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494 lines
11 KiB
494 lines
11 KiB
<?php
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/*
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DOKEOS - elearning and course management software
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For a full list of contributors, see documentation/credits.html
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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 "documentation/licence.html" more details.
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Contact:
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Dokeos
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Rue des Palais 44 Paleizenstraat
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B-1030 Brussels - Belgium
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Tel. +32 (2) 211 34 56
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*/
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/**
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* Code library for HotPotatoes integration.
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* @package dokeos.exercise
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* @author Istvan Mandak
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* @version $Id: hotpotatoes.lib.php 13384 2007-10-04 09:08:37Z elixir_inter $
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*/
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$dbTable = Database::get_course_table(TABLE_DOCUMENT);
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/**
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* Creates a hotpotato directory
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*
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* If a directory of that name already exists, don't create any. If a file of that name exists, remove it and create a directory
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* @param string Wanted path
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* @return boolean Always true so far
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*/
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function hotpotatoes_init($baseWorkDir)
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{
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//global $_course, $_user;
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$documentPath=$baseWorkDir.'/';
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if (!is_dir($documentPath))
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{
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if (is_file($documentPath))
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{
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@unlink($documentPath);
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}
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@mkdir($documentPath);
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$perm = api_get_setting('permissions_for_new_directories');
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$perm = octdec(!empty($perm)?$perm:'0770');
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chmod ($documentPath,$perm);
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return true;
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}else{
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//if this directory already exists, return false
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return false;
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}
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//why create a .htaccess here?
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//if (!is_file($documentPath.".htacces"))
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//{
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// if (!($fp = fopen($documentPath.".htaccess", "w"))) {
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// }
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// $str = "order deny,allow\nallow from all";
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// if (!fwrite($fp,$str)) { }
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//}
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}
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/**
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* Gets the title of the quizz file given as parameter
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* @param string File name
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* @param string File path
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* @return string The exercise title
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*/
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function GetQuizName($fname,$fpath)
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{
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$title = "";
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$title = GetComment($fname);
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if($title=="")
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{
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if (!($fp = fopen($fpath.$fname, "r"))) {
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//die("could not open Quiz input");
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return GetFileName($fname);
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}
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$contents = fread($fp, filesize($fpath.$fname));
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fclose($fp);
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$contents = strtolower($contents);
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$pattern = array ( 1 => "title>", 2 => "/title>");
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$s_contents = substr($contents,0,strpos($contents,$pattern["2"])-1);
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$e_contents = substr($s_contents,strpos($contents,$pattern["1"])+strlen($pattern["1"]),strlen($s_contents));
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$title = $e_contents;
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}
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return $title;
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}
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/**
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* Gets the comment about a file from the corresponding database record
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* @param string File path
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* @return string Comment from the database record
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*/
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function GetComment($path)
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{
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global $dbTable;
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$query = "select comment from $dbTable where path='$path'";
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$result = api_sql_query($query,__FILE__,__LINE__);
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while($row = mysql_fetch_array($result))
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{
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return $row[0];
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}
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return "";
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}
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/**
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* Sets the comment in the database for a particular path
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* @param string File path
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* @param string Comment to set
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* @return string Result of the database operation (api_sql_query will output some message directly on error anyway)
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*/
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function SetComment($path,$comment)
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{
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global $dbTable;
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$query = "update $dbTable set comment='$comment' where path='$path'";
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$result = api_sql_query($query,__FILE__,__LINE__);
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return "$result";
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}
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/**
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* Get the name of the file from a path (without the extension)
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*
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* This assumes the path is made of elements split by '/', not '\' or '\\'
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* @param string Path
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* @return string File name
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*/
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function GetFileName($fname)
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{
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$name = explode('/',$fname);
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$name = $name[sizeof($name)-1];
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return $name;
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}
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/**
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* Reads the file contents into a string
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* @param string Urlencoded path
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* @return string The file contents
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*/
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function ReadFileCont($full_file_path)
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{
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if (!($fp = fopen(urldecode($full_file_path), "r"))) {
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// if (!($fp = fopen($full_file_path, "r"))) {
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return "";
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}
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$contents = fread($fp, filesize($full_file_path));
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fclose($fp);
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return $contents;
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}
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/**
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* Writes the file contents into the file given
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* @param string Urlencoded path
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* @param string The file contents
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*/
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function WriteFileCont($full_file_path,$content)
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{
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if (!($fp = fopen(urldecode($full_file_path), "w"))) {
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//die("could not open Quiz input");
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}
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fwrite($fp,$content);
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fclose($fp);
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}
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/**
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* Gets the name of an img whose path is given (without directories or extensions)
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* @param string An image tag (<img src="...." ...>)
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* @return string The image file name or an empty string
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* @uses GetFileName No comment
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*/
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function GetImgName($imgtag)
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{ // select src tag from img tag
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$match = array();
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//preg_match('/(src=(["\'])1.*(["\'])1)/i',$imgtag,$match); //src
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preg_match('/src(\s)*=(\s)*[\'"]([^\'"]*)[\'"]/i',$imgtag,$match); //get the img src as contained between " or '
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//list($key,$srctag)=each($match);
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$src=$match[3];
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//$src = substr($srctag,5,(strlen($srctag)-7));
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if (stristr($src,"http")===false) // valid or invalid image name
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{
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if($src=="")
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{
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return "";
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}
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else
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{
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$tmp_src = GetFileName($src) ;
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if ($tmp_src == "")
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{
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return $src;
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}
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else
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{
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return $tmp_src;
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}
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}
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}
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else //the img tag contained "http", which means it is probably external. Ignore it.
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{
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return "";
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}
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}
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/**
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* Gets the source path of an image tag
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* @param string An image tag
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* @return string The image source or ""
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*/
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function GetSrcName($imgtag)
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{ // select src tag from img tag
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$match = array();
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preg_match("|(src=\".*\" )|U",$imgtag,$match); //src
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list($key,$srctag)=each($match);
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$src = substr($srctag,5,(strlen($srctag)-7));
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if (stristr($src,"http")==false) // valid or invalid image name
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{
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return $src;
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}
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else
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{
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return '';
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}
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}
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/**
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* Gets the image parameters from an image path
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* @param string File name
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* @param string File path
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* @param reference Reference to a list of image parameters (emptied, then used to return results)
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* @param reference Reference to a counter of images (emptied, then used to return results)
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*/
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function GetImgParams($fname,$fpath,&$imgparams,&$imgcount)
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{ //select img tags from context
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$imgparams = array();
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//phpinfo();
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$contents = ReadFileCont("$fpath"."$fname");
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$matches = array();
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preg_match_all("(<img .*>)",$contents,$matches);
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$imgcount = 0;
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while (list($int,$match)=each($matches))
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{
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//each match consists of a key and a value
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while(list($key,$imgtag)=each($match))
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{
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$imgname = GetImgName($imgtag);
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if ($imgname!="" && !in_array($imgname,$imgparams)){
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array_push($imgparams,$imgname); // name (+ type) of the images in the html test
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$imgcount = $imgcount + 1; // number of images in the html test
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}
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}
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}
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}
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/**
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* Generates a list of hidden fields with the image params given as parameter to this function
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* @param array List of image parameters
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* @return string String containing the hidden parameters built from the list given
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*/
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function GenerateHiddenList($imgparams)
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{
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$list = "";
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if(is_array($imgparams)){
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while (list($int,$string)=each($imgparams))
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{
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$list .= "<input type=\"hidden\" name=\"imgparams[]\" value=\"$string\" />\n";
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}
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}
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return $list;
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}
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/**
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* Searches for a node in the given array
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* @param reference Reference to the array to search
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* @param string Node we are looking for in the array
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* @return mixed Node name or false if not found
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*/
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function myarraysearch(&$array,$node)
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{
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$match = FALSE;
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$tmp_array = array();
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for($i=0;$i<count($array);$i++)
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{
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if (!strcmp($array[$i],$node))
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{
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$match = $node;
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}
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else
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{ array_push($tmp_array,$array[$i]); }
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}
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$array = $tmp_array;
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return $match;
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}
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/**
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* Look for the image name into an array
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* @param reference Reference to an array to search
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* @param string String to look for
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* @return mixed String given if found, false otherwise
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* @uses myarraysearch This function is just an additional layer on the myarraysearch() function
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*/
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function CheckImageName(&$imgparams,$string)
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{
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$checked = myarraysearch($imgparams,$string);
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return $checked;
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}
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/**
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* Replaces an image tag by ???
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* @param string The content to replace
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* @return string The modified content
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*/
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function ReplaceImgTag($content)
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{
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$newcontent = $content;
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$matches = array();
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preg_match_all("(<img .*>)",$content,$matches);
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$imgcount = 0;
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while (list($int,$match)=each($matches))
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{
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while(list($key,$imgtag)=each($match))
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{
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$imgname = GetSrcName($imgtag);
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if ($imgname=="") {} // valid or invalid image name
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else {
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$prehref = $imgname;
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$posthref = GetFileName($imgname);
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$newcontent = str_replace($prehref,$posthref,$newcontent);
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}
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}
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}
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return $newcontent;
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}
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/**
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* Fills the folder name up to a certain length with "0"
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* @param string Original folder name
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* @param integer Length to reach
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* @return string Modified folder name
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*/
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function FillFolderName($name,$nsize)
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{
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$str = "";
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for($i=0;$i < $nsize-strlen($name);$i++)
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{
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$str .= "0";
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}
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$str .= $name;
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return $str;
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}
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/**
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* Generates the HotPotato folder tree
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* @param string Folder path
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* @return string Folder name (modified)
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*/
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function GenerateHpFolder($folder)
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{
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$filelist = array();
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if ($dir = @opendir($folder)) {
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while (($file = readdir($dir)) !== false) {
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if ( $file != ".") {
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if ($file != "..")
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{
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$full_name = $folder."/".$file;
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if (is_dir($full_name))
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{
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$filelist[] = $file;
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}
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}
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}
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}
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}
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$w = 0;
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do {
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$name = FillFolderName(mt_rand(1,99999),6);
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$checked = myarraysearch($filelist,$name);
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//as long as we find the name in the array, continue looping. As soon as we have a new element, quit
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if ($checked) { $w = 1; }
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else { $w = 0; }
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} while ($w==1);
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return $name;
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}
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/**
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* Gets the folder name (strip down path)
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* @param string Path
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* @return string Folder name stripped down
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*/
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function GetFolderName($fname)
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{
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$name = explode('/',$fname);
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$name = $name[sizeof($name)-2];
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return $name;
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}
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/**
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* Gets the folder path (withouth the name of the folder itself) ?
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* @param string Path
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* @return string Path stripped down
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*/
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function GetFolderPath($fname)
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{
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$str = "";
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$name = explode('/',$fname);
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for($i=0;$i < sizeof($name)-1; $i++)
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{ $str = $str.$name[$i]."/"; }
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return $str;
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}
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/**
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* Checks if there are subfolders
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* @param string Path
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* @return integer 1 if a subfolder was found, 0 otherwise
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*/
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function CheckSubFolder($path)
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{
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$folder = GetFolderPath($path);
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$dflag = 0;
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if ($dir = @opendir($folder)) {
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while (($file = readdir($dir)) !== false) {
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if ( $file != ".") {
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if ($file != "..") {
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$full_name = $folder."/".$file;
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if (is_dir($full_name)) {
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$dflag = 1; // first directory
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}
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}
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}
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}
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}
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return $dflag;
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}
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/**
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* Hotpotato Garbage Collector
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* @param string Path
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* @param integer Flag
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* @param integer User id
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* @return void No return value, but echoes results
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*/
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function HotPotGCt($folder,$flag,$userID)
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{ // Garbage Collector
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$filelist = array();
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if ($dir = @opendir($folder)) {
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while (($file = readdir($dir)) !== false) {
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if ( $file != ".") {
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if ($file != "..")
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{
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$full_name = $folder."/".$file;
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if (is_dir($full_name))
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{
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HotPotGCt($folder."/".$file,$flag,$userID);
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}
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else
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{
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$filelist[] = $file;
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}
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}
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}
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}
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closedir($dir);
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}
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while (list ($key, $val) = each ($filelist))
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{
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if (stristr($val,$userID.".t.html"))
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{
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if ($flag == 1)
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{
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my_delete($folder."/".$val);
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}
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else
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{
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echo $folder."/".$val."<br />";
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}
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}
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}
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}
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?>
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