/**
* Performs synchronisation of an external file if the previous one has expired.
*
* This function must be implemented for external repositories supporting
* FILE_REFERENCE, it is called for existing aliases when their filesize,
* contenthash or timemodified are requested. It is not called for internal
* repositories (see {@link repository::has_moodle_files()}), references to
* internal files are updated immediately when source is modified.
*
* Referenced files may optionally keep their content in Moodle filepool (for
* thumbnail generation or to be able to serve cached copy). In this
* case both contenthash and filesize need to be synchronized. Otherwise repositories
* should use contenthash of empty file and correct filesize in bytes.
*
* Note that this function may be run for EACH file that needs to be synchronised at the
* moment. If anything is being downloaded or requested from external sources there
* should be a small timeout. The synchronisation is performed to update the size of
* the file and/or to update image and re-generated image preview. There is nothing
* fatal if syncronisation fails but it is fatal if syncronisation takes too long
* and hangs the script generating a page.
*
* Note: If you wish to call $file->get_filesize(), $file->get_contenthash() or
* $file->get_timemodified() make sure that recursion does not happen.
*
* Called from {@link stored_file::sync_external_file()}
*
* @uses stored_file::set_missingsource()
* @uses stored_file::set_synchronized()
* @param stored_file $file
* @return bool false when file does not need synchronisation, true if it was synchronised
*/
public function sync_reference(stored_file $file) {
if ($file->get_repository_id() != $this->id) {
// This should not really happen because the function can be called from stored_file only.
return false;
}
if ($this->has_moodle_files()) {
// References to local files need to be synchronised only once.
// Later they will be synchronised automatically when the source is changed.
if ($file->get_referencelastsync()) {
return false;
}
$fs = get_file_storage();
$params = file_storage::unpack_reference($file->get_reference(), true);
if (!is_array($params) || !($storedfile = $fs->get_file($params['contextid'],
$params['component'], $params['filearea'], $params['itemid'], $params['filepath'],
$params['filename']))) {
$file->set_missingsource();
} else {
$file->set_synchronized($storedfile->get_contenthash(), $storedfile->get_filesize());
}
return true;
}
// Backward compatibility (Moodle 2.3-2.5) implementation that calls
// methods repository::get_reference_file_lifetime(), repository::sync_individual_file()
// and repository::get_file_by_reference(). These methods are removed from the
// base repository class but may still be implemented by the child classes.
// THIS IS NOT A GOOD EXAMPLE of implementation. For good examples see the overwriting methods.
if (!method_exists($this, 'get_file_by_reference')) {
// Function get_file_by_reference() is not implemented. No synchronisation.
return false;
}
// Check if the previous sync result is still valid.
if (method_exists($this, 'get_reference_file_lifetime')) {
$lifetime = $this->get_reference_file_lifetime($file->get_reference());
} else {
// Default value that was hardcoded in Moodle 2.3 - 2.5.
$lifetime = 60 * 60 * 24;
}
if (($lastsynced = $file->get_referencelastsync()) && $lastsynced + $lifetime >= time()) {
return false;
}
$cache = cache::make('core', 'repositories');
if (($lastsyncresult = $cache->get('sync:'.$file->get_referencefileid())) !== false) {
if ($lastsyncresult === true) {
// We are in the process of synchronizing this reference.
// Avoid recursion when calling $file->get_filesize() and $file->get_contenthash().
return false;
} else {
// We have synchronised the same reference inside this request already.
// It looks like the object $file was created before the synchronisation and contains old data.
if (!empty($lastsyncresult['missing'])) {
$file->set_missingsource();
} else {
$cache->set('sync:'.$file->get_referencefileid(), true);
if ($file->get_contenthash() != $lastsyncresult['contenthash'] ||
$file->get_filesize() != $lastsyncresult['filesize']) {
$file->set_synchronized($lastsyncresult['contenthash'], $lastsyncresult['filesize']);
}
$cache->set('sync:'.$file->get_referencefileid(), $lastsyncresult);
}
return true;
}
}
// Weird function sync_individual_file() that was present in API in 2.3 - 2.5, default value was true.
if (method_exists($this, 'sync_individual_file') && !$this->sync_individual_file($file)) {
return false;
}
// Set 'true' into the cache to indicate that file is in the process of synchronisation.
$cache->set('sync:'.$file->get_referencefileid(), true);
// Create object with the structure that repository::get_file_by_reference() expects.
$reference = new stdClass();
$reference->id = $file->get_referencefileid();
$reference->reference = $file->get_reference();
$reference->referencehash = sha1($file->get_reference());
$reference->lastsync = $file->get_referencelastsync();
$reference->lifetime = $lifetime;
$fileinfo = $this->get_file_by_reference($reference);
$contenthash = null;
$filesize = null;
$fs = get_file_storage();
if (!empty($fileinfo->filesize)) {
// filesize returned
if (!empty($fileinfo->contenthash) && $fs->content_exists($fileinfo->contenthash)) {
// contenthash is specified and valid
$contenthash = $fileinfo->contenthash;
} else if ($fileinfo->filesize == $file->get_filesize()) {
// we don't know the new contenthash but the filesize did not change,
// assume the contenthash did not change either
$contenthash = $file->get_contenthash();
} else {
// we can't save empty contenthash so generate contenthash from empty string
list($contenthash, $unused1, $unused2) = $fs->add_string_to_pool('');
}
$filesize = $fileinfo->filesize;
} else if (!empty($fileinfo->filepath)) {
// File path returned
list($contenthash, $filesize, $newfile) = $fs->add_file_to_pool($fileinfo->filepath);
} else if (!empty($fileinfo->handle) && is_resource($fileinfo->handle)) {
// File handle returned
$contents = '';
while (!feof($fileinfo->handle)) {
$contents .= fread($fileinfo->handle, 8192);
}
fclose($fileinfo->handle);
list($contenthash, $filesize, $newfile) = $fs->add_string_to_pool($contents);
} else if (isset($fileinfo->content)) {
// File content returned
list($contenthash, $filesize, $newfile) = $fs->add_string_to_pool($fileinfo->content);
}
if (!isset($contenthash) or !isset($filesize)) {
$file->set_missingsource(null);
$cache->set('sync:'.$file->get_referencefileid(), array('missing' => true));
} else {
// update files table
$file->set_synchronized($contenthash, $filesize);
$cache->set('sync:'.$file->get_referencefileid(),
array('contenthash' => $contenthash, 'filesize' => $filesize));
}
return true;
}
/**
* Downloads the file from external repository and saves it in moodle filepool.
* This function is different from {@link repository::sync_reference()} because it has
* bigger request timeout and always downloads the content.
*
* This function is invoked when we try to unlink the file from the source and convert
* a reference into a true copy.
*
* @throws exception when file could not be imported
*
* @param stored_file $file
* @param int $maxbytes throw an exception if file size is bigger than $maxbytes (0 means no limit)
*/
public function import_external_file_contents(stored_file $file, $maxbytes = 0)
{
if (!$file->is_external_file()) {
// nothing to import if the file is not a reference
return;
} else {
if ($file->get_repository_id() != $this->id) {
// error
debugging('Repository instance id does not match');
return;
} else {
if ($this->has_moodle_files()) {
// files that are references to local files are already in moodle filepool
// just validate the size
if ($maxbytes > 0 && $file->get_filesize() > $maxbytes) {
throw new file_exception('maxbytes');
}
return;
} else {
if ($maxbytes > 0 && $file->get_filesize() > $maxbytes) {
// note that stored_file::get_filesize() also calls synchronisation
throw new file_exception('maxbytes');
}
$fs = get_file_storage();
$contentexists = $fs->content_exists($file->get_contenthash());
if ($contentexists && $file->get_filesize() && $file->get_contenthash() === sha1('')) {
// even when 'file_storage::content_exists()' returns true this may be an empty
// content for the file that was not actually downloaded
$contentexists = false;
}
if (!$file->get_status() && $contentexists) {
// we already have the content in moodle filepool and it was synchronised recently.
// Repositories may overwrite it if they want to force synchronisation anyway!
return;
} else {
// attempt to get a file
try {
$fileinfo = $this->get_file($file->get_reference());
if (isset($fileinfo['path'])) {
list($contenthash, $filesize, $newfile) = $fs->add_file_to_pool($fileinfo['path']);
// set this file and other similar aliases synchronised
$file->set_synchronized($contenthash, $filesize);
} else {
throw new moodle_exception('errorwhiledownload', 'repository', '', '');
}
} catch (Exception $e) {
if ($contentexists) {
// better something than nothing. We have a copy of file. It's sync time
// has expired but it is still very likely that it is the last version
} else {
throw $e;
}
}
}
}
}
}
}
/**
* Replace the content by providing another stored_file instance
*
* @param stored_file $storedfile
*/
public function replace_content_with(stored_file $storedfile)
{
$contenthash = $storedfile->get_contenthash();
$this->set_contenthash($contenthash);
}
/**
* 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();
}
/**
* Replaces the fields that might have changed when file was overriden in filepicker:
* reference, contenthash, filesize, userid
*
* Note that field 'source' must be updated separately because
* it has different format for draft and non-draft areas and
* this function will usually be used to replace non-draft area
* file with draft area file.
*
* @param stored_file $newfile
* @throws coding_exception
*/
public function replace_file_with(stored_file $newfile)
{
if ($newfile->get_referencefileid() && $this->fs->get_references_count_by_storedfile($this)) {
// The new file is a reference.
// The current file has other local files referencing to it.
// Double reference is not allowed.
throw new moodle_exception('errordoublereference', 'repository');
}
$filerecord = new stdClass();
$contenthash = $newfile->get_contenthash();
if ($this->fs->content_exists($contenthash)) {
$filerecord->contenthash = $contenthash;
} else {
throw new file_exception('storedfileproblem', 'Invalid contenthash, content must be already in filepool', $contenthash);
}
$filerecord->filesize = $newfile->get_filesize();
$filerecord->referencefileid = $newfile->get_referencefileid();
$filerecord->userid = $newfile->get_userid();
$this->update($filerecord);
}
/**
* 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;
}
}
/**
* Export the data for the given file in relation to this document.
*
* @param \stored_file $file The stored file we are talking about.
* @return array
*/
public function export_file_for_engine($file)
{
$data = $this->export_for_engine();
// Content is index in the main document.
unset($data['content']);
unset($data['description1']);
unset($data['description2']);
// Going to append the fileid to give it a unique id.
$data['id'] = $data['id'] . '-solrfile' . $file->get_id();
$data['type'] = \core_search\manager::TYPE_FILE;
$data['solr_fileid'] = $file->get_id();
$data['solr_filecontenthash'] = $file->get_contenthash();
$data['solr_fileindexstatus'] = self::INDEXED_FILE_TRUE;
$data['title'] = $file->get_filename();
$data['modified'] = self::format_time_for_engine($file->get_timemodified());
return $data;
}
/**
* Copies a file from somewhere else in moodle
* to the portfolio temporary working directory
* associated with this export
*
* @param stored_file $oldfile existing stored file object
* @return stored_file|bool new file object
*/
public function copy_existing_file($oldfile)
{
if (array_key_exists($oldfile->get_contenthash(), $this->newfilehashes)) {
return $this->newfilehashes[$oldfile->get_contenthash()];
}
$fs = get_file_storage();
$file_record = $this->new_file_record_base($oldfile->get_filename());
if ($dir = $this->get('format')->get_file_directory()) {
$file_record->filepath = '/' . $dir . '/';
}
try {
$newfile = $fs->create_file_from_storedfile($file_record, $oldfile->get_id());
$this->newfilehashes[$newfile->get_contenthash()] = $newfile;
return $newfile;
} catch (file_exception $e) {
return false;
}
}
public function sync_reference(stored_file $file)
{
if ($file->get_referencelastsync() + 60 > time()) {
// Does not cost us much to synchronise within our own filesystem, check every 1 minute.
return false;
}
static $issyncing = false;
if ($issyncing) {
// Avoid infinite recursion when calling $file->get_filesize() and get_contenthash().
return false;
}
$filepath = $this->get_rootpath() . ltrim($file->get_reference(), '/');
if ($this->is_in_repository($file->get_reference()) && file_exists($filepath) && is_readable($filepath)) {
$fs = get_file_storage();
$issyncing = true;
if (file_extension_in_typegroup($filepath, 'web_image')) {
$contenthash = sha1_file($filepath);
if ($file->get_contenthash() == $contenthash) {
// File did not change since the last synchronisation.
$filesize = filesize($filepath);
} else {
// Copy file into moodle filepool (used to generate an image thumbnail).
list($contenthash, $filesize, $newfile) = $fs->add_file_to_pool($filepath);
}
} else {
// Update only file size so file will NOT be copied into moodle filepool.
$emptyfile = $contenthash = sha1('');
$currentcontenthash = $file->get_contenthash();
if ($currentcontenthash !== $emptyfile && $currentcontenthash === sha1_file($filepath)) {
// File content was synchronised and has not changed since then, leave it.
$contenthash = null;
}
$filesize = filesize($filepath);
}
$issyncing = false;
$file->set_synchronized($contenthash, $filesize);
} else {
$file->set_missingsource();
}
return true;
}
/**
* Tries to recover missing content of file from trash.
*
* @param stored_file $file stored_file instance
* @return bool success
*/
public function try_content_recovery($file)
{
$contenthash = $file->get_contenthash();
$trashfile = $this->trash_path_from_hash($contenthash) . '/' . $contenthash;
if (!is_readable($trashfile)) {
if (!is_readable($this->trashdir . '/' . $contenthash)) {
return false;
}
// nice, at least alternative trash file in trash root exists
$trashfile = $this->trashdir . '/' . $contenthash;
}
if (filesize($trashfile) != $file->get_filesize() or sha1_file($trashfile) != $contenthash) {
//weird, better fail early
return false;
}
$contentdir = $this->path_from_hash($contenthash);
$contentfile = $contentdir . '/' . $contenthash;
if (file_exists($contentfile)) {
//strange, no need to recover anything
return true;
}
if (!is_dir($contentdir)) {
if (!mkdir($contentdir, $this->dirpermissions, true)) {
return false;
}
}
return rename($trashfile, $contentfile);
}
/**
* Check to see if PDF is version 1.4 (or below); if not: use ghostscript to convert it
* @param stored_file $file
* @return string path to copy or converted pdf (false == fail)
*/
public 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.
}
$temparea = \make_temp_directory('assignfeedback_editpdf');
$hash = $file->get_contenthash();
// Use the contenthash to make sure the temp files have unique names.
$tempsrc = $temparea . "/src-{$hash}.pdf";
$tempdst = $temparea . "/dst-{$hash}.pdf";
if ($major = 1 && $minor <= 4) {
// PDF is valid version - just create a copy we can use.
$file->copy_content_to($tempdst);
// Copy the file.
return $tempdst;
}
$file->copy_content_to($tempsrc);
// Copy the file.
$gsexec = \get_config('assignfeedback_editpdf', 'gspath');
$command = "{$gsexec} -q -sDEVICE=pdfwrite -dBATCH -dNOPAUSE -sOutputFile=\"{$tempdst}\" \"{$tempsrc}\"";
//$command = escapeshellcmd($command);
exec($command);
@unlink($tempsrc);
if (!file_exists($tempdst)) {
// Something has gone wrong in the conversion.
return false;
}
return $tempdst;
}
/**
* Does this file exist in any of the current files supported by this plugin for this user?
*
* @param assign $assignment - The assignment instance
* @param stdClass $user The user matching this uploaded file
* @param assign_plugin $plugin The matching plugin from the filename
* @param string $filename The parsed filename from the zip
* @param stored_file $fileinfo The info about the extracted file from the zip
* @return bool - True if the file has been modified or is new
*/
public function is_file_modified($assignment, $user, $plugin, $filename, $fileinfo) {
$sg = null;
if ($plugin->get_subtype() == 'assignsubmission') {
$sg = $assignment->get_user_submission($user->id, false);
} else if ($plugin->get_subtype() == 'assignfeedback') {
$sg = $assignment->get_user_grade($user->id, false);
} else {
return false;
}
if (!$sg) {
return true;
}
foreach ($plugin->get_files($sg, $user) as $pluginfilename => $file) {
if ($pluginfilename == $filename) {
// Extract the file and compare hashes.
$contenthash = '';
if (is_array($file)) {
$content = reset($file);
$contenthash = sha1($content);
} else {
$contenthash = $file->get_contenthash();
}
if ($contenthash != $fileinfo->get_contenthash()) {
return true;
} else {
return false;
}
}
}
return 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 = ? 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();
}
/**
* Check to see if PDF is version 1.4 (or below); if not: use ghostscript to convert it
* @param stored_file $file
* @return string path to copy or converted pdf (false == fail)
*/
public static function ensure_pdf_compatible(\stored_file $file)
{
global $CFG;
$temparea = \make_temp_directory('assignfeedback_editpdf');
$hash = $file->get_contenthash();
// Use the contenthash to make sure the temp files have unique names.
$tempsrc = $temparea . "/src-{$hash}.pdf";
$tempdst = $temparea . "/dst-{$hash}.pdf";
$file->copy_content_to($tempsrc);
// Copy the file.
$pdf = new pdf();
$pagecount = 0;
try {
$pagecount = $pdf->load_pdf($tempsrc);
} catch (\Exception $e) {
// PDF was not valid - try running it through ghostscript to clean it up.
$pagecount = 0;
}
$pdf->Close();
// PDF loaded and never saved/outputted needs to be closed.
if ($pagecount > 0) {
// Page is valid and can be read by tcpdf.
return $tempsrc;
}
$gsexec = \escapeshellarg($CFG->pathtogs);
$tempdstarg = \escapeshellarg($tempdst);
$tempsrcarg = \escapeshellarg($tempsrc);
$command = "{$gsexec} -q -sDEVICE=pdfwrite -dBATCH -dNOPAUSE -sOutputFile={$tempdstarg} {$tempsrcarg}";
exec($command);
@unlink($tempsrc);
if (!file_exists($tempdst)) {
// Something has gone wrong in the conversion.
return false;
}
$pdf = new pdf();
$pagecount = 0;
try {
$pagecount = $pdf->load_pdf($tempdst);
} catch (\Exception $e) {
// PDF was not valid - try running it through ghostscript to clean it up.
$pagecount = 0;
}
$pdf->Close();
// PDF loaded and never saved/outputted needs to be closed.
if ($pagecount <= 0) {
@unlink($tempdst);
// Could not parse the converted pdf.
return false;
}
return $tempdst;
}
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;
}
