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1 <?php
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2
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3 namespace Drupal\serialization\Encoder;
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4
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5 use Symfony\Component\Serializer\Encoder\DecoderInterface;
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6 use Symfony\Component\Serializer\Encoder\EncoderInterface;
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7 use Symfony\Component\Serializer\Encoder\JsonDecode;
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8 use Symfony\Component\Serializer\Encoder\JsonEncode;
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9 use Symfony\Component\Serializer\Encoder\JsonEncoder as BaseJsonEncoder;
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10
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11 /**
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12 * Adds 'ajax to the supported content types of the JSON encoder'
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13 *
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14 * @internal
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15 * This encoder should not be used directly. Rather, use the `serializer`
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16 * service.
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17 */
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18 class JsonEncoder extends BaseJsonEncoder implements EncoderInterface, DecoderInterface {
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19
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20 /**
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21 * The formats that this Encoder supports.
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22 *
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23 * @var array
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24 */
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25 protected static $format = ['json', 'ajax'];
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26
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27 /**
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28 * {@inheritdoc}
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29 */
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30 public function __construct(JsonEncode $encodingImpl = NULL, JsonDecode $decodingImpl = NULL) {
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31 $this->encodingImpl = $encodingImpl ?: $this->getJsonEncode();
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32 $this->decodingImpl = $decodingImpl ?: $this->getJsonDecode();
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33 }
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34
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35 /**
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36 * Instantiates a JsonEncode instance.
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37 *
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38 * @internal this exists to bridge Symfony 3 to Symfony 4, and can be removed
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39 * once Drupal requires Symfony 4.2 or higher.
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40 */
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41 private function getJsonEncode() {
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42 // Encode <, >, ', &, and " for RFC4627-compliant JSON, which may also be
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43 // embedded into HTML.
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44 // @see \Symfony\Component\HttpFoundation\JsonResponse
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45 $json_encoding_options = JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT;
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46 $reflection = new \ReflectionClass(JsonEncode::class);
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47 if (array_key_exists('OPTIONS', $reflection->getConstants())) {
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48 return new JsonEncode([JsonEncode::OPTIONS => $json_encoding_options]);
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49 }
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50 return new JsonEncode($json_encoding_options);
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51 }
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52
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53 /**
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54 * Instantiates a JsonDecode instance.
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55 *
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56 * @internal this exists to bridge Symfony 3 to Symfony 4, and can be removed
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57 * once Drupal requires Symfony 4.2 or higher.
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58 */
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59 private function getJsonDecode() {
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60 $reflection = new \ReflectionClass(JsonDecode::class);
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61 if (array_key_exists('ASSOCIATIVE', $reflection->getConstants())) {
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62 return new JsonDecode([JsonDecode::ASSOCIATIVE => TRUE]);
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63 }
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64 return new JsonDecode(TRUE);
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65 }
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66
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67 /**
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68 * {@inheritdoc}
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69 */
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70 public function supportsEncoding($format) {
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71 return in_array($format, static::$format);
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72 }
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73
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74 /**
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75 * {@inheritdoc}
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76 */
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77 public function supportsDecoding($format) {
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78 return in_array($format, static::$format);
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79 }
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80
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81 }
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