DiffusionPathTreeController.php
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	<?php

	final class DiffusionPathTreeController extends DiffusionController {

	protected function processDiffusionRequest(AphrontRequest $request) {
	$drequest = $this->getDiffusionRequest();

	if (!$drequest->getRepository()->canUsePathTree()) {
	return new Aphront404Response();
	}

	$paths = $this->callConduitWithDiffusionRequest(
	'diffusion.querypaths',
	array(
	'path' => $drequest->getPath(),
	'commit' => $drequest->getCommit(),
	));

	$tree = array();
	foreach ($paths as $path) {
	$parts = preg_split('((?<=/))', $path);
	$cursor = &$tree;
	foreach ($parts as $part) {
	if (!is_array($cursor)) {
	$cursor = array();
	}
	if (!isset($cursor[$part])) {
	$cursor[$part] = 1;
	}
	$cursor = &$cursor[$part];
	}
	}

	return id(new AphrontAjaxResponse())->setContent(array('tree' => $tree));
	}
	}