {
-			JFactory::getApplication()->enqueueMessage(JText::sprintf('OPENTOOLS_XMLMANIFEST_ERROR', $this->_xmlFile), 'error');
-			return $json;
-		}
-		$updateservers = $xml->updateservers;
-		foreach ($updateservers->children() as $server) {
-			if ($server->getName()!='server') {
-				JFactory::getApplication()->enqueueMessage(JText::sprintf('OPENTOOLS_XMLMANIFEST_ERROR', $this->_xmlFile), 'error');
-				continue;
-			}
-			$updateurl = html_entity_decode((string)$server);
-			$updatescript = simplexml_load_file($updateurl);
-			if (!$updatescript) {
-				JFactory::getApplication()->enqueueMessage(JText::sprintf('OPENTOOLS_UPDATESCRIPT_ERROR', $updateurl), 'error');
-				continue;
-			}
-			$urls = $updatescript->xpath('/updates/update/downloads/downloadurl');
-			while (list( , $node) = each($urls)) {
-				$downloadurl = (string)($node);
-				if ($order_number) {
-					$downloadurl .= (parse_url($downloadurl, PHP_URL_QUERY) ? '&' : '?') . 'order_number=' . urlencode($order_number);
-				}
-				if ($order_pass) {
-					$downloadurl .= (parse_url($downloadurl, PHP_URL_QUERY) ? '&' : '?') . 'order_pass=' . urlencode($order_pass);
-				}
-				$downloadurl .= (parse_url($downloadurl, PHP_URL_QUERY) ? '&' : '?') . 'check_access=1';
-
-				$headers = get_headers($downloadurl);
-				list($version, $status_code, $msg) = explode(' ',$headers[0], 3);
-				
-				// Check the HTTP Status code
-				switch($status_code) {
-					case 200:
-						$json['success'] = TRUE;
-						JFactory::getApplication()->enqueueMessage($msg, 'message');
-						$this->setupUpdateCredentials($order_number, $order_pass);
-						break;
-					default:
-						JFactory::getApplication()->enqueueMessage($msg, 'error');
-						// Clear the credentials...
-						$this->setupUpdateCredentials("", "");
-						break;
-				}
-				$this->setAndSaveParams(array(
-					'update_credentials_checked'=>$json['success'],
-					'order_number' => $order_number,
-					'order_pass' => $order_pass,
-				));
-			}
-		}
-		return $json;
-    }
-
+	}
+	
 	
 	/** ************************************************************
 	 *  Support for WPO WooCommerce PDF Invoices and Packaging Slips