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	diff --git a/src/applications/phriction/controller/PhrictionDocumentController.php b/src/applications/phriction/controller/PhrictionDocumentController.php
	index 1a99de9cb2..f18a9f7bc2 100644
	--- a/src/applications/phriction/controller/PhrictionDocumentController.php
	+++ b/src/applications/phriction/controller/PhrictionDocumentController.php
	@@ -1,396 +1,398 @@
	<?php

	/*
	* Copyright 2012 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	/**
	* @group phriction
	*/
	final class PhrictionDocumentController
	extends PhrictionController {

	private $slug;

	public function willProcessRequest(array $data) {
	$this->slug = $data['slug'];
	}

	public function processRequest() {

	$request = $this->getRequest();
	$user = $request->getUser();

	$slug = PhabricatorSlug::normalize($this->slug);
	if ($slug != $this->slug) {
	$uri = PhrictionDocument::getSlugURI($slug);
	// Canonicalize pages to their one true URI.
	return id(new AphrontRedirectResponse())->setURI($uri);
	}

	require_celerity_resource('phriction-document-css');

	$document = id(new PhrictionDocument())->loadOneWhere(
	'slug = %s',
	$slug);

	$breadcrumbs = $this->renderBreadcrumbs($slug);
	$version_note = null;

	if (!$document) {

	if (PhrictionDocument::isProjectSlug($slug)) {
	$project = id(new PhabricatorProject())->loadOneWhere(
	'phrictionSlug = %s',
	PhrictionDocument::getProjectSlugIdentifier($slug));
	if (!$project) {
	return new Aphront404Response();
	}
	}
	$create_uri = '/phriction/edit/?slug='.$slug;
	$create_sentence =
	'You can <strong>'.
	phutil_render_tag(
	'a',
	array(
	'href' => $create_uri,
	),
	'create a new document').
	'</strong>.';
	$button = phutil_render_tag(
	'a',
	array(
	'href' => $create_uri,
	'class' => 'green button',
	),
	'Create Page');

	$page_content =
	'<div class="phriction-content">'.
	'<em>No content here!</em><br />'.
	'No document found at <tt>'.phutil_escape_html($slug).'</tt>. '.
	$create_sentence.
	'</div>';
	$page_title = 'Page Not Found';
	$buttons = $button;
	} else {
	$version = $request->getInt('v');
	if ($version) {
	$content = id(new PhrictionContent())->loadOneWhere(
	'documentID = %d AND version = %d',
	$document->getID(),
	$version);
	if (!$content) {
	return new Aphront404Response();
	}

	if ($content->getID() != $document->getContentID()) {
	$version_note = new AphrontErrorView();
	$version_note->setSeverity(AphrontErrorView::SEVERITY_NOTICE);
	$version_note->setTitle('Older Version');
	$version_note->appendChild(
	'You are viewing an older version of this document, as it '.
	'appeared on '.
	phabricator_datetime($content->getDateCreated(), $user).'.');
	}
	} else {
	$content = id(new PhrictionContent())->load($document->getContentID());
	}
	$page_title = $content->getTitle();

	$project_phid = null;
	if (PhrictionDocument::isProjectSlug($slug)) {
	$project = id(new PhabricatorProject())->loadOneWhere(
	'phrictionSlug = %s',
	PhrictionDocument::getProjectSlugIdentifier($slug));
	- $project_phid = $project->getPHID();
	+ if ($project) {
	+ $project_phid = $project->getPHID();
	+ }
	}

	$phids = array_filter(
	array(
	$content->getAuthorPHID(),
	$project_phid,
	));
	$handles = id(new PhabricatorObjectHandleData($phids))->loadHandles();

	$age = time() - $content->getDateCreated();
	$age = floor($age / (60 * 60 * 24));

	if ($age < 1) {
	$when = 'today';
	} else if ($age == 1) {
	$when = 'yesterday';
	} else {
	$when = "{$age} days ago";
	}


	$project_info = null;
	if ($project_phid) {
	$project_info =
	'<br />This document is about the project '.
	$handles[$project_phid]->renderLink().'.';
	}



	$byline =
	'<div class="phriction-byline">'.
	"Last updated {$when} by ".
	$handles[$content->getAuthorPHID()]->renderLink().'.'.
	$project_info.
	'</div>';


	$doc_status = $document->getStatus();
	if ($doc_status == PhrictionDocumentStatus::STATUS_EXISTS) {
	$core_content = $content->renderContent();
	} else if ($doc_status == PhrictionDocumentStatus::STATUS_DELETED) {
	$notice = new AphrontErrorView();
	$notice->setSeverity(AphrontErrorView::SEVERITY_NOTICE);
	$notice->setTitle('Document Deleted');
	$notice->appendChild(
	'This document has been deleted. You can edit it to put new content '.
	'here, or use history to revert to an earlier version.');
	$core_content = $notice->render();
	} else {
	throw new Exception("Unknown document status '{$doc_status}'!");
	}

	$page_content =
	'<div class="phriction-content">'.
	$byline.
	$core_content.
	'</div>';

	$edit_button = phutil_render_tag(
	'a',
	array(
	'href' => '/phriction/edit/'.$document->getID().'/',
	'class' => 'button',
	),
	'Edit Document');
	$history_button = phutil_render_tag(
	'a',
	array(
	'href' => PhrictionDocument::getSlugURI($slug, 'history'),
	'class' => 'button grey',
	),
	'View History');
	// these float right so history_button which is right most goes first
	$buttons = $history_button.$edit_button;
	}

	if ($version_note) {
	$version_note = $version_note->render();
	}

	$children = $this->renderChildren($slug);

	$page =
	'<div class="phriction-header">'.
	$buttons.
	'<h1>'.phutil_escape_html($page_title).'</h1>'.
	$breadcrumbs.
	'</div>'.
	$version_note.
	$page_content.
	$children;

	return $this->buildStandardPageResponse(
	$page,
	array(
	'title' => 'Phriction - '.$page_title,
	));

	}

	private function renderBreadcrumbs($slug) {

	$ancestor_handles = array();
	$ancestral_slugs = PhabricatorSlug::getAncestry($slug);
	$ancestral_slugs[] = $slug;
	if ($ancestral_slugs) {
	$empty_slugs = array_fill_keys($ancestral_slugs, null);
	$ancestors = id(new PhrictionDocument())->loadAllWhere(
	'slug IN (%Ls)',
	$ancestral_slugs);
	$ancestors = mpull($ancestors, null, 'getSlug');

	$ancestor_phids = mpull($ancestors, 'getPHID');
	$handles = array();
	if ($ancestor_phids) {
	$handles = id(new PhabricatorObjectHandleData($ancestor_phids))
	->loadHandles();
	}

	$ancestor_handles = array();
	foreach ($ancestral_slugs as $slug) {
	if (isset($ancestors[$slug])) {
	$ancestor_handles[] = $handles[$ancestors[$slug]->getPHID()];
	} else {
	$handle = new PhabricatorObjectHandle();
	$handle->setName(PhabricatorSlug::getDefaultTitle($slug));
	$handle->setURI(PhrictionDocument::getSlugURI($slug));
	$ancestor_handles[] = $handle;
	}
	}
	}

	$breadcrumbs = array();
	foreach ($ancestor_handles as $ancestor_handle) {
	$breadcrumbs[] = $ancestor_handle->renderLink();
	}

	$list = phutil_render_tag(
	'a',
	array(
	'href' => '/phriction/',
	),
	'Document Index');

	return
	'<div class="phriction-breadcrumbs">'.
	$list.' · '.
	'<span class="phriction-document-crumbs">'.
	implode(" \xC2\xBB ", $breadcrumbs).
	'</span>'.
	'</div>';
	}

	private function renderChildren($slug) {
	$document_dao = new PhrictionDocument();
	$content_dao = new PhrictionContent();
	$conn = $document_dao->establishConnection('r');

	$limit = 50;
	$d_child = PhabricatorSlug::getDepth($slug) + 1;
	$d_grandchild = PhabricatorSlug::getDepth($slug) + 2;

	// Select children and grandchildren.
	$children = queryfx_all(
	$conn,
	'SELECT d.slug, d.depth, c.title FROM %T d JOIN %T c
	ON d.contentID = c.id
	WHERE d.slug LIKE %> AND d.depth IN (%d, %d)
	AND d.status = %d
	ORDER BY d.depth, c.title LIMIT %d',
	$document_dao->getTableName(),
	$content_dao->getTableName(),
	($slug == '/' ? '' : $slug),
	$d_child,
	$d_grandchild,
	PhrictionDocumentStatus::STATUS_EXISTS,
	$limit);

	if (!$children) {
	return;
	}

	// We're going to render in one of three modes to try to accommodate
	// different information scales:
	//
	// - If we found fewer than $limit rows, we know we have all the children
	// and grandchildren and there aren't all that many. We can just render
	// everything.
	// - If we found $limit rows but the results included some grandchildren,
	// we just throw them out and render only the children, as we know we
	// have them all.
	// - If we found $limit rows and the results have no grandchildren, we
	// have a ton of children. Render them and then let the user know that
	// this is not an exhaustive list.

	if (count($children) == $limit) {
	$more_children = true;
	foreach ($children as $child) {
	if ($child['depth'] == $d_grandchild) {
	$more_children = false;
	}
	}
	$show_grandchildren = false;
	} else {
	$show_grandchildren = true;
	$more_children = false;
	}

	$grandchildren = array();
	foreach ($children as $key => $child) {
	if ($child['depth'] == $d_child) {
	continue;
	} else {
	unset($children[$key]);
	if ($show_grandchildren) {
	$ancestors = PhabricatorSlug::getAncestry($child['slug']);
	$grandchildren[end($ancestors)][] = $child;
	}
	}
	}

	// Fill in any missing children.
	$known_slugs = ipull($children, null, 'slug');
	foreach ($grandchildren as $slug => $ignored) {
	if (empty($known_slugs[$slug])) {
	$children[] = array(
	'slug' => $slug,
	'depth' => $d_child,
	'title' => PhabricatorSlug::getDefaultTitle($slug),
	'empty' => true,
	);
	}
	}

	$list = array();
	$list[] = '<ul>';
	foreach ($children as $child) {
	$list[] = $this->renderChildDocumentLink($child);
	$grand = idx($grandchildren, $child['slug'], array());
	if ($grand) {
	$list[] = '<ul>';
	foreach ($grand as $grandchild) {
	$list[] = $this->renderChildDocumentLink($grandchild);
	}
	$list[] = '</ul>';
	}
	}
	if ($more_children) {
	$list[] = '<li>More...</li>';
	}
	$list[] = '</ul>';
	$list = implode("\n", $list);

	return
	'<div class="phriction-children">'.
	'<div class="phriction-children-header">Document Hierarchy</div>'.
	$list.
	'</div>';
	}

	private function renderChildDocumentLink(array $info) {
	$title = nonempty($info['title'], '(Untitled Document)');
	$item = phutil_render_tag(
	'a',
	array(
	'href' => PhrictionDocument::getSlugURI($info['slug']),
	),
	phutil_escape_html($title));

	if (isset($info['empty'])) {
	$item = '<em>'.$item.'</em>';
	}

	return '<li>'.$item.'</li>';
	}

	}

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