<?php

/**

 * Link/Bookmark API

 *

 * @package WordPress

 * @subpackage Bookmark

 */

/**

 * Retrieve Bookmark data

 *

 * @since 2.1.0

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param int|stdClass $bookmark

 * @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which correspond to

 *                       an stdClass object, an associative array, or a numeric array, respectively. Default OBJECT.

 * @param string $filter Optional, default is 'raw'.

 * @return array|object|null Type returned depends on $output value.

 */

	global $wpdb;

			$_bookmark = & $GLOBALS['link'];

			$_bookmark = null;

		$_bookmark = $bookmark;

	} else {

			$_bookmark = & $GLOBALS['link'];

			if ( $_bookmark ) {

				$_bookmark->link_category = array_unique( wp_get_object_terms( $_bookmark->link_id, 'link_category', array( 'fields' => 'ids' ) ) );

				wp_cache_add( $_bookmark->link_id, $_bookmark, 'bookmark' );

			}

		}

	}

		return $_bookmark;

	if ( $output == OBJECT ) {

		return $_bookmark;

	} elseif ( $output == ARRAY_A ) {

	} elseif ( $output == ARRAY_N ) {

	} else {

		return $_bookmark;

	}

}

/**

 * Retrieve single bookmark data item or field.

 *

 * @since 2.3.0

 *

 * @param string $field The name of the data field to return

 * @param int $bookmark The bookmark ID to get field

 * @param string $context Optional. The context of how the field will be used.

 * @return string|WP_Error

 */

function get_bookmark_field( $field, $bookmark, $context = 'display' ) {

	$bookmark = (int) $bookmark;

	$bookmark = get_bookmark( $bookmark );

		return $bookmark;

		return '';

		return '';

}

/**

 * Retrieves the list of bookmarks

 *

 * Attempts to retrieve from the cache first based on MD5 hash of arguments. If

 * that fails, then the query will be built from the arguments and executed. The

 * results will be stored to the cache.

 *

 * @since 2.1.0

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param string|array $args {

 *     Optional. String or array of arguments to retrieve bookmarks.

 *

 *     @type string   $orderby        How to order the links by. Accepts post fields. Default 'name'.

 *     @type string   $order          Whether to order bookmarks in ascending or descending order.

 *                                    Accepts 'ASC' (ascending) or 'DESC' (descending). Default 'ASC'.

 *     @type int      $limit          Amount of bookmarks to display. Accepts 1+ or -1 for all.

 *                                    Default -1.

 *     @type string   $category       Comma-separated list of category ids to include links from.

 *                                    Default empty.

 *     @type string   $category_name  Category to retrieve links for by name. Default empty.

 *     @type int|bool $hide_invisible Whether to show or hide links marked as 'invisible'. Accepts

 *                                    1|true or 0|false. Default 1|true.

 *     @type int|bool $show_updated   Whether to display the time the bookmark was last updated.

 *                                    Accepts 1|true or 0|false. Default 0|false.

 *     @type string   $include        Comma-separated list of bookmark IDs to include. Default empty.

 *     @type string   $exclude        Comma-separated list of bookmark IDs to exclude. Default empty.

 * }

 * @return array List of bookmark row objects.

 */

function get_bookmarks( $args = '' ) {

	global $wpdb;

	$defaults = array(

	);

	$r = wp_parse_args( $args, $defaults );

	$cache = false;

	if ( 'rand' !== $r['orderby'] && $cache = wp_cache_get( 'get_bookmarks', 'bookmark' ) ) {

		if ( is_array( $cache ) && isset( $cache[ $key ] ) ) {

			$bookmarks = $cache[ $key ];

			/**

			 * Filters the returned list of bookmarks.

			 *

			 * The first time the hook is evaluated in this file, it returns the cached

			 * bookmarks list. The second evaluation returns a cached bookmarks list if the

			 * link category is passed but does not exist. The third evaluation returns

			 * the full cached results.

			 *

			 * @since 2.1.0

			 *

			 * @see get_bookmarks()

			 *

			 * @param array $bookmarks List of the cached bookmarks.

			 * @param array $r         An array of bookmark query arguments.

			 */

			return apply_filters( 'get_bookmarks', $bookmarks, $r );

		}

	}

	if ( ! is_array( $cache ) ) {

		$cache = array();

	}

	$inclusions = '';

	if ( ! empty( $r['include'] ) ) {

		$r['category_name'] = '';

		if ( count( $inclinks ) ) {

			foreach ( $inclinks as $inclink ) {

				if ( empty( $inclusions ) ) {

				} else {

				}

			}

		}

	}

		$inclusions .= ')';

	}

	$exclusions = '';

	if ( ! empty( $r['exclude'] ) ) {

		if ( count( $exlinks ) ) {

			foreach ( $exlinks as $exlink ) {

				if ( empty( $exclusions ) ) {

				} else {

				}

			}

		}

	}

	if ( ! empty( $exclusions ) ) {

		$exclusions .= ')';

	}

	if ( ! empty( $r['category_name'] ) ) {

			$r['category'] = $r['category']->term_id;

		} else {

			$cache[ $key ] = array();

			wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );

			/** This filter is documented in wp-includes/bookmark.php */

			return apply_filters( 'get_bookmarks', array(), $r );

		}

	}

	$search = '';

	if ( ! empty( $r['search'] ) ) {

	}

	$category_query = '';

	if ( ! empty( $r['category'] ) ) {

			foreach ( $incategories as $incat ) {

				if ( empty( $category_query ) ) {

				} else {

				}

			}

		}

	}

	if ( ! empty( $category_query ) ) {

		$category_query .= ") AND taxonomy = 'link_category'";

	}

	if ( $r['show_updated'] ) {

	} else {

		$recently_updated_test = '';

	}

	$get_updated = ( $r['show_updated'] ) ? ', UNIX_TIMESTAMP(link_updated) AS link_updated_f ' : '';

	$orderby = strtolower( $r['orderby'] );

	switch ( $orderby ) {

		case 'length':

			break;

		case 'rand':

			$orderby = 'rand()';

			break;

		case 'link_id':

			$orderby = "$wpdb->links.link_id";

			break;

		default:

			$orderparams = array();

			foreach ( explode( ',', $orderby ) as $ordparam ) {

				$ordparam = trim( $ordparam );

				if ( in_array( 'link_' . $ordparam, $keys ) ) {

					$orderparams[] = 'link_' . $ordparam;

				} elseif ( in_array( $ordparam, $keys ) ) {

					$orderparams[] = $ordparam;

				}

			}

			$orderby = implode( ',', $orderparams );

	}

	if ( empty( $orderby ) ) {

		$orderby = 'link_name';

	}

	$order = strtoupper( $r['order'] );

	if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) ) {

		$order = 'ASC';

	}

	$visible = '';

	if ( $r['hide_invisible'] ) {

		$visible = "AND link_visible = 'Y'";

	}

	$query .= " $exclusions $inclusions $search";

	$query .= " ORDER BY $orderby $order";

	if ( $r['limit'] != -1 ) {

		$query .= ' LIMIT ' . $r['limit'];

	}

	$results = $wpdb->get_results( $query );

	if ( 'rand()' !== $orderby ) {

		$cache[ $key ] = $results;

		wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );

	}

	/** This filter is documented in wp-includes/bookmark.php */

	return apply_filters( 'get_bookmarks', $results, $r );

}

/**

 * Sanitizes all bookmark fields

 *

 * @since 2.3.0

 *

 * @param stdClass|array $bookmark Bookmark row

 * @param string $context Optional, default is 'display'. How to filter the

 * @return stdClass|array Same type as $bookmark but with fields sanitized.

 */

		$do_object = true;

	} else {

		$do_object = false;

	}

	foreach ( $fields as $field ) {

		if ( $do_object ) {

		} else {

		}

	}

	return $bookmark;

}

/**

 * Sanitizes a bookmark field.

 *

 * Sanitizes the bookmark fields based on what the field name is. If the field

 * has a strict value set, then it will be tested for that, else a more generic

 * filtering is applied. After the more strict filter is applied, if the `$context`

 * is 'raw' then the value is immediately return.

 *

 * Hooks exist for the more generic cases. With the 'edit' context, the {@see 'edit_$field'}

 * filter will be called and passed the `$value` and `$bookmark_id` respectively.

 *

 * With the 'db' context, the {@see 'pre_$field'} filter is called and passed the value.

 * The 'display' context is the final context and has the `$field` has the filter name

 * and is passed the `$value`, `$bookmark_id`, and `$context`, respectively.

 *

 * @since 2.3.0

 *

 * @param string $field       The bookmark field.

 * @param mixed  $value       The bookmark field value.

 * @param int    $bookmark_id Bookmark ID.

 * @param string $context     How to filter the field value. Accepts 'raw', 'edit', 'attribute',

 *                            'js', 'db', or 'display'

 * @return mixed The filtered value.

 */

function sanitize_bookmark_field( $field, $value, $bookmark_id, $context ) {

	switch ( $field ) {