feat: first support of bindings for AVRO key (#77)

* feat: support of AVRO bindings key

Close #67

* fixup: PR review, only handle kafka key on bindings

* fix linter errors

* fixup: magicmatatjahu PR suggestion

Co-authored-by: Maciej Urbańczyk <urbanczyk.maciej.95@gmail.com>

Co-authored-by: Maciej Urbańczyk <urbanczyk.maciej.95@gmail.com>

index.js

@@ -7,6 +7,20 @@ module.exports.parse = async ({ message, defaultSchemaFormat }) => {
   message['x-parser-original-payload'] = message.payload;
   message.payload = transformed;
   delete message.schemaFormat;
+
+  // remove that function when https://github.com/asyncapi/spec/issues/622 will be introduced in AsyncAPI spec
+  async function handleKafkaProtocolKey() {
+    if (message.bindings && message.bindings.kafka) {
+      const key = message.bindings.kafka.key;
+      if (key) {
+        const bindingsTransformed = await avroToJsonSchema(key);
+        message['x-parser-original-bindings-kafka-key'] = key;
+        message.bindings.kafka.key = bindingsTransformed;
+      }
+    }
+  }
+
+  await handleKafkaProtocolKey();
 };
 
 module.exports.getMimeTypes = () => {

tests/asyncapi-avro-1.9.0-bindings.yaml

@@ -0,0 +1,19 @@
+asyncapi: 2.0.0
+info:
+  title: My API
+  version: '1.0.0'
+channels:
+  mychannel:
+    publish:
+      message:
+        schemaFormat: application/vnd.apache.avro;version=1.9.0
+        payload:
+          $ref: 'schemas/Person-1.9.0-namespace.avsc'
+        bindings:
+          kafka:
+            key:
+              $ref: 'schemas/Person-1.9.0-namespace.avsc'
+          mqtt:
+            x-test:
+              type: string
+