testing

PhabricatorPHIDResolver.php
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			<?php

			/**
			* Resolve a list of identifiers into PHIDs.
			*
			* This class simplifies the process of convering a list of mixed token types
			* (like some PHIDs and some usernames) into a list of just PHIDs.
			*/
			abstract class PhabricatorPHIDResolver extends Phobject {

			private $viewer;

			final public function setViewer(PhabricatorUser $viewer) {
			$this->viewer = $viewer;
			return $this;
			}

			final public function getViewer() {
			return $this->viewer;
			}

			final public function resolvePHIDs(array $phids) {
			$type_unknown = PhabricatorPHIDConstants::PHID_TYPE_UNKNOWN;

			$names = array();
			foreach ($phids as $key => $phid) {
			if (phid_get_type($phid) == $type_unknown) {
			$names[$key] = $phid;
			}
			}

			if ($names) {
			$map = $this->getResolutionMap($names);
			foreach ($names as $key => $name) {
			if (isset($map[$name])) {
			$phids[$key] = $map[$name];
			}
			}
			}

			return $phids;
			}

			abstract protected function getResolutionMap(array $names);

			}