DifferentialRevisionVoidTransaction.php
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DifferentialRevisionVoidTransaction.php
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			<?php

			/**
			* This is an internal transaction type used to void reviews.
			*
			* For example, "Request Review" voids any open accepts, so they no longer
			* act as current accepts.
			*/
			final class DifferentialRevisionVoidTransaction
			extends DifferentialRevisionTransactionType {

			const TRANSACTIONTYPE = 'differential.revision.void';

			public function generateOldValue($object) {
			return false;
			}

			public function generateNewValue($object, $value) {
			$table = new DifferentialReviewer();
			$table_name = $table->getTableName();
			$conn = $table->establishConnection('w');

			$rows = queryfx_all(
			$conn,
			'SELECT reviewerPHID FROM %T
			WHERE revisionPHID = %s
			AND voidedPHID IS NULL
			AND reviewerStatus IN (%Ls)',
			$table_name,
			$object->getPHID(),
			$value);

			return ipull($rows, 'reviewerPHID');
			}

			public function getTransactionHasEffect($object, $old, $new) {
			return (bool)$new;
			}

			public function applyExternalEffects($object, $value) {
			$table = new DifferentialReviewer();
			$table_name = $table->getTableName();
			$conn = $table->establishConnection('w');

			queryfx(
			$conn,
			'UPDATE %T SET voidedPHID = %s
			WHERE revisionPHID = %s
			AND voidedPHID IS NULL
			AND reviewerPHID IN (%Ls)',
			$table_name,
			$this->getActingAsPHID(),
			$object->getPHID(),
			$value);
			}

			public function shouldHide() {
			// This is an internal transaction, so don't show it in feeds or
			// transaction logs.
			return true;
			}

			private function getVoidableStatuses() {
			return array(
			DifferentialReviewerStatus::STATUS_ACCEPTED,
			DifferentialReviewerStatus::STATUS_REJECTED,
			);
			}

			}