<?php

/**

 * Build Administration Menu.

 *

 * @package WordPress

 * @subpackage Administration

 */

if ( is_network_admin() ) {

	/**

	 * Fires before the administration menu loads in the Network Admin.

	 *

	 * The hook fires before menus and sub-menus are removed based on user privileges.

	 *

	 * @private

	 * @since 3.1.0

	 */

	do_action( '_network_admin_menu' );

} elseif ( is_user_admin() ) {

	/**

	 * Fires before the administration menu loads in the User Admin.

	 *

	 * The hook fires before menus and sub-menus are removed based on user privileges.

	 *

	 * @private

	 * @since 3.1.0

	 */

	do_action( '_user_admin_menu' );

} else {

	/**

	 * Fires before the administration menu loads in the admin.

	 *

	 * The hook fires before menus and sub-menus are removed based on user privileges.

	 *

	 * @private

	 * @since 2.2.0

	 */

	do_action( '_admin_menu' );

}

// Create list of page plugin hook names.

foreach ($menu as $menu_page) {

	if ( false !== $pos = strpos($menu_page[2], '?') ) {

		// Handle post_type=post|page|foo pages.

		$hook_name = substr($menu_page[2], 0, $pos);

		$hook_args = substr($menu_page[2], $pos + 1);

		wp_parse_str($hook_args, $hook_args);

		// Set the hook name to be the post type.

		if ( isset($hook_args['post_type']) )

			$hook_name = $hook_args['post_type'];

		else

			$hook_name = basename($hook_name, '.php');

		unset($hook_args);

	} else {

		$hook_name = basename($menu_page[2], '.php');

	}

	$hook_name = sanitize_title($hook_name);

	if ( isset($compat[$hook_name]) )

		$hook_name = $compat[$hook_name];

	elseif ( !$hook_name )

		continue;

	$admin_page_hooks[$menu_page[2]] = $hook_name;

}

unset($menu_page, $compat);

$_wp_submenu_nopriv = array();

$_wp_menu_nopriv = array();

// Loop over submenus and remove pages for which the user does not have privs.

foreach ($submenu as $parent => $sub) {

	foreach ($sub as $index => $data) {

		if ( ! current_user_can($data[1]) ) {

			unset($submenu[$parent][$index]);

			$_wp_submenu_nopriv[$parent][$data[2]] = true;

		}

	}

	unset($index, $data);

	if ( empty($submenu[$parent]) )

		unset($submenu[$parent]);

}

unset($sub, $parent);

/*

 * Loop over the top-level menu.

 * Menus for which the original parent is not accessible due to lack of privileges

 * will have the next submenu in line be assigned as the new menu parent.

 */

foreach ( $menu as $id => $data ) {

	if ( empty($submenu[$data[2]]) )

		continue;

	$subs = $submenu[$data[2]];

	$first_sub = reset( $subs );

	$old_parent = $data[2];

	$new_parent = $first_sub[2];

	/*

	 * If the first submenu is not the same as the assigned parent,

	 * make the first submenu the new parent.

	 */

	if ( $new_parent != $old_parent ) {

		$_wp_real_parent_file[$old_parent] = $new_parent;

		$menu[$id][2] = $new_parent;

		foreach ($submenu[$old_parent] as $index => $data) {

			$submenu[$new_parent][$index] = $submenu[$old_parent][$index];

			unset($submenu[$old_parent][$index]);

		}

		unset($submenu[$old_parent], $index);

		if ( isset($_wp_submenu_nopriv[$old_parent]) )

			$_wp_submenu_nopriv[$new_parent] = $_wp_submenu_nopriv[$old_parent];

	}

}

unset($id, $data, $subs, $first_sub, $old_parent, $new_parent);

if ( is_network_admin() ) {

	/**

	 * Fires before the administration menu loads in the Network Admin.

	 *

	 * @since 3.1.0

	 *

	 * @param string $context Empty context.

	 */

	do_action( 'network_admin_menu', '' );

} elseif ( is_user_admin() ) {

	/**

	 * Fires before the administration menu loads in the User Admin.

	 *

	 * @since 3.1.0

	 *

	 * @param string $context Empty context.

	 */

	do_action( 'user_admin_menu', '' );

} else {

	/**

	 * Fires before the administration menu loads in the admin.

	 *

	 * @since 1.5.0

	 *

	 * @param string $context Empty context.

	 */

	do_action( 'admin_menu', '' );

}

/*

 * Remove menus that have no accessible submenus and require privileges

 * that the user does not have. Run re-parent loop again.

 */

foreach ( $menu as $id => $data ) {

	if ( ! current_user_can($data[1]) )

		$_wp_menu_nopriv[$data[2]] = true;

	/*

	 * If there is only one submenu and it is has same destination as the parent,

	 * remove the submenu.

	 */

	if ( ! empty( $submenu[$data[2]] ) && 1 == count ( $submenu[$data[2]] ) ) {

		$subs = $submenu[$data[2]];

		$first_sub = reset( $subs );

		if ( $data[2] == $first_sub[2] )

			unset( $submenu[$data[2]] );

	}

	// If submenu is empty...

	if ( empty($submenu[$data[2]]) ) {

		// And user doesn't have privs, remove menu.

		if ( isset( $_wp_menu_nopriv[$data[2]] ) ) {

			unset($menu[$id]);

		}

	}

}

unset($id, $data, $subs, $first_sub);

function add_cssclass($add, $class) {

	$class = empty($class) ? $add : $class .= ' ' . $add;

	return $class;

}

function add_menu_classes($menu) {

	$first = $lastorder = false;

	$i = 0;

	$mc = count($menu);

	foreach ( $menu as $order => $top ) {

		$i++;

		if ( 0 == $order ) { // dashboard is always shown/single

			$menu[0][4] = add_cssclass('menu-top-first', $top[4]);

			$lastorder = 0;

			continue;

		}

		if ( 0 === strpos($top[2], 'separator') && false !== $lastorder ) { // if separator

			$first = true;

			$c = $menu[$lastorder][4];

			$menu[$lastorder][4] = add_cssclass('menu-top-last', $c);

			continue;

		}

		if ( $first ) {

			$c = $menu[$order][4];

			$menu[$order][4] = add_cssclass('menu-top-first', $c);

			$first = false;

		}

		if ( $mc == $i ) { // last item

			$c = $menu[$order][4];

			$menu[$order][4] = add_cssclass('menu-top-last', $c);

		}

		$lastorder = $order;

	}

	/**

	 *

	 * @since 2.7.0

	 *

	 * @param array $menu Associative array of administration menu items.

	 */

	return apply_filters( 'add_menu_classes', $menu );

}

uksort($menu, "strnatcasecmp"); // make it all pretty

/**

 *

 *

 * @since 2.8.0

 *

 * @param bool $custom Whether custom ordering is enabled. Default false.

 */

if ( apply_filters( 'custom_menu_order', false ) ) {

	$menu_order = array();

	foreach ( $menu as $menu_item ) {

		$menu_order[] = $menu_item[2];

	}

	unset($menu_item);

	$default_menu_order = $menu_order;

	/**

	 *

	 * for this filter to work. Use the following to enable custom menu ordering:

	 *

	 *     add_filter( 'custom_menu_order', '__return_true' );

	 *

	 * @since 2.8.0

	 *

	 * @param array $menu_order An ordered array of menu items.

	 */

	$menu_order = apply_filters( 'menu_order', $menu_order );

	$menu_order = array_flip($menu_order);

	$default_menu_order = array_flip($default_menu_order);

	function sort_menu($a, $b) {

		global $menu_order, $default_menu_order;

		$a = $a[2];

		$b = $b[2];

		if ( isset($menu_order[$a]) && !isset($menu_order[$b]) ) {

			return -1;

		} elseif ( !isset($menu_order[$a]) && isset($menu_order[$b]) ) {

			return 1;

		} elseif ( isset($menu_order[$a]) && isset($menu_order[$b]) ) {

			if ( $menu_order[$a] == $menu_order[$b] )

				return 0;

			return ($menu_order[$a] < $menu_order[$b]) ? -1 : 1;

		} else {

			return ($default_menu_order[$a] <= $default_menu_order[$b]) ? -1 : 1;

		}

	}

	usort($menu, 'sort_menu');

	unset($menu_order, $default_menu_order);

}

// Remove the last menu item if it is a separator.

$last_menu_key = array_keys( $menu );

$last_menu_key = array_pop( $last_menu_key );

if ( !empty( $menu ) && 'wp-menu-separator' == $menu[ $last_menu_key ][ 4 ] )

	unset( $menu[ $last_menu_key ] );

unset( $last_menu_key );

if ( !user_can_access_admin_page() ) {

	/**

	 * Fires when access to an admin page is denied.

	 *

	 * @since 2.5.0

	 */

	do_action( 'admin_page_access_denied' );

}

$menu = add_menu_classes($menu);