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PhragmentFragment.php
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Mon, Dec 2, 10:15

PhragmentFragment.php
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<?php
final class PhragmentFragment extends PhragmentDAO
implements PhabricatorPolicyInterface {
protected $path;
protected $depth;
protected $latestVersionPHID;
protected $viewPolicy;
protected $editPolicy;
private $latestVersion = self::ATTACHABLE;
protected function getConfiguration() {
return array(
self::CONFIG_AUX_PHID => true,
self::CONFIG_COLUMN_SCHEMA => array(
'path' => 'text128',
'depth' => 'uint32',
'latestVersionPHID' => 'phid?',
),
self::CONFIG_KEY_SCHEMA => array(
'key_path' => array(
'columns' => array('path'),
'unique' => true,
),
),
) + parent::getConfiguration();
}
public function generatePHID() {
return PhabricatorPHID::generateNewPHID(
PhragmentFragmentPHIDType::TYPECONST);
}
public function getURI() {
return '/phragment/browse/'.$this->getPath();
}
public function getName() {
return basename($this->path);
}
public function getFile() {
return $this->assertAttached($this->file);
}
public function attachFile(PhabricatorFile $file) {
return $this->file = $file;
}
public function isDirectory() {
return $this->latestVersionPHID === null;
}
public function isDeleted() {
return $this->getLatestVersion()->getFilePHID() === null;
}
public function getLatestVersion() {
if ($this->latestVersionPHID === null) {
return null;
}
return $this->assertAttached($this->latestVersion);
}
public function attachLatestVersion(PhragmentFragmentVersion $version) {
return $this->latestVersion = $version;
}
/* -( Updating ) --------------------------------------------------------- */
/**
* Create a new fragment from a file.
*/
public static function createFromFile(
PhabricatorUser $viewer,
PhabricatorFile $file = null,
$path,
$view_policy,
$edit_policy) {
$fragment = id(new PhragmentFragment());
$fragment->setPath($path);
$fragment->setDepth(count(explode('/', $path)));
$fragment->setLatestVersionPHID(null);
$fragment->setViewPolicy($view_policy);
$fragment->setEditPolicy($edit_policy);
$fragment->save();
// Directory fragments have no versions associated with them, so we
// just return the fragment at this point.
if ($file === null) {
return $fragment;
}
if ($file->getMimeType() === 'application/zip') {
$fragment->updateFromZIP($viewer, $file);
} else {
$fragment->updateFromFile($viewer, $file);
}
return $fragment;
}
/**
* Set the specified file as the next version for the fragment.
*/
public function updateFromFile(
PhabricatorUser $viewer,
PhabricatorFile $file) {
$existing = id(new PhragmentFragmentVersionQuery())
->setViewer($viewer)
->withFragmentPHIDs(array($this->getPHID()))
->execute();
$sequence = count($existing);
$this->openTransaction();
$version = id(new PhragmentFragmentVersion());
$version->setSequence($sequence);
$version->setFragmentPHID($this->getPHID());
$version->setFilePHID($file->getPHID());
$version->save();
$this->setLatestVersionPHID($version->getPHID());
$this->save();
$this->saveTransaction();
$file->attachToObject($version->getPHID());
}
/**
* Apply the specified ZIP archive onto the fragment, removing
* and creating fragments as needed.
*/
public function updateFromZIP(
PhabricatorUser $viewer,
PhabricatorFile $file) {
if ($file->getMimeType() !== 'application/zip') {
throw new Exception("File must have mimetype 'application/zip'");
}
// First apply the ZIP as normal.
$this->updateFromFile($viewer, $file);
// Ensure we have ZIP support.
$zip = null;
try {
$zip = new ZipArchive();
} catch (Exception $e) {
// The server doesn't have php5-zip, so we can't do recursive updates.
return;
}
$temp = new TempFile();
Filesystem::writeFile($temp, $file->loadFileData());
if (!$zip->open($temp)) {
throw new Exception('Unable to open ZIP');
}
// Get all of the paths and their data from the ZIP.
$mappings = array();
for ($i = 0; $i < $zip->numFiles; $i++) {
$path = trim($zip->getNameIndex($i), '/');
$stream = $zip->getStream($path);
$data = null;
// If the stream is false, then it is a directory entry. We leave
// $data set to null for directories so we know not to create a
// version entry for them.
if ($stream !== false) {
$data = stream_get_contents($stream);
fclose($stream);
}
$mappings[$path] = $data;
}
// We need to detect any directories that are in the ZIP folder that
// aren't explicitly noted in the ZIP. This can happen if the file
// entries in the ZIP look like:
//
// * something/blah.png
// * something/other.png
// * test.png
//
// Where there is no explicit "something/" entry.
foreach ($mappings as $path_key => $data) {
if ($data === null) {
continue;
}
$directory = dirname($path_key);
while ($directory !== '.') {
if (!array_key_exists($directory, $mappings)) {
$mappings[$directory] = null;
}
if (dirname($directory) === $directory) {
// dirname() will not reduce this directory any further; to
// prevent infinite loop we just break out here.
break;
}
$directory = dirname($directory);
}
}
// Adjust the paths relative to this fragment so we can look existing
// fragments up in the DB.
$base_path = $this->getPath();
$paths = array();
foreach ($mappings as $p => $data) {
$paths[] = $base_path.'/'.$p;
}
// FIXME: What happens when a child exists, but the current user
// can't see it. We're going to create a new child with the exact
// same path and then bad things will happen.
$children = id(new PhragmentFragmentQuery())
->setViewer($viewer)
->needLatestVersion(true)
->withLeadingPath($this->getPath().'/')
->execute();
$children = mpull($children, null, 'getPath');
// Iterate over the existing fragments.
foreach ($children as $full_path => $child) {
$path = substr($full_path, strlen($base_path) + 1);
if (array_key_exists($path, $mappings)) {
if ($child->isDirectory() && $mappings[$path] === null) {
// Don't create a version entry for a directory
// (unless it's been converted into a file).
continue;
}
// The file is being updated.
$file = PhabricatorFile::newFromFileData(
$mappings[$path],
array('name' => basename($path)));
$child->updateFromFile($viewer, $file);
} else {
// The file is being deleted.
$child->deleteFile($viewer);
}
}
// Iterate over the mappings to find new files.
foreach ($mappings as $path => $data) {
if (!array_key_exists($base_path.'/'.$path, $children)) {
// The file is being created. If the data is null,
// then this is explicitly a directory being created.
$file = null;
if ($mappings[$path] !== null) {
$file = PhabricatorFile::newFromFileData(
$mappings[$path],
array('name' => basename($path)));
}
PhragmentFragment::createFromFile(
$viewer,
$file,
$base_path.'/'.$path,
$this->getViewPolicy(),
$this->getEditPolicy());
}
}
}
/**
* Delete the contents of the specified fragment.
*/
public function deleteFile(PhabricatorUser $viewer) {
$existing = id(new PhragmentFragmentVersionQuery())
->setViewer($viewer)
->withFragmentPHIDs(array($this->getPHID()))
->execute();
$sequence = count($existing);
$this->openTransaction();
$version = id(new PhragmentFragmentVersion());
$version->setSequence($sequence);
$version->setFragmentPHID($this->getPHID());
$version->setFilePHID(null);
$version->save();
$this->setLatestVersionPHID($version->getPHID());
$this->save();
$this->saveTransaction();
}
/* -( Utility ) ---------------------------------------------------------- */
public function getFragmentMappings(
PhabricatorUser $viewer,
$base_path) {
$children = id(new PhragmentFragmentQuery())
->setViewer($viewer)
->needLatestVersion(true)
->withLeadingPath($this->getPath().'/')
->withDepths(array($this->getDepth() + 1))
->execute();
if (count($children) === 0) {
$path = substr($this->getPath(), strlen($base_path) + 1);
return array($path => $this);
} else {
$mappings = array();
foreach ($children as $child) {
$child_mappings = $child->getFragmentMappings(
$viewer,
$base_path);
foreach ($child_mappings as $key => $value) {
$mappings[$key] = $value;
}
}
return $mappings;
}
}
/* -( Policy Interface )--------------------------------------------------- */
public function getCapabilities() {
return array(
PhabricatorPolicyCapability::CAN_VIEW,
PhabricatorPolicyCapability::CAN_EDIT,
);
}
public function getPolicy($capability) {
switch ($capability) {
case PhabricatorPolicyCapability::CAN_VIEW:
return $this->getViewPolicy();
case PhabricatorPolicyCapability::CAN_EDIT:
return $this->getEditPolicy();
}
}
public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
return false;
}
public function describeAutomaticCapability($capability) {
return null;
}
}

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