<?php
/**
 * Upload.inc.php
 * Code by Strangecode :: www.strangecode.com :: This document contains copyrighted information
 */

/**
 * The Upload class provides an interface to deal with http uploaded files.
 *
 * @author  Quinn Comendant <quinn@strangecode.com>
 * @requires App.inc.php
 * @version 1.0
 */

require_once dirname(__FILE__) . '/App.inc.php';

class Upload {

    // Display error messages to the user?
    var $display_messages = true;

    // Existing files with the same name will be overwritten?
    var $allow_overwriting = false;

    // Disk path where new image(s) will be uploaded.
    var $upload_directory_path = null;

    // Array of files with errors.
    var $errors = array();

    // Array of acceptable file extensions (lowercase).
    var $valid_file_extensions = array('jpg', 'jpeg', 'gif', 'png', 'pdf', 'txt', 'text', 'html', 'htm');

    // The uploaded files will be owned by user 'apache'. Set world-read/write
    // if the website admin needs to read/delete these files.
    var $dest_file_perms = 0600;

    // Array of file extensions and corresponding mime-types.
    var $mime_extension_map = array(
        'Z'       => 'application/x-compress',
        'ai'      => 'application/postscript',
        'aif'     => 'audio/x-aiff',
        'aifc'    => 'audio/x-aiff',
        'aiff'    => 'audio/x-aiff',
        'asc'     => 'text/plain',
        'asf'     => 'video/x-ms-asf',
        'asx'     => 'video/x-ms-asf',
        'au'      => 'audio/basic',
        'avi'     => 'video/x-msvideo',
        'bcpio'   => 'application/x-bcpio',
        'bin'     => 'application/octet-stream',
        'bmp'     => 'image/bmp',
        'cdf'     => 'application/x-netcdf',
        'class'   => 'application/octet-stream',
        'cpio'    => 'application/x-cpio',
        'cpt'     => 'application/mac-compactpro',
        'csh'     => 'application/x-csh',
        'css'     => 'text/css',
        'dcr'     => 'application/x-director',
        'diff'    => 'text/diff',
        'dir'     => 'application/x-director',
        'dll'     => 'application/octet-stream',
        'dms'     => 'application/octet-stream',
        'doc'     => 'application/msword',
        'dvi'     => 'application/x-dvi',
        'dxr'     => 'application/x-director',
        'eps'     => 'application/postscript',
        'etx'     => 'text/x-setext',
        'exe'     => 'application/octet-stream',
        'ez'      => 'application/andrew-inset',
        'gif'     => 'image/gif',
        'gtar'    => 'application/x-gtar',
        'gz'      => 'application/x-gzip',
        'hdf'     => 'application/x-hdf',
        'hqx'     => 'application/mac-binhex40',
        'htm'     => 'text/html',
        'html'    => 'text/html',
        'ice'     => 'x-conference/x-cooltalk',
        'ics'     => 'text/calendar',
        'ief'     => 'image/ief',
        'ifb'     => 'text/calendar',
        'iges'    => 'model/iges',
        'igs'     => 'model/iges',
        'jpe'     => 'image/jpeg',
        'jpeg'    => 'image/jpeg',
        'jpg'     => 'image/jpeg',
        'js'      => 'application/x-javascript',
        'kar'     => 'audio/midi',
        'latex'   => 'application/x-latex',
        'lha'     => 'application/octet-stream',
        'log'     => 'text/plain',
        'lzh'     => 'application/octet-stream',
        'm3u'     => 'audio/x-mpegurl',
        'man'     => 'application/x-troff-man',
        'me'      => 'application/x-troff-me',
        'mesh'    => 'model/mesh',
        'mid'     => 'audio/midi',
        'midi'    => 'audio/midi',
        'mif'     => 'application/vnd.mif',
        'mov'     => 'video/quicktime',
        'movie'   => 'video/x-sgi-movie',
        'mp2'     => 'audio/mpeg',
        'mp3'     => 'audio/mpeg',
        'mpe'     => 'video/mpeg',
        'mpeg'    => 'video/mpeg',
        'mpg'     => 'video/mpeg',
        'mp4'     => 'video/mp4',
        'mpga'    => 'audio/mpeg',
        'ms'      => 'application/x-troff-ms',
        'msh'     => 'model/mesh',
        'mxu'     => 'video/vnd.mpegurl',
        'nc'      => 'application/x-netcdf',
        'oda'     => 'application/oda',
        'patch'   => 'text/diff',
        'pbm'     => 'image/x-portable-bitmap',
        'pdb'     => 'chemical/x-pdb',
        'pdf'     => 'application/pdf',
        'pgm'     => 'image/x-portable-graymap',
        'pgn'     => 'application/x-chess-pgn',
        'php'     => 'application/x-httpd-php',
        'php3'    => 'application/x-httpd-php3',
        'pl'      => 'application/x-perl',
        'pm'      => 'application/x-perl',
        'png'     => 'image/png',
        'pnm'     => 'image/x-portable-anymap',
        'po'      => 'text/plain',
        'ppm'     => 'image/x-portable-pixmap',
        'ppt'     => 'application/vnd.ms-powerpoint',
        'ps'      => 'application/postscript',
        'qt'      => 'video/quicktime',
        'ra'      => 'audio/x-realaudio',
        'ram'     => 'audio/x-pn-realaudio',
        'ras'     => 'image/x-cmu-raster',
        'rgb'     => 'image/x-rgb',
        'rm'      => 'audio/x-pn-realaudio',
        'roff'    => 'application/x-troff',
        'rpm'     => 'audio/x-pn-realaudio-plugin',
        'rtf'     => 'text/rtf',
        'rtx'     => 'text/richtext',
        'sgm'     => 'text/sgml',
        'sgml'    => 'text/sgml',
        'sh'      => 'application/x-sh',
        'shar'    => 'application/x-shar',
        'shtml'   => 'text/html',
        'silo'    => 'model/mesh',
        'sit'     => 'application/x-stuffit',
        'skd'     => 'application/x-koan',
        'skm'     => 'application/x-koan',
        'skp'     => 'application/x-koan',
        'skt'     => 'application/x-koan',
        'smi'     => 'application/smil',
        'smil'    => 'application/smil',
        'snd'     => 'audio/basic',
        'so'      => 'application/octet-stream',
        'spl'     => 'application/x-futuresplash',
        'src'     => 'application/x-wais-source',
        'stc'     => 'application/vnd.sun.xml.calc.template',
        'std'     => 'application/vnd.sun.xml.draw.template',
        'sti'     => 'application/vnd.sun.xml.impress.template',
        'stw'     => 'application/vnd.sun.xml.writer.template',
        'sv4cpio' => 'application/x-sv4cpio',
        'sv4crc'  => 'application/x-sv4crc',
        'swf'     => 'application/x-shockwave-flash',
        'sxc'     => 'application/vnd.sun.xml.calc',
        'sxd'     => 'application/vnd.sun.xml.draw',
        'sxg'     => 'application/vnd.sun.xml.writer.global',
        'sxi'     => 'application/vnd.sun.xml.impress',
        'sxm'     => 'application/vnd.sun.xml.math',
        'sxw'     => 'application/vnd.sun.xml.writer',
        't'       => 'application/x-troff',
        'tar'     => 'application/x-tar',
        'tcl'     => 'application/x-tcl',
        'tex'     => 'application/x-tex',
        'texi'    => 'application/x-texinfo',
        'texinfo' => 'application/x-texinfo',
        'tgz'     => 'application/x-gtar',
        'tif'     => 'image/tiff',
        'tiff'    => 'image/tiff',
        'tr'      => 'application/x-troff',
        'tsv'     => 'text/tab-separated-values',
        'txt'     => 'text/plain',
        'ustar'   => 'application/x-ustar',
        'vcd'     => 'application/x-cdlink',
        'vcf'     => 'text/x-vcard',
        'vcs'     => 'text/calendar',
        'vfb'     => 'text/calendar',
        'vrml'    => 'model/vrml',
        'vsd'     => 'application/vnd.visio',
        'wav'     => 'audio/x-wav',
        'wax'     => 'audio/x-ms-wax',
        'wbmp'    => 'image/vnd.wap.wbmp',
        'wbxml'   => 'application/vnd.wap.wbxml',
        'wm'      => 'video/x-ms-wm',
        'wma'     => 'audio/x-ms-wma',
        'wmd'     => 'application/x-ms-wmd',
        'wml'     => 'text/vnd.wap.wml',
        'wmlc'    => 'application/vnd.wap.wmlc',
        'wmls'    => 'text/vnd.wap.wmlscript',
        'wmlsc'   => 'application/vnd.wap.wmlscriptc',
        'wmv'     => 'video/x-ms-wmv',
        'wmx'     => 'video/x-ms-wmx',
        'wmz'     => 'application/x-ms-wmz',
        'wrl'     => 'model/vrml',
        'wvx'     => 'video/x-ms-wvx',
        'xbm'     => 'image/x-xbitmap',
        'xht'     => 'application/xhtml+xml',
        'xhtml'   => 'application/xhtml+xml',
        'xls'     => 'application/vnd.ms-excel',
        'xml'     => 'application/xml',
        'xpm'     => 'image/x-xpixmap',
        'xsl'     => 'text/xml',
        'xwd'     => 'image/x-xwindowdump',
        'xyz'     => 'chemical/x-xyz',
        'zip'     => 'application/zip'
    );

    /**
     *
     */
    function setUploadPath($path)
    {
        $path = realpath($path);

        if (!is_dir($path)) {
            logMsg(sprintf('Upload directory invalid: %s', $path), LOG_ERR, __FILE__, __LINE__);
        }
        if (!is_writable($path)) {
            logMsg(sprintf('Upload directory not writable: %s', $path), LOG_ERR, __FILE__, __LINE__);
        }

        // Set the default upload path, stripping any extra slashes if needed.
        $this->upload_directory_path = preg_replace('!/+$!', '', $path);
    }

    /**
     *
     */
    function process($form_name, $custom_file_name=null)
    {
        // Ensure we have a upload directory.
        if (!isset($this->upload_directory_path)) {
            logMsg(sprintf('Upload directory not set before processing.'), LOG_ERR, __FILE__, __LINE__);
            if ($this->display_messages) {
                raiseMsg(_("There was a problem with the file upload. Please try again later."), MSG_ERR, __FILE__, __LINE__);
            }
            return false;
        }

        if (!isset($_FILES[$form_name])) {
            logMsg(sprintf(_("Form element %s not posted."), $form_name), LOG_ERR, __FILE__, __LINE__);
            if ($this->display_messages) {
                raiseMsg(_("There was a problem with the file upload. Please try again."), MSG_ERR, __FILE__, __LINE__);
            }
            return false;
        }

        if (is_array($_FILES[$form_name]['name'])) {
            $files = $_FILES[$form_name];
        } else {
            // Convert variables to single-cell array so it will loop.
            $files = array(
                'name'      => array($_FILES[$form_name]['name']),
                'type'      => array($_FILES[$form_name]['type']),
                'tmp_name'  => array($_FILES[$form_name]['tmp_name']),
                'error'     => array($_FILES[$form_name]['error']),
                'size'      => array($_FILES[$form_name]['size']),
            );
        }

        // To keep this script running even if user tries to stop browser.
        ignore_user_abort(true);
        if (!ini_get('safe_mode')) {
            set_time_limit(300);
        }

        $new_file_names = array();

        $num = sizeof($files['name']);
        for ($i=0; $i<$num; $i++) {
            $file_path_name = '';

            if ('' == trim($files['name'][$i])) {
                // User may not have attached a file.
                continue;
            }

            // Check The php upload error messages.
            if (UPLOAD_ERR_INI_SIZE === $files['error'][$i]) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading: it exceeds the maximum allowed upload filesize of %s."), $files['name'][$i], ini_get('upload_max_filesize')), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The file %s failed uploading with PHP error %s UPLOAD_ERR_INI_SIZE (currently %s)."), $files['error'][$i], $files['name'][$i], ini_get('upload_max_filesize')), LOG_ERR, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }
            if (UPLOAD_ERR_FORM_SIZE === $files['error'][$i]) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading: it exceeds the maximum allowed upload filesize of %s."), $files['name'][$i], $_POST['MAX_FILE_SIZE']), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The file %s failed uploading with PHP error %s UPLOAD_ERR_FORM_SIZE (currently %s)."), $files['error'][$i], $files['name'][$i], $_POST['MAX_FILE_SIZE']), LOG_ERR, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }
            if (UPLOAD_ERR_PARTIAL === $files['error'][$i]) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading: it was only partially uploaded."), $files['name'][$i]), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The file %s failed uploading with PHP error %s UPLOAD_ERR_PARTIAL."), $files['error'][$i], $files['name'][$i]), LOG_ERR, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }
            if (UPLOAD_ERR_NO_FILE === $files['error'][$i]) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading: no file was uploaded."), $files['name'][$i]), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The file %s failed uploading with PHP error %s UPLOAD_ERR_NO_FILE."), $files['error'][$i], $files['name'][$i]), LOG_ERR, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }
            if (UPLOAD_ERR_NO_TMP_DIR === $files['error'][$i]) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading: temporary upload directory missing."), $files['name'][$i]), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The file %s failed uploading with PHP error %s UPLOAD_ERR_NO_TMP_DIR."), $files['error'][$i], $files['name'][$i]), LOG_ERR, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }

            // Check to be sure it's an uploaded file.
            if (!is_uploaded_file($files['tmp_name'][$i])) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading."), $files['name'][$i]), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The file %s failed is_uploaded_file."), $files['name'][$i]), LOG_ERR, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }

            // Check to be sure the file is not empty.
            if ($files['size'][$i] < 1) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading: it contains zero bytes."), $files['name'][$i]), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The uploaded file %s contains zero bytes."), $files['name'][$i]), LOG_ERR, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }

            // Check to be sure the file has a valid file extension.
            if (!in_array(strtolower($this->getFilenameExtension($files['name'][$i])), $this->valid_file_extensions)) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading: it is an unrecognised type. Files must have one of the following file extensions: %s."), $files['name'][$i], join(', ', $this->valid_file_extensions)), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The uploaded file %s has an unrecognised file extension."), $files['name'][$i]), LOG_WARNING, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }

            // Check to be sure the file has a unique file name.
            if (!$this->allow_overwriting && $this->exists($files['name'][$i])) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading: a file with that name already exists."), $files['name'][$i]), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("The uploaded file %s doesn't have a unique filename."), $files['name'][$i]), LOG_WARNING, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }

            // Determine file name.
            if ($num == 1) {
                // Single upload.
                if (isset($custom_file_name)) {
                    if (is_array($custom_file_name) && sizeof($custom_file_name) == 1 && '' != trim($custom_file_name[0])) {
                        // Is an array, but just one value. Pull it out.
                        $file_name = trim($custom_file_name[0]);
                        if ($this->display_messages) {
                            raiseMsg(sprintf(_("The file %s has been renamed to %s."), $files['name'][$i], $file_name), MSG_NOTICE, __FILE__, __LINE__);
                        }
                        logMsg(sprintf('Using custom file name: %s', $file_name), LOG_DEBUG, __FILE__, __LINE__);
                    } else if (!is_array($custom_file_name) && '' != trim($custom_file_name)) {
                        // Valid custom file name.
                        $file_name = $custom_file_name;
                        if ($this->display_messages) {
                            raiseMsg(sprintf(_("The file %s has been renamed to %s."), $files['name'][$i], $file_name), MSG_NOTICE, __FILE__, __LINE__);
                        }
                        logMsg(sprintf('Using custom file name: %s', $file_name), LOG_DEBUG, __FILE__, __LINE__);
                    } else {
                        // Invalid custom file name provided. Use uploaded file name.
                        $file_name = $files['name'][$i];
                        logMsg(sprintf('Custom filename invalid! Using uploaded file name: %s', $file_name), LOG_WARNING, __FILE__, __LINE__);
                    }
                } else {
                    // Normal case. Use uploaded file name.
                    $file_name = $files['name'][$i];
                    logMsg(sprintf('Using uploaded file name: %s', $file_name), LOG_DEBUG, __FILE__, __LINE__);
                }
            } else {
                // Multiple upload. Final file names must be array.
            	if (isset($custom_file_name) && is_array($custom_file_name) && '' != $custom_file_name[$i]) {
                    // Valid custom file name.
            		$file_name = $custom_file_name[$i];
                    if ($this->display_messages) {
                        raiseMsg(sprintf(_("The file <strong>%s</strong> has been renamed to <strong>%s</strong>."), $files['name'][$i], $file_name), MSG_NOTICE, __FILE__, __LINE__);
                    }
            	    logMsg(sprintf('Using custom file name: %s', $file_name), LOG_DEBUG, __FILE__, __LINE__);
            	} else {
            	    // Invalid custom file name provided. Use uploaded file name.
            		$file_name = $files['name'][$i];
            	    logMsg(sprintf('Using uploaded file name: %s', $file_name), LOG_DEBUG, __FILE__, __LINE__);
            	}
            }

            // Clean the file name of bad characters.
            $file_name = $this->cleanFileName($file_name);

            // If the file name has no extension, use the mime-type extension.
            if (!preg_match('/\.[^.]{1,5}$/', $file_name) && function_exists('mime_content_type')) {
                if ($ext = array_search(mime_content_type($files['type'][$i]), $this->mime_extension_map)) {
                    $file_name .= ".$ext";
                }
            }

            // Set the path and file name.
            $file_path_name = $this->upload_directory_path . '/' . $file_name;

            // Move the file to the final place.
            if (move_uploaded_file($files['tmp_name'][$i], $file_path_name)) {
                chmod($file_path_name, $this->dest_file_perms);
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> uploaded successfully."), $files['name'][$i]), MSG_SUCCESS, __FILE__, __LINE__);
                }
                if (!isset($custom_file_name) && $files['name'][$i] != $file_name) {
                    // Notify user if uploaded file name was modified (unless a custom file name will be used anyways).
                    if ($this->display_messages) {
                        raiseMsg(sprintf(_("The file <strong>%s</strong> was renamed to <strong>%s</strong>."), $files['name'][$i], $file_name), MSG_NOTICE, __FILE__, __LINE__);
                        logMsg(sprintf('File successfully renamed: %s -> %s', $files['tmp_name'][$i], $file_path_name), LOG_DEBUG, __FILE__, __LINE__);
                    }
                }
                $new_file_names[] = array(
                    'name' => $file_name,
                    'mime' => $files['type'][$i],
                    'size' => filesize($file_path_name),
                    'extension' => $this->getFilenameExtension($file_name),
                    'original_index' => $i,
                );
                continue;
            } else {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("The file <strong>%s</strong> failed uploading."), $files['name'][$i]), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("Moving file failed: %s -> %s"), $files['tmp_name'][$i], $file_path_name), LOG_ALERT, __FILE__, __LINE__);
                $this->errors[] = $files['name'][$i];
                continue;
            }
        }
        return (sizeof($new_file_names) > 0) ? $new_file_names : false;
    }

    /**
     *
     */
    function deleteFile($file_name)
    {
        // Ensure we have a upload directory.
        if (!isset($this->upload_directory_path)) {
            logMsg(sprintf('Upload directory not set before processing.'), LOG_ERR, __FILE__, __LINE__);
            return false;
        }

        $file_path_name = $this->upload_directory_path . '/' . $file_name;

        if (!is_file($file_path_name)) {
            logMsg(sprintf(_("Error deleting nonexistant file: %s"), $file_path_name), LOG_ERR, __FILE__, __LINE__);
            return false;
        } else if (unlink($file_path_name)) {
            logMsg(sprintf('Deleted file: %s', $file_path_name), LOG_DEBUG, __FILE__, __LINE__);
        } else {
            if ($this->display_messages) {
                raiseMsg(sprintf(_("The file <strong>%s</strong> could not be deleted."), $file_name), MSG_ERROR, __FILE__, __LINE__);
            }
            logMsg(sprintf(_("Failed deleting file: %s"), $file_path_name), LOG_ERR, __FILE__, __LINE__);
            return false;
        }
    }

    /**
     *
     */
    function moveFile($old_name, $new_name)
    {
        // Ensure we have an upload directory.
        if (!isset($this->upload_directory_path)) {
            logMsg(sprintf('Upload directory not set before processing.'), LOG_ERR, __FILE__, __LINE__);
            return false;
        }

        $old_file_path_name = $this->upload_directory_path . '/' . $old_name;
        $new_file_path_name = $this->upload_directory_path . '/' . $new_name;
        if (file_exists($old_file_path_name)) {
            if (!rename($old_file_path_name, $new_file_path_name)) {
                if ($this->display_messages) {
                    raiseMsg(sprintf(_("Error renaming file to %s"), $new_file_path_name), MSG_ERR, __FILE__, __LINE__);
                }
                logMsg(sprintf(_("Error renaming file to %s"), $new_file_path_name), LOG_ERR, __FILE__, __LINE__);
                return false;
            }
        } else {
            if ($this->display_messages) {
                raiseMsg(sprintf(_("Couldn't rename nonexistant file <strong>%s</strong>."), $old_name), MSG_ERR, __FILE__, __LINE__);
            }
            logMsg(sprintf(_("Error renaming nonexistant file: %s"), $old_file_path_name), LOG_ERR, __FILE__, __LINE__);
            return false;
        }
    }

    /**
     *
     */
    function exists($file_name)
    {
        // Ensure we have a upload directory.
        if (!isset($this->upload_directory_path)) {
            logMsg(sprintf('Upload directory not set before processing.'), LOG_ERR, __FILE__, __LINE__);
            return false;
        }

        return file_exists($this->upload_directory_path . '/' . $file_name);
    }

    /**
     * Get filename by glob pattern. Searches a directory for an image that matches the
     * specified glob pattern and returns the filename of the first file found.
     *
     * @access  public
     * @param   string  $pattern   Pattern to match filename.
     * @return  string filename on success, empty string on failure.
     * @author  Quinn Comendant <quinn@strangecode.com>
     * @since   15 Nov 2005 20:55:22
     */
    function getFilenameGlob($pattern)
    {
        $file_list = glob(sprintf('%s/%s', $this->upload_directory_path, $pattern));
        if (isset($file_list[0])) {
            return basename($file_list[0]);
        } else {
            return '';
        }
    }

    /**
     *
     */
    function getErrors()
    {
        return $this->errors;
    }

    /**
     *
     */
    function cleanFileName($file_name)
    {
        $bad  = 'áéíóúàèìòùäëïöüÁÉÍÓÚÀÈÌÒÙÄËÏÖÜâêîôûÂÊÎÔÛñçÇ@';
        $good = 'aeiouaeiouaeiouAEIOUAEIOUAEIOUaeiouAEIOUncCa';
        $file_name = trim($file_name);
        $file_name = strtr($file_name, $bad, $good);
        $file_name = preg_replace('/[^-\w.,~_=+]+/', '_', $file_name);
        $file_name = substr($file_name, 0, 250);
        return $file_name;
    }

    /**
     *
     */
    function getFilenameExtension($file_name)
    {
        preg_match('/.*?\.(\w+)$/i', $file_name, $ext);
        return $ext[1];
    }
}

?>