root/tags/2.1.1/wp-admin/admin-functions.php

<?php

function write_post() {
    $result = wp_write_post();
    if( is_wp_error( $result ) )
        wp_die( $result->get_error_message() );
    else
        return $result;
}

// Creates a new post from the "Write Post" form using $_POST information.
function wp_write_post() {
    global $user_ID;

    if ( 'page' == $_POST['post_type'] ) {
        if ( !current_user_can( 'edit_pages' ) )
            return new WP_Error( 'edit_pages', __( 'You are not allowed to create pages on this blog.' ) );
    } else {
        if ( !current_user_can( 'edit_posts' ) )
            return new WP_Error( 'edit_posts', __( 'You are not allowed to create posts or drafts on this blog.' ) );
    }


    // Check for autosave collisions
    if ( isset($_POST['temp_ID']) ) {
        $temp_id = (int) $_POST['temp_ID'];
        if ( !$draft_ids = get_user_option( 'autosave_draft_ids' ) )
            $draft_ids = array();
        foreach ( $draft_ids as $temp => $real )
            if ( time() + $temp > 86400 ) // 1 day: $temp is equal to -1 * time( then )
                unset($draft_ids[$temp]);

        if ( isset($draft_ids[$temp_id]) ) { // Edit, don't write
            $_POST['post_ID'] = $draft_ids[$temp_id];
            unset($_POST['temp_ID']);
            relocate_children( $temp_id, $_POST['post_ID'] );
            update_user_option( $user_ID, 'autosave_draft_ids', $draft_ids );
            return edit_post();
        }
    }

    // Rename.
    $_POST['post_content'] = $_POST['content'];
    $_POST['post_excerpt'] = $_POST['excerpt'];
    $_POST['post_parent'] = $_POST['parent_id'];
    $_POST['to_ping'] = $_POST['trackback_url'];

    if (!empty ( $_POST['post_author_override'] ) ) {
        $_POST['post_author'] = (int) $_POST['post_author_override'];
    } else {
        if (!empty ( $_POST['post_author'] ) ) {
            $_POST['post_author'] = (int) $_POST['post_author'];
        } else {
            $_POST['post_author'] = (int) $_POST['user_ID'];
        }

    }

    if ( $_POST['post_author'] != $_POST['user_ID'] ) {
        if ( 'page' == $_POST['post_type'] ) {
            if ( !current_user_can( 'edit_others_pages' ) )
                return new WP_Error( 'edit_others_pages', __( 'You are not allowed to create pages as this user.' ) );
        } else {
            if ( !current_user_can( 'edit_others_posts' ) )
                return new WP_Error( 'edit_others_posts', __( 'You are not allowed to post as this user.' ) );

        }
    }

    // What to do based on which button they pressed
    if ('' != $_POST['saveasdraft'] )
        $_POST['post_status'] = 'draft';
    if ('' != $_POST['saveasprivate'] )
        $_POST['post_status'] = 'private';
    if ('' != $_POST['publish'] )
        $_POST['post_status'] = 'publish';
    if ('' != $_POST['advanced'] )
        $_POST['post_status'] = 'draft';

    if ( 'page' == $_POST['post_type'] ) {
        if ('publish' == $_POST['post_status'] && !current_user_can( 'publish_pages' ) )
            $_POST['post_status'] = 'draft';
    } else {
        if ('publish' == $_POST['post_status'] && !current_user_can( 'publish_posts' ) )
            $_POST['post_status'] = 'draft';
    }

    if (!isset( $_POST['comment_status'] ))
        $_POST['comment_status'] = 'closed';

    if (!isset( $_POST['ping_status'] ))
        $_POST['ping_status'] = 'closed';

    if (!empty ( $_POST['edit_date'] ) ) {
        $aa = $_POST['aa'];
        $mm = $_POST['mm'];
        $jj = $_POST['jj'];
        $hh = $_POST['hh'];
        $mn = $_POST['mn'];
        $ss = $_POST['ss'];
        $jj = ($jj > 31 ) ? 31 : $jj;
        $hh = ($hh > 23 ) ? $hh -24 : $hh;
        $mn = ($mn > 59 ) ? $mn -60 : $mn;
        $ss = ($ss > 59 ) ? $ss -60 : $ss;
        $_POST['post_date'] = sprintf( "%04d-%02d-%02d %02d:%02d:%02d", $aa, $mm, $jj, $hh, $mn, $ss );
        $_POST['post_date_gmt'] = get_gmt_from_date( $_POST['post_date'] );
    }

    // Create the post.
    $post_ID = wp_insert_post( $_POST );

    add_meta( $post_ID );

    // Reunite any orphaned attachments with their parent
    // Update autosave collision detection
    if ( $temp_id ) {
        relocate_children( $temp_id, $post_ID );
        $draft_ids[$temp_id] = $post_ID;
        update_user_option( $user_ID, 'autosave_draft_ids', $draft_ids );
    }

    // Now that we have an ID we can fix any attachment anchor hrefs
    fix_attachment_links( $post_ID );

    return $post_ID;
}

// Move child posts to a new parent
function relocate_children( $old_ID, $new_ID ) {
    global $wpdb;
    $old_ID = (int) $old_ID;
    $new_ID = (int) $new_ID;
    return $wpdb->query( "UPDATE $wpdb->posts SET post_parent = $new_ID WHERE post_parent = $old_ID" );
}

// Replace hrefs of attachment anchors with up-to-date permalinks.
function fix_attachment_links( $post_ID ) {
    global $wp_rewrite;

    $post = & get_post( $post_ID, ARRAY_A );

    $search = "#<a[^>]+rel=('|\")[^'\"]*attachment[^>]*>#ie";

    // See if we have any rel="attachment" links
    if ( 0 == preg_match_all( $search, $post['post_content'], $anchor_matches, PREG_PATTERN_ORDER ) )
        return;

    $i = 0;
    $search = "#[\s]+rel=(\"|')(.*?)wp-att-(\d+)\\1#i";
    foreach ( $anchor_matches[0] as $anchor ) {
        if ( 0 == preg_match( $search, $anchor, $id_matches ) )
            continue;

        $id = $id_matches[3];

        // While we have the attachment ID, let's adopt any orphans.
        $attachment = & get_post( $id, ARRAY_A );
        if ( ! empty( $attachment) && ! is_object( get_post( $attachment['post_parent'] ) ) ) {
            $attachment['post_parent'] = $post_ID;
            // Escape data pulled from DB.
            $attachment = add_magic_quotes( $attachment);
            wp_update_post( $attachment);
        }

        $post_search[$i] = $anchor;
        $post_replace[$i] = preg_replace( "#href=(\"|')[^'\"]*\\1#e", "stripslashes( 'href=\\1' ).get_attachment_link( $id ).stripslashes( '\\1' )", $anchor );
        ++$i;
    }

    $post['post_content'] = str_replace( $post_search, $post_replace, $post['post_content'] );

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

    return wp_update_post( $post);
}

// Update an existing post with values provided in $_POST.
function edit_post() {
    global $user_ID;

    $post_ID = (int) $_POST['post_ID'];

    if ( 'page' == $_POST['post_type'] ) {
        if ( !current_user_can( 'edit_page', $post_ID ) )
            wp_die( __('You are not allowed to edit this page.' ));
    } else {
        if ( !current_user_can( 'edit_post', $post_ID ) )
            wp_die( __('You are not allowed to edit this post.' ));
    }

    // Autosave shouldn't save too soon after a real save
    if ( 'autosave' == $_POST['action'] ) {
        $post =& get_post( $post_ID );
        $now = time();
        $then = strtotime($post->post_date_gmt . ' +0000');
        // Keep autosave_interval in sync with autosave-js.php.
        $delta = apply_filters( 'autosave_interval', 120 ) / 2;
        if ( ($now - $then) < $delta )
            return $post_ID;
    }

    // Rename.
    $_POST['ID'] = (int) $_POST['post_ID'];
    $_POST['post_content'] = $_POST['content'];
    $_POST['post_excerpt'] = $_POST['excerpt'];
    $_POST['post_parent'] = $_POST['parent_id'];
    $_POST['to_ping'] = $_POST['trackback_url'];

    if (!empty ( $_POST['post_author_override'] ) ) {
        $_POST['post_author'] = (int) $_POST['post_author_override'];
    } else
        if (!empty ( $_POST['post_author'] ) ) {
            $_POST['post_author'] = (int) $_POST['post_author'];
        } else {
            $_POST['post_author'] = (int) $_POST['user_ID'];
        }

    if ( $_POST['post_author'] != $_POST['user_ID'] ) {
        if ( 'page' == $_POST['post_type'] ) {
            if ( !current_user_can( 'edit_others_pages' ) )
                wp_die( __('You are not allowed to edit pages as this user.' ));
        } else {
            if ( !current_user_can( 'edit_others_posts' ) )
                wp_die( __('You are not allowed to edit posts as this user.' ));

        }
    }

    // What to do based on which button they pressed
    if ('' != $_POST['saveasdraft'] )
        $_POST['post_status'] = 'draft';
    if ('' != $_POST['saveasprivate'] )
        $_POST['post_status'] = 'private';
    if ('' != $_POST['publish'] )
        $_POST['post_status'] = 'publish';
    if ('' != $_POST['advanced'] )
        $_POST['post_status'] = 'draft';

    if ( 'page' == $_POST['post_type'] ) {
        if ('publish' == $_POST['post_status'] && !current_user_can( 'edit_published_pages' ))
            $_POST['post_status'] = 'draft';
    } else {
        if ('publish' == $_POST['post_status'] && !current_user_can( 'edit_published_posts' ))
            $_POST['post_status'] = 'draft';
    }

    if (!isset( $_POST['comment_status'] ))
        $_POST['comment_status'] = 'closed';

    if (!isset( $_POST['ping_status'] ))
        $_POST['ping_status'] = 'closed';

    if (!empty ( $_POST['edit_date'] ) ) {
        $aa = $_POST['aa'];
        $mm = $_POST['mm'];
        $jj = $_POST['jj'];
        $hh = $_POST['hh'];
        $mn = $_POST['mn'];
        $ss = $_POST['ss'];
        $jj = ($jj > 31 ) ? 31 : $jj;
        $hh = ($hh > 23 ) ? $hh -24 : $hh;
        $mn = ($mn > 59 ) ? $mn -60 : $mn;
        $ss = ($ss > 59 ) ? $ss -60 : $ss;
        $_POST['post_date'] = "$aa-$mm-$jj $hh:$mn:$ss";
        $_POST['post_date_gmt'] = get_gmt_from_date( "$aa-$mm-$jj $hh:$mn:$ss" );
    }

    // Meta Stuff
    if ( $_POST['meta'] ) {
        foreach ( $_POST['meta'] as $key => $value )
            update_meta( $key, $value['key'], $value['value'] );
    }

    if ( $_POST['deletemeta'] ) {
        foreach ( $_POST['deletemeta'] as $key => $value )
            delete_meta( $key );
    }

    add_meta( $post_ID );

    wp_update_post( $_POST);

    // Now that we have an ID we can fix any attachment anchor hrefs
    fix_attachment_links( $post_ID );

    return $post_ID;
}

function edit_comment() {
    global $user_ID;

    $comment_ID = (int) $_POST['comment_ID'];
    $comment_post_ID = (int) $_POST['comment_post_ID'];

    if (!current_user_can( 'edit_post', $comment_post_ID ))
        wp_die( __('You are not allowed to edit comments on this post, so you cannot edit this comment.' ));

    $_POST['comment_author'] = $_POST['newcomment_author'];
    $_POST['comment_author_email'] = $_POST['newcomment_author_email'];
    $_POST['comment_author_url'] = $_POST['newcomment_author_url'];
    $_POST['comment_approved'] = $_POST['comment_status'];
    $_POST['comment_content'] = $_POST['content'];
    $_POST['comment_ID'] = (int) $_POST['comment_ID'];

    if (!empty ( $_POST['edit_date'] ) ) {
        $aa = $_POST['aa'];
        $mm = $_POST['mm'];
        $jj = $_POST['jj'];
        $hh = $_POST['hh'];
        $mn = $_POST['mn'];
        $ss = $_POST['ss'];
        $jj = ($jj > 31 ) ? 31 : $jj;
        $hh = ($hh > 23 ) ? $hh -24 : $hh;
        $mn = ($mn > 59 ) ? $mn -60 : $mn;
        $ss = ($ss > 59 ) ? $ss -60 : $ss;
        $_POST['comment_date'] = "$aa-$mm-$jj $hh:$mn:$ss";
    }

    wp_update_comment( $_POST);
}

// Get an existing post and format it for editing.
function get_post_to_edit( $id ) {

    $post = get_post( $id );

    $post->post_content = format_to_edit( $post->post_content, user_can_richedit() );
    $post->post_content = apply_filters( 'content_edit_pre', $post->post_content);

    $post->post_excerpt = format_to_edit( $post->post_excerpt);
    $post->post_excerpt = apply_filters( 'excerpt_edit_pre', $post->post_excerpt);

    $post->post_title = format_to_edit( $post->post_title );
    $post->post_title = apply_filters( 'title_edit_pre', $post->post_title );

    $post->post_password = format_to_edit( $post->post_password );

    if ( $post->post_type == 'page' )
        $post->page_template = get_post_meta( $id, '_wp_page_template', true );

    return $post;
}

// Default post information to use when populating the "Write Post" form.
function get_default_post_to_edit() {
    if ( !empty( $_REQUEST['post_title'] ) )
        $post_title = wp_specialchars( stripslashes( $_REQUEST['post_title'] ));
    else if ( !empty( $_REQUEST['popuptitle'] ) ) {
        $post_title = wp_specialchars( stripslashes( $_REQUEST['popuptitle'] ));
        $post_title = funky_javascript_fix( $post_title );
    } else {
        $post_title = '';
    }

    if ( !empty( $_REQUEST['content'] ) )
        $post_content = wp_specialchars( stripslashes( $_REQUEST['content'] ));
    else if ( !empty( $post_title ) ) {
        $text       = wp_specialchars( stripslashes( urldecode( $_REQUEST['text'] ) ) );
        $text       = funky_javascript_fix( $text);
        $popupurl   = attribute_escape($_REQUEST['popupurl']);
        $post_content = '<a href="'.$popupurl.'">'.$post_title.'</a>'."\n$text";
    }

    if ( !empty( $_REQUEST['excerpt'] ) )
        $post_excerpt = wp_specialchars( stripslashes( $_REQUEST['excerpt'] ));
    else
        $post_excerpt = '';

    $post->post_status = 'draft';
    $post->comment_status = get_option( 'default_comment_status' );
    $post->ping_status = get_option( 'default_ping_status' );
    $post->post_pingback = get_option( 'default_pingback_flag' );
    $post->post_category = get_option( 'default_category' );
    $post->post_content = apply_filters( 'default_content', $post_content);
    $post->post_title = apply_filters( 'default_title', $post_title );
    $post->post_excerpt = apply_filters( 'default_excerpt', $post_excerpt);
    $post->page_template = 'default';
    $post->post_parent = 0;
    $post->menu_order = 0;

    return $post;
}

function get_comment_to_edit( $id ) {
    $comment = get_comment( $id );

    $comment->comment_content = format_to_edit( $comment->comment_content, user_can_richedit() );
    $comment->comment_content = apply_filters( 'comment_edit_pre', $comment->comment_content);

    $comment->comment_author = format_to_edit( $comment->comment_author );
    $comment->comment_author_email = format_to_edit( $comment->comment_author_email );
    $comment->comment_author_url = format_to_edit( $comment->comment_author_url );

    return $comment;
}

function get_category_to_edit( $id ) {
    $category = get_category( $id );

    return $category;
}

function wp_dropdown_roles( $default = false ) {
    global $wp_roles;
    $r = '';
    foreach( $wp_roles->role_names as $role => $name )
        if ( $default == $role ) // Make default first in list
            $p = "\n\t<option selected='selected' value='$role'>$name</option>";
        else
            $r .= "\n\t<option value='$role'>$name</option>";
    echo $p . $r;
}


function get_user_to_edit( $user_id ) {
    $user = new WP_User( $user_id );
    $user->user_login   = attribute_escape($user->user_login);
    $user->user_email   = attribute_escape($user->user_email);
    $user->user_url     = attribute_escape($user->user_url);
    $user->first_name   = attribute_escape($user->first_name);
    $user->last_name    = attribute_escape($user->last_name);
    $user->display_name = attribute_escape($user->display_name);
    $user->nickname     = attribute_escape($user->nickname);
    $user->aim          = attribute_escape($user->aim);
    $user->yim          = attribute_escape($user->yim);
    $user->jabber       = attribute_escape($user->jabber);
    $user->description  =  wp_specialchars($user->description);

    return $user;
}

// Creates a new user from the "Users" form using $_POST information.

function add_user() {
    if ( func_num_args() ) { // The hackiest hack that ever did hack
        global $current_user, $wp_roles;
        $user_id = func_get_arg( 0 );

        if ( isset( $_POST['role'] ) ) {
            if( $user_id != $current_user->id || $wp_roles->role_objects[$_POST['role']]->has_cap( 'edit_users' ) ) {
                $user = new WP_User