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	diff --git a/src/applications/diffusion/query/DiffusionCommitQuery.php b/src/applications/diffusion/query/DiffusionCommitQuery.php
	index 18b2dbacde..ad6788be61 100644
	--- a/src/applications/diffusion/query/DiffusionCommitQuery.php
	+++ b/src/applications/diffusion/query/DiffusionCommitQuery.php
	@@ -1,995 +1,996 @@
	<?php

	final class DiffusionCommitQuery
	extends PhabricatorCursorPagedPolicyAwareQuery {

	private $ids;
	private $phids;
	private $authorPHIDs;
	private $defaultRepository;
	private $identifiers;
	private $repositoryIDs;
	private $repositoryPHIDs;
	private $identifierMap;
	private $responsiblePHIDs;
	private $statuses;
	private $packagePHIDs;
	private $unreachable;
	private $permanent;

	private $needAuditRequests;
	private $needAuditAuthority;
	private $auditIDs;
	private $auditorPHIDs;
	private $epochMin;
	private $epochMax;
	private $importing;
	private $ancestorsOf;

	private $needCommitData;
	private $needDrafts;
	private $needIdentities;

	private $mustFilterRefs = false;
	private $refRepository;

	public function withIDs(array $ids) {
	$this->ids = $ids;
	return $this;
	}

	public function withPHIDs(array $phids) {
	$this->phids = $phids;
	return $this;
	}

	public function withAuthorPHIDs(array $phids) {
	$this->authorPHIDs = $phids;
	return $this;
	}

	/**
	* Load commits by partial or full identifiers, e.g. "rXab82393", "rX1234",
	* or "a9caf12". When an identifier matches multiple commits, they will all
	* be returned; callers should be prepared to deal with more results than
	* they queried for.
	*/
	public function withIdentifiers(array $identifiers) {
	// Some workflows (like blame lookups) can pass in large numbers of
	// duplicate identifiers. We only care about unique identifiers, so
	// get rid of duplicates immediately.
	$identifiers = array_fuse($identifiers);

	$this->identifiers = $identifiers;
	return $this;
	}

	/**
	* Look up commits in a specific repository. This is a shorthand for calling
	* @{method:withDefaultRepository} and @{method:withRepositoryIDs}.
	*/
	public function withRepository(PhabricatorRepository $repository) {
	$this->withDefaultRepository($repository);
	$this->withRepositoryIDs(array($repository->getID()));
	return $this;
	}

	/**
	* Look up commits in a specific repository. Prefer
	* @{method:withRepositoryIDs}; the underlying table is keyed by ID such
	* that this method requires a separate initial query to map PHID to ID.
	*/
	public function withRepositoryPHIDs(array $phids) {
	$this->repositoryPHIDs = $phids;
	return $this;
	}

	/**
	* If a default repository is provided, ambiguous commit identifiers will
	* be assumed to belong to the default repository.
	*
	* For example, "r123" appearing in a commit message in repository X is
	* likely to be unambiguously "rX123". Normally the reference would be
	* considered ambiguous, but if you provide a default repository it will
	* be correctly resolved.
	*/
	public function withDefaultRepository(PhabricatorRepository $repository) {
	$this->defaultRepository = $repository;
	return $this;
	}

	public function withRepositoryIDs(array $repository_ids) {
	$this->repositoryIDs = array_unique($repository_ids);
	return $this;
	}

	public function needCommitData($need) {
	$this->needCommitData = $need;
	return $this;
	}

	public function needDrafts($need) {
	$this->needDrafts = $need;
	return $this;
	}

	public function needIdentities($need) {
	$this->needIdentities = $need;
	return $this;
	}

	public function needAuditRequests($need) {
	$this->needAuditRequests = $need;
	return $this;
	}

	public function needAuditAuthority(array $users) {
	assert_instances_of($users, 'PhabricatorUser');
	$this->needAuditAuthority = $users;
	return $this;
	}

	public function withAuditIDs(array $ids) {
	$this->auditIDs = $ids;
	return $this;
	}

	public function withAuditorPHIDs(array $auditor_phids) {
	$this->auditorPHIDs = $auditor_phids;
	return $this;
	}

	public function withResponsiblePHIDs(array $responsible_phids) {
	$this->responsiblePHIDs = $responsible_phids;
	return $this;
	}

	public function withPackagePHIDs(array $package_phids) {
	$this->packagePHIDs = $package_phids;
	return $this;
	}

	public function withUnreachable($unreachable) {
	$this->unreachable = $unreachable;
	return $this;
	}

	public function withPermanent($permanent) {
	$this->permanent = $permanent;
	return $this;
	}

	public function withStatuses(array $statuses) {
	$this->statuses = $statuses;
	return $this;
	}

	public function withEpochRange($min, $max) {
	$this->epochMin = $min;
	$this->epochMax = $max;
	return $this;
	}

	public function withImporting($importing) {
	$this->importing = $importing;
	return $this;
	}

	public function withAncestorsOf(array $refs) {
	$this->ancestorsOf = $refs;
	return $this;
	}

	public function getIdentifierMap() {
	if ($this->identifierMap === null) {
	throw new Exception(
	pht(
	'You must %s the query before accessing the identifier map.',
	'execute()'));
	}
	return $this->identifierMap;
	}

	protected function getPrimaryTableAlias() {
	return 'commit';
	}

	protected function willExecute() {
	if ($this->identifierMap === null) {
	$this->identifierMap = array();
	}
	}

	public function newResultObject() {
	return new PhabricatorRepositoryCommit();
	}

	protected function loadPage() {
	$table = $this->newResultObject();
	$conn = $table->establishConnection('r');

	$empty_exception = null;
	$subqueries = array();
	if ($this->responsiblePHIDs) {
	$base_authors = $this->authorPHIDs;
	$base_auditors = $this->auditorPHIDs;

	$responsible_phids = $this->responsiblePHIDs;
	if ($base_authors) {
	$all_authors = array_merge($base_authors, $responsible_phids);
	} else {
	$all_authors = $responsible_phids;
	}

	if ($base_auditors) {
	$all_auditors = array_merge($base_auditors, $responsible_phids);
	} else {
	$all_auditors = $responsible_phids;
	}

	$this->authorPHIDs = $all_authors;
	$this->auditorPHIDs = $base_auditors;
	try {
	$subqueries[] = $this->buildStandardPageQuery(
	$conn,
	$table->getTableName());
	} catch (PhabricatorEmptyQueryException $ex) {
	$empty_exception = $ex;
	}

	$this->authorPHIDs = $base_authors;
	$this->auditorPHIDs = $all_auditors;
	try {
	$subqueries[] = $this->buildStandardPageQuery(
	$conn,
	$table->getTableName());
	} catch (PhabricatorEmptyQueryException $ex) {
	$empty_exception = $ex;
	}
	} else {
	$subqueries[] = $this->buildStandardPageQuery(
	$conn,
	$table->getTableName());
	}

	if (!$subqueries && $empty_exception) {
	throw $empty_exception;
	}

	if (count($subqueries) > 1) {
	$unions = null;
	foreach ($subqueries as $subquery) {
	if (!$unions) {
	$unions = qsprintf(
	$conn,
	'(%Q)',
	$subquery);
	continue;
	}

	$unions = qsprintf(
	$conn,
	'%Q UNION DISTINCT (%Q)',
	$unions,
	$subquery);
	}

	$query = qsprintf(
	$conn,
	'%Q %Q %Q',
	$unions,
	$this->buildOrderClause($conn, true),
	$this->buildLimitClause($conn));
	} else {
	$query = head($subqueries);
	}

	$rows = queryfx_all($conn, '%Q', $query);
	$rows = $this->didLoadRawRows($rows);

	return $table->loadAllFromArray($rows);
	}

	protected function willFilterPage(array $commits) {
	$repository_ids = mpull($commits, 'getRepositoryID', 'getRepositoryID');
	$repos = id(new PhabricatorRepositoryQuery())
	->setViewer($this->getViewer())
	->withIDs($repository_ids)
	->execute();

	$min_qualified = PhabricatorRepository::MINIMUM_QUALIFIED_HASH;
	$result = array();

	foreach ($commits as $key => $commit) {
	$repo = idx($repos, $commit->getRepositoryID());
	if ($repo) {
	$commit->attachRepository($repo);
	} else {
	$this->didRejectResult($commit);
	unset($commits[$key]);
	continue;
	}

	// Build the identifierMap
	if ($this->identifiers !== null) {
	$ids = $this->identifiers;
	$prefixes = array(
	'r'.$commit->getRepository()->getCallsign(),
	'r'.$commit->getRepository()->getCallsign().':',
	'R'.$commit->getRepository()->getID().':',
	'', // No prefix is valid too and will only match the commitIdentifier
	);
	$suffix = $commit->getCommitIdentifier();

	if ($commit->getRepository()->isSVN()) {
	foreach ($prefixes as $prefix) {
	if (isset($ids[$prefix.$suffix])) {
	$result[$prefix.$suffix][] = $commit;
	}
	}
	} else {
	// This awkward construction is so we can link the commits up in O(N)
	// time instead of O(N^2).
	for ($ii = $min_qualified; $ii <= strlen($suffix); $ii++) {
	$part = substr($suffix, 0, $ii);
	foreach ($prefixes as $prefix) {
	if (isset($ids[$prefix.$part])) {
	$result[$prefix.$part][] = $commit;
	}
	}
	}
	}
	}
	}

	if ($result) {
	foreach ($result as $identifier => $matching_commits) {
	if (count($matching_commits) == 1) {
	$result[$identifier] = head($matching_commits);
	} else {
	// This reference is ambiguous (it matches more than one commit) so
	// don't link it.
	unset($result[$identifier]);
	}
	}
	$this->identifierMap += $result;
	}

	return $commits;
	}

	protected function didFilterPage(array $commits) {
	$viewer = $this->getViewer();

	if ($this->mustFilterRefs) {
	// If this flag is set, the query has an "Ancestors Of" constraint and
	// at least one of the constraining refs had too many ancestors for us
	// to apply the constraint with a big "commitIdentifier IN (%Ls)" clause.
	// We're going to filter each page and hope we get a full result set
	// before the query overheats.

	$ancestor_list = mpull($commits, 'getCommitIdentifier');
	$ancestor_list = array_values($ancestor_list);

	foreach ($this->ancestorsOf as $ref) {
	try {
	$ancestor_list = DiffusionQuery::callConduitWithDiffusionRequest(
	$viewer,
	DiffusionRequest::newFromDictionary(
	array(
	'repository' => $this->refRepository,
	'user' => $viewer,
	)),
	'diffusion.internal.ancestors',
	array(
	'ref' => $ref,
	'commits' => $ancestor_list,
	));
	} catch (ConduitClientException $ex) {
	throw new PhabricatorSearchConstraintException(
	$ex->getMessage());
	}

	if (!$ancestor_list) {
	break;
	}
	}

	$ancestor_list = array_fuse($ancestor_list);
	foreach ($commits as $key => $commit) {
	$identifier = $commit->getCommitIdentifier();
	if (!isset($ancestor_list[$identifier])) {
	$this->didRejectResult($commit);
	unset($commits[$key]);
	}
	}

	if (!$commits) {
	return $commits;
	}
	}

	if ($this->needCommitData) {
	$data = id(new PhabricatorRepositoryCommitData())->loadAllWhere(
	'commitID in (%Ld)',
	mpull($commits, 'getID'));
	$data = mpull($data, null, 'getCommitID');
	foreach ($commits as $commit) {
	$commit_data = idx($data, $commit->getID());
	if (!$commit_data) {
	$commit_data = new PhabricatorRepositoryCommitData();
	}
	$commit->attachCommitData($commit_data);
	}
	}

	if ($this->needAuditRequests) {
	$requests = id(new PhabricatorRepositoryAuditRequest())->loadAllWhere(
	'commitPHID IN (%Ls)',
	mpull($commits, 'getPHID'));

	$requests = mgroup($requests, 'getCommitPHID');
	foreach ($commits as $commit) {
	$audit_requests = idx($requests, $commit->getPHID(), array());
	$commit->attachAudits($audit_requests);
	foreach ($audit_requests as $audit_request) {
	$audit_request->attachCommit($commit);
	}
	}
	}

	if ($this->needIdentities) {
	$identity_phids = array_merge(
	mpull($commits, 'getAuthorIdentityPHID'),
	mpull($commits, 'getCommitterIdentityPHID'));

	$data = id(new PhabricatorRepositoryIdentityQuery())
	->withPHIDs($identity_phids)
	->setViewer($this->getViewer())
	->execute();
	$data = mpull($data, null, 'getPHID');

	foreach ($commits as $commit) {
	$author_identity = idx($data, $commit->getAuthorIdentityPHID());
	$committer_identity = idx($data, $commit->getCommitterIdentityPHID());
	$commit->attachIdentities($author_identity, $committer_identity);
	}
	}

	if ($this->needDrafts) {
	PhabricatorDraftEngine::attachDrafts(
	$viewer,
	$commits);
	}

	if ($this->needAuditAuthority) {
	$authority_users = $this->needAuditAuthority;

	// NOTE: This isn't very efficient since we're running two queries per
	// user, but there's currently no way to figure out authority for
	// multiple users in one query. Today, we only ever request authority for
	// a single user and single commit, so this has no practical impact.

	// NOTE: We're querying with the viewership of query viewer, not the
	// actual users. If the viewer can't see a project or package, they
	// won't be able to see who has authority on it. This is safer than
	// showing them true authority, and should never matter today, but it
	// also doesn't seem like a significant disclosure and might be
	// reasonable to adjust later if it causes something weird or confusing
	// to happen.

	$authority_map = array();
	foreach ($authority_users as $authority_user) {
	$authority_phid = $authority_user->getPHID();
	if (!$authority_phid) {
	continue;
	}

	$result_phids = array();

	// Users have authority over themselves.
	$result_phids[] = $authority_phid;

	// Users have authority over packages they own.
	$owned_packages = id(new PhabricatorOwnersPackageQuery())
	->setViewer($viewer)
	->withAuthorityPHIDs(array($authority_phid))
	->execute();
	foreach ($owned_packages as $package) {
	$result_phids[] = $package->getPHID();
	}

	// Users have authority over projects they're members of.
	$projects = id(new PhabricatorProjectQuery())
	->setViewer($viewer)
	->withMemberPHIDs(array($authority_phid))
	->execute();
	foreach ($projects as $project) {
	$result_phids[] = $project->getPHID();
	}

	$result_phids = array_fuse($result_phids);

	foreach ($commits as $commit) {
	$attach_phids = $result_phids;

	// NOTE: When modifying your own commits, you act only on behalf of
	// yourself, not your packages or projects. The idea here is that you
	// can't accept your own commits. In the future, this might change or
	// depend on configuration.
	$author_phid = $commit->getAuthorPHID();
	if ($author_phid == $authority_phid) {
	$attach_phids = array($author_phid);
	$attach_phids = array_fuse($attach_phids);
	}

	$commit->attachAuditAuthority($authority_user, $attach_phids);
	}
	}
	}

	return $commits;
	}

	protected function buildWhereClauseParts(AphrontDatabaseConnection $conn) {
	$where = parent::buildWhereClauseParts($conn);

	if ($this->repositoryPHIDs !== null) {
	$map_repositories = id(new PhabricatorRepositoryQuery())
	->setViewer($this->getViewer())
	->withPHIDs($this->repositoryPHIDs)
	->execute();

	if (!$map_repositories) {
	throw new PhabricatorEmptyQueryException();
	}
	$repository_ids = mpull($map_repositories, 'getID');
	if ($this->repositoryIDs !== null) {
	$repository_ids = array_merge($repository_ids, $this->repositoryIDs);
	}
	$this->withRepositoryIDs($repository_ids);
	}

	if ($this->ancestorsOf !== null) {
	if (count($this->repositoryIDs) !== 1) {
	throw new PhabricatorSearchConstraintException(
	pht(
	'To search for commits which are ancestors of particular refs, '.
	'you must constrain the search to exactly one repository.'));
	}

	$repository_id = head($this->repositoryIDs);
	$history_limit = $this->getRawResultLimit() * 32;
	$viewer = $this->getViewer();

	$repository = id(new PhabricatorRepositoryQuery())
	->setViewer($viewer)
	->withIDs(array($repository_id))
	->executeOne();

	if (!$repository) {
	throw new PhabricatorEmptyQueryException();
	}

	if ($repository->isSVN()) {
	throw new PhabricatorSearchConstraintException(
	pht(
	'Subversion does not support searching for ancestors of '.
	'a particular ref. This operation is not meaningful in '.
	'Subversion.'));
	}

	if ($repository->isHg()) {
	throw new PhabricatorSearchConstraintException(
	pht(
	'Mercurial does not currently support searching for ancestors of '.
	'a particular ref.'));
	}

	$can_constrain = true;
	$history_identifiers = array();
	foreach ($this->ancestorsOf as $key => $ref) {
	try {
	$raw_history = DiffusionQuery::callConduitWithDiffusionRequest(
	$viewer,
	DiffusionRequest::newFromDictionary(
	array(
	'repository' => $repository,
	'user' => $viewer,
	)),
	'diffusion.historyquery',
	array(
	'commit' => $ref,
	'limit' => $history_limit,
	));
	} catch (ConduitClientException $ex) {
	throw new PhabricatorSearchConstraintException(
	$ex->getMessage());
	}

	$ref_identifiers = array();
	foreach ($raw_history['pathChanges'] as $change) {
	$ref_identifiers[] = $change['commitIdentifier'];
	}

	// If this ref had fewer total commits than the limit, we're safe to
	// apply the constraint as a large `IN (...)` query for a list of
	// commit identifiers. This is efficient.
	if ($history_limit) {
	if (count($ref_identifiers) >= $history_limit) {
	$can_constrain = false;
	break;
	}
	}

	$history_identifiers += array_fuse($ref_identifiers);
	}

	// If all refs had a small number of ancestors, we can just put the
	// constraint into the query here and we're done. Otherwise, we need
	// to filter each page after it comes out of the MySQL layer.
	if ($can_constrain) {
	$where[] = qsprintf(
	$conn,
	'commit.commitIdentifier IN (%Ls)',
	$history_identifiers);
	} else {
	$this->mustFilterRefs = true;
	$this->refRepository = $repository;
	}
	}

	if ($this->ids !== null) {
	$where[] = qsprintf(
	$conn,
	'commit.id IN (%Ld)',
	$this->ids);
	}

	if ($this->phids !== null) {
	$where[] = qsprintf(
	$conn,
	'commit.phid IN (%Ls)',
	$this->phids);
	}

	if ($this->repositoryIDs !== null) {
	$where[] = qsprintf(
	$conn,
	'commit.repositoryID IN (%Ld)',
	$this->repositoryIDs);
	}

	if ($this->authorPHIDs !== null) {
	$author_phids = $this->authorPHIDs;
	if ($author_phids) {
	$author_phids = $this->selectPossibleAuthors($author_phids);
	if (!$author_phids) {
	throw new PhabricatorEmptyQueryException(
	pht('Author PHIDs contain no possible authors.'));
	}
	}

	$where[] = qsprintf(
	$conn,
	'commit.authorPHID IN (%Ls)',
	$author_phids);
	}

	if ($this->epochMin !== null) {
	$where[] = qsprintf(
	$conn,
	'commit.epoch >= %d',
	$this->epochMin);
	}

	if ($this->epochMax !== null) {
	$where[] = qsprintf(
	$conn,
	'commit.epoch <= %d',
	$this->epochMax);
	}

	if ($this->importing !== null) {
	if ($this->importing) {
	$where[] = qsprintf(
	$conn,
	'(commit.importStatus & %d) != %d',
	PhabricatorRepositoryCommit::IMPORTED_ALL,
	PhabricatorRepositoryCommit::IMPORTED_ALL);
	} else {
	$where[] = qsprintf(
	$conn,
	'(commit.importStatus & %d) = %d',
	PhabricatorRepositoryCommit::IMPORTED_ALL,
	PhabricatorRepositoryCommit::IMPORTED_ALL);
	}
	}

	if ($this->identifiers !== null) {
	$min_unqualified = PhabricatorRepository::MINIMUM_UNQUALIFIED_HASH;
	$min_qualified = PhabricatorRepository::MINIMUM_QUALIFIED_HASH;

	$refs = array();
	$bare = array();
	foreach ($this->identifiers as $identifier) {
	$matches = null;
	preg_match('/^(?:[rR]([A-Z]+:?\|[0-9]+:))?(.*)$/',
	$identifier, $matches);
	$repo = nonempty(rtrim($matches[1], ':'), null);
	$commit_identifier = nonempty($matches[2], null);

	if ($repo === null) {
	if ($this->defaultRepository) {
	$repo = $this->defaultRepository->getPHID();
	}
	}

	if ($repo === null) {
	if (strlen($commit_identifier) < $min_unqualified) {
	continue;
	}
	$bare[] = $commit_identifier;
	} else {
	$refs[] = array(
	'repository' => $repo,
	'identifier' => $commit_identifier,
	);
	}
	}

	$sql = array();

	foreach ($bare as $identifier) {
	$sql[] = qsprintf(
	$conn,
	'(commit.commitIdentifier LIKE %> AND '.
	'LENGTH(commit.commitIdentifier) = 40)',
	$identifier);
	}

	if ($refs) {
	$repositories = ipull($refs, 'repository');

	$repos = id(new PhabricatorRepositoryQuery())
	->setViewer($this->getViewer())
	->withIdentifiers($repositories);
	$repos->execute();

	$repos = $repos->getIdentifierMap();
	foreach ($refs as $key => $ref) {
	$repo = idx($repos, $ref['repository']);
	if (!$repo) {
	continue;
	}

	if ($repo->isSVN()) {
	if (!ctype_digit((string)$ref['identifier'])) {
	continue;
	}
	$sql[] = qsprintf(
	$conn,
	'(commit.repositoryID = %d AND commit.commitIdentifier = %s)',
	$repo->getID(),
	// NOTE: Because the 'commitIdentifier' column is a string, MySQL
	// ignores the index if we hand it an integer. Hand it a string.
	// See T3377.
	(int)$ref['identifier']);
	} else {
	- if (strlen($ref['identifier']) < $min_qualified) {
	+ if (!phutil_nonempty_string($ref['identifier']) \|\|
	+ strlen($ref['identifier']) < $min_qualified) {
	continue;
	}

	$identifier = $ref['identifier'];
	if (strlen($identifier) == 40) {
	// MySQL seems to do slightly better with this version if the
	// clause, so issue it if we have a full commit hash.
	$sql[] = qsprintf(
	$conn,
	'(commit.repositoryID = %d
	AND commit.commitIdentifier = %s)',
	$repo->getID(),
	$identifier);
	} else {
	$sql[] = qsprintf(
	$conn,
	'(commit.repositoryID = %d
	AND commit.commitIdentifier LIKE %>)',
	$repo->getID(),
	$identifier);
	}
	}
	}
	}

	if (!$sql) {
	// If we discarded all possible identifiers (e.g., they all referenced
	// bogus repositories or were all too short), make sure the query finds
	// nothing.
	throw new PhabricatorEmptyQueryException(
	pht('No commit identifiers.'));
	}

	$where[] = qsprintf($conn, '%LO', $sql);
	}

	if ($this->auditIDs !== null) {
	$where[] = qsprintf(
	$conn,
	'auditor.id IN (%Ld)',
	$this->auditIDs);
	}

	if ($this->auditorPHIDs !== null) {
	$where[] = qsprintf(
	$conn,
	'auditor.auditorPHID IN (%Ls)',
	$this->auditorPHIDs);
	}

	if ($this->statuses !== null) {
	$statuses = DiffusionCommitAuditStatus::newModernKeys(
	$this->statuses);

	$where[] = qsprintf(
	$conn,
	'commit.auditStatus IN (%Ls)',
	$statuses);
	}

	if ($this->packagePHIDs !== null) {
	$where[] = qsprintf(
	$conn,
	'package.dst IN (%Ls)',
	$this->packagePHIDs);
	}

	if ($this->unreachable !== null) {
	if ($this->unreachable) {
	$where[] = qsprintf(
	$conn,
	'(commit.importStatus & %d) = %d',
	PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE,
	PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE);
	} else {
	$where[] = qsprintf(
	$conn,
	'(commit.importStatus & %d) = 0',
	PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE);
	}
	}

	if ($this->permanent !== null) {
	if ($this->permanent) {
	$where[] = qsprintf(
	$conn,
	'(commit.importStatus & %d) = %d',
	PhabricatorRepositoryCommit::IMPORTED_PERMANENT,
	PhabricatorRepositoryCommit::IMPORTED_PERMANENT);
	} else {
	$where[] = qsprintf(
	$conn,
	'(commit.importStatus & %d) = 0',
	PhabricatorRepositoryCommit::IMPORTED_PERMANENT);
	}
	}

	return $where;
	}

	protected function didFilterResults(array $filtered) {
	if ($this->identifierMap) {
	foreach ($this->identifierMap as $name => $commit) {
	if (isset($filtered[$commit->getPHID()])) {
	unset($this->identifierMap[$name]);
	}
	}
	}
	}

	private function shouldJoinAuditor() {
	return ($this->auditIDs \|\| $this->auditorPHIDs);
	}

	private function shouldJoinOwners() {
	return (bool)$this->packagePHIDs;
	}

	protected function buildJoinClauseParts(AphrontDatabaseConnection $conn) {
	$join = parent::buildJoinClauseParts($conn);
	$audit_request = new PhabricatorRepositoryAuditRequest();

	if ($this->shouldJoinAuditor()) {
	$join[] = qsprintf(
	$conn,
	'JOIN %T auditor ON commit.phid = auditor.commitPHID',
	$audit_request->getTableName());
	}

	if ($this->shouldJoinOwners()) {
	$join[] = qsprintf(
	$conn,
	'JOIN %T package ON commit.phid = package.src
	AND package.type = %s',
	PhabricatorEdgeConfig::TABLE_NAME_EDGE,
	DiffusionCommitHasPackageEdgeType::EDGECONST);
	}

	return $join;
	}

	protected function shouldGroupQueryResultRows() {
	if ($this->shouldJoinAuditor()) {
	return true;
	}

	if ($this->shouldJoinOwners()) {
	return true;
	}

	return parent::shouldGroupQueryResultRows();
	}

	public function getQueryApplicationClass() {
	return PhabricatorDiffusionApplication::class;
	}

	public function getOrderableColumns() {
	return parent::getOrderableColumns() + array(
	'epoch' => array(
	'table' => $this->getPrimaryTableAlias(),
	'column' => 'epoch',
	'type' => 'int',
	'reverse' => false,
	),
	);
	}

	protected function newPagingMapFromPartialObject($object) {
	return array(
	'id' => (int)$object->getID(),
	'epoch' => (int)$object->getEpoch(),
	);
	}

	public function getBuiltinOrders() {
	$parent = parent::getBuiltinOrders();

	// Rename the default ID-based orders.
	$parent['importnew'] = array(
	'name' => pht('Import Date (Newest First)'),
	) + $parent['newest'];

	$parent['importold'] = array(
	'name' => pht('Import Date (Oldest First)'),
	) + $parent['oldest'];

	return array(
	'newest' => array(
	'vector' => array('epoch', 'id'),
	'name' => pht('Commit Date (Newest First)'),
	),
	'oldest' => array(
	'vector' => array('-epoch', '-id'),
	'name' => pht('Commit Date (Oldest First)'),
	),
	) + $parent;
	}

	private function selectPossibleAuthors(array $phids) {
	// See PHI1057. Select PHIDs which might possibly be commit authors from
	// a larger list of PHIDs. This primarily filters out packages and projects
	// from "Responsible Users: ..." queries. Our goal in performing this
	// filtering is to improve the performance of the final query.

	foreach ($phids as $key => $phid) {
	if (phid_get_type($phid) !== PhabricatorPeopleUserPHIDType::TYPECONST) {
	unset($phids[$key]);
	}
	}

	return $phids;
	}


	}

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