testing

PhabricatorSlug.php
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			<?php

			final class PhabricatorSlug {

			public static function normalize($slug) {

			// TODO: We need to deal with unicode at some point, this is just a very
			// basic proof-of-concept implementation.

			$slug = strtolower($slug);
			$slug = preg_replace('@/+@', '/', $slug);
			$slug = trim($slug, '/');
			$slug = preg_replace('@[^a-z0-9/]+@', '_', $slug);
			$slug = trim($slug, '_');

			return $slug.'/';
			}

			public static function getDefaultTitle($slug) {
			$parts = explode('/', trim($slug, '/'));
			$default_title = end($parts);
			$default_title = str_replace('_', ' ', $default_title);
			$default_title = ucwords($default_title);
			$default_title = nonempty($default_title, 'Untitled Document');
			return $default_title;
			}

			public static function getAncestry($slug) {
			$slug = self::normalize($slug);

			if ($slug == '/') {
			return array();
			}

			$ancestors = array(
			'/',
			);

			$slug = explode('/', $slug);
			array_pop($slug);
			array_pop($slug);

			$accumulate = '';
			foreach ($slug as $part) {
			$accumulate .= $part.'/';
			$ancestors[] = $accumulate;
			}

			return $ancestors;
			}

			public static function getDepth($slug) {
			$slug = self::normalize($slug);
			if ($slug == '/') {
			return 0;
			} else {
			return substr_count($slug, '/');
			}
			}

			}