<?php

declare(strict_types=1);

namespace TinyBlocks\HttpQuery;

/**

* Direction applied to a single sort field, backed by its canonical token.

*/

enum Direction: string

{

case ASCENDING = 'asc';

case DESCENDING = 'desc';

/**

* Returns the prefix marking the direction in a sort expression.

*

* @return string An empty string when ascending, a leading minus when descending.

*/

public function prefix(): string

{

return match ($this) {

Direction::ASCENDING => '',

Direction::DESCENDING => '-'

};

}

/**

* Returns the strict comparison operator that seeks past the cursor in this direction.

*

* @return string A greater-than sign when ascending, a less-than sign when descending.

*/

public function seekOperator(): string

{

return match ($this) {

Direction::ASCENDING => '>',

Direction::DESCENDING => '<'

};

}

}