<?php
/*
Plugin Name: Admin Bar ID Menu
Plugin URI: http://www.tenseg.net/software/adminbarid
Description: Makes the ID number of the current page or post visible in the Admin Bar.
Version: 1.0
Author: Eric Celeste
Author URI: http://eric.clst.org/
License: GNU Lesser GPL 2.1 (http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt)
*/

/*
	History:
	v.1.0: 121212 (efc) made "view" menus show numbers too
	v.0.4: 111216 (efc) added compatibility for new admin bar in 3.3
	v.0.3: 110224 (efc) moved the id into the edit item
	                    appending $wp_admin_bar->menu->edit['title']
	v.0.2: 110224 (efc) moved to a plugin
	                    using the $wp_admin_bar->add_menu method
	v.0.1: 110224 (efc) implemented in theme
*/
 
/*
	Relevant WP core files:
	http://core.trac.wordpress.org/browser/trunk/wp-includes/class-wp-admin-bar.php
	http://core.trac.wordpress.org/browser/trunk/wp-includes/admin-bar.php
	
	Explanation of changes for WP3.3:
	http://wpdevel.wordpress.com/2011/12/07/admin-bar-api-changes-in-3-3/
	
	For future consideration:
	http://codex.wordpress.org/Plugin_API/Action_Reference/wp_before_admin_bar_render	
*/

// note that this action will fire late, 
// after $wp_admin_bar has been populated
add_action( 'admin_bar_menu', 'efc_admin_bar_menu', 95 );

function efc_admin_bar_menu() {
	global $wp_admin_bar;
	global $wp_version;
	global $post;
	
	
	$current_object = get_queried_object();
	
	// IDs live in different places for posts or taxonomy items, why?
	if (! empty ( $current_object->post_type ) ) {
		$id = $current_object->ID;
	} elseif (! empty ( $current_object->taxonomy ) ) {
		$id = $current_object->term_id;
	} elseif (! empty ( $post )) {
		$id = $post->ID;
	} elseif (! empty ( $_GET['tag_ID']) ) {
		$id = $_GET['tag_ID'];
	}else {
		$id = "";
	}
	
	// error_log('nodes ['.implode('][',array_keys($wp_admin_bar->get_nodes())).']'); // for debugging
	
	// update the menu title, which is a different process before and after WP 3.3
	if ( $wp_version >= 3.3 ) {
	
		if ( is_object($node = $wp_admin_bar->get_node('edit')) ) {
			$wp_admin_bar->add_node( array(
				'id' => 'edit',
				'title' => $node->title . " $id",
			) );
		}
		if ( is_object($node = $wp_admin_bar->get_node('view')) ) {
			$wp_admin_bar->add_node( array(
				'id' => 'view',
				'title' => $node->title . " $id",
			) );
		}

	} else {

		if( is_array($wp_admin_bar->menu->edit) && $id ) { // is there an edit menu?
			$wp_admin_bar->menu->edit['title'] .= " $id"; // then append the id
		}
	
	}
}