<?php
/* For licensing terms, see /license.txt */

// TODO: Migrate this into the scorm.class.php file.

/**
 * This file is a container for functions related to SCORM and other
 * standard or common course content types. It might later become a class
 * instead of a functions library, as several components are likely to be
 * re-used for different content types.
 * @package chamilo.learnpath.scorm
 * @author Yannick Warnier <ywarnier@beeznest.org>
 * @author Based on work from Denes NAgy, Isthvan Mandak and Roan Embrechts
 */

/**
 * Delete a scorm directory (check for imsmanifest and if found, deletes the related rows in scorm tables also)
 * @param  string	Dir path
 * @return boolean	True on success, false otherwise
 */
function removescormDir($dir) {
    global $_course;
    if(!@$opendir = opendir($dir)) {
        return false;
    }
    while($readdir = readdir($opendir)) {
        if($readdir != '..' && $readdir != '.') {
            if(is_file($dir.'/'.$readdir)) {
                $pos = strpos('/'.$readdir, 'imsmanifest.xml');
                if ($pos) {	// So we have the imsmanifest in this dir
                            // from d:/myworks/dokeos/dokeos_cvs/dokeos/dokeos/courses/CVSCODE4/scorm/LP2/LP2
                            // We have to get /LP2/LP2
                    $path = api_get_path(SYS_COURSE_PATH).$_course['official_code'].'/scorm';
                    $pos = strpos($dir, $path);
                    if ($pos == 0) {
                        $scormdir = substr($dir, strlen($path), strlen($dir) - strlen($path));
                        $courseid = $_course['official_code'];
                        $sql = "SELECT * FROM ".Database::get_scorm_table(TABLE_SCORM_MAIN)." where (contentTitle='$scormdir' and dokeosCourse='$courseid')";
                        $result = Database::query($sql);
                        while ($row = Database::fetch_array($result)) {
                            $c = $row['contentId'];
                            $sql2 = "DELETE FROM ".Database::get_scorm_table(TABLE_SCORM_SCO_DATA)." where contentId=$c";
                            $result2 = Database::query($sql2);
                        }
                        $sql = "DELETE FROM ".Database::get_scorm_table(TABLE_SCORM_MAIN)." where (contentTitle='$scormdir' and dokeosCourse='$courseid')";
                        $result = Database::query($sql);
                    }
                }
                if (!@unlink($dir.'/'.$readdir)) {
                    return false;
                }
            } elseif (is_dir($dir.'/'.$readdir)) {
                if(!removescormDir($dir.'/'.$readdir)) {
                    return false;
                }
            }
        }
    }
    closedir($opendir);
    if (!@rmdir($dir)) {
        return false;
    }
    return true;
}

/**
 * This function removes a directory if it exists
 * @param string			Dir path
 * @return boolean			True on success, false otherwise
 * @uses removescormDir()	to actually remove the directory
 */
function scorm_delete($file) {
    if (check_name_exist($file)) {
        if (is_dir($file)) {
            return removescormDir($file);
        }
    } else {
        return false; // No file or directory to delete.
    }
}

/**
 * This function gets a list of scorm paths located in a given directory
 * @param	string	Base directory path
 * @param	string	Current directory
 * @param	array	Reference to a list of paths that exist in the database
 * @return	array	Array(type=>array(),size=>array(),date=>array())
 */
function get_scorm_paths_from_dir($basedir, $curdir, &$attribute){
    $scormcontent = false;
    $saved_dir = getcwd();
    $res = @chdir (realpath($basedir.$curdir));
    if ($res === false) { return(null); }
    $handle = opendir('.');

    define('A_DIRECTORY', 1);
    define('A_FILE',      2);

    $fileList = array();
    // Fill up $fileList for displaying the files list later on.
    while ($file = readdir($handle)) {
        if ($file == '.' || $file == '..' || $file == '.htaccess') {
            continue; // Skip current and parent directories
        }

        $fileList['name'][] = $file;

        //if ($file=='imsmanifest.xml') { $scormcontent=true; }

        if(is_dir($file)) {
            $fileList['type'][] = A_DIRECTORY;
            $fileList['size'][] = false;
            $fileList['date'][] = false;
        } elseif (is_file($file)) {
            $fileList['type'][] = A_FILE;
            $fileList['size'][] = filesize($file);
            $fileList['date'][] = filectime($file);
        }

        /*
         * Make the correspondance between
         * info given by the file system
         * and info given by the DB
         */
        if (is_array($attribute) && count($attribute['path']) > 0) {
            $keyAttribute = array_search($curdir.'/'.$file, $attribute['path']);
        }

        if ($keyAttribute !== false) {
            $fileList['comment'   ][] = $attribute['comment'   ][$keyAttribute];
            $fileList['visibility'][] = $attribute['visibility'][$keyAttribute];
            unset ($attribute['comment'   ][$keyAttribute],
            $attribute['visibility'][$keyAttribute],
            $attribute['path'      ][$keyAttribute]);
        } else {
            $fileList['comment'   ][] = false;
            $fileList['visibility'][] = false;
        }
    }
    closedir($handle);
    chdir($saved_dir);
    return $fileList;
}

/**
 * Detects the SCORM version from an imsmanifest.xml file
 * @param	string	Path to imsmanifest.xml
 * @return	string	SCORM version (1.0,1.1,1.2,1.3)
 * @todo Implement this function
 */
function get_scorm_version($path){
    return '1.2';
}