One of my clients has his own fork of WebME that he keeps current with the SVN version.

He mentioned a collision recently, where a hack he had written into the online store plugin was overwritten by updates.

So, in this post, I’ll demonstrate how to add a plugin that uses a trigger to run some code.

First, we define what needs to be done.

The client wants that when an order in an online store has been processed, an email is sent out to that client.

This immediately points out where the trigger point goes. The processing of orders is done in the file ww.plugins/online-store/verify/process-order.php, so we need to put the trigger in there as well, at the end of the OnlineStore_processOrder() function:

  Core_trigger('after-order-processed', array($order));

What happens at that point is that the CMS will check all plugins to see if there are any that have a trigger of the name “after-order-processed”, and if there are, then that trigger will be fired.

So, next we need to create the plugin. In fact, it’s so easy I’ll just write it straight out. I’m calling this one “DemoPlugin”, so we start by creating the directory /ww.plugins/demo-plugin”, and placing the file plugin.php in it:

<?php
$plugin=array(
  'name' => 'DemoPlugin',
  'triggers'      => array(
    'after-order-processed'=>'DemoPlugin_afterOrderProcessed',
  ),
  'description' => 'Sends an email after an order is processed',
);

function DemoPlugin_afterOrderProcessed($PAGEDATA, $order) {
  mail('kae.verens@gmail.com', 'subject line', print_r($order, true));
}

Simple!

Now, in order to do this, I edited one file which is part of the “official” WebME package, to add the trigger. If you find you need to do this, please contact me and tell me what you’re trying to do, and what you edited, so I can add it to the SVN version and not break your code in future releases.

I got a new laptop today, and as I’ve still got work to do, I need to get the system up and running so it can install WebME.

Here’s a minimal instruction set for installing WebME on your Fedora computer.

As ‘root’, run this in a console:

yum install httpd mysql-server php php-gd php-mysql php-pear-Log php-xml svn
echo "127.0.0.1 kvwebme" >> /etc/hosts

Then edit /etc/selinux/config, change “enabled” to “disabled” and restart your machine.

Login as your normal user, run this in the console:

mkdir ~/websites && cd ~/websites
svn co https://kv-webme.googlecode.com/svn/trunk/ kv-webme
chmod 755 /home/kae

‘su’ to ‘root’ again. Add this to /etc/httpd/conf/httpd.conf:

NameVirtualHost *:80
<Directory /home/kae/websites>
  AllowOverride All
</Directory>
<VirtualHost *:80>
  ServerName kvwebme
  DocumentRoot /home/kae/websites/kv-webme
</VirtualHost>

And finally, in the console again:

service httpd start
service mysqld start
chkconfig --level 35 mysqld on
chkconfig --level 35 httpd on

That’s it – your system is set up. From that point, just go to http://kvwebme/ and follow the instructions from there!