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DifferentialReviewerStatus.php
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			<?php

			final class DifferentialReviewerStatus extends Phobject {

			const STATUS_BLOCKING = 'blocking';
			const STATUS_ADDED = 'added';
			const STATUS_ACCEPTED = 'accepted';
			const STATUS_REJECTED = 'rejected';
			const STATUS_COMMENTED = 'commented';
			const STATUS_ACCEPTED_OLDER = 'accepted-older';
			const STATUS_REJECTED_OLDER = 'rejected-older';
			const STATUS_RESIGNED = 'resigned';

			/**
			* Returns the relative strength of a status, used to pick a winner when a
			* transaction group makes several status changes to a particular reviewer.
			*
			* For example, if you accept a revision and leave a comment, the transactions
			* will attempt to update you to both "commented" and "accepted". We want
			* "accepted" to win, because it's the stronger of the two.
			*
			* @param const $constant Reviewer status constant.
			* @return int Relative strength (higher is stronger).
			*/
			public static function getStatusStrength($constant) {
			$map = array(
			self::STATUS_ADDED => 1,

			self::STATUS_COMMENTED => 2,

			self::STATUS_BLOCKING => 3,

			self::STATUS_ACCEPTED_OLDER => 4,
			self::STATUS_REJECTED_OLDER => 4,

			self::STATUS_ACCEPTED => 5,
			self::STATUS_REJECTED => 5,
			self::STATUS_RESIGNED => 5,
			);

			return idx($map, $constant, 0);
			}

			}