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<?php
namespace ipl\Orm\Behavior;
use ipl\Orm\Contract\PropertyBehavior;
use ipl\Orm\Contract\QueryAwareBehavior;
use ipl\Orm\Contract\RewriteFilterBehavior;
use ipl\Orm\Query;
use ipl\Sql\Adapter\Pgsql;
use ipl\Stdlib\Filter\Condition;
use UnexpectedValueException;
use function ipl\Stdlib\get_php_type;
/**
* Support hex filters for binary columns and PHP resource (in) / bytea hex format (out) transformation for PostgreSQL
*/
class Binary extends PropertyBehavior implements QueryAwareBehavior, RewriteFilterBehavior
{
/**
* Properties for {@see rewriteCondition()} to support hex filters for each adapter
*
* Set in {@see setQuery()} from the {@see $properties} array because the latter is reset for adapters other than
* {@see Pgsql}, so {@see fromDb()} and {@see toDb()} don't run for them.
*
* @var array
*/
protected $rewriteSubjects;
public function fromDb($value, $key, $_)
{
if ($value !== null) {
if (is_resource($value)) {
return stream_get_contents($value);
}
return $value;
}
return null;
}
/**
* @throws UnexpectedValueException If value is a resource
*/
public function toDb($value, $key, $_)
{
if (is_resource($value)) {
throw new UnexpectedValueException(sprintf('Unexpected resource for %s', $key));
}
if ($value === '*') {
/**
* Support IS (NOT) NULL filter transformation.
* {@see \ipl\Sql\Compat\FilterProcessor::assemblePredicate()}
*/
return $value;
}
/**
* TODO(lippserd): If the filter is moved to a subquery, the value has already been processed.
* This is because our filter processor is unfortunately doing the transformation twice at the moment:
*
* {@link https://github.com/Icinga/ipl-orm/issues/48}
*
* {@see \ipl\Orm\Compat\FilterProcessor::requireAndResolveFilterColumns()}
*/
if (substr($value, 0, 2) === '\\x') {
return $value;
}
return sprintf('\\x%s', bin2hex($value));
}
public function setQuery(Query $query)
{
$this->rewriteSubjects = $this->properties;
if (! $query->getDb()->getAdapter() instanceof Pgsql) {
// Only process properties if the adapter is PostgreSQL.
$this->properties = [];
}
}
public function rewriteCondition(Condition $condition, $relation = null)
{
/**
* TODO(lippserd): Duplicate code because {@see RewriteFilterBehavior}s come after {@see PropertyBehavior}s.
* {@see \ipl\Orm\Compat\FilterProcessor::requireAndResolveFilterColumns()}
*/
$column = $condition->metaData()->get('columnName');
if (isset($this->rewriteSubjects[$column])) {
$value = $condition->getValue();
if (empty($this->properties) && is_resource($value)) {
// Only for PostgreSQL.
throw new UnexpectedValueException(sprintf('Unexpected resource for %s', $column));
}
// ctype_xdigit expects strings.
$value = (string) $value;
/**
* Although this code path is also affected by the duplicate behavior evaluation stated in {@see toDb()},
* no further adjustments are needed as ctype_xdigit returns false for binary and bytea hex strings.
*/
if (ctype_xdigit($value)) {
if (empty($this->properties) && substr($value, 0, 2) !== '\\x') {
// Only for PostgreSQL.
$condition->setValue(sprintf('\\x%s', $value));
} else {
$condition->setValue(hex2bin($value));
}
}
}
}
}
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