root/tags/1.3/wp-admin/includes/bookmark.php

<?php

function add_link() {
    return edit_link();
}

function edit_link( $link_id = '' ) {
    if (!current_user_can( 'manage_links' ))
        wp_die( __( 'Cheatin&#8217; uh?' ));

    $_POST['link_url'] = wp_specialchars( $_POST['link_url'] );
    $_POST['link_url'] = clean_url($_POST['link_url']);
    $_POST['link_name'] = wp_specialchars( $_POST['link_name'] );
    $_POST['link_image'] = wp_specialchars( $_POST['link_image'] );
    $_POST['link_rss'] = clean_url($_POST['link_rss']);

    if ( !empty( $link_id ) ) {
        $_POST['link_id'] = $link_id;
        return wp_update_link( $_POST);
    } else {
        return wp_insert_link( $_POST);
    }
}

function get_default_link_to_edit() {
    if ( isset( $_GET['linkurl'] ) )
        $link->link_url = clean_url( $_GET['linkurl']);
    else
        $link->link_url = '';

    if ( isset( $_GET['name'] ) )
        $link->link_name = attribute_escape( $_GET['name']);
    else
        $link->link_name = '';

    $link->link_visible = 'Y';

    return $link;
}

function wp_delete_link($link_id) {
    global $wpdb;

    do_action('delete_link', $link_id);

    wp_delete_object_term_relationships($link_id, 'link_category');

    $wpdb->query("DELETE FROM $wpdb->links WHERE link_id = '$link_id'");

    do_action('deleted_link', $link_id);

    return true;
}

function wp_get_link_cats($link_id = 0) {

    $cats = wp_get_object_terms($link_id, 'link_category', 'fields=ids');

    return array_unique($cats);
}

function get_link_to_edit( $link_id ) {
    return get_link( $link_id, OBJECT, 'edit' );
}

function wp_insert_link($linkdata) {
    global $wpdb, $current_user;

    $defaults = array('link_id' => 0, 'link_name' => '', 'link_url' => '', 'link_rating' => 0 );

    $linkdata = wp_parse_args($linkdata, $defaults);
    $linkdata = sanitize_bookmark($linkdata, 'db');

    extract($linkdata, EXTR_SKIP);

    $update = false;

    if ( !empty($link_id) )
        $update = true;

    if ( trim( $link_name ) == '' )
        return 0;

    if ( trim( $link_url ) == '' )
        return 0;

    if ( empty($link_rating) )
        $link_rating = 0;

    if ( empty($link_image) )
        $link_image = '';

    if ( empty($link_target) )
        $link_target = '';

    if ( empty($link_visible) )
        $link_visible = 'Y';

    if ( empty($link_owner) )
        $link_owner = $current_user->id;

    if ( empty($link_notes) )
        $link_notes = '';

    if ( empty($link_description) )
        $link_description = '';

    if ( empty($link_rss) )
        $link_rss = '';

    if ( empty($link_rel) )
        $link_rel = '';

    // Make sure we set a valid category
    if (0 == count($link_category) || !is_array($link_category)) {
        $link_category = array(get_option('default_link_category'));
    }

    if ( $update ) {
        $wpdb->query("UPDATE $wpdb->links SET link_url='$link_url',
            link_name='$link_name', link_image='$link_image',
            link_target='$link_target',
            link_visible='$link_visible', link_description='$link_description',
            link_rating='$link_rating', link_rel='$link_rel',
            link_notes='$link_notes', link_rss = '$link_rss'
            WHERE link_id='$link_id'");
    } else {
        $wpdb->query("INSERT INTO $wpdb->links (link_url, link_name, link_image, link_target, link_description, link_visible, link_owner, link_rating, link_rel, link_notes, link_rss) VALUES('$link_url','$link_name', '$link_image', '$link_target', '$link_description', '$link_visible', '$link_owner', '$link_rating', '$link_rel', '$link_notes', '$link_rss')");
        $link_id = (int) $wpdb->insert_id;
    }

    wp_set_link_cats($link_id, $link_category);

    if ( $update )
        do_action('edit_link', $link_id);
    else
        do_action('add_link', $link_id);

    return $link_id;
}

function wp_set_link_cats($link_id = 0, $link_categories = array()) {
    // If $link_categories isn't already an array, make it one:
    if (!is_array($link_categories) || 0 == count($link_categories))
        $link_categories = array(get_option('default_link_category'));

    $link_categories = array_map('intval', $link_categories);
    $link_categories = array_unique($link_categories);

    wp_set_object_terms($link_id, $link_categories, 'link_category');
}    // wp_set_link_cats()

function wp_update_link($linkdata) {
    global $wpdb;

    $link_id = (int) $linkdata['link_id'];

    $link = get_link($link_id, ARRAY_A);

    // Escape data pulled from DB.
    $link = add_magic_quotes($link);

    // Passed link category list overwrites existing category list if not empty.
    if ( isset($linkdata['link_category']) && is_array($linkdata['link_category'])
             && 0 != count($linkdata['link_category']) )
        $link_cats = $linkdata['link_category'];
    else
        $link_cats = $link['link_category'];

    // Merge old and new fields with new fields overwriting old ones.
    $linkdata = array_merge($link, $linkdata);
    $linkdata['link_category'] = $link_cats;

    return wp_insert_link($linkdata);
}

?>