<?php
/**
 * String DateFormatter
 *
 * @author gERD Schaufelberger <gerd@schaufelberger.de>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

/**
 * String DateFormatter
 *
 * Helper to get international date formatter
 *
 * @version 0.2.0
 * @package WB
 * @subpackage base
 */
class WBString_DateFormatter extends WBStdClass
{
    /**
     * Configured Timezone
     * @var DateTimeZone
     */
    static private $timezone;

    /**
     * Current Format Pattern
     */
    private $pattern    =   'd. MMM yyyy';

    /**
     * Set Current Timezone String
     *
     * @param string
     * @return WBString_DateFormatter
     */
    public function setTimeZone($timezone)
    {
        self::$timezone =   new DateTimeZone($timezone);
        return $this;
    }

    /**
     * Get Time Zone String
     *
     * @param bool true for locale timezone, false for UTC
     * @return string
     */
    public function getTimeZone($local = false)
    {
        if (!$local) {
            return 'UTC';
        }

        $conf   =   WBClass::create('WBConfig');
        $conf->load('locale');
        return $conf->get('locale/timezone', 'UTC');
    }

    /**
     * Set Format Pattern
     *
     * @param string pattern
     * @return WBString_DateFormatter
     */
    public function setPattern($pattern)
    {
        $this->pattern  =   $pattern;
        return $this;
    }

    /**
     * Format Timestamp
     *
     * @param string timestamp
     * @return string
     */
    public function format($timestamp)
    {
        $this->initTimezone();

        // support for international formats like Sunday is Sonntag in German...
        $fmt    =    new IntlDateFormatter(patI18n::getLocale(), IntlDateFormatter::FULL, IntlDateFormatter::FULL, self::$timezone);
        $fmt->setPattern($this->pattern);
        return $fmt->format($timestamp);
    }

    /**
     * Load Timezone Once
     *
     *
     */
    private function initTimezone()
    {
        if (!empty(self::$timezone)) {
            return ;
        }
        $this->setTimezone($this->getTimeZone());
    }
}