<?php
/**
 * Wombat Mail Newsletter
 *
 * @author gERD Schaufelberger <gerd@exit0.net>
 * @license PHP License
 * @package WB
 * @subpackage MailMime
 */

WBClass::load('WBDatasource_Newsletter'
    , 'WBString'
    , 'patI18n');

/**
 * Wombat Mail Newsletter
 *
 * @version 0.1.0
 * @package WB
 * @subpackage MailMime
 */
class WBMail_Newsletter extends WBStdClass
{
    /**
     * Mime Mailer
     * @var WBMail_Mime
     */
    private $mailMime;

    /**
     * Template Engine
     * @var patTemplate
     */
    private $tmpl;

    /**
     * Newsletter Issue
     * @var WBDatasource_Newsletter_Issue
     */
    private $issue;

    /**
     * Subscriber Data
     * @var array
     */
    private $sub;

    /**
     * Current Locale Settings
     * @var string
     */
    private $langCurrent;

    /**
     * Standard Constructor
     *
     * @param array
     */
    public function __construct($parameter = array())
    {
        $this->langCurrent  =   patI18n::getLocale(patI18n::LOCALE_TYPE_COMPLETE);
        $this->tmpl         =   WBClass::create('patTemplate');
        $this->mailMime     =   WBClass::create('WBMail_Mime');
    }

    /**
     * Tell Which Newsletter Issue 2 Mail
     *
     * Set issue object
     * @param WBDatasource_Newsletter_Issue
     */
    public function setIssue(WBDatasource_Newsletter_Issue $issue)
    {
        $this->issue    =   $issue;
    }

    /**
     * Set Subscriber Data As Recipient
     *
     * Data must contain:
     *  - email
     *  - forename (may be empty)
     *  - surname (may be empty)
     * @param array
     */
    public function setSubscriberData($data)
    {
        $this->sub  =   $data;
    }

    /**
     * Prepare Content and Header
     *
     * Setup e-mail recipient and from address. Also load e-mail templates and
     * fill placeholders with content from issue and articles
     */
    public function prepare()
    {
        $this->setLocale();

        $issue  =   $this->issue->get();
        // $this->mailMime->setDate(strtotime($issue['created']));

        $from       =   $this->issue->getConfig('from');
        /** @var WBMail_Mime_Part_Address */
        $addrFrom   =   WBClass::create('WBMail_Mime_Part_Address');
        $addrFrom->setForename($from['forename']);
        $addrFrom->setSurname($from['surname']);
        $addrFrom->setEmailAddress($from['email']);
        $this->mailMime->setFrom($addrFrom);

        /** @var WBMail_Mime_Part_Address */
        $addrRcpt   =   WBClass::create('WBMail_Mime_Part_Address');
        $addrRcpt->setForename($this->sub['forename']);
        $addrRcpt->setSurname($this->sub['surname']);
        $addrRcpt->setEmailAddress($this->sub['email']);
        $this->mailMime->setRcpt($addrRcpt);

        $this->tmpl->clearAllTemplates();

        // add locale settings
        $lang   =   array(
            'short'     =>  patI18n::getLocale(patI18n::LOCALE_TYPE_SHORT),
            'lang'      =>  patI18n::getLocale(patI18n::LOCALE_TYPE_LANG),
            'complete'  =>  patI18n::getLocale(patI18n::LOCALE_TYPE_COMPLETE)
            );
        $this->tmpl->addGlobalVars($lang, 'LOCALE_LANG_');
        $this->tmpl->readTemplatesFromInput('Newsletter/Issue/' . $issue['template'] . '.tmpl');

        // add CSS-Template
        $css    =   array();
        $list   =   $this->tmpl->getList();
        foreach ($list as $name) {
            if (0 != strncmp('css_', $name, 4)) {
                continue;
            }
            $name   =   substr($name, 4);
            $css[$name] =   trim($this->tmpl->getParsedTemplate('css_' . $name));
        }

        $this->tmpl->addGlobalVars($css, 'css_');
        $this->tmpl->addGlobalVars($issue, 'issue_');
        $this->tmpl->addGlobalVars($this->sub, 'sub_');

        $art    =   $this->issue->getArticle();
        $this->tmpl->addGlobalVar('article_count', count($art));
        if ($this->tmpl->exists('article_list_entry_html')) {
            $this->tmpl->addRows('article_list_entry_html', $art);
        }
        if ($this->tmpl->exists('article_list_entry_plain')) {
            $this->tmpl->addRows('article_list_entry_plain', $art);
        }

        $this->resetLocale();
    }

    /**
     * Get E-Mail Subject
     *
     * @return string
     */
    public function getSubject()
    {
        $this->setLocale();
        $subject    =   trim($this->tmpl->getParsedTemplate('email_subject'));
        $subject    =   $this->replaceSubscriberInfo($subject);
        $subject    =   str_replace("\n", ' ', $subject);
        $subject    =   WBString::replaceSuperPlaceholders($subject);
        $this->resetLocale();
        return $subject;
    }

    /**
     * Get E-Mail Plain Body
     *
     * @return string
     */
    public function getPlainBody()
    {
        $this->setLocale();
        $txt    =   $this->tmpl->getParsedTemplate('email_plain');
        $txt    =   $this->replaceSubscriberInfo($txt);
        $txt    =   WBString::replaceSuperPlaceholders($txt);
        $this->resetLocale();
        return $txt;
    }

    /**
     * Get E-Mail HTML Body
     *
     * @return string
     */
    public function getHtmlBody($doc = false)
    {
        $this->setLocale();
        if ($doc) {
            $html   =   $this->tmpl->getParsedTemplate('email_html_doc');
        }
        else {
            $html   =   $this->tmpl->getParsedTemplate('email_html');
        }
        $html   =   $this->replaceSubscriberInfo($html);
        $html   =   WBString::replaceSuperPlaceholders($html);;
        $this->resetLocale();
        return $html;
    }

    /**
     * Replace String with Subscriber's Data
     *
     * @todo consider to replace more data
     * @param string
     * @return string
     */
    private function replaceSubscriberInfo($txt)
    {
        $search     =   array();
        $search[]   =   'OBSCUREID';
        $replace    =   array();
        $replace[]  =   $this->sub['obscureid'];
        return str_replace($search, $replace, $txt);
    }

    /**
     * Get Complete E-Mail body
     *
     * Return Mime-Mail string ready to be send
     * Also pass e-mail headers using reference header parameter
     *
     * @param array $headers
     * @return string
     */
    public function getMailBody(&$header = array())
    {
        $mm =   $this->getMimeMail();

        /** @var WBMail_Mime_Storage_String */
        $ms =   WBClass::create('WBMail_Mime_Storage_String');
        $ms->setMimeMail($mm);

        $header =   array();
        return $ms->saveToString($header);
    }

    /**
     * Get Prepared Mime Mail
     *
     * @return WBMail_Mime
     */
    public function getMimeMail()
    {
        // subject must be one line!
        $this->mailMime->setSubject($this->getSubject());

        // body
        $this->mailMime->setPlainBody($this->getPlainBody());
        $this->mailMime->setHtmlBody($this->getHtmlBody(true));

        return $this->mailMime;
    }


    /**
     * Set Locale
     *
     * Set current locale config to newsletter issue's language setting
     */
    private function setLocale()
    {
        // switch to recipient's language first
        $this->langCurrent  =   patI18n::getLocale(patI18n::LOCALE_TYPE_COMPLETE);
        $lang               =   $this->issue->getLang();
        if (!empty($lang)) {
            patI18n::setLocale($lang);
        }
    }

    /**
     * Restore Locale Settings
     *
     * @see setLocale()
     */
    private function resetLocale()
    {
        // undo changes in locale settings
        patI18n::setLocale($this->langCurrent);
    }
}