ProjectRemarkupRule.php
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	<?php

	/**
	* @group project
	*/
	final class ProjectRemarkupRule
	extends PhabricatorRemarkupRuleObject {

	protected function getObjectNamePrefix() {
	return '#';
	}

	protected function getObjectIDPattern() {
	// NOTE: This explicitly does not match strings which contain only
	// digits, because digit strings like "#123" are used to reference tasks at
	// Facebook and are somewhat conventional in general.
	return '[^\s.!,:;][^\s\d.!,:;]+[^\s.!,:;]';
	}

	protected function loadObjects(array $ids) {
	$viewer = $this->getEngine()->getConfig('viewer');

	// If the user types "#YoloSwag", we still want to match "#yoloswag", so
	// we normalize, query, and then map back to the original inputs.

	$map = array();
	foreach ($ids as $key => $slug) {
	$map[$this->normalizeSlug($slug)][] = $slug;
	}

	$projects = id(new PhabricatorProjectQuery())
	->setViewer($viewer)
	->withPhrictionSlugs(array_keys($map))
	->execute();

	$result = array();
	foreach ($projects as $project) {
	$slugs = array($project->getPhrictionSlug());
	foreach ($slugs as $slug) {
	foreach ($map[$slug] as $original) {
	$result[$original] = $project;
	}
	}
	}


	return $result;
	}

	private function normalizeSlug($slug) {
	// NOTE: We're using phutil_utf8_strtolower() (and not PhabricatorSlug's
	// normalize() method) because this normalization should be only somewhat
	// liberal. We want "#YOLO" to match against "#yolo", but "#\\yo!!lo"
	// should not. normalize() strips out most punctuation and leads to
	// excessively aggressive matches.

	return phutil_utf8_strtolower($slug).'/';
	}

	}