<?php
require_once(WCF_DIR.'lib/system/event/EventListener.class.php');
require_once(WBB_DIR.'lib/form/PostEditForm.class.php');

class PostAuthorChangeListener implements EventListener {
    public function  execute($eventObj, $className, $eventName) {
        switch($eventName)
        {
            case "readFormParameters":
                if(WCF::getUser()->getPermission('mod.board.canChangeAuthor'))
                    if(isset($_POST['postAuthor'])) $eventObj->formPostAuthor = escapeString($_POST["postAuthor"]);
                break;
            case "save":
                // Check if author is changed& user has the permission to change
                if (!isset ($eventObj->formPostAuthor))
                    break;

                if ($eventObj->post->username == $eventObj->formPostAuthor || $eventObj->formPostAuthor == "")
                    break;

                if (!isset($eventObj->formPostAuthor))
                    throw new UserInputException ('author', 'notValid');

                $sql = "select
                            userID from wcf".WCF_N."_user
                        where username = '".$eventObj->formPostAuthor."'";
                $row = WCF::getDB()->getFirstRow($sql);
                // User exist, change author now.
                if ($row)
                {
                    $eventObj->formPostAuthorId = $row['userID'];
                    $sql = "update wbb".WBB_N."_post
                                set userID = ".$eventObj->formPostAuthorId.", username = '".$eventObj->formPostAuthor."'
                            where postID = ".$eventObj->postID."
                            ";
                    // Update post- Database entry
                    WCF::getDB()->sendQuery($sql);


                    $sql = "update wbb".WBB_N."_user
                                set posts = posts + 1
                            where userID = ".$eventObj->formPostAuthorId."
                           ";
                    WCF::getDB()->sendQuery($sql);

                    $sql = "update wbb".WBB_N."_user
                                set posts = posts - 1
                            where userID = ".$eventObj->post->userID."
                           ";
                    WCF::getDB()->sendQuery($sql);


                    // Update last post author

                    // refresh thread
                    $eventObj->thread->refresh(false);
                    if ($eventObj->post->time >= $eventObj->thread->lastPostTime) {
                            $eventObj->thread->setLastPost();
                    }

                    // refresh board
                    $eventObj->board->refresh();
                    if ($eventObj->post->time >= $eventObj->board->getLastPostTime($eventObj->thread->languageID)) {
                            $eventObj->board->setLastPosts();
                    }
                }
                else
                    throw new UserInputException ('postAuthor', 'notValid');
                break;
        }
    }
}
?>