PhabricatorPHID.php
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	<?php

	final class PhabricatorPHID {

	protected $phid;
	protected $phidType;
	protected $ownerPHID;
	protected $parentPHID;

	public static function generateNewPHID($type, $subtype = null) {
	if (!$type) {
	throw new Exception("Can not generate PHID with no type.");
	}

	if ($subtype === null) {
	$uniq_len = 20;
	$type_str = "{$type}";
	} else {
	$uniq_len = 15;
	$type_str = "{$type}-{$subtype}";
	}

	$uniq = Filesystem::readRandomCharacters($uniq_len);
	return "PHID-{$type_str}-{$uniq}";
	}

	public static function fromObjectName($name, PhabricatorUser $viewer) {
	$query = id(new PhabricatorObjectQuery())
	->setViewer($viewer)
	->withNames(array($name));
	$query->execute();

	$objects = $query->getNamedResults();
	if ($objects) {
	return head($objects)->getPHID();
	}

	/// TODO: Destroy this legacy stuff.

	$object = null;
	$match = null;
	if (preg_match('/^PHID-[A-Z]+-.{20}$/', $name)) {
	// It's already a PHID! Yay.
	return $name;
	}

	if ($object) {
	return $object->getPHID();
	}

	return null;
	}
	}