Controller

<?php

/**
 * CronController - The central cron controller. This cron controller needs
 * to be called every minute of every day. The cron controller itself will
 * handle various cron tasks within to determine how many times a certain call
 * needs to be executed. This way only one cronjob needs to be set in the
 * administration panel on the server, while the rest will be handled by the
 * application, and new cron jobs can be added to the application easily.
 *
 * THIS CONTROLLER NEEDS TO BE CALLED EVERY MINUTE OF EVERY DAY TO ENSURE THAT
 *         IT WILL LOOP THROUGH ALL THE OTHER CRON CLASSES PROPERLY
 *
 * @author Stefan van Beusekom
 * @version 1.0
 */
class CronController extends Zend_Controller_Action {

    // Layout has been disabled
    public function init() {
        $this->_helper->layout()->disableLayout();
        $this->_helper->viewRenderer->setNoRender(true);
    }

    public function calculateTimeout($timelimit) {
        set_time_limit($timelimit);
    }

    /**
     * Index of the cron controller, which it defaults to when no action is
     * given. The index of the cron controller loops through the cron classes
     * and calls the 'execute' method to perform the cron job.
     *
     * @author Stefan van Beusekom
     * @since 1.0
     */
    public function indexAction() {
        // Retrieve all of the cronjob classes
        $list = $this->getCronClassList();
        $objectList = array();
        foreach ($list as $className) {
            $cronObject = new $className;
            if ($cronObject::CRON_ACTIVE)
                array_push($objectList, $cronObject);
        }

        // Sort the object array based on the priority of the cronjobs
        usort($objectList, function($classA, $classB) {
                    return strcmp($classA::CRON_PRIORITY, $classB::CRON_PRIORITY);
                });

        // Execute the objects, ordered by priority
        foreach ($objectList as $object) {
            $object->execute();
        }
    }

    /**
     * Get a list of all the cron classes currently in the cron folder, and put
     * them into a collective array.
     *
     * @author Stefan van Beusekom
     * @since 1.0
     * @return array Array of available cron classes
     */
    private function getCronClassList() {
        $config = new Zend_Config_Ini(APPLICATION_PATH . '/configs/application.ini', 'production');
        $classPref = $config->get('appnamespace') . "_Model_Cron_";
        $classPath = APPLICATION_PATH . "/models/Cron/";
        $classList = array();

        $dirHandle = opendir($classPath);

        while (false !== ($entry = readdir($dirHandle))) {
            $info = pathinfo($classPath . $entry);
            if (!is_dir($classPath . $entry) && strtolower($info['filename']) != "abstract") {
                $tempClassName = $classPref . $info['filename'];
                array_push($classList, $tempClassName);
            }
        }

        return $classList;
    }

}