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296 lines
8.4 KiB
296 lines
8.4 KiB
<?php
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/*
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vim: set expandtab tabstop=4 shiftwidth=4:
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2004 Dokeos S.A.
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Copyright (c) 2003 Ghent University (UGent)
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Copyright (c) 2001 Universite catholique de Louvain (UCL)
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
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==============================================================================
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*/
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/**
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==============================================================================
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* This is the file display library for Dokeos.
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* Include/require it in your code to use its functionality.
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*
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* @package dokeos.library
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==============================================================================
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*/
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/*
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==============================================================================
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GENERIC FUNCTIONS : FOR OLDER PHP VERSIONS
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==============================================================================
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*/
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if ( ! function_exists('array_search') )
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{
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/**
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* Searches haystack for needle and returns the key
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* if it is found in the array, FALSE otherwise.
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*
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* Natively implemented in PHP since 4.0.5 version.
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* This function is intended for previous version.
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*
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* @author - Hugues Peeters <peeters@ipm.ucl.ac.be>
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* @param - needle (mixed)
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* @param - haystack (array)
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* @return - array key or FALSE
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*
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* @see - http://www.php.net/array_search
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*/
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function array_search($needle, $haystack)
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{
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while (list($key, $val) = each($haystack))
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if ($val == $needle)
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return $key;
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return false;
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}
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}
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/*
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==============================================================================
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FILE DISPLAY FUNCTIONS
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==============================================================================
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*/
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/**
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* Define the image to display for each file extension.
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* This needs an existing image repository to work.
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*
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* @author - Hugues Peeters <peeters@ipm.ucl.ac.be>
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* @param - $file_name (string) - Name of a file
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* @return - The gif image to chose
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*/
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function choose_image($file_name)
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{
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static $type, $image;
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/* TABLES INITIALISATION */
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if (!$type || !$image)
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{
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$type['word' ] = array('doc', 'dot', 'rtf', 'mcw', 'wps', 'psw', 'docm', 'docx', 'dotm', 'dotx');
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$type['web' ] = array('htm', 'html', 'htx', 'xml', 'xsl', 'php', 'xhtml');
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$type['image' ] = array('gif', 'jpg', 'png', 'bmp', 'jpeg');
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$type['audio' ] = array('wav', 'mid', 'mp2', 'mp3', 'midi', 'sib', 'amr', 'kar');
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$type['video' ] = array('mp4', 'mov', 'rm', 'pls', 'mpg', 'mpeg', 'au', 'flv', 'avi', 'wmv', 'asf', '3gp');
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$type['excel' ] = array('xls', 'xlt', 'xls', 'xlt', 'pxl', 'xlsx', 'xlsm', 'xlam', 'xlsb', 'xltm', 'xltx');
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$type['compressed'] = array('zip', 'tar', 'rar', 'gz');
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$type['code' ] = array('js', 'cpp', 'c', 'java', 'phps');
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$type['acrobat' ] = array('pdf');
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$type['powerpoint'] = array('ppt', 'pps', 'pptm', 'pptx', 'potm', 'potx', 'ppam', 'ppsm', 'ppsx');
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$type['flash' ] = array('fla', 'swf');
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$type['text' ] = array('txt','log');
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$type['oo_writer' ] = array('odt', 'ott', 'sxw', 'stw');
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$type['oo_calc' ] = array('ods', 'ots', 'sxc', 'stc');
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$type['oo_impress'] = array('odp', 'otp', 'sxi', 'sti');
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$type['oo_draw' ] = array('odg', 'otg', 'sxd', 'std');
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$image['word' ] = 'word.gif';
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$image['web' ] = 'file_html.gif';
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$image['image' ] = 'file_image.gif';
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$image['audio' ] = 'file_sound.gif';
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$image['video' ] = 'film.gif';
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$image['excel' ] = 'excel.gif';
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$image['compressed'] = 'file_zip.gif';
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$image['code' ] = 'file_txt.gif';
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$image['acrobat' ] = 'file_pdf.gif';
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$image['powerpoint'] = 'powerpoint.gif';
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$image['flash' ] = 'file_flash.gif';
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$image['text' ] = 'file_txt.gif';
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//$image['oo_writer' ] = 'word.gif';
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//$image['oo_calc' ] = 'excel.gif';
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//$image['oo_impress'] = 'powerpoint.gif';
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$image['oo_writer' ] = 'file_oo_writer.gif';
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$image['oo_calc' ] = 'file_oo_calc.gif';
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$image['oo_impress'] = 'file_oo_impress.gif';
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$image['oo_draw' ] = 'file_oo_draw.gif';
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}
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/* FUNCTION CORE */
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$extension = array();
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if (ereg('\.([[:alnum:]]+)$', $file_name, $extension))
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{
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$extension[1] = strtolower($extension[1]);
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foreach ($type as $generic_type => $extension_list)
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{
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if (in_array($extension[1], $extension_list))
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{
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return $image[$generic_type];
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}
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}
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}
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return 'defaut.gif';
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}
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/**
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* Transform the file size in a human readable format.
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*
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* @param int Size of the file in bytes
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* @return string A human readable representation of the file size
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*/
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function format_file_size($file_size)
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{
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if($file_size >= 1073741824)
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{
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$file_size = round($file_size / 1073741824 * 100) / 100 . 'G';
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}
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elseif($file_size >= 1048576)
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{
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$file_size = round($file_size / 1048576 * 100) / 100 . 'M';
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}
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elseif($file_size >= 1024)
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{
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$file_size = round($file_size / 1024 * 100) / 100 . 'k';
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}
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else
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{
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$file_size = $file_size . 'B';
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}
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return $file_size;
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}
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/**
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* Transform a UNIX time stamp in human readable format date.
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*
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* @author - Hugues Peeters <peeters@ipm.ucl.ac.be>
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* @param - $date - UNIX time stamp
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* @return - A human readable representation of the UNIX date
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*/
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function format_date($date)
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{
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return date('d.m.Y', $date);
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}
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/**
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* Transform the file path to a URL.
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*
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* @param - $file_path (string) - Relative local path of the file on the hard disk
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* @return - Relative url
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*/
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function format_url($file_path)
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{
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$path_component = explode('/', $file_path);
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$path_component = array_map('rawurlencode', $path_component);
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return implode('/', $path_component);
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}
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/**
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* Get the most recent time the content of a folder was changed.
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*
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* @param - $dir_name (string) - Path of the dir on the hard disk
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* @param - $do_recursive (bool) - Traverse all folders in the folder?
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* @return - Time the content of the folder was changed
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*/
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function recent_modified_file_time($dir_name, $do_recursive = true)
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{
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$dir = dir($dir_name);
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$last_modified = 0;
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$return = 0;
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if (is_dir($dir)) {
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while(($entry = $dir->read()) !== false)
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{
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if ($entry != '.' && $entry != '..')
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continue;
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if (!is_dir($dir_name.'/'.$entry))
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$current_modified = filemtime($dir_name.'/'.$entry);
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elseif ($do_recursive)
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$current_modified = recent_modified_file_time($dir_name.'/'.$entry, true);
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if ($current_modified > $last_modified)
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$last_modified = $current_modified;
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}
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$dir->close();
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//prevents returning 0 (for empty directories)
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$return = ($last_modified == 0) ? filemtime($dir_name) : $last_modified;
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}
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return $return;
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}
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/**
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* Get the total size of a directory.
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*
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* @param - $dir_name (string) - Path of the dir on the hard disk
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* @return - Total size in bytes
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*/
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function folder_size($dir_name)
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{
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$size = 0;
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if ($dir_handle = opendir($dir_name))
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{
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while (($entry = readdir($dir_handle)) !== false)
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{
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if($entry == '.' || $entry == '..')
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continue;
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if(is_dir($dir_name.'/'.$entry))
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$size += folder_size($dir_name.'/'.$entry);
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else
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$size += filesize($dir_name.'/'.$entry);
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}
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closedir($dir_handle);
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}
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return $size;
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}
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/**
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* Calculates the total size of a directory by adding the sizes (that
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* are stored in the database) of all files & folders in this directory.
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*
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* @param string $path
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* @param boolean $can_see_invisible
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* @return Total size
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*/
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function get_total_folder_size($path, $can_see_invisible = false)
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{
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$table_itemproperty = Database::get_course_table(TABLE_ITEM_PROPERTY);
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$table_document = Database::get_course_table(TABLE_DOCUMENT);
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$tool_document = TOOL_DOCUMENT;
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$visibility_rule = 'props.visibility ' . ($can_see_invisible ? '<> 2' : '= 1');
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$sql = <<<EOQ
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SELECT SUM(size)
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FROM $table_itemproperty AS props, $table_document AS docs
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WHERE docs.id = props.ref
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AND props.tool = '$tool_document'
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AND path LIKE '$path/%'
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AND $visibility_rule
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EOQ;
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$result = Database::query($sql);
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if($result && Database::num_rows($result) != 0)
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{
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$row = Database::fetch_row($result);
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return $row[0] == null ? 0 : $row[0];
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}
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else
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{
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return 0;
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}
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}
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?>
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