root/tags/2.1.2/wp-admin/admin-db.php

<?php

function get_users_drafts( $user_id ) {
    global $wpdb;
    $user_id = (int) $user_id;
    $query = "SELECT ID, post_title FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'draft' AND post_author = $user_id ORDER BY ID DESC";
    $query = apply_filters('get_users_drafts', $query);
    return $wpdb->get_results( $query );
}

function get_others_drafts( $user_id ) {
    global $wpdb;
    $user = get_userdata( $user_id );
    $level_key = $wpdb->prefix . 'user_level';

    $editable = get_editable_user_ids( $user_id );

    if( !$editable ) {
        $other_drafts = '';
    } else {
        $editable = join(',', $editable);
        $other_drafts = $wpdb->get_results("SELECT ID, post_title FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'draft' AND post_author IN ($editable) AND post_author != '$user_id' ");
    }

    return apply_filters('get_others_drafts', $other_drafts);
}

function get_editable_authors( $user_id ) {
    global $wpdb;

    $editable = get_editable_user_ids( $user_id );

    if( !$editable ) {
        return false;
    } else {
        $editable = join(',', $editable);
        $authors = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($editable) ORDER BY display_name" );
    }

    return apply_filters('get_editable_authors', $authors);
}

function get_editable_user_ids( $user_id, $exclude_zeros = true ) {
    global $wpdb;

    $user = new WP_User( $user_id );

    if ( ! $user->has_cap('edit_others_posts') ) {
        if ( $user->has_cap('edit_posts') || $exclude_zeros == false )
            return array($user->id);
        else
            return false;
    }

    $level_key = $wpdb->prefix . 'user_level';

    $query = "SELECT user_id FROM $wpdb->usermeta WHERE meta_key = '$level_key'";
    if ( $exclude_zeros )
        $query .= " AND meta_value != '0'";

    return $wpdb->get_col( $query );
}

function get_author_user_ids() {
    global $wpdb;
    $level_key = $wpdb->prefix . 'user_level';

    $query = "SELECT user_id FROM $wpdb->usermeta WHERE meta_key = '$level_key' AND meta_value != '0'";

    return $wpdb->get_col( $query );
}

function get_nonauthor_user_ids() {
    global $wpdb;
    $level_key = $wpdb->prefix . 'user_level';

    $query = "SELECT user_id FROM $wpdb->usermeta WHERE meta_key = '$level_key' AND meta_value = '0'";

    return $wpdb->get_col( $query );
}

function wp_insert_category($catarr) {
    global $wpdb;

    extract($catarr);

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

    $cat_ID = (int) $cat_ID;

    // Are we updating or creating?
    if (!empty ($cat_ID))
        $update = true;
    else
        $update = false;

    $cat_name = apply_filters('pre_category_name', $cat_name);

    if (empty ($category_nicename))
        $category_nicename = sanitize_title($cat_name);
    else
        $category_nicename = sanitize_title($category_nicename);
    $category_nicename = apply_filters('pre_category_nicename', $category_nicename);

    if (empty ($category_description))
        $category_description = '';
    $category_description = apply_filters('pre_category_description', $category_description);

    $category_parent = (int) $category_parent;
    if ( empty($category_parent) || !get_category( $category_parent ) || ($cat_ID && cat_is_ancestor_of($cat_ID, $category_parent) ) )
        $category_parent = 0;

    if ( isset($posts_private) )
        $posts_private = (int) $posts_private;
    else
        $posts_private = 0;

    if ( isset($links_private) )
        $links_private = (int) $links_private;
    else
        $links_private = 0;

    if (!$update) {
        $wpdb->query("INSERT INTO $wpdb->categories (cat_ID, cat_name, category_nicename, category_description, category_parent, links_private, posts_private) VALUES ('0', '$cat_name', '$category_nicename', '$category_description', '$category_parent', '$links_private', '$posts_private')");
        $cat_ID = $wpdb->insert_id;
    } else {
        $wpdb->query ("UPDATE $wpdb->categories SET cat_name = '$cat_name', category_nicename = '$category_nicename', category_description = '$category_description', category_parent = '$category_parent', links_private = '$links_private', posts_private = '$posts_private' WHERE cat_ID = '$cat_ID'");
    }

    if ( $category_nicename == '' ) {
        $category_nicename = sanitize_title($cat_name, $cat_ID );
        $wpdb->query( "UPDATE $wpdb->categories SET category_nicename = '$category_nicename' WHERE cat_ID = '$cat_ID'" );
    }

    // Keep in mind when using this filter and altering the cat_ID that the two queries above
    // have already taken place with the OLD cat_ID
    // Also note that you may have post2cat entries with the old cat_ID if this is an update

    if ($update) {
        do_action('edit_category', $cat_ID);
    } else {
        do_action('create_category', $cat_ID);
        do_action('add_category', $cat_ID);
    }

    $cat_ID = apply_filters('cat_id_filter', $cat_ID, $update);

    clean_category_cache($cat_ID);

    return $cat_ID;
}

function wp_update_category($catarr) {
    global $wpdb;

    $cat_ID = (int) $catarr['cat_ID'];

    if( $cat_ID == $catarr['category_parent'] )
        return false;

    // First, get all of the original fields
    $category = get_category($cat_ID, ARRAY_A);

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

    // Merge old and new fields with new fields overwriting old ones.
    $catarr = array_merge($category, $catarr);

    return wp_insert_category($catarr);
}

function wp_delete_category($cat_ID) {
    global $wpdb;

    $cat_ID = (int) $cat_ID;
    $default_cat = get_option('default_category');
    $default_link_cat = get_option('default_link_category');

    // Don't delete either of the default cats
    if ( $cat_ID == $default_cat || $cat_ID == $default_link_cat )
        return 0;

    $category = get_category($cat_ID);

    $parent = $category->category_parent;

    // Delete the category
    if ( !$wpdb->query("DELETE FROM $wpdb->categories WHERE cat_ID = '$cat_ID'") )
        return 0;

    // Update children to point to new parent
    $wpdb->query("UPDATE $wpdb->categories SET category_parent = '$parent' WHERE category_parent = '$cat_ID'");

    // Only set posts and links to the default category if they're not in another category already
    $posts = $wpdb->get_col("SELECT post_id FROM $wpdb->post2cat WHERE category_id='$cat_ID'");
    foreach ( (array) $posts as $post_id ) {
        $cats = wp_get_post_categories($post_id);
        if ( 1 == count($cats) )
            $cats = array($default_cat);
        else
            $cats = array_diff($cats, array($cat_ID));
        wp_set_post_categories($post_id, $cats);
    }

    $links = $wpdb->get_col("SELECT link_id FROM $wpdb->link2cat WHERE category_id='$cat_ID'");
    foreach ( (array) $links as $link_id ) {
        $cats = wp_get_link_cats($link_id);
        if ( 1 == count($cats) )
            $cats = array($default_link_cat);
        else
            $cats = array_diff($cats, array($cat_ID));
        wp_set_link_cats($link_id, $cats);
    }

    clean_category_cache($cat_ID);
    do_action('delete_category', $cat_ID);
    return 1;
}

function wp_create_category($cat_name) {
    $cat_array = compact('cat_name');
    return wp_insert_category($cat_array);
}

function wp_create_categories($categories, $post_id = '') {
    $cat_ids = array ();
    foreach ($categories as $category) {
        if ($id = category_exists($category))
            $cat_ids[] = $id;
        else
            if ($id = wp_create_category($category))
                $cat_ids[] = $id;
    }

    if ($post_id)
        wp_set_post_categories($post_id, $cat_ids);

    return $cat_ids;
}

function category_exists($cat_name) {
    global $wpdb;
    if (!$category_nicename = sanitize_title($cat_name))
        return 0;

    return $wpdb->get_var("SELECT cat_ID FROM $wpdb->categories WHERE category_nicename = '$category_nicename'");
}

function wp_delete_user($id, $reassign = 'novalue') {
    global $wpdb;

    $id = (int) $id;
    $user = get_userdata($id);

    if ($reassign == 'novalue') {
        $post_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_author = $id");

        if ($post_ids) {
            foreach ($post_ids as $post_id)
                wp_delete_post($post_id);
        }

        // Clean links
        $wpdb->query("DELETE FROM $wpdb->links WHERE link_owner = $id");
    } else {
        $reassign = (int) $reassign;
        $wpdb->query("UPDATE $wpdb->posts SET post_author = {$reassign} WHERE post_author = {$id}");
        $wpdb->query("UPDATE $wpdb->links SET link_owner = {$reassign} WHERE link_owner = {$id}");
    }

    // FINALLY, delete user
    do_action('delete_user', $id);

    $wpdb->query("DELETE FROM $wpdb->users WHERE ID = $id");
    $wpdb->query("DELETE FROM $wpdb->usermeta WHERE user_id = '$id'");

    wp_cache_delete($id, 'users');
    wp_cache_delete($user->user_login, 'userlogins');

    return true;
}

function wp_revoke_user($id) {
    $id = (int) $id;

    $user = new WP_User($id);
    $user->remove_all_caps();
}

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

    extract($linkdata);

    $update = false;

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

    if( trim( $link_name ) == '' )
        return 0;
    $link_name = apply_filters('pre_link_name', $link_name);

    if( trim( $link_url ) == '' )
        return 0;
    $link_url = apply_filters('pre_link_url', $link_url);

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

    if ( empty($link_image) )
        $link_image = '';
    $link_image = apply_filters('pre_link_image', $link_image);

    if ( empty($link_target) )
        $link_target = '';
    $link_target = apply_filters('pre_link_target', $link_target);

    if ( empty($link_visible) )
        $link_visible = 'Y';
    $link_visibile = preg_replace('/[^YNyn]/', '', $link_visible);

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

    if ( empty($link_notes) )
        $link_notes = '';
    $link_notes = apply_filters('pre_link_notes', $link_notes);

    if ( empty($link_description) )
        $link_description = '';
    $link_description = apply_filters('pre_link_description', $link_description);

    if ( empty($link_rss) )
        $link_rss = '';
    $link_rss = apply_filters('pre_link_rss', $link_rss);

    if ( empty($link_rel) )
        $link_rel = '';
    $link_rel = apply_filters('pre_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 = $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_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);
}

function wp_delete_link($link_id) {
    global $wpdb;

    do_action('delete_link', $link_id);

    $categories = wp_get_link_cats($link_id);
    if( is_array( $categories ) ) {
        foreach ( $categories as $category ) {
            $wpdb->query("UPDATE $wpdb->categories SET link_count = link_count - 1 WHERE cat_ID = '$category'");
            wp_cache_delete($category, 'category');
            do_action('edit_category', $cat_id);
        }
    }

    $wpdb->query("DELETE FROM $wpdb->link2cat WHERE link_id = '$link_id'");
    return $wpdb->query("DELETE FROM $wpdb->links WHERE link_id = '$link_id'");
}

function wp_get_link_cats($link_ID = 0) {
    global $wpdb;

    $sql = "SELECT category_id
        FROM $wpdb->link2cat
        WHERE link_id = $link_ID
        ORDER BY category_id";

    $result = $wpdb->get_col($sql);

    if ( !$result )
        $result = array();

    return array_unique($result);
}

function wp_set_link_cats($link_ID = 0, $link_categories = array()) {
    global $wpdb;
    // 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'));

    $link_categories = array_unique($link_categories);

    // First the old categories
    $old_categories = $wpdb->get_col("
        SELECT category_id
        FROM $wpdb->link2cat
        WHERE link_id = $link_ID");

    if (!$old_categories) {
        $old_categories = array();
    } else {
        $old_categories = array_unique($old_categories);
    }

    // Delete any?
    $delete_cats = array_diff($old_categories,$link_categories);

    if ($delete_cats) {
        foreach ($delete_cats as $del) {
            $wpdb->query("
                DELETE FROM $wpdb->link2cat
                WHERE category_id = $del
                    AND link_id = $link_ID
                ");
        }
    }

    // Add any?
    $add_cats = array_diff($link_categories, $old_categories);

    if ($add_cats) {
        foreach ($add_cats as $new_cat) {
            $wpdb->query("
                INSERT INTO $wpdb->link2cat (link_id, category_id)
                VALUES ($link_ID, $new_cat)");
        }
    }

    // Update category counts.
    $all_affected_cats = array_unique(array_merge($link_categories, $old_categories));
    foreach ( $all_affected_cats as $cat_id ) {
        $count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->link2cat, $wpdb->links WHERE $wpdb->links.link_id = $wpdb->link2cat.link_id AND category_id = '$cat_id'");
        $wpdb->query("UPDATE $wpdb->categories SET link_count = '$count' WHERE cat_ID = '$cat_id'");
        wp_cache_delete($cat_id, 'category');
        do_action('edit_category', $cat_id);
    }

}    // wp_set_link_cats()

function post_exists($title, $content = '', $post_date = '') {
    global $wpdb;

    if (!empty ($post_date))
        $post_date = "AND post_date = '$post_date'";

    if (!empty ($title))
        return $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_title = '$title' $post_date");
    else
        if (!empty ($content))
            return $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_content = '$content' $post_date");

    return 0;
}

function comment_exists($comment_author, $comment_date) {
    global $wpdb;

    return $wpdb->get_var("SELECT comment_post_ID FROM $wpdb->comments
            WHERE comment_author = '$comment_author' AND comment_date = '$comment_date'");
}

?>