421 lines
13 KiB
PHP
421 lines
13 KiB
PHP
<?php
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/**
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* Link/Bookmark API
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*
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* @package WordPress
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* @subpackage Bookmark
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*/
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/**
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* Retrieve Bookmark data
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*
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* @since 2.1.0
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param int|stdClass $bookmark
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* @param string $output Optional. Either OBJECT, ARRAY_N, or ARRAY_A constant
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* @param string $filter Optional, default is 'raw'.
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* @return array|object|null Type returned depends on $output value.
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*/
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function get_bookmark($bookmark, $output = OBJECT, $filter = 'raw') {
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global $wpdb;
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if ( empty($bookmark) ) {
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if ( isset($GLOBALS['link']) )
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$_bookmark = & $GLOBALS['link'];
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else
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$_bookmark = null;
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} elseif ( is_object($bookmark) ) {
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wp_cache_add($bookmark->link_id, $bookmark, 'bookmark');
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$_bookmark = $bookmark;
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} else {
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if ( isset($GLOBALS['link']) && ($GLOBALS['link']->link_id == $bookmark) ) {
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$_bookmark = & $GLOBALS['link'];
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} elseif ( ! $_bookmark = wp_cache_get($bookmark, 'bookmark') ) {
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$_bookmark = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->links WHERE link_id = %d LIMIT 1", $bookmark));
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if ( $_bookmark ) {
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$_bookmark->link_category = array_unique( wp_get_object_terms( $_bookmark->link_id, 'link_category', array( 'fields' => 'ids' ) ) );
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wp_cache_add( $_bookmark->link_id, $_bookmark, 'bookmark' );
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}
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}
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}
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if ( ! $_bookmark )
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return $_bookmark;
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$_bookmark = sanitize_bookmark($_bookmark, $filter);
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if ( $output == OBJECT ) {
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return $_bookmark;
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} elseif ( $output == ARRAY_A ) {
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return get_object_vars($_bookmark);
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} elseif ( $output == ARRAY_N ) {
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return array_values(get_object_vars($_bookmark));
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} else {
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return $_bookmark;
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}
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}
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/**
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* Retrieve single bookmark data item or field.
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*
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* @since 2.3.0
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*
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* @param string $field The name of the data field to return
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* @param int $bookmark The bookmark ID to get field
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* @param string $context Optional. The context of how the field will be used.
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* @return string|WP_Error
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*/
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function get_bookmark_field( $field, $bookmark, $context = 'display' ) {
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$bookmark = (int) $bookmark;
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$bookmark = get_bookmark( $bookmark );
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if ( is_wp_error($bookmark) )
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return $bookmark;
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if ( !is_object($bookmark) )
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return '';
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if ( !isset($bookmark->$field) )
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return '';
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return sanitize_bookmark_field($field, $bookmark->$field, $bookmark->link_id, $context);
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}
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/**
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* Retrieves the list of bookmarks
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*
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* Attempts to retrieve from the cache first based on MD5 hash of arguments. If
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* that fails, then the query will be built from the arguments and executed. The
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* results will be stored to the cache.
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*
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* @since 2.1.0
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param string|array $args {
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* Optional. String or array of arguments to retrieve bookmarks.
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*
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* @type string $orderby How to order the links by. Accepts post fields. Default 'name'.
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* @type string $order Whether to order bookmarks in ascending or descending order.
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* Accepts 'ASC' (ascending) or 'DESC' (descending). Default 'ASC'.
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* @type int $limit Amount of bookmarks to display. Accepts 1+ or -1 for all.
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* Default -1.
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* @type string $category Comma-separated list of category ids to include links from.
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* Default empty.
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* @type string $category_name Category to retrieve links for by name. Default empty.
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* @type int|bool $hide_invisible Whether to show or hide links marked as 'invisible'. Accepts
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* 1|true or 0|false. Default 1|true.
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* @type int|bool $show_updated Whether to display the time the bookmark was last updated.
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* Accepts 1|true or 0|false. Default 0|false.
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* @type string $include Comma-separated list of bookmark IDs to include. Default empty.
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* @type string $exclude Comma-separated list of bookmark IDs to exclude. Default empty.
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* }
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* @return array List of bookmark row objects.
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*/
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function get_bookmarks( $args = '' ) {
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global $wpdb;
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$defaults = array(
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'orderby' => 'name', 'order' => 'ASC',
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'limit' => -1, 'category' => '',
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'category_name' => '', 'hide_invisible' => 1,
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'show_updated' => 0, 'include' => '',
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'exclude' => '', 'search' => ''
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);
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$r = wp_parse_args( $args, $defaults );
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$key = md5( serialize( $r ) );
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$cache = false;
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if ( 'rand' !== $r['orderby'] && $cache = wp_cache_get( 'get_bookmarks', 'bookmark' ) ) {
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if ( is_array( $cache ) && isset( $cache[ $key ] ) ) {
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$bookmarks = $cache[ $key ];
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/**
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* Filters the returned list of bookmarks.
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*
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* The first time the hook is evaluated in this file, it returns the cached
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* bookmarks list. The second evaluation returns a cached bookmarks list if the
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* link category is passed but does not exist. The third evaluation returns
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* the full cached results.
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*
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* @since 2.1.0
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*
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* @see get_bookmarks()
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*
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* @param array $bookmarks List of the cached bookmarks.
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* @param array $r An array of bookmark query arguments.
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*/
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return apply_filters( 'get_bookmarks', $bookmarks, $r );
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}
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}
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if ( ! is_array( $cache ) ) {
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$cache = array();
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}
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$inclusions = '';
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if ( ! empty( $r['include'] ) ) {
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$r['exclude'] = ''; //ignore exclude, category, and category_name params if using include
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$r['category'] = '';
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$r['category_name'] = '';
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$inclinks = preg_split( '/[\s,]+/', $r['include'] );
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if ( count( $inclinks ) ) {
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foreach ( $inclinks as $inclink ) {
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if ( empty( $inclusions ) ) {
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$inclusions = ' AND ( link_id = ' . intval( $inclink ) . ' ';
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} else {
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$inclusions .= ' OR link_id = ' . intval( $inclink ) . ' ';
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}
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}
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}
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}
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if (! empty( $inclusions ) ) {
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$inclusions .= ')';
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}
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$exclusions = '';
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if ( ! empty( $r['exclude'] ) ) {
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$exlinks = preg_split( '/[\s,]+/', $r['exclude'] );
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if ( count( $exlinks ) ) {
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foreach ( $exlinks as $exlink ) {
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if ( empty( $exclusions ) ) {
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$exclusions = ' AND ( link_id <> ' . intval( $exlink ) . ' ';
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} else {
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$exclusions .= ' AND link_id <> ' . intval( $exlink ) . ' ';
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}
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}
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}
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}
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if ( ! empty( $exclusions ) ) {
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$exclusions .= ')';
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}
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if ( ! empty( $r['category_name'] ) ) {
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if ( $r['category'] = get_term_by('name', $r['category_name'], 'link_category') ) {
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$r['category'] = $r['category']->term_id;
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} else {
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$cache[ $key ] = array();
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wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );
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/** This filter is documented in wp-includes/bookmark.php */
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return apply_filters( 'get_bookmarks', array(), $r );
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}
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}
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$search = '';
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if ( ! empty( $r['search'] ) ) {
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$like = '%' . $wpdb->esc_like( $r['search'] ) . '%';
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$search = $wpdb->prepare(" AND ( (link_url LIKE %s) OR (link_name LIKE %s) OR (link_description LIKE %s) ) ", $like, $like, $like );
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}
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$category_query = '';
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$join = '';
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if ( ! empty( $r['category'] ) ) {
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$incategories = preg_split( '/[\s,]+/', $r['category'] );
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if ( count($incategories) ) {
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foreach ( $incategories as $incat ) {
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if ( empty( $category_query ) ) {
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$category_query = ' AND ( tt.term_id = ' . intval( $incat ) . ' ';
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} else {
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$category_query .= ' OR tt.term_id = ' . intval( $incat ) . ' ';
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}
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}
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}
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}
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if ( ! empty( $category_query ) ) {
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$category_query .= ") AND taxonomy = 'link_category'";
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$join = " INNER JOIN $wpdb->term_relationships AS tr ON ($wpdb->links.link_id = tr.object_id) INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_taxonomy_id = tr.term_taxonomy_id";
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}
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if ( $r['show_updated'] ) {
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$recently_updated_test = ", IF (DATE_ADD(link_updated, INTERVAL 120 MINUTE) >= NOW(), 1,0) as recently_updated ";
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} else {
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$recently_updated_test = '';
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}
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$get_updated = ( $r['show_updated'] ) ? ', UNIX_TIMESTAMP(link_updated) AS link_updated_f ' : '';
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$orderby = strtolower( $r['orderby'] );
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$length = '';
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switch ( $orderby ) {
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case 'length':
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$length = ", CHAR_LENGTH(link_name) AS length";
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break;
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case 'rand':
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$orderby = 'rand()';
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break;
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case 'link_id':
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$orderby = "$wpdb->links.link_id";
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break;
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default:
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$orderparams = array();
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$keys = array( 'link_id', 'link_name', 'link_url', 'link_visible', 'link_rating', 'link_owner', 'link_updated', 'link_notes', 'link_description' );
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foreach ( explode( ',', $orderby ) as $ordparam ) {
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$ordparam = trim( $ordparam );
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if ( in_array( 'link_' . $ordparam, $keys ) ) {
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$orderparams[] = 'link_' . $ordparam;
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} elseif ( in_array( $ordparam, $keys ) ) {
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$orderparams[] = $ordparam;
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}
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}
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$orderby = implode( ',', $orderparams );
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}
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if ( empty( $orderby ) ) {
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$orderby = 'link_name';
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}
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$order = strtoupper( $r['order'] );
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if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) ) {
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$order = 'ASC';
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}
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$visible = '';
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if ( $r['hide_invisible'] ) {
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$visible = "AND link_visible = 'Y'";
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}
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$query = "SELECT * $length $recently_updated_test $get_updated FROM $wpdb->links $join WHERE 1=1 $visible $category_query";
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$query .= " $exclusions $inclusions $search";
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$query .= " ORDER BY $orderby $order";
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if ( $r['limit'] != -1 ) {
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$query .= ' LIMIT ' . $r['limit'];
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}
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$results = $wpdb->get_results( $query );
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if ( 'rand()' !== $orderby ) {
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$cache[ $key ] = $results;
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wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );
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}
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/** This filter is documented in wp-includes/bookmark.php */
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return apply_filters( 'get_bookmarks', $results, $r );
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}
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/**
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* Sanitizes all bookmark fields
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*
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* @since 2.3.0
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*
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* @param object|array $bookmark Bookmark row
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* @param string $context Optional, default is 'display'. How to filter the
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* fields
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* @return object|array Same type as $bookmark but with fields sanitized.
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*/
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function sanitize_bookmark($bookmark, $context = 'display') {
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$fields = array('link_id', 'link_url', 'link_name', 'link_image', 'link_target', 'link_category',
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'link_description', 'link_visible', 'link_owner', 'link_rating', 'link_updated',
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'link_rel', 'link_notes', 'link_rss', );
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if ( is_object($bookmark) ) {
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$do_object = true;
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$link_id = $bookmark->link_id;
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} else {
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$do_object = false;
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$link_id = $bookmark['link_id'];
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}
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foreach ( $fields as $field ) {
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if ( $do_object ) {
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if ( isset($bookmark->$field) )
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$bookmark->$field = sanitize_bookmark_field($field, $bookmark->$field, $link_id, $context);
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} else {
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if ( isset($bookmark[$field]) )
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$bookmark[$field] = sanitize_bookmark_field($field, $bookmark[$field], $link_id, $context);
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}
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}
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return $bookmark;
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}
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/**
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* Sanitizes a bookmark field.
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*
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* Sanitizes the bookmark fields based on what the field name is. If the field
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* has a strict value set, then it will be tested for that, else a more generic
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* filtering is applied. After the more strict filter is applied, if the
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* $context is 'raw' then the value is immediately return.
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*
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* Hooks exist for the more generic cases. With the 'edit' context, the
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* {@see 'edit_$field'} filter will be called and passed the `$value` and `$bookmark_id`
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* respectively. With the 'db' context, the {@see 'pre_$field'} filter is called and
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* passed the value. The 'display' context is the final context and has the
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* `$field` has the filter name and is passed the `$value`, `$bookmark_id`, and
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* `$context`, respectively.
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*
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* @since 2.3.0
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*
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* @param string $field The bookmark field
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* @param mixed $value The bookmark field value
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* @param int $bookmark_id Bookmark ID
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* @param string $context How to filter the field value. Either 'raw', 'edit',
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* 'attribute', 'js', 'db', or 'display'
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* @return mixed The filtered value
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*/
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function sanitize_bookmark_field($field, $value, $bookmark_id, $context) {
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switch ( $field ) {
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case 'link_id' : // ints
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case 'link_rating' :
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$value = (int) $value;
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break;
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case 'link_category' : // array( ints )
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$value = array_map('absint', (array) $value);
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// We return here so that the categories aren't filtered.
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// The 'link_category' filter is for the name of a link category, not an array of a link's link categories
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return $value;
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case 'link_visible' : // bool stored as Y|N
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$value = preg_replace('/[^YNyn]/', '', $value);
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break;
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case 'link_target' : // "enum"
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$targets = array('_top', '_blank');
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if ( ! in_array($value, $targets) )
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$value = '';
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break;
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}
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if ( 'raw' == $context )
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return $value;
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if ( 'edit' == $context ) {
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/** This filter is documented in wp-includes/post.php */
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$value = apply_filters( "edit_$field", $value, $bookmark_id );
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if ( 'link_notes' == $field ) {
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$value = esc_html( $value ); // textarea_escaped
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} else {
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$value = esc_attr($value);
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}
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} elseif ( 'db' == $context ) {
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/** This filter is documented in wp-includes/post.php */
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$value = apply_filters( "pre_$field", $value );
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} else {
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/** This filter is documented in wp-includes/post.php */
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$value = apply_filters( $field, $value, $bookmark_id, $context );
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if ( 'attribute' == $context ) {
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$value = esc_attr( $value );
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} elseif ( 'js' == $context ) {
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$value = esc_js( $value );
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}
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}
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return $value;
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}
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/**
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* Deletes the bookmark cache.
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*
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* @since 2.7.0
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*
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* @param int $bookmark_id Bookmark ID.
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*/
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function clean_bookmark_cache( $bookmark_id ) {
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wp_cache_delete( $bookmark_id, 'bookmark' );
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wp_cache_delete( 'get_bookmarks', 'bookmark' );
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clean_object_term_cache( $bookmark_id, 'link');
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}
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