PhabricatorPHID.php
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PhabricatorPHID.php
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	<?php

	/*
	* Copyright 2011 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.
	*/

	class PhabricatorPHID extends PhabricatorPHIDDAO {

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

	public static function generateNewPHID($type, array $config = array()) {
	$owner = idx($config, 'owner');
	$parent = idx($config, 'parent');

	if (!$type) {
	throw new Exception("Can not generate PHID with no type.");
	}

	$urandom = @fopen('/dev/urandom', 'r');
	if (!$urandom) {
	throw new Exception("Failed to open /dev/urandom!");
	}
	$entropy = fread($urandom, 16);
	if (strlen($entropy) != 16) {
	throw new Exception("Failed to read from /dev/urandom!");
	}

	$uniq = sha1($entropy);
	$phid = 'PHID-'.$type.'-X-'.$uniq;

	$phid_rec = new PhabricatorPHID();
	$phid_rec->setPHIDType($type);
	$phid_rec->setOwnerPHID($owner);
	$phid_rec->setParentPHID($parent);
	$phid_rec->setPHID($phid);
	$phid_rec->save();

	return $phid;
	}

	}