<?php
/**
 * patTemplate modfifier Newsletterissue
 *
 * @package wombat
 * @subpackage patTemplate
 * @author gERD Schaufelberger <gerd@php-tools.net>
 */

/**
 * patTemplate modfifier Newsletterissue
 *
 * @version 0.1.0
 */
class patTemplate_Modifier_Newsletterissue extends patTemplate_Modifier
{
    /**
     * @var WBDatasource_Newsletter_Issue
     */
    static $issue;
    /**
     * @var WBDatasource_Newsletter_Receiver
     */
    static $rcpt;

    /**
     * Get Issue instance
     *
     * @return WBDatasource_Newsletter_Issue
     */
    private function getIssue($id)
    {
        if (empty(self::$issue)) {
            self::$issue    =   WBClass::create('WBDatasource_Newsletter_Issue');
        }

        self::$issue->load($id);
        return self::$issue;
    }

    /**
     * Get Rcpts
     *
     * @return WBDatasource_Newsletter_Receiver
     */
    private function getRcpt()
    {
        if (empty(self::$rcpt)) {
            self::$rcpt =   WBClass::create('WBDatasource_Newsletter_Receiver');
            self::$rcpt->useLang(true);
        }

        return self::$rcpt;
    }

    /**
     * Modify Value
     *
     * @param string value
     * @param array attributes
     * @return string modified value
     */
    public function modify($value, $params = array())
    {
        if (empty($value)) {
            return 0;
        }

        $defParams  =   array(
                                'count'     =>  '',
                                'display'   =>  '',
                                );
        $params =   array_merge($defParams, $params);

        $iss    =   $this->getIssue($value);
        $sent   =   $iss->getSentDate();
        $top    =   $iss->getTopic();

        switch ($params['count']) {
            case 'topic':
                return count($top);
                break;

            case 'rcpt':
                // potential recipients
                if (empty($sent)) {
                    $rcpt   =   $this->getRcpt();
                    $rcpt->setIssue($iss);
                    $rcpt->setLang($iss->getLang());
                    $rcpt->useTopic($top);
                    return $rcpt->count();
                }

                // actual recipients
                return $iss->countRcpt();
                break;

            default:
                break;
        }

        switch ($params['display']) {
            case 'topic':
                $tmp    =   array();
                foreach ($top as $t) {
                    $tmp[]  =   strip_tags($t['title']);
                }

                return implode(', ', $tmp);
                break;

            default:
                break;
        }
        return 0;
    }
}