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DifferentialModernHunk.php
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Created
Thu, Jan 16, 10:56

DifferentialModernHunk.php
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<?php
final class DifferentialModernHunk extends DifferentialHunk {
const DATATYPE_TEXT = 'text';
const DATATYPE_FILE = 'file';
const DATAFORMAT_RAW = 'byte';
const DATAFORMAT_DEFLATED = 'gzde';
protected $dataType;
protected $dataEncoding;
protected $dataFormat;
protected $data;
private $rawData;
private $forcedEncoding;
private $fileData;
public function getTableName() {
return 'differential_hunk_modern';
}
protected function getConfiguration() {
return array(
self::CONFIG_BINARY => array(
'data' => true,
),
self::CONFIG_COLUMN_SCHEMA => array(
'dataType' => 'bytes4',
'dataEncoding' => 'text16?',
'dataFormat' => 'bytes4',
'oldOffset' => 'uint32',
'oldLen' => 'uint32',
'newOffset' => 'uint32',
'newLen' => 'uint32',
),
self::CONFIG_KEY_SCHEMA => array(
'key_changeset' => array(
'columns' => array('changesetID'),
),
'key_created' => array(
'columns' => array('dateCreated'),
),
),
) + parent::getConfiguration();
}
public function setChanges($text) {
$this->rawData = $text;
$this->dataEncoding = $this->detectEncodingForStorage($text);
$this->dataType = self::DATATYPE_TEXT;
$this->dataFormat = self::DATAFORMAT_RAW;
$this->data = $text;
return $this;
}
public function getChanges() {
return $this->getUTF8StringFromStorage(
$this->getRawData(),
nonempty($this->forcedEncoding, $this->getDataEncoding()));
}
public function forceEncoding($encoding) {
$this->forcedEncoding = $encoding;
return $this;
}
public function save() {
$type = $this->getDataType();
$format = $this->getDataFormat();
// Before saving the data, attempt to compress it.
if ($type == self::DATATYPE_TEXT) {
if ($format == self::DATAFORMAT_RAW) {
$data = $this->getData();
$deflated = PhabricatorCaches::maybeDeflateData($data);
if ($deflated !== null) {
$this->data = $deflated;
$this->dataFormat = self::DATAFORMAT_DEFLATED;
}
}
}
return parent::save();
}
public function saveAsText() {
$old_type = $this->getDataType();
$old_data = $this->getData();
if ($old_type == self::DATATYPE_TEXT) {
return $this;
}
$raw_data = $this->getRawData();
$this->setDataType(self::DATATYPE_TEXT);
$this->setData($raw_data);
$result = $this->save();
$this->destroyData($old_type, $old_data);
return $result;
}
public function saveAsFile() {
$old_type = $this->getDataType();
$old_data = $this->getData();
if ($old_type == self::DATATYPE_FILE) {
return $this;
}
$raw_data = $this->getRawData();
$file = PhabricatorFile::newFromFileData(
$raw_data,
array(
'name' => 'differential-hunk',
'mime-type' => 'application/octet-stream',
'viewPolicy' => PhabricatorPolicies::POLICY_NOONE,
));
$this->setDataType(self::DATATYPE_FILE);
$this->setData($file->getPHID());
// NOTE: Because hunks don't have a PHID and we just load hunk data with
// the ominipotent viewer, we do not need to attach the file to anything.
$result = $this->save();
$this->destroyData($old_type, $old_data);
return $result;
}
private function getRawData() {
if ($this->rawData === null) {
$type = $this->getDataType();
$data = $this->getData();
switch ($type) {
case self::DATATYPE_TEXT:
// In this storage type, the changes are stored on the object.
$data = $data;
break;
case self::DATATYPE_FILE:
$data = $this->loadFileData();
break;
default:
throw new Exception(
pht('Hunk has unsupported data type "%s"!', $type));
}
$format = $this->getDataFormat();
switch ($format) {
case self::DATAFORMAT_RAW:
// In this format, the changes are stored as-is.
$data = $data;
break;
case self::DATAFORMAT_DEFLATED:
$data = PhabricatorCaches::inflateData($data);
break;
default:
throw new Exception(
pht('Hunk has unsupported data encoding "%s"!', $type));
}
$this->rawData = $data;
}
return $this->rawData;
}
private function loadFileData() {
if ($this->fileData === null) {
$type = $this->getDataType();
if ($type !== self::DATATYPE_FILE) {
throw new Exception(
pht(
'Unable to load file data for hunk with wrong data type ("%s").',
$type));
}
$file_phid = $this->getData();
$file = $this->loadRawFile($file_phid);
$data = $file->loadFileData();
$this->fileData = $data;
}
return $this->fileData;
}
private function loadRawFile($file_phid) {
$viewer = PhabricatorUser::getOmnipotentUser();
$files = id(new PhabricatorFileQuery())
->setViewer($viewer)
->withPHIDs(array($file_phid))
->execute();
if (!$files) {
throw new Exception(
pht(
'Failed to load file ("%s") with hunk data.',
$file_phid));
}
$file = head($files);
return $file;
}
public function destroyObjectPermanently(
PhabricatorDestructionEngine $engine) {
$type = $this->getDataType();
$data = $this->getData();
$this->destroyData($type, $data, $engine);
return parent::destroyObjectPermanently($engine);
}
private function destroyData(
$type,
$data,
PhabricatorDestructionEngine $engine = null) {
if (!$engine) {
$engine = new PhabricatorDestructionEngine();
}
switch ($type) {
case self::DATATYPE_FILE:
$file = $this->loadRawFile($data);
$engine->destroyObject($file);
break;
}
}
}

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