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PhragmentZIPController.php
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Sat, Jan 11, 03:38

PhragmentZIPController.php
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<?php
final class PhragmentZIPController extends PhragmentController {
private $dblob;
private $snapshot;
private $snapshotCache;
public function shouldAllowPublic() {
return true;
}
public function willProcessRequest(array $data) {
$this->dblob = idx($data, 'dblob', '');
$this->snapshot = idx($data, 'snapshot', null);
}
public function processRequest() {
$request = $this->getRequest();
$viewer = $request->getUser();
$parents = $this->loadParentFragments($this->dblob);
if ($parents === null) {
return new Aphront404Response();
}
$fragment = idx($parents, count($parents) - 1, null);
if ($this->snapshot !== null) {
$snapshot = id(new PhragmentSnapshotQuery())
->setViewer($viewer)
->withPrimaryFragmentPHIDs(array($fragment->getPHID()))
->withNames(array($this->snapshot))
->executeOne();
if ($snapshot === null) {
return new Aphront404Response();
}
$cache = id(new PhragmentSnapshotChildQuery())
->setViewer($viewer)
->needFragmentVersions(true)
->withSnapshotPHIDs(array($snapshot->getPHID()))
->execute();
$this->snapshotCache = mpull(
$cache,
'getFragmentVersion',
'getFragmentPHID');
}
$temp = new TempFile();
$zip = null;
try {
$zip = new ZipArchive();
} catch (Exception $e) {
$dialog = new AphrontDialogView();
$dialog->setUser($viewer);
$inst = pht(
'This system does not have the ZIP PHP extension installed. This '.
'is required to download ZIPs from Phragment.');
$dialog->setTitle(pht('ZIP Extension Not Installed'));
$dialog->appendParagraph($inst);
$dialog->addCancelButton('/phragment/browse/'.$this->dblob);
return id(new AphrontDialogResponse())->setDialog($dialog);
}
if (!$zip->open((string)$temp, ZipArchive::CREATE)) {
throw new Exception('Unable to create ZIP archive!');
}
$mappings = $this->getFragmentMappings($fragment, $fragment->getPath());
$phids = array();
foreach ($mappings as $path => $file_phid) {
$phids[] = $file_phid;
}
$files = id(new PhabricatorFileQuery())
->setViewer($viewer)
->withPHIDs($phids)
->execute();
$files = mpull($files, null, 'getPHID');
foreach ($mappings as $path => $file_phid) {
if (!isset($files[$file_phid])) {
// The path is most likely pointing to a deleted fragment, which
// hence no longer has a file associated with it.
unset($mappings[$path]);
continue;
}
$mappings[$path] = $files[$file_phid];
}
foreach ($mappings as $path => $file) {
if ($file !== null) {
$zip->addFromString($path, $file->loadFileData());
}
}
$zip->close();
$zip_name = $fragment->getName();
if (substr($zip_name, -4) !== '.zip') {
$zip_name .= '.zip';
}
$data = Filesystem::readFile((string)$temp);
$file = PhabricatorFile::buildFromFileDataOrHash(
$data,
array(
'name' => $zip_name,
'ttl' => time() + 60 * 60 * 24,
));
$unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
$file->attachToObject($viewer, $fragment->getPHID());
unset($unguarded);
$return = $fragment->getURI();
if ($request->getExists('return')) {
$return = $request->getStr('return');
}
return id(new AphrontRedirectResponse())
->setURI($file->getDownloadURI($return));
}
/**
* Returns a list of mappings like array('some/path.txt' => 'file PHID');
*/
private function getFragmentMappings(PhragmentFragment $current, $base_path) {
$mappings = $current->getFragmentMappings(
$this->getRequest()->getUser(),
$base_path);
$result = array();
foreach ($mappings as $path => $fragment) {
$version = $this->getVersion($fragment);
if ($version !== null) {
$result[$path] = $version->getFilePHID();
}
}
return $result;
}
private function getVersion($fragment) {
if ($this->snapshot === null) {
return $fragment->getLatestVersion();
} else {
return idx($this->snapshotCache, $fragment->getPHID(), null);
}
}
}

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