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PhragmentPatchController.php
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Mon, Jul 15, 15:45

PhragmentPatchController.php
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<?php
final class PhragmentPatchController extends PhragmentController {
public function shouldAllowPublic() {
return true;
}
public function handleRequest(AphrontRequest $request) {
$viewer = $request->getViewer();
$aid = $request->getURIData('aid');
$bid = $request->getURIData('bid');
// If "aid" is "x", then it means the user wants to generate
// a patch of an empty file to the version specified by "bid".
$ids = array($aid, $bid);
if ($aid === 'x') {
$ids = array($bid);
}
$versions = id(new PhragmentFragmentVersionQuery())
->setViewer($viewer)
->withIDs($ids)
->execute();
$version_a = null;
if ($aid !== 'x') {
$version_a = idx($versions, $aid, null);
if ($version_a === null) {
return new Aphront404Response();
}
}
$version_b = idx($versions, $bid, null);
if ($version_b === null) {
return new Aphront404Response();
}
$file_phids = array();
if ($version_a !== null) {
$file_phids[] = $version_a->getFilePHID();
}
$file_phids[] = $version_b->getFilePHID();
$files = id(new PhabricatorFileQuery())
->setViewer($viewer)
->withPHIDs($file_phids)
->execute();
$files = mpull($files, null, 'getPHID');
$file_a = null;
if ($version_a != null) {
$file_a = idx($files, $version_a->getFilePHID(), null);
}
$file_b = idx($files, $version_b->getFilePHID(), null);
$patch = PhragmentPatchUtil::calculatePatch($file_a, $file_b);
if ($patch === null) {
// There are no differences between the two files, so we output
// an empty patch.
$patch = '';
}
$a_sequence = 'x';
if ($version_a !== null) {
$a_sequence = $version_a->getSequence();
}
$name =
$version_b->getFragment()->getName().'.'.
$a_sequence.'.'.
$version_b->getSequence().'.patch';
$return = $version_b->getURI();
if ($request->getExists('return')) {
$return = $request->getStr('return');
}
$result = PhabricatorFile::buildFromFileDataOrHash(
$patch,
array(
'name' => $name,
'mime-type' => 'text/plain',
'ttl' => time() + 60 * 60 * 24,
));
$unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
$result->attachToObject($version_b->getFragmentPHID());
unset($unguarded);
return id(new AphrontRedirectResponse())
->setURI($result->getDownloadURI($return));
}
}

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