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<?php
/*
* Nucleus: PHP/MySQL Weblog CMS (http://nucleuscms.org/)
* Copyright (C) 2002-2005 The Nucleus Group
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* (see nucleus/documentation/index.html#license for more info)
*/
/**
* Media classes for nucleus
*
* @license http://nucleuscms.org/license.txt GNU General Public License
* @copyright Copyright (C) 2002-2005 The Nucleus Group
* @version $Id: MEDIA.php,v 1.12.2.1 2005/08/15 10:50:12 dekarma Exp $
*/
/**
* Represents the media objects for a certain member
*/
class MEDIA {
/**
* Gets the list of collections available to the currently logged
* in member
*
* @returns array of dirname => display name
*/
function getCollectionList() {
global $member, $DIR_MEDIA;
$collections = array();
// add private directory for member
$collections[$member->getID()] = 'Private Collection';
// add global collections
if (!is_dir($DIR_MEDIA)) return $collections;
$dirhandle = opendir($DIR_MEDIA);
while ($dirname = readdir($dirhandle)) {
// only add non-numeric (numeric=private) dirs
if (@is_dir($DIR_MEDIA . $dirname) && ($dirname != '.') && ($dirname != '..') && ($dirname != 'CVS') && (!is_numeric($dirname))) {
$collections[$dirname] = $dirname;
}
}
closedir($dirhandle);
return $collections;
}
/**
* Returns an array of MEDIAOBJECT objects for a certain collection
*
* @param $collection
* name of the collection
* @param $filter
* filter on filename (defaults to none)
*/
function getMediaListByCollection($collection, $filter = '') {
global $DIR_MEDIA;
$filelist = array();
// 1. go through all objects and add them to the filelist
$mediadir = $DIR_MEDIA . $collection . '/';
// return if dir does not exist
if (!is_dir($mediadir)) return $filelist;
$dirhandle = opendir($mediadir);
while ($filename = readdir($dirhandle)) {
// only add files that match the filter
if (!@is_dir($filename) && MEDIA::checkFilter($filename, $filter))
array_push($filelist, new MEDIAOBJECT($collection, $filename, filemtime($mediadir . $filename)));
}
closedir($dirhandle);
// sort array so newer files are shown first
usort($filelist, 'sort_media');
return $filelist;
}
function checkFilter($strText, $strFilter) {
if ($strFilter == '')
return 1;
else
return is_integer(strpos(strtolower($strText), strtolower($strFilter)));
}
/**
* checks if a collection exists with the given name, and if it's
* allowed for the currently logged in member to upload files to it
*/
function isValidCollection($collectionName) {
global $member, $DIR_MEDIA;
// private collections only accept uploads from their owners
if (is_numeric($collectionName))
return ($member->getID() == $collectionName);
// other collections should exists and be writable
$collectionDir = $DIR_MEDIA . $collectionName;
return (@is_dir($collectionDir) || @is_writable($collectionDir));
}
/**
* Adds an uploaded file to the media archive
*
* @param collection
* collection
* @param uploadfile
* the postFileInfo(..) array
* @param filename
* the filename that should be used to save the file as
* (date prefix should be already added here)
*/
function addMediaObject($collection, $uploadfile, $filename) {
global $DIR_MEDIA;
// don't allow uploads to unknown or forbidden collections
if (!MEDIA::isValidCollection($collection))
return _ERROR_DISALLOWED;
// check dir permissions (try to create dir if it does not exist)
$mediadir = $DIR_MEDIA . $collection;
// try to create new private media directories if needed
if (!@is_dir($mediadir) && is_numeric($collection)) {
$oldumask = umask(0000);
if (!@mkdir($mediadir, 0777))
return _ERROR_BADPERMISSIONS;
umask($oldumask);
}
// if dir still not exists, the action is disallowed
if (!@is_dir($mediadir))
return _ERROR_DISALLOWED;
if (!is_writeable($mediadir))
return _ERROR_BADPERMISSIONS;
// add trailing slash (don't add it earlier since it causes mkdir to fail on some systems)
$mediadir .= '/';
if (file_exists($mediadir . $filename))
return _ERROR_UPLOADDUPLICATE;
// move file to directory
if (is_uploaded_file($uploadfile)) {
if (!@move_uploaded_file($uploadfile, $mediadir . $filename))
return _ERROR_UPLOADMOVEP;
} else {
if (!copy($uploadfile, $mediadir . $filename))
return _ERROR_UPLOADCOPY ;
}
// chmod uploaded file
$oldumask = umask(0000);
@chmod($mediadir . $filename, 0644);
umask($oldumask);
return '';
}
/**
* Adds an uploaded file to the media dir.
*
* @param $collection
* collection to use
* @param $filename
* the filename that should be used to save the file as
* (date prefix should be already added here)
* @param &$data
* File data (binary)
*
* NOTE: does not check if $collection is valid.
*/
function addMediaObjectRaw($collection, $filename, &$data) {
global $DIR_MEDIA;
// check dir permissions (try to create dir if it does not exist)
$mediadir = $DIR_MEDIA . $collection;
// try to create new private media directories if needed
if (!@is_dir($mediadir) && is_numeric($collection)) {
$oldumask = umask(0000);
if (!@mkdir($mediadir, 0777))
return _ERROR_BADPERMISSIONS;
umask($oldumask);
}
// if dir still not exists, the action is disallowed
if (!@is_dir($mediadir))
return _ERROR_DISALLOWED;
if (!is_writeable($mediadir))
return _ERROR_BADPERMISSIONS;
// add trailing slash (don't add it earlier since it causes mkdir to fail on some systems)
$mediadir .= '/';
if (file_exists($mediadir . $filename))
return _ERROR_UPLOADDUPLICATE;
// create file
$fh = @fopen($mediadir . $filename, 'wb');
if (!$fh)
return _ERROR_UPLOADFAILED;
$ok = @fwrite($fh, $data);
@fclose($fh);
if (!$ok)
return _ERROR_UPLOADFAILED;
// chmod uploaded file
$oldumask = umask(0000);
@chmod($mediadir . $filename, 0644);
umask($oldumask);
return '';
}
}
/**
* Represents the characteristics of one single media-object
*
* Description of properties:
* - filename: filename, without paths
* - timestamp: last modification (unix timestamp)
* - collection: collection to which the file belongs (can also be a owner ID, for private collections)
* - private: true if the media belongs to a private member collection
*/
class MEDIAOBJECT {
var $private;
var $collection;
var $filename;
var $timestamp;
function MEDIAOBJECT($collection, $filename, $timestamp) {
$this->private = is_numeric($collection);
$this->collection = $collection;
$this->filename = $filename;
$this->timestamp = $timestamp;
}
}
/**
* User-defined sort method to sort an array of MEDIAOBJECTS
*/
function sort_media($a, $b) {
if ($a->timestamp == $b->timestamp) return 0;
return ($a->timestamp > $b->timestamp) ? -1 : 1;
}
?>
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