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<?php |
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namespace DutchCodingCompany\CursorPagination; |
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use Illuminate\Contracts\Support\Arrayable; |
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use Illuminate\Contracts\Support\Jsonable; |
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use Illuminate\Support\Arr; |
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/** |
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* Encode and decode pagination cursors. |
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*/ |
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class Cursor implements Arrayable |
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{ |
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protected $after = null; |
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public function __construct($after = null) |
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{ |
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$this->after = $after; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isPresent() |
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{ |
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return $this->hasAfter(); |
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} |
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/** |
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* @return bool |
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*/ |
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public function hasAfter() |
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{ |
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return !is_null($this->after); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getAfterCursor() |
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{ |
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return $this->after; |
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} |
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/** |
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* Decode cursor from query arguments. |
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* |
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* If no 'after' argument is provided or the contents are not a valid base64 string, |
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* this will return empty array. That will effectively reset pagination, so the user gets the |
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* first slice. |
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* |
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* @param array<string, mixed> $args |
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*/ |
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public static function decode(?array $args): Cursor |
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{ |
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$after = null; |
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if ($cursor = Arr::get($args, 'after')) { |
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$after = json_decode(base64_decode($cursor), true); |
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} |
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return new static($after); |
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} |
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/** |
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* Encode the given offset to make the implementation opaque. |
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*/ |
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public static function encode(array $data): string |
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{ |
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return base64_encode(json_encode($data)); |
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} |
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public function toArray() |
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{ |
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return [ |
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'after' => static::encode($this->after), |
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]; |
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} |
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} |
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DutchCodingCompany /
cursor-pagination
