PhabricatorFulltextEngine.php
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	<?php

	abstract class PhabricatorFulltextEngine
	extends Phobject {

	private $object;

	public function setObject($object) {
	$this->object = $object;
	return $this;
	}

	public function getObject() {
	return $this->object;
	}

	protected function getViewer() {
	return PhabricatorUser::getOmnipotentUser();
	}

	abstract protected function buildAbstractDocument(
	PhabricatorSearchAbstractDocument $document,
	$object);

	final public function buildFulltextIndexes() {
	$object = $this->getObject();

	$extensions = PhabricatorFulltextEngineExtension::getAllExtensions();

	$enrich_extensions = array();
	$index_extensions = array();
	foreach ($extensions as $key => $extension) {
	if ($extension->shouldEnrichFulltextObject($object)) {
	$enrich_extensions[] = $extension;
	}

	if ($extension->shouldIndexFulltextObject($object)) {
	$index_extensions[] = $extension;
	}
	}

	$document = $this->newAbstractDocument($object);

	$this->buildAbstractDocument($document, $object);

	foreach ($enrich_extensions as $extension) {
	$extension->enrichFulltextObject($object, $document);
	}

	foreach ($index_extensions as $extension) {
	$extension->indexFulltextObject($object, $document);
	}

	PhabricatorSearchService::reindexAbstractDocument($document);
	}

	protected function newAbstractDocument($object) {
	$phid = $object->getPHID();
	return id(new PhabricatorSearchAbstractDocument())
	->setPHID($phid)
	->setDocumentType(phid_get_type($phid));
	}

	}