/**
* Is this filename valid (contains a unique participant ID) for import?
*
* @param assign $assignment - The assignment instance
* @param stored_file $fileinfo - The fileinfo
* @param array $participants - A list of valid participants for this module indexed by unique_id
* @param stdClass $user - Set to the user that matches by participant id
* @param assign_plugin $plugin - Set to the plugin that exported the file
* @param string $filename - Set to truncated filename (prefix stripped)
* @return true If the participant Id can be extracted and this is a valid user
*/
public function is_valid_filename_for_import($assignment, $fileinfo, $participants, &$user, &$plugin, &$filename)
{
if ($fileinfo->is_directory()) {
return false;
}
// Ignore hidden files.
if (strpos($fileinfo->get_filename(), '.') === 0) {
return false;
}
// Ignore hidden files.
if (strpos($fileinfo->get_filename(), '~') === 0) {
return false;
}
$info = explode('_', $fileinfo->get_filepath() . $fileinfo->get_filename(), 5);
if (count($info) < 5) {
return false;
}
$participantid = $info[1];
$filename = $info[4];
$plugin = $assignment->get_plugin_by_type($info[2], $info[3]);
if (!is_numeric($participantid)) {
return false;
}
if (!$plugin) {
return false;
}
// Convert to int.
$participantid += 0;
if (empty($participants[$participantid])) {
return false;
}
$user = $participants[$participantid];
return true;
}
/**
* Get the URL of a file that belongs to a response variable of this
* question_attempt.
* @param stored_file $file the file to link to.
* @return string the URL of that file.
*/
public function get_response_file_url(stored_file $file)
{
return file_encode_url(new moodle_url('/pluginfile.php'), '/' . implode('/', array($file->get_contextid(), $file->get_component(), $file->get_filearea(), $this->usageid, $this->slot, $file->get_itemid())) . $file->get_filepath() . $file->get_filename(), true);
}
/**
* Updates all files that are referencing this file with the new contenthash
* and filesize
*
* @param stored_file $storedfile
*/
public function update_references_to_storedfile(stored_file $storedfile)
{
global $CFG, $DB;
$params = array();
$params['contextid'] = $storedfile->get_contextid();
$params['component'] = $storedfile->get_component();
$params['filearea'] = $storedfile->get_filearea();
$params['itemid'] = $storedfile->get_itemid();
$params['filename'] = $storedfile->get_filename();
$params['filepath'] = $storedfile->get_filepath();
$reference = self::pack_reference($params);
$referencehash = sha1($reference);
$sql = "SELECT repositoryid, id FROM {files_reference}\n WHERE referencehash = ?";
$rs = $DB->get_recordset_sql($sql, array($referencehash));
$now = time();
foreach ($rs as $record) {
$this->update_references($record->id, $now, null, $storedfile->get_contenthash(), $storedfile->get_filesize(), 0, $storedfile->get_timemodified());
}
$rs->close();
}
/**
* Make url based on file for theme_snap components only.
*
* @param stored_file $file
* @return \moodle_url | bool
*/
private static function snap_pluginfile_url($file)
{
if (!$file) {
return false;
} else {
return \moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(), $file->get_filearea(), $file->get_timemodified(), $file->get_filepath(), $file->get_filename());
}
}
/**
* Print resource info and workaround link when JS not available.
* @param object $resource
* @param object $cm
* @param object $course
* @param stored_file $file main file
* @return does not return
*/
function resource_print_workaround($resource, $cm, $course, $file)
{
global $CFG, $OUTPUT;
resource_print_header($resource, $cm, $course);
resource_print_heading($resource, $cm, $course, true);
resource_print_intro($resource, $cm, $course, true);
$resource->mainfile = $file->get_filename();
echo '<div class="resourceworkaround">';
switch (resource_get_final_display_type($resource)) {
case RESOURCELIB_DISPLAY_POPUP:
$path = '/' . $file->get_contextid() . '/mod_resource/content/' . $resource->revision . $file->get_filepath() . $file->get_filename();
$fullurl = file_encode_url($CFG->wwwroot . '/pluginfile.php', $path, false);
$options = empty($resource->displayoptions) ? array() : unserialize($resource->displayoptions);
$width = empty($options['popupwidth']) ? 620 : $options['popupwidth'];
$height = empty($options['popupheight']) ? 450 : $options['popupheight'];
$wh = "width={$width},height={$height},toolbar=no,location=no,menubar=no,copyhistory=no,status=no,directories=no,scrollbars=yes,resizable=yes";
$extra = "onclick=\"window.open('{$fullurl}', '', '{$wh}'); return false;\"";
echo resource_get_clicktoopen($file, $resource->revision, $extra);
break;
case RESOURCELIB_DISPLAY_NEW:
$extra = 'onclick="this.target=\'_blank\'"';
echo resource_get_clicktoopen($file, $resource->revision, $extra);
break;
case RESOURCELIB_DISPLAY_DOWNLOAD:
echo resource_get_clicktodownload($file, $resource->revision);
break;
case RESOURCELIB_DISPLAY_OPEN:
default:
echo resource_get_clicktoopen($file, $resource->revision);
break;
}
echo '</div>';
echo $OUTPUT->footer();
die;
}
/**
* Resize the image, if required, then generate an img tag and, if required, a link to the full-size image
* @param stored_file $file the image file to process
* @param int $maxwidth the maximum width allowed for the image
* @param int $maxheight the maximum height allowed for the image
* @return string HTML fragment to add to the label
*/
function label_generate_resized_image(stored_file $file, $maxwidth, $maxheight)
{
global $CFG;
$fullurl = moodle_url::make_draftfile_url($file->get_itemid(), $file->get_filepath(), $file->get_filename());
$link = null;
$attrib = array('alt' => $file->get_filename(), 'src' => $fullurl);
if ($imginfo = $file->get_imageinfo()) {
// Work out the new width / height, bounded by maxwidth / maxheight
$width = $imginfo['width'];
$height = $imginfo['height'];
if (!empty($maxwidth) && $width > $maxwidth) {
$height *= (double) $maxwidth / $width;
$width = $maxwidth;
}
if (!empty($maxheight) && $height > $maxheight) {
$width *= (double) $maxheight / $height;
$height = $maxheight;
}
$attrib['width'] = $width;
$attrib['height'] = $height;
// If the size has changed and the image is of a suitable mime type, generate a smaller version
if ($width != $imginfo['width']) {
$mimetype = $file->get_mimetype();
if ($mimetype === 'image/gif' or $mimetype === 'image/jpeg' or $mimetype === 'image/png') {
require_once $CFG->libdir . '/gdlib.php';
$tmproot = make_temp_directory('mod_label');
$tmpfilepath = $tmproot . '/' . $file->get_contenthash();
$file->copy_content_to($tmpfilepath);
$data = generate_image_thumbnail($tmpfilepath, $width, $height);
unlink($tmpfilepath);
if (!empty($data)) {
$fs = get_file_storage();
$record = array('contextid' => $file->get_contextid(), 'component' => $file->get_component(), 'filearea' => $file->get_filearea(), 'itemid' => $file->get_itemid(), 'filepath' => '/', 'filename' => 's_' . $file->get_filename());
$smallfile = $fs->create_file_from_string($record, $data);
// Replace the image 'src' with the resized file and link to the original
$attrib['src'] = moodle_url::make_draftfile_url($smallfile->get_itemid(), $smallfile->get_filepath(), $smallfile->get_filename());
$link = $fullurl;
}
}
}
} else {
// Assume this is an image type that get_imageinfo cannot handle (e.g. SVG)
$attrib['width'] = $maxwidth;
}
$img = html_writer::empty_tag('img', $attrib);
if ($link) {
return html_writer::link($link, $img);
} else {
return $img;
}
}
/**
* Returns the number of aliases that link to the given stored_file
*
* Aliases in user draft areas are not counted.
*
* @param stored_file $storedfile
* @return int
*/
public function get_references_count_by_storedfile(stored_file $storedfile)
{
global $DB;
$params = array();
$params['contextid'] = $storedfile->get_contextid();
$params['component'] = $storedfile->get_component();
$params['filearea'] = $storedfile->get_filearea();
$params['itemid'] = $storedfile->get_itemid();
$params['filename'] = $storedfile->get_filename();
$params['filepath'] = $storedfile->get_filepath();
return $this->search_references_count(self::pack_reference($params));
}
/**
* Perform archiving file from stored file
*
* @param zip_archive $ziparch zip archive instance
* @param string $archivepath file path to archive
* @param stored_file $file stored_file object
*/
private function archive_stored($ziparch, $archivepath, $file)
{
$file->archive_file($ziparch, $archivepath);
if (!$file->is_directory()) {
return;
}
$baselength = strlen($file->get_filepath());
$fs = get_file_storage();
$files = $fs->get_directory_files($file->get_contextid(), $file->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), true, true);
foreach ($files as $file) {
$path = $file->get_filepath();
$path = substr($path, $baselength);
$path = $archivepath . '/' . $path;
if (!$file->is_directory()) {
$path = $path . $file->get_filename();
}
$file->archive_file($ziparch, $path);
}
}
/**
* Return the count files referring to provided stored_file instance
* This won't work for draft files
*
* @param stored_file $storedfile
* @return int
*/
public function get_references_count_by_storedfile($storedfile)
{
global $DB;
$params = array();
$params['contextid'] = $storedfile->get_contextid();
$params['component'] = $storedfile->get_component();
$params['filearea'] = $storedfile->get_filearea();
$params['itemid'] = $storedfile->get_itemid();
$params['filename'] = $storedfile->get_filename();
$params['filepath'] = $storedfile->get_filepath();
$params['userid'] = $storedfile->get_userid();
$reference = self::pack_reference($params);
$sql = "SELECT COUNT(f.id)\n FROM {files} f\n LEFT JOIN {files_reference} r\n ON f.referencefileid = r.id\n WHERE " . $DB->sql_compare_text('r.reference') . ' = ' . $DB->sql_compare_text('?') . "\n AND (f.component <> ? OR f.filearea <> ?)";
$count = $DB->count_records_sql($sql, array($reference, 'user', 'draft'));
return $count;
}
/**
* Updates all files that are referencing this file with the new contenthash
* and filesize
*
* @param stored_file $storedfile
*/
public function update_references_to_storedfile(stored_file $storedfile)
{
global $CFG, $DB;
$params = array();
$params['contextid'] = $storedfile->get_contextid();
$params['component'] = $storedfile->get_component();
$params['filearea'] = $storedfile->get_filearea();
$params['itemid'] = $storedfile->get_itemid();
$params['filename'] = $storedfile->get_filename();
$params['filepath'] = $storedfile->get_filepath();
$reference = self::pack_reference($params);
$referencehash = sha1($reference);
$sql = "SELECT repositoryid, id FROM {files_reference}\n WHERE referencehash = ? and reference = ?";
$rs = $DB->get_recordset_sql($sql, array($referencehash, $reference));
$now = time();
foreach ($rs as $record) {
require_once $CFG->dirroot . '/repository/lib.php';
$repo = repository::get_instance($record->repositoryid);
$lifetime = $repo->get_reference_file_lifetime($reference);
$this->update_references($record->id, $now, $lifetime, $storedfile->get_contenthash(), $storedfile->get_filesize(), 0);
}
$rs->close();
}
public static function create_from_archive(gallery $gallery, \stored_file $storedfile, $formdata = array())
{
global $DB;
$context = $gallery->get_collection()->context;
$maxitems = $gallery->get_collection()->maxitems;
$count = $DB->count_records('mediagallery_item', array('galleryid' => $gallery->id));
if ($maxitems != 0 && $count >= $maxitems) {
return;
}
$fs = get_file_storage();
$packer = get_file_packer('application/zip');
$fs->delete_area_files($context->id, 'mod_mediagallery', 'unpacktemp', 0);
$storedfile->extract_to_storage($packer, $context->id, 'mod_mediagallery', 'unpacktemp', 0, '/');
$itemfiles = $fs->get_area_files($context->id, 'mod_mediagallery', 'unpacktemp', 0);
$storedfile->delete();
foreach ($itemfiles as $storedfile) {
if ($storedfile->get_filesize() == 0 || preg_match('#^/.DS_Store|__MACOSX/#', $storedfile->get_filepath())) {
continue;
}
if ($maxitems != 0 && $count >= $maxitems) {
break;
}
$filename = $storedfile->get_filename();
// Create an item.
$data = new \stdClass();
$data->caption = $filename;
$data->description = '';
$data->display = 1;
$metafields = array('moralrights' => 1, 'originalauthor' => '', 'productiondate' => 0, 'medium' => '', 'publisher' => '', 'broadcaster' => '', 'reference' => '');
foreach ($metafields as $field => $default) {
$data->{$field} = isset($formdata->{$field}) ? $formdata->{$field} : $default;
}
$data->galleryid = $gallery->id;
if (!$count) {
$data->thumbnail = 1;
$count = 0;
}
$item = self::create($data);
// Copy the file into the correct area.
$fileinfo = array('contextid' => $context->id, 'component' => 'mod_mediagallery', 'filearea' => 'item', 'itemid' => $item->id, 'filepath' => '/', 'filename' => $filename);
if (!$fs->get_file($context->id, 'mod_mediagallery', 'item', $item->id, '/', $filename)) {
$storedfile = $fs->create_file_from_storedfile($fileinfo, $storedfile);
}
$item->generate_image_by_type('lowres');
$item->generate_image_by_type('thumbnail');
$count++;
}
$fs->delete_area_files($context->id, 'mod_mediagallery', 'unpacktemp', 0);
}
/**
* Based on a stored_file objects, adds either that file (if it's a file) or
* all its children (if it's a directory) into the list of files to
* archive.
*
* If a progress indicator is supplied and if this corresponds to a
* directory, then it will be repeatedly called with the same values. This
* allows the progress handler to respond in some way to avoid timeouts
* if required.
*
* @param array $expandedfiles List of all files to archive (output)
* @param string $archivepath Current path within archive
* @param stored_file $file File object
*/
protected function list_files_stored(array &$expandedfiles, $archivepath, stored_file $file)
{
if ($file->is_directory()) {
// Add a directory-creation record.
$expandedfiles[$archivepath . '/'] = null;
// Loop through directory contents (this is a recursive collection
// of all children not just one directory).
$fs = get_file_storage();
$baselength = strlen($file->get_filepath());
$files = $fs->get_directory_files($file->get_contextid(), $file->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), true, true);
foreach ($files as $childfile) {
// Get full pathname after original part.
$path = $childfile->get_filepath();
$path = substr($path, $baselength);
$path = $archivepath . '/' . $path;
if ($childfile->is_directory()) {
$childfile = null;
} else {
$path .= $childfile->get_filename();
}
$expandedfiles[$path] = $childfile;
}
} else {
// Just add it to list.
$expandedfiles[$archivepath] = $file;
}
}
/**
* Utility function for getting a file URL
*
* @param stored_file $file
* @return string file url
*/
private function util_get_file_url($file)
{
return moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $file->get_filename(), false);
}
static function ensure_pdf_compatible(stored_file $file)
{
global $CFG;
$fp = $file->get_content_file_handle();
$ident = fread($fp, 10);
if (substr_compare('%PDF-', $ident, 0, 5) !== 0) {
return false;
// This is not a PDF file at all
}
$ident = substr($ident, 5);
// Remove the '%PDF-' part
$ident = explode('\\x0A', $ident);
// Truncate to first '0a' character
list($major, $minor) = explode('.', $ident[0]);
// Split the major / minor version
$major = intval($major);
$minor = intval($minor);
if ($major == 0 || $minor == 0) {
return false;
// Not a valid PDF version number
}
if ($major = 1 && $minor <= 4) {
return true;
// We can handle this version - nothing else to do
}
$temparea = $CFG->dataroot . '/temp/uploadpdf';
$hash = $file->get_contenthash();
$tempsrc = $temparea . "/src-{$hash}.pdf";
$tempdst = $temparea . "/dst-{$hash}.pdf";
if (!file_exists($temparea)) {
if (!mkdir($temparea, 0777, true)) {
die("Unable to create temporary folder {$temparea}");
}
}
$file->copy_content_to($tempsrc);
// Copy the file
$gsexec = $CFG->gs_path;
$command = "{$gsexec} -q -sDEVICE=pdfwrite -dBATCH -dNOPAUSE -sOutputFile=\"{$tempdst}\" \"{$tempsrc}\" 2>&1";
$result = exec($command);
if (!file_exists($tempdst)) {
return false;
// Something has gone wrong in the conversion
}
$file->delete();
// Delete the original file
$fs = get_file_storage();
$fileinfo = array('contextid' => $file->get_contextid(), 'component' => $file->get_component(), 'filearea' => $file->get_filearea(), 'itemid' => $file->get_itemid(), 'filename' => $file->get_filename(), 'filepath' => $file->get_filepath());
$fs->create_file_from_pathname($fileinfo, $tempdst);
// Create replacement file
@unlink($tempsrc);
// Delete the temporary files
@unlink($tempdst);
return true;
}
/**
* Perform archiving file from stored file.
*
* @param zip_archive $ziparch zip archive instance
* @param string $archivepath file path to archive
* @param stored_file $file stored_file object
* @param file_progress $progress Progress indicator callback or null if not required
* @return bool success
*/
private function archive_stored($ziparch, $archivepath, $file, file_progress $progress = null)
{
$result = $file->archive_file($ziparch, $archivepath);
if (!$result) {
return false;
}
if (!$file->is_directory()) {
return true;
}
$baselength = strlen($file->get_filepath());
$fs = get_file_storage();
$files = $fs->get_directory_files($file->get_contextid(), $file->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), true, true);
foreach ($files as $file) {
// Record progress for each file.
if ($progress) {
$progress->progress();
}
$path = $file->get_filepath();
$path = substr($path, $baselength);
$path = $archivepath . '/' . $path;
if (!$file->is_directory()) {
$path = $path . $file->get_filename();
}
// Ignore result here, partial zipping is ok for now.
$file->archive_file($ziparch, $path);
}
return true;
}
/**
* xmldb_hotpot_move_file
*
* move a file or folder (within the same context)
* if $file is a directory, then all subfolders and files will also be moved
* if the destination file/folder already exists, then $file will be deleted
*
* @param stored_file $file
* @param string $new_filepath
* @param string $new_filename (optional, default='')
* @return void, but may update filearea
*/
function xmldb_hotpot_move_file($file, $new_filepath, $new_filename = '')
{
$fs = get_file_storage();
$contextid = $file->get_contextid();
$component = $file->get_component();
$filearea = $file->get_filearea();
$itemid = $file->get_itemid();
$old_filepath = $file->get_filepath();
$old_filename = $file->get_filename();
if ($file->is_directory()) {
$children = $fs->get_directory_files($contextid, $component, $filearea, $itemid, $old_filepath);
$old_filepath = '/^' . preg_quote($old_filepath, '/') . '/';
foreach ($children as $child) {
xmldb_hotpot_move_file($child, preg_replace($old_filepath, $new_filepath, $child->get_filepath(), 1));
}
}
if ($new_filename == '') {
$new_filename = $old_filename;
}
if ($fs->file_exists($contextid, $component, $filearea, $itemid, $new_filepath, $new_filename)) {
$file->delete();
// new file already exists
} else {
$file->rename($new_filepath, $new_filename);
}
}
/**
* Retreive the contents of a file. That file may either be in a conventional directory of the Moodle file storage
* @param file_storage $filestorage. should be null if using a conventional directory
* @param stored_file $fileobj the directory to look in. null if using a conventional directory
* @param string $dir the directory to look in. null if using the Moodle file storage
* @param string $filename the name of the file we want
* @return string the contents of the file
*/
public function data_preset_get_file_contents(&$filestorage, &$fileobj, $dir, $filename) {
if(empty($filestorage) || empty($fileobj)) {
if (substr($dir, -1)!='/') {
$dir .= '/';
}
return file_get_contents($dir.$filename);
} else {
$file = $filestorage->get_file(DATA_PRESET_CONTEXT, DATA_PRESET_COMPONENT, DATA_PRESET_FILEAREA, 0, $fileobj->get_filepath(), $filename);
return $file->get_content();
}
}
/**
* Get the image details from a file and return them.
* @param stored_file $file
* @param $pagecount
* @return mixed array|false
*/
protected static function get_image_details($file, $pagecount)
{
if ($imageinfo = $file->get_imageinfo()) {
$imgurl = moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(), $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $file->get_filename());
// Prevent browser from caching image if it has changed.
$imgurl->param('ts', $file->get_timemodified());
return array($imgurl, $imageinfo['width'], $imageinfo['height'], $pagecount);
}
// Something went wrong.
return false;
}
