/**
     * Insert a rendered h-Event list from a VCal feed
     * @param array $atts 
     * @param string $content
     * @return string
     */
    public static function shortcode($atts, $content = "")
    {
        $atts = shortcode_atts(array('url' => '', 'paginated' => '10'), $atts);
        $body = $content;
        $vcal = new ICal();
        // Request VCalendar and cache the response for 7 days
        $vcal->setCache(dirname(__FILE__) . '/cache', 7 * 24 * 3600)->initURL($atts['url']);
        if ($vcal->hasEvents()) {
            ob_start();
            ?>
<div class="icalfeed">
<ul>
<?php 
            foreach ($vcal->events() as $event) {
                $event['DTSTART'] = new \DateTime($event['DTSTART']);
                $event['DTEND'] = new \DateTime($event['DTEND']);
                // Render an event
                ?>
  
        <li class="hevent">
          <p><strong class="p-name"><?php 
                echo $event['SUMMARY'];
                ?>
</strong><br/>
            Du <time class="dt-start" datetime="<?php 
                echo $event['DTSTART']->format(\DateTime::ISO8601);
                ?>
"><?php 
                echo $event['DTSTART']->format('d/m');
                ?>
</time>
            au <time class="dt-end" datetime="<?php 
                echo $event['DTEND']->format(\DateTime::ISO8601);
                ?>
"><?php 
                echo $event['DTEND']->format('d/m');
                ?>
</time><br/>
            <!--span class="p-location">Some bar in SF</span-->
            <?php 
                if (strpos('://', $event['DESCRIPTION'])) {
                    ?>
            <span class="p-summary"><?php 
                    echo preg_replace('#.*(https?://.+)$#is', '<a href="$1" target="icalfeedNewWindow">Voir le site</a>', $event['DESCRIPTION']);
                    ?>
</span>
            <?php 
                }
                ?>
</p>
        </li>
<?php 
            }
            ?>
</ul>
</div>
<?php 
            $body = ob_get_contents();
            ob_clean();
        } else {
            $body = '<p>Aucun événement...</p>';
        }
        return $body;
    }