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|
<?php
namespace Icinga\Module\Director\Data\Db;
use Icinga\Data\Filter\Filter;
use Icinga\Data\Filter\FilterChain;
use Icinga\Data\Filter\FilterException;
use Icinga\Data\Filter\FilterExpression;
class IcingaObjectFilterRenderer
{
/** @var Filter */
protected $filter;
/** @var IcingaObjectQuery */
protected $query;
protected $columnMap = [
'host.name' => 'host.object_name',
'service.name' => 'service.object_name',
];
public function __construct(Filter $filter, IcingaObjectQuery $query)
{
$this->filter = clone($filter);
$this->fixFilterColumns($this->filter);
$this->query = $query;
}
/**
* @param Filter $filter
* @param IcingaObjectQuery $query
*
* @return IcingaObjectQuery
*/
public static function apply(Filter $filter, IcingaObjectQuery $query)
{
$self = new static($filter, $query);
return $self->applyFilterToQuery();
}
/**
* @return IcingaObjectQuery
*/
protected function applyFilterToQuery()
{
$this->query->escapedWhere($this->renderFilter($this->filter));
return $this->query;
}
/**
* @param Filter $filter
* @return string
*/
protected function renderFilter(Filter $filter)
{
if ($filter->isChain()) {
/** @var FilterChain $filter */
return $this->renderFilterChain($filter);
} else {
/** @var FilterExpression $filter */
return $this->renderFilterExpression($filter);
}
}
/**
* @param FilterChain $filter
*
* @throws FilterException
*
* @return string
*/
protected function renderFilterChain(FilterChain $filter)
{
$parts = array();
foreach ($filter->filters() as $sub) {
$parts[] = $this->renderFilter($sub);
}
$op = $filter->getOperatorName();
if ($op === 'NOT') {
if (count($parts) !== 1) {
throw new FilterException(
'NOT should have exactly one child, got %s',
count($parts)
);
}
return $op . ' ' . $parts[0];
} else {
if ($filter->isRootNode()) {
return implode(' ' . $op . ' ', $parts);
} else {
return '(' . implode(' ' . $op . ' ', $parts) . ')';
}
}
}
protected function fixFilterColumns(Filter $filter)
{
if ($filter->isExpression()) {
/** @var FilterExpression $filter */
$col = $filter->getColumn();
if (array_key_exists($col, $this->columnMap)) {
$filter->setColumn($this->columnMap[$col]);
}
if (strpos($col, 'vars.') === false) {
$filter->setExpression(json_decode($filter->getExpression()));
}
} else {
/** @var FilterChain $filter */
foreach ($filter->filters() as $sub) {
$this->fixFilterColumns($sub);
}
}
}
/**
* @param FilterExpression $filter
*
* @return string
*/
protected function renderFilterExpression(FilterExpression $filter)
{
$query = $this->query;
$column = $query->getAliasForRequiredFilterColumn($filter->getColumn());
return $query->whereToSql(
$column,
$filter->getSign(),
$filter->getExpression()
);
}
}
|
