testing

ConpherenceParticipantCountQuery.php
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			<?php

			final class ConpherenceParticipantCountQuery
			extends PhabricatorOffsetPagedQuery {

			private $participantPHIDs;
			private $unread;

			public function withParticipantPHIDs(array $phids) {
			$this->participantPHIDs = $phids;
			return $this;
			}

			public function withUnread($unread) {
			$this->unread = $unread;
			return $this;
			}

			public function execute() {
			$thread = new ConpherenceThread();
			$table = new ConpherenceParticipant();
			$conn = $table->establishConnection('r');

			$rows = queryfx_all(
			$conn,
			'SELECT COUNT(*) as count, participantPHID
			FROM %T participant JOIN %T thread
			ON participant.conpherencePHID = thread.phid %Q %Q %Q',
			$table->getTableName(),
			$thread->getTableName(),
			$this->buildWhereClause($conn),
			$this->buildGroupByClause($conn),
			$this->buildLimitClause($conn));

			return ipull($rows, 'count', 'participantPHID');
			}

			protected function buildWhereClause(AphrontDatabaseConnection $conn) {
			$where = array();

			if ($this->participantPHIDs !== null) {
			$where[] = qsprintf(
			$conn,
			'participant.participantPHID IN (%Ls)',
			$this->participantPHIDs);
			}

			if ($this->unread !== null) {
			if ($this->unread) {
			$where[] = qsprintf(
			$conn,
			'participant.seenMessageCount < thread.messageCount');
			} else {
			$where[] = qsprintf(
			$conn,
			'participant.seenMessageCount >= thread.messageCount');
			}
			}

			return $this->formatWhereClause($where);
			}

			private function buildGroupByClause(AphrontDatabaseConnection $conn) {
			return qsprintf(
			$conn,
			'GROUP BY participantPHID');
			}

			}