utils.php
be3c17956128stable

utils.php
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			<?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.
			*/

			/**
			* Look up the type of a PHID. Returns
			* PhabricatorPHIDConstants::PHID_TYPE_UNKNOWN if it fails to look up the type
			*
			* @param phid Anything.
			* @return A value from PhabricatorPHIDConstants (ideally)
			*/
			function phid_get_type($phid) {
			$matches = null;
			if (is_string($phid) && preg_match('/^PHID-([^-]{4})-/', $phid, $matches)) {
			return $matches[1];
			}
			return PhabricatorPHIDConstants::PHID_TYPE_UNKNOWN;
			}

			/**
			* Group a list of phids by type. Given:
			*
			* phid_group_by_type([PHID-USER-1, PHID-USER-2, PHID-PROJ-3])
			*
			* phid_group_by_type would return:
			*
			* [PhabricatorPHIDConstants::PHID_TYPE_USER => [PHID-USER-1, PHID-USER-2],
			* PhabricatorPHIDConstants::PHID_TYPE_PROJ => [PHID-PROJ-3]]
			*
			* @param phids array of phids
			* @return map of phid type => list of phids
			*/
			function phid_group_by_type($phids) {
			$result = array();
			foreach ($phids as $phid) {
			$type = phid_get_type($phid);
			$result[$type][] = $phid;
			}
			return $result;
			}