Sorter.php
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<?php
namespace ACP\Sorting;
use ACP\Sorting\Type\DataType;
/**
* Sorts an array ascending, maintains index association and returns keys
*/
class Sorter {
/**
* @param array $values [ (int) $id => (string|int|bool) $value ]
* @param DataType|null $data_type
*
* @return int[]
*/
public function sort( array $values, DataType $data_type = null ) {
switch ( (string) $data_type ) {
case DataType::NUMERIC :
$values = array_filter( $values, 'is_numeric' );
asort( $values, SORT_NUMERIC );
return array_keys( $values );
default :
$values = array_filter( $values, 'is_scalar' );
$values = array_filter( $values, [ $this, 'is_not_empty' ] );
$values = array_map( [ $this, 'truncate' ], $values );
natcasesort( $values );
return array_keys( $values );
}
}
/**
* @param mixed $value
*
* @return mixed
*/
private function truncate( $value ) {
return $value && is_string( $value )
? substr( $value, 0, 100 )
: $value;
}
/**
* Allow zero values as nonempty. Allows them to be sorted.
*
* @param string|int|bool $value
*
* @return bool
*/
private function is_not_empty( $value ) {
return $value || 0 === $value || '0' === $value;
}
}