PhabricatorTransactionsFulltextEngineExtension.php
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PhabricatorTransactionsFulltextEngineExtension.php
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	<?php

	final class PhabricatorTransactionsFulltextEngineExtension
	extends PhabricatorFulltextEngineExtension {

	const EXTENSIONKEY = 'transactions';

	public function getExtensionName() {
	return pht('Comments');
	}

	public function shouldEnrichFulltextObject($object) {
	return ($object instanceof PhabricatorApplicationTransactionInterface);
	}

	public function enrichFulltextObject(
	$object,
	PhabricatorSearchAbstractDocument $document) {

	$query = PhabricatorApplicationTransactionQuery::newQueryForObject($object);
	if (!$query) {
	return;
	}

	$query
	->setViewer($this->getViewer())
	->withObjectPHIDs(array($object->getPHID()))
	->withComments(true)
	->needComments(true);

	// See PHI719. Users occasionally create objects with huge numbers of
	// comments, which can be slow to index. We handle this with reasonable
	// grace: at time of writing, we can index a task with 100K comments in
	// about 30 seconds. However, we do need to hold all the comments in
	// memory in the AbstractDocument, so there's some practical limit to what
	// we can realistically index.

	// Since objects with more than 1,000 comments are not likely to be
	// legitimate objects with actual discussion, index only the first
	// thousand comments.

	$query
	->setOrderVector(array('-id'))
	->setLimit(1000);

	$xactions = $query->execute();

	foreach ($xactions as $xaction) {
	if (!$xaction->hasComment()) {
	continue;
	}

	$comment = $xaction->getComment();

	$document->addField(
	PhabricatorSearchDocumentFieldType::FIELD_COMMENT,
	$comment->getContent());
	}
	}

	}