function emarking_create_anonymous_page_from_storedfile(stored_file $file)
{
if (!$file) {
throw new Exception('Stored file does not exist');
}
// Get file storage and copy file to temp folder.
$fs = get_file_storage();
$tmppath = $file->copy_content_to_temp('emarking', 'anonymous');
// Treat the file as an image, get its size and draw a white rectangle.
$size = getimagesize($tmppath);
$image = imagecreatefrompng($tmppath);
$white = imagecolorallocate($image, 255, 255, 255);
$y2 = round($size[1] / 10, 0);
imagefilledrectangle($image, 0, 0, $size[0], $y2, $white);
// Save the new image to replace the file.
if (!imagepng($image, $tmppath)) {
return false;
}
clearstatcache();
$filenameanonymous = emarking_get_anonymous_filename($file->get_filename());
// Copy file from temp folder to Moodle's filesystem.
$filerecordanonymous = array('contextid' => $file->get_contextid(), 'component' => 'mod_emarking', 'filearea' => 'pages', 'itemid' => $file->get_itemid(), 'filepath' => '/', 'filename' => $filenameanonymous, 'timecreated' => $file->get_timecreated(), 'timemodified' => time(), 'userid' => $file->get_userid(), 'author' => $file->get_author(), 'license' => 'allrightsreserved');
$previousfile = $fs->get_file($file->get_contextid(), 'mod_emarking', 'pages', $file->get_itemid(), '/', $filenameanonymous);
if ($previousfile) {
$previousfile->delete();
}
$fileinfo = $fs->create_file_from_pathname($filerecordanonymous, $tmppath);
return $fileinfo;
}
