PhabricatorSearchDocumentIndexer.php
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	<?php

	/**
	* @group search
	*/
	abstract class PhabricatorSearchDocumentIndexer {

	abstract public function getIndexableObject();
	abstract protected function buildAbstractDocumentByPHID($phid);

	public function shouldIndexDocumentByPHID($phid) {
	$object = $this->getIndexableObject();
	return (phid_get_type($phid) == phid_get_type($object->generatePHID()));
	}

	public function getIndexIterator() {
	$object = $this->getIndexableObject();
	return new LiskMigrationIterator($object);
	}

	protected function loadDocumentByPHID($phid) {
	$object = $this->getIndexableObject();
	$document = $object->loadOneWhere('phid = %s', $phid);
	if (!$document) {
	throw new Exception("Unable to load document by phid '{$phid}'!");
	}
	return $document;
	}

	public function indexDocumentByPHID($phid) {
	try {
	$document = $this->buildAbstractDocumentByPHID($phid);

	$engine = PhabricatorSearchEngineSelector::newSelector()->newEngine();
	try {
	$engine->reindexAbstractDocument($document);
	} catch (Exception $ex) {
	$phid = $document->getPHID();
	$class = get_class($engine);

	phlog("Unable to index document {$phid} by engine {$class}.");
	phlog($ex);
	}

	} catch (Exception $ex) {
	$class = get_class($this);
	phlog("Unable to build document {$phid} by indexer {$class}.");
	phlog($ex);
	}

	return $this;
	}

	}