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PHP-Code:
<?php
/**
 * MyBB
 * Copyright © 2006 MyBB Group, All Rights Reserved
 *
 * Website: http://www.mybboard.net
 * License: http://www.mybboard.net/eula.html
 *
 * $Id: functions_upload.php 3055 2007-05-13 15:01:15Z Tikitiki $
 */


/**
 * Remove an attachment from a specific post
 *
 * @param int The post ID
 * @param string The posthash if available
 * @param int The attachment ID
 */
function remove_attachment($pid, $posthash, $aid)
{
    global $db, $mybb;
    
    if($pid) 
    { 
        $post = get_post($pid); 
    } 
    
    $aid = intval($aid);
    $posthash = $db->escape_string($posthash);
    if($posthash != "")
    {
        $query = $db->simple_select(TABLE_PREFIX."attachments", "*", "aid='$aid' AND posthash='$posthash'");
        $attachment = $db->fetch_array($query);
    }
    else
    {
        $query = $db->simple_select(TABLE_PREFIX."attachments", "*", "aid='$aid' AND pid='$pid'");
        $attachment = $db->fetch_array($query);
    }
    $db->delete_query(TABLE_PREFIX."attachments", "aid='".$attachment['aid']."'");
    @unlink($mybb->settings['uploadspath']."/".$attachment['attachname']);
    if($attachment['thumbnail'])
    {
        @unlink($mybb->settings['uploadspath']."/".$attachment['thumbnail']);
    }
    if($attachment['visible'] == 1 && $post['pid']) 
    { 
         update_thread_counters($post['tid'], array("attachmentcount" => "-1")); 
    }
}

/**
 * Remove all of the attachments from a specific post
 *
 * @param int The post ID
 * @param string The posthash if available
 */
function remove_attachments($pid, $posthash="")
{
    global $db, $mybb;
    
    if($pid) 
    { 
        $post = get_post($pid); 
    } 
    
    $posthash = $db->escape_string($posthash);
    if($posthash != "" && !$pid)
    {
      $query = $db->simple_select(TABLE_PREFIX."attachments", "*", "posthash='$posthash'");
    }
    else
    {
        $query = $db->simple_select(TABLE_PREFIX."attachments", "*", "pid='$pid'");
    }
    $num_attachments = 0;
    while($attachment = $db->fetch_array($query))
    {
        if($attachment['visible'] == 1) 
        { 
            $num_attachments++; 
        }
        $db->delete_query(TABLE_PREFIX."attachments", "aid='".$attachment['aid']."'");
        @unlink($mybb->settings['uploadspath']."/".$attachment['attachname']);
        if($attachment['thumbnail'])
        {
            @unlink($mybb->settings['uploadspath']."/".$attachment['thumbnail']);
        }
    }
    if($post['pid']) 
     { 
         update_thread_counters($post['tid'], array("attachmentcount" => "-{$num_attachments}"));
    }
}

/**
 * Remove any matching avatars for a specific user ID
 *
 * @param int The user ID
 * @param string A file name to be excluded from the removal
 */
function remove_avatars($uid, $exclude="")
{
    global $mybb;
    $dir = opendir($mybb->settings['avataruploadpath']);
    if($dir)
    {
        while($file = @readdir($dir))
        {
            if(preg_match("#avatar_".$uid."\.#", $file) && is_file($mybb->settings['avataruploadpath']."/".$file) && $file != $exclude)
            {
                @unlink($mybb->settings['avataruploadpath']."/".$file);
            }
        }

        @closedir($dir);
    }
}

/**
 * Upload a new avatar in to the file system
 *
 * @return array Array of errors if any, otherwise filename of successful.
 */
function upload_avatar()
{
    global $db, $mybb, $lang, $_FILES;
    $avatar = $_FILES['avatarupload'];
    if(!is_uploaded_file($avatar['tmp_name']))
    {
        $ret['error'] = $lang->error_uploadfailed;
        return $ret;
    }

    // Check we have a valid extension
    $ext = get_extension(strtolower($avatar['name']));
    if(!preg_match("#(gif|jpg|jpeg|jpe|bmp|png)$#i", $ext)) {
        $ret['error'] = $lang->error_avatartype;
        return $ret;
    }

    // Next check the file size
    if($avatar['size'] > ($mybb->settings['avatarsize']*1024) && $mybb->settings['avatarsize'] > 0)
    {
        $ret['error'] = $lang->error_uploadsize;
        return $ret;
    }

    $filename = "avatar_".$mybb->user['uid'].".".$ext;
    $file = upload_file($avatar, $mybb->settings['avataruploadpath'], $filename);
    if($file['error'])
    {
        $ret['error'] = $lang->error_uploadfailed;
        return $ret;
    }

    // Lets just double check that it exists
    if(!file_exists($mybb->settings['avataruploadpath']."/".$filename))
    {
        $ret['error'] = $lang->error_uploadfailed;
        return $ret;
    }

    // Check if this is a valid image or not
    $img_dimensions = @getimagesize($mybb->settings['avataruploadpath']."/".$filename);
    if(!is_array($img_dimensions))
    {
        $ret['error'] = $lang->error_uploadfailed;
        return $ret;
    }
    
    // Check a list of known MIME types to establish what kind of avatar we're uploading
    switch(strtolower($avatar['type']))
    {
        case "image/gif":
            $img_type =  1;
            break;
        case "image/jpeg":
        case "image/x-jpg":
        case "image/x-jpeg":
        case "image/pjpeg":
        case "image/jpg":
            $img_type = 2;
            break;
        case "image/png":
        case "image/x-png":
            $img_type = 3;
            break;
        default:
            $img_type = 0;
    }
    
    // Check if the uploaded file type matches the correct image type (returned by getimagesize)
    if($img_dimensions[2] != $img_type || $img_type == 0)
    {
        $ret['error'] = $lang->error_uploadfailed;
        return $ret;        
    }
    

    // If we've got this far check dimensions
    if($mybb->settings['maxavatardims'] != "")
    {
        list($maxwidth, $maxheight) = @explode("x", $mybb->settings['maxavatardims']);
        if(($maxwidth && $img_dimensions[0] > $maxwidth) || ($maxheight && $img_dimensions[1] > $maxheight))
        {
            $ret['error'] = sprintf($lang->error_avatartoobig, $maxwidth, $maxheight);
            @unlink($mybb->settings['avataruploadpath']."/".$filename);
            return $ret;
        }
    }
    // Everything is okay so lets delete old avatars for this user
    remove_avatars($mybb->user['uid'], $filename);

    $ret = array(
        "avatar" => $mybb->settings['avataruploadpath']."/".$filename,
        "width" => intval($img_dimensions[0]),
        "height" => intval($img_dimensions[1])
    );
    return $ret;
}

/**
 * Upload an attachment in to the file system
 *
 * @param array Attachment data (as fed by PHPs $_FILE)
 * @return array Array of attachment data if successful, otherwise array of error data
 */
function upload_attachment($attachment)
{
    global $db, $theme, $templates, $posthash, $pid, $tid, $forum, $mybb, $lang;

    $posthash = $db->escape_string($mybb->input['posthash']);

    if(isset($attachment['error']) && $attachment['error'] != 0)
    {
        $ret['error'] = $lang->error_uploadfailed.$lang->error_uploadfailed_detail;
        switch($attachment['error'])
        {
            case 1: // UPLOAD_ERR_INI_SIZE
                $ret['error'] .= $lang->error_uploadfailed_php1;
                break;
            case 2: // UPLOAD_ERR_FORM_SIZE
                $ret['error'] .= $lang->error_uploadfailed_php2;
                break;
            case 3: // UPLOAD_ERR_PARTIAL
                $ret['error'] .= $lang->error_uploadfailed_php3;
                break;
            case 4: // UPLOAD_ERR_NO_FILE
                $ret['error'] .= $lang->error_uploadfailed_php4;
                break;
            case 6: // UPLOAD_ERR_NO_TMP_DIR
                $ret['error'] .= $lang->error_uploadfailed_php6;
                break;
            case 7: // UPLOAD_ERR_CANT_WRITE
                $ret['error'] .= $lang->error_uploadfailed_php7;
                break;
            default:
                $ret['error'] .= sprintf($lang->error_uploadfailed_phpx, $attachment['error']);
                break;
        }
        return $ret;
    }
    if(!is_uploaded_file($attachment['tmp_name']) || empty($attachment['tmp_name']))
    {
        $ret['error'] = $lang->error_uploadfailed.$lang->error_uploadfailed_php4;
        return $ret;
    }
    $ext = get_extension($attachment['name']);
    // Check if we have a valid extension
    $query = $db->simple_select(TABLE_PREFIX."attachtypes", "*", "extension='".$db->escape_string($ext)."'");
    $attachtype = $db->fetch_array($query);
    if(!$attachtype['atid'])
    {
        $ret['error'] = $lang->error_attachtype;
        return $ret;
    }
    // Check the size
    if($attachment['size'] > $attachtype['maxsize']*1024 && $attachtype['maxsize'] != "")
    {
        $ret['error'] = sprintf($lang->error_attachsize, $attachtype['maxsize']);
        return $ret;
    }

    // Double check attachment space usage
    if($mybb->usergroup['attachquota'] > 0)
    {
        $query = $db->simple_select(TABLE_PREFIX."attachments", "SUM(filesize) AS ausage", "uid='".$mybb->user['uid']."'");
        $usage = $db->fetch_array($query);
        $usage = $usage['ausage']+$attachment['size'];
        if($usage > ($mybb->usergroup['attachquota']*1024))
        {
            $friendlyquota = get_friendly_size($mybb->usergroup['attachquota']*1024);
            $ret['error'] = sprintf($lang->error_reachedattachquota, $friendlyquota);
            return $ret;
        }
    }

    // Check if an attachment with this name is already in the post
    $query = $db->simple_select(TABLE_PREFIX."attachments", "*", "filename='".$db->escape_string($attachment['name'])."' AND (posthash='$posthash' OR (pid='$pid' AND pid!='0'))");
    $prevattach = $db->fetch_array($query);
    if($prevattach['aid'])
    {
        $ret['error'] = $lang->error_alreadyuploaded;
        return $ret;
    }

    // All seems to be good, lets move the attachment!
    $filename = "post_".$mybb->user['uid']."_".time().".attach";
    $file = upload_file($attachment, $mybb->settings['uploadspath'], $filename);
    if($file['error'])
    {
        $ret['error'] = $lang->error_uploadfailed.$lang->error_uploadfailed_detail;
        switch($file['error'])
        {
            case 1:
                $ret['error'] .= $lang->error_uploadfailed_nothingtomove;
                break;
            case 2:
                $ret['error'] .= $lang->error_uploadfailed_movefailed;
                break;
        }
        return $ret;
    }

    // Lets just double check that it exists
    if(!file_exists($mybb->settings['uploadspath']."/".$filename))
    {
        $ret['error'] = $lang->error_uploadfailed.$lang->error_uploadfailed_detail.$lang->error_uploadfailed_lost;
        return $ret;
    }

    // Generate the array for the insert_query
    $attacharray = array(
        "pid" => intval($pid),
        "posthash" => $posthash,
        "uid" => $mybb->user['uid'],
        "filename" => $db->escape_string($file['original_filename']),
        "filetype" => $db->escape_string($file['type']),
        "filesize" => intval($file['size']),
        "attachname" => $filename,
        "downloads" => 0,
    );

    // If we're uploading an image, check the MIME type compared to the image type and attempt to generate a thumbnail
    if($ext == "gif" || $ext == "png" || $ext == "jpg" || $ext == "jpeg" || $ext == "jpe")
    {
        // Check a list of known MIME types to establish what kind of image we're uploading
        switch(strtolower($file['type']))
        {
            case "image/gif":
                $img_type =  1;
                break;
            case "image/jpeg":
            case "image/x-jpg":
            case "image/x-jpeg":
            case "image/pjpeg":
            case "image/jpg":
                $img_type = 2;
                break;
            case "image/png":
            case "image/x-png":
                $img_type = 3;
                break;
            default:
                $img_type = 0;
        }

        // Check if the uploaded file type matches the correct image type (returned by getimagesize)
        $img_dimensions = @getimagesize($mybb->settings['uploadspath']."/".$filename);
        if(!is_array($img_dimensions) || $img_dimensions[2] != $img_type)
        {
            @unlink($mybb->settings['uploadspath']."/".$filename);
            $ret['error'] = $lang->error_uploadfailed;
            return $ret;        
        }        
        require_once MYBB_ROOT."inc/functions_image.php";
        $thumbname = str_replace(".attach", "_thumb.$ext", $filename);
        $thumbnail = generate_thumbnail($mybb->settings['uploadspath']."/".$filename, $mybb->settings['uploadspath'], $thumbname, $mybb->settings['attachthumbh'], $mybb->settings['attachthumbw']);
        if($thumbnail['filename'])
        {
            $attacharray['thumbnail'] = $thumbnail['filename'];
        }
        elseif($thumbnail['code'] == 4)
        {
            $attacharray['thumbnail'] = "SMALL";
        }
    }
    if($forum['modattachments'] == "yes" && is_moderator($forum['fid'], "", $mybb->user['uid']) != "yes")
    {
        $attacharray['visible'] = 0;
    }
    else
    {
        $attacharray['visible'] = 1;
    }

    $db->insert_query(TABLE_PREFIX."attachments", $attacharray);
    
    if($attacharray['pid'] > 0) 
    {
        $post = get_post($attacharray['pid']); 
        update_thread_counters($post['tid'], array("attachmentcount" => +1)); 
    }

    $aid = $db->insert_id();
    $ret['aid'] = $aid;
    return $ret;
}

/**
 * Actually move a file to the uploads directory
 *
 * @param array The PHP $_FILE array for the file
 * @param string The path to save the file in
 * @param string The filename for the file (if blank, current is used)
 */
function upload_file($file, $path, $filename="")
{
    if(empty($file['name']) || $file['name'] == "none" || $file['size'] < 1)
    {
        $upload['error'] = 1;
        return $upload;
    }

    if(!$filename)
    {
        $filename = $file['name'];
    }
    $upload['original_filename'] = preg_replace("#/$#", "", $file['name']); // Make the filename safe
    $filename = preg_replace("#/$#", "", $filename); // Make the filename safe
    $moved = @move_uploaded_file($file['tmp_name'], $path."/".$filename);
    if(!$moved)
    {
        $upload['error'] = 2;
        return $upload;
    }
    @chmod($path."/".$filename, 0777);
    $upload['filename'] = $filename;
    $upload['path'] = $path;
    $upload['type'] = $file['type'];
    $upload['size'] = $file['size'];
    return $upload;
}
?>