json 82 vs 83 work around.patch

 modules/json82/json82.info.yml               |  5 +++++
 modules/json82/json82.services.yml           |  5 +++++
 modules/json82/src/Json82Encoder.php         | 14 ++++++++++++++
 modules/json82/src/Json82ServiceModifier.php | 28 ++++++++++++++++++++++++++++
 4 files changed, 52 insertions(+)

diff --git a/modules/json82/json82.info.yml b/modules/json82/json82.info.yml
new file mode 100644
index 0000000..3eabde8
--- /dev/null
+++ b/modules/json82/json82.info.yml
@@ -0,0 +1,5 @@
+name: JSON 8.2 compat
+type: module
+core: 8.x
+dependencies:
+  - serialization
diff --git a/modules/json82/json82.services.yml b/modules/json82/json82.services.yml
new file mode 100644
index 0000000..8006193
--- /dev/null
+++ b/modules/json82/json82.services.yml
@@ -0,0 +1,5 @@
+services:
+  serializer.encoder.json83:
+    class: Drupal\serialization\Encoder\JsonEncoder
+    tags:
+      - { name: encoder, format: json83 }
diff --git a/modules/json82/src/Json82Encoder.php b/modules/json82/src/Json82Encoder.php
new file mode 100644
index 0000000..60bb400
--- /dev/null
+++ b/modules/json82/src/Json82Encoder.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Drupal\json82;
+
+use Drupal\serialization\Encoder\JsonEncoder as BaseJsonEncoder;
+use Symfony\Component\Serializer\Encoder\JsonDecode;
+use Symfony\Component\Serializer\Encoder\JsonEncode;
+
+// Revert the JSON encoder changes in Drupal 8.3.
+// @see https://www.drupal.org/node/2813755
+class JsonEncoder extends BaseJsonEncoder {
+  public function __construct(JsonEncode $encodingImpl = NULL, JsonDecode $decodingImpl = NULL) {
+  }
+}
\ No newline at end of file
diff --git a/modules/json82/src/Json82ServiceModifier.php b/modules/json82/src/Json82ServiceModifier.php
new file mode 100644
index 0000000..4b085c1
--- /dev/null
+++ b/modules/json82/src/Json82ServiceModifier.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace Drupal\json82;
+
+use Drupal\Core\DependencyInjection\ContainerBuilder;
+use Drupal\Core\DependencyInjection\ServiceModifierInterface;
+
+class Json82ServiceProvider implements ServiceModifierInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function alter(ContainerBuilder $container) {
+    // Keep 'format=json' using the 8.2 JSON encoding.
+    $container->getDefinition('serializer.encoder.json')->setClass(JsonEncoder::class);
+
+    // Add a new service with the >= 8.3 JSON encoding.
+    if ($container->has('http_middleware.negotiation') && is_a($container->getDefinition('http_middleware.negotiation')
+        ->getClass(), '\Drupal\Core\StackMiddleware\NegotiationMiddleware', TRUE)
+    ) {
+      $container->getDefinition('http_middleware.negotiation')
+        ->addMethodCall('registerFormat', [
+          'json83',
+          ['application/json'], // Question: is it okay to have multiple formats with the same MIME type?
+        ]);
+    }
+  }
+}