<?php

/**

 * Core Navigation Menu API

 *

 * @package WordPress

 * @subpackage Nav_Menus

 * @since 3.0.0

 */

/** Walker_Nav_Menu_Edit class */

require_once( ABSPATH . 'wp-admin/includes/class-walker-nav-menu-edit.php' );

/** Walker_Nav_Menu_Checklist class */

require_once( ABSPATH . 'wp-admin/includes/class-walker-nav-menu-checklist.php' );

/**

 * Prints the appropriate response to a menu quick search.

 *

 * @since 3.0.0

 *

 * @param array $request The unsanitized request values.

 */

function _wp_ajax_menu_quick_search( $request = array() ) {

	$args            = array();

	$type            = isset( $request['type'] ) ? $request['type'] : '';

	$object_type     = isset( $request['object_type'] ) ? $request['object_type'] : '';

	$query           = isset( $request['q'] ) ? $request['q'] : '';

	$response_format = isset( $request['response-format'] ) && in_array( $request['response-format'], array( 'json', 'markup' ) ) ? $request['response-format'] : 'json';

	if ( 'markup' == $response_format ) {

		$args['walker'] = new Walker_Nav_Menu_Checklist;

	}

	if ( 'get-post-item' == $type ) {

		if ( post_type_exists( $object_type ) ) {

			if ( isset( $request['ID'] ) ) {

				$object_id = (int) $request['ID'];

				if ( 'markup' == $response_format ) {

					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_post( $object_id ) ) ), 0, (object) $args );

				} elseif ( 'json' == $response_format ) {

					echo wp_json_encode(

						array(

							'ID'         => $object_id,

							'post_title' => get_the_title( $object_id ),

							'post_type'  => get_post_type( $object_id ),

						)

					);

					echo "\n";

				}

			}

		} elseif ( taxonomy_exists( $object_type ) ) {

			if ( isset( $request['ID'] ) ) {

				$object_id = (int) $request['ID'];

				if ( 'markup' == $response_format ) {

					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_term( $object_id, $object_type ) ) ), 0, (object) $args );

				} elseif ( 'json' == $response_format ) {

					$post_obj = get_term( $object_id, $object_type );

					echo wp_json_encode(

						array(

							'ID'         => $object_id,

							'post_title' => $post_obj->name,

							'post_type'  => $object_type,

						)

					);

					echo "\n";

				}

			}

		}

	} elseif ( preg_match( '/quick-search-(posttype|taxonomy)-([a-zA-Z_-]*\b)/', $type, $matches ) ) {

		if ( 'posttype' == $matches[1] && get_post_type_object( $matches[2] ) ) {

			$post_type_obj = _wp_nav_menu_meta_box_object( get_post_type_object( $matches[2] ) );

			$args          = array_merge(

				$args,

				array(

					'no_found_rows'          => true,

					'update_post_meta_cache' => false,

					'update_post_term_cache' => false,

					'posts_per_page'         => 10,

					'post_type'              => $matches[2],

					's'                      => $query,

				)

			);

			if ( isset( $post_type_obj->_default_query ) ) {

				$args = array_merge( $args, (array) $post_type_obj->_default_query );

			}

			$search_results_query = new WP_Query( $args );

			if ( ! $search_results_query->have_posts() ) {

				return;

			}

			while ( $search_results_query->have_posts() ) {

				$post = $search_results_query->next_post();

				if ( 'markup' == $response_format ) {

					$var_by_ref = $post->ID;

					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_post( $var_by_ref ) ) ), 0, (object) $args );

				} elseif ( 'json' == $response_format ) {

					echo wp_json_encode(

						array(

							'ID'         => $post->ID,

							'post_title' => get_the_title( $post->ID ),

							'post_type'  => $matches[2],

						)

					);

					echo "\n";

				}

			}

		} elseif ( 'taxonomy' == $matches[1] ) {

			$terms = get_terms(

				array(

					'taxonomy'   => $matches[2],

					'name__like' => $query,

					'number'     => 10,

				)

			);

			if ( empty( $terms ) || is_wp_error( $terms ) ) {

				return;

			}

			foreach ( (array) $terms as $term ) {

				if ( 'markup' == $response_format ) {

					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( $term ) ), 0, (object) $args );

				} elseif ( 'json' == $response_format ) {

					echo wp_json_encode(

						array(

							'ID'         => $term->term_id,

							'post_title' => $term->name,

							'post_type'  => $matches[2],

						)

					);

					echo "\n";

				}

			}

		}

	}

}

/**

 * Register nav menu meta boxes and advanced menu items.

 *

 * @since 3.0.0

 */

function wp_nav_menu_setup() {

	// Register meta boxes

	wp_nav_menu_post_type_meta_boxes();

	add_meta_box( 'add-custom-links', __( 'Custom Links' ), 'wp_nav_menu_item_link_meta_box', 'nav-menus', 'side', 'default' );

	wp_nav_menu_taxonomy_meta_boxes();

	// Register advanced menu items (columns)

	add_filter( 'manage_nav-menus_columns', 'wp_nav_menu_manage_columns' );

	// If first time editing, disable advanced items by default.

	if ( false === get_user_option( 'managenav-menuscolumnshidden' ) ) {

		$user = wp_get_current_user();

		update_user_option(

			$user->ID,

			'managenav-menuscolumnshidden',

			array(

				0 => 'link-target',

				1 => 'css-classes',

				2 => 'xfn',

				3 => 'description',

				4 => 'title-attribute',

			),

			true

		);

	}

}

/**

 * Limit the amount of meta boxes to pages, posts, links, and categories for first time users.

 *

 * @since 3.0.0

 *

 * @global array $wp_meta_boxes

 */

function wp_initial_nav_menu_meta_boxes() {

	global $wp_meta_boxes;

	if ( get_user_option( 'metaboxhidden_nav-menus' ) !== false || ! is_array( $wp_meta_boxes ) ) {

		return;

	}

	$initial_meta_boxes = array( 'add-post-type-page', 'add-post-type-post', 'add-custom-links', 'add-category' );

	$hidden_meta_boxes  = array();

	foreach ( array_keys( $wp_meta_boxes['nav-menus'] ) as $context ) {

		foreach ( array_keys( $wp_meta_boxes['nav-menus'][ $context ] ) as $priority ) {

			foreach ( $wp_meta_boxes['nav-menus'][ $context ][ $priority ] as $box ) {

				if ( in_array( $box['id'], $initial_meta_boxes ) ) {

					unset( $box['id'] );

				} else {

					$hidden_meta_boxes[] = $box['id'];

				}

			}

		}

	}

	$user = wp_get_current_user();

	update_user_option( $user->ID, 'metaboxhidden_nav-menus', $hidden_meta_boxes, true );

}

/**

 * Creates meta boxes for any post type menu item..

 *

 * @since 3.0.0

 */

function wp_nav_menu_post_type_meta_boxes() {

	$post_types = get_post_types( array( 'show_in_nav_menus' => true ), 'object' );

	if ( ! $post_types ) {

		return;

	}

	foreach ( $post_types as $post_type ) {

		/**

		 * Filters whether a menu items meta box will be added for the current

		 * object type.

		 *

		 * If a falsey value is returned instead of an object, the menu items

		 * meta box for the current meta box object will not be added.

		 *

		 * @since 3.0.0

		 *

		 * @param object $meta_box_object The current object to add a menu items

		 *                                meta box for.

		 */

		$post_type = apply_filters( 'nav_menu_meta_box_object', $post_type );

		if ( $post_type ) {

			$id = $post_type->name;

			// Give pages a higher priority.

			$priority = ( 'page' == $post_type->name ? 'core' : 'default' );

			add_meta_box( "add-post-type-{$id}", $post_type->labels->name, 'wp_nav_menu_item_post_type_meta_box', 'nav-menus', 'side', $priority, $post_type );

		}

	}

}

/**

 * Creates meta boxes for any taxonomy menu item.

 *

 * @since 3.0.0

 */

function wp_nav_menu_taxonomy_meta_boxes() {

	$taxonomies = get_taxonomies( array( 'show_in_nav_menus' => true ), 'object' );

	if ( ! $taxonomies ) {

		return;

	}

	foreach ( $taxonomies as $tax ) {

		/** This filter is documented in wp-admin/includes/nav-menu.php */

		$tax = apply_filters( 'nav_menu_meta_box_object', $tax );

		if ( $tax ) {

			$id = $tax->name;

			add_meta_box( "add-{$id}", $tax->labels->name, 'wp_nav_menu_item_taxonomy_meta_box', 'nav-menus', 'side', 'default', $tax );

		}

	}

}

/**

 * Check whether to disable the Menu Locations meta box submit button

 *

 * @since 3.6.0

 *

 * @global bool $one_theme_location_no_menus to determine if no menus exist

 *

 * @param int|string $nav_menu_selected_id (id, name or slug) of the currently-selected menu

 * @return string Disabled attribute if at least one menu exists, false if not

 */

function wp_nav_menu_disabled_check( $nav_menu_selected_id ) {

	global $one_theme_location_no_menus;

	if ( $one_theme_location_no_menus ) {

		return false;

	}

	return disabled( $nav_menu_selected_id, 0 );

}

/**

 * Displays a meta box for the custom links menu item.

 *

 * @since 3.0.0

 *

 * @global int        $_nav_menu_placeholder

 * @global int|string $nav_menu_selected_id

 */

function wp_nav_menu_item_link_meta_box() {

	global $_nav_menu_placeholder, $nav_menu_selected_id;

	$_nav_menu_placeholder = 0 > $_nav_menu_placeholder ? $_nav_menu_placeholder - 1 : -1;

	?>

	<div class="customlinkdiv" id="customlinkdiv">

		<input type="hidden" value="custom" name="menu-item[<?php echo $_nav_menu_placeholder; ?>][menu-item-type]" />

		<p id="menu-item-url-wrap" class="wp-clearfix">

			<label class="howto" for="custom-menu-item-url"><?php _e( 'URL' ); ?></label>

			<input id="custom-menu-item-url" name="menu-item[<?php echo $_nav_menu_placeholder; ?>][menu-item-url]" type="text" class="code menu-item-textbox" value="http://" />

		</p>

		<p id="menu-item-name-wrap" class="wp-clearfix">

			<label class="howto" for="custom-menu-item-name"><?php _e( 'Link Text' ); ?></label>

			<input id="custom-menu-item-name" name="menu-item[<?php echo $_nav_menu_placeholder; ?>][menu-item-title]" type="text" class="regular-text menu-item-textbox" />

		</p>

		<p class="button-controls wp-clearfix">

			<span class="add-to-menu">

				<input type="submit"<?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?> class="button submit-add-to-menu right" value="<?php esc_attr_e( 'Add to Menu' ); ?>" name="add-custom-menu-item" id="submit-customlinkdiv" />

				<span class="spinner"></span>

			</span>

		</p>

	</div><!-- /.customlinkdiv -->

	<?php

}

/**

 * Displays a meta box for a post type menu item.

 *

 * @since 3.0.0

 *

 * @global int        $_nav_menu_placeholder

 * @global int|string $nav_menu_selected_id

 *

 * @param string $object Not used.

 * @param array  $box {

 *     Post type menu item meta box arguments.

 *

 *     @type string       $id       Meta box 'id' attribute.

 *     @type string       $title    Meta box title.

 *     @type string       $callback Meta box display callback.

 *     @type WP_Post_Type $args     Extra meta box arguments (the post type object for this meta box).

 * }

 */

function wp_nav_menu_item_post_type_meta_box( $object, $box ) {

	global $_nav_menu_placeholder, $nav_menu_selected_id;

	$post_type_name = $box['args']->name;

	// Paginate browsing for large numbers of post objects.

	$per_page = 50;

	$pagenum  = isset( $_REQUEST[ $post_type_name . '-tab' ] ) && isset( $_REQUEST['paged'] ) ? absint( $_REQUEST['paged'] ) : 1;

	$offset   = 0 < $pagenum ? $per_page * ( $pagenum - 1 ) : 0;

	$args = array(

		'offset'                 => $offset,

		'order'                  => 'ASC',

		'orderby'                => 'title',

		'posts_per_page'         => $per_page,

		'post_type'              => $post_type_name,

		'suppress_filters'       => true,

		'update_post_term_cache' => false,

		'update_post_meta_cache' => false,

	);

	if ( isset( $box['args']->_default_query ) ) {

		$args = array_merge( $args, (array) $box['args']->_default_query );

	}

	// @todo transient caching of these results with proper invalidation on updating of a post of this type

	$get_posts = new WP_Query;

	$posts     = $get_posts->query( $args );

	if ( ! $get_posts->post_count ) {

		echo '<p>' . __( 'No items.' ) . '</p>';

		return;

	}

	$num_pages = $get_posts->max_num_pages;

	$page_links = paginate_links(

		array(

			'base'               => add_query_arg(

				array(

					$post_type_name . '-tab' => 'all',

					'paged'                  => '%#%',

					'item-type'              => 'post_type',

					'item-object'            => $post_type_name,

				)

			),

			'format'             => '',

			'prev_text'          => '<span aria-label="' . esc_attr__( 'Previous page' ) . '">' . __( '&laquo;' ) . '</span>',

			'next_text'          => '<span aria-label="' . esc_attr__( 'Next page' ) . '">' . __( '&raquo;' ) . '</span>',

			'before_page_number' => '<span class="screen-reader-text">' . __( 'Page' ) . '</span> ',

			'total'              => $num_pages,

			'current'            => $pagenum,

		)

	);

	$db_fields = false;

	if ( is_post_type_hierarchical( $post_type_name ) ) {

		$db_fields = array(

			'parent' => 'post_parent',

			'id'     => 'ID',

		);

	}

	$walker = new Walker_Nav_Menu_Checklist( $db_fields );

	$current_tab = 'most-recent';

	if ( isset( $_REQUEST[ $post_type_name . '-tab' ] ) && in_array( $_REQUEST[ $post_type_name . '-tab' ], array( 'all', 'search' ) ) ) {

		$current_tab = $_REQUEST[ $post_type_name . '-tab' ];

	}