HeraldRuleQuery.php
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	<?php

	final class HeraldRuleQuery extends PhabricatorOffsetPagedQuery {

	private $authorPHIDs;
	private $ruleTypes;
	private $contentTypes;

	public function withAuthorPHIDs(array $author_phids) {
	$this->authorPHIDs = $author_phids;
	return $this;
	}

	public function withRuleTypes(array $types) {
	$this->ruleTypes = $types;
	return $this;
	}

	public function withContentTypes(array $types) {
	$this->contentTypes = $types;
	return $this;
	}

	public function execute() {
	$table = new HeraldRule();
	$conn_r = $table->establishConnection('r');

	$where = $this->buildWhereClause($conn_r);
	$order = $this->buildOrderClause($conn_r);
	$limit = $this->buildLimitClause($conn_r);

	$data = queryfx_all(
	$conn_r,
	'SELECT rule.* FROM %T rule %Q %Q %Q',
	$table->getTableName(),
	$where,
	$order,
	$limit);

	return $table->loadAllFromArray($data);
	}

	private function buildWhereClause($conn_r) {
	$where = array();

	if ($this->authorPHIDs) {
	$where[] = qsprintf(
	$conn_r,
	'rule.authorPHID IN (%Ls)',
	$this->authorPHIDs);
	}

	if ($this->ruleTypes) {
	$where[] = qsprintf(
	$conn_r,
	'rule.ruleType IN (%Ls)',
	$this->ruleTypes);
	}

	if ($this->contentTypes) {
	$where[] = qsprintf(
	$conn_r,
	'rule.contentType IN (%Ls)',
	$this->contentTypes);
	}

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

	private function buildOrderClause($conn_r) {
	return 'ORDER BY id DESC';
	}

	}