JsonEncoder.php

<?php

namespace Drupal\serialization\Encoder;

use Symfony\Component\Serializer\Encoder\JsonDecode;
use Symfony\Component\Serializer\Encoder\JsonEncode;
use Symfony\Component\Serializer\Encoder\JsonEncoder as BaseJsonEncoder;

/**
 * Adds 'ajax' to the supported content types of the JSON encoder.
 *
 * @internal
 *   This encoder should not be used directly. Rather, use the `serializer`
 *   service.
 */
class JsonEncoder extends BaseJsonEncoder {
    
    /**
     * The formats that this Encoder supports.
     *
     * @var array
     */
    protected static $format = [
        'json',
        'ajax',
    ];
    
    /**
     * {@inheritdoc}
     */
    public function __construct(?JsonEncode $encodingImpl = NULL, ?JsonDecode $decodingImpl = NULL) {
        // Encode <, >, ', &, and " for RFC4627-compliant JSON, which may also be
        // embedded into HTML.
        // @see \Symfony\Component\HttpFoundation\JsonResponse
        $json_encoding_options = JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT;
        $this->encodingImpl = $encodingImpl ?: new JsonEncode([
            JsonEncode::OPTIONS => $json_encoding_options,
        ]);
        $this->decodingImpl = $decodingImpl ?: new JsonDecode([
            JsonDecode::ASSOCIATIVE => TRUE,
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function supportsEncoding(string $format, array $context = []) : bool {
        return in_array($format, static::$format);
    }
    
    /**
     * {@inheritdoc}
     */
    public function supportsDecoding(string $format, array $context = []) : bool {
        return in_array($format, static::$format);
    }

}