ConpherenceThreadQuery.php
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ConpherenceThreadQuery.php
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	<?php

	final class ConpherenceThreadQuery
	extends PhabricatorCursorPagedPolicyAwareQuery {

	const TRANSACTION_LIMIT = 100;

	private $phids;
	private $ids;
	private $participantPHIDs;
	private $needParticipants;
	private $needTransactions;
	private $afterTransactionID;
	private $beforeTransactionID;
	private $transactionLimit;
	private $fulltext;
	private $needProfileImage;

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

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

	public function needTransactions($need_transactions) {
	$this->needTransactions = $need_transactions;
	return $this;
	}

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

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

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

	public function setAfterTransactionID($id) {
	$this->afterTransactionID = $id;
	return $this;
	}

	public function setBeforeTransactionID($id) {
	$this->beforeTransactionID = $id;
	return $this;
	}

	public function setTransactionLimit($transaction_limit) {
	$this->transactionLimit = $transaction_limit;
	return $this;
	}

	public function getTransactionLimit() {
	return $this->transactionLimit;
	}

	public function withFulltext($query) {
	$this->fulltext = $query;
	return $this;
	}

	public function withTitleNgrams($ngrams) {
	return $this->withNgramsConstraint(
	id(new ConpherenceThreadTitleNgrams()),
	$ngrams);
	}

	protected function loadPage() {
	$table = new ConpherenceThread();
	$conn_r = $table->establishConnection('r');

	$data = queryfx_all(
	$conn_r,
	'SELECT thread.* FROM %T thread %Q %Q %Q %Q %Q',
	$table->getTableName(),
	$this->buildJoinClause($conn_r),
	$this->buildWhereClause($conn_r),
	$this->buildGroupClause($conn_r),
	$this->buildOrderClause($conn_r),
	$this->buildLimitClause($conn_r));

	$conpherences = $table->loadAllFromArray($data);

	if ($conpherences) {
	$conpherences = mpull($conpherences, null, 'getPHID');
	$this->loadParticipantsAndInitHandles($conpherences);
	if ($this->needParticipants) {
	$this->loadCoreHandles($conpherences, 'getParticipantPHIDs');
	}
	if ($this->needTransactions) {
	$this->loadTransactionsAndHandles($conpherences);
	}
	if ($this->needProfileImage) {
	$default = null;
	$file_phids = mpull($conpherences, 'getProfileImagePHID');
	$file_phids = array_filter($file_phids);
	if ($file_phids) {
	$files = id(new PhabricatorFileQuery())
	->setParentQuery($this)
	->setViewer($this->getViewer())
	->withPHIDs($file_phids)
	->execute();
	$files = mpull($files, null, 'getPHID');
	} else {
	$files = array();
	}

	foreach ($conpherences as $conpherence) {
	$file = idx($files, $conpherence->getProfileImagePHID());
	if (!$file) {
	if (!$default) {
	$default = PhabricatorFile::loadBuiltin(
	$this->getViewer(),
	'conpherence.png');
	}
	$file = $default;
	}
	$conpherence->attachProfileImageFile($file);
	}
	}
	}

	return $conpherences;
	}

	protected function buildGroupClause(AphrontDatabaseConnection $conn_r) {
	if ($this->participantPHIDs !== null \|\|
	phutil_nonempty_string($this->fulltext)) {
	return qsprintf($conn_r, 'GROUP BY thread.id');
	} else {
	return $this->buildApplicationSearchGroupClause($conn_r);
	}
	}

	protected function buildJoinClauseParts(AphrontDatabaseConnection $conn) {
	$joins = parent::buildJoinClauseParts($conn);

	if ($this->participantPHIDs !== null) {
	$joins[] = qsprintf(
	$conn,
	'JOIN %T p ON p.conpherencePHID = thread.phid',
	id(new ConpherenceParticipant())->getTableName());
	}

	if (phutil_nonempty_string($this->fulltext)) {
	$joins[] = qsprintf(
	$conn,
	'JOIN %T idx ON idx.threadPHID = thread.phid',
	id(new ConpherenceIndex())->getTableName());
	}

	// See note in buildWhereClauseParts() about this optimization.
	$viewer = $this->getViewer();
	if (!$viewer->isOmnipotent() && $viewer->isLoggedIn()) {
	$joins[] = qsprintf(
	$conn,
	'LEFT JOIN %T vp ON vp.conpherencePHID = thread.phid
	AND vp.participantPHID = %s',
	id(new ConpherenceParticipant())->getTableName(),
	$viewer->getPHID());
	}

	return $joins;
	}

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

	// Optimize policy filtering of private rooms. If we are not looking for
	// particular rooms by ID or PHID, we can just skip over any rooms with
	// "View Policy: Room Participants" if the viewer isn't a participant: we
	// know they won't be able to see the room.
	// This avoids overheating browse/search queries, since it's common for
	// a large number of rooms to be private and have this view policy.
	$viewer = $this->getViewer();

	$can_optimize =
	!$viewer->isOmnipotent() &&
	($this->ids === null) &&
	($this->phids === null);

	if ($can_optimize) {
	$members_policy = id(new ConpherenceThreadMembersPolicyRule())
	->getObjectPolicyFullKey();
	$policies = array(
	$members_policy,
	PhabricatorPolicies::POLICY_USER,
	PhabricatorPolicies::POLICY_ADMIN,
	PhabricatorPolicies::POLICY_NOONE,
	);

	if ($viewer->isLoggedIn()) {
	$where[] = qsprintf(
	$conn,
	'thread.viewPolicy NOT IN (%Ls) OR vp.participantPHID = %s',
	$policies,
	$viewer->getPHID());
	} else {
	$where[] = qsprintf(
	$conn,
	'thread.viewPolicy NOT IN (%Ls)',
	$policies);
	}
	}

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

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

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

	if (phutil_nonempty_string($this->fulltext)) {
	$where[] = qsprintf(
	$conn,
	'MATCH(idx.corpus) AGAINST (%s IN BOOLEAN MODE)',
	$this->fulltext);
	}

	return $where;
	}

	private function loadParticipantsAndInitHandles(array $conpherences) {
	$participants = id(new ConpherenceParticipant())
	->loadAllWhere('conpherencePHID IN (%Ls)', array_keys($conpherences));
	$map = mgroup($participants, 'getConpherencePHID');

	foreach ($conpherences as $current_conpherence) {
	$conpherence_phid = $current_conpherence->getPHID();

	$conpherence_participants = idx(
	$map,
	$conpherence_phid,
	array());

	$conpherence_participants = mpull(
	$conpherence_participants,
	null,
	'getParticipantPHID');

	$current_conpherence->attachParticipants($conpherence_participants);
	$current_conpherence->attachHandles(array());
	}

	return $this;
	}

	private function loadCoreHandles(
	array $conpherences,
	$method) {

	$handle_phids = array();
	foreach ($conpherences as $conpherence) {
	$handle_phids[$conpherence->getPHID()] =
	$conpherence->$method();
	}
	$flat_phids = array_mergev($handle_phids);
	$viewer = $this->getViewer();
	$handles = $viewer->loadHandles($flat_phids);
	$handles = iterator_to_array($handles);
	foreach ($handle_phids as $conpherence_phid => $phids) {
	$conpherence = $conpherences[$conpherence_phid];
	$conpherence->attachHandles(
	$conpherence->getHandles() + array_select_keys($handles, $phids));
	}
	return $this;
	}

	private function loadTransactionsAndHandles(array $conpherences) {
	// NOTE: This is older code which has been modernized to the minimum
	// standard required by T13266. It probably isn't the best available
	// approach to the problems it solves.

	$limit = $this->getTransactionLimit();
	if ($limit) {
	// fetch an extra for "show older" scenarios
	$limit = $limit + 1;
	} else {
	$limit = 0xFFFF;
	}

	$pager = id(new AphrontCursorPagerView())
	->setPageSize($limit);

	// We have to flip these for the underlying query class. The semantics of
	// paging are tricky business.
	if ($this->afterTransactionID) {
	$pager->setBeforeID($this->afterTransactionID);
	} else if ($this->beforeTransactionID) {
	$pager->setAfterID($this->beforeTransactionID);
	}

	$transactions = id(new ConpherenceTransactionQuery())
	->setViewer($this->getViewer())
	->withObjectPHIDs(array_keys($conpherences))
	->needHandles(true)
	->executeWithCursorPager($pager);

	$transactions = mgroup($transactions, 'getObjectPHID');
	foreach ($conpherences as $phid => $conpherence) {
	$current_transactions = idx($transactions, $phid, array());
	$handles = array();
	foreach ($current_transactions as $transaction) {
	$handles += $transaction->getHandles();
	}
	$conpherence->attachHandles($conpherence->getHandles() + $handles);
	$conpherence->attachTransactions($current_transactions);
	}
	return $this;
	}

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

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

	}

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