partial wip oninstanceactioncompletion.php

<?php
class OnInstanceActionComplete extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->addOption( 'action', 'The action which was taken.', true, true );
        $this->addOption( 'instance', 'Instance name.', true, true );
    }

    public function execute() {
        $validActions = array(
            'reboot',
            'build'
        );

        if ( !in_array( $this->getOption( 'action' ), $validActions ) ) {
            $this->error( "Unrecognised action.\n", true );
        }

        $db = $this->getDB();
        $result = $db->selectRow(
            'openstack_notification_event'
            array( 'event_actor_id', 'event_project' ),
            array(
                'event_action' => $this->getOption( 'action' ),
                'event_instance' => $this->getOption( 'instance' )
            ),
            __METHOD__
        );

        EchoEvent::create( array(
            'type' => 'osm-instance-' . $this->getOption( 'action' ) . '-completed',
            'title' => Title::newFromText( $result->event_project, NS_NOVA_RESOURCE ),
            'agent' => User::newFromId( $result->event_actor_id ),
            'extra' => array(
                'instanceName' => $this->getOption( 'instance' ),
                'projectName' => $result->event_project
            )
        ) );

        $db->delete(
            'openstack_notification_event',
            array(
                'event_action' => $this->getOption( 'action' ),
                'event_instance' => $this->getOption( 'instance' ),
                'event_project' => $result->event_project,
                'event_actor_id' => $result->event_actor_id
            ),
            __METHOD__
        );
    }
}