PhabricatorSearchDocumentQuery.php
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	<?php

	final class PhabricatorSearchDocumentQuery
	extends PhabricatorPolicyAwareQuery {

	private $savedQuery;
	private $objectCapabilities;
	private $unfilteredOffset;
	private $fulltextResultSet;

	public function withSavedQuery(PhabricatorSavedQuery $query) {
	$this->savedQuery = $query;
	return $this;
	}

	public function requireObjectCapabilities(array $capabilities) {
	$this->objectCapabilities = $capabilities;
	return $this;
	}

	protected function getRequiredObjectCapabilities() {
	if ($this->objectCapabilities) {
	return $this->objectCapabilities;
	}

	return $this->getRequiredCapabilities();
	}

	public function getFulltextResultSet() {
	if (!$this->fulltextResultSet) {
	throw new PhutilInvalidStateException('execute');
	}

	return $this->fulltextResultSet;
	}

	protected function willExecute() {
	$this->unfilteredOffset = 0;
	$this->fulltextResultSet = null;
	}

	protected function loadPage() {
	// NOTE: The offset and limit information in the inherited properties of
	// this object represent a policy-filtered offset and limit, but the
	// underlying query engine needs an unfiltered offset and limit. We keep
	// track of an unfiltered result offset internally.

	$query = id(clone($this->savedQuery))
	->setParameter('offset', $this->unfilteredOffset)
	->setParameter('limit', $this->getRawResultLimit());

	$result_set = PhabricatorSearchService::newResultSet($query, $this);
	$phids = $result_set->getPHIDs();

	$this->fulltextResultSet = $result_set;
	$this->unfilteredOffset += count($phids);

	$handles = id(new PhabricatorHandleQuery())
	->setViewer($this->getViewer())
	->requireObjectCapabilities($this->getRequiredObjectCapabilities())
	->withPHIDs($phids)
	->execute();

	// Retain engine order.
	$handles = array_select_keys($handles, $phids);

	return $handles;
	}

	protected function willFilterPage(array $handles) {
	// NOTE: This is used by the object selector dialog to exclude the object
	// you're looking at, so that, e.g., a task can't be set as a dependency
	// of itself in the UI.

	// TODO: Remove this after object selection moves to ApplicationSearch.

	$exclude = array();
	if ($this->savedQuery) {
	$exclude_phids = $this->savedQuery->getParameter('excludePHIDs', array());
	$exclude = array_fuse($exclude_phids);
	}

	foreach ($handles as $key => $handle) {
	if (!$handle->isComplete()) {
	unset($handles[$key]);
	continue;
	}
	if ($handle->getPolicyFiltered()) {
	unset($handles[$key]);
	continue;
	}
	if (isset($exclude[$handle->getPHID()])) {
	unset($handles[$key]);
	continue;
	}
	}

	return $handles;
	}

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

	protected function nextPage(array $page) {
	// We already updated the internal offset in `loadPage()` after loading
	// results, so we do not need to make any additional state updates here.
	return $this;
	}

	}

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