DiffusionPathValidateController.php
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	<?php

	final class DiffusionPathValidateController extends DiffusionController {

	protected function getRepositoryIdentifierFromRequest(
	AphrontRequest $request) {
	return $request->getStr('repositoryPHID');
	}

	public function handleRequest(AphrontRequest $request) {
	$response = $this->loadDiffusionContext();
	if ($response) {
	return $response;
	}

	$viewer = $this->getViewer();
	$drequest = $this->getDiffusionRequest();
	$repository = $drequest->getRepository();

	$path = $request->getStr('path');
	$path = ltrim($path, '/');

	$browse_results = DiffusionBrowseResultSet::newFromConduit(
	$this->callConduitWithDiffusionRequest(
	'diffusion.browsequery',
	array(
	'path' => $path,
	'commit' => $drequest->getCommit(),
	'needValidityOnly' => true,
	)));
	$valid = $browse_results->isValidResults();

	if (!$valid) {
	switch ($browse_results->getReasonForEmptyResultSet()) {
	case DiffusionBrowseResultSet::REASON_IS_FILE:
	$valid = true;
	break;
	case DiffusionBrowseResultSet::REASON_IS_EMPTY:
	$valid = true;
	break;
	}
	}

	$output = array(
	'valid' => (bool)$valid,
	);

	if (!$valid) {
	$branch = $drequest->getBranch();
	if ($branch) {
	$message = pht('Not found in %s', $branch);
	} else {
	$message = pht('Not found at %s', 'HEAD');
	}
	} else {
	$message = pht('OK');
	}

	$output['message'] = $message;

	return id(new AphrontAjaxResponse())->setContent($output);
	}
	}