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   1  <?php
   2  
   3  declare(strict_types=1);
   4  
   5  /*
   6   * The MIT License (MIT)
   7   *
   8   * Copyright (c) 2018-2020 Spomky-Labs
   9   *
  10   * This software may be modified and distributed under the terms
  11   * of the MIT license.  See the LICENSE file for details.
  12   */
  13  
  14  namespace CBOR\Tag;
  15  
  16  use CBOR\ByteStringObject;
  17  use CBOR\ByteStringWithChunkObject;
  18  use CBOR\CBORObject;
  19  use CBOR\TagObject as Base;
  20  use CBOR\TextStringObject;
  21  use CBOR\TextStringWithChunkObject;
  22  use InvalidArgumentException;
  23  
  24  final class Base64EncodingTag extends Base
  25  {
  26      public static function getTagId(): int
  27      {
  28          return 22;
  29      }
  30  
  31      public static function createFromLoadedData(int $additionalInformation, ?string $data, CBORObject $object): Base
  32      {
  33          return new self($additionalInformation, $data, $object);
  34      }
  35  
  36      public static function create(CBORObject $object): Base
  37      {
  38          if (!$object instanceof ByteStringObject && !$object instanceof ByteStringWithChunkObject && !$object instanceof TextStringObject && !$object instanceof TextStringWithChunkObject) {
  39              throw new InvalidArgumentException('This tag only accepts Byte String, Infinite Byte String, Text String or Infinite Text String objects.');
  40          }
  41  
  42          return new self(22, null, $object);
  43      }
  44  
  45      public function getNormalizedData(bool $ignoreTags = false)
  46      {
  47          if ($ignoreTags) {
  48              return $this->object->getNormalizedData($ignoreTags);
  49          }
  50  
  51          if (!$this->object instanceof ByteStringObject && !$this->object instanceof ByteStringWithChunkObject && !$this->object instanceof TextStringObject && !$this->object instanceof TextStringWithChunkObject) {
  52              return $this->object->getNormalizedData($ignoreTags);
  53          }
  54  
  55          $result = base64_decode($this->object->getNormalizedData($ignoreTags), true);
  56          if (false === $result) {
  57              throw new InvalidArgumentException('Unable to decode the data');
  58          }
  59  
  60          return $result;
  61      }
  62  }