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phorge/src/infrastructure/diff/viewstate/PhabricatorChangesetViewStateEngine.php
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PhabricatorChangesetViewStateEngine.php
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<?php
final class PhabricatorChangesetViewStateEngine
extends Phobject {
private $viewer;
private $objectPHID;
private $changeset;
private $storage;
public function setViewer(PhabricatorUser $viewer) {
$this->viewer = $viewer;
return $this;
}
public function getViewer() {
return $this->viewer;
}
public function setObjectPHID($object_phid) {
$this->objectPHID = $object_phid;
return $this;
}
public function getObjectPHID() {
return $this->objectPHID;
}
public function setChangeset(DifferentialChangeset $changeset) {
$this->changeset = $changeset;
return $this;
}
public function getChangeset() {
return $this->changeset;
}
public function newViewStateFromRequest(AphrontRequest $request) {
$storage = $this->loadViewStateStorage();
$this->setStorage($storage);
$highlight = $request->getStr('highlight');
if ($highlight !== null) {
$this->setChangesetProperty('highlight', $highlight);
}
$encoding = $request->getStr('encoding');
if ($encoding !== null) {
$this->setChangesetProperty('encoding', $encoding);
}
$engine = $request->getStr('engine');
if ($engine !== null) {
$this->setChangesetProperty('engine', $engine);
}
$renderer = $request->getStr('renderer');
if ($renderer !== null) {
$this->setChangesetProperty('renderer', $renderer);
}
$hidden = $request->getStr('hidden');
if ($hidden !== null) {
$this->setChangesetProperty('hidden', (int)$hidden);
}
$this->saveViewStateStorage();
$state = new PhabricatorChangesetViewState();
$highlight_language = $this->getChangesetProperty('highlight');
$state->setHighlightLanguage($highlight_language);
$encoding = $this->getChangesetProperty('encoding');
$state->setCharacterEncoding($encoding);
$document_engine = $this->getChangesetProperty('engine');
$state->setDocumentEngineKey($document_engine);
$renderer = $this->getChangesetProperty('renderer');
$state->setRendererKey($renderer);
$this->updateHiddenState($state);
// This is the client-selected default renderer based on viewport
// dimensions.
$device_key = $request->getStr('device');
if ($device_key !== null) {
$state->setDefaultDeviceRendererKey($device_key);
}
$discard_response = $request->getStr('discard');
if ($discard_response !== null) {
$state->setDiscardResponse(true);
}
return $state;
}
private function setStorage(DifferentialViewState $storage) {
$this->storage = $storage;
return $this;
}
private function getStorage() {
return $this->storage;
}
private function setChangesetProperty(
$key,
$value) {
$storage = $this->getStorage();
$changeset = $this->getChangeset();
$storage->setChangesetProperty($changeset, $key, $value);
}
private function getChangesetProperty(
$key,
$default = null) {
$storage = $this->getStorage();
$changeset = $this->getChangeset();
return $storage->getChangesetProperty($changeset, $key, $default);
}
private function loadViewStateStorage() {
$viewer = $this->getViewer();
$object_phid = $this->getObjectPHID();
$viewer_phid = $viewer->getPHID();
$storage = null;
if ($viewer_phid !== null) {
$storage = id(new DifferentialViewStateQuery())
->setViewer($viewer)
->withViewerPHIDs(array($viewer_phid))
->withObjectPHIDs(array($object_phid))
->executeOne();
}
if ($storage === null) {
$storage = id(new DifferentialViewState())
->setObjectPHID($object_phid);
if ($viewer_phid !== null) {
$storage->setViewerPHID($viewer_phid);
} else {
$storage->makeEphemeral();
}
}
return $storage;
}
private function saveViewStateStorage() {
if (PhabricatorEnv::isReadOnly()) {
return;
}
$storage = $this->getStorage();
$viewer_phid = $storage->getViewerPHID();
if ($viewer_phid === null) {
return;
}
if (!$storage->getHasModifications()) {
return;
}
$unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
try {
$storage->save();
} catch (AphrontDuplicateKeyQueryException $ex) {
// We may race another process to save view state. For now, just discard
// our state if we do.
}
unset($unguarded);
}
private function updateHiddenState(PhabricatorChangesetViewState $state) {
$is_hidden = false;
$was_modified = false;
$storage = $this->getStorage();
$changeset = $this->getChangeset();
$entries = $storage->getChangesetPropertyEntries($changeset, 'hidden');
$entries = isort($entries, 'epoch');
if ($entries) {
$other_key = last_key($entries);
$other_spec = last($entries);
$this_version = (int)$changeset->getDiffID();
$other_version = (int)idx($other_spec, 'diffID');
$other_value = (bool)idx($other_spec, 'value', false);
if ($other_value === false) {
$is_hidden = false;
} else if ($other_version >= $this_version) {
$is_hidden = $other_value;
} else {
$viewer = $this->getViewer();
$other_changeset = id(new DifferentialChangesetQuery())
->setViewer($viewer)
->withIDs(array($other_key))
->executeOne();
$is_modified = false;
if ($other_changeset) {
if (!$changeset->hasSameEffectAs($other_changeset)) {
$is_modified = true;
}
}
$is_hidden = false;
$was_modified = true;
}
}
$state->setHidden($is_hidden);
$state->setModifiedSinceHide($was_modified);
}
}

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