347 lines
10 KiB
PHP
347 lines
10 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 based on ID
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*
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* @since 2.1
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* @uses $wpdb Database Object
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*
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* @param int $bookmark_id
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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 Type returned depends on $output value.
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*/
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function get_bookmark($bookmark_id, $output = OBJECT, $filter = 'raw') {
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global $wpdb;
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$link = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->links WHERE link_id = %d LIMIT 1", $bookmark_id));
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$link->link_category = array_unique( wp_get_object_terms($link->link_id, 'link_category', 'fields=ids') );
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$link = sanitize_bookmark($link, $filter);
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if ( $output == OBJECT ) {
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return $link;
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} elseif ( $output == ARRAY_A ) {
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return get_object_vars($link);
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} elseif ( $output == ARRAY_N ) {
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return array_values(get_object_vars($link));
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} else {
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return $link;
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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
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* @uses get_bookmark() Gets bookmark object using $bookmark as ID
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* @uses sanitize_bookmark_field() Sanitizes Bookmark field based on $context.
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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
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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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* Retrieve bookmark data based on ID.
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*
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* @since 2.0
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* @deprecated Use get_bookmark()
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* @see get_bookmark()
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*
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* @param int $bookmark_id ID of link
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* @param string $output Either OBJECT, ARRAY_N, or ARRAY_A
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* @return object|array
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*/
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function get_link($bookmark_id, $output = OBJECT, $filter = 'raw') {
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return get_bookmark($bookmark_id, $output, $filter);
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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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* List of default arguments are as follows:
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* 'orderby' - Default is 'name' (string). How to order the links by. String is
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* based off of the bookmark scheme.
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* 'order' - Default is 'ASC' (string). Either 'ASC' or 'DESC'. Orders in either
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* ascending or descending order.
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* 'limit' - Default is -1 (integer) or show all. The amount of bookmarks to
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* display.
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* 'category' - Default is empty string (string). Include the links in what
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* category ID(s).
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* 'category_name' - Default is empty string (string). Get links by category
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* name.
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* 'hide_invisible' - Default is 1 (integer). Whether to show (default) or hide
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* links marked as 'invisible'.
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* 'show_updated' - Default is 0 (integer). Will show the time of when the
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* bookmark was last updated.
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* 'include' - Default is empty string (string). Include other categories
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* separated by commas.
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* 'exclude' - Default is empty string (string). Exclude other categories
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* separated by commas.
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*
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* @since 2.1
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* @uses $wpdb Database Object
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* @link http://codex.wordpress.org/Template_Tags/get_bookmarks
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*
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* @param string|array $args List of arguments to overwrite the defaults
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* @return array List of bookmark row objects
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*/
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function get_bookmarks($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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extract( $r, EXTR_SKIP );
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$key = md5( serialize( $r ) );
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if ( $cache = wp_cache_get( 'get_bookmarks', 'bookmark' ) )
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if ( isset( $cache[ $key ] ) )
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return apply_filters('get_bookmarks', $cache[ $key ], $r );
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$inclusions = '';
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if ( !empty($include) ) {
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$exclude = ''; //ignore exclude, category, and category_name params if using include
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$category = '';
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$category_name = '';
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$inclinks = preg_split('/[\s,]+/',$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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if (!empty($inclusions))
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$inclusions .= ')';
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$exclusions = '';
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if ( !empty($exclude) ) {
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$exlinks = preg_split('/[\s,]+/',$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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if (!empty($exclusions))
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$exclusions .= ')';
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if ( ! empty($category_name) ) {
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if ( $category = get_term_by('name', $category_name, 'link_category') )
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$category = $category->term_id;
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}
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if ( ! empty($search) ) {
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$search = like_escape($search);
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$search = " AND ( (link_url LIKE '%$search%') OR (link_name LIKE '%$search%') OR (link_description LIKE '%$search%') ) ";
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}
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$category_query = '';
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$join = '';
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if ( !empty($category) ) {
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$incategories = preg_split('/[\s,]+/',$category);
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if ( count($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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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 $wpdb->term_taxonomy as tt ON tt.term_taxonomy_id = tr.term_taxonomy_id";
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}
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if (get_option('links_recently_updated_time')) {
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$recently_updated_test = ", IF (DATE_ADD(link_updated, INTERVAL " . get_option('links_recently_updated_time') . " 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 = ( $show_updated ) ? ', UNIX_TIMESTAMP(link_updated) AS link_updated_f ' : '';
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$orderby = strtolower($orderby);
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$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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$orderby = 'rand()';
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break;
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default:
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$orderby = "link_" . $orderby;
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}
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if ( 'link_id' == $orderby )
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$orderby = "$wpdb->links.link_id";
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$visible = '';
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if ( $hide_invisible )
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$visible = "AND link_visible = 'Y'";
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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 $order";
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if ($limit != -1)
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$query .= " LIMIT $limit";
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$results = $wpdb->get_results($query);
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$cache[ $key ] = $results;
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wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );
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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
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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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$do_object = false;
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if ( is_object($bookmark) )
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$do_object = true;
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foreach ( $fields as $field ) {
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if ( $do_object )
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$bookmark->$field = sanitize_bookmark_field($field, $bookmark->$field, $bookmark->link_id, $context);
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else
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$bookmark[$field] = sanitize_bookmark_field($field, $bookmark[$field], $bookmark['link_id'], $context);
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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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* $context is 'raw' then the value is immediately return.
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*
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* Hooks exist for the more generic cases. With the 'edit' context, the
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* 'edit_$field' filter will be called and passed the $value and $bookmark_id
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* respectively. With the 'db' context, the 'pre_$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
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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, $context) {
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$int_fields = array('link_id', 'link_rating');
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if ( in_array($field, $int_fields) )
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$value = (int) $value;
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$yesno = array('link_visible');
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if ( in_array($field, $yesno) )
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$value = preg_replace('/[^YNyn]/', '', $value);
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if ( 'link_target' == $field ) {
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$targets = array('_top', '_blank');
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if ( ! in_array($value, $targets) )
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$value = '';
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}
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if ( 'raw' == $context )
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return $value;
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if ( 'edit' == $context ) {
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$format_to_edit = array('link_notes');
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$value = apply_filters("edit_$field", $value, $bookmark_id);
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if ( in_array($field, $format_to_edit) ) {
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$value = format_to_edit($value);
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} else {
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$value = attribute_escape($value);
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}
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} else if ( 'db' == $context ) {
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$value = apply_filters("pre_$field", $value);
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} else {
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// Use display filters by default.
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$value = apply_filters($field, $value, $bookmark_id, $context);
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}
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if ( 'attribute' == $context )
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$value = attribute_escape($value);
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else if ( 'js' == $context )
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$value = js_escape($value);
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return $value;
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}
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/**
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* Deletes entire bookmark cache
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*
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* @since 2.1
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* @uses wp_cache_delete() Deletes the contents of 'get_bookmarks'
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*/
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function delete_get_bookmark_cache() {
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wp_cache_delete( 'get_bookmarks', 'bookmark' );
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}
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add_action( 'add_link', 'delete_get_bookmark_cache' );
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add_action( 'edit_link', 'delete_get_bookmark_cache' );
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add_action( 'delete_link', 'delete_get_bookmark_cache' );
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?>
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