/editquestion.php
* @package questionbank
* @subpackage importexport
*/
function get_course_media_files($courseid)
{
// this code lifted from mod/quiz/question.php and modified
global $CFG;
$images = null;
make_upload_directory("$course->id"); // Just in case
$coursefiles = get_directory_list("$CFG->dataroot/$courseid", $CFG->moddata);
foreach ($coursefiles as $filename) {
if (is_media_by_extension($filename)) {
$images["$filename"] = $filename;
}
}
return $images;
}
/**
* determines whether or not a file is an image, based on the file extension
*
* @param string $file the filename
* @return boolean
*/
function is_image_by_extension($file) {
$extensionsregex = '/\.(gif|jpg|jpeg|jpe|png|tif|tiff|bmp|xbm|rgb|svf)$/';
if (preg_match($extensionsregex, $file)) {
return true;
}
return false;
}
/**
* determines whether or not a file is a media file, based on the file extension
*
* @param string $file the filename
* @return boolean
*/
function is_media_by_extension($file) {
$extensionsregex = '/\.(gif|jpg|jpeg|jpe|png|tif|tiff|bmp|xbm|rgb|svf|swf|mov|mpg|mpeg|wmf|avi|mpe|flv|mp3|ra|ram)$/';
if (preg_match($extensionsregex, $file)) {
return true;
}
return false;
}
/**
* determines whether or not a file is a multimedia file, based on the file extension
*
* @param string $file the filename
* @return boolean
*/
function is_multimedia_by_extension($file) {
$extensionsregex = '/\.(swf|mov|mpg|mpeg|wmf|avi|mpe|flv)$/';
if (preg_match($extensionsregex, $file)) {
return true;
}
return false;
}
/**
* determines whether or not a file is a multimedia file of a type php can get the dimension for, based on the file extension
*
* @param string $file the filename
* @return boolean
*/
function is_sizable_multimedia($file) {
$extensionsregex = '/\.(swf)$/';
if (preg_match($extensionsregex, $file)) {
return true;
}
return false;
}
/**
* creates a media tag to use for choice media
*
* @param string $file the filename
* @param string $courseid the course id
* @param string $alt to specify the alt tag
* @return string either an image tag, or html for an embedded object
*/
function get_media_tag($file, $courseid = 0, $alt = 'media file', $width = 0, $height = 0) {
global $CFG;
// if it's a moodle library file, it will be served through file.php
if (substr(strtolower($file), 0, 7) == 'http://') {
$media = $file;
} else {
require_once($CFG->libdir.'/filelib.php');
$media = get_file_url("$courseid/$file");
}
$ismultimedia = false;
if (!$isimage = is_image_by_extension($file)) {
$ismultimedia = is_multimedia_by_extension($file);
}
// if there is no known width and height, try to get one
if ($width == 0) {
if ($isimage || is_sizable_multimedia($file)) {
}
}
// create either an image link or a generic link.
// if the moodle multimedia filter is turned on, it'll catch multimedia content in the generic link
if (is_image_by_extension($file)) {
return "![\"$alt\"](\"$media\")
";
}
else {
require_once("$CFG->dirroot/mod/quiz/format/qti/custommediafilter.php");
return custom_mediaplugin_filter('', $courseid, $width, $height);
}
}
/**
* determines the x and y size of the given file
*
* @param string $file the filename
* @return array looks like array('x'=>171, 'y'=>323), or array('x'=>0, 'y'=>0) if size can't be determined
*/
function get_file_dimensions($file) {
$imginfo = @getimagesize($file);
if ($imginfo !== FALSE) {
return array('x'=>$imginfo[0], 'y'=>$imginfo[1]);
} else {
return array('x'=> 0, 'y'=> 0);
}
}
?>