<?
if(!class_exists('catchyTitle')) :

    class catchyTitle
    {
        // Add meta box
        public static function metaBox()
        {
            $screen = get_current_screen();
            if('post' != $screen->post_type)
                return;

            add_meta_box('catchy_title', 'Short Title', array('catchyTitle', 'metaBoxShow'), 'post', 'normal', 'high');
        }

        // Show meta box
        public static function metaBoxShow()
        {
            global $post;

            // Use nonce for verification
            wp_nonce_field(plugin_basename( __FILE__ ), 'catchy_title_nonce');

            // Get current value
            $meta = get_post_meta($post->ID, 'catchy_title', true);

            echo '
            <div id="titlewrap">
                <label for="catchy_title" class="">Enter shorter title here</label>
                <input type="text" autocomplete="off" id="catchy_title" value="'.$meta.'" size="20" name="catchy_title">
            </div>';
        }

        // Save the meta data on form post
        public static function saveMeta($postId)
        {
            // Did the user intend to change this value
            if(!isset($_POST['catchy_title_nonce']) || !wp_verify_nonce($_POST['catchy_title_nonce'], plugin_basename( __FILE__ )))
                return;

            // Check autosave
            if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
                return $postId;
            }

            // Check permissions
            if(!current_user_can('edit_post', $postId))
                return $postId;

            $old = get_post_meta($postId, 'catchy_title', true);
            $new = $_POST['catchy_title'];

            if ($new && $new != $old) {
                update_post_meta($postId, 'catchy_title', $new);
            } elseif ('' == $new && $old) {
                delete_post_meta($postId, 'catchy_title', $old);
            }
        }
    }

    if(is_admin())
    {
        add_action('admin_head',  array('catchyTitle', 'metaBox'));
        add_action('save_post', array('catchyTitle', 'saveMeta'));
    }

endif;