root/branches/2.0/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_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 $wpdb->posts WHERE post_status = 'draft' AND post_author IN ($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);

    $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))
        $category_parent = 0;

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

    wp_cache_delete($cat_ID, 'category');

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

    return $cat_ID;
}

function wp_update_category($catarr) {
    global $wpdb;

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

    // 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;

    // Don't delete the default cat.
    if ($cat_ID == get_option('default_category'))
        return 0;

    $category = get_category($cat_ID);

    $parent = $category->category_parent;

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

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

    // TODO: Only set categories to general if they're not in another category already
    $default_cat = get_option('default_category');
    $wpdb->query("UPDATE $wpdb->post2cat SET category_id='$default_cat' WHERE category_id='$cat_ID'");

    wp_cache_delete($cat_ID, 'category');
    wp_cache_delete('all_category_ids', 'category');

    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_cats('', $post_id, $cat_ids);

    return $cat_ids;
}

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

    return (int) $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
    $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');

    do_action('delete_user', $id);

    return true;
}

function get_link($link_id, $output = OBJECT) {
    global $wpdb;
    
    $link = $wpdb->get_row("SELECT * FROM $wpdb->links WHERE link_id = '$link_id'");

    if ( $output == OBJECT ) {
        return $link;
    } elseif ( $output == ARRAY_A ) {
        return get_object_vars($link);
    } elseif ( $output == ARRAY_N ) {
        return array_values(get_object_vars($link));
    } else {
        return $link;
    }
}

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

    $update = false;

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

    $link_id = (int) $link_id;

    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);

    if ( $update ) {
        $wpdb->query("UPDATE $wpdb->links SET link_url='$link_url',
            link_name='$link_name', link_image='$link_image',
            link_target='$link_target', link_category='$link_category',
            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 $wpdb->links (link_url, link_name, link_image, link_target, link_category, link_description, link_visible, link_owner, link_rating, link_rel, link_notes, link_rss) VALUES('$link_url','$link_name', '$link_image', '$link_target', '$link_category', '$link_description', '$link_visible', '$link_owner', '$link_rating', '$link_rel', '$link_notes', '$link_rss')");
        $link_id = (int) $wpdb->insert_id;
    }
    
    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);
    
    // Merge old and new fields with new fields overwriting old ones.
    $linkdata = array_merge($link, $linkdata);

    return wp_insert_link($linkdata);
}

function wp_delete_link($link_id) {
    global $wpdb;

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

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'");
}

?>