/**
 * Hook into the feed content
 * @param type $content
 * @param type $feed_type
 * @return $content
 * @see http://wp.smashingmagazine.com/2011/12/07/10-tips-optimize-wordpress-theme/
 */
function ts_feed_spruce_the_content_feed($content, $feed_type)
{
    global $post;
    /* if (has_post_thumbnail($post->ID) )
    		$content = '<p>' . get_the_post_thumbnail($post->ID, 'thumbnail') . '</p>' . $content; */
    $options = ts_feed_spruce_get_options();
    if ($options['sociallinks']) {
        $content .= '<p class="social-links">';
        $content .= ts_feed_spruce_get_social_links(get_permalink(), get_the_title_rss());
        $content .= '</p>';
    }
    if (!empty($options['append'])) {
        $content .= '<p class="appended">';
        $content .= str_ireplace(array('%id%', '%url%'), array(get_the_ID(), apply_filters('the_permalink_rss', get_permalink())), $options['append']);
        $content .= '</p>';
    }
    return $content;
}
function ts_feed_spruce_option_field_sociallinks()
{
    $options = ts_feed_spruce_get_options();
    $name = 'sociallinks';
    $description = __('Append a band of social sharing buttons to each item.');
    _ts_feed_spruce_option_field_bool($name, $options[$name], $description);
    echo '<br /><div class="social-links-preview image-preview">';
    echo ts_feed_spruce_get_social_links(get_bloginfo('url'), get_bloginfo('name'));
    echo '</div>';
}